公开(公告)号：DE1816913A1

公开(公告)日：1969-08-28

申请号：DE1816913

申请日：1968-12-24

Applicant: MINOLTA CAMERA KK

Inventor： YUASA YOSHIO

IPC: G01J3/51 ,  G03B27/73 ,  G03B33/00 ,  G01J3/48

Abstract: 1,230,228. Colour printing exposure control. MINOLTACAMERA K.K. Dec. 30, 1968, [Dec. 28, 1967], No. 61786/68. Heading G2A. An exposure control system for a colour printer has red, green and blue light detectors R 1-n , G 1-n , B 1-n associated with individual regions A 1-n of the printing plane, the detectors corresponding to each colour being connected in series so that the harmonic mean of the light intensity of each colour in each region may be measured. A switch 12 selectively connects the different colour detectors to a measuring instrument 11 and a power source 10. A diffuser 2À3 may receive the image of a colour negative 1. The individual detectors may be colour sensitive corresponding to the sensitivity of the printing paper, or a combination of filters and photo-conductive cells may be used. The information derived from the measuring system may be used to select colour compensating filters, or to adjust the diaphragm aperture or exposure time of the printing light. The system produces prints in which the high light areas have strictly controlled colour balance, i.e. those regions corresponding to the denser regions of the negative. A mathematical treatment of the system is given in comparison to a conventional system in which a parallel connection of the individual detectors is used.

公开(公告)号：GB2120403B

公开(公告)日：1986-08-06

申请号：GB8305584

申请日：1983-03-01

Applicant: MINOLTA CAMERA KK

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

IPC: G03B15/05 ,  G03B33/00

Abstract: In an electronic flash device for use in a still camera, a calculation circuit means calculates a ratio of the amounts of light to be emitted by a plurality of flash light tubes on the basis of color temperature information and control circuit means controls the emission of light of the respective flash light tubes in such a manner that the ratio of light amount emitted from the respective flash light tubes corresponds to the ratio calculated by the calculation circuit means.

公开(公告)号：DE3333560A1

公开(公告)日：1984-03-22

申请号：DE3333560

申请日：1983-09-16

Applicant: MINOLTA CAMERA KK

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

IPC: G03B27/46 ,  G03B27/73 ,  G03B27/52

Abstract: An enlarger for copying a film is provided having two modes of operation. A first mode of operation permits preliminary adjustment of the focus of the lens system while the second mode of operation permits an actual exposure, the first mode of operation being inhibited during the actual exposure of the film in the second mode.

公开(公告)号：DE3330527A1

公开(公告)日：1984-03-01

申请号：DE3330527

申请日：1983-08-24

Applicant: MINOLTA CAMERA KK

Inventor： YUASA YOSHIO ,  KAWAGOE NOBUKAZU

IPC: G03B27/32 ,  G03B27/73

Abstract: An enlarger having a light emitting device is provided wherein the amount and color balance of light to be emitted are controlled. The operator can set the amount and color balance of light. The enlarger can measure the amount and color balance of light at a plurality of points within a predetermined plane in which the printing paper is to be located. A first mode of operation can be set which presumes a predetermined standard film set in the enlarger and a second mode of operation can be set wherein a film to be printed is placed in the enlarger. The enlarger is capable of averaging a measured signal to determine an average amount and an average color balance of light wherein these measurements can be utilized to determine a proper amount and color balance of light to be received at the predetermined plane during an enlarging operation.

公开(公告)号：GB2118313A

公开(公告)日：1983-10-26

申请号：GB8305600

申请日：1983-03-01

Applicant: MINOLTA CAMERA KK

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

IPC: G03B27/72 ,  G03B27/73

Abstract: Disclosed herein is a light measuring and control data calculating device for use in a photographic enlarger. The device comprises first light detecting means for detecting the amount of light emitted from a light source, second light detecting means for detecting the emitted light amount at a position on the surface of an easel through the optical system and an original film in the enlarger, setting means for manually setting a preliminary desired amount of light to be emitted from the light source and calculation means for calculating an actually desired amount of flash light to be emitted from the light source for obtaining a desired total amount of the exposure light on the surface of the easel for making a suitable exposure on the printing paper to provide a best print.

