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Hamamatsu Photonics

5th Technology Days

Topics

  • Fresh from the Lab in:

    Analytics and NDT

    Low-dose X-ray imaging (source, imagers)

    Today’s digital flat-panel sensors for medical, dental and NDT applications have reached a size of 40x30 cm, and it has become possible to reduce the X-ray dose two-fold in comparison to film. An additional dose reduction by a factor of 10 is obtained by changing from scintillation-based to direct conversion with suitable semiconductor detectors. In this way we are coming close to the holy grail of medical X-ray imaging: Detecting and counting each incident X-ray photon, while simultaneously knowing its energy.

    Portable X-ray analysis (source, lens, energy-selective sensing) Abstract coming soon

    Portable micro-Raman spectroscopy

    Raman spectroscopy is a sensitive and extremely selective method for non-contact analysis of materials in a wide range of applications, covering medical, environmental, agricultu­ral/food, public safety and quality control applications. Employing the latest achievements in optical systems miniaturization, detector sensitivity improvements and surface-enhanced Raman signal amplification, it has become possible to realize micro-Raman systems with the form factor of smartphones.

    Confocal microscopy module

    Confocal fluorescence microscopy is a powerful tool in the life sciences. Until now, such specialized microscopes were quite expensive and not easy to adapt to novel specifications. Hamamatsu has developed a highly modular confocal microscopy system that is simply attached to a side port of any suitable, commercially available microscopy model. Up to four different fluorescence excitation wavelength modules can be put into a common housing for quasi-simultaneous multi-wavelength confocal fluorescence microscopy measurements.

    Tunable Quantum Cascade Lasers (QCL)

    Abstract coming soon
    Compact FTIR engine for portable NIR/MIR spectroscopy

    The mid-infrared spectral range from about 2 to 12 micrometers is also called “diagnostic spectral range” due to the high specificity of the “spectral fingerprints” that can be acquired for a large variety of materials. To make this technology available for many more applications, Hamamatsu has developed a miniaturized micro-FTIR (Fourier Transform Infra-Red) spectroscopy module, making use of a single, highly integrated micro-mechanical system made with techniques borrowed from semiconductor manufacturing.

     

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  • VCSEL and Beam Steering

    VCSEL and VCSEL array technology Abstract coming soon

    iPMSEL

    Phase-modulating Surface-emitting Laser

    The novel and Hamamatsu-exclusive iPMSEL devices are CGH components which are illuminated with surface-propagating light waves. Small holes (of the order of 100 nm) act as secondary light sources, whose position determines the phase of the emitted “elementary light source”. Since no external light source is required, extremely compact light-pattern generating elements can be realized, with a typical diameter of 1-3 mm.

    Principles of computer-generated holography

    As Nobel Prize winner Dennis Gabor pointed out, any 3D light distribution can be generated by producing a suitable wavefront through manipulation of the 2D phase distribution of a plane wave (at a given wavelength). This is employed in CGH technology, where 2D phase modulation platelets are calculated and produced using techniques borrowed from semiconductor manufacturing. These CGH modules can be used to generate arbitrary and very large light distributions with millimeter-size optical components.

    LCOS - SLM - Spatial Light Modulators

    SLM modules are optical components that are able to generate arbitrary 2D phase distributions and change them at video rate. In this way, it becomes possible to compute “dynamic CGH phase planes” and feed them to such SLM modules for real-time image generation. The power handling capabilities of these SLM modules are so high that they can even be used for laser marking, cutting and machining.

    Micro-mirrors 

    For a long time, the goal in photonics was to replace mechanical elements by electronically-scanned components. The ubiquitous DMD (digital mirror devices) found in many beamer products have changed this thinking. In some applications – not the least LiDAR systems for autonomous cars and robots – mechanical scanning leads to superior system solutions. For these purposes, Hamamatsu has developed a range of very reliable 1D and 2D micromirror modules. Modulation frequency can be as high as 50 kHz, making use of the micro-mirror resonance mode. Major applications include large-area display and time-of-flight 3D cameras.

    Large-area organic LEDs

    The realization that organic materials can exhibit semiconducting properties has led to a flurry of R&D activities in “organic electronics” and “organic photonics” over the past 30 years. In particular, large-area image sensors and light sources (oLEDs) are of high commercial interest, because they can be manufactured by low-cost, large-area (square meters or more) technologies. However, it has proven difficult to produce oPDs and oLEDs with high operational stability – in the past, optoelectronic performance deteriorated after a few hundred hours of continuing operation. Through a novel technological breakthrough, Hamamatsu has been able to produce very stable, high-quality yet low-cost oLEDs with operational lifetimes of many thousand hours.

     

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  • MPPC/ SiPM and 3D Imaging

    Recent advances in MPPC technology Abstract coming soon
    MPPC-on-CMOS
    Multi-channel pulsed laser diode module
    Scanning engine for 3D imaging
    Novel applications of MPPCs and single-photon sensing

     

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