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1. 发明专利

JPS6284655A IMAGE READER 失效
公开(公告)号：JPS6284655A
公开(公告)日：1987-04-18
申请号：JP22361385
申请日：1985-10-09
申请人： HITACHI LTD , HITACHI MEDICAL CORP
发明人： HORIUCHI HIDEYUKI , SHINPO CHIAKI , YOKOUCHI HISATAKE , SUZUKI RYUICHI
IPC分类号： H04N1/04 , H04N1/12
摘要： PURPOSE:To reduce the size of a light convergence system by providing two plane light reflecting mirrors which are arranged perpendicularly to a photoscanning direction and also at right angles to an optical fiber. CONSTITUTION:The plane reflecting mirrors 10 and 11 are arranged perpendicularly to a photoscanning surface and also at right angles to the optical fiber. Scattered light from a film passes through a cylindrical lens 6 and then the majority of it is image-formed directly on the incidence end of the optical fiber 7. The cylindrical lens 6 has no lens operation in the photoscanning direction, so luminous flux reflected by a plane reflecting mirror travels to a position symmetrical to the plane reflecting mirror in the same way with the absence of the plane reflecting mirror. Therefore, the optical fiber 7 operates equivalently to an optical fiber 7'. Consequently, the optical fibers are reduced.

2. 发明专利

JPS6326156A FILM PICTURE READER 失效
公开(公告)号：JPS6326156A
公开(公告)日：1988-02-03
申请号：JP16951786
申请日：1986-07-18
申请人： HITACHI MEDICAL CORP
发明人： HORIUCHI HIDEYUKI , SHINPO CHIAKI , ONODERA YOICHI
IPC分类号： G02B27/00 , H04N1/04 , H04N1/113 , H04N5/253
摘要： PURPOSE:To possibly approach a measured density to a diffused light density by providing a light slit suppressing a re-reflection on a film and a light diffusing plate between the film and a light collecting system. CONSTITUTION:A long light slit 7 in a linear light scanning direction is provided between an X-ray film 3 and a transmission type light diffusing plate 4. The light slit 7 is to prevent the light diffused by the transmission type light diffusing plate 4 from being reflected again on the X-ray film while being returned on the film 3. As the transmission type light diffusing plate 4, an oval plate or an acrylic resin made opaque plate is used. Thus, the emasured density is made approached to the diffused light density and the dynamic range required for the light detection system is made narrower.

3. 发明专利

JPS634770A IMAGE INPUT DEVICE 失效
公开(公告)号：JPS634770A
公开(公告)日：1988-01-09
申请号：JP14694586
申请日：1986-06-25
申请人： HITACHI MEDICAL CORP
发明人： HORIUCHI HIDEYUKI , SHINPO CHIAKI , ONODERA YOICHI
IPC分类号： H04N1/21 , G06T3/40 , H04N1/387
摘要： PURPOSE:To thin optionally pixels by providing an image thinning means to prepare for and circulate a shift register having a designated bit pattern and extract the pixel only when a shift register output is '1'. CONSTITUTION:The data from a thinning data memory 13 are set with an HS signal to a shift register 14. Each time a clock signal CLK is generated, the data in the shift register 14 are circulatively shifted bit by bit. When an AND circuit 15 is selected by a clock selection and the output of the shift register 14 is '1', an address counter 12 is counted up through an OR circuit 17, a signal selecting circuit 9 functions, one-dimensional image sensor signal data are selected and stored into an image memory 10. When the output of the shift register 14 is '0' and the output of an one-dimensional image sensor 4 is generated, image data are not stored into the image memory 10. Thus, by setting the bit pattern of the shift register in accordance with the size of the image memory, a suitable thinning processing is executed.

4. 发明专利

JPS62238415A OUTPUT PHASE CORRECTION CIRCUIT FOR ROTARY ENCODER 失效
公开(公告)号：JPS62238415A
公开(公告)日：1987-10-19
申请号：JP8264386
申请日：1986-04-09
申请人： HITACHI MEDICAL CORP
发明人： ONODERA YOICHI , HORIUCHI HIDEYUKI , SHINPO CHIAKI
IPC分类号： G01D5/36 , G01D5/244 , G01D5/245 , G05D3/12 , H02P29/00
摘要： PURPOSE:To detect an angle of rotation with high accuracy by only adding a simple circuit, by applying phase modulation to the output of an encoder on the basis of the correction data of the positional variation error read from a memory means. CONSTITUTION:The pulse outputted from a rotary encoder 1 is counted by a counter 2 reset by a zero signal Zero at each time when the encoder 1 makes one revolution. The correction data of a positional variation error due to eccentricity flows out from ROM3 on the basis of the count value of the counter 2. This data is supplied through a D/A converter 4 and an amplifier 11, etc. and the pulse train outputted from the encoder 1 corresponding to an angle is subjected to phase modulation to correct the error. Therefore, by only adding a simple correction circuit, the angle of rotation can be detected with high accuracy.

