JPS57201210A - Condenser lens - Google Patents

Condenser lens

Info

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
Application number
JP56086290A
Other languages
Japanese (ja)
Inventor
Shigeo Kubota
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.)
Sony Corp
Original Assignee
Sony Corp
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 Sony Corp filed Critical Sony Corp
Priority to JP56086290A priority Critical patent/JPS57201210A/en
Publication of JPS57201210A publication Critical patent/JPS57201210A/en
Pending legal-status Critical Current

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.
JP56086290A 1981-06-04 1981-06-04 Condenser lens Pending JPS57201210A (en)

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 (13)

* Cited by examiner, † Cited by third party
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 Gradient index 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
JPS6425113A (en) * 1987-07-21 1989-01-27 Mark Kk Finite system large aperture single 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
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

Cited By (13)

* Cited by examiner, † Cited by third party
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 Gradient index 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
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

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