JPH0467255B2 - - Google Patents
Info
- Publication number
- JPH0467255B2 JPH0467255B2 JP18100983A JP18100983A JPH0467255B2 JP H0467255 B2 JPH0467255 B2 JP H0467255B2 JP 18100983 A JP18100983 A JP 18100983A JP 18100983 A JP18100983 A JP 18100983A JP H0467255 B2 JPH0467255 B2 JP H0467255B2
- Authority
- JP
- Japan
- Prior art keywords
- frequency
- mtf
- objective lens
- signal
- band
- 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.)
- Expired
Links
- 230000003287 optical effect Effects 0.000 claims description 40
- 238000012546 transfer Methods 0.000 claims description 3
- 238000000034 method Methods 0.000 description 11
- 230000004075 alteration Effects 0.000 description 7
- 238000010586 diagram Methods 0.000 description 7
- 230000002093 peripheral effect Effects 0.000 description 6
- 239000004065 semiconductor Substances 0.000 description 5
- 230000000694 effects Effects 0.000 description 4
- 210000001747 pupil Anatomy 0.000 description 3
- 238000004904 shortening Methods 0.000 description 3
- 230000007423 decrease Effects 0.000 description 2
- 206010010071 Coma Diseases 0.000 description 1
- 230000005540 biological transmission Effects 0.000 description 1
- 238000013461 design Methods 0.000 description 1
- 238000011982 device technology Methods 0.000 description 1
- 239000010408 film Substances 0.000 description 1
- 238000001914 filtration Methods 0.000 description 1
- 230000010365 information processing Effects 0.000 description 1
- 238000000399 optical microscopy Methods 0.000 description 1
- 238000012545 processing Methods 0.000 description 1
- 239000010409 thin film Substances 0.000 description 1
Classifications
-
- G—PHYSICS
- G11—INFORMATION STORAGE
- G11B—INFORMATION STORAGE BASED ON RELATIVE MOVEMENT BETWEEN RECORD CARRIER AND TRANSDUCER
- G11B7/00—Recording or reproducing by optical means, e.g. recording using a thermal beam of optical radiation by modifying optical properties or the physical structure, reproducing using an optical beam at lower power by sensing optical properties; Record carriers therefor
- G11B7/004—Recording, reproducing or erasing methods; Read, write or erase circuits therefor
Landscapes
- Optical Recording Or Reproduction (AREA)
- Optical Head (AREA)
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP18100983A JPS6074123A (ja) | 1983-09-28 | 1983-09-28 | 光ディスク装置 |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP18100983A JPS6074123A (ja) | 1983-09-28 | 1983-09-28 | 光ディスク装置 |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPS6074123A JPS6074123A (ja) | 1985-04-26 |
| JPH0467255B2 true JPH0467255B2 (enrdf_load_stackoverflow) | 1992-10-27 |
Family
ID=16093144
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP18100983A Granted JPS6074123A (ja) | 1983-09-28 | 1983-09-28 | 光ディスク装置 |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPS6074123A (enrdf_load_stackoverflow) |
Families Citing this family (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US6046968A (en) * | 1997-07-24 | 2000-04-04 | Hewlett-Packard Company | Re-writable optical disk having reference clock information permanently formed on the disk |
| US7701836B2 (en) | 2001-11-27 | 2010-04-20 | Hewlett-Packard Development Company, L.P. | Re-writable optical disk having reference clock information permanently formed on the disk |
-
1983
- 1983-09-28 JP JP18100983A patent/JPS6074123A/ja active Granted
Also Published As
| Publication number | Publication date |
|---|---|
| JPS6074123A (ja) | 1985-04-26 |
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