JPS5778030A - Automatic exposure controlling device - Google Patents

Automatic exposure controlling device

Info

Publication number
JPS5778030A
JPS5778030A JP55154053A JP15405380A JPS5778030A JP S5778030 A JPS5778030 A JP S5778030A JP 55154053 A JP55154053 A JP 55154053A JP 15405380 A JP15405380 A JP 15405380A JP S5778030 A JPS5778030 A JP S5778030A
Authority
JP
Japan
Prior art keywords
signal
reference value
photosensitive materials
ray
exposure
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Pending
Application number
JP55154053A
Other languages
Japanese (ja)
Inventor
Tokuzou Komai
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Shimadzu Corp
Shimazu Seisakusho KK
Original Assignee
Shimadzu Corp
Shimazu Seisakusho KK
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by Shimadzu Corp, Shimazu Seisakusho KK filed Critical Shimadzu Corp
Priority to JP55154053A priority Critical patent/JPS5778030A/en
Publication of JPS5778030A publication Critical patent/JPS5778030A/en
Pending legal-status Critical Current

Links

Classifications

    • G—PHYSICS
    • G03—PHOTOGRAPHY; CINEMATOGRAPHY; ANALOGOUS TECHNIQUES USING WAVES OTHER THAN OPTICAL WAVES; ELECTROGRAPHY; HOLOGRAPHY
    • G03B—APPARATUS OR ARRANGEMENTS FOR TAKING PHOTOGRAPHS OR FOR PROJECTING OR VIEWING THEM; APPARATUS OR ARRANGEMENTS EMPLOYING ANALOGOUS TECHNIQUES USING WAVES OTHER THAN OPTICAL WAVES; ACCESSORIES THEREFOR
    • G03B27/00—Photographic printing apparatus
    • G03B27/72—Controlling or varying light intensity, spectral composition, or exposure time in photographic printing apparatus
    • G—PHYSICS
    • G03—PHOTOGRAPHY; CINEMATOGRAPHY; ANALOGOUS TECHNIQUES USING WAVES OTHER THAN OPTICAL WAVES; ELECTROGRAPHY; HOLOGRAPHY
    • G03B—APPARATUS OR ARRANGEMENTS FOR TAKING PHOTOGRAPHS OR FOR PROJECTING OR VIEWING THEM; APPARATUS OR ARRANGEMENTS EMPLOYING ANALOGOUS TECHNIQUES USING WAVES OTHER THAN OPTICAL WAVES; ACCESSORIES THEREFOR
    • G03B7/00—Control of exposure by setting shutters, diaphragms or filters, separately or conjointly
    • G03B7/08—Control effected solely on the basis of the response, to the intensity of the light received by the camera, of a built-in light-sensitive device

Landscapes

  • Physics & Mathematics (AREA)
  • General Physics & Mathematics (AREA)
  • Spectroscopy & Molecular Physics (AREA)
  • Radiography Using Non-Light Waves (AREA)
  • Control Of Exposure In Printing And Copying (AREA)
  • Exposure Control For Cameras (AREA)

Abstract

PURPOSE:To exposure photosensitive materials to make materials always provided with prescribed photographic densities irrespectively of exposure time, by compensating the referential set value of the automatic exposure controlling device by generating a signal which compensates declines in the photographic density of photosensitive materials. CONSTITUTION:When an X-ray irradiate signal is impressed upon a controlling device 8 from an X-ray generating device, the counter of the device 8 starts working and an address of an ROM of a memory section 7 forming a compensate signal generating means is assigned. When the address is assigned, the reference value compensation information read out from the memory section 7 is added to a reference value setting section 3 through a D/A converter 6, and the set reference value is compensated through tip selections of the memory section 7 by an information setting 9 in accordance with declines in the photographic density of photosensitive materials of reciprocity law failure. Then, the compensated set reference value becomes a reference signal for a comparator 4, to which a detect signal corresponding to the strength of the X-ray passing through the subject is added, and generations of an X-ray stop signal is controlled. Therefore, automatic exposure controls are performed so that photosensitive materials may be exposed to always have prescribed photographic densities irrespective of exposure times.
JP55154053A 1980-10-31 1980-10-31 Automatic exposure controlling device Pending JPS5778030A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP55154053A JPS5778030A (en) 1980-10-31 1980-10-31 Automatic exposure controlling device

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP55154053A JPS5778030A (en) 1980-10-31 1980-10-31 Automatic exposure controlling device

Publications (1)

Publication Number Publication Date
JPS5778030A true JPS5778030A (en) 1982-05-15

Family

ID=15575877

Family Applications (1)

Application Number Title Priority Date Filing Date
JP55154053A Pending JPS5778030A (en) 1980-10-31 1980-10-31 Automatic exposure controlling device

Country Status (1)

Country Link
JP (1) JPS5778030A (en)

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4924260A (en) * 1987-06-23 1990-05-08 Polaroid Corporation Exposure system of image forming apparatus
WO1993013456A1 (en) * 1987-06-23 1993-07-08 Kenichi Shimizu Exposure device of image formation apparatus
WO1993013455A1 (en) * 1987-06-23 1993-07-08 Kenichi Shimizu Exposure device of image formation apparatus

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4924260A (en) * 1987-06-23 1990-05-08 Polaroid Corporation Exposure system of image forming apparatus
WO1993013456A1 (en) * 1987-06-23 1993-07-08 Kenichi Shimizu Exposure device of image formation apparatus
WO1993013455A1 (en) * 1987-06-23 1993-07-08 Kenichi Shimizu Exposure device of image formation apparatus

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