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  • Offer Profile
  • Optotune develops and manufactures industry shaping active optical components that allow customers around the globe to innovate. Founded in 2008, we started out with our core technology of focus tunable lenses, which was inspired by the working principle of the human eye. Laser speckle reducers, 2D mirrors and tunable prisms are further additions to our product lines. Thanks to our deep understanding of optics and mechanics and a passion for technology, Optotune is your ideal partner when it comes to solving challenges where conventional optics fail.
Product Portfolio
  • Focus tunable lenses – Overview

  • Optotune is a leading supplier of focus tunable lenses for diverse applications. Whether electrically or mechanically actuated, the advantages of tunable lenses over traditional optics are striking. Optotune's lenses can be taylored to your specific demands in terms of size, tuning range, transmission range or speed. Tell us your requirements and we will be happy to assess the feasibility.
      • Fast electrically tunable lens EL-3-10

      • The compact EL-3-10 lens was designed for OEM integration into optical systems for various applications. The working principle is based on the well-established shape-changing lens technology. The curvature of the lens is adjusted by applying an electrical current. Thereby, the focal length is tuned to a desired value within very few milliseconds. The lens architecture is “push pull” which means that the lens curvature is deflected from concave to convex. With actuators based on proven voice-coil technology, the EL-3-10 focus tunable lens is extremely reliable and robust, well suited even for applications in harsh environments over large temperature ranges.

        Applications
        Applications for Optotune's EL-3-10 are among others:
        • Microscopy
        • Biometric systems
        • Optical coherence tomography (OCT)
        • Laser illumination
        • Laser shows
      • Fast electrically tunable lens EL-10-30-TC

      • Design faster and more compact optical systems without complex mechanics using the electrically focus tunable lens EL-10-30-TC. By applying a current, the focal length of the 10 mm aperture lens can be tuned to a specific value in milliseconds. Thanks to an integrated temperature sensor and characterization data, the lens can be driven to precise focal powers using Optotune's lens driver 4. The EL-10-30-TC is available with two broadband coating options, VIS for 400-700nm and NIR for 700-1100nm.

        Applications
        Applications for Optotune's EL-10-30-TC are among others:
        • Microscopy
        • Atom trapping
        • Optical coherence tomography (OCT)
        • Laser shows
      • Fast electrically tunable lens EL-10-30-C

      • Design faster and more compact optical systems without complex mechanics using the electrically focus tunable lens EL-10-30-C. By applying a current of 0 to 300mA, the focal length of the 10 mm aperture lens can be tuned to a specific value within milliseconds. The EL-10-30-C also features threads on either side for easy mounting as well as the possibility to replace the cover glass with a fixed focus offset lens, allowing for free adjustment of the focal length range according to the requirements of your application.

        Applications
        Applications for Optotune's EL-10-30-C are among others:
        • Machine vision
        • Microscopy
        • Biometric systems
        • Optical coherence tomography
      • Fast electrically tunable lens EL-10-42-OF

      • The electrically focus-tunable lens EL-10-42-OF is dedicated to 3D laser processing applications and sets the highest standards in terms of spot quality, speed and repeatability. With a focus tuning range of -2.0 to +2.0 diopters the spot can be controlled over a large range along the z-axis (working distance change of up to 180mm). Our proprietary built-in optical feedback mechanism allows for a long term repeatability of <0.02 diopters. The EL-10-42-OF is optimized for the use at 1064nm and 532nm.

