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公开(公告)号：DE19983767T1
公开(公告)日：2001-11-22
申请号：DE19983767
申请日：1999-11-22
Applicant: HAMAMATSU PHOTONICS KK
Inventor： NAKASE SHIGEKI , KAWAI TAKAAKI , TOZUKA HIROMICHI , HIRAYANAGI MICHITO
Abstract: A driving system region which is a region where a light projector, a light receiver, and a signal processing circuit are installed together is disposed on one side of an optical system region comprising a light-projecting region and a light-receiving region, so that wires such as their mutual signal lines are kept from passing through the optical system region, whereby an omnidirectional distance detecting apparatus capable of complete 360-degree omnidirectional distance detection can be obtained. The influence of electric noise caused by the driving system of rotary mechanism and the like upon light-receiving signals and the like is suppressed, whereby the accuracy in distance detection can be improved.
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公开(公告)号：AU1186100A
公开(公告)日：2000-06-13
申请号：AU1186100
申请日：1999-11-22
Applicant: HAMAMATSU PHOTONICS KK
Inventor： NAKASE SHIGEKI , KAWAI TAKAAKI , TOZUKA HIROMICHI , HIRAYANAGI MICHITO
Abstract: A driving system region which is a region where a light projector, a light receiver, and a signal processing circuit are installed together is disposed on one side of an optical system region comprising a light-projecting region and a light-receiving region, so that wires such as their mutual signal lines are kept from passing through the optical system region, whereby an omnidirectional distance detecting apparatus capable of complete 360-degree omnidirectional distance detection can be obtained. The influence of electric noise caused by the driving system of rotary mechanism and the like upon light-receiving signals and the like is suppressed, whereby the accuracy in distance detection can be improved.
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公开(公告)号：JPH07297493A
公开(公告)日：1995-11-10
申请号：JP9153194
申请日：1994-04-28
Applicant: HAMAMATSU PHOTONICS KK
Inventor： NAKASE SHIGEKI , KAWAI TAKAAKI
Abstract: PURPOSE:To provide a light-emitting device in which stable control for a constant light output can be performed. CONSTITUTION:Since a wavelength selecting filter 80 is provided in the front face of the light-receiving surface of a light-receiving element 50, only emitted light from the light-emitting element selectively passes through the wavelength selecting filter 80 to be incident upon the light-receiving element 50. When the disturbance light of wavelength different from the wavelength of the emitted light enters a package 60, the disturbance light is cut off by the wavelength selecting filter 80, and therefore it is not incident upon the light-receiving element 50. Accordingly, since almost all of of the disturbance light which enters the package 60 are not incident upon the light-receiving element 50, almost normal control for a constant light output can be performed even when the disturbance light enters the package 60.
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公开(公告)号：JPH0497572A
公开(公告)日：1992-03-30
申请号：JP21561590
申请日：1990-08-15
Applicant: HAMAMATSU PHOTONICS KK
Inventor： KAWAI TAKAAKI , NAKASE SHIGEKI , IZAWA TOSHIYUKI
Abstract: PURPOSE:To stabilize the operating condition of an optical device by disposing a temperature sensor between an optical device and a cooling device. CONSTITUTION:A slit 18 is formed through a spacer 14 from top to bottom and the bottom surface of an optical deice 16 is exposed. A temperature sensor 20 is disposed in the slit 18 in contact with the side of the optical device 16. Since the temperature sensor 20 is placed between the optical device 16 and a Peltier device 12, it is less affected by changes in the temperature of the environment in which the optical device 16 is being used and detects only the temperature of the optical device 16 with great accuracy. According to these detection values, it is possible to control the Peltier device 12 through a tempera ture control circuit 22 in order to maintain the optical device 16 at a constant temperature and reduce changes in detection performance with being little affected by the surrounding environment.
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公开(公告)号：JPH0244198A
公开(公告)日：1990-02-14
申请号：JP19484488
申请日：1988-08-04
Applicant: HAMAMATSU PHOTONICS KK
Inventor： KAWAI TAKAAKI , NAKASE SHIGEKI , NAKAMURA SHIGEYUKI
Abstract: PURPOSE:To provide an accurate sensing of a passing position of a flying object by a method wherein at least two photodetectors are provided, light emitting elements are lit in time sharing basis and a timing of detection by the use of the photodetectors corresponds with a timing of illuminatioin of the light emitting elements. CONSTITUTION:When a light emitting diode LEDvz is lit in a time sharing basis, a photo-diode PDv does not receive any light signal to detect a ball 1. At this time, it is judged that there is a ball and then i=a is stored in a memory as a counted value (i). Then, as another counted value (j), a value of j=1 is set. Subsequently, a light emitting diode LEDhj is lit in a time sharing basis. When it is judged that there is a ball, i.e. the light emitting diode LEDhb is lit in a time sharing basis, the ball is detected by the photo-diode PDh, the value j=b which is a counted value (j) is stored in a memory Then, a position of the ball 1 is calculated in response to the counted values i=a and j=b stored in the memory.
