公开(公告)号：JPS632045B2

公开(公告)日：1988-01-16

申请号：JP15475379

申请日：1979-11-28

Applicant: MINOLTA CAMERA KK

Inventor： YUASA YOSHIO ,  ISHIKAWA NORIO ,  HORIE IZUMI

IPC: G01J3/50 ,  G01J3/51

公开(公告)号：JPS6235046B2

公开(公告)日：1987-07-30

申请号：JP9960879

申请日：1979-08-04

Applicant: MINOLTA CAMERA KK

Inventor： YUASA YOSHIO

IPC: G01J3/50 ,  G01J3/51

公开(公告)号：JPS62161022A

公开(公告)日：1987-07-17

申请号：JP26606986

申请日：1986-11-07

Applicant: MINOLTA CAMERA KK

Inventor： NARUSE KAZUHIKO ,  YUASA YOSHIO

IPC: G01J1/42 ,  G01J1/44

Abstract: PURPOSE:To make it possible to simply determine a state capable of obtaining proper exposure with good accuracy even when a shutter speed and a lens opening value were determined, by measuring light the containing a flash light component in a state separated into the quantity of steady light and that of flash light. CONSTITUTION:Photometric means C1, C2 measure light containing a flash light component in a state separated into the quantity of steady light and flash light. Shutter speed setting means SW3, SW4, SW13 set shutter speeds and a lens opening value setting means SW3, SW4, SW13 set lens opening values. Quantity of exposure for obtaining proper exposure is calculated from the each set shutter speed and each set lens opening value by an exposure quantity calculation means CPU. The quantity of deviation of the calculated quantity of exposure with the photometric quantity means by each of the photometric means C1, C2 is calculated by a deviation calculating means CPU. Then the ratio of the calculated quantity of exposure and the quantity of flash light measured by the means C1, C2 is calculated by a ratio calculating means CPU to be displayed on a display means LCD. By this method, the excess and deficiency of the quantity of flash light to proper exposure is displayed in terms of a ratio.

公开(公告)号：JPS6236651A

公开(公告)日：1987-02-17

申请号：JP8529085

申请日：1985-04-20

Applicant: MINOLTA CAMERA KK

Inventor： NARUSE KAZUHIKO ,  YUASA YOSHIO ,  INABA MASAHITO

IPC: G03B17/18 ,  G01J1/42

Abstract: PURPOSE:To display a exposing data with high resolution by selecting the display of a scale at the display of the exposing data. CONSTITUTION:Outputs from a photometric circuit 1001, an exposure time setting device 102, an ISO setting device 103, and a relative G number setting device 104 are supplied to an arithmetic circuit 105 and 8-bit exposure information is calculated. When a switch SW21 is closed a switching device 1015 turns a scale display part 1012 to a display state and a decoder 1014 displays dots corresponding to a diaphragm value to be displayed. When the SW21 is opened, the device 1015 turns a scale display part 1013 to a display state to display dots corresponding to a diaphragm value to be displayed. If the SW20 and SW21 are turned on and off respectively, wide range display using the scale 1012 and a fine diaphragm value display using the scale 1013 can be attained.