        Applications
        Applications for Optotune's EL-10-42-OF are among others:
        • Laser marking
        • Micromachining
        • OCT
        • 3D printing
        • Laser projection templating
      • Fast electrically tunable lens EL-16-40-TC

      • With a clear aperture of 16 mm Optotune presents the worlds‘s largest electrically focus tunable lens. Its design has been optimized in many ways:

        The 60% larger aperture than its predecessor, the EL-10-30, allows for 2.5x more light throughput
        The tunable lens can be shaped from a flat zero-state into a plano-concave or plano-convex lens, resulting in a focal tuning range of up to -10 to +10 diopters (at -250 to +250mA)
        The design was optimized to minimize thermal drift effects to as little as 0.02 dpt/°C and with the built in temperature sensor, an overall reproducibility of typically +/- 0.05 diopters is achievable
        Response & settling times are 5 & 25ms, respectively, which is still magnitudes faster than most mechanical alternatives
        Integration of the lens shaper inside the container allows for the highest possible positioning accuracy of the tunable lens
        The EL-16-40-TC is available in its compact form for OEM integration but also with multiple thread adapters and a robust Hirose connector for industrial use, where the tunable lens can be easily combined with off-the-shelf imaging lenses.

        Applications
        Applications for Optotune's EL-16-40-TC are among others:
        • Machine vision
        • Microscopy
        • True 3D in augmented and virtual reality
        • Refraction correction in ophthalmic devices
    • Lens Drivers

        • Electrical lens driver 4

        • The Lens Driver 4 offers a simple yet precise way to control Optotune’s electrically tunable lenses, in particular the EL-6-18 and EL-10-30 series. Communication with the driver follows an open simple serial protocol, which can be implemented in any programming language on Windows or Linux (C#, Labview and Python source code available). The driver comes with free software and can be used as a standalone solution or integrated into OEM designs. As a compact USB-powered current source, it also serves for driving LEDs or laser diodes.

          Main features:
          • Current control from -290 to +290 mA in 0.07mA steps
          • Drive frequencies from 0.2 to 2000 Hz (rectangular, triangular or sinusoidal)
          • I2C sensor read-out e.g. for temperature compensation ("Focal Power Mode")
          • USB powered (5V)
          • Driver software for Windows 7, 8 & 10
          • Available with plastic, steel or without housing

          This constant current source is suitable for:
          • Electrically tunable lenses
          • LEDs
          • Laser diodes
        • Industrial Lens Controller TR-CL180 by Gardasoft

        • Designed for industrial use, this Lens Controller by Gardasoft is the ideal solution for machine vision customers. GigE Vision, RS232 and analog inferfaces as well as numerous SDKs allow for easy integration. The trigger input and fast response time of the controller make it also interesting for Z-stacking in microscopy and life science applications.

          Main features:
          • Current control from -400 to +400 mA in 0.1mA steps at 0.5mA accuracy
          • GigE Vision, RS232 & front panel interfaces
          • 0-10V analog input (12-bit)
          • I2C sensor read-out for temperature compensation ("Focal Power Mode")
          • Power supply: 24V
          • SDKs: C++, C#, VB, Labview, Cognex VisionPro, Teledyne Dalsa Sherlock, Stemmer Imaging CVB
        • EL-E-OF-A Lens Driver for EL-10-42-OF with Analog Interface (0-5V)

        • The EL-E-OF-A enables the control of the EL-10-42-OF lens module via an analog voltage signal. Several digital signals are available for status verification. The electronics essentially provides an analog-to-digital stage to read the control and set voltage signal, digital processing with an implemented PID-loop and current sources to drive the lens and the heater unit. The board is optimized for OEM-integration in laser marking systems and therefore comes without housing.

          Main features:
          • Analog control voltage from 0 to 5 V (ADC resolution 16 bit
          • Sampling rate 1.1 kHz
          • Lens driving current ranging from 0 to 300 m
          • Integrated optical feedback (OF) control
          • JTAG or USB interface for firmware update
        • SCAPS Optotune-DSD Lens Driver for EL-10-42-OF with Digital Interface (XY2-100)

        • Optotune-DSD is an FPGA-based digital controller which is used for the control of the EL-10-42-OF lens module. The board is composed of two layers for which the top one is Digital Servo Interface (DSI-1-O16) and the bottom one is Digital Servo Controller (DSC-1). The board is particularly designed and optimized for OEM-integration in 3D laser marking systems.

