KR950015252A - Optical pickup device using Doppler effect - Google Patents

Optical pickup device using Doppler effect Download PDF

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Publication number
KR950015252A
KR950015252A KR1019930023872A KR930023872A KR950015252A KR 950015252 A KR950015252 A KR 950015252A KR 1019930023872 A KR1019930023872 A KR 1019930023872A KR 930023872 A KR930023872 A KR 930023872A KR 950015252 A KR950015252 A KR 950015252A
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KR
South Korea
Prior art keywords
beam splitter
recording medium
light
reflected
incident
Prior art date
Application number
KR1019930023872A
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Korean (ko)
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KR960006095B1 (en
Inventor
한만준
Original Assignee
배순훈
대우전자 주식회사
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Application filed by 배순훈, 대우전자 주식회사 filed Critical 배순훈
Priority to KR1019930023872A priority Critical patent/KR960006095B1/en
Publication of KR950015252A publication Critical patent/KR950015252A/en
Application granted granted Critical
Publication of KR960006095B1 publication Critical patent/KR960006095B1/en

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    • G—PHYSICS
    • G11—INFORMATION STORAGE
    • G11B—INFORMATION STORAGE BASED ON RELATIVE MOVEMENT BETWEEN RECORD CARRIER AND TRANSDUCER
    • G11B7/00—Recording or reproducing by optical means, e.g. recording using a thermal beam of optical radiation by modifying optical properties or the physical structure, reproducing using an optical beam at lower power by sensing optical properties; Record carriers therefor
    • G11B7/08—Disposition or mounting of heads or light sources relatively to record carriers
    • G11B7/09—Disposition or mounting of heads or light sources relatively to record carriers with provision for moving the light beam or focus plane for the purpose of maintaining alignment of the light beam relative to the record carrier during transducing operation, e.g. to compensate for surface irregularities of the latter or for track following

Landscapes

  • Optical Recording Or Reproduction (AREA)
  • Optical Head (AREA)

Abstract

본 발명은 도플러효과를 이용하여 기준빔과 광디스크로부터의 반사빔을 중첩시킴으로써 이때 기준빔과 반사빔의 간섭에 의한 맥놀이파를 이용해서 광디스크에 기록된 데이타를 독취할 수 있도록 되어 있으면서 그 구성도 간단하게 된 도플러효과를 이용한 광픽업장치에서의 신호처리회로를 제공하기 위한 것이다.The present invention superimposes the reflected beams from the reference beam and the optical disk by using the Doppler effect, so that the data recorded on the optical disk can be read using the beat wave caused by the interference of the reference beam and the reflected beam. The present invention provides a signal processing circuit in an optical pickup apparatus using the Doppler effect.

이를 위해 본 고안은, 빔을 발생시키는 발광부(20)와, 상기 발광부(20)와, 상기 발광부(20)로부터의 입사빔과 요철이 형성된 기록매체(10)로부터의 반사빔을 분리시키는 빔스플리터(30), 상기 빔스플리터(30)를 매개로 입사되는 상기 빔을 기록매체(10)에 투사하는 대물렌즈(40) 및, 상기 대물렌즈(40)와 빔스플리터(30)를 매개로 상기 기록매체(10)로부터의 반사광을 인가받아 포커싱상태 및 트랙킹상태를 검출함과 더불어 상기 기록매체(10)에 기록된 데이터를 독취하는 광검출부(50)를 갖춘 광픽업장치에 있어서, 상기 빔스플리터(30)의 측부에는 입사되는 빔을 반사시키는 반사수단(60:70A)이 더 설치되어 있고, 상기 빔스플리터(30)에는 상기 발광부(20)로부터 입사되는 빔을 2분할하여 상기 대물렌즈(40)와 상기 반사수단(60)으로 인가되도록 특수코팅되어 있으며, 상기 광검출부(50)가 상기 반사수단(60)으로부터의 기준빔을 인가받도록 되어 있는 것을 특징으로 한다.To this end, the present invention separates the light emitting part 20 generating the beam, the light emitting part 20, and the incident beam from the light emitting part 20 and the reflected beam from the recording medium 10 having unevenness. The beam splitter 30, the objective lens 40 for projecting the beam incident through the beam splitter 30, onto the recording medium 10, and the objective lens 40 and the beam splitter 30. The optical pickup apparatus includes a light detector (50) for detecting the focusing state and the tracking state by receiving the reflected light from the recording medium (10), and reading the data recorded on the recording medium (10). Reflecting means (60: 70A) is further provided on the side of the beam splitter (30), and the beam splitter (30) is divided into two beams incident from the light emitting part (20). Special coating is applied to the lens 40 and the reflecting means 60, The photodetector 50 is characterized in that the reference beam from the reflecting means 60 is applied.