公开(公告)号：JPS6133123B2

公开(公告)日：1986-07-31

申请号：JP8427878

申请日：1978-07-10

Applicant: MINOLTA CAMERA KK

Inventor： YUASA YOSHIO ,  ISHIKAWA NORIO ,  TANIGUCHI NOBUYUKI

IPC: G01J1/44 ,  G03B7/091

公开(公告)号：JPS5954196A

公开(公告)日：1984-03-28

申请号：JP16283182

申请日：1982-09-18

Applicant: Minolta Camera Kk

Inventor： YUASA YOSHIO ,  NARUSE KAZUHIKO ,  INABA MASAHITO

IPC: G03B15/05 ,  H05B41/34

公开(公告)号：JPS58100843A

公开(公告)日：1983-06-15

申请号：JP20049681

申请日：1981-12-11

Applicant: MINOLTA CAMERA KK

Inventor： YUASA YOSHIO ,  YASUMOTO HIDETOSHI ,  KAWAGOE NOBUKAZU ,  NARUSE KAZUHIKO ,  INABA MASAHITO

IPC: G03B27/72

Abstract: PURPOSE:To make a titled device small-sized, to control the quantity of light emission with high accuracy, and also to shorten one exposure time, by controlling the quantity of light emission per once of a pulse light source, and the number of times of light emission, in accordance with an exposure quantity data which is set manually or automatically. CONSTITUTION:A light emission control part 1 controls a light emitting tube 3, and emitted light of the tube 3 is reflected by a mirror 5, transmits a negative film 7, and is projected and forms an image on an easel surface 11 through a lens 9. In this case, an exposure quantity data output part 13 supplies data of exposure quantity which is set manually or automatically, to an operating part 15. The operating part 15 decides the first unit light emission quantity approximating to a value which has divided the total light emission quantity corresponding to the exposure quantity data, by a suitable number, emits light by a suitable number of times by its light emission quantity, and when the remaining quantity which has subtracted the product of its light emission quantity and the number of time of light emission, from the total light emission quantity, the light emission quantity per once is varied by a small quantity, and the total number of times of light emission becomes the same extent at all times irrespective of the total light emission quantity.

公开(公告)号：JPS56167131A

公开(公告)日：1981-12-22

申请号：JP7115580

申请日：1980-05-27

Applicant: MINOLTA CAMERA KK

Inventor： YUASA YOSHIO ,  TANIGUCHI NOBUYUKI

IPC: G03B7/28 ,  G03B17/18

Abstract: PURPOSE:To enable one display device to display both an exposure control value in normal photography and that with which photographing is to be done, by using continuous lighting display for one value and flashing display for the other. CONSTITUTION:An operational amplifier OA3 outputs a potential which corresponds to an exposure time of normal photography, ane an amplifier OA4 a potential which corresponds to an exposure time of override photography. Both the potentials are supplied alternately to comparators AC1-ACn to be compared. Outputs of those comparators are supplied to a logical circuit 3 and for the normal photography, one of LEDs LD1-LDn+1 which corresponds to the exponds to the exposure control value of the normal photography is turned on continuously. For the override photography, one LED which corresponds to the exposure control value flashes and one LED which corresponds to that of the normal photography is turned on continuously. In addition, AE lock photography is the same.

公开(公告)号：JPS5677825A

公开(公告)日：1981-06-26

申请号：JP15391379

申请日：1979-11-27

Applicant: MINOLTA CAMERA KK

Inventor： YUASA YOSHIO ,  NARUSE KAZUHIKO

IPC: G03B7/28 ,  G01J1/44

Abstract: PURPOSE:To obtain proper exposure that corresponds to the purpose of photographing by generating an exposure factor signal with which a subject part, measured according to a spot photometric value, to be reproduced nearly at the limit density of film latitude. CONSTITUTION:When memory switch 15 is closed in order to obtain an exposure value with which a measured area is reproduced at the upper end of film latitude, the output of counter block 17 is inverted to a high level and memory 22 in memory block 21 is selected. With switch 31 closed, a digital spot measurement logarithmic conversion value stored in memory 22 is processed for subtraction by adjusting circuit 28 with set data that corresponds to nearly a half film latitude of exposure factor stage-number difference signal outputting method 35. This subtraction-processed photometric information data is latched by latch circuit 55 via data selecting circuit 61 and the exposure signal with which the measured area is reproduced at the upper end of the film latitude is determined through arithmetic circuit 56. Similarly, proper exposure with which it is reproduced at the lower limit of the film latitude can be obtained according to the purpose of photographing.

公开(公告)号：JPS5666834A

公开(公告)日：1981-06-05

申请号：JP14246779

申请日：1979-11-02

Applicant: MINOLTA CAMERA KK

Inventor： YUASA YOSHIO ,  TANIGUCHI NOBUYUKI ,  ISHIKAWA NORIO

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

Abstract: PURPOSE:To make it possible to execute a simple and swift photographing, by deciding a proper aperture value in case of flashlight photographing, in accordance with the photometric signal corresponding to only a stationary light and a flashlight by the high-pass filter. CONSTITUTION:When the switch S0 is closed and a flashlight is emitted from the flashlight emitting device 7, FETFT8 is turned off, and the capacitor C2 starts electric charge. An AC photometric component current by a flashlight only in the set point by the photodetector PD and the operational amplifier OA2 for logarithmic conversion is supplied to this capacitor C2 through HPF formed by the capacitor C0, the resistance R2, etc. And the photometric quantity of light by only a flashlight through the A/D converter 1, the demultiplexer, etc. is stored in the register 32. At the time of photographing, the arithmetic circuit 4 does not emit a flashlight each time but decides a proper aperture value in case of flashlight photographing, in accordance with the set points of the exposure time setting circuit 20 and the film sensitivity setting circuit 22, the photometric value of a stationary light, etc., based on the stored value of the register 32. Accordingly, a flaslight photographing can be executed swiftly by means of a simple operation.