JPS6448233A - Optical information reproducing device - Google Patents

Optical information reproducing device

Info

Publication number
JPS6448233A
JPS6448233A JP20427087A JP20427087A JPS6448233A JP S6448233 A JPS6448233 A JP S6448233A JP 20427087 A JP20427087 A JP 20427087A JP 20427087 A JP20427087 A JP 20427087A JP S6448233 A JPS6448233 A JP S6448233A
Authority
JP
Japan
Prior art keywords
dimensional sensor
sensor array
half mirror
information reproducing
light
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
JP20427087A
Other languages
Japanese (ja)
Inventor
Tomoyuki Hiroki
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.)
Canon Inc
Original Assignee
Canon Inc
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 Canon Inc filed Critical Canon Inc
Priority to JP20427087A priority Critical patent/JPS6448233A/en
Publication of JPS6448233A publication Critical patent/JPS6448233A/en
Pending legal-status Critical Current

Links

Landscapes

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

Abstract

PURPOSE:To detect a focus error signal and to execute a stable information reproducing by adding a half mirror and a second one-dimensional sensor array or using a two-dimensional sensor array. CONSTITUTION:A signal light beam reflected by an optical card 1 passes through an image-formation optical system 4 and after that, it is divided into the light beams of the directions of first and second one-dimensional sensor arrays 5 and 7 by a half mirror 6. The light to transmit the half mirror 6 is photodetected by the first one-dimensional sensor array arranged in an information bit arranging direction C and the information reproducing is executed for each track. The light to reflect the half mirror 6 is photodetected by the second one-dimensional sensor array 7 arranged in a track arranging direction. Thus, an added member is only the half mirror 6 and the second one-dimensional sensor array and further, since the second one-dimensional sensor array is arranged with inclining from an optical axis, it can be compactly arranged in an optical head 8 and a focus error signal can be obtained. Thus, the stable information reproducing can be always executed.
JP20427087A 1987-08-19 1987-08-19 Optical information reproducing device Pending JPS6448233A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP20427087A JPS6448233A (en) 1987-08-19 1987-08-19 Optical information reproducing device

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP20427087A JPS6448233A (en) 1987-08-19 1987-08-19 Optical information reproducing device

Publications (1)

Publication Number Publication Date
JPS6448233A true JPS6448233A (en) 1989-02-22

Family

ID=16487692

Family Applications (1)

Application Number Title Priority Date Filing Date
JP20427087A Pending JPS6448233A (en) 1987-08-19 1987-08-19 Optical information reproducing device

Country Status (1)

Country Link
JP (1) JPS6448233A (en)

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