          Main features:
          • Pulse-width modulation (PWM) based lens control
          • Automatic tuning for the lens
          • Tracking delay of <1ms
          • Heater control unit
          • XY2-100 and bi-directional XY-SCAPS interface
          • Marking speed up to 8000 mm/s for a 45-degree hatching job
      • Laser speckle reducers – Overview

      • Optotune's laser speckle reducers are nothing other than moving diffusers. But the way they are actuated is absolutely unique. Two innovative technologies are offered, each with its own advantages.

        Electro-active polymer LSR
        With its launch in 2011, Optotune is the first to commercialize electro-active polymers (EAPs) in the field of optics. The basis of this approach is a thin, elastic membrane that carries a lightweight diffuser in its center and four electrodes surrounding it. Actuated at a 90° phase shift, the electrodes induce a circular oscillation of the diffuser in x- and y-direction. The ultra-compact form factor, minimal weight and the absence of noise and vibrations make this technology particularly attractive for hand-held devices.

        Reluctance force LSR
        Launched in 2016, the reluctance force LSR is particularly suitable for applications that require large format glass diffusers. The basis of this approach is a single thin steel structure that is brought into resonance by pulsing an actuating coil with current, which generates a strong reluctance force. Thanks to a high q-factor large amplitudes in the range of 800um are achieved at low power consumption even for heavy glass diffusers.
          • Electroactive polymer LSR

          • Within a height of less than 1mm, electroactive polymers are used to bring a polymer diffuser into resonant oscillation with e.g. 400µm travel at several 100 Hz. This electrostatic principle is very power-efficient, completely silent and free of vibrations, an ideal choice for hand-held devices.
            • Ultra compact
            • No noise
            • No vibration
            • Low power
              • Transmissive laser speckle reducer LSR-3005

              • The LSR-3005 is designed for practical use on your optics table and integrates certified drive electronics powered through a single micro-USB connector (5VDC). Four standard diffuser configurations are available ranging from 6° (highest optical efficiency) to 24° (best speckle reduction). Most models combine an oscillating diffuser with a static diffuser to reduce the correlation length of the random patterns that are generated. This provides more effective speckle reduction yet minimizing the increase in beam divergence. The 17° model, which consists of a dynamic diffuser only, is particularly suitable when the diffuser needs to be in the image plane as is the case e.g. with holographic LCOS or in fiber coupling setups.

                With an oscillation frequency of 300Hz and an amplitude of about 300um, the 5mm aperture model is the preferred choice for applications with high frame rates. VIS and NIR coated cover glasses are provided as a standard. Other coating options as well as diffuser combinations are available upon request.
              • Transmissive laser speckle reducer LSR-3010

              • The LSR-3010 is designed for practical use on your optics table and integrates certified drive electronics powered through a single micro-USB connector (5VDC). Two standard diffuser configurations are available: 6° for highest optical efficiency and 12° for best speckle reduction. Both models combine an oscillating diffuser with a static diffuser to reduce the correlation length of the random patterns that are generated. This provides more effective speckle reduction yet minimizing the increase in beam divergence.

                With an oscillation frequency of 180Hz and an amplitude of about 400um, the 10mm aperture model is the preferred choice for applications with frame rates below 180Hz or for the human eye. For the LSR-3010 series only VIS coated cover glasses are provided as a standard. Other coating options as well as diffuser combinations are available upon request
              • Transmissive laser speckle reducer LSR-5-17

              • The OEM version of Optotune's laser speckle reducer comes with a minimal housing and is available with or without drive electronics.

                The most important parameter is the choice of diffuser angles. Standard diffuser angles of 1°, 4.3°, 8.5° and 17° are available. The LSR consists of a dynamic diffuser and optionally a subsequent static diffuser. The latter is recommended when no homogenizing optics follow the LSR to increase the speckle reduction factor. Finding an appropriate system layout is key to effective and efficient speckle reduction. Our application note contains several suggestions, suitable for a variety of applications.

