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11. 发明专利

JPH03237414A AUTOMATIC FOCUSING DEVICE 失效
公开(公告)号：JPH03237414A
公开(公告)日：1991-10-23
申请号：JP3354090
申请日：1990-02-14
申请人： CANON KK
发明人： SAITO SHUICHIRO
IPC分类号： G03B13/36 , G02B7/28 , H04N5/232
摘要： PURPOSE:To more rapidly set up the focusing state of a photographing optical system by moving a focusing lens stepwise, and determining the stop position of the lens in comparing the outputs of a signal forming means at respective moving points. CONSTITUTION:The automatic focusing device is provided with a control means for moving the focusing lens 10 stepwise and determining the stop position of the lens 10 by comparing the outputs of the signal forming means in each moving points. Namely, after zooming the lens by a motor 28, a motor 32 is rotated to control the focusing point of the lens 10. A system control circuit 62 divides the movable range of the lens 10 into plural areas based upon field depth calculated from the focal distance of the photographing optical system and a stop value and moves the lens 10 to the representative points of respective areas in steps and the outputs of a detector in each representative point positions are sequentially stored in an internal memory of a system control circuit 62. Focusing decision on respective discrete points obtained by discretely moving the lens 10 within the necessary range of focusing operation is executed. Consequently, the lens can arrive at the focusing position within a short time.

12. 发明专利

JPH0392831A PARALLAX CORRECTING MECHANISM 失效
公开(公告)号：JPH0392831A
公开(公告)日：1991-04-18
申请号：JP23015589
申请日：1989-09-05
申请人： CANON KK
发明人： SAITO SHUICHIRO
IPC分类号： G03B13/14 , G02B5/04
摘要： PURPOSE:To correct the parallax between a photographic optical system and a finder optical system by arranging a variable vertical angle prism in the finder optical system and varying the vertical angle of the prism according to the distance to a subject. CONSTITUTION:The photographic lens 71 and finder system has different optical axes and the variable vertical angle prism 101 is arranged right before the objective 73 of the finder system. Then plane glass 21 has an about 2theta angle of rotation from the part of the variable vertical angle prism 101 where the refractive index is about 1.5, where theta is the angle of a subject on the optical axis of the photographic lens 71 when the subject is viewed from the finder system. Consequently, light from the subject is guided onto the optical axis of the finder optical system through the prism operation of the variable vertical angle prism 101 and the subject is on the optical axis of the photographic lens and also on the optical axis of the finder optical system, so that the parallax can be corrected. Consequently, the parallax between the photographic lens and finder system can be corrected.

13. 发明专利

JPH01265679A ELECTRONIC CAMERA 失效
公开(公告)号：JPH01265679A
公开(公告)日：1989-10-23
申请号：JP9358188
申请日：1988-04-18
申请人： CANON KK
发明人： SAITO SHUICHIRO , DATE NOBUAKI
IPC分类号： H04N5/225
摘要： PURPOSE:To obtain high quality picture without color slurring and to attain the setting of high speed time for the shutter by arranging the shutter in front of the incident optical path of plural pickup devices and selecting the running direction of the shutter elements in the same direction. CONSTITUTION:With a release switch turned on, plungers 38, 39 are energized with a prescribed time interval. With the plunger 38 energized, an arm 22 is turned clockwise, a blade 28 is moved in the direction A to open an aperture 21a thereby initiating the exposure. When the plunger 39 is active, the rear blade 35 is moved in the direction A similarly to the case with the case of the blade 28 to shut the aperture 21a thereby completing the exposure. The shutter is provided in front of the incident luminous flux of the plural image pickup device in this way, then the fast moving object is picked up without blur and high quality picture without color slurring is obtained by selecting the drive direction of the shutter elements the same.

14. 发明专利

JPH01251020A DISPLAY DEVICE 失效
公开(公告)号：JPH01251020A
公开(公告)日：1989-10-06
申请号：JP7909988
申请日：1988-03-31
申请人： CANON KK
发明人： SAITO SHUICHIRO
IPC分类号： G03B13/02 , G03B17/20
摘要： PURPOSE:To enable the adjustment of diopter by providing turning operation members with eccentric pins for fine adjustment of a display substrate in an optical axis direction to a display holder. CONSTITUTION:The means for fine adjustment in the optical axis direction designed to adjust the fixing position of the fixing plate of the display substrate 2 in the optical axis direction to the display holder 1 is formed in the position where the display holder 1 and the display substrate 2 are engaged with each other. The display substrate 2 engaged with the eccentric pins 15a, 16b can be finely adjusted in the optical axis direction when the turning operation members 15, 16 with the eccentric pins 15a, 16a turnably provided to the display holder 1 are turned by a screw driver. The diopter is thereby easily adjusted.

