JPS5231622A - Optical information reader - Google Patents

Optical information reader

Info

Publication number
JPS5231622A
JPS5231622A JP51070308A JP7030876A JPS5231622A JP S5231622 A JPS5231622 A JP S5231622A JP 51070308 A JP51070308 A JP 51070308A JP 7030876 A JP7030876 A JP 7030876A JP S5231622 A JPS5231622 A JP S5231622A
Authority
JP
Japan
Prior art keywords
optical information
information reader
light beam
minimization
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
JP51070308A
Other languages
Japanese (ja)
Other versions
JPS564970B2 (en
Inventor
Kenjiro Goto
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.)
MANSEI KOUGIYOU KK
Mansei Kogyo KK
Original Assignee
MANSEI KOUGIYOU KK
Mansei Kogyo KK
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 MANSEI KOUGIYOU KK, Mansei Kogyo KK filed Critical MANSEI KOUGIYOU KK
Priority to JP51070308A priority Critical patent/JPS5231622A/en
Publication of JPS5231622A publication Critical patent/JPS5231622A/en
Publication of JPS564970B2 publication Critical patent/JPS564970B2/ja
Granted legal-status Critical Current

Links

Landscapes

  • Automatic Focus Adjustment (AREA)
  • Optical Recording Or Reproduction (AREA)

Abstract

PURPOSE: Minimization of the optical information reader by controlling the focus according to the variations of the light beam width vertical to the junction direction of the differential photoelectric element to receive the light beam irradiated on the information disc along the optical axis of the converging lens.
COPYRIGHT: (C)1977,JPO&Japio
JP51070308A 1976-06-15 1976-06-15 Optical information reader Granted JPS5231622A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP51070308A JPS5231622A (en) 1976-06-15 1976-06-15 Optical information reader

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP51070308A JPS5231622A (en) 1976-06-15 1976-06-15 Optical information reader

Related Parent Applications (1)

Application Number Title Priority Date Filing Date
JP3356375A Division JPS51122344A (en) 1975-03-20 1975-03-20 Beam control unit of optical information read-out equipment

Publications (2)

Publication Number Publication Date
JPS5231622A true JPS5231622A (en) 1977-03-10
JPS564970B2 JPS564970B2 (en) 1981-02-02

Family

ID=13427694

Family Applications (1)

Application Number Title Priority Date Filing Date
JP51070308A Granted JPS5231622A (en) 1976-06-15 1976-06-15 Optical information reader

Country Status (1)

Country Link
JP (1) JPS5231622A (en)

Cited By (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS5444166A (en) * 1977-09-13 1979-04-07 Showa Seisakushiyo Kk Hydraulic baffer
JPS5462461A (en) * 1977-10-27 1979-05-19 Showa Seisakushiyo Kk Oil pressure shock absorber
JPS5586941A (en) * 1978-12-26 1980-07-01 Showa Mfg Co Ltd Hydraulic buffer
JPS5632153U (en) * 1979-08-20 1981-03-28
JPS5850630A (en) * 1981-09-18 1983-03-25 Katayama Yoshitaka Signal detector in optical information reader

Cited By (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS5444166A (en) * 1977-09-13 1979-04-07 Showa Seisakushiyo Kk Hydraulic baffer
JPS5541381B2 (en) * 1977-09-13 1980-10-23
JPS5462461A (en) * 1977-10-27 1979-05-19 Showa Seisakushiyo Kk Oil pressure shock absorber
JPS5720501B2 (en) * 1977-10-27 1982-04-28
JPS5586941A (en) * 1978-12-26 1980-07-01 Showa Mfg Co Ltd Hydraulic buffer
JPS5632153U (en) * 1979-08-20 1981-03-28
JPS5850630A (en) * 1981-09-18 1983-03-25 Katayama Yoshitaka Signal detector in optical information reader

Also Published As

Publication number Publication date
JPS564970B2 (en) 1981-02-02

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