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51. 发明专利

JPS6370215A SLIT EXPOSURE COPYING DEVICE 失效
公开(公告)号：JPS6370215A
公开(公告)日：1988-03-30
申请号：JP21411786
申请日：1986-09-12
申请人： CANON KK
发明人： TOKUHARA MICHIHIRO
IPC分类号： G02B13/18 , G03B27/50
摘要： PURPOSE:To improve image forming performance while holding necessary brightness by providing an aspherical surface at a position where influence is exerted principally upon luminous flux off an axis symmetrically about a stop. CONSTITUTION:The lens of a main device is a zoom lens which is in a right-left symmetrical shape about the stop and varied in power by varying gaps between D2 and D15, and D8 and D9. For example, the slit lengthwise diameter phi1 of the lens arranged at the outermost position is 72mm and the slit lengthwise diameter phi2 is 0.25mm. Then, the distance between object images is 941.48mm, the gap between the 1st surface of the lens and an object surface and the gap between the final surface of a lens and an image plane are both 420.39mm at the time of life size, and a projection lens moves by 101.6mm from the position at the time of life size toward the image plane at the time of reduction. This device compensates off-axis aberrations to obtain excellent image forming performance even when a projection lens which is different in F number for both of a sagittal and a meridional directions is used.

52. 发明专利

JPS61232411A PHOTOSCANNING OPTICAL SYSTEM 失效
公开(公告)号：JPS61232411A
公开(公告)日：1986-10-16
申请号：JP7358685
申请日：1985-04-09
申请人： CANON KK
发明人： TOKUHARA MICHIHIRO
IPC分类号： G02B26/10 , B41J2/44 , G02B26/00 , G02B26/08 , G03G15/04
摘要： PURPOSE:To eliminate the influence of an error in the arrangement of an optical system by turning an optical modulator around an axis coincident with or near the array direction of a mirror rocking part in a main scanning direction. CONSTITUTION:An electromechanic optical modulator 27 like a DMD element is equipped with a position correcting mechanism 38 which rotate the modulator 27 around the axis coincident with or nearby direction of line printing. Namely, even if luminous flux A incident on the optical modulator 27 shifts into luminous flux A', the optical modulator 27 is so rotated as to correct it, and consequently signal light B' can be made incident on the entrance pupil of an image forming lens 29 as well as a signal B having no shift. The axis around which the optical modulator 27 is rotated is not relative to the tilt direction of the mirror rocking part 13 for the optical modulator so much and set in the array direction of the main scanning direction of the mirror rocking part 13. Consequently, corrections are easily made and an image output device which has a little influence of an error in the position of the optical system is obtained.

53. 发明专利

JPS61183637A ORIGINAL DETECTING DEVICE 失效
公开(公告)号：JPS61183637A
公开(公告)日：1986-08-16
申请号：JP2391285
申请日：1985-02-09
申请人： CANON KK
发明人： SUEDA TETSUO , TOKUHARA MICHIHIRO
IPC分类号： G03B27/62 , G03G15/04
摘要： PURPOSE:To detect easily a size of an original by deriving an optical image from two slit-shaped areas being non-parallel to each of directions vertical to the moving direction of the original, and an optical image from a point- shaped area, and executing an operation by a reference clock. CONSTITUTION:An original 1 which has been placed on a platen glass 3 is irradiated by a light source 2, and when a reflected light from the original 1 exists or not is detected by an optical system (lenses 4a-4c, slits 5a, 5b, a pin hole 5c, and photodetectors 6a-6c) on a scanning means 7. The scan is executed by moving the original 1 or one of the scanning means 7 in the direction of an (x) axis. The slits 5a, 5b are provided so as to be inclined in the directions (x), (y), and to be in a line symmetry. The reflected light from on line segments 5a', 5b' is made incident on the slits 5a, 5b. Outputs of the photodetectors 6a-6c are inputted to a CPU which is not shown in the figure, and by a counter, a point where existence of the reflected light is varied is derived. In this way, by recognizing the end point of the original, a size and/or a position of the original can be detected.

