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1. 发明专利

JPH0686082A IMAGE READER 失效
公开(公告)号：JPH0686082A
公开(公告)日：1994-03-25
申请号：JP23560492
申请日：1992-09-03
申请人： RICOH KK
发明人： TAKASE OSAMU , KANEKO YUTAKA , JUMONJI HIROMICHI
IPC分类号： H04N1/04 , H04N1/46
摘要： PURPOSE:To provide an image reader which can obtain the faithful read output of the original surface information by correcting effectively the read color variance of each color component caused by the color aberration of the main scanning direction of an image forming lens through the signal processing. CONSTITUTION:An image reader scans the surface of an original and supplying the light transmitted through or reflected on the original surface after condensing the light through an image forming lens 1. Then the electric signal accordant with the reflection or transmission factor on the original surface is detected as an image signal. This detected image signal is led to a signal processing part 3 for the red, blue and green components. Thus the color image information is obtained. A reading position error correcting circuit 16 which contains a digital filter means whose parameter changes in the main scanning direction X and also defines the setting of the parameter as approximately the adverse weight in regard of a space position is connected to the next stage of the part 3 for the red and blue signal components.

2. 发明专利

JPH04114573A IMAGE PICKUP DEVICE 失效
公开(公告)号：JPH04114573A
公开(公告)日：1992-04-15
申请号：JP23513490
申请日：1990-09-04
申请人： RICOH KK , NIPPON TELEGRAPH & TELEPHONE
发明人： KANEKO YUTAKA , KAMIHIRA KAZUTAKE , KOMIYA KAZUMI
IPC分类号： H04N5/335 , H04N5/361
摘要： PURPOSE:To average the distribution of a light quantity by providing a correction means correcting the nonuniformity of the distribution of the light quantity which is made incident on a solid state image pickup element between an image pickup lens and the solid state image pickup element. CONSTITUTION:A light quantity distribution correction filter 6 whose transmittance (corresponding to the ridge line of square cone prism mirror) toward outside from lines which pass through a center and which are orthogonal is arranged between the image pickup lens 2 and the square cone prism mirror 5. The center of the light quantity distribution correction filter 6 is arranged on the optical axis of the image pickup lens 2 and the lines which pass through the center and which are orthogonal are adjusted to the ridge line of the reflecting surface of the square cone prism mirror 5. Thus, the light quantity at the peripheral end of a picture (original) can considerably be reduced and the deterioration of the light quantity in the center is small compared to that at the peripheral end. Thus, the distribution of the light quantity which is made incident on the image pickup element can be averaged.

3. 发明专利

JPH0251188B2 失效
公开(公告)号：JPH0251188B2
公开(公告)日：1990-11-06
申请号：JP15128279
申请日：1979-11-21
申请人： RICOH KK
发明人： KANEKO YUTAKA
IPC分类号： G02B26/10 , B41J2/44 , G02B27/00 , G03G15/04

4. 发明专利

JPS6475905A MINUTE ANGLE MEASURING MACHINE 失效
公开(公告)号：JPS6475905A
公开(公告)日：1989-03-22
申请号：JP23411787
申请日：1987-09-18
申请人： RICOH KK
发明人： KANEKO YUTAKA
IPC分类号： G01B11/26
摘要： PURPOSE:To measure the minute angle in the two direction of orthogonal two axes accurately at the same time, by measuring an angle as a plane with an area sensor, and performing angle measurement by the analysis of an interference fringe pattern by using a fringe scanning method. CONSTITUTION:A laser beam, which is outputted from a laser light source 11, is made to be parallel luminous flux which is expanded with a beam expander 12. The luminous flux is split into two luminous fluxes through a beam splitter 13. Of these luminous fluxes, the luminous flux which is split into the reflecting direction is reflected with a reference reflecting mirror 14, transmitted through the splitter 13 and inputted into a CCD camera 15 of an area sensor. Meanwhile, the luminous flux which is split in the transmitting direction is reflected with a planar reflecting mirror 16 to be measured, reflected with the splitter 13 and inputted into the camera 15. The interference fringes, which are generated by the overlapping of these luminous fluxes at the splitter 13, are picked up with the camera 15. The interference fringes are analyzed, and an angle which is formed by the wave surfaces of the luminous fluxes is measured. Thus the angle of the object to be measured is measured. A piezoelectric element 18, to which the reflecting mirror 14 is fixed, is controlled with a personal computer 22, and the reflecting mirror 14 undergoes fringe scanning.

5. 发明专利

JPS6398624A SYNCHRONOUS DETECTING METHOD 失效
公开(公告)号：JPS6398624A
公开(公告)日：1988-04-30
申请号：JP24605886
申请日：1986-10-16
申请人： RICOH KK
发明人： KANEKO YUTAKA
IPC分类号： G02B26/10 , H04N1/04 , H04N1/113
摘要： PURPOSE:To detect synchronizing light properly all the time and to make a device compact by detecting a light beam which is deflected and travels to an optical scanning area as the synchronizing signal, and timing the start of optical scanning. CONSTITUTION:A lens 18 is arranged between a light receiving element which detects the light beam as the synchronizing light and an image forming lens 12, a synchronizing light detection position Q1 is set on the deflection-directional composite focal plane of the image forming lens 12 and lens 18, and the light receiving element is arranged at the position. The lens 18 has power at least in a deflection direction and the synchronizing light is converged on the light receiving element at least in the deflection direction. The light receiving element is arranged on the composite focal plane, so even if the deflected light beam varies owing to the error of an optical deflector, the synchronizing signal is detected correctly all the time.

