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公开(公告)号：JPS63185084A
公开(公告)日：1988-07-30
申请号：JP1754687
申请日：1987-01-28
Applicant: HAMAMATSU PHOTONICS KK
Inventor： KOBAYASHI YUJI , OBAYASHI YASUSHI , SUZUKI HIDEO , OSUMI YASUTSUGU , MORITA NOBUHIRO , MATSUMOTO OSAMU
Abstract: PURPOSE:To obtain an optical wavelength tunable laser without the large rotary angle of a crystal for an optical wavelength converter, by providing a second optical parametric oscillator having a specified function on the incident side of the optical wavelength converter. CONSTITUTION:When a crystal 6a for a first optical parametric oscillator (OPO) is excited with pumping lights, normal light and anomalous light are emitted when the angle (theta) of the crystal 6a is 90 degrees. Of the output light of the first OPO 1a, the pumping light is inputted into a 1/2 wavelength plate 27, and the direction of the polarized light is turned by 90 degrees. A crystal 6b for a second OPO 1b is provided at a position, which is orthogonally intersected with the crystal 6a for the first OPO. Therefore the pumping light becomes the normal light with respect to the crystal 6b for the second OPO. The phase is aligned with respect to the turning direction in a vertical plane. The signal light and the idler light, whose polarizing directions are orthogonally intersected with the output light of the first OPO 1a, are outputted. The output light from the first OPO 1a and the output light from the second OPO 1b are combined and inputted into an SHG 2. Then the normal light within a specified range with respect to a crystal 9 for the SHG is obtained. Said normal light becomes a wavelength tunable laser beam by the rotation of the crystal 9 for the SHG by 50-90 degrees.
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公开(公告)号：JPS63170619A
公开(公告)日：1988-07-14
申请号：JP255287
申请日：1987-01-08
Applicant: HAMAMATSU PHOTONICS KK
Inventor： KOBAYASHI YUJI , OBAYASHI YASUSHI , SUZUKI HIDEO , OSUMI YASUTSUGU , MORITA NOBUHIRO , MATSUMOTO OSAMU
Abstract: PURPOSE:To obtain a wavelength variable laser beam with high efficiency, and also, a stable oscillation, by enclosing a non-linear optical crystal so as to be turnable in a container, changing the incident angle of an excited light to a crystal axis by turning only this enclosed non-linear optical crystal, and changing the wavelength of an oscillation light. CONSTITUTION:A third harmonic laser beam (wavelength lambdap=355nm) of an Nd-YAG laser is inputted as the excited light 35, an oscillation light 36 consisting of a signal (wavelength lambdas) and an idler (wavelength lambdai) is generated by an optical parametric oscillation. When the incident angle of the excited light 35 to a crystal axis is changed by turning a non-linear optical crystal 24 around the center axis 37 in the direction as indicated with an arrow by driving a stepping motor 14, the wavelengths (lambdas, lambdai) of the oscillation light 36 are changed continuously within a prescribed range (for instance, 500-1,230nm). In such a way, a distance between mirrors 31, 32 (cavity length) can be made as short as possible, and a stable oscillation light can be obtained with high efficiency.
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公开(公告)号：JPS63159832A
公开(公告)日：1988-07-02
申请号：JP31007386
申请日：1986-12-24
Applicant: HAMAMATSU PHOTONICS KK
Inventor： SUZUKI HIDEO , OSUMI YASUTSUGU , MORITA NOBUHIRO , MATSUMOTO OSAMU , KOBAYASHI YUJI , OBAYASHI YASUSHI
Abstract: PURPOSE:To simultaneously output two laser beams of independent and variable wavelength by providing two optical parametric oscillators along the optical axis of an excitation light, and controlling the rotary angle of each non-linear optical crystal. CONSTITUTION:When a wavelength selecting signal is sent out to optical parametric oscillators 24, 25 through lines l1, l2 from a wavelength selecting circuit 45, the rotary angle of rotary shafts 30 and 32, and that of 40 and 42 are controlled to a prescribed angle respectively, and a phase matching angle of a non-linear optical crystal 31, and that of a non-linear optical crystal 41 are set to theta1 and theta2, respectively. Therefore, the oscillator 24 oscillates an optical parametric by the excitation light 22 of wavelength lambdap from a laser oscillator 21, and outputs the light beam 47 of lambda1s and lambda1i. Also, the oscillator 25 uses the transmission light of wavelength lambdap contained in the light beams 47, as an excitation light, executes a parametric oscillation through a collimator lens 37, and outputs the light beams 48 of wavelength lambda2s and lambda2i corresponding to the angle theta2. Also, in the output side of a filter 26, the light beams 49 of wavelength lambda1s and lambda2s appear simultaneously.
