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1. 发明专利

JPS62203137A AUTOMATIC FOCUSING DEVICE FOR CAMERA 失效
公开(公告)号：JPS62203137A
公开(公告)日：1987-09-07
申请号：JP4417686
申请日：1986-03-03
申请人： COPAL CO LTD , MITSUBISHI ELECTRIC CORP
发明人： KUROSU TOMIO , KAMEDA HIDEO
IPC分类号： G03B13/36 , G02B7/09 , G02B7/32 , G03B3/00
摘要： PURPOSE:To improve signal light detecting ability and to prevent a taken picture from becoming out of focus (defocused) when external light brightness is high by setting a camera lens at an invariably in-focus position when the aperture value of the camera lens is larger than a specific value. CONSTITUTION:When a control CNT is turned on with the 1st release switch SW11 pressed, the controller supplies an operation start command to an automatic circuit exposure circuit 3 firstly and then a range finding circuit 1. The distance of a subject is detected from the ratio of the quantities of reflected light photodetected by photodetecting elements S1 and S2 respectively. When the operation start command is sent out of the controller CNT by the 1st releasing operation, the output of a comparator CP6 rises to an H level if the controlled aperture value Vc is larger than specific aperture value Vf, thereby turning on transistors (TR) Q1 and Q2. A TR Q4 turns off regardless of whether the output of the range finding circuit 1 is H or L, and a solenoid LMG1 also turns off. Namely, solenoids LMg1 and LMg2 enters states of aperture values (large) in the 1st table and the lens is set at a 'long and intermediate distance' position which is the invariably in-focus position.

2. 发明专利

JPS62203010A DISTANCE MEASURING APPARATUS 失效
公开(公告)号：JPS62203010A
公开(公告)日：1987-09-07
申请号：JP4417586
申请日：1986-03-03
申请人： COPAL CO LTD , MITSUBISHI ELECTRIC CORP
发明人： KUROSU TOMIO , KAMEDA HIDEO
IPC分类号： G01C3/06 , G01B11/00 , G01C3/00 , G02B7/32
摘要： PURPOSE:To enhance both of external light yield strength and signal light detection capacity at the same time, by making it possible to make the resistance value of the resistor connected to a photo detector in series variable corresponding to the quantity of light incident on the photo detector. CONSTITUTION:The resistor connected to a photo detector S1 in series is divided into resistors R1A, R1B, and the resistor R1B is replaced with a photoconductive element. When the quantity of external light incident on the element S1 is decreased, the quantity of light incident on the photoconductive element R1B is also decreased. Because a resistance value R1A+R1B is large in this case, signal light detection capacity is high. By this method, the compatibility of signal light detection capacity and external light yield strength can be achieved.

3. 发明专利

JPH1195083A LENS DRIVING DEVICE 失效
公开(公告)号：JPH1195083A
公开(公告)日：1999-04-09
申请号：JP25681897
申请日：1997-09-22
申请人： COPAL CO LTD
发明人： KOBAYASHI KOICHI , KUROSU TOMIO
IPC分类号： G02B7/04 , G02B7/08
摘要： PROBLEM TO BE SOLVED: To reduce an error due to an individual difference in the case of an overrun when drive is stopped in a lens driving device using a DC motor as a driving source. SOLUTION: By a DC motor 3 rotation, a lens driving member 2 runs toward the left side so as to move a lens 1 forward. An encoding disc 8 is also turned by the motor 3, and a photo-interrupter 9 generates a pulse signal supplied to an AND gate 10. After a detection edge 2 turns on the photo-interrupter 6, the AND gate 10 transmits the pulse signal to advance a counter 11. From a table 21, a reference value per a subject distance is read, while from a table 22, a correction value per a distance zone is read, and a computing unit 16 subtracts the correction value from the reference value so as to find a brake starting value. A coincidance detecting unit 15 actuates a braking device 17 when a counted value of the counter 11 matches the brake starting value so as to apply braking to the motor 3, and then, the member 2 is stopped after a predetermined overrun.

