JPS6419316A - Condenser lens - Google Patents
Condenser lensInfo
- 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
Links
Landscapes
- 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.
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)
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 |
-
1987
- 1987-07-14 JP JP17677887A patent/JPS6419316A/en active Pending
Cited By (2)
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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