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    EXPOSURE METER
    61.
    发明专利
    EXPOSURE METER 失效

    公开(公告)号：JPS60220830A

    公开(公告)日：1985-11-05

    申请号：JP3117585

    申请日：1985-02-18

    Applicant: MINOLTA CAMERA KK

    Inventor： YUASA YOSHIO

    IPC: G01J1/44 ,  G03B7/091

    Abstract: PURPOSE:To display data corresponding to an aperture value, etc., calculated by an arithmetic means when respective modes are selected and displays corresponding data calculated by the arithmetic means when the mode is selected. CONSTITUTION:A photometry circuit 4 integrates an output current with a photometry start signal from a terminal (c) of an I/O port 3 and outputs a signal for breaking a detecting circuit 31. The photometric operation is stopped with a signal from a terminal (b) of the I/O port 3. A strobe 32 receives a signal from a terminal (c) and emits light. Then, TV33 outputs a signal corresponding to the apex value of a set shutter speed to the I/O port 3. An SV setting circuit 34 outputs a signal corresponding to the set apex value. A mode 35 outputs a digital signal corresponding to a mode to the port 3. A flow chart is stored in ROM2. Thus, an aperture value and an exposure value are displayed on a single display part selectively, and a measurement of contrast based upon an exposure value is easily taken with the simple, compact constitution.

    LIGHT METERING DEVICE FOR FLASH PHOTOGRAPHY
    62.
    发明专利
    LIGHT METERING DEVICE FOR FLASH PHOTOGRAPHY 失效

    公开(公告)号：JPS60162926A

    公开(公告)日：1985-08-24

    申请号：JP1789784

    申请日：1984-02-02

    Applicant: MINOLTA CAMERA KK

    Inventor： YUASA YOSHIO ,  NARUSE KAZUHIKO ,  INABA MASAHITO

    IPC: G01J1/42 ,  G03B15/05

    Abstract: PURPOSE:To easily decide whether contrast before photography is normal or not by displaying information on proper exposure as to plural parts of a subject simultaneously as position information on the same exposure scale. CONSTITUTION:Light metered values at the 1st-the 3rd positions of the subject are detected successively by a photodetection part (a), whose output is integrated by an integral arithmetic part (b) to calculates the quantity of flash light and the quantity of stationary light. Those values are stored in flash light quantity memory parts (d), (g), and (h) and stationary light memory parts (c), (f), and (i). Further, exposure arithmetic parts (e), (h), and (k) calculate exposure at each position and those values are displayed at the same display part (l).

    FLASH EMITTING DEVICE
    63.
    发明专利
    FLASH EMITTING DEVICE 失效

    公开(公告)号：JPS58149033A

    公开(公告)日：1983-09-05

    申请号：JP3324682

    申请日：1982-03-02

    Applicant: MINOLTA CAMERA KK

    Inventor： YOSHIYAMA ICHIROU ,  YUASA YOSHIO ,  TANIGUCHI NOBUYUKI ,  ISHIKAWA NORIO

    IPC: G03B15/05 ,  G03B33/00

    Abstract: PURPOSE:To illuminate light of the color temp. or spectral distribution characteristics conforming to the conditions of use in either case when a flash emitting device is used as a main light source or as an auxiliary light source, by controlling the quantity of the light to be emitted by each light emitting source so as to provide the quantity of the light corresponding to the results of arithmetic operations for the ratio of the quantity of emission light to be emitted from each light emitting source according to the color temp. data of an object or a film while providing the plural light emitting sources having mutually different spectral characteristics for emission light. CONSTITUTION:The X contact S3 of a camera is connected through terminals JB2, JS2 and an inverter IN4 to the input terminal of a one-shot circuit OS4 in a control circuit 13 for light emission, and the output terminal of the circuit OS4 is connected to one input terminal of an AND gate AN1. The output terminal of a detecting circuit 8 for completion of charging is connected to the other input terminal of the AND gate AN1. A +V power source is connected through a resistor to the connection point of the terminal JS2 and the inverter IN4. The output terminal of the AND gate AN1 is connected to the set input terminals of a flip-flop FF0 and a flip-flop FF1 respectively.