6. 发明专利

JPS62200318A SEMICONDUCTOR LASER SCANNER 失效
公开(公告)号：JPS62200318A
公开(公告)日：1987-09-04
申请号：JP4285386
申请日：1986-02-28
申请人： RICOH KK
发明人： KANEKO YUTAKA
IPC分类号： G02B26/10 , H04N1/04 , H04N1/113
摘要： PURPOSE:To prevent the light beams reflected by an optical element from returning to a laser diode and a photodiode by providing the optical element at an angle to the optical axis of a colimator lens. CONSTITUTION:The divergent luminous flux emitted from a semiconductor laser 1 is converted to a luminous flux of parallel rays by a colimator lens 2 and is made incident on the first cylinder lens 3 and is shaped and is deflected and scanned. The lens 3 is provide at an angle to the optical axis of the lens 2 so that the reflected light from the lens 3 is fed back to the heat sink 14 side of the laser 1. Not only the lens 3 but also the second cylinder lens 8 may be provided at an angle to the optical axis of the lens 2. Since the reflected beams use not fed back to a laser diode 16 and a photo diode 17 of the laser 1 in this constitution, the picture quality is improved.

7. 发明专利

JPS6212891B2 失效
公开(公告)号：JPS6212891B2
公开(公告)日：1987-03-23
申请号：JP10050979
申请日：1979-08-07
申请人： RICOH KK
发明人： KANEKO YUTAKA
IPC分类号： G02B26/10 , G02B5/32

8. 发明专利

JPS61175611A DETECTING DEVICE FOR SYNCHRONIZING LIGHT 失效
公开(公告)号：JPS61175611A
公开(公告)日：1986-08-07
申请号：JP1600185
申请日：1985-01-30
申请人： RICOH KK
发明人： KANEKO YUTAKA
IPC分类号： G02B26/10 , H01S5/00 , H01S5/042
摘要： PURPOSE:To make synchronizing light incident on a synchronizing light detection position accurately at any time by providing a photodetecting element nearby a signal processing part and putting a deflection point and the synchronizing light detection position in mutually conjugate relation at right angles to a sweep surface. CONSTITUTION:The photodetecting element 36 is arranged nearby the signal processing part of an electric accessary part. A lead wire which connects the both together may be short, so the electric influence of an outside field is not entered as a noise through the lead wire and a buffer circuit for noise elimination is therefore unnecessary. If surfaces of a rotary polygon mirror 16 slant, a deflected beam changes in direction upward and downward on the sweep surface about the deflection point, but synchronizing light which is emitted from the deflection point P and transmitted through an ftheta lens 20 and a cylindrical lens 32 is incident on the synchronizing light detection position without fail because the deflection point and synchronizing light detection position (position of incidence end of optical fiber 34) are put in conjugate relation through the ftheta lens 20 and cylindrical lens 32.

9. 发明专利

JPS61144621A DUSTPROOF PLATE FOR OPTICAL UNIT 失效
公开(公告)号：JPS61144621A
公开(公告)日：1986-07-02
申请号：JP26687384
申请日：1984-12-18
申请人： RICOH KK
发明人： KANEKO YUTAKA
IPC分类号： G02B27/00 , B41J2/44 , G03B27/50 , G03G15/04
摘要： PURPOSE:To obtain a dustproof plate of an optical unit which is rigid and durable with ease of manufacture by molding integrally a light transmitting part, a sliding piece to be engaged with the guide part of the optical unit in sliding contact therewith in the stage of attaching and detaching and a gripping part to be gripped in the stage of attaching and detaching by using a light transmittable synthetic resin. CONSTITUTION:Laser light from a semiconductor laser 4 arrives at a rotary polygon mirror 6 via a collimator lens 5 and is changed continuously in the exit direction by said mirror, by which the laser light is oscillated in the scanning direction. The laser light irradiates a photosensitive body 14 via the dustproof plate 9 after the laser light is successively reflected by an ftheta lens L1, the 1st mirror 7 and the 2nd mirror 8. The semiconductor laser 4, the collimator lens 5, the rotary polygon mirror 6, the ftheta lens L1, the 1st mirror 7, the 2nd mirror 8, etc. are installed in a frame 15 which is the outside plate of the optical unit and the light is conducted through the dustproof plate 9 mounted in the aperture of the frame 15 to the body 14. The dustproof plate 9 has an I-shaped section and the light transmitting part 100, the sliding piece 200 and the gripping part 300 are integrally molded of the same material.

10. 发明专利

JPS6037522A MODULATING OPTICAL SYSTEM 失效
公开(公告)号：JPS6037522A
公开(公告)日：1985-02-26
申请号：JP14486983
申请日：1983-08-10
申请人： RICOH KK
发明人： KANEKO YUTAKA
IPC分类号： G02F1/11
摘要： PURPOSE:To suppress influence of dirt, dust, etc. on the incident and exit faces of an ultrasonic optical modulating element by reducing the diameter of the beam incident on said element only in the propagating direction of an ultrasonic wave. CONSTITUTION:A beam compressor 6 and a beam expander 7 are formed of a pair of cylindrical lenses having refracting power only within the progressing direction of an ultrasonic wave. Only the beam diameter dH in the propagating direction of the ultrasonic wave incident on an ultrasonic optical modulating element 2 is reduced by such lenses. Since the modulating optical system is formed in such a way, the beam diameter dH in the propagating direction of the ultrasonic wave in the element 2 is so reduced as to have the access time meeting a modulating band and on the other hand the beam diameter dV in the vertical direction is increased. The influence of dirt, dust, etc. on the incident and exit faces of the modulating element is thus suppressed.

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