JPS5237404A - Optical recorder/player - Google Patents

Optical recorder/player

Info

Publication number
JPS5237404A
JPS5237404A JP50114120A JP11412075A JPS5237404A JP S5237404 A JPS5237404 A JP S5237404A JP 50114120 A JP50114120 A JP 50114120A JP 11412075 A JP11412075 A JP 11412075A JP S5237404 A JPS5237404 A JP S5237404A
Authority
JP
Japan
Prior art keywords
player
optical recorder
erasing
recording
different
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
JP50114120A
Other languages
Japanese (ja)
Other versions
JPS5817978B2 (en
Inventor
Yasuhisa Fukushima
Tomio Yoshida
Akifumi Nakada
Shiro Tsuji
Hideo Okamura
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.)
Panasonic Holdings Corp
Original Assignee
Matsushita Electric Industrial 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 Matsushita Electric Industrial Co Ltd filed Critical Matsushita Electric Industrial Co Ltd
Priority to JP50114120A priority Critical patent/JPS5817978B2/en
Publication of JPS5237404A publication Critical patent/JPS5237404A/en
Publication of JPS5817978B2 publication Critical patent/JPS5817978B2/en
Expired legal-status Critical Current

Links

Abstract

PURPOSE: To surely perform recording and erasing by providing a lens switching device having two projecting lenses with different focal distances for the purpose that the size of a beam spot formed on a record material is different with the cases of recording and erasing.
COPYRIGHT: (C)1977,JPO&Japio
JP50114120A 1975-09-19 1975-09-19 Kogaku Tekikiki Rokusai Seisouchi Expired JPS5817978B2 (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP50114120A JPS5817978B2 (en) 1975-09-19 1975-09-19 Kogaku Tekikiki Rokusai Seisouchi

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP50114120A JPS5817978B2 (en) 1975-09-19 1975-09-19 Kogaku Tekikiki Rokusai Seisouchi

Publications (2)

Publication Number Publication Date
JPS5237404A true JPS5237404A (en) 1977-03-23
JPS5817978B2 JPS5817978B2 (en) 1983-04-11

Family

ID=14629628

Family Applications (1)

Application Number Title Priority Date Filing Date
JP50114120A Expired JPS5817978B2 (en) 1975-09-19 1975-09-19 Kogaku Tekikiki Rokusai Seisouchi

Country Status (1)

Country Link
JP (1) JPS5817978B2 (en)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0712122A2 (en) * 1994-11-10 1996-05-15 Olympus Optical Co., Ltd. Information recording and/or reproducing apparatus

Cited By (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0712122A2 (en) * 1994-11-10 1996-05-15 Olympus Optical Co., Ltd. Information recording and/or reproducing apparatus
EP0712122A3 (en) * 1994-11-10 1997-03-05 Olympus Optical Co Information recording and/or reproducing apparatus
EP0829864A2 (en) * 1994-11-10 1998-03-18 Olympus Optical Co., Ltd. Information recording and/or reproducing apparatus
EP0829864A3 (en) * 1994-11-10 1999-03-24 Olympus Optical Co., Ltd. Information recording and/or reproducing apparatus

Also Published As

Publication number Publication date
JPS5817978B2 (en) 1983-04-11

Similar Documents

Publication Publication Date Title
ES458637A1 (en) Optical scanning device
JPS5345506A (en) Information detecting apparatus
JPS51151150A (en) Optical record reproducing reproducer in signal
JPS52109954A (en) Optical signal reader
JPS5237404A (en) Optical recorder/player
JPS53132308A (en) Focus controller of optical reproducer
JPS5439103A (en) Medium locator for fucus servo
JPS53100203A (en) Optical reproducer
JPS5328404A (en) Optical information re producer
JPS5245907A (en) Automatic optical path adjusting device
JPS542704A (en) Optical information reproducer
JPS5374403A (en) Optical imformation recorder
JPS5331151A (en) Automatic focusing device for microscope
JPS5348704A (en) Optical signal regenerator
JPS51122344A (en) Beam control unit of optical information read-out equipment
JPS533201A (en) Forcus servo system for light beam
JPS5348504A (en) Optical recorder/reproducer
JPS5362502A (en) Optical recording-reproducing apparatus
JPS5315105A (en) Spacing detector of optical recorder/reproducer
JPS526540A (en) Optical recording and reproducing methods for signals
JPS5318A (en) Optical video disc reproduction unit
JPS52152705A (en) Optical reproducing system
JPS5250703A (en) Optical reading device for recording materials
JPS5280803A (en) Automatic focusing device
JPS5247631A (en) Recording device of laser information