                Optotune’s standard diffusers are made of a proprietary polymer, which offers a transmission range of 240 to 2500nm at a typical transmission of 93% and damage threshold of 300W/cm2. The diffuser itself is not coated, however VIS and NIR coated cover glasses are available as a standard. It is also possible to work with glass diffusers if they are similar in size and weight.

                With an oscillation frequency of 300Hz and an amplitude of about 300um, the 5mm aperture model is the preferred choice for applications with high frame rates.
              • Transmissive laser speckle reducer LSR-10-22

              • The OEM version of Optotune's laser speckle reducer comes with a minimal housing and is available with or without drive electronics.

                The most important parameter is the choice of diffuser angles. Standard diffuser angles of 1°, 4.3°, 8.5° and 17° are available. The LSR consists of a dynamic diffuser and optionally a subsequent static diffuser. The latter is recommended when no homogenizing optics follow the LSR to increase the speckle reduction factor. Finding an appropriate system layout is key to effective and efficient speckle reduction. Our application note contains several suggestions, suitable for a variety of applications.

                Optotune’s standard diffusers are made of a proprietary polymer, which offers a transmission range of 240 to 2500nm at a typical transmission of 93% and damage threshold of 300W/cm2. The diffuser itself is not coated, however VIS and NIR coated cover glasses are available as a standard. It is also possible to work with glass diffusers if they are similar in size and weight.

                With an oscillation frequency of 180 Hz and an amplitude of about 400um, the 10mm aperture model is the preferred choice for applications with frame rates below 180Hz or for the human eye.
              • Laser speckle reducer electronics

              • Optotune's laser speckle reducers employ electroactive polymer electrodes to actuate a diffuser. Each time an electrode is charged at high voltage (300V in the case of the standard LSR-5-17 and LSR-10-22 series) the electrode expands.

                Although the voltage is high, the energy required for charging an electrode is minimal as its capacitance is only in the range of 100pF. Four electrodes are used, which must be each charged with the same voltage, but with a phase shift of 90° in between to create the circular oscillating movement. Highest speckle reduction is reached by driving the electrodes at the resonant frequency of the mechanical system (e.g. 300Hz for the LSR-5-17).

                The OEM products LSR-5-17 and LSR-10-22 are available with or without drive electronics. The standard electronics design by Optotune generates the 300V from a 5V input using a xenon flash charger IC and a high-voltage transformer. A microcontroller and four MOSFETs take care of the correct switching of the 300V among the electrodes. Schematics and part list are available upon request.
            • Reluctance force LSR

                  • Transmissive Laser Speckle Reducer LSR-4C

                  • Optotune’s LSR-4C speckle reducer has an aperture of 18.5x18.5 mm and is especially suitable for applications where high laser powers and large beam diameters are used. The diffusor is mounted in a thin steel frame. As part of a larger metallic structure the frame is set into motion by the reluctance force, generated by the oscillating magnetic field of a driving coil. If required, the LSR-4C can combine two oscillating diffusors rotated by 90°, realizing optimized despeckling in both directions. The compact driving electronics, assembled on a flexible plastic substrate, stabilizes the resonance frequency in closed-loop mode and includes an error signal.
              • Beam steering and Beam shifting

                  • Beam steering

                  • Optotune is developing 2D beam steering solutions that can be used in reflection mode (2D mirror) or in transmission mode (tunable prism).

                    Dual axis vector scan mirror with position feedback
                    Optotune’s dual axis mirrors offer the benefit of large deflections and large mirror size in a compact package. The actuator is based on proven technologies. A built-in position feedback allows it to be accurately controlled with a standard PID controller. The virtual rotation point of our 2D mirrors is close to the mirror surface which makes 2D scanning straight forward. Applications range from automotive (LiDAR, dynamic headlights, ADAS) and vision (field-of-view expansion, zoom) to biometric (eye-tracking), diagnostics and 3D printing.

