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1. 发明专利

JP2001108883A LENS BARREL AND IMAGE PICKUP DEVICE 失效
公开(公告)号：JP2001108883A
公开(公告)日：2001-04-20
申请号：JP29051199
申请日：1999-10-13
申请人： CANON KK
发明人： KOBAYASHI FUTOSHI
IPC分类号： G02B7/04 , G03B11/04 , G03B17/04
摘要： PROBLEM TO BE SOLVED: To facilitate the manufacture and to lighten the load on a motor. SOLUTION: A cam follower 12a of a cylinder body 12 which holds a lens part 24 engages a cam groove 14a on the internal surface of a moving cam cylinder 14. The cam groove 14a comprises an insert cam that the cam follower 12a engages when the cylinder body 12 is built in the moving cam cylinder 14, a collapsing cam which holds the cylinder body 12 at a collapsing position, an extension cam which moves the cylinder body 12 between the collapsing position and a photography position for photography, and a photography cam which moves the cylinder body 12 for zooming in the photography position. The collapsing cam and photography cam are so shaped as to closely engage the cam follower 12a and the extension cam is so sectioned as to loosely engage the cam follower 12a.

2. 发明专利

JP2000155260A AUTOMATIC FOCUSING DEVICE AND IMAGE PICKUP DEVICE EQUIPPED WITH THE SAME 失效
公开(公告)号：JP2000155260A
公开(公告)日：2000-06-06
申请号：JP33275198
申请日：1998-11-24
申请人： CANON KK
发明人： KOBAYASHI FUTOSHI
IPC分类号： H04N5/232 , G02B7/28 , G02B7/34 , G03B13/36
摘要： PROBLEM TO BE SOLVED: To provide an automatic focusing device capable of realizing a rapid and accurate automatic focusing function and an image pickup device provided with the same. SOLUTION: A pupil dividing means time sequentially dividing the photographing luminous flux of a photographing optical system into at least two areas is provided with a pupil plate 2 having two holes 2a and 2b provided in a symmetrical state centering the optical axis of the photographing optical system, a light shielding means 4 capable of selectively shielding either one of the two holes, and a light shielding signal generating means starting light shielding by means of the means 4 with respect to the other hole which is not in a light shielding condition. A switching starting signal by the light shielding signal generating means can be generated earlier than the finish of photoelectric conversion to an optical image from the one hole.

3. 发明专利

JPH11109204A LENS BARREL AND CAMERA 失效
公开(公告)号：JPH11109204A
公开(公告)日：1999-04-23
申请号：JP26419697
申请日：1997-09-29
申请人： CANON KK
发明人： KONNO YOSHIHIKO , KOBAYASHI FUTOSHI
IPC分类号： G03B13/36 , G02B7/02 , G02B7/09 , G02B7/34
摘要： PROBLEM TO BE SOLVED: To miniaturize a lens barrel while incorporating a time series phase difference autofocusing device by arranging a diaphragm driving means and a pupil division driving means on nearly the same phase around a photographing optical axis. SOLUTION: Relating to this lens barrel having diaphragm means 30, 31 and 32 changing the diaphragm aperture of a photographing optical system and pupil division means 24 and 25 time-sequentially dividing light from the exit pupil of the photographing optical system; an actuator for pupil division 19 and an actuator for a diaphragm 33 are arranged to be juxtaposed in an optical axis direction on nearly the same phase around the photographing optical axis. By such arrangement, the actuators 19 and 33 are arranged together in the lens barrel, so that a projecting part for housing an actuator has only to be provided at one spot in the peripheral direction of the lens barrel. Therefore, the lens barrel is miniaturized in comparison with the case that the actuators 19 and 33 are arranged on the different phases around the optical axis and the projecting parts for housing the actuator are provided at two spots in the lens barrel.

4. 发明专利

JPH10322589A IMAGE PICKUP DEVICE 失效
公开(公告)号：JPH10322589A
公开(公告)日：1998-12-04
申请号：JP12700897
申请日：1997-05-16
申请人： CANON KK
发明人： KOBAYASHI FUTOSHI
IPC分类号： G03B11/00 , H04N5/232
摘要： PROBLEM TO BE SOLVED: To insert/remove an optical low-pass filter(LPF) for preventing the generation of false color corresponding to the photographic mode of pixel shift photographing for improving a resolution concerning an image pickup device using a solid-state imaging device. SOLUTION: An optical low-pass filter 6a for false color generation prevention is provided on a holding frame 6, and this optical LPF 6a is made movable to a prescribed 1st position to be used in an image pickup and the other 2nd position not to be used at the time of image pickup by a pinion 8a and a rack 6d. Besides, as a pixel shift photographing mechanism for improving the resolution, an infrared cut filter 3a provided on a holding frame 3 is inclined so as to shift an image on an image pickup plane 1 just for a prescribed amount. Then, these components are driven selectively while using one motor 13 and a gear mechanism.