4. 发明专利

JPH07297652A DIFFERENCE CURRENT OUTPUT CIRCUIT 失效
公开(公告)号：JPH07297652A
公开(公告)日：1995-11-10
申请号：JP8695194
申请日：1994-04-25
申请人： SANYO ELECTRIC CO , COPAL CO LTD
发明人： OKUMURA TAKEKIYO , UCHIYAMA YUJI , KUROSU TOMIO , SHIMOYAMADA YOSHITAKA
IPC分类号： H03F3/343 , H03F3/347
摘要： PURPOSE:To provide a difference current output circuit capable of accurately outputting the difference current for plural current signals. CONSTITUTION:The current signal I1 is supplied to the collector side of the input side transistor Q1 of a first current mirror circuit 10 and the current signal I2 is supplied to the collector side of the input side transistor Q6 of a second current mirror circuit 12. A third current mirror circuit 14 is inserted and arranged on the output side of the first current mirror circuit 10. Then, the collector of the output side transistor Q5 of the third current mirror circuit 14 is serially connected to the collector of the output side transistor Q7 of the second current mirror circuit 12 and difference current signals I3''-I4' are sent out from the connection point. Thus, the respective current signals are not affected by the fluctuation of a power supply voltage provided on the outside of this difference current output circuit and the accurate difference current signal is outputted.

5. 发明专利

JPH0735544A DISTANCE MEASURING CIRCUIT 失效
公开(公告)号：JPH0735544A
公开(公告)日：1995-02-07
申请号：JP20026893
申请日：1993-07-20
申请人： COPAL CO LTD
发明人： KUROSU TOMIO
IPC分类号： G01C3/06 , G02B7/32 , G03B13/36
摘要： PURPOSE:To measure a distance at multi-stages by using a triangular distance measuring type distance measuring circuit of current difference comparing type which eliminate the necessity of a logarithmic compression stage. CONSTITUTION:A light projecting part 1 emits a light beam which is then reflected by an object to be measured for a distance, and the reflected light beam is received by light receiving cells S1, S2 from which currents run. An amplifier 28 calculates a difference between the currents, and a comparator 34 determines the sign of the current difference. The current running through the cell S2 is weighed by transistors 19, 22, 23, and then runs through a subtracting point in the amplifier 28. Accordingly, by carrying out comparison with the use of the comparator 34 while successively selecting the transistors 19, 22, 23, multi-stage distance measurement can be made while the reference point is shifted. Meanwhile, a photocurrent in one of the cell is compared with a reference level by the comparator 34, indefinite distance determination can be made.

6. 发明专利

JPH02254429A SHUTTER DEVICE WITH APERTURE DIAMETER REGULATING FUNCTION 失效
公开(公告)号：JPH02254429A
公开(公告)日：1990-10-15
申请号：JP7780989
申请日：1989-03-29
申请人： COPAL CO LTD
发明人： KUROSU TOMIO
IPC分类号： G03B9/08 , G03B9/10 , G03B9/24
摘要： PURPOSE:To reduce the kinetic energy of a driving mechanism and to prevent blades from oscillating when the device is stopped by making motor driving electric power small at the time of blades passing a position near a set target position before the blades arrive at the set target position. CONSTITUTION:A regulating cam 15 is operated in response to desired lens F value and selectively set at a prescribed position. At the next stage, the driving electric power is applied to an actuator in response to a shutter starting timing and the blades 3 and 4 are moved in an opening direction through an operating lever 8. When the blades 3 and 4 arrive at a position near the target position to which the blades are in process of access, a detecting signal is generated from a detecting unit 20 and the driving electric power is reduced in response to the detecting signal. Then the kinetic energies of the blades 3 and 4 and the lever 8 are made small. In a condition described above, the lever 8 abuts on the cam 15 by a small impact force and the oscillation of the blades 3 and 4 is substantially regulated.

7. 发明专利

JPH0198904A POSITION DETECTING DEVICE 失效
公开(公告)号：JPH0198904A
公开(公告)日：1989-04-17
申请号：JP25660987
申请日：1987-10-12
申请人： COPAL CO LTD
发明人： SAKAMOTO TETSUO , KONO TAKANORI , UDAGAWA MASATAKA , KUROSU TOMIO
IPC分类号： G01B11/00
摘要： PURPOSE:To stabilize a light reception level in the operation of a movable member even if a source voltage varies by opening the optical path from a light emission part to a light reception part before the movable member begins to operate, and increasing the driving current of the light emission part so that the light reception level is a stationary level. CONSTITUTION:The optical path from the light emitting diode 2a of the projection part to the phototransistor 2b of the photodetection part is opened and closed with a slit provided associatively to the shutter blade 1 of the movable member and a signal level V1 obtained by the photodetection part is compared with a reference level V0 to detect the position of the blade 1 with the obtained pulse. At this time, the optical path from the light emission part to the light reception part is normally opened with the blade 1 and the voltage V1 generated by a resistance 3 is applied to the opposite-phase input of a comparator 4. Further, the reference voltage V0 generated by a resistance 6 is applied to the in-phase input of the comparator 4 by a constant current source 5. Then, those are compared to increase the driving current i0 of the diode 2a until the voltage V1 exceeds the voltage V0, and the current i0 is fixed at the point of time when the voltage V1 exceeds the V0.