                    Tunable prism for laser alignment and image stabilization
                    Optotune‘s tunable prism (TP) is suitable for optical alignment and beam-steering in transmission. The core element can be combined with your preferred actuation method and achieve a compact form factor. The low absorption makes it suitable for high-power applications. Thanks to the low dispersion liquid it can also be used for polychromatic applications.

                    3D beam steering
                    Combining a 2D mirror for x/y with an electrically focus tunable lens allows you to direct your laser beam spot precisely and fast at any point within the addressable volume. This can be of interest for dynamic headlights, diagnostic and spectroscopic devices and 3D printing.
                      • Dual axis mirror with position feedback MR-15-30

                      • Optotune’s dual axis mirror series MR-15-30 is the ideal choice for applications that require large deflections in a compact form factor. With a mirror size of 15mm the MR-15-30 achieves up to +/- 25° mechanical tilt, which results in up to +/- 50° optical deflection. The mirror includes a position feedback system which allows it to be accurately controlled with a standard PID controller.
                        The actuator is based on proven technologies. In contrast to galvo mirror systems, the virtual rotation point is very close to the mirror surface. The mirror can be fabricated with various coatings such as gold, protected silver and other coatings on request.

                        Applications
                        • Applications for Optotune's MR-15-30 are among others:
                        • Automotive (LiDAR, dynamic headlights, ADAS)
                        • Vision (field-of-view expansion, zoom)
                        • Biometric (eye-tracking)
                        • Diagnostic equipment
                        • 3D printing
                      • Mirror driver v1

                      • Optotune’s Mirror driver v1 is a flexible driver for the MR-15-30 dual axis mirror series. It is ideally suited for testing and product development with the MR-15-30 mirror. The Mirror driver v1 consists of two main hardware blocks. The first acts as a Data Acquisition (DAQ) board while the second is a third-party FPGA evaluation kit which is used as a Digital Signal Processing (DSP) unit to operate the mirror.

                        The package includes a breakout board connecting to the mirror and a cable interfacing the breakout board with the interface board. The driver is compatible only with mirrors produced by Optotune Switzerland AG and allows various operation modes. These modes can be selected via USB communication with a host PC. The Mirror driver v1 offers the following communication interfaces:
                        • USB 2.0 serial communication to a host
                        • Simple Mode operation to control basic mirror movements via HTERM
                        • Pro Mode operation to control advanced mirror functions and settings from a Python environment
                        • Real Time (RT) SPI mode
                        • Analog mode
                      • Tunable prism TP-12-16 for laser alignment and image stabilization

                      • The tunable prism is a tunable wedge that allows to tilt two optically flat and AR coated glass windows with respect to each other. The two glass windows are held together by a bellow structure that is filled with a low dispersion clear optical fluid. The core element can be integrated with a large variety of actuation principles such as mechanical or motorized lead screws, voice-coil and piezo actuators.
                        The following table outlines the specifications of our standard tunable prism core element for a particular fluid. Cover glass coatings and fluids can be adapted on demand.

                        Applications
                        Applications for Optotune's TP-12-16 are among others:
                        • Intuitive beam-steering in transmission configuration
                        • Alignment between source and detector
                        • Laser range finder
                        • Image stabilization
                    • Beam shifting

                          • Extended Pixel Resolution Actuator XPR-25

                          • Optotune’s XPR-25 is an Extended Pixel Resolution 4-position Actuator. With a clear aperture of about 25mm it has been designed for Texas Instrument’s 0.47” DMD and enables the perceived image resolution to be increased from its native 1080p to 4K. The XPR-25 is compatible both with the Pico and ECD chipsets of the 0.47” DMD.

