JPS6484452A - Optical disk device - Google Patents

Optical disk device

Info

Publication number
JPS6484452A
JPS6484452A JP62243015A JP24301587A JPS6484452A JP S6484452 A JPS6484452 A JP S6484452A JP 62243015 A JP62243015 A JP 62243015A JP 24301587 A JP24301587 A JP 24301587A JP S6484452 A JPS6484452 A JP S6484452A
Authority
JP
Japan
Prior art keywords
beam splitter
coat
converging lens
polarized beam
half mirror
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
JP62243015A
Other languages
Japanese (ja)
Inventor
Yukio Adachi
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.)
NEC Corp
Original Assignee
NEC Corp
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 NEC Corp filed Critical NEC Corp
Priority to JP62243015A priority Critical patent/JPS6484452A/en
Publication of JPS6484452A publication Critical patent/JPS6484452A/en
Pending legal-status Critical Current

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Abstract

PURPOSE:To miniaturize an optical system by arranging a lambda/4 plate, a converging lens that the coat of a half mirror is formed on a curvature surface, and a total reflection mirror, on a polarized beam splitter. CONSTITUTION:The lambda/4 plate 6 is formed on the surface of the polarized beam splitter 4, and the converging lens 9 that the coat of the half mirror coat 16 is formed on the curvature surface is struck to it. Besides, the coat of the total reflection mirror 12 is formed on the surface of the polarized beam splitter 4 symmetrically with the plane of polarization of the plarized beam splitter 4 and besides, in the opposite side of the surface on which the converging lens 9 is arranged, so as to divide a light having passed through the polarized beam splitter 4 into two parts. By this constitution, the light having passed through the half mirror 16 on the curvature surface of the converging lens 9 is used for track detection and signal detection, and the light having been reflected by the half mirror 16 and having been divided into two parts by the total reflection mirror 12 is used for focus detection, and the optical system can be made small, and the number of parts can be reduced.
JP62243015A 1987-09-28 1987-09-28 Optical disk device Pending JPS6484452A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP62243015A JPS6484452A (en) 1987-09-28 1987-09-28 Optical disk device

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP62243015A JPS6484452A (en) 1987-09-28 1987-09-28 Optical disk device

Publications (1)

Publication Number Publication Date
JPS6484452A true JPS6484452A (en) 1989-03-29

Family

ID=17097613

Family Applications (1)

Application Number Title Priority Date Filing Date
JP62243015A Pending JPS6484452A (en) 1987-09-28 1987-09-28 Optical disk device

Country Status (1)

Country Link
JP (1) JPS6484452A (en)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB2370938B (en) * 2000-11-08 2005-06-15 Hewlett Packard Co Automatic interrupt for image forming devices

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB2370938B (en) * 2000-11-08 2005-06-15 Hewlett Packard Co Automatic interrupt for image forming devices

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