JPS54106204A - Information recording disc of transparent type - Google Patents

Information recording disc of transparent type

Info

Publication number
JPS54106204A
JPS54106204A JP1322878A JP1322878A JPS54106204A JP S54106204 A JPS54106204 A JP S54106204A JP 1322878 A JP1322878 A JP 1322878A JP 1322878 A JP1322878 A JP 1322878A JP S54106204 A JPS54106204 A JP S54106204A
Authority
JP
Japan
Prior art keywords
information
signal
signal side
disc
transparent
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
JP1322878A
Other languages
Japanese (ja)
Inventor
Setsuji Nakagawa
Shoji Omiya
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 JP1322878A priority Critical patent/JPS54106204A/en
Publication of JPS54106204A publication Critical patent/JPS54106204A/en
Pending legal-status Critical Current

Links

Classifications

    • G—PHYSICS
    • G11—INFORMATION STORAGE
    • G11B—INFORMATION STORAGE BASED ON RELATIVE MOVEMENT BETWEEN RECORD CARRIER AND TRANSDUCER
    • G11B7/00—Recording or reproducing by optical means, e.g. recording using a thermal beam of optical radiation by modifying optical properties or the physical structure, reproducing using an optical beam at lower power by sensing optical properties; Record carriers therefor

Abstract

PURPOSE:To produce a transparent type information recording disc, which resorts to no protecting film nor sheet, by jointing a plurality of disc-shaped information carriers, in which the sides recorded with the information to be recorded with a light having passed are arranged to face one another at a preset spacing, at their inner and outer circumferencial edges. CONSTITUTION:A transparent first information carrier 7, which is composed of a signal side 11 and a mirror side 13, and a transparent second information carrier 8, which is composed of a signal side 12 and a mirror 14, are arranged at a spacing t to face each other at thier signal sides such that they are hermetically jointed at their inner circumferential edges 15 and 16 and outer circumferential edges 17 and 18 thereby to form a hollow layer 19 between the signal sides 11 and 12. The aforementioned spacing t is preferred to be more than about 0.2 mm, practically, about 0.5 to 0.7 mm. The information is read out of the aforementioned recording disc by turning the disc to focus the light from its source 23 upon the signal side 11 through a lens 26 and by receiving the light having passed upon a photodiode 27. On the other hand, the information of the signal side 12 can be read out by focusing it upon the signal side 12.
JP1322878A 1978-02-07 1978-02-07 Information recording disc of transparent type Pending JPS54106204A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP1322878A JPS54106204A (en) 1978-02-07 1978-02-07 Information recording disc of transparent type

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP1322878A JPS54106204A (en) 1978-02-07 1978-02-07 Information recording disc of transparent type

Publications (1)

Publication Number Publication Date
JPS54106204A true JPS54106204A (en) 1979-08-21

Family

ID=11827314

Family Applications (1)

Application Number Title Priority Date Filing Date
JP1322878A Pending JPS54106204A (en) 1978-02-07 1978-02-07 Information recording disc of transparent type

Country Status (1)

Country Link
JP (1) JPS54106204A (en)

