JPS57104923A - Aggregate optical system of copying machine - Google Patents

Aggregate optical system of copying machine

Info

Publication number
JPS57104923A
JPS57104923A JP18128880A JP18128880A JPS57104923A JP S57104923 A JPS57104923 A JP S57104923A JP 18128880 A JP18128880 A JP 18128880A JP 18128880 A JP18128880 A JP 18128880A JP S57104923 A JPS57104923 A JP S57104923A
Authority
JP
Japan
Prior art keywords
lens
image
diameter
projected
focal length
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
JP18128880A
Other languages
Japanese (ja)
Inventor
Hideharu Takei
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 JP18128880A priority Critical patent/JPS57104923A/en
Publication of JPS57104923A publication Critical patent/JPS57104923A/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
    • G03B27/32—Projection printing apparatus, e.g. enlarger, copying camera
    • G03B27/52—Details
    • G03B27/54—Lamp housings; Illuminating means
    • G03B27/542—Lamp housings; Illuminating means for copying cameras, reflex exposure lighting

Abstract

PURPOSE:To obtain a projection lens system of unmagnification correct image comprising the lens arrays of the same structure constructed in three tiers, by increasing the f/D value. CONSTITUTION:An image of an original 7 is projected to a photoreceptor 12 through a lens system comprising pairs of lens arrays 2, 4 and 2a. In this case, a continuous image is not obtainable unless an original part (M.N) larger than the lens diameter is projected for a lens among the objective lenses 2. In the same way, a lens in an image forming lens 2a projects a region (M'.N') larger than the lens diameter. A lens in a relay lens 4 usually has a smaller diameter to treat the images stored within a light masking plate 3. Accordingly, the focal length of the lens in the ens 4 is smaller than the objective lens 2 and the image forming lens 2a. However, a good image can be obtained although the three lenses are combined together with the same lens array by setting the f/D value (f: focal length; D: aperture diameter) at >=4. Thus the structure can be simplified.
JP18128880A 1980-12-23 1980-12-23 Aggregate optical system of copying machine Pending JPS57104923A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP18128880A JPS57104923A (en) 1980-12-23 1980-12-23 Aggregate optical system of copying machine

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP18128880A JPS57104923A (en) 1980-12-23 1980-12-23 Aggregate optical system of copying machine

Publications (1)

Publication Number Publication Date
JPS57104923A true JPS57104923A (en) 1982-06-30

Family

ID=16098059

Family Applications (1)

Application Number Title Priority Date Filing Date
JP18128880A Pending JPS57104923A (en) 1980-12-23 1980-12-23 Aggregate optical system of copying machine

Country Status (1)

Country Link
JP (1) JPS57104923A (en)

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US5150259A (en) * 1990-07-30 1992-09-22 Mitsubishi Rayon Company Ltd. Optical imaging device
JP2005122041A (en) * 2003-10-20 2005-05-12 Ricoh Opt Ind Co Ltd Light source apparatus

Citations (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS498893A (en) * 1972-05-23 1974-01-25

Patent Citations (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS498893A (en) * 1972-05-23 1974-01-25

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US5150259A (en) * 1990-07-30 1992-09-22 Mitsubishi Rayon Company Ltd. Optical imaging device
JP2005122041A (en) * 2003-10-20 2005-05-12 Ricoh Opt Ind Co Ltd Light source apparatus
JP4495942B2 (en) * 2003-10-20 2010-07-07 リコー光学株式会社 Imaging optical system, image forming apparatus, printer and image reading apparatus

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