JPS55100520A - Magnifying image formation lens - Google Patents

Magnifying image formation lens

Info

Publication number
JPS55100520A
JPS55100520A JP855479A JP855479A JPS55100520A JP S55100520 A JPS55100520 A JP S55100520A JP 855479 A JP855479 A JP 855479A JP 855479 A JP855479 A JP 855479A JP S55100520 A JPS55100520 A JP S55100520A
Authority
JP
Japan
Prior art keywords
lens
directed
lenses
faces
whose
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.)
Granted
Application number
JP855479A
Other languages
Japanese (ja)
Other versions
JPS5713848B2 (en
Inventor
Koichi Shinohara
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.)
Ricoh Co Ltd
Original Assignee
Ricoh 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 Ricoh Co Ltd filed Critical Ricoh Co Ltd
Priority to JP855479A priority Critical patent/JPS55100520A/en
Publication of JPS55100520A publication Critical patent/JPS55100520A/en
Publication of JPS5713848B2 publication Critical patent/JPS5713848B2/ja
Granted legal-status Critical Current

Links

Abstract

PURPOSE: To achieve higher performance by specifically arraying 5 groups and 6 elements of lenses.
CONSTITUTION: The 1st, 2nd group lenses 1, 2 consisting of convex meniscus lenses whose respective convex faces are directed to the image side, the 3rd group lens consisting of a concave meniscus lens whose convex face is directed to the image side, the 4th group lens consisting of a biconcave lens 4a whose face of a larger curvature is directed to the object side and a biconvex lens 4b which is cemented to this and whose face of a larger curvature is directed to the object side and the 5th group lens consisting of a biconvex lens whose face of a larger curvature is directed to the object side are let to satisfy condition formulas (1)W(8) where the composite focal length f is made 100, r1Wrn are let the radius of curvature of the respective faces, d1Wdn the spacings between the faces of the respective lenses, n1Wn6 the refractive indices of the respective glasses, V1WV6 the Abbe numbers of the respective glasses and f1Wf11 the focal lengths up to the respective faces. Thereby, the contrast of images may be enhanced while the aperture efficiency of the lens is being kept 100%.
COPYRIGHT: (C)1980,JPO&Japio
JP855479A 1979-01-26 1979-01-26 Magnifying image formation lens Granted JPS55100520A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP855479A JPS55100520A (en) 1979-01-26 1979-01-26 Magnifying image formation lens

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP855479A JPS55100520A (en) 1979-01-26 1979-01-26 Magnifying image formation lens

Publications (2)

Publication Number Publication Date
JPS55100520A true JPS55100520A (en) 1980-07-31
JPS5713848B2 JPS5713848B2 (en) 1982-03-19

Family

ID=11696328

Family Applications (1)

Application Number Title Priority Date Filing Date
JP855479A Granted JPS55100520A (en) 1979-01-26 1979-01-26 Magnifying image formation lens

Country Status (1)

Country Link
JP (1) JPS55100520A (en)

Cited By (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4376571A (en) * 1980-06-06 1983-03-15 Canon Kabushiki Kaisha Photographic small size objective
US4390251A (en) * 1980-09-03 1983-06-28 Canon Kabushiki Kaisha Photographic objectives of relatively large aperture
JPH09145998A (en) * 1995-11-20 1997-06-06 Nec Corp Projection lens and liquid crystal projector using the same
RU2611106C1 (en) * 2015-10-27 2017-02-21 Публичное акционерное общество "Красногорский завод им. С.А. Зверева" High-aperture lens

Families Citing this family (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS60243335A (en) * 1984-05-17 1985-12-03 Toyota Motor Corp Air-fuel ratio controlling apparatus
JPS6187944A (en) * 1984-10-05 1986-05-06 Mazda Motor Corp Control device for engine

Citations (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3517979A (en) * 1968-06-17 1970-06-30 Morgan Co Inc R A Lens system for use in the near ultraviolet light range
JPS4953419A (en) * 1972-09-22 1974-05-24

Patent Citations (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3517979A (en) * 1968-06-17 1970-06-30 Morgan Co Inc R A Lens system for use in the near ultraviolet light range
JPS4953419A (en) * 1972-09-22 1974-05-24

Cited By (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4376571A (en) * 1980-06-06 1983-03-15 Canon Kabushiki Kaisha Photographic small size objective
US4390251A (en) * 1980-09-03 1983-06-28 Canon Kabushiki Kaisha Photographic objectives of relatively large aperture
JPH09145998A (en) * 1995-11-20 1997-06-06 Nec Corp Projection lens and liquid crystal projector using the same
RU2611106C1 (en) * 2015-10-27 2017-02-21 Публичное акционерное общество "Красногорский завод им. С.А. Зверева" High-aperture lens

Also Published As

Publication number Publication date
JPS5713848B2 (en) 1982-03-19

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