15. 发明专利

JPS6283735A DIAPHRAGM DRIVING SYSTEM 失效
公开(公告)号：JPS6283735A
公开(公告)日：1987-04-17
申请号：JP22449985
申请日：1985-10-08
申请人： CANON KK
发明人： SAITO SHUICHIRO
IPC分类号： G03B9/02 , G03B7/095 , G03B7/10
摘要： PURPOSE:To execute always the correct adjustment by driving only the step equivalent to the excessive part in the reverse direction after diaphragm blades are excessively driven to at least one step at the time of the control at a small aperture side. CONSTITUTION:When the output spindle of a stepping motor 7 is rotated in the counter-clockwise direction, through a pinion gear 8 and a sector gear 2g, a driving ring 2 is rotated in the counter-clockwise direction, a pin 5 is also driven in the clockwise direction, by the action of a pin 6 and a cam groove 3b, diaphragm vanes 4 are rotated in the counter-clockwise direction with the pin 5 as a center and th diaphragm aperture diameter comes to be small. Reversely, when the step motor 7 is rotated and controlled in the counter- clockwise direction and the diaphragm aperture diameter comes to be large. For example, when adjustment is executed from F1.4 to F1.6 and F22, 28 and 32 steps are driven excessively to one step, and 29 and 33 steps are driven respectively and thereafter, one step part is returned. When the adjustment is executed from F32 to F22 and F16, four or eight steps are driven excessively to one step and five or nine steps are driven, and thereafter, one step part is returned. Thus, the correct adjustment can be always executed.

16. 发明专利

JPH07239442A MIRROR OPTICAL DEVICE 失效
公开(公告)号：JPH07239442A
公开(公告)日：1995-09-12
申请号：JP5463594
申请日：1994-02-28
申请人： CANON KK
发明人： SAITO SHUICHIRO
IPC分类号： G02B23/02 , G02B7/182 , G02B7/183 , G02B17/08 , G02B23/06
摘要： PURPOSE:To obtain a mirror optical device provided with structure contributing to the lightweight of the whole device, high vibration resistance and high impact resistance by constituting a main mirror and a sub-mirror which are arranged to be faced and a column of an identical material. CONSTITUTION:As for the mirror optical device constituted so that the main mirror 1 and the sub-mirror 5 which are arranged to be faced are coupled by the plural column 2, the mirrors 1 and 5 and the columns 2 are constituted of the identical material. Then, the mirror 5 is held by a sub-mirror holding part 4 and the holding part 4 is supported by a sub-mirror base plate 3 connected to the columns 2. When these members are slightly deformed after vibration, acceleration and impact are added, positional relation between the mirrors 1 and 5 is changed and optical performance is deteriorated. Therefore, it is preferable that the material showing brittleness according to environmental change such as the using temperature or the carrying temperature of the device is used as the respective members. When the brittle material is used, the strength is low in comparison with a metallic material but there is hardly residual distortion after stress acts and it is eliminated. As a result, high accurate assembly is realized.

17. 发明专利

JPH07239431A OPTICAL ELEMENT HOLDING DEVICE 失效
公开(公告)号：JPH07239431A
公开(公告)日：1995-09-12
申请号：JP5463494
申请日：1994-02-28
申请人： CANON KK
发明人： SAITO SHUICHIRO
IPC分类号： G02B7/00 , G02B7/18 , G02B7/182 , G02B7/183
摘要： PURPOSE:To easily assemble a device, to easily adjust the position of an optical element and to enhance impact resistance and vibration proofing property as for the device constituted so that the optical element is held by a holding device. CONSTITUTION:Plural holes 1b are provided on the outside circumferential surface of the optical element 1 at almost equal intervals and one end part of a supporting member 4 whose other end part is inserted into the hole 1b is fixed to the optical element holding member 2. Then, the supporting member 4 is fixed to the holding member 2 through spherical washers 5 and 9. Besides, a sleeve 3 or an adhesive material is arranged in a gap between the hole 1b and the supporting member 4.