5. 发明专利

JPH0943507A ELECTRIC STILL CAMERA AND FOCUSING CONTROL METHOD THEREOF 失效
公开(公告)号：JPH0943507A
公开(公告)日：1997-02-14
申请号：JP19759595
申请日：1995-08-02
申请人： CANON KK
发明人： SASAKURA TAKAO , KURAHASHI SUNAO , OGURA SHIGEO , OKAUCHI SHIGEKI , FUKUSHIMA NOBUO , UDAGAWA YOSHIRO , KOBAYASHI FUTOSHI , SARUWATARI HIROSHI , TANAKA TSUNEFUMI
IPC分类号： G03B13/36 , G02B7/34 , G02B7/36 , H04N5/232
摘要： PROBLEM TO BE SOLVED: To unnecessitate an optical system and a sensor both used exclusively for AF(automatic focusing) by fetching the output image of a photographing element on each moved position of a pupil and performing focusing control of an optical system based on a defocusing amount obtained by the correlation arithmetic. SOLUTION: A pupil position is moved to symmetrical positions to the optical axis of an optical system for photographing, the output image of a photographing element on each moved position of a pupil is fetched and focusing control of the optical system is performed based on a defocusing amount obtained from its correlation arithmetic. Namely, sweep-out transfer, reading out only a necessary read-out area at an ordinary speed and others at high speed, is performed. Partial high-speed reading is performed as same as a first time, the data are fetched, correlation arithmetic between them and the first held data is performed and a defocusing amount is obtained. A lens is moved in the direction of optical axis based on the defocusing amount thus obtained and a pupil diaphragm for AF is withdrawn out of the optical path. Thus, phase difference AF operation and pupil time dividing phase difference AF operation are performed.

6. 发明专利

JPH10173967A IMAGE PICKUP DEVICE 失效
公开(公告)号：JPH10173967A
公开(公告)日：1998-06-26
申请号：JP33520096
申请日：1996-12-16
申请人： CANON KK
发明人： KOBAYASHI FUTOSHI
IPC分类号： H04N5/225 , H04N9/07
摘要： PROBLEM TO BE SOLVED: To realize picture element shift by parallel flat plates and escape of the parallel flat plates with a simple configuration. SOLUTION: A support frame 16 supports parallel flat plates 14 turnably around a shaft 18. A slider 20 having the shaft 18 is fed horizontally by a feed screw 22b turned by a drive source 22a of a feeding mechanism 22. The slider 20 holds an optical member 26. A step cam 28a is formed to a side of a board 28 opposed to the support frame 16 and a cam follower 16a following to the step cam 28a while being in press contact therewith is formed to the support frame 16 on the other hand. The cam follower 16a follows a cam face of the step cam 28a in response to the movement of the slider 20. Thus, the parallel flat plates 14 are tilted by a prescribed angle. When the slider 20 moves up to one end, the parallel flat plates 14 are deviated from an image pickup optical flux and an optical member 26 enters the image pickup optical flux.

7. 发明专利

JPH09102905A IMAGE PICKUP DEVICE 失效
公开(公告)号：JPH09102905A
公开(公告)日：1997-04-15
申请号：JP26017995
申请日：1995-10-06
申请人： CANON KK
发明人： KOBAYASHI FUTOSHI
IPC分类号： H04N5/238 , H04N5/335 , H04N5/341 , H04N5/351 , H04N5/353 , H04N5/357 , H04N5/369 , H04N5/372 , H04N5/376 , H04N5/378 , H04N5/91
摘要： PROBLEM TO BE SOLVED: To provide proper exposure and to stabilize object field depth by adjusting the quantity of light excepting for the storage period for electric charges to fix aperture during a storage period. SOLUTION: Light received by a light receiving part 18 is sent to a light quantity detection circuit 22 for light quantity detection, the quantity of light is detected, and a signal based on that quantity of light is sent to an iris aperture adjusting part 24. Based on that signal, the adjusting part 24 drives a light quantity adjusting means 4 and changes the area of the aperture and the proper exposure can be provided. The quantity of light of a subject is received by the light receiving part 18 is detected 22 and the aperture of the iris is decided corresponding to that detected quantity of light. The iris aperture is always kept appropriate during the storage period. Therefore, the satisfactory image of appropriate exposure and stable object field depth can be provided for each frame. In this case, the quantity of light can be controlled for the period for moving the electric charges stored in an optic/electric converting part to a transfer part or for the period from the end of transfer period to the start of storage.

