KR970063065A - Dual Focus Optical Pick-Up Unit - Google Patents
Dual Focus Optical Pick-Up Unit Download PDFInfo
- Publication number
- KR970063065A KR970063065A KR1019950054333A KR19950054333A KR970063065A KR 970063065 A KR970063065 A KR 970063065A KR 1019950054333 A KR1019950054333 A KR 1019950054333A KR 19950054333 A KR19950054333 A KR 19950054333A KR 970063065 A KR970063065 A KR 970063065A
- Authority
- KR
- South Korea
- Prior art keywords
- optical pick
- dual focus
- hologram element
- prism
- objective lens
- Prior art date
Links
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- Optical Head (AREA)
Abstract
본 발명은 디지탈 디스크 플레이어의 듀얼 포커스 광 픽-업 장치에 관한 것으로서, 특히 두께가 1.2㎜인 디스크와, 특히 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, in particular a dual focus of a digital disc player, which makes it possible to read information recorded on a disc having a thickness of 1.2 mm and especially a disc having a thickness of 0.6 mm. An optical pick-up device.
이를 위하여 홀로그램소자로부터 발생되는 레이저빔을 대물렌즈로서 집광하여 두께가 서로 다른 제1 및 제2디스크의 정보를 읽어들이는 듀얼 포커스 광 픽-업장치에 있어서, 상기 홀로그램소자와 대물렌즈 사이에 배치되어 일면이 비구면으로 이루어진 프리즘과, 상기 프리즘의 비구면에 형성되어 상기 홀로그램소자로부터 조사되는 빔을 회절시키고, 돌아오는 광정보를 광검출기로 반사시키는 다수의 격자로 이루어진 반사형 홀로그램격자를 구비하여 된 것이다.To this end, a dual focus optical pick-up apparatus for concentrating a laser beam generated from a hologram element as an objective lens and reading information of first and second discs having different thicknesses, wherein the laser beam is disposed between the hologram element and the objective lens. And a reflective hologram grating composed of a prism having one surface aspherical and a plurality of gratings formed on the aspherical surface of the prism to diffract the beam irradiated from the hologram element and reflect the returned optical information to the photodetector. will be.
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 |
---|---|---|---|
KR1019950054333A KR970063065A (en) | 1995-12-22 | 1995-12-22 | Dual Focus Optical Pick-Up Unit |
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
KR1019950054333A KR970063065A (en) | 1995-12-22 | 1995-12-22 | Dual Focus Optical Pick-Up Unit |
Publications (1)
Publication Number | Publication Date |
---|---|
KR970063065A true KR970063065A (en) | 1997-09-12 |
Family
ID=66617350
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
KR1019950054333A KR970063065A (en) | 1995-12-22 | 1995-12-22 | Dual Focus Optical Pick-Up Unit |
Country Status (1)
Country | Link |
---|---|
KR (1) | KR970063065A (en) |
-
1995
- 1995-12-22 KR KR1019950054333A patent/KR970063065A/en not_active Application Discontinuation
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Legal Events
Date | Code | Title | Description |
---|---|---|---|
WITN | Withdrawal due to no request for examination |