KR970071557A - Optical pick-up device - Google Patents
Optical pick-up device Download PDFInfo
- Publication number
- KR970071557A KR970071557A KR1019960013024A KR19960013024A KR970071557A KR 970071557 A KR970071557 A KR 970071557A KR 1019960013024 A KR1019960013024 A KR 1019960013024A KR 19960013024 A KR19960013024 A KR 19960013024A KR 970071557 A KR970071557 A KR 970071557A
- Authority
- KR
- South Korea
- Prior art keywords
- disk
- optical
- hologram element
- laser beam
- transmission region
- Prior art date
Links
Landscapes
- Optical Recording Or Reproduction (AREA)
Abstract
본 발명은 광학 데이타기록 매체에 신호를 기록하고, 그 기록된 정보를 전기신호로 재생시키는 광 픽-업 장치에 관한 것으로서, 특히 일반적 음악 재생용 디지탈 오디오 디스크(DAD)와 영상재생용 디지탈 비디오 디스크(DVD)를 동시에 재생할 수 있도록 하는 광 픽-업 장치에 관한 것이다.BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates generally to an optical pick-up apparatus for recording a signal on an optical data recording medium and for reproducing the recorded information as an electric signal, (DVD) can be played back at the same time.
이를 위하여 홀로그램소자에서 발생된 레이저빔이 대물렌즈에서 집속되어 디스크상에 빔 포커스를 형성하고, 되돌아오는 광정보를 홀로그램소자의 광검출기에서 읽어들이는 광 픽-업장치에 있어서, 상기 홀로그램소자와 대물렌즈 사이에는 프리즘으로 형성되어 입사빔을 전량 투과하는 전 투과영역과, 상기 전 투과영역의 중앙부에 소정의 크기로 형성되어 레이저빔을 일정한 비율로 반사 및 투과하는 반 투과영역으로 이루어져 디스크상에 크기가 서로 다른 두종류의 빔포커스가 동시에 형성되도록 하는 빔 조절판을 설치하여 디지탈 오디오 디스크와 디지탈 비디오 디스크의 정보를 동시에 읽어들일 수 있도록 한 것이다.In order to achieve the above object, there is provided an optical pick-up apparatus for focusing a laser beam generated from a hologram element on an objective lens to form a beam focus on the disk and reading the returned optical information from the optical detector of the hologram element, A front transmission region formed as a prism between the objective lenses to transmit the entire amount of the incident beam, and a semi-transmission region formed in a central portion of the front transmission region and reflecting and transmitting the laser beam at a constant ratio, A beam control plate for simultaneously forming two kinds of beam focuses having different sizes is provided so that information of a digital audio disk and a digital video disk can be simultaneously read.
Description
본 내용은 요부공개 건이므로 전문내용을 수록하지 않았음Since this is a trivial issue, I did not include the contents of the text.
제2도는 본 발명에 따른 광 픽-업장치의 구성도.FIG. 2 is a configuration diagram of an optical pick-up apparatus according to the present invention; FIG.
Claims (1)
Priority Applications (5)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| KR1019960013024A KR970071557A (en) | 1996-04-26 | 1996-04-26 | Optical pick-up device |
| US08/847,474 US5917800A (en) | 1996-04-26 | 1997-04-25 | Optical pickup device for reproducing discs of two types with different densities by double beam focuses of different sizes |
| JP9109387A JPH1055565A (en) | 1996-04-26 | 1997-04-25 | Optical pickup device |
| GB9708508A GB2312549A (en) | 1996-04-26 | 1997-04-25 | Optical pickup device |
| CN97113094A CN1167314A (en) | 1996-04-26 | 1997-04-26 | Optical head |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| KR1019960013024A KR970071557A (en) | 1996-04-26 | 1996-04-26 | Optical pick-up device |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| KR970071557A true KR970071557A (en) | 1997-11-07 |
Family
ID=66216789
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| KR1019960013024A KR970071557A (en) | 1996-04-26 | 1996-04-26 | Optical pick-up device |
Country Status (1)
| Country | Link |
|---|---|
| KR (1) | KR970071557A (en) |
-
1996
- 1996-04-26 KR KR1019960013024A patent/KR970071557A/en not_active Application Discontinuation
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| WITN | Withdrawal due to no request for examination |