18. 发明专利

JPH04191807A LENS POSITION CONTROLLER 失效
公开(公告)号：JPH04191807A
公开(公告)日：1992-07-10
申请号：JP32453590
申请日：1990-11-27
申请人： CANON KK
发明人： SAITO SHUICHIRO
IPC分类号： G03B13/36 , G02B7/08 , G02B7/32
摘要： PURPOSE:To allow the position detection of lens optical systems with high accuracy as well as to miniaturize the size and to reduce the number of the parts by providing a position detecting means which receives the light from light emitting means and detects the positions of the respective lens optical systems from light receiving positions along the optical axis direction. CONSTITUTION:The light receiving parts 34a of a photodiode consisting of semiconductor silicon are formed along the longitudinal direction of the position detecting element 34. The light emitting parts of LEDs 35, 37 and the light receiving part 34a are disposed to face each other. The LED 35 emits light when electric power is supplied from terminals 35a, 35b. The light passed a slit 36a is cast onto the light receiving part 34a. The LED 37 emits light when electric power is supplied from terminals 37a, 37b. The light passed the slit 38a is then cast onto the light receiving part 34a. When the LED 35 or LED 37 is made to emit light, the current corresponding to the position thereof is outputted from the output terminals 34d, 34b corresponding to the position of the light passed the slit. The size and cost are reduced in this way and further, the position control is executed with high accuracy.

19. 发明专利

JPH04190207A AUTOMATIC FOCUSING DEVICE 失效
公开(公告)号：JPH04190207A
公开(公告)日：1992-07-08
申请号：JP31783390
申请日：1990-11-26
申请人： CANON KK
发明人： SAITO SHUICHIRO
IPC分类号： G03B13/36 , G02B7/08 , G02B7/28
摘要： PURPOSE:To perform a focusing operation with higher accuracy by integrally displacing all lens groups along an optical axis, after completion of the focusing operation, in corresponding relation to an optical distance error between all lengs groups retained by a lens retainer means during the focusing operation and a photographing means. CONSTITUTION:On the basis of a photograph object distance data calculated from the output signal of a distance measuring means 15, the rotational direction and quantity of a focusing motor 12 are calculated by a system controller 16, or are selected from the previously stored data, whereby a drive signal is outputted to a motor drive circuit 17. As a result, the motor 12 starts rotation. With the rotation of the motor 12, a retainer frame 3 is rotated via a gear 13, whereby the retainer frame 3 and a first lens group 1 are displaced along an optical axis through helicoid coupling thereof with a moving member 4. Thus, focusing is performed. Next, the respective positions of the first lens group 1 and second lens group 2 having a high focus sensitivity are sensed by high resolution position sensors 20, 21. Subsequently, the amount of error of the focusing plane, as measured along the optical axis, corresponding to the amount of error of each lens group as measured from a specified position, is determined. Then, a fixed cylinder 8 is driven by the amount of error toward the optical axis to cause focusing operation with high accuracy.

20. 发明专利

JPH04190206A AUTOMATIC FOCUSING APPARATUS 失效
公开(公告)号：JPH04190206A
公开(公告)日：1992-07-08
申请号：JP31783290
申请日：1990-11-26
申请人： CANON KK
发明人： SAITO SHUICHIRO
IPC分类号： G03B13/36 , G02B7/08 , G02B7/28 , H04N5/232
摘要： PURPOSE:To perform focusing operation with higher accuracy by relatively displacing all lens groups and a photographing means by positional errors thereof as measured from a focusing target position along the optical axis, after performance of a zooming operation. CONSTITUTION:On the basis of the output signal from a distance measuring means 15, a photographing object distance is calculated, and the position of CCD 18, as taken along the optical axis, corresponding to this object distance is calculated by operation of a system controller 16, or the position A of CCD 18 as taken along the optical axis is selected from the previously stored data. Next, the positional errors of a first lens group 1 and a second lens group 2 as taken from specific positions are sensed in accordance with the output signals from the position sensors 21, 22, whereby the system controller 16 calculates the correction value B of CCD 18 as applied along the optical axis, or selects this correction value B from the previous stored data, which correction value B is added to the CCD 18 position corresponding to the photographing object distance (A + B). Then, a motor 25 is driven via a motor drive circuit 27 to adjust CCD 18 position by means of a feed screw 24, whereby the controller 16 stops the motor 25 when a target value signal is inputted thereto from a position sensor 26.

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