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公开(公告)号：JP2005158886A
公开(公告)日：2005-06-16
申请号：JP2003392703
申请日：2003-11-21
Applicant: Hamamatsu Photonics Kk , 浜松ホトニクス株式会社
Inventor： MATSUMOTO OSAMU , KAWASHIMA TOSHIYUKI , KANABE TADASHI
Abstract: PROBLEM TO BE SOLVED: To provide an optical amplifier which can protect an excitation light source even if a solid-state laser medium is broken. SOLUTION: The excited light beams emitted from the excitation light sources 32a, 32b are radiated to a solid-state laser medium 31 passing through optical guides 36a, 36b and windows 35a, 35b. With radiation of the excited light beam to the solid-state laser medium 31, the light beam of the predetermined wavelength is amplified in the solid-state laser medium 31. If the windows 35a, 35b are broken resulting in the flooding of the cooling water, the excitation light sources 32a, 32b accommodated in the light source accommodating portions 34a, 34b are never contaminated with the cooling water. COPYRIGHT: (C)2005,JPO&NCIPI
Abstract translation: 要解决的问题：提供即使固体激光介质破裂也能保护激发光源的光放大器。 解决方案：从激发光源32a，32b发射的激发光束照射到通过光导36a，36b和窗口35a，35b的固态激光介质31中。 通过将激发的光束照射到固态激光介质31，在固体激光介质31中放大预定波长的光束。如果窗口35a，35b被破坏，导致冷却水的溢流 容纳在光源容纳部分34a，34b中的激发光源32a，32b不会被冷却水污染。 版权所有（C）2005，JPO＆NCIPI
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35.发明专利
公开(公告)号：JPH07171104A
公开(公告)日：1995-07-11
申请号：JP31812093
申请日：1993-12-17
Applicant: HAMAMATSU PHOTONICS KK
Inventor： KATO TAKAHITO , MATSUMOTO OSAMU
Abstract: PURPOSE:To provide outer diameter measuring equipment capable of measuring an outer diameter at high speed with non-contact. CONSTITUTION:The image of a circle to be measured is formed on a prescribed imaging surface by an optical means 11. A plurality of one-dimensional measuring means 14, 15 are arranged on the imaging surface to measure at least three points on the circumference of the image of the circle to be measured. The diameter of the circle to be measured is determined from the coordinates of the three points measured by the one-dimensional measuring means 14, 15 by an arithmetic means 25.
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Patent Agency Ranking
公开(公告)号：JPH0682230A
公开(公告)日：1994-03-22
申请号：JP23181492
申请日：1992-08-31
Applicant: HAMAMATSU PHOTONICS KK
Inventor： HORI TERUSHIGE , KOBAYASHI YUJI , TOYODA HARUYOSHI , MATSUMOTO OSAMU , SONE AKIHIRO , HARA TSUTOMU
Abstract: PURPOSE:To detect a two dimensional phase modulation at a high speed by using an optical parallel processing art. CONSTITUTION:Interfering devices 8, 10 and 12 causes a two dimensional signal light containing phase information to interfere with a reference light having a spherical wave front. A spatial light modulator 18 generates a reference light pattern. The reference light pattern changes with time in the direction of a radius vector corresponding to a spherical wave in response to a signal from an arithmetic device 16. An SLM 14 and a camera 28 perform a two-dimensional optical computation of change with time of overlap of the signal pattern and the reference pattern in corresponding area. Variation and the direction of a phase can be determined in respective areas of the two dimensional signal light from the period of the change with time of overlap between the signal pattern and the reference pattern in the corresponding area and the time intervals between the peaks thereof. In this case, as the reference pattern becomes concentric, the direction of shift in phase of the two-dimensional signal light can be judged immediately depending whether the distortion of the signal pattern is inward or outward.