8. 发明专利

JPH1096975A SHUTTER DEVICE AND OPTICAL INSTRUMENT WITH THE SAME 失效
公开(公告)号：JPH1096975A
公开(公告)日：1998-04-14
申请号：JP25041396
申请日：1996-09-20
申请人： CANON KK
发明人： KOBAYASHI FUTOSHI
IPC分类号： G03B9/36 , G03B9/40
摘要： PROBLEM TO BE SOLVED: To provide a shutter device capable of executing consecutive exposure as fast as possible and holding light shielding members in an initial stage state, without futile power consumption. SOLUTION: The shutter device having first and second light shielding members 5 and 7 moved respectively between an opening position for opening a shutter aperture 1a and a closing position for closing the shutter aperture, is provided with a control means for executing outgoing direction opening/ closing control for moving the first light shielding member 5 from the closing position to the opening position and then, the second light shielding member 7 from the opening position to the closing position and ingoing direction opening/closing control for returning the second light shielding member 7 from the closing position to the opening position and then, the first light shielding member 5 from the opening position to the closing position.

9. 发明专利

JPH09184974A IMAGE PICKUP DEVICE 失效
公开(公告)号：JPH09184974A
公开(公告)日：1997-07-15
申请号：JP63496
申请日：1996-01-08
申请人： CANON KK
发明人： KOBAYASHI FUTOSHI
IPC分类号： G03B13/36 , G02B7/28 , G02B7/34 , G03B9/04 , H04N5/232
摘要： PROBLEM TO BE SOLVED: To provide an image pickup device capable of quickly focusing without necessitating a sensor used only for focusing on a subject. SOLUTION: An aperture blade 2 with two spectacle-like holes 2a and 2b formed on a concentric circle and plural holes whose diameters are different from each other is arranged at a diaphragm position. A 1st electrical signal is taken out of the image pickup element 6 in a state where one of two holes is closed by a light shielding blade 4, and a 2nd electrical signal is taken out of the image pickup element 6 in a state where the other hole of two holes 2a and 2b is closed. A defocusing quantity is calculated by a range finding means 9 based on a phase difference between the 1st electrical signal and the 2nd electrical signal, then, a focusing lens 1a is moved in accordance with the defocusing quantity so as to focus. Thereafter, the aperture blade 2 is rotated so that the hole of the desired aperture value may be arranged at the luminous flux position of a photographic optical system, then, photographic exposure is performed.

10. 发明专利

JPH09244100A IMAGE PICKUP DEVICE AND SHUTTER 失效
公开(公告)号：JPH09244100A
公开(公告)日：1997-09-19
申请号：JP5040196
申请日：1996-03-07
申请人： CANON KK
发明人： KOBAYASHI FUTOSHI , OGURA SHIGEO
IPC分类号： G03B9/36
摘要： PROBLEM TO BE SOLVED: To realize high-speed operation without using a spring and a hold mechanism by providing a light shielding member equipped with a coil energized so that one or more torque stable equilibrium points may be obtained in one rotation, and driven by an actuator used in a rotational angle area where rotational force makes a rotor work in 1st and 2nd directions by energizing the coil in the 1st and the 2nd directions. SOLUTION: Two actuators are used between the rotational angles (d) and (e). In the non-energized state of the coil shown by a curve (a), the rotor is energized by the torque of a magnetic circuit to either the rotational angle (d) or (e) with a boundary at the rotational angle (f) where the torque is zero. Namely, the rotor being at the rotational angle (d) in the non-energized state remains at the rotational angle (d), and the rotor being at the rotational angle (e) in that state remains at the rotational angle (e). Thus, hold is executed without requiring the hold mechanism such as a cam particularly.

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