JPS6419534A - Optical pickup - Google Patents
Optical pickupInfo
- Publication number
- JPS6419534A JPS6419534A JP17386087A JP17386087A JPS6419534A JP S6419534 A JPS6419534 A JP S6419534A JP 17386087 A JP17386087 A JP 17386087A JP 17386087 A JP17386087 A JP 17386087A JP S6419534 A JPS6419534 A JP S6419534A
- Authority
- JP
- Japan
- Prior art keywords
- lens
- spot
- grating
- plaid
- lightening
- 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 Recording Or Reproduction (AREA)
Abstract
PURPOSE:To reduce the number of parts and to realize miniaturization and lightening by using a plaid square inline type grating lens in a concentric shape for a diffraction grating and generating a side spot at both sides of a main spot. CONSTITUTION:The inline type grating lens 31 having an about concentric plaid square is used as the diffraction grating of an optical pickup. The specified light using efficiency relaying on a polarizing state is given to this lens 31 and side spots 13b, 13c are generated at both sides of the beam spot (main spot) 13a for reading a signal according to the diffraction efficiency distribution of a laser light thereby. The conventional beam focusing lens is made unnecessary, the number of parts is reduced and the miniaturization and lightening are realized by using the grating lens equipped with both of a side spot forming function and beam focusing function.
Priority Applications (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP17386087A JPS6419534A (en) | 1987-07-14 | 1987-07-14 | Optical pickup |
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP17386087A JPS6419534A (en) | 1987-07-14 | 1987-07-14 | Optical pickup |
Publications (1)
Publication Number | Publication Date |
---|---|
JPS6419534A true JPS6419534A (en) | 1989-01-23 |
Family
ID=15968483
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
JP17386087A Pending JPS6419534A (en) | 1987-07-14 | 1987-07-14 | Optical pickup |
Country Status (1)
Country | Link |
---|---|
JP (1) | JPS6419534A (en) |
Cited By (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
KR100887219B1 (en) * | 2004-03-31 | 2009-03-06 | 가부시키가이샤 도쿄 웰드 | Method of classifying and conveying work |
-
1987
- 1987-07-14 JP JP17386087A patent/JPS6419534A/en active Pending
Cited By (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
KR100887219B1 (en) * | 2004-03-31 | 2009-03-06 | 가부시키가이샤 도쿄 웰드 | Method of classifying and conveying work |
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