JPS6484452A - Optical disk device - Google Patents
Optical disk deviceInfo
- 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
Links
Landscapes
- Optical Head (AREA)
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.
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)
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 |
-
1987
- 1987-09-28 JP JP62243015A patent/JPS6484452A/en active Pending
Cited By (1)
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 |
Similar Documents
Publication | Publication Date | Title |
---|---|---|
KR880006659A (en) | Optical pickup | |
KR830006706A (en) | Apparatus and method for detecting focusing conditions of objective lens | |
EP0579843A4 (en) | Phase varying device, and optical pickup apparatus using the same for magneto-optical storage | |
KR830006705A (en) | Method and apparatus for detecting confocal condition of objective lens | |
NO173033C (en) | OPTIONS FOR MEASURING CURVATION VARIATION | |
FR2646245B1 (en) | OPTICAL READING DEVICE FOR OPTICAL RECORDING MEDIUM | |
KR900018925A (en) | Wedge Prism Assembly for Optical Information Storage | |
EP0382424A3 (en) | Image pickup head for image pickup device | |
EP0395832A3 (en) | Optical head | |
KR930008762A (en) | Optical pickup | |
JPS6484452A (en) | Optical disk device | |
JPS5766537A (en) | Magnetooptic recording and reproducing device | |
KR900015070A (en) | Optical information processing system | |
JPS5771537A (en) | Optical pickup device | |
JPS6414756A (en) | Magneto-optical head | |
SU578562A1 (en) | Interferometer for checking bending elexures of quasiplanar article surfaces | |
JPS6462851A (en) | Magneto-optical recording and reproducing device | |
JPS5717916A (en) | Optical signal regenerating device | |
JPS6414739A (en) | Optical head for plural beams | |
KR960002203A (en) | Beam Orthogonal Prisms for Optical Disc Recording Devices | |
JPS6427055A (en) | Optical head device for magneto-optical disk | |
JPS57161606A (en) | Inline homogram displacement gauge | |
JPS643843A (en) | Magneto-optical recording and reproducing device | |
KR960002205A (en) | Beam Orthogonal Prisms for Optical Disc Recording Devices | |
JPS57181504A (en) | Detection of focus |