JPS6461715A - Optical recording and reproducing system for optical information medium - Google Patents

Optical recording and reproducing system for optical information medium

Info

Publication number
JPS6461715A
JPS6461715A JP62217799A JP21779987A JPS6461715A JP S6461715 A JPS6461715 A JP S6461715A JP 62217799 A JP62217799 A JP 62217799A JP 21779987 A JP21779987 A JP 21779987A JP S6461715 A JPS6461715 A JP S6461715A
Authority
JP
Japan
Prior art keywords
lenses
lens
objective
collimator
optical
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.)
Granted
Application number
JP62217799A
Other languages
Japanese (ja)
Other versions
JP2511275B2 (en
Inventor
Minoru Yokota
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.)
Konica Minolta Inc
Original Assignee
Konica Minolta 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 Konica Minolta Inc filed Critical Konica Minolta Inc
Priority to JP62217799A priority Critical patent/JP2511275B2/en
Publication of JPS6461715A publication Critical patent/JPS6461715A/en
Application granted granted Critical
Publication of JP2511275B2 publication Critical patent/JP2511275B2/en
Anticipated expiration legal-status Critical
Expired - Lifetime legal-status Critical Current

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  • Lenses (AREA)
  • Optical Head (AREA)

Abstract

PURPOSE:To make excellent compensation for aberrations by composing a collimator lens of three different kinds of lenses and making the lenses meet specific requirements. CONSTITUTION:An optical system for optical disks consists of the collimator lens and an objective. Light information from a light source enters the collimator lens, passes through the 3rd positive lens, the 2nd biconvex lens, and the 1st biconvex lens in it, and then enters the objective. The three lenses constituting the collimator lenses meet the requirements shown by inequalities. The inequality I is for preventing the spherical aberration and chromatic aberration from being compensated too much or too less and realizing such an Abbe number that material supply is easy. The inequality II is for flattening an image. When the inequalities hold, proper compensation is carried out and the chromatic aberration is compensated excellently even when the system is combined with a single objective.
JP62217799A 1987-09-02 1987-09-02 Optical system for recording / reproducing optical information media Expired - Lifetime JP2511275B2 (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP62217799A JP2511275B2 (en) 1987-09-02 1987-09-02 Optical system for recording / reproducing optical information media

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP62217799A JP2511275B2 (en) 1987-09-02 1987-09-02 Optical system for recording / reproducing optical information media

Publications (2)

Publication Number Publication Date
JPS6461715A true JPS6461715A (en) 1989-03-08
JP2511275B2 JP2511275B2 (en) 1996-06-26

Family

ID=16709914

Family Applications (1)

Application Number Title Priority Date Filing Date
JP62217799A Expired - Lifetime JP2511275B2 (en) 1987-09-02 1987-09-02 Optical system for recording / reproducing optical information media

Country Status (1)

Country Link
JP (1) JP2511275B2 (en)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US6987724B2 (en) 2000-09-21 2006-01-17 Samsung Electronics Co., Ltd. Optical pickup device having chromatic aberration correction lens

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US6987724B2 (en) 2000-09-21 2006-01-17 Samsung Electronics Co., Ltd. Optical pickup device having chromatic aberration correction lens
US7391704B2 (en) 2000-09-21 2008-06-24 Samsung Electronics Co., Ltd. Optical pickup device having chromatic aberration correction lens
US8184520B2 (en) 2000-09-21 2012-05-22 Samsung Electronics Co., Ltd. Optical pickup device having chromatic aberration correction lens

Also Published As

Publication number Publication date
JP2511275B2 (en) 1996-06-26

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