5. 发明专利

JPS634769A PHOTO DETECTOR 失效
公开(公告)号：JPS634769A
公开(公告)日：1988-01-09
申请号：JP14694486
申请日：1986-06-25
申请人： HITACHI MEDICAL CORP
发明人： SHINPO CHIAKI , HORIUCHI HIDEYUKI , SUZUKI RYUICHI
IPC分类号： H04N1/04 , H04N1/12
摘要： PURPOSE:To enlarge a focusing angle, to facilitate manufacturing, to miniaturize a device and to guide equally light to a photo detector with a small photodetecting area by providing a light guiding circular truncated cone-shaped member between a flexible light guiding body and the photo detector. CONSTITUTION:A laser light to transmit and scatter a film 5 is made incident on a light guiding plate material 6, repeats the total reflection in an inner surface and is guided to a emitting edge. The light flux to emit the light guiding plate material is made incident on a light fiber flux 7 opposite to the light flux and arranged linearly. The emitting edge of the light fiber flux 7 is arranged to a circular shape, the light flux to emit the light fiber flux 7 is made incident on a light guiding circular truncated cone-shaped member 8 opposite to the light flux and arranged, focused by the member 8 and converted to an electric signal by a light detecting device 9 at the emitting edge. Since the total reflection at the inner surface is used by the member 8, a reflecting ratio is large and a transmission efficiency comes to be large compared with the circular cone with a metal. Since the change of the emitting light quantity distribution from the fiber flux can be made smaller, the influence of the sensitivity distribution on the detecting device surface can be decreased.

6. 发明专利

JPS62189402A OPTICAL FIBER BUNDLE 失效
公开(公告)号：JPS62189402A
公开(公告)日：1987-08-19
申请号：JP3088086
申请日：1986-02-17
申请人： HITACHI MEDICAL CORP
发明人： SHINPO CHIAKI , HORIUCHI HIDEYUKI
IPC分类号： G02B6/42 , G02B6/04 , G02B26/10 , G02B26/12
摘要： PURPOSE:To adjust easily an optical system, even in case of an optical fiber bundle whose width is narrow in the direction vertical to the light scanning direction, by curving an array of an incident end to match a locus of a scanning line of a luminous flux. CONSTITUTION:In case a reflecting surface of a polyhedron mirror 2, and a revolving shaft of a driving motor are not parallel, a locus 9 of a luminous flux which has been scanned does not become a straight line but curved. Also, in case an ftheta lens 3 is inclined against an optical axis, or when a mirror 4 for curving an optical path has been used on the way, as well, a scanning line is curved in the same way. Therefore, an incident end fixing member 7 of a fiber bundle is curved to match a locus of the luminous flux, and it is made to coincide roughly with a curve of a locus of a scanning light. In this way, even in case of an optical fiber bundle whose photodetecting area is small, an adjustment accuracy for attaching an optical element, etc. can be relaxed, and the time for an adjustment work of a complicated optical system can be shortened.

7. 发明专利

JPS638144A FILM FEED MOTION 失效
公开(公告)号：JPS638144A
公开(公告)日：1988-01-13
申请号：JP14694686
申请日：1986-06-25
申请人： HITACHI MEDICAL CORP
发明人： ONODERA YOICHI , HORIUCHI HIDEYUKI , SHINPO CHIAKI
IPC分类号： B65H5/16 , G03B1/18 , H04N1/00
摘要： PURPOSE:To aim at improvement in feeding accuracy and secureness in safety of a film, by installing a guide along a locus being described by one point of an arm by rotation of a rotating machine. CONSTITUTION:A film 17 is pushed of its rear edge by the arm 7 clamped to a turning shaft of a rotating machine 6 and fed to the inside of a guide 8 which protects the film inside and makes it smoothly operate. This guide 8 is formed into a form along a locus by rotation of the arm 7, namely, into a circular arc centering on the turning shaft of the rotating machine 6. At a point of time when a part of the film 17 traverses a sensor 11, film feeding is started. The arm 7 rotates so as to prevent laser beam scanning by a rotary polygone mirror 3 and a lens 4, and since it extrudes the film 17 to the last, smooth film feeding motion and full reading both are quaranteed.

