1. Hamamatsu Photonics

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    1. Mentioned In 16 Articles

    2. In-process monitoring in laser grooving with line-shaped femtosecond pulses using optical coherence tomography

      In-process monitoring in laser grooving with line-shaped femtosecond pulses using optical coherence tomography
      A line-shaped beam is useful for increasing the processing speed in laser grooving and scribing. In laser grooving, depth control of the processed structure is important for performing precise processing. In this paper, in-process monitoring of the depth of a structure formed by femtosecond laser processing with a line-shaped beam using swept-source optical coherence tomography (SS-OCT) was demonstrated. In the evaluation of the SS-OCT system, the depth resolution, measurement accuracy ...
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    3. Light detection module for OCT device and OCT device

      Light detection module for OCT device and OCT device
      A light detecting module that detects interference light that has exited an exit end surface of an optical fiber in an OCT instrument includes: a ball lens including an incident surface entered by the interference light that has exited the exit end surface, and an exit surface exited by the interference light that has entered the incident surface; and a photodiode including a detecting surface entered by the interference light ...
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    4. Stable wavelength-swept light source designed for industrial applications using KTN beam-scanning technology

      Stable wavelength-swept light source designed for industrial applications using KTN beam-scanning technology
      Using light-beam scanning technology based on a potassium tantalate niobate (KTa 1-x Nb x O 3 , KTN) single crystal, we constructed a wavelength-swept light source for industrial applications. The KTN crystal is placed in an external cavity as an electro-optic deflector for wavelength scanning without any mechanical operation. Cavity arrangement and mechanism elements are specially designed for long-term stability and environmental robustness. In addition, we updated the handling of the ...
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    5. OCT device

      OCT device
      A photodetector of an OCT device is provided with: a silicon substrate comprised of a semiconductor of a first conductivity type, having a first principal surface and a second principal surface opposed to each other, and having a semiconductor region of a second conductivity type formed on the first principal surface side; and charge transfer electrodes provided on the first principal surface and transferring generated charges. In the silicon substrate ...
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    6. High-performance adaptive optics system with long-term stability using liquid-crystal-on-silicon spatial light modulator for high-resolution retinal imaging

      High-performance adaptive optics system with long-term stability using liquid-crystal-on-silicon spatial light modulator for high-resolution retinal imaging
      An adaptive optics scanning laser ophthalmoscope (AO-SLO) using a liquid-crystal spatial light modulator was developed. For routine clinical applications, long-term stability of the AO system is very important because unavoidable eye movement may degrade the instrument's performance. We studied the long-term performance of the aberration correction with healthy human eyes. Retinal image acquisition and AO data collection were performed simultaneously for periods of several minutes. We confirmed that, for ...
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    7. Single-shot Full-field reflection phase microscopy

      Single-shot Full-field reflection phase microscopy
      We present a full-field reflection phase microscope that combines low-coherence interferometry and off-axis digital holographic microscopy (DHM). The reflection-based DHM provides highly sensitive and a single-shot imaging of cellular dynamics while the use of low coherence source provides a depth-selective measurement. The setup uniquely uses a diffraction grating in the reference arm to generate an interference image of uniform contrast over the entire field-of-view albeit low-coherence light source. We have ...
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    8. High-Resolution Imaging of the Photoreceptor Layer in Epiretinal Membrane Using Adaptive Optics Scanning Laser Ophthalmoscopy

      High-Resolution Imaging of the Photoreceptor Layer in Epiretinal Membrane Using Adaptive Optics Scanning Laser Ophthalmoscopy
      Objective: To compare, in eyes with an idiopathic epiretinal membrane (ERM), photoreceptor cell structural abnormalities identified on high-resolution images obtained by adaptive optics scanning laser ophthalmoscopy (AO-SLO) with the severity of metamorphopsia and anatomic findings on spectral-domain optical coherence tomography (SD-OCT). Design: Observational case series. Participants: Twenty-five eyes of 24 patients with idiopathic ERM and 20 normal eyes of 20 volunteer subjects. Methods: All participants underwent a full ophthalmologic examination ...
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    9. High-Resolution Imaging of Resolved Central Serous Chorioretinopathy Using Adaptive Optics Scanning Laser Ophthalmoscopy

      High-Resolution Imaging of Resolved Central Serous Chorioretinopathy Using Adaptive Optics Scanning Laser Ophthalmoscopy
      Objective To compare pathologic changes in photoreceptors in eyes with resolved central serous chorioretinopathy (CSC) seen on high-resolution images obtained by adaptive optics scanning laser ophthalmoscopy (AO SLO) with visual acuity (VA) and findings on spectral-domain optical coherence tomography (SD OCT). Design Observational case series. Participants Forty-five eyes of 38 patients with resolved CSC and 20 normal eyes of 20 volunteer subjects. Methods All patients underwent a full ophthalmologic examination ...
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  2. About Hamamatsu Photonics

    Hamamatsu Photonics

    Hamamatsu Photonics.  Broadband Sources, Optical Detectors, & Optical Components.  Hamamatsu Photonics is a Japanese manufacturer of optical sensors (including photomultiplier tubes), electric light sources, and other optical devices and their applied instruments. The company was founded in 1953. It has several oversea affilited companies.