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公开(公告)号：JPH05322648A
公开(公告)日：1993-12-07
申请号：JP13364492
申请日：1992-05-26
Applicant: HAMAMATSU PHOTONICS KK
Inventor： MATSUMOTO OSAMU
Abstract: PURPOSE:To realize measurement for a plurality of wavelengths. CONSTITUTION:The solid streak camera comprises a polarizer 102, an aperture 103, an optical deflector 104, a Fourier transform lens 105, and an image sensor 106, as an optical system for optical pulse detecting means, and comprises a controller 121 and a high voltage circuit 123 as a control system for the optical pulse detecting means. A pulse light P incident on the optical deflector 104 is deflected and collected by means of the Fourier transform lens 105. It is then dispersed through a dispersion prism 107 and focused on the image sensor 106.
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公开(公告)号：JPH05113365A
公开(公告)日：1993-05-07
申请号：JP24159491
申请日：1991-09-20
Applicant: HAMAMATSU PHOTONICS KK
Inventor： MATSUMOTO OSAMU
Abstract: PURPOSE:To enable a time resolution to be improved. CONSTITUTION:A polarizer 102, an aperture 103, a light deflector 104, a Fourier transformation lens 105, and an image sensor 106 are provided as the optical system of a solid-state streak camera, a spherical surface lens 101a, a flat- cylindrical lens 101b, and a cylindrical lens 101c are provided as a beam shape changing means 101, and a controller 121 and a high-voltage circuit 123 are provided as the control system. A pulse beam PL is changed to an elliptical shape by the beam shape changing means 101, it is subjected to Fourier transformation by the Fourier transformation lens 105 for converging light so that the light spot 109 is of elliptical shape whose major axis is vertical to the scanning direction and the time resolution can be improved.
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公开(公告)号：JPH04212009A
公开(公告)日：1992-08-03
申请号：JP21313490
申请日：1990-08-10
Applicant: HAMAMATSU PHOTONICS KK
Inventor： HAYASHI AKITAKE , MATSUMOTO OSAMU , HARA TSUTOMU , KOBAYASHI YUJI , FUJITA KATSUYOSHI
Abstract: PURPOSE:To obtain a displacement detector which is simply structured, compact and light-weighted to enable highly accurate displacement detection by providing a movable member directing a predetermined direction around a rotation axis, a rotatable container and a limiting member for limiting a rotatable region within a predetermined movable region. CONSTITUTION:When difference in outputs from a light detector 15 is a predetermined value or higher, a shift of a float 8 from a reference position is determined while a direction of the shift of the float 8 from the reference position can be identified depending on whether the difference in outputs is positive or negative. A control circuit 16 drives a servo motor 2 according to the result, to rotate a container 4 in a direction where the float 8 has shifted. When difference in outputs from the light detector 15 is a predetermined value or lower, the circuit 16 stops the motor 2 to stop rotation of the container 4. As a result, the float 8 again returns to the reference position with respect to the container 4. If a rotation amount of the container 4 is monitored by a rotation encoder 18, the rotation amount of an entire displacement detector, that is, angular displacement can be detected.
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公开(公告)号：JPH0322070B2
公开(公告)日：1991-03-26
申请号：JP1580487
申请日：1987-01-26
Applicant: HAMAMATSU PHOTONICS KK
Inventor： KOBAYASHI JUJI , OOHAYASHI YASUSHI , SUZUKI HIDEO , OOSUMI YASUTSUGU , MORITA NOBUHIRO , MATSUMOTO OSAMU
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