    FLASHLIGHT PHOTOGRAPHING PHOTOMETRIC DEVICE
    64.
    发明专利
    FLASHLIGHT PHOTOGRAPHING PHOTOMETRIC DEVICE 失效

    公开(公告)号：JPS5666835A

    公开(公告)日：1981-06-05

    申请号：JP14344479

    申请日：1979-11-05

    Applicant: MINOLTA CAMERA KK

    Inventor： TANIGUCHI NOBUYUKI ,  YUASA YOSHIO ,  ISHIKAWA NORIO

    IPC: G03B7/28 ,  G01J1/42 ,  G01J1/44 ,  G03B7/16 ,  G03B15/05

    Abstract: PURPOSE:To make it possible to calculate an exposure time in case of flashlight photographing in accordance with the aperture value which has been set, by deciding in advance and storing the quantity of emitted light corresponding to only a flashlight at the time when a flashlight is emitted. CONSTITUTION:When a flashlight is emitted by the flashlight device by operating the switch S0, FETFT8 is turned off, and the integral capacitor C2 integrates only the AC current component which passes through HPF formed by the capacitor C0, R2 by only a flashlight in the photometric detection current passing through the operational amplfier OA2 for logarithmic conversion. This integral value is stored in the register 32 through the A/D converter, etc., is processed by the arith metic circuit 4 together with the set point by the exposure setting circuit 20 and the film sensitivity setting circuit 22, and the photometric quantity of stationary light at the time when a flashlight applied to the register 30 is not emitted, and a flashlight is not emitted each time, and a proper exposure time in case of flashlight emission photographing is calculated and decided.

    PHOTOMETRIC METHOD FOR FLASH PHOTOGRAPHY AND ITS DEVICE
    65.
    发明专利
    PHOTOMETRIC METHOD FOR FLASH PHOTOGRAPHY AND ITS DEVICE 失效

    公开(公告)号：JPS5660418A

    公开(公告)日：1981-05-25

    申请号：JP13720979

    申请日：1979-10-23

    Applicant: MINOLTA CAMERA KK

    Inventor： TANIGUCHI NOBUYUKI ,  ISHIKAWA NORIO ,  YUASA YOSHIO

    IPC: G03B7/28 ,  G01J1/42 ,  G01J1/44 ,  G03B7/16 ,  G03B15/05

    Abstract: PURPOSE:To obtain a correct flash exposure time taking flash and stationary light into consideration by making predetermined operations based on flash emission quantity, stationary light intensity, aperture value, film sensitivity, etc. and calculating and displaying exposure specifications. CONSTITUTION:An arithmetic circuit 10 makes required addition and subtraction operations including the readout of data from ROMs 32, 36, according to the outputs of a measured output register 7 of only the stationary light, an APEX value output circuit 9, film sensitivity, aperture value setting circuits 25, 26, and a subtrator 15 for emission data output of only the flash. The exposure specifications corresponding to the correct exposure time TVX by steady light from an adder 33, the lighting contrast DELTA5 from a subtractor 35, and aperture set value or the like such as the correct flash emission quantity QVt from an adder 37 are displayed in a display device 27. Hence, the flash photography correct exposure time etc. taking stationary light into consideration based on these displays are determined according to the preset aperture value etc.

    PHOTOMETRIC DEVICE
    66.
    发明专利
    PHOTOMETRIC DEVICE 失效

    公开(公告)号：JPS5492233A

    公开(公告)日：1979-07-21

    申请号：JP15768577

    申请日：1977-12-29

    Applicant: MINOLTA CAMERA KK

    Inventor： YUASA YOSHIO

    IPC: G01J1/44 ,  G01J1/46 ,  G03B7/091

    Abstract: PURPOSE:To achieve miniaturization and enable even pulse light of a short light emission to be surely measured by using a microcomputer as a control system in the photometric device of integration type. CONSTITUTION:For example, in the case of light trigger type, the light emitted by a strobe 2 is converted to an electric signal by a photo detecror 3. A detection circuit 6 detects the rise of this emitted light and applies a control signal to a photometric circuit 4, then in the photometric circuit, integration of the signals from the photodetector 3 is started. On the other hand, the signal of the detection circuit 6 is applied to a microcomputer 1 and after lapse of specified seconds the integration operation is stopped. The result of the integration, i.e., the measured value of the quantity of the light emitted by the strobe 2 is applied to an A/D converter 7, the photometric value having been converted to a digital signal by which is then applied to the microcomputer 1, where the aperture value or the like is calculated according to parameters such as exposure time, etc. and is then displayed.

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