JPS5758118A - High-resolution lens - Google Patents

High-resolution lens

Info

Publication number
JPS5758118A
JPS5758118A JP13411180A JP13411180A JPS5758118A JP S5758118 A JPS5758118 A JP S5758118A JP 13411180 A JP13411180 A JP 13411180A JP 13411180 A JP13411180 A JP 13411180A JP S5758118 A JPS5758118 A JP S5758118A
Authority
JP
Japan
Prior art keywords
optical system
object side
small
constitution
sized
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
JP13411180A
Other languages
Japanese (ja)
Inventor
Kazuo Tanaka
Yukichi Niwa
Mitsutoshi Owada
Yasuo Ogino
Noboru Yukimura
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 JP13411180A priority Critical patent/JPS5758118A/en
Publication of JPS5758118A publication Critical patent/JPS5758118A/en
Pending legal-status Critical Current

Links

Classifications

    • G—PHYSICS
    • G02—OPTICS
    • G02B—OPTICAL ELEMENTS, SYSTEMS OR APPARATUS
    • G02B9/00—Optical objectives characterised both by the number of the components and their arrangements according to their sign, i.e. + or -
    • G02B9/12—Optical objectives characterised both by the number of the components and their arrangements according to their sign, i.e. + or - having three components only
    • G02B9/14—Optical objectives characterised both by the number of the components and their arrangements according to their sign, i.e. + or - having three components only arranged + - +
    • G02B9/16—Optical objectives characterised both by the number of the components and their arrangements according to their sign, i.e. + or - having three components only arranged + - + all the components being simple

Landscapes

  • Physics & Mathematics (AREA)
  • General Physics & Mathematics (AREA)
  • Optics & Photonics (AREA)
  • Lenses (AREA)

Abstract

PURPOSE:To obtain in a high-resolution optical system for a video disk with simple, small-sized and lightweight constitution, by setting prescribed values for optical elements of three lenses forming the optical system. CONSTITUTION:An optical system is composed of three lenses-a concavo-concave lens, a meniscus negative lens whose concave surface faces an object side, and a lens whose convex surface faces the object side-having surfaces numbers 1 and 2, 3 and 4, and 5 and 6 in order from the object side. Then, optical elements, such as the radius R of curvature of each surface, thickness, an air gap (d), and refractivity (n) of a medium, are determined to satisfy values in table I, so that the optical system has small spherical aberration. Therefore, the high-resolution video disk optical system having simple, small-sized and lightweight constitution is realized.
JP13411180A 1980-09-25 1980-09-25 High-resolution lens Pending JPS5758118A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP13411180A JPS5758118A (en) 1980-09-25 1980-09-25 High-resolution lens

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP13411180A JPS5758118A (en) 1980-09-25 1980-09-25 High-resolution lens

Publications (1)

Publication Number Publication Date
JPS5758118A true JPS5758118A (en) 1982-04-07

Family

ID=15120707

Family Applications (1)

Application Number Title Priority Date Filing Date
JP13411180A Pending JPS5758118A (en) 1980-09-25 1980-09-25 High-resolution lens

Country Status (1)

Country Link
JP (1) JPS5758118A (en)

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS58200205A (en) * 1982-05-18 1983-11-21 Asahi Optical Co Ltd Short-overall length object lens for optical disc
JPS62191813A (en) * 1986-02-18 1987-08-22 Matsushita Electric Ind Co Ltd Optical head and objective lens for optical disk

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS58200205A (en) * 1982-05-18 1983-11-21 Asahi Optical Co Ltd Short-overall length object lens for optical disc
JPS6233567B2 (en) * 1982-05-18 1987-07-21 Asahi Optical Co Ltd
JPS62191813A (en) * 1986-02-18 1987-08-22 Matsushita Electric Ind Co Ltd Optical head and objective lens for optical disk

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