JPS6419316A - Condenser lens - Google Patents

Condenser lens

Info

Publication number
JPS6419316A
JPS6419316A JP17677887A JP17677887A JPS6419316A JP S6419316 A JPS6419316 A JP S6419316A JP 17677887 A JP17677887 A JP 17677887A JP 17677887 A JP17677887 A JP 17677887A JP S6419316 A JPS6419316 A JP S6419316A
Authority
JP
Japan
Prior art keywords
lenses
conjugation
farther
chromatic aberration
compensate
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
JP17677887A
Other languages
Japanese (ja)
Inventor
Hiroshi Matsui
Osamu Koyama
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.)
Canon Inc
Original Assignee
Canon 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 Canon Inc filed Critical Canon Inc
Priority to JP17677887A priority Critical patent/JPS6419316A/en
Publication of JPS6419316A publication Critical patent/JPS6419316A/en
Pending legal-status Critical Current

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  • Lenses (AREA)

Abstract

PURPOSE:To compensate a chromatic aberration and other aberrations in well balanced relation by forming at least either of 1st and 3rd surfaces aspherically and a 2nd surface spherically and satisfying specific conditions. CONSTITUTION:A condenser lens is constituted by cementing two lenses in one body. Then when the 1st positive lens and the 2nd negative lens are arranged from the side of a farther conjugation point between a couple of conjugation points and there are the 1st surface and the 2nd and 3rd surfaces forming the cemented surface from said farther conjugation point side, at least either of the 1st and 3rd surfaces is aspherical and the 2nd surface is spherical. Further, the conditions of expressions I, II, and III are satisfied to compensate various aberrations including the chromatic aberration excellently. Here, the Abbe numbers of the 1st and 2nd lenses are nudp and nudn, the focal lengths of the 1st and 2nd lenses Fp and Fn, the refractive indexes of the 1st and 2nd lenses to in-use wavelength N1 and N2, and the radius of curvature of the 2nd surface R2.
JP17677887A 1987-07-14 1987-07-14 Condenser lens Pending JPS6419316A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP17677887A JPS6419316A (en) 1987-07-14 1987-07-14 Condenser lens

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP17677887A JPS6419316A (en) 1987-07-14 1987-07-14 Condenser lens

Publications (1)

Publication Number Publication Date
JPS6419316A true JPS6419316A (en) 1989-01-23

Family

ID=16019672

Family Applications (1)

Application Number Title Priority Date Filing Date
JP17677887A Pending JPS6419316A (en) 1987-07-14 1987-07-14 Condenser lens

Country Status (1)

Country Link
JP (1) JPS6419316A (en)

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US5157553A (en) * 1991-12-20 1992-10-20 Itt Corporation Collimator for binocular viewing system
US7068445B2 (en) 2003-07-11 2006-06-27 Matsushita Electric Industrial Co., Ltd. Optical pickup lens device and information recording and reproducing device using the same

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US5157553A (en) * 1991-12-20 1992-10-20 Itt Corporation Collimator for binocular viewing system
US7068445B2 (en) 2003-07-11 2006-06-27 Matsushita Electric Industrial Co., Ltd. Optical pickup lens device and information recording and reproducing device using the same

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