54. 发明专利

JPS6052813A FORMATION OF LIGHT SOURCE USING DISTRIBUTED INDEX LENS AND LIGHT SOURCE DEVICE 失效
公开(公告)号：JPS6052813A
公开(公告)日：1985-03-26
申请号：JP16230883
申请日：1983-09-02
申请人： CANON KK
发明人： USAMI AKIHIRO , TOKUHARA MICHIHIRO
IPC分类号： G02B9/02 , G02B3/00 , G02B19/00 , G02B27/00
摘要： PURPOSE:To enable easy correction of an aberration even if a distributed index lens is used by shielding partly the luminous flux passing through the peripheral part of the lens. CONSTITUTION:The refractive index n(r) of a distributed index lens which is good in aberration in the position apart by (r) from the optical axis of said lens is expressed by the equation with the axial refractive index as n0 in which (g) is the value to determine the power of inhomogeneous paraxial quantity, (hi) is the value relating to the (i-1)th aberration and both are constants. A lens 12 is the distributed index lens manufactured by controlling the term up to h6 of said equation in the stage of manufacture. The luminous flux from a semiconductor laser 11 is collimated by the lens 12 and is emitted therefrom. A stop 13 which limits the diameter of the luminous flux is provided on the exit plane and the diameter D2 of the stop is smaller than the diameter D1 of the lens 12. The ghost light generated on the outside circumference of the lens 2 is shut off and the aberration is maintained satisfactorily by the simple method.

55. 发明专利

JPS606965A ELECTROPHOTOGRAPHIC COPYING MACHINE 失效
公开(公告)号：JPS606965A
公开(公告)日：1985-01-14
申请号：JP11482383
申请日：1983-06-24
申请人： CANON KK
发明人： TOKUHARA MICHIHIRO
IPC分类号： G03B27/72 , G03B27/62 , G03G15/00 , G03G15/04
摘要： PURPOSE:To perform density control corresponding accurately to original density by arranging a photodetecting element where luminous flux from the center part of an original and luminous flux from an end part of the original perpendicular to an original scanning direction are photodetected. CONSTITUTION:The photodetecting element 11 which generates an electric signal corresponding to the quantity of light of photodetection such as a solar battery and Cds photodetects from the original through a lens 7. Then, this photodetecting element 11 is arranged on the optical path between the lens 7 and a correcting plate 12 for a distribution of the quantity of light and where light to which a photosensitive body is exposed is not cut off. Therefore, the image of the photodetecting element 11 is not formed on the photosensitive body, a copy image is not spoiled, and the density control over the copy image corresponding accurately to the original density is performed.

56. 发明专利

JPS5840518A OPTICAL DEVICE HAVING VARIABLE MAGNIFICATION 失效
公开(公告)号：JPS5840518A
公开(公告)日：1983-03-09
申请号：JP13916281
申请日：1981-09-03
申请人： CANON KK
发明人： TORIKAI AKIYOSHI , MORIKAWA TERUO , TOKUHARA MICHIHIRO
IPC分类号： G02B13/24 , G02B15/00 , G02B17/08 , G02B27/18 , G03G15/041
摘要： PURPOSE:To obtain an image with a focused magnification by compensating the lens and mirror positions corresponding to a selected magnification in accordance with a focal distance error of a lens. CONSTITUTION:A pin 57 fixed on a mirror board 21 provided with mirros 14, 15 and a pin 49 fixed on the end of a lod 47 for a stopper 38 engaged with the notches 36, 37 of a positioning plate 35 are engaged with the fluted cams 58, 51 of a cam plate 50 respectively. When the cam plate 50 is rotated by a motor 52, a mirror board 21 and a positioning plate 35 for a lens 16 are moved along a rail 23 respectively. In said device, the moving distance of the mirror board 21 and the positioning plate 35 can be compensated in accordance with the focal distance error of each lens by loosening a nat 54 to control the rotation of the cam plate 50 around an axis 53. In any magnification mode, a focused image with the magnification corresponding the selected mode can be formed.

