JPS57201210A - Condenser lens - Google Patents
Condenser lensInfo
- Publication number
- JPS57201210A JPS57201210A JP56086290A JP8629081A JPS57201210A JP S57201210 A JPS57201210 A JP S57201210A JP 56086290 A JP56086290 A JP 56086290A JP 8629081 A JP8629081 A JP 8629081A JP S57201210 A JPS57201210 A JP S57201210A
- Authority
- JP
- Japan
- Prior art keywords
- objective lens
- lens
- shaked
- reproducing device
- axially symmetric
- 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
Classifications
-
- G—PHYSICS
- G02—OPTICS
- G02B—OPTICAL ELEMENTS, SYSTEMS OR APPARATUS
- G02B13/00—Optical objectives specially designed for the purposes specified below
- G02B13/18—Optical objectives specially designed for the purposes specified below with lenses having one or more non-spherical faces, e.g. for reducing geometrical aberration
-
- G—PHYSICS
- G02—OPTICS
- G02B—OPTICAL ELEMENTS, SYSTEMS OR APPARATUS
- G02B13/00—Optical objectives specially designed for the purposes specified below
- G02B13/24—Optical objectives specially designed for the purposes specified below for reproducing or copying at short object distances
Landscapes
- Physics & Mathematics (AREA)
- General Physics & Mathematics (AREA)
- Optics & Photonics (AREA)
- Lenses (AREA)
- Optical Head (AREA)
Abstract
PURPOSE:To obtain an objective lens suitable for an optical reproducing device where the objective lens itself is shaked to perform tracking, by satisfying prescribed conditions in respect to a biconvex single lens consisting of the first and the second axially symmetric general aspherical surfaces. CONSTITUTION:A biconvex single lens is constituted which consists of the first and the second axially symmetric general aspherical surfaces expressed with formula (1) in the system of orthogonal coordinates of (x), (y), and (z) axes where the optical axis is the (z) axis and apexes of the first and the second surfaces, to which a parallel light is made incident, are the origin, and conditions of formulas (2) and (3) are satisfied. Thus, since the lens is small-sized and lightweight and the aberration near the optical axis is corrected well, an objective lens is obtained which is suitable for an optical reproducing device where the objective lens itself is shaked to perform tracking.
Priority Applications (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP56086290A JPS57201210A (en) | 1981-06-04 | 1981-06-04 | Condenser lens |
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP56086290A JPS57201210A (en) | 1981-06-04 | 1981-06-04 | Condenser lens |
Publications (1)
Publication Number | Publication Date |
---|---|
JPS57201210A true JPS57201210A (en) | 1982-12-09 |
Family
ID=13882699
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
JP56086290A Pending JPS57201210A (en) | 1981-06-04 | 1981-06-04 | Condenser lens |
Country Status (1)
Country | Link |
---|---|
JP (1) | JPS57201210A (en) |
Cited By (14)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JPS60126616A (en) * | 1983-12-07 | 1985-07-06 | エヌ・ベ−・フイリツプス・フル−イランペンフアブリケン | Single lens and optical reader and/or writing unit |
JPS60140308A (en) * | 1983-12-28 | 1985-07-25 | Canon Inc | Refractive index distribution type single lens |
JPS6156314A (en) * | 1984-08-28 | 1986-03-22 | Konishiroku Photo Ind Co Ltd | Recording and reproducing objective lens of optical information recording medium |
JPS61118708A (en) * | 1984-11-14 | 1986-06-06 | Sankyo Seiki Mfg Co Ltd | Lens for optical disk |
JPS61252518A (en) * | 1985-05-02 | 1986-11-10 | Mitsubishi Electric Corp | Single element condensing lens |
JPS62194212A (en) * | 1986-02-20 | 1987-08-26 | Pioneer Electronic Corp | Objective for optical information reader |
EP0252614A2 (en) * | 1986-07-02 | 1988-01-13 | Matsushita Electric Industrial Co., Ltd. | Single aspherical lens |
JPS6425113A (en) * | 1987-07-21 | 1989-01-27 | Mark Kk | Finite system large aperture single lens |
JPH01220145A (en) * | 1988-02-29 | 1989-09-01 | Fujitsu Ltd | Optical pick-up |
JPH0239010A (en) * | 1988-07-28 | 1990-02-08 | Canon Inc | Aspherical single lens |
JPH02236513A (en) * | 1989-03-10 | 1990-09-19 | Hoya Corp | Glass mold aspherical single lens |
JPH02271311A (en) * | 1989-04-12 | 1990-11-06 | Canon Inc | Both-sided aspherical single lens for optical information recording and reproducing device |
US5015078A (en) * | 1988-12-01 | 1991-05-14 | Canon Kabushiki Kaisha | Aspherical single lens |
JPH0429048B2 (en) * | 1989-05-01 | 1992-05-15 | Sankyo Seiki Seisakusho Kk |
-
1981
- 1981-06-04 JP JP56086290A patent/JPS57201210A/en active Pending
Cited By (17)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JPS60126616A (en) * | 1983-12-07 | 1985-07-06 | エヌ・ベ−・フイリツプス・フル−イランペンフアブリケン | Single lens and optical reader and/or writing unit |
JPS60140308A (en) * | 1983-12-28 | 1985-07-25 | Canon Inc | Refractive index distribution type single lens |
JPH0428282B2 (en) * | 1984-08-28 | 1992-05-14 | Konishiroku Photo Ind | |
JPS6156314A (en) * | 1984-08-28 | 1986-03-22 | Konishiroku Photo Ind Co Ltd | Recording and reproducing objective lens of optical information recording medium |
JPS61118708A (en) * | 1984-11-14 | 1986-06-06 | Sankyo Seiki Mfg Co Ltd | Lens for optical disk |
JPS6331766B2 (en) * | 1984-11-14 | 1988-06-27 | Sankyo Seiki Seisakusho Kk | |
JPS61252518A (en) * | 1985-05-02 | 1986-11-10 | Mitsubishi Electric Corp | Single element condensing lens |
JPS62194212A (en) * | 1986-02-20 | 1987-08-26 | Pioneer Electronic Corp | Objective for optical information reader |
EP0252614A2 (en) * | 1986-07-02 | 1988-01-13 | Matsushita Electric Industrial Co., Ltd. | Single aspherical lens |
US4842388A (en) * | 1986-07-02 | 1989-06-27 | Matsushita Electric Industrial Co., Ltd. | Single optical lense with diffraction limit converging capability and wide field angle |
JPS6425113A (en) * | 1987-07-21 | 1989-01-27 | Mark Kk | Finite system large aperture single lens |
JPH01220145A (en) * | 1988-02-29 | 1989-09-01 | Fujitsu Ltd | Optical pick-up |
JPH0239010A (en) * | 1988-07-28 | 1990-02-08 | Canon Inc | Aspherical single lens |
US5015078A (en) * | 1988-12-01 | 1991-05-14 | Canon Kabushiki Kaisha | Aspherical single lens |
JPH02236513A (en) * | 1989-03-10 | 1990-09-19 | Hoya Corp | Glass mold aspherical single lens |
JPH02271311A (en) * | 1989-04-12 | 1990-11-06 | Canon Inc | Both-sided aspherical single lens for optical information recording and reproducing device |
JPH0429048B2 (en) * | 1989-05-01 | 1992-05-15 | Sankyo Seiki Seisakusho Kk |
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