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Patent Agency Ranking
公开(公告)号：JP2000162318A
公开(公告)日：2000-06-16
申请号：JP33307298
申请日：1998-11-24
Applicant: HAMAMATSU PHOTONICS KK
Inventor： NAKASE SHIGEKI , KAWAI TAKAAKI , TOTSUKA HIROTOMO , HIRAYANAGI MICHIHITO
Abstract: PROBLEM TO BE SOLVED: To provide an all direction distance detector capable of accurately detecting a distance at 360 degrees. SOLUTION: A driving region R1 of a region for installing all a light emitting unit 2, a light receiving unit 3 and a signal processor 5 is provided at one side of an optical region R2 having a light emitting region R2a and a light receiving region R2b. Thus, signal lines or the like between the regions R2a and R2b do not pass through the region R2 to provide an all direction distance detector capable of completely detecting all direction distances at 360 degrees. Thus, since a distance of wirings is shortened, an influence of an electric noise to a light receiving signal or the like caused by a driving system or the like of a rotating mechanism is suppressed, thereby improving an accuracy of detecting the distance.
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公开(公告)号：JPH06334247A
公开(公告)日：1994-12-02
申请号：JP11850593
申请日：1993-05-20
Applicant: HAMAMATSU PHOTONICS KK
Inventor： NAKASE SHIGEKI , KAWAI TAKAAKI
Abstract: PURPOSE:To realize stabilized drive control of the output power from a semiconductor laser by providing a charge amplifier for integrating and outputting the detection output from a light receiving element thereby allowing detection of the power of pulse light with high S/N ratio using a sample & hold circuit having matched timing. CONSTITUTION:In the drive control circuit for semiconductor laser, pulse light from the semiconductor laser is detected by a light receiving element and the detection output is integrated by a charge amplifier 130 and outputted from a charge amplifier 130. A sampling pulse generating circuit 140 generates a sampling pulse from the rising of output from the charge amplifier 130 and provides a sampling timing to a sample & hold circuit U7. Output from the sample & hold circuit U7 corresponds to the power of pulse light and fed back a voltage control circuit 120 thus controlling the voltage to be applied to the semiconductor laser.
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公开(公告)号：JPH08219874A
公开(公告)日：1996-08-30
申请号：JP2513595
申请日：1995-02-14
Applicant: HAMAMATSU PHOTONICS KK
Inventor： NAKASE SHIGEKI , KAWAI TAKAAKI , NAKAMURA SHIGEYUKI
Abstract: PURPOSE: To provide a solid body photographing apparatus with which images with high precision can be taken and which is miniaturized CONSTITUTION: Based on basic clock signals sent out from an oscillator 130, a AN timing producing circuit 140 produces a photographing instruction signal synchronously with the basic clock and at the same time produces a switching instruction signal for a switching electric power source part 200. The switching instruction signal is transmitted to the switching electric power source part 200. Further, the timing producing circuit 140 produces a sampling instruction signal to instruct the sampling of read out photodetection signals. The sampling instruction signal becomes significant only at the time when high frequency noise generated by the electric power source part 200 at the time of the switching operation is sufficiently damp and also the photodetection signal read out of a photographing element 110 becomes sufficiently stable and A/D conversion of the photodetection signal is carried out according to the sampling instruction signal, so that the intensity of input light detected by the photographing element 110 can be obtained at high precision.
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公开(公告)号：JPH0239618A
公开(公告)日：1990-02-08
申请号：JP18928888
申请日：1988-07-28
Applicant: HAMAMATSU PHOTONICS KK
Inventor： NAKAMURA SHIGEYUKI , NAKASE SHIGEKI , KAWAI TAKAAKI
Abstract: PURPOSE:To output only pulse signal light under a state in which the influence of background light is removed by once storing a detected signal corresponding to incident light including the background light in a capacitor and keeping a switching means in an ON state during a period in which no pulse signal light is entered. CONSTITUTION:When the signal light to be outputted from a light emitting diode LED is under a state represented in a figure (a), and the background light is under a state represented in a figure (b), respectively, the level of the incident light to be entered in a photodiode PD becomes that in a figure (c), and the waveform of the output of an amplifying circuit 2 also becomes the same as the waveform of the incident light. The output (the detected signal) of this amplifying circuit 2 is stored in a capacitor C, and during the period in which no pulse signal light is entered, the electrode between the output terminals of the capacitor C is grounded, and no output appears to an output terminal(OUT) while a switch SW is under the ON state as shown in a figure (d). Thus, since the level of the detected signal is made into reference level immediately before the pulse signal light rises, only the pulse signal light can be outputted under the state in which the influence of the background light is removed.
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公开(公告)号：JPH10339605A
公开(公告)日：1998-12-22
申请号：JP15122497
申请日：1997-06-09
Applicant: HAMAMATSU PHOTONICS KK
Inventor： NAKASE SHIGEKI , SUGIURA MINAYOSHI , KAWAI TAKAAKI
IPC: G01B11/00
Abstract: PROBLEM TO BE SOLVED: To provide an optical range finder wherein a distance from a to-be- measured object is measured accurately, independent of distance from a measurement position to the to-be-measured object. SOLUTION: A measurement part is provided with a light source 2, a light projection side lens 4, a light projection side mirror 3, a photo-detector 7 a light detection side lens 5, and a light detection side mirror 6. Between the light projection side mirror 3 and the light detection side mirror 6, a motor 11 which rotates the light projection side mirror 3 and the light detection side mirror 6 in one body, an encoder 12 for detecting the rotation angle, and a bearing mechanism 13 for lessening a friction against an external case 8 at rotation are provided. The light detection side mirror 6 comprises a flat plate mirror 9 and a concave mirror 10, while the flat plate mirror 9 is larger than the concave mirror 10 in area. The concave mirror 10 is T-shape, with its thickness becoming larger when going down the T-shape, and is fixed to a reflection surface of the flat plate mirror 9.
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