8. 发明专利

JPS62170905A CONDENSING DEVICE 失效
公开(公告)号：JPS62170905A
公开(公告)日：1987-07-28
申请号：JP1193086
申请日：1986-01-24
申请人： HITACHI MEDICAL CORP
发明人： SHINPO CHIAKI , HORIUCHI HIDEYUKI , SUZUKI RYUICHI
IPC分类号： G02B6/04
摘要： PURPOSE:To reduce the size of the whole device by using an optical guide plate for condensing measured light reflected from an object and using optical fiber flux for guiding light to a photodetector. CONSTITUTION:A transparent and photoconductive plate made of plastic, e.g. acrylic resin, can be used for the optical guide plate 6. A large condensing angle can be obtained by arranging the optical guide plate 6 adjacently to a film 5 within a contactless range and the length of the optical guide plate 5 is determined so that the light beam transmitted through the film is sufficiently expanded as compared with the diameter of an optical fiber strand in accordance with the converging angle of an ftheta lens 3. Inexpensive plastic fibers can be used for the optical fibers, the incident end surface of the optical fiber flux is ground and tightly sticked to the outgoing end surface of the optical guide plate 6 to guide a light beam. When necessary, the optical fiber flux 7 can be bent. Consequently, the size of the whole device can be reduced.

9. 发明专利

JPS62137973A FILM READER 失效
公开(公告)号：JPS62137973A
公开(公告)日：1987-06-20
申请号：JP28142485
申请日：1985-12-11
申请人： HITACHI MEDICAL CORP
发明人： HORIUCHI HIDEYUKI , YOKOUCHI HISATAKE , SHINPO CHIAKI , MOTOIKE JUN , ONODERA YOICHI
IPC分类号： H04N1/407 , G03B42/02 , H04N1/40
摘要： PURPOSE:To accurately correct the density by processing the inaccuracy of density correction, which is a problem by presence/absence of a film, on a basis of the same light diffusing pattern as the film or a film having a certain density approximating it. CONSTITUTION:An output SIG of a photodetector is converted to digital data, and a switch S1 is turned ON while a laser luminous flux scans an opaque target in the initial stage of each laser scanning. An adder 20, a photodetection system offset data memory 21, and a register 22 are used to perform the summing average processing, and a photodetection system offset average value is obtained. Next, a switch S2 is turned ON, and the photodetection system offset average value is subtracted from the output of a photodetector by a subtractor 23 to terminate offset correction of the photodetection system. The density correction processing is performed on a basis of the same light diffusing pattern as the film or a film having a certain density approximating it through switches SW1-SW4 to correct the density accurately.

10. 发明专利

JPS62193365A PICTURE READER 失效
公开(公告)号：JPS62193365A
公开(公告)日：1987-08-25
申请号：JP3293386
申请日：1986-02-19
申请人： HITACHI MEDICAL CORP
发明人： HORIUCHI HIDEYUKI , YOKOUCHI HISATAKE , SHINPO CHIAKI , ONODERA YOICHI
IPC分类号： H04N1/407 , G03B42/02 , G06K9/20 , G06T1/00 , H04N1/04 , H04N1/12 , H04N1/19 , H04N1/40
摘要： PURPOSE:To reduce the influence of noise by reducing the light unevenness on a film by an optical fiber and a light diffusing plate and reducing the noise component by the output of a CCD one-dimensional line sensor and the correlative double sampling method and providing a signal correcting circuit part with a means which adds and averages white-and-black correcting data. CONSTITUTION:A light diffusing plate 6 is inserted between the exit end of an optical fiber 5 and an X-ray film 7 to reduce the spatial light variance of the quantity of projected light. The light transmitted through and diffused by the X-ray film 7 passes an optical mirror 9 to focus a film image on a CCD one-dimensional line sensor 12 by a focusing lens 10 and is converted to an electric signal proportional to the intensity of light. An optical output monitor signal detected by a photodetector 18 passes an amplifier 19 and an AD converter 20 to obtain a digital signal REF. A signal correcting circuit 21 performs various corrections and logarithmic conversion with AD-converted digital signal SIG and REF to obtain correct X-ray film density information, and this information is stored in a picture memory and is outputted to a CRT display device 23 or the like as required.

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