KR970063063A - Dual Focus Optical Pick-Up Unit - Google Patents
Dual Focus Optical Pick-Up Unit Download PDFInfo
- Publication number
- KR970063063A KR970063063A KR1019950054331A KR19950054331A KR970063063A KR 970063063 A KR970063063 A KR 970063063A KR 1019950054331 A KR1019950054331 A KR 1019950054331A KR 19950054331 A KR19950054331 A KR 19950054331A KR 970063063 A KR970063063 A KR 970063063A
- Authority
- KR
- South Korea
- Prior art keywords
- dual
- hologram element
- focus optical
- prism
- laser beam
- Prior art date
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- Optical Head (AREA)
Abstract
본 발명은 디지탈 디스크 플레이어의 듀얼 포커스 광 픽-업장치에 관한 것으로서, 특히 두께가 1.2㎜인 디스크와, 두께가 0.6㎜인 디스크에 기록된 정보를 읽어들일 수 있도록 하는 디지탈 디스크 플레이어의 듀얼 포커스 광 픽-업장치에 관한 것이다.BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a dual focus optical pick-up device of a digital disc player, and more particularly, to a dual focus optical disc of a digital disc player, which makes it possible to read information recorded on a disk having a thickness of 1.2 mm and a disk having a thickness of 0.6 mm. It relates to a pick-up device.
이를 위하여 레이저 다이오드, 홀로그램격자, 광검출기 등이 일체로 형성된 홀로그램소자로부터 발생되는 레이저 빔을 대물렌즈로 집광하여 두께가 서로 다른 디스크의 정보를 읽어들이는 듀얼 포커스 광 픽-업장치에 있어서, 상기 홀로그램소자와 대물렌즈 사이에 소정의 기울기로 배치된 프리즘과, 상기 프리즘의 일면에 형성되어 홀로그램소자 및 대물렌즈로부터 조사되는 레이저빔을 일정한 비의 반사광과 투과광으로 분리하는 빔 스플리트면과, 상기 프리즘의 타측면에 형성되어 홀로그램소자로부터 조사되는 레이저빔을 임의의 각도로 반사시켜 듀얼 빔을 형성하는 반사면으로 이루어진 듀얼 빔 반사렌즈를 구비하여서 된 것이다.In the dual focus optical pick-up apparatus for reading information of a disk having a different thickness by collecting a laser beam generated from a hologram element formed integrally with a laser diode, a hologram grating, a photodetector, etc. A prism disposed at a predetermined inclination between the hologram element and the objective lens, a beam split surface formed on one surface of the prism to separate the laser beam irradiated from the hologram element and the objective lens into reflected light and transmitted light in a constant ratio; It is provided with a dual beam reflecting lens made of a reflecting surface formed on the other side of the prism to reflect the laser beam emitted from the hologram element at an arbitrary angle to form a dual beam.
Description
본 내용은 요부공개 건이므로 전문내용을 수록하지 않았음As this is a public information case, the full text was not included.
Claims (1)
Priority Applications (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
KR1019950054331A KR970063063A (en) | 1995-12-22 | 1995-12-22 | Dual Focus Optical Pick-Up Unit |
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
KR1019950054331A KR970063063A (en) | 1995-12-22 | 1995-12-22 | Dual Focus Optical Pick-Up Unit |
Publications (1)
Publication Number | Publication Date |
---|---|
KR970063063A true KR970063063A (en) | 1997-09-12 |
Family
ID=66617327
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
KR1019950054331A KR970063063A (en) | 1995-12-22 | 1995-12-22 | Dual Focus Optical Pick-Up Unit |
Country Status (1)
Country | Link |
---|---|
KR (1) | KR970063063A (en) |
-
1995
- 1995-12-22 KR KR1019950054331A patent/KR970063063A/en not_active Application Discontinuation
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Legal Events
Date | Code | Title | Description |
---|---|---|---|
WITN | Withdrawal due to no request for examination |