8. 发明专利

JPS63241529A SERVO CONTROLLER FOR SHUTTER SPEED 失效
公开(公告)号：JPS63241529A
公开(公告)日：1988-10-06
申请号：JP7672787
申请日：1987-03-30
申请人： COPAL CO LTD
发明人： KUROSU TOMIO
IPC分类号： G03B7/087 , G03B7/10 , G03B9/10 , G03B9/24
摘要： PURPOSE:To permit arbitrary combination of an aperture diameter and exposing time at the time of exposure control by setting the value of a speed command signal at substantially 0 at an arbitrary timing during opening action, thereby stopping a shutter vane in common use as an aperture vane at an arbitrary position. CONSTITUTION:The shutter vane 13 acts to open when the rotating speed of a servo motor M is set at a positive speed. The vane acts to maintain an F value when the rotating speed of the motor M is set at 0 and the vane 13 acts to close when the rotating speed of the motor M is set at a negative speed. The value of the speed command signal is set at substantially 0 at the optional timing during the opening action, by which the vane 13 in common use as the aperture vane is stopped at a specified aperture diameter. The speed command signal is gently varied at the time when the vane 13 shifts from the opening action to a stop action. The exposure control at an arbitrary combination of the aperture diameter and exposing time is thereby permitted.

9. 发明专利

JPS61140929A External photometric type exposure control device 失效
标题翻译：外部光学类型接触控制装置
公开(公告)号：JPS61140929A
公开(公告)日：1986-06-28
申请号：JP26365584
申请日：1984-12-13
申请人： Copal Co Ltd
发明人： KUROSU TOMIO
IPC分类号： G03B7/087 , G03B9/24
摘要： PURPOSE: To prevent the generation of an exposure error caused by a variation of the running characteristic of a shutter blade by providing an aperture detecting means for detecting a variation of the aperture of a photographic lens, and correcting the charging characteristic of an integration circuit in accordance with its detecting means.
CONSTITUTION: The output of an operational amplifier 33 for constituting a photometric circuit 30 is connected to the ground through a transistor 35, and only when the transistor 35 is cut off, a charging operation of a capacitor 37 is executed. Accordingly, when a ratio of a cut-off time of the transistor 35 is raised by following the opening of a shutter blade 1, the charging characteristic of the capacitor 37 can be followed to the variation of the integral characteristic of an exposure quantity which follows an opening of the shutter blade. Therefore, by a pulse generated by a duty converting circuit 80, the transistor 35 is made to execute a switching operation, and also off-time of a pulse generated by the duty converting circuit 80 by following the rise of a counting value in a counter 20 is raised. Variation of the charging characteristic of the photometric circuit can be followed to the variation of an opening characteristic of the shutter blade, therefore, exposure control can be executed exactly.
COPYRIGHT: (C)1986,JPO&Japio
摘要翻译：目的：通过设置用于检测摄影镜头的孔径的变化的孔径检测装置，并且将积分电路的充电特性进行校正，以防止由快门叶片的运行特性的变化引起的曝光误差的产生根据其检测手段。构成：用于构成测光电路30的运算放大器33的输出通过晶体管35连接到地，并且只有当晶体管35截止时，才执行电容器37的充电操作。因此，当通过跟随快门叶片1的打开来提高晶体管35的截止时间的比率时，电容器37的充电特性可以遵循以下曝光量的积分特性的变化快门叶片的开口。因此，通过由占空比转换电路80产生的脉冲，使晶体管35执行开关操作，并且还通过跟随计数器的计数值的上升而由占空比转换电路80产生的脉冲的关断时间 20被提升。光敏电路的充电特性的变化可以跟随快门叶片的打开特性的变化，因此，可以精确地执行曝光控制。

10. 发明专利

JPS60652B2 失效
公开(公告)号：JPS60652B2
公开(公告)日：1985-01-09
申请号：JP4992376
申请日：1976-05-04
申请人： COPAL CO LTD
发明人： ISHIGURO YASUO , KUROSU TOMIO
IPC分类号： G03B19/18 , G03B17/00 , G03B21/36

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