JPS57151936A - Compensation device for back focus of copying machine for film - Google Patents

Compensation device for back focus of copying machine for film

Info

Publication number
JPS57151936A
JPS57151936A JP3829181A JP3829181A JPS57151936A JP S57151936 A JPS57151936 A JP S57151936A JP 3829181 A JP3829181 A JP 3829181A JP 3829181 A JP3829181 A JP 3829181A JP S57151936 A JPS57151936 A JP S57151936A
Authority
JP
Japan
Prior art keywords
lens
film
back focus
temperature
copying machine
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
JP3829181A
Other languages
Japanese (ja)
Inventor
Yoshiyuki Ishidate
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.)
Fujifilm Business Innovation Corp
Original Assignee
Fuji Xerox Co Ltd
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 Fuji Xerox Co Ltd filed Critical Fuji Xerox Co Ltd
Priority to JP3829181A priority Critical patent/JPS57151936A/en
Publication of JPS57151936A publication Critical patent/JPS57151936A/en
Pending legal-status Critical Current

Links

Classifications

    • G—PHYSICS
    • G03—PHOTOGRAPHY; CINEMATOGRAPHY; ANALOGOUS TECHNIQUES USING WAVES OTHER THAN OPTICAL WAVES; ELECTROGRAPHY; HOLOGRAPHY
    • G03F—PHOTOMECHANICAL PRODUCTION OF TEXTURED OR PATTERNED SURFACES, e.g. FOR PRINTING, FOR PROCESSING OF SEMICONDUCTOR DEVICES; MATERIALS THEREFOR; ORIGINALS THEREFOR; APPARATUS SPECIALLY ADAPTED THEREFOR
    • G03F7/00—Photomechanical, e.g. photolithographic, production of textured or patterned surfaces, e.g. printing surfaces; Materials therefor, e.g. comprising photoresists; Apparatus specially adapted therefor
    • G03F7/70—Microphotolithographic exposure; Apparatus therefor
    • G03F7/70216—Mask projection systems
    • G03F7/70241—Optical aspects of refractive lens systems, i.e. comprising only refractive elements
    • G—PHYSICS
    • G03—PHOTOGRAPHY; CINEMATOGRAPHY; ANALOGOUS TECHNIQUES USING WAVES OTHER THAN OPTICAL WAVES; ELECTROGRAPHY; HOLOGRAPHY
    • G03G—ELECTROGRAPHY; ELECTROPHOTOGRAPHY; MAGNETOGRAPHY
    • G03G15/00—Apparatus for electrographic processes using a charge pattern
    • G03G15/04—Apparatus for electrographic processes using a charge pattern for exposing, i.e. imagewise exposure by optically projecting the original image on a photoconductive recording material

Abstract

PURPOSE:To maintain the optimum in-focus state by fitting a temperature detector near a film mounting base and/or a projection lens, and compensating the back focus of the lens according to measured temperature. CONSTITUTION:Temperature detectors 11 and 12 send the temperature signals of a film 4 and a lens 7 to a controller 13, which calculates the distance of displacement between the lens and film at the measured temperatures, and then turns a motor 18 as much as the extent which corresponds to the displacement position to turns a flange 14 through a gear 19, thereby moving up and down a lens barrel 10 through the operation of a cam surface. Namely, the controller 13 compensates the back focus of the lens 7 by an extent due to thermal expansion.
JP3829181A 1981-03-17 1981-03-17 Compensation device for back focus of copying machine for film Pending JPS57151936A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP3829181A JPS57151936A (en) 1981-03-17 1981-03-17 Compensation device for back focus of copying machine for film

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP3829181A JPS57151936A (en) 1981-03-17 1981-03-17 Compensation device for back focus of copying machine for film

Publications (1)

Publication Number Publication Date
JPS57151936A true JPS57151936A (en) 1982-09-20

Family

ID=12521196

Family Applications (1)

Application Number Title Priority Date Filing Date
JP3829181A Pending JPS57151936A (en) 1981-03-17 1981-03-17 Compensation device for back focus of copying machine for film

Country Status (1)

Country Link
JP (1) JPS57151936A (en)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4974018A (en) * 1984-06-11 1990-11-27 Hitachi, Ltd. Exposure method and exposure apparatus

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4974018A (en) * 1984-06-11 1990-11-27 Hitachi, Ltd. Exposure method and exposure apparatus

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