                            Main features:
                            • High angular position accuracy of typically +/-8%
                            • Fast transition times of typically 1.1 to 1.3ms
                            • Low acoustic noise of typically 25dBA
                            • Fully pre-calibrated at 50 & 60Hz for temperatures up to 75°C

                            Other beam shifting applications
                            Beyond the use case at 50 or 60Hz in projectors, the XPR-25 can also be used in DC mode or calibrated to perform different shifting patterns. Further applications are:
                            • 3D printing (resolution increase and/or smoothing)
                            • Cameras (super-resolution imaging)
                            • Metrology
                      • Technology

                          • Focus tunable lenses

                          • Optotune’s focus tunable lenses are shape-changing lenses based on a combination of optical fluids and a polymer membrane. The core element consists of a container, which is filled with an optical liquid and sealed off with a thin, elastic polymer membrane. A circular ring that pushes onto the center of the membrane shapes the tunable lens. The deflection of the membrane and with that the radius of the lens can be changed by pushing the ring towards the membrane or by exerting a pressure to the outer part of the membrane or by pumping liquid into or out of the container.

                            Advantages
                            A change in lens radius of several micrometers can have the same optical effect as moving the entire lens several centimeters. Optical systems can be designed more compact, oftentimes with less lenses and usually with less or no translational movement. Accordingly, there is no more need for expensive mechanical actuators. Less movement also leads to a more robust design, which can be completely closed so that no dust can enter. Furthermore, the materials employed are lighter than glass, saving overall weight. Less movement and weight also means less power consumption and that the response time of systems with tunable lenses can be very low, in the order of milliseconds. Another advantage becomes obvious during production. The fact that less optical parts are moved combined with the tunability of the radius during operation results in reduced tolerance sensitivity and thus higher yield rates.

                            To summarize, these are the five main advantages of focus tunable lenses over traditional optics:
                            • Compact design
                            • Less mechanics
                            • Fast response
                            • Low power
                            • Less tolerance sensitivity
                          • Electroactive polymers

                          • Optotune uses electroactive polymers (EAPs) as an electrostatic actuator for its series of laser speckle reducers. These so-called "artificial muscles" can undergo a large amount of deformation while sustaining large forces. While today's piezoelectric actuators only deform by a fraction of a percent, EAPs can exhibit a strain of up to 380%. There are different types of EAPs. Optotune has specialized in dielectric electroactive polymers (DEAPs) as described below.

                            Advantages
                            DEAPs have many advantages compared to piezoelectric actuators, voice coils or motors:
                            • Large deformation: While a strain of up to 380% has been reached in experiments, the commercially viable DEAPs are in the range of 20%.
                            • High energy efficiency due to the purely electrostatic principle
                            • Moderate bandwidths of a few kilohertz achievable
                            • Large operating temperature range of -100°C to 250°C
                            • Low noise and vibration
                            • A downside is the high voltage required. While DEAPs are typically driven at > 1 kV, Optotune has optimized materials and processes to reach about 15% deformation at 300V.

                            Applications
                            Optotune has specialized in the use of electroactive polymers as an actuator in optical components such as laser speckle reducers, tunable diffraction gratings or tunable phase retarders. The DEAP principle can also be used as sensor or even as a generator. Application examples include electroactive fluid pumps and valves, spring roll actuators in robots, heel-strike generators, a blimp and ultraflat loudspeakers.
                        • Applications

                            • Laser Projection

                              • High-resolution, speckle-free projections
                              • Ultra-compact solution with no mechanics
                              • Low power consumption

                              Lasers are very attractive for projection systems as they offer high contrast, a broad color spectrum and the advantage that images are always in focus. However, lasers do have the inherent problem of speckle: On optically rough surfaces, local interferences occur that manifest themselves as a grainy pattern of spots. This effect causes noise in projected images and reduces the resolution of measurement systems.
                              Optotune offers a unique solution to this problem. Electroactive polymers (so-called artificial muscles) are used to oscillate a diffuser at a high frequency to average out the speckle patterns. This principle is extremely compact, completely free of mechanics and low in power consumption. Optotune’s Laser speckle reducer can be customized in terms of size, frequency, coatings and diffuser structure to fit a variety of applications:
                              • Pico projectors
                              • Business projectors
                              • Cinema projectors
                              • Metrology
                            • Machine Vision

                              • Focus within milliseconds
                              • Large working distance ranges
                              • Easier installation and remote focus control
                              • Long life time (>1B cycles)

                              You would like to inspect your product at different working distances? Or read 2D codes quickly no matter how far away they are?

