JPS5596915A - Compact large aperture ratio lens - Google Patents

Compact large aperture ratio lens

Info

Publication number
JPS5596915A
JPS5596915A JP455079A JP455079A JPS5596915A JP S5596915 A JPS5596915 A JP S5596915A JP 455079 A JP455079 A JP 455079A JP 455079 A JP455079 A JP 455079A JP S5596915 A JPS5596915 A JP S5596915A
Authority
JP
Japan
Prior art keywords
lens
object side
focal length
curvature
directed
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
JP455079A
Other languages
Japanese (ja)
Other versions
JPS6363881B2 (en
Inventor
Kazuo Shirata
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.)
Konica Minolta Inc
Original Assignee
Konica Minolta Inc
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 Konica Minolta Inc filed Critical Konica Minolta Inc
Priority to JP455079A priority Critical patent/JPS5596915A/en
Publication of JPS5596915A publication Critical patent/JPS5596915A/en
Publication of JPS6363881B2 publication Critical patent/JPS6363881B2/ja
Granted legal-status Critical Current

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  • Lenses (AREA)

Abstract

PURPOSE: To obtain the compact photographic lens of a short overall length by specifically arranging lenses of 4 groups and 4 elements.
CONSTITUTION: The 1st lens composed of a positive meniscus lens whose convex face is directed to the object side, 2nd lens consisting of a biconcave lens, 3rd lens consisting of a positive lens and 4th lens consisting of a positive meniscus lens whose convex face is directed to the object side, subsequently from the object side are so arranged as to satisfy formulas 1W6 where f is let the combined focal length of the entire lens system, f1 the focal length of the 1st lens, ri the radius of curvature of the (i)th face and ni the refractive index of the (i)th lens with respect to the d line. As a result of this, the spherical aberrations as the entire system are balanced and in addition it is avoided to become extremely small radius of curvature at the time of practical focal length, thus the flare of the spherical aberrations and comatic aberrations is corrected.
COPYRIGHT: (C)1980,JPO&Japio
JP455079A 1979-01-18 1979-01-18 Compact large aperture ratio lens Granted JPS5596915A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP455079A JPS5596915A (en) 1979-01-18 1979-01-18 Compact large aperture ratio lens

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP455079A JPS5596915A (en) 1979-01-18 1979-01-18 Compact large aperture ratio lens

Publications (2)

Publication Number Publication Date
JPS5596915A true JPS5596915A (en) 1980-07-23
JPS6363881B2 JPS6363881B2 (en) 1988-12-08

Family

ID=11587151

Family Applications (1)

Application Number Title Priority Date Filing Date
JP455079A Granted JPS5596915A (en) 1979-01-18 1979-01-18 Compact large aperture ratio lens

Country Status (1)

Country Link
JP (1) JPS5596915A (en)

Cited By (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS6140616A (en) * 1984-07-31 1986-02-26 Fanuc Ltd Position control system
JPH01309014A (en) * 1988-06-07 1989-12-13 Asahi Optical Co Ltd Front stop projection lens
JPH02137812A (en) * 1988-11-18 1990-05-28 Olympus Optical Co Ltd Photographic lens
US7206143B2 (en) 2003-05-13 2007-04-17 Olympus Corporation Image-formation optical system, and imaging system incorporating the same

Cited By (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS6140616A (en) * 1984-07-31 1986-02-26 Fanuc Ltd Position control system
JPH01309014A (en) * 1988-06-07 1989-12-13 Asahi Optical Co Ltd Front stop projection lens
JPH02137812A (en) * 1988-11-18 1990-05-28 Olympus Optical Co Ltd Photographic lens
US7206143B2 (en) 2003-05-13 2007-04-17 Olympus Corporation Image-formation optical system, and imaging system incorporating the same

Also Published As

Publication number Publication date
JPS6363881B2 (en) 1988-12-08

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