TW290669B - Pick-up head device and method of determining if beam is properly focused on optical storage media - Google Patents
Pick-up head device and method of determining if beam is properly focused on optical storage mediaInfo
- Publication number
- TW290669B TW290669B TW84108770A TW84108770A TW290669B TW 290669 B TW290669 B TW 290669B TW 84108770 A TW84108770 A TW 84108770A TW 84108770 A TW84108770 A TW 84108770A TW 290669 B TW290669 B TW 290669B
- Authority
- TW
- Taiwan
- Prior art keywords
- storage media
- pick
- head device
- region
- determining
- Prior art date
Links
Landscapes
- Optical Head (AREA)
Abstract
A pick-up head device, which is applicable to process information stored on one reflective storage media, comprises of: (1) laser for lighting storage media, and the beam from the laser could reflect from the media; (2) one holographic element configured to contact reflected beam, the holographic element includes two regions used to diffract the reflective beam by two different directions. The region has one space relationship on the holographic element, i.e. on pre-selection condition, the region could receive reflective beam with equal quantity; (3) one light detector configured to receive the refractive beam, and used to determined beam quantity projected on each region.
Priority Applications (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
TW84108770A TW290669B (en) | 1995-08-22 | 1995-08-22 | Pick-up head device and method of determining if beam is properly focused on optical storage media |
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
TW84108770A TW290669B (en) | 1995-08-22 | 1995-08-22 | Pick-up head device and method of determining if beam is properly focused on optical storage media |
Publications (1)
Publication Number | Publication Date |
---|---|
TW290669B true TW290669B (en) | 1996-11-11 |
Family
ID=51398268
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
TW84108770A TW290669B (en) | 1995-08-22 | 1995-08-22 | Pick-up head device and method of determining if beam is properly focused on optical storage media |
Country Status (1)
Country | Link |
---|---|
TW (1) | TW290669B (en) |
-
1995
- 1995-08-22 TW TW84108770A patent/TW290669B/en not_active IP Right Cessation
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Legal Events
Date | Code | Title | Description |
---|---|---|---|
MM4A | Annulment or lapse of patent due to non-payment of fees |