KR950015253A - Signal Processing Circuit in Optical Pickup Device Using Doppler Effect - Google Patents

Signal Processing Circuit in Optical Pickup Device Using Doppler Effect Download PDF

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Publication number
KR950015253A
KR950015253A KR1019930023873A KR930023873A KR950015253A KR 950015253 A KR950015253 A KR 950015253A KR 1019930023873 A KR1019930023873 A KR 1019930023873A KR 930023873 A KR930023873 A KR 930023873A KR 950015253 A KR950015253 A KR 950015253A
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South Korea
Prior art keywords
signal
unit
optical pickup
signal processing
processing circuit
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KR1019930023873A
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Korean (ko)
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KR960006096B1 (en
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한만준
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배순훈
대우전자 주식회사
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Publication of KR950015253A publication Critical patent/KR950015253A/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

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

Abstract

본 발명은 도플러효과를 이용하여 기준빔과 광디스크로부터의 반사빔을 중첩시키고 이때 기준빔과 반사빔의 간섭에 의한 맥놀이파를 검출하는 광픽업장치에서의 검출신호로부터 포커싱에러신호와 RF신호를 효과적으로 분리시키도록 된 도플러효과를 이용한 광픽업장치에서의 신호처리회로를 제공하기 위한 것이다.The present invention effectively utilizes the Doppler effect to superimpose a reflection beam from an optical disk and effectively focuses an error signal and an RF signal from a detection signal in an optical pickup device that detects beat waves due to interference between the reference beam and the reflected beam. An object of the present invention is to provide a signal processing circuit in an optical pickup apparatus using a Doppler effect to be separated.

이를 위해 본 발명은, 빔을 발생시키는 발광부(20)와, 기록매체(10)로부터의 반사빔과 상기 발광부(20)에서 주사된 기준빔을 인가받아 광검출부(50)를 갖춘 광픽업과; 상기 광검출부(50)로부터의 신호중 포커싱에러신호를 인가받아 포커싱서보를 행하는 포커싱서보부(90)및; 상가 광검출부(50)로부터의 신호중 RF신호를 인가받아 신호처리하는 RF신호처리부(100)를 구비한 광픽업장치에서의 신호처리회로에 있어서; 상기 광검출부(50)에서 인가받은 신호에서 주파수에 따라 포커싱에러신회성분과 RF신호성분을 추출하는 필터부(80)를 도 구비하여 이루어진 것을 특징으로 한다.To this end, the present invention provides an optical pickup including a light emitting unit 20 for generating a beam, a reflection beam from the recording medium 10, and a reference beam scanned by the light emitting unit 20. and; A focusing servo unit 90 which receives a focusing error signal among the signals from the photodetector unit 50 and performs a focusing servo; A signal processing circuit in an optical pickup apparatus having an RF signal processing unit (100) for receiving and processing an RF signal among signals from an additional light detecting unit (50); It is characterized in that it also comprises a filter unit 80 for extracting the focusing error response component and the RF signal component in accordance with the frequency from the signal applied from the photodetector 50.

Description

도플러효과를 이용한 광픽업장치에서의 신호처리회로Signal Processing Circuit in Optical 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 광픽업장치에서의 신호처리회로의 블럭도,2 is a block diagram of a signal processing circuit in the optical pickup apparatus using the Doppler effect according to the present invention;

제3도는 제2도에 도시된 각 부분의 출력특성을 나타낸 도면이다.3 is a diagram showing the output characteristics of each part shown in FIG.

Claims (4)

빔을 발생시키는 발광부(20)와, 기록매체(10)로부터의 반사빔과 상기 발광부(20)에서 주사된 기준빔을 인가받는 광검출부(50)를 갖춘 광픽업과; 상기 광검출부(50)로부터의 신호중 포커싱에러신호를 인가받아 포커싱서보를 행하는 포커싱서보부(90) 및, 상기 광검출부(50)로부터의 신호중 RF신호를 인가받아 신호처리하는 RF신호처리부(100)를 구비한 광픽업장치에서의 신호처리회로에 있어서, 상기 광검출부(50)에서 인가받은 신호에서 주파수에 따라 포커싱에러신호성분과 RF신호성분을 추출하는 필터부(80)를 더 구비하여이루어진 것을 특징으로 하는 도플러효과를 이용한 광픽업장치에서의 신호처리회로.An optical pickup having a light emitting unit 20 for generating a beam, a light detecting unit 50 for receiving a reflected beam from the recording medium 10 and a reference beam scanned by the light emitting unit 20; A focusing servo unit 90 which receives a focusing error signal among the signals from the photodetector 50 and performs a focusing servo, and an RF signal processing unit 100 which receives an RF signal among the signals from the photodetector 50 and processes the signal. In the signal processing circuit in the optical pickup device having a further comprising: a filter unit 80 for extracting a focusing error signal component and an RF signal component according to the frequency from the signal applied by the photodetector 50 A signal processing circuit in an optical pickup apparatus using the Doppler effect. 제1항에 있어서, 상기 필터부(80)는 상기 광검출부(50)로부터의 신호를 인가받아 소정주파수 이하의 주파수성분만을 검출하여 이 성분을 포커싱에러신호로서 상기 포커싱서보부(90)로 출력하는 제1필터(80A)와, 상기 광검출부(50)로부터의 신호를 인가받아 상기 소정주파수 이상의 주파수성분만을 검출하여 이 성분을 RF신호로서 상기 RF신호처리부(100)로 출력하는 제2필터(80B)로 이루어진 것을 특징으로 하는 도플러효과를 이용한 광픽업장치에서의 신호처리회로.The method of claim 1, wherein the filter unit 80 receives a signal from the photodetector unit 50 and detects only a frequency component below a predetermined frequency, and outputs the component to the focusing servo unit 90 as a focusing error signal. A second filter that receives a signal from the first filter 80A and the photodetector 50, detects only a frequency component equal to or greater than the predetermined frequency, and outputs the component to the RF signal processor 100 as an RF signal ( 80B), the signal processing circuit in the optical pickup device using the Doppler effect. 제2항에 있어서, 상기 기륵매체(10)가 콤팩트디스크이고 상기 소정주파수가 70kHz∼3MHz에서 선택된 것을 특징으로 하는 도플러효과를 이용하여 광픽업장치에서의 신호처리회로.3. The signal processing circuit according to claim 2, wherein said conventional medium (10) is a compact disc and said predetermined frequency is selected from 70 kHz to 3 MHz. 제2항에 있어서, 상기 기록매체(10)가 레이저디스크이고 상기 소정주파수가 140kHz∼12MHz에서 선택된 것을 특징으로 하는 도플러효과를 이용한 광픽업장치에서의 신호처리회로.3. The signal processing circuit according to claim 2, wherein the recording medium (10) is a laser disc and the predetermined frequency is selected from 140 kHz to 12 MHz. ※ 참고사항 : 최초출원 내용에 의하여 공개하는 것임.※ Note: The disclosure is based on the initial application.
KR1019930023873A 1993-11-11 1993-11-11 Signal circuit at optical pick-up using doppler effect KR960006096B1 (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
KR1019930023873A KR960006096B1 (en) 1993-11-11 1993-11-11 Signal circuit at optical pick-up using doppler effect

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
KR1019930023873A KR960006096B1 (en) 1993-11-11 1993-11-11 Signal circuit at optical pick-up using doppler effect

Publications (2)

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KR950015253A true KR950015253A (en) 1995-06-16
KR960006096B1 KR960006096B1 (en) 1996-05-08

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