57. 发明专利

JPS5840516A OPTICAL DEVICE HAVING VARIABLE MAGNIFICATION 失效
公开(公告)号：JPS5840516A
公开(公告)日：1983-03-09
申请号：JP13916081
申请日：1981-09-03
申请人： CANON KK
发明人： TOKUHARA MICHIHIRO , TORIKAI AKIYOSHI , MORIKAWA TERUO
IPC分类号： G03B27/34 , G02B13/24 , G02B15/00 , G03G15/041
摘要： PURPOSE:To prevent an image form defocusing due to erros of focal distance by controlling the moving distance of a lens at the changing its magnification in the direction of the optical axis of the lens in accordance with erroneous values of the focal distance of the lens. CONSTITUTION:A lens 16 is stored in a lens barrel 24. The lens barrel 24 has a fitting plate 26, which is provided with a long hole 27 parallel to an optical axis A and fixed on a lens stand 25 by a screw 28. A bearing 32 is guided by a guiding axis 33 parallel to the optical axis A and slid by a wire 34. The distance between the notches 40, 41 of a positioning plate 39 is equal to the moving distance of the lens 16 at the time of no error in the focal distance of the lens 16 and a stopper 42 is engaged with the notch 40 at the unmagnification or the notch 41 at the contraction respectively. When a nut 59 is loosened and a cam plate 55 is adjusted by turning it around an axis 58, a pin 54 engaged with the cam plate 55 is moved in the direction parallel to the optical axis A and the stopper 42 is also moved in the same direction by the same distance with a long hole 43, preventing an image from defocusing due to focal distance errors.

58. 发明专利

JPS57211170A OPTICAL SYSTEM FOR COPYING MACHINE 失效
公开(公告)号：JPS57211170A
公开(公告)日：1982-12-24
申请号：JP9640281
申请日：1981-06-22
申请人： CANON KK
发明人： TOKUHARA MICHIHIRO
IPC分类号： G03G15/04
摘要： PURPOSE:To compensate the color sensitivity of a photoreceptor or the like inexpensively, by providing a transmissive multilayered interference film on the lens face, which faces to the reflective face, of an orthometachromatic reflective lens of a real size system and allowing the luminous flux to pass through this lens face twice. CONSTITUTION:A transmissive multilayered interference film 10 is provided on the lens face, which faces to a mirror 5a, of an orthometachromatic reflective lens of a real size system, namely, the second face of a meniscus lens III. For example, the multilayered interference film 10 consists of first, third, and fifth layers which consist of TiO2 and have a high refractive index and second, fourth, and sixth layers which consist of MgF2 and have a low refractive index, and a lens which consists of Al or the like and has a high reflection factor is used as the mirror 5a.

59. 发明专利

JPS57189109A OPTICAL ADJUSTMENT METHOD FOR COPYINGMACHINE 失效
公开(公告)号：JPS57189109A
公开(公告)日：1982-11-20
申请号：JP7548081
申请日：1981-05-18
申请人： CANON KK
发明人： TOKUHARA MICHIHIRO
IPC分类号： G03B27/34 , G02B15/14 , G02B15/20 , G03G15/04 , G03G15/041
摘要： PURPOSE:To obtain an excellent image at each magnification, by compensating the manufacturing tolerance of lens focus and distance between objectives at equal magnification through the displacement of the start point of shift only with the internal shift without giving the entire movement of a zoom lens. CONSTITUTION:A zoom lens is an ortho-meta type lens which is symmetrical to an aperture 7. Moving groups G2, G3 and G4 are internally shifted to a fixed group G1 to change the focus of the entire lens system. At magnification, the focus can be changed by changing a plane interval d2 between the fixed group G1 and the moving group G2 and a plane interval D8 between the moving groups G4 and G4 and the intervals between other lenses except two plane intervals can not be changed.

60. 发明专利

JPS52138126A DATA PHOTOGRAPHING DEVICE FOR CAMERA 失效
公开(公告)号：JPS52138126A
公开(公告)日：1977-11-18
申请号：JP5517176
申请日：1976-05-14
申请人： CANON KK
发明人： TOKUHARA MICHIHIRO , TAKAHASHI TOSHIAKI
IPC分类号： G03B17/24
摘要： PURPOSE:To enable the recording of a distinct data image without being bulky due to the back lid by providing a fiber plate with less than 0.5% an opening angle which limits a field of view at a portion of a depressor plate.

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