公开(公告)号：DE3307350A1

公开(公告)日：1983-09-08

申请号：DE3307350

申请日：1983-03-02

Applicant: MINOLTA CAMERA KK

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

IPC: G03B27/72 ,  G03B27/73

Abstract: Disclosed herein is a light measuring and control data calculating device for use in a photographic enlarger. The device comprises first light detecting means for detecting the amount of light emitted from a light source, second light detecting means for detecting the emitted light amount at a position on the surface of an easel through the optical system and an original film in the enlarger, setting means for manually setting a preliminary desired amount of light to be emitted from the light source and calculation means for calculating an actually desired amount of flash light to be emitted from the light source for obtaining a desired total amount of the exposure light on the surface of the easel for making a suitable exposure on the printing paper to provide a best print.

公开(公告)号：GB2105874A

公开(公告)日：1983-03-30

申请号：GB8220649

申请日：1982-07-16

Applicant: MINOLTA CAMERA KK

Inventor： YUASA YOSHIO

IPC: G03B27/72 ,  G03G15/043

Abstract: An exposure amount indicating arrangement for use with a photographic printing apparatus or the like, which includes an exposure amount setting section for setting values corresponding to desired printing exposure amount, an elapsed exposure amount output section for successively outputting values corresponding to elapsed exposure amount from starting of the printing, a calculating section for working out a ratio of the elapsed exposure amount to the set exposure amount, and an informing section for visually or acoustically indicating the ratio of the elapsed exposure amount to the set exposure amount, based on the value worked out by the calculating section.

公开(公告)号：DE3279992D1

公开(公告)日：1989-11-23

申请号：DE3279992

申请日：1982-12-09

Applicant: MINOLTA CAMERA KK

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

IPC: G03B27/72 ,  G03B15/05

Abstract: PCT No. PCT/JP82/00462 Sec. 371 Date Aug. 9, 1983 Sec. 102(e) Date Aug. 9, 1983 PCT Filed Dec. 9, 1982 PCT Pub. No. WO83/02171 PCT Pub. Date Jun. 23, 1983.An exposure light source device wherein a control circuit 1 controls a light source for emitting pulse lights, with respect to the member of light emissions and the amount of light emitted at each time. The light source device is particularly useful for color additive type photographic color enlarger. When the device is used in such an enlarger, the number of light emission and each emitted light amount is determined such that the exposure time is approximately the same regardless of the total amount of exposure.

公开(公告)号：GB2105874B

公开(公告)日：1985-09-18

申请号：GB8220649

申请日：1982-07-16

Applicant: MINOLTA CAMERA KK

Inventor： YUASA YOSHIO

IPC: G03B27/72 ,  G03G15/043

Abstract: An exposure amount indicating arrangement for use with a photographic printing apparatus or the like, which includes an exposure amount setting section for setting values corresponding to desired printing exposure amount, an elapsed exposure amount output section for successively outputting values corresponding to elapsed exposure amount from starting of the printing, a calculating section for working out a ratio of the elapsed exposure amount to the set exposure amount, and an informing section for visually or acoustically indicating the ratio of the elapsed exposure amount to the set exposure amount, based on the value worked out by the calculating section.

公开(公告)号：DE3307369A1

公开(公告)日：1983-09-08

申请号：DE3307369

申请日：1983-03-02

Applicant: MINOLTA CAMERA KK

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

IPC: G03B15/05 ,  G03B33/00

Abstract: In an electronic flash device for use in a still camera, a calculation circuit means calculates a ratio of the amounts of light to be emitted by a plurality of flash light tubes on the basis of color temperature information and control circuit means controls the emission of light of the respective flash light tubes in such a manner that the ratio of light amount emitted from the respective flash light tubes corresponds to the ratio calculated by the calculation circuit means.