JPS57123503A - Improving method for characteristics of tape recorder - Google Patents

Improving method for characteristics of tape recorder

Info

Publication number
JPS57123503A
JPS57123503A JP155981A JP155981A JPS57123503A JP S57123503 A JPS57123503 A JP S57123503A JP 155981 A JP155981 A JP 155981A JP 155981 A JP155981 A JP 155981A JP S57123503 A JPS57123503 A JP S57123503A
Authority
JP
Japan
Prior art keywords
black
white
tape recorder
lens
film
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
JP155981A
Other languages
Japanese (ja)
Inventor
Katsuya Ishizaki
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.)
Individual
Original Assignee
Individual
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 Individual filed Critical Individual
Priority to JP155981A priority Critical patent/JPS57123503A/en
Publication of JPS57123503A publication Critical patent/JPS57123503A/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
    • G11B7/002—Recording, reproducing or erasing systems characterised by the shape or form of the carrier
    • G11B7/003—Recording, reproducing or erasing systems characterised by the shape or form of the carrier with webs, filaments or wires, e.g. belts, spooled tapes or films of quasi-infinite extent

Abstract

PURPOSE:To obtain a small-sized inexpensive and simple reproducing device for a PCM tape by recording black-and-white squares on a black-and-white film and reading them by an array of photoelectric elements through the enlargement of a lens by projecting light from a light source. CONSTITUTION:On a black-and-white film 12, information by position marks 13 and a black-and-white squares is recorded. Light from a light source 15 passes through a running film 16 to form an enlarged image on a photoelectric element array 18 through a lens 17, and the image is read. Consequently, a small-sized, inexpensive and simple reproducing device for a PCM tape is obtained.
JP155981A 1981-01-06 1981-01-06 Improving method for characteristics of tape recorder Pending JPS57123503A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP155981A JPS57123503A (en) 1981-01-06 1981-01-06 Improving method for characteristics of tape recorder

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP155981A JPS57123503A (en) 1981-01-06 1981-01-06 Improving method for characteristics of tape recorder

Publications (1)

Publication Number Publication Date
JPS57123503A true JPS57123503A (en) 1982-08-02

Family

ID=11504876

Family Applications (1)

Application Number Title Priority Date Filing Date
JP155981A Pending JPS57123503A (en) 1981-01-06 1981-01-06 Improving method for characteristics of tape recorder

Country Status (1)

Country Link
JP (1) JPS57123503A (en)

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0130391A2 (en) * 1983-06-02 1985-01-09 Andros Research Limited A method of, and apparatus for, retrieval of information from an optical medium, and optical media
JPS6050753A (en) * 1983-08-31 1985-03-20 Canon Inc Rotary head type recorder
JPS61501115A (en) * 1983-10-12 1986-05-29 ドレクスラ−・テクノロジ−・コ−ポレ−ション 4x density optical data system

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0130391A2 (en) * 1983-06-02 1985-01-09 Andros Research Limited A method of, and apparatus for, retrieval of information from an optical medium, and optical media
JPS6050753A (en) * 1983-08-31 1985-03-20 Canon Inc Rotary head type recorder
JPS61501115A (en) * 1983-10-12 1986-05-29 ドレクスラ−・テクノロジ−・コ−ポレ−ション 4x density optical data system

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