KR970063065A - Dual Focus Optical Pick-Up Unit - Google Patents

Dual Focus Optical Pick-Up Unit Download PDF

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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
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KR
South Korea
Prior art keywords
optical pick
dual focus
hologram element
prism
objective lens
Prior art date
Application number
KR1019950054333A
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Korean (ko)
Inventor
김기태
Original Assignee
배순훈
대우전자 주식회사
Priority date (The priority date 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 date listed.)
Filing date
Publication date
Application filed by 배순훈, 대우전자 주식회사 filed Critical 배순훈
Priority to KR1019950054333A priority Critical patent/KR970063065A/en
Publication of KR970063065A publication Critical patent/KR970063065A/en

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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

듀얼 포커스 광 픽-업장치Dual Focus Optical Pick-Up Unit

본 내용은 요부공개 건이므로 전문내용을 수록하지 않았음As this is a public information case, the full text was not included.

Claims (1)

홀로그램소자(61)로부터 발생되는 레이저 빔을 대물렌즈(65)로서 집광하여 두께가 서로 다른 제1 및 제2디스크(58)(59)의 정보를 읽어들이는 듀얼 포커스 광 픽-업장치에 있어서, 상기 홀로그램소자(61)와 대물렌즈(65) 사이에 배치되고 일면이 비구면으로 이루어진 프리즘(63)과, 상기 프리즘(63)의 비구면에 형성되어 상기 홀로그램소자(61)로부터 조사되는 빔을 회절시키고, 돌아오는 광정보를 광검출기로 반사시키는 다수의 격자(64)로 이루어진 반사형 홀로그램격자(62)를 구비하여 된 것을 특징으로 하는 듀얼 포커스 광 픽-업장치.In a dual focus optical pick-up apparatus for condensing a laser beam generated from the hologram element 61 as the objective lens 65 to read information on the first and second disks 58 and 59 having different thicknesses. A diffraction beam disposed between the hologram element 61 and the objective lens 65 and formed on an aspherical surface of the prism 63 and an aspherical surface of the prism 63 is irradiated from the hologram element 61; And a reflective holographic grating (62) composed of a plurality of gratings (64) for reflecting the returned optical information to a photodetector. ※ 참고사항 : 최초출원 내용에 의하여 공개하는 것임.※ Note: The disclosure is based on the initial application.
KR1019950054333A 1995-12-22 1995-12-22 Dual Focus Optical Pick-Up Unit KR970063065A (en)

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)

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