Cited By (16)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0024194A1 (en) * 1979-08-20 1981-02-25 Discovision Associates Optical record disc and method of making it
EP0049474A1 (en) * 1980-10-02 1982-04-14 Nissan Motor Co., Ltd. Forging die for a part with internal, tapered grooves
JPS57158047A (en) * 1981-03-24 1982-09-29 Toshiba Corp Optical information recording medium
JPS57204531U (en) * 1981-06-24 1982-12-25
JPS5814342A (en) * 1981-07-16 1983-01-27 Sharp Corp Production for optical storage element
FR2524186A1 (en) * 1982-03-23 1983-09-30 Thomson Csf PROTECTED OPTICAL DISC COMPRISING A FLEXIBLE CLOSING ELEMENT
JPS58194153A (en) * 1982-04-27 1983-11-12 トムソン−セエスエフ Protected optical disc and method of composing same
JPS59164944U (en) * 1983-04-18 1984-11-05 ホーヤ株式会社 optical information recording medium
JPS6015877A (en) * 1983-06-30 1985-01-26 インタ−ナショナル　ビジネス　マシ−ンズ　コ−ポレ−ション Optical floppy disk device
JPS6083241A (en) * 1983-10-12 1985-05-11 Nec Corp Optical recording member
JPS61107548A (en) * 1984-10-30 1986-05-26 Tdk Corp Optical recording disc
JPS61111040U (en) * 1985-10-25 1986-07-14
EP0195720A2 (en) 1985-03-20 1986-09-24 Hitachi Maxell Ltd. Ventilation arrangement for use in an optical recording disc
JPS62298949A (en) * 1986-06-18 1987-12-26 Kuraray Co Ltd Substrate for optical recording medium and method and device for manufacturing it
JPS63834A (en) * 1987-06-17 1988-01-05 Matsushita Electric Ind Co Ltd Optical recording carrier
JPH04120466U (en) * 1991-04-12 1992-10-28 株式会社シマノ spinning reel

Cited By (24)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS6236288B2 (en) * 1979-08-20 1987-08-06 Discovision Ass
JPS5661050A (en) * 1979-08-20 1981-05-26 Discovision Ass Method of producing optical recording disk
EP0024194A1 (en) * 1979-08-20 1981-02-25 Discovision Associates Optical record disc and method of making it
EP0049474A1 (en) * 1980-10-02 1982-04-14 Nissan Motor Co., Ltd. Forging die for a part with internal, tapered grooves
JPS57158047A (en) * 1981-03-24 1982-09-29 Toshiba Corp Optical information recording medium
JPH0248983B2 (en) * 1981-03-24 1990-10-26 Tokyo Shibaura Electric Co
JPS57204531U (en) * 1981-06-24 1982-12-25
JPH0240581Y2 (en) * 1981-06-24 1990-10-30
JPS5814342A (en) * 1981-07-16 1983-01-27 Sharp Corp Production for optical storage element
FR2524186A1 (en) * 1982-03-23 1983-09-30 Thomson Csf PROTECTED OPTICAL DISC COMPRISING A FLEXIBLE CLOSING ELEMENT
JPS58194153A (en) * 1982-04-27 1983-11-12 トムソン−セエスエフ Protected optical disc and method of composing same
JPH0353706B2 (en) * 1982-04-27 1991-08-15 Thomson Csf
JPS59164944U (en) * 1983-04-18 1984-11-05 ホーヤ株式会社 optical information recording medium
JPS6015877A (en) * 1983-06-30 1985-01-26 インタ−ナショナル　ビジネス　マシ−ンズ　コ−ポレ−ション Optical floppy disk device
JPH0370864B2 (en) * 1983-06-30 1991-11-11 Intaanashonaru Bijinesu Mashiinzu Corp
JPS6083241A (en) * 1983-10-12 1985-05-11 Nec Corp Optical recording member
JPS61107548A (en) * 1984-10-30 1986-05-26 Tdk Corp Optical recording disc
JPH0576707B2 (en) * 1984-10-30 1993-10-25 Tdk Electronics Co Ltd
EP0195720A2 (en) 1985-03-20 1986-09-24 Hitachi Maxell Ltd. Ventilation arrangement for use in an optical recording disc
JPS61111040U (en) * 1985-10-25 1986-07-14
JPS62298949A (en) * 1986-06-18 1987-12-26 Kuraray Co Ltd Substrate for optical recording medium and method and device for manufacturing it
JPS63834A (en) * 1987-06-17 1988-01-05 Matsushita Electric Ind Co Ltd Optical recording carrier
JPH043014B2 (en) * 1987-06-17 1992-01-21
JPH04120466U (en) * 1991-04-12 1992-10-28 株式会社シマノ spinning reel

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