JPS6161084B2 - - Google Patents

Info

Publication number
JPS6161084B2
JPS6161084B2 JP21890682A JP21890682A JPS6161084B2 JP S6161084 B2 JPS6161084 B2 JP S6161084B2 JP 21890682 A JP21890682 A JP 21890682A JP 21890682 A JP21890682 A JP 21890682A JP S6161084 B2 JPS6161084 B2 JP S6161084B2
Authority
JP
Japan
Prior art keywords
lens
group
focal length
light source
source side
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.)
Expired
Application number
JP21890682A
Other languages
English (en)
Japanese (ja)
Other versions
JPS59109019A (ja
Inventor
Takahiro Sugyama
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.)
Pentax Corp
Original Assignee
Asahi Kogaku Kogyo Co Ltd
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 Asahi Kogaku Kogyo Co Ltd filed Critical Asahi Kogaku Kogyo Co Ltd
Priority to JP21890682A priority Critical patent/JPS59109019A/ja
Publication of JPS59109019A publication Critical patent/JPS59109019A/ja
Publication of JPS6161084B2 publication Critical patent/JPS6161084B2/ja
Granted 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
    • G02B13/24—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)
JP21890682A 1982-12-14 1982-12-14 光デイスク用対物レンズ Granted JPS59109019A (ja)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP21890682A JPS59109019A (ja) 1982-12-14 1982-12-14 光デイスク用対物レンズ

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP21890682A JPS59109019A (ja) 1982-12-14 1982-12-14 光デイスク用対物レンズ

Publications (2)

Publication Number Publication Date
JPS59109019A JPS59109019A (ja) 1984-06-23
JPS6161084B2 true JPS6161084B2 (enrdf_load_stackoverflow) 1986-12-24

Family

ID=16727161

Family Applications (1)

Application Number Title Priority Date Filing Date
JP21890682A Granted JPS59109019A (ja) 1982-12-14 1982-12-14 光デイスク用対物レンズ

Country Status (1)

Country Link
JP (1) JPS59109019A (enrdf_load_stackoverflow)

Also Published As

Publication number Publication date
JPS59109019A (ja) 1984-06-23

Similar Documents

Publication Publication Date Title
US4610515A (en) Objective lens for an optical disc
US4416519A (en) Objective for video disks
JP2641514B2 (ja) 単群対物レンズ
US4525040A (en) Lens system for optical recording type disks
JPH05100161A (ja) 光デイスク用対物レンズ
US4029398A (en) Objective for video disks
JPH0314324B2 (enrdf_load_stackoverflow)
US4701032A (en) Graded refractive index lens system
JP2784041B2 (ja) 光ディスク用対物レンズ
JPS6136207B2 (enrdf_load_stackoverflow)
US4431275A (en) Optical recording and read-out lens system for optical recording type disks
JPS6132649B2 (enrdf_load_stackoverflow)
US4668055A (en) Lens for an optical recording/reproducing apparatus and optical recording/reproducing apparatus using same
US4046460A (en) Objective for video disks
US4240704A (en) Objective for video disks
US4447138A (en) Objective system for video disc
JPH0140325B2 (enrdf_load_stackoverflow)
JPS6161084B2 (enrdf_load_stackoverflow)
JPS6326364B2 (enrdf_load_stackoverflow)
JPH0210402B2 (enrdf_load_stackoverflow)
JPS6049287B2 (ja) ビデオデイスク用再生レンズ
JPS6233567B2 (enrdf_load_stackoverflow)
JPS6111721A (ja) コリメ−トレンズ
JP2511279B2 (ja) 光情報媒体の記録・再生用光学系
JP2511275B2 (ja) 光情報媒体の記録・再生用光学系