KR930022296A - Playback signal detection method of optical pickup - Google Patents

Playback signal detection method of optical pickup Download PDF

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Publication number
KR930022296A
KR930022296A KR1019920007411A KR920007411A KR930022296A KR 930022296 A KR930022296 A KR 930022296A KR 1019920007411 A KR1019920007411 A KR 1019920007411A KR 920007411 A KR920007411 A KR 920007411A KR 930022296 A KR930022296 A KR 930022296A
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KR
South Korea
Prior art keywords
optical
photodetector
recording medium
reproduction signal
optical pickup
Prior art date
Application number
KR1019920007411A
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Korean (ko)
Other versions
KR100291218B1 (en
Inventor
김영웅
유익형
이철우
Original Assignee
정용문
삼성전자 주식회사
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Application filed by 정용문, 삼성전자 주식회사 filed Critical 정용문
Priority to KR1019920007411A priority Critical patent/KR100291218B1/en
Publication of KR930022296A publication Critical patent/KR930022296A/en
Application granted granted Critical
Publication of KR100291218B1 publication Critical patent/KR100291218B1/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
    • G11B7/004—Recording, reproducing or erasing methods; Read, write or erase circuits therefor
    • G11B7/005—Reproducing

Abstract

광 또는 광자기디스크나 광테이프 등의 광기록매체에 광빔을 주사하고 그 광기록매체에서 반사하는 광빔으로부터 전기적인 신호를 검출해 내는 광픽업에 있어서, 고밀도의 기록정보를 재생하기 위한 재생신호 검출방법이 개시되어 있다. 그 방법은 재생신호 검출용 광검출기를 정보의 트랙방향으로 적어도 다분할 된 광검출기를 사용하고, 그 다분할 광검출기의 두영역으로부터 출력되는 신호를 차동증폭기로 차동케 한다. 개시된 방법에 의하여 검출되는 재생신호는 2분할 광검출기를 사용하는 경우 2배의 높은 주파수를 가진다. 이것은 2배의 기록밀도로 기록된 정보의 재생이 가능함을 의미한다. 따라서 개시된 방법에 의하여 기존 광기록매체의 기록밀도를 적어도 2배 향상시킬 수 있는 것이다.In an optical pickup for scanning an optical beam onto an optical recording medium such as an optical or magneto-optical disk or optical tape and detecting an electrical signal from the optical beam reflected from the optical recording medium, a reproduction signal for reproducing high density recording information is detected. A method is disclosed. The method uses a photodetector at least multiplied in the track direction of information for the reproduction signal detecting photodetector, and differentials the signals output from the two regions of the multiplied photodetector with a differential amplifier. The reproduced signal detected by the disclosed method has a frequency twice as high when using a two split photodetector. This means that information recorded at twice the recording density can be reproduced. Therefore, the recording density of the existing optical recording medium can be improved at least twice by the disclosed method.

Description

광픽업의 재생신호 검출방법Playback signal detection method of optical pickup

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

제2도는 본 발명을 실시예에 의해서 개선된 광픽업의 배치도.2 is a layout view of an optical pickup improved by the embodiment of the present invention.

제3도의 (a)∼(b)는 제2도의 광픽업에 의하여 검출되는 재생신호의 검출동작을 시간차적으로 설명하는 그 개선된 광픽업의 사시도들.3 (a) to 3 (b) are perspective views of the improved optical pick-up explaining the operation of detecting the reproduction signal detected by the optical pick-up of FIG.

제4도의 (a)는 본 발명의 실시예에 의하여 검출되는 재생신호의 파형을 나탄낸 그래프 제 4도의 (b)sms 종래 광픽업에 의하여 검출되는 재생신호의 파형을 비교도시한 그래프.FIG. 4A is a graph showing waveforms of a playback signal detected by an embodiment of the present invention. FIG. 4B is a graph showing comparison of waveforms of a playback signal detected by a conventional optical pickup.

Claims (1)

광기록매체의 정보가 수록되는 트랙을 따라 광빔을 주사하고 그 광기록매체로부터 반사되는 광빔을 광검출기로 검지하여 전기적인 재생신호를 출력하는 광픽업의 재생신호 검출방법에 있어서, 상기 광기록매체의 정보가 수록된 트랙의 방향으로 적어도 다분할된 광검출기를 사용하여 그 광기록매체로부터 반사되는 광빔을 검지하고, 그 다분할된 영역에서 각각 출력되는 신호를 차동증폭하여, 재생신호가 출력되게 함을 특징으로 하는 광픽업의 재생신호 검출방법.A reproduction signal detection method of an optical pickup, comprising: scanning a light beam along a track containing information of an optical recording medium, detecting a light beam reflected from the optical recording medium with a photodetector, and outputting an electrical reproduction signal; A light beam reflected from the optical recording medium is detected using a photodetector at least divided in the direction of the track containing the information, and the signals amplified separately from the divided regions are amplified so that a reproduction signal is output. A reproduction signal detection method of an optical pickup, characterized in that. ※ 참고사항 : 최초출원 내용에 의하여 공개하는 것임.※ Note: The disclosure is based on the initial application.
KR1019920007411A 1992-04-30 1992-04-30 Method of detecting playback signal of optical pickup KR100291218B1 (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
KR1019920007411A KR100291218B1 (en) 1992-04-30 1992-04-30 Method of detecting playback signal of optical pickup

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
KR1019920007411A KR100291218B1 (en) 1992-04-30 1992-04-30 Method of detecting playback signal of optical pickup

Publications (2)

Publication Number Publication Date
KR930022296A true KR930022296A (en) 1993-11-23
KR100291218B1 KR100291218B1 (en) 2001-06-01

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Application Number Title Priority Date Filing Date
KR1019920007411A KR100291218B1 (en) 1992-04-30 1992-04-30 Method of detecting playback signal of optical pickup

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Family Cites Families (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS6473533A (en) * 1987-09-16 1989-03-17 Matsushita Graphic Communic Optical disk device

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