Description

도플러효과를 이용한 광픽업장치Optical pickup device using Doppler effect

본 내용은 요부공개 건이므로 전문내용을 수록하지 않았음Since this is an open matter, no full text was included.

제2도는 본 발명에 따른 도플러효과를 이용한 광픽업장치의 제2실시예를 나타낸 도면이다.2 is a view showing a second embodiment of the optical pickup apparatus using the Doppler effect according to the present invention.

Claims (3)

빔을 발생시키는 발광부(20)와, 상기 발광부(20)로부터의 입사빔과 요철이 형성된 기록매체(10)로부터의 반사빔을 분리시키는 빔스플리터(30 : 70), 상기 빔스플리터(30 : 70)를 매개로 입사되는 상기 빔을 기록매체(10)에 투사하는 대물렌즈(40) 및, 상기 대물렌즈(40)와 빔스플리터(30 : 70)를 매개로 상기 기록매체(10)로부터의 반사광을 인가받아 포커싱상태 및 트랙킹상태를 검출함과 더불어 상기 기록매체(10)에 기록된 데이터를 독취하는 광검출부(50)를 갖춘 광픽업장치에 있어서, 상기 빔스플리터(30 : 70)의 측부에는 입사되는 빔을 반사시키는 반사수단(60:70A)이 더 설치되어 있고, 상기 빔스플리터(30 : 70)에는 상기 발광부(20)로부터 입사되는 빔을 2분할하여 상기 대물렌즈(40)와 상기 반사수단(60,70A)으로 인가되도록 특수코팅되어 있으며, 상기 광검출부(50)가 상기 반사수단(60,70A)으로 부터의 기준빔을 인가받도록 되어 있는것을 특징으로 하는 도플러효과를 이용한 광픽업장치.A beam splitter 30 for generating a beam, a beam splitter 30 for separating the incident beam from the light emitter 20 and a reflected beam from the recording medium 10 having irregularities, and the beam splitter 30 An objective lens 40 for projecting the beam incident on the recording medium 10 to the recording medium 10 and from the recording medium 10 via the objective lens 40 and the beam splitter 30. In the optical pickup apparatus having a light detector 50 for detecting the focusing state and the tracking state by reading the reflected light of the light and reading the data recorded on the recording medium 10, the beam splitter 30:70 Reflecting means (60: 70A) for reflecting the incident beam is further provided on the side portion, the beam splitter (30: 70) is divided into two beams incident from the light emitting portion 20 by the objective lens 40 And a special coating to be applied to the reflecting means (60, 70A), the light detecting unit (50) The optical pickup device using the Doppler effect, characterized in that it is applied to receive the reference beam reflected from the group of means (60,70A). 제1항에 있어서, 상기 반사수단은 상기 빔스플리터(30)의 측부에 소정 간격을 두고서 설치된 오목거울(60)인 것을 특징으로 하는 도플러효과를 이용한 광픽업장치.2. The optical pickup apparatus according to claim 1, wherein the reflecting means is a concave mirror (60) provided at a side of the beam splitter (30) at a predetermined interval. 제1항에 있어서, 상기 빔스플리터(70)의 측면이 볼록하게 형성되어 있고, 상기 반사수단은 볼록한 빔스플리터(70)의 측면에 형성된 거울코팅막(70A)인 것을 특징으로 하는 도플러효과를 이용한 광픽업장치.The light using the Doppler effect according to claim 1, wherein the side of the beam splitter 70 is convex, and the reflecting means is a mirror coating film 70A formed on the side of the convex beam splitter 70. Pickup device. ※ 참고사항 : 최초출원 내용에 의하여 공개하는 것임.※ Note: The disclosure is based on the initial application.
KR1019930023872A 1993-11-11 1993-11-11 Optical pick-up apparatus using doppler effect KR960006095B1 (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
KR1019930023872A KR960006095B1 (en) 1993-11-11 1993-11-11 Optical pick-up apparatus using doppler effect

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
KR1019930023872A KR960006095B1 (en) 1993-11-11 1993-11-11 Optical pick-up apparatus using doppler effect

Publications (2)

Publication Number Publication Date
KR950015252A true KR950015252A (en) 1995-06-16
KR960006095B1 KR960006095B1 (en) 1996-05-08

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Application Number Title Priority Date Filing Date
KR1019930023872A KR960006095B1 (en) 1993-11-11 1993-11-11 Optical pick-up apparatus using doppler effect

Country Status (1)

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KR (1) KR960006095B1 (en)

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Publication number Publication date
KR960006095B1 (en) 1996-05-08

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