                              Focus tunable lenses provide a versatile and compact solution with focusing times of only a few milliseconds. As no translational mechanics are involved such systems are robust and achieve billions of cycles. Optotune’s lenses can be combined with off-theshelf imaging lenses by mounting them either in front or at the back. A few example configurations follow, many more can be found in our application notes.

                              Applications:
                              • Quality control (e.g. liquids, electronics, bottles, LCDs, PCBs, CCMs)
                              • Packet sorting
                              • Bar code reading
                              • Robots
                              • 3D image stacking
                            • Ophthalmology

                              • Most compact way to correct refraction
                              • Continuous adjustment in real-time
                              • +/- 20 diopters spherical, +/- 8 diopters cylindrical (Stokes approach)

                              There is no more natural way to compensate for visual defects of the human eye than by using focus tunable lenses, which basically work according to the same principles. Currently, most ophthalmic equipment rely on manual selection and alignment of one or several glass lenses to achieve the desired correction. With focus tunable lenses, correction can be done with one single lens, which can be adjusted continuously and precisely in real-time. Spherical lenses can be built with apertures of up to 40mm and optical power ranging from -20 to +20 diopters.

                              Applications:
                              • Subjective refraction (Phoropters)
                              • Autorefractometers (‚fogging‘)
                              • Perimeters
                              • OCT
                              • Retina imaging
                            • Laser Processing

                              • Large scan field
                              • Large z-range
                              • Compact form factor

                              Precise and fast z-axis control for a large scan volume
                              Optotune’s focus tunable lens with optical feedback is the ideal choice for fast z-axis spot control in laser processing systems, allowing 2.5D and 3D laser processing. The EL-10-42-OF is suitable for the use with ns- or ps-pulsed lasers at 532 and 1064 nm wavelength and power levels of up to 2.6 J/cm2.

                              2.5D laser processing
                              With its compact form factor, the EL-10-42-OF provides a large z-range in combination with standard f-theta lenses for flexible adjustment of the working distance. For example with an f=160 mm f-theta lens, a z-range of 100 mm is reached as illustrated below. As the field flattening is realized with the f-theta lens, an integration of the EL-10-42-OF is a fast, simple process. With an analog signal from the controller card, the EL-E-OF-A drive electronics board controls the EL-10-42-OF precisely along the z-axis, allowing to jump between large z-axis variations at high speed.

                              3D laser processing
                              When integrating the EL-10-42-OF without f-theta lens, additional fixed optics are used in combination with the tunable lens to focus the laser beam onto the processing surface. Then, the EL-10-42-OF controls the z-axis for field flattening as well as for the z-axis, providing true 3D processing. Benefits of this configuration are a larger scan field and typically better optical quality (smaller spot size) than a comparable 2D system. The comparison of two reference designs with similar maximum working distance below shows the larger scan volume without f-theta lens.
                            • Microscopy

                              • Axial focusing over several 100 micrometers within milliseconds
                              • Fast focusing/z-stacking
                              • No vibrations

                              Currently, most focusing solutions rely on mechanical axial movements, which can spoil the specimen. The optical focusing scheme of Optotune’s electrically tunable lenses (ETLs) allow for movement-free axial focusing within milliseconds. The EL-16-40-TC is ideally suitable for microscopy. Depending on the implementation and the optical performance requirements, focusing ranges of 60-1000 microns can be achieved.

                              Optotune's Laser Speckle Reducer offers a compact and effective solution to reduce laser speckle in high intensity illumination. By using a 4-f system, the LSR can be used in combination with multimode fibers.

                              Applications:
                              • Wide-field microscopy
                              • Confocal microscopy
                              • Two-photon fluorescence microscopy
                              • 3D light-sheet microscopy
                              • Transport-of-intensity (TIE) phase microscopy
                              • Quantitative phase contrast in digital holographic microscopy