GB2111714B - Determining the focal length of a projection lens in a copier - Google Patents

Determining the focal length of a projection lens in a copier

Info

Publication number
GB2111714B
GB2111714B GB08233337A GB8233337A GB2111714B GB 2111714 B GB2111714 B GB 2111714B GB 08233337 A GB08233337 A GB 08233337A GB 8233337 A GB8233337 A GB 8233337A GB 2111714 B GB2111714 B GB 2111714B
Authority
GB
United Kingdom
Prior art keywords
copier
determining
focal length
projection lens
lens
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.)
Expired
Application number
GB08233337A
Other versions
GB2111714A (en
Inventor
Toshikatsu Takahashi
Yoshiyuki Ishitate
Hiromitsu Okada
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.)
Tokyo Kogaku Kikai KK
Tokyo Optical Co Ltd
Fujifilm Business Innovation Corp
Original Assignee
Fuji Xerox Co Ltd
Tokyo Kogaku Kikai KK
Tokyo Optical 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, Tokyo Kogaku Kikai KK, Tokyo Optical Co Ltd filed Critical Fuji Xerox Co Ltd
Publication of GB2111714A publication Critical patent/GB2111714A/en
Application granted granted Critical
Publication of GB2111714B publication Critical patent/GB2111714B/en
Expired legal-status Critical Current

Links

Classifications

    • 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
    • G03G15/041—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 with variable magnification

Landscapes

  • Physics & Mathematics (AREA)
  • General Physics & Mathematics (AREA)
  • Variable Magnification In Projection-Type Copying Machines (AREA)
  • Exposure Or Original Feeding In Electrophotography (AREA)
  • Optical Systems Of Projection Type Copiers (AREA)
GB08233337A 1981-12-14 1982-11-23 Determining the focal length of a projection lens in a copier Expired GB2111714B (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP20134481A JPS58102252A (en) 1981-12-14 1981-12-14 Continuous magnification varying method for copying machine

Publications (2)

Publication Number Publication Date
GB2111714A GB2111714A (en) 1983-07-06
GB2111714B true GB2111714B (en) 1985-08-14

Family

ID=16439469

Family Applications (1)

Application Number Title Priority Date Filing Date
GB08233337A Expired GB2111714B (en) 1981-12-14 1982-11-23 Determining the focal length of a projection lens in a copier

Country Status (2)

Country Link
JP (1) JPS58102252A (en)
GB (1) GB2111714B (en)

Families Citing this family (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPH075480Y2 (en) * 1990-09-27 1995-02-08 株式会社東芝 Image forming device

Also Published As

Publication number Publication date
GB2111714A (en) 1983-07-06
JPH0225511B2 (en) 1990-06-04
JPS58102252A (en) 1983-06-17

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Legal Events

Date Code Title Description
PCNP Patent ceased through non-payment of renewal fee

Effective date: 19951123