KR950006735A - Optical axis adjusting method and device of optical pickup device - Google Patents

Optical axis adjusting method and device of optical pickup device Download PDF

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Publication number
KR950006735A
KR950006735A KR1019930016060A KR930016060A KR950006735A KR 950006735 A KR950006735 A KR 950006735A KR 1019930016060 A KR1019930016060 A KR 1019930016060A KR 930016060 A KR930016060 A KR 930016060A KR 950006735 A KR950006735 A KR 950006735A
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KR
South Korea
Prior art keywords
objective lens
deviation
amount
optical
adjusting
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KR1019930016060A
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Korean (ko)
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KR950013700B1 (en
Inventor
박수한
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김광호
삼성전자 주식회사
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Priority to KR1019930016060A priority Critical patent/KR950013700B1/en
Publication of KR950006735A publication Critical patent/KR950006735A/en
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Publication of KR950013700B1 publication Critical patent/KR950013700B1/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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  • Moving Of The Head For Recording And Reproducing By Optical Means (AREA)

Abstract

광픽업장치의 광출력장치에서 출사되어 대물렌즈를 통하여 집속되는 레이저빔의 기울기 및 쉬프트를 보정하는 방법 및 장치가 개시된다.A method and apparatus for correcting a tilt and a shift of a laser beam emitted from an optical output device of an optical pickup apparatus and focused through an objective lens are disclosed.

본 발명에 따른 광축조정방법은 대물렌즈를 통하여 집속된 레이저빔의 중심점과 대물렌즈의 중심축과의 편이량을 제1과 제2의 거리에서 측정하고, 제1편이량과 제2편이량과의 차값으로 기울기편차를 얻는 과정; 기울기편차가 감소되도록 광출력장치의 출사각을 조정하는 과정; 대물렌즈를 통하여 집속된 레이저빔의 중심점과 대물렌즈의 중심축과의 편이량을 대물렌즈의 초점거리를 중심으로 초점거리보다 적은 변위로 이격된 제1과 제2의 위치에서 측정하고, 제1편이량과 제2편이량과의 차값으로서 쉬프트편차를 검출하는 과정; 및 쉬프트편차가 감소되도록 광출력장치의 광축을 쉬프트하는 과정을 포함한다.The optical axis adjustment method according to the present invention measures the deviation amount between the center point of the laser beam focused through the objective lens and the center axis of the objective lens at the first and second distances, and the first and second deviation amounts and Obtaining a slope deviation from the difference value of; Adjusting the exit angle of the optical output device to reduce the tilt deviation; The amount of deviation between the center point of the laser beam focused through the objective lens and the center axis of the objective lens is measured at first and second positions spaced apart by less than the focal length from the focal length of the objective lens. Detecting a shift deviation as a difference value between the deviation amount and the second deviation amount; And shifting the optical axis of the optical output device to reduce the shift deviation.

본 발명에 따른 광축조정방법에서는 대물렌즈 및 액튜에이터를 미리 조립하여두고 광축조정을 실시하여 대물렌즈, 액튜에이터 및 캐리지와의 조립오차를 조정에 의해 흡수시킴으로써 광픽업장치의 조립성이 향상되는 효과를 갖는다.In the optical axis adjusting method according to the present invention, the objective lens and the actuator are assembled in advance, and the optical axis adjustment is performed to absorb the assembly error with the objective lens, the actuator and the carriage by adjusting the assembly performance of the optical pickup device. .

Description

광픽업장치의 광축조정방법 및 장치Optical axis adjusting method and device of optical pickup device

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

제3도는 본 발명의 바림직한 실시예에 따른 광축조정장치를 보이는 도면이다,3 is a view showing an optical axis adjusting device according to a preferred embodiment of the present invention,

제4도는 대물렌즈를 통한 광축의 궤적을 도시한 도면이다,4 is a view showing the trajectory of the optical axis through the objective lens,

제5도는 제3도에 도시된 장치에 의한 광축쉬프트정시 쉬프트량에 따른 차동신호의 예를 파형도이다.FIG. 5 is a waveform diagram showing an example of a differential signal according to the amount of shift in the optical axis shift timing by the apparatus shown in FIG.

Claims (2)

광출력장치와 대물렌즈와의 거리가 가변될 수 있는 광픽업장치의 조정방법에 있어서, 상기 대물렌즈를 통하여 집속된 레이저빔의 중심점과 상기 대물렌즈의 중심축과의 편이량을 제1과 제2의 거리에서 측정하고, 상기 제1편이량과 제2편이량과의 차값으로 기울기편차를 얻는 과정; 상기 기울기편차가 감소되도록 광출력장치의 출사각을 조정하는 과정; 상기 대물렌즈를 통하여 집속된 레이저빔의 중심점과 상기 대물렌즈의 중심축과의 편이량을 상기 대물렌즈의 초점거리를 중심으로 초점거리보다 적은 변위로 이격된 제1과 제2의 위치에서 측정하고, 상기 제1편이량과 제2편이량과의 차값으로서 쉬프트편차를 검출하는 과정; 및 상기 쉬프트편차가 감소되도록 상기 과출력장치의 광축을 쉬프트하는 과정을 포함하는 광픽업장치의 광축조정방법.A method of adjusting an optical pickup device in which a distance between an optical output device and an objective lens can be varied, wherein the deviation amount between the center point of the laser beam focused through the objective lens and the central axis of the objective lens is determined by the first and the second methods. Measuring at a distance of 2 and obtaining a slope deviation based on a difference value between the first deviation amount and the second deviation amount; Adjusting an exit angle of the optical output device to reduce the tilt deviation; The amount of deviation between the center point of the laser beam focused through the objective lens and the center axis of the objective lens is measured at first and second positions spaced apart by less than the focal length from the focal length of the objective lens. Detecting a shift deviation as a difference value between the first deviation amount and the second deviation amount; And shifting the optical axis of the overpower device so that the shift deviation is reduced. 광출력장치와 대물렌즈와의 거리가 가변될 수 있는 광픽업장치의 조정장치에 있어서, 상기 광출력장치와 상기 대물렌즈를 연결하는 일직선상에서 상기 대물렌즈의 이동을 허용하는 가이드레일; 고정된 위치를 가지며, 상기 대물렌즈를 통하여 집속된 레이저빔을 수광하여 상기 레이저빔의 중심점과 상기 대물렌즈의 중심축과의 편이량을 검출하는 광검출기; 및 상기 가이드레일상에서 상기 대물렌즈를 이격된 위치로 이동시킬 때 상기 광검출기에서 검출되는 편이량의 변화가 감소되도록 상기 광출력장치의 출사각을 조정하는 제1조정장치; 상기 대물렌즈의 중심축상에서 상기 대물렌즈의 미동을 허용하는 액튜에이터; 및 상기 대물렌즈가 초점거리를 중심으로 동일한 변위로 이격된 두 위치에서 상기 광검출기에서 검출된 편이량 사이의 편차가 감소되도록 상기 광출력장치의 광축을 쉬프트하는 제2조정장치를 포함하는 광축조정장치.An apparatus for adjusting an optical pickup device in which a distance between an optical output device and an objective lens is variable, the apparatus comprising: a guide rail allowing movement of the objective lens in a straight line connecting the optical output device and the objective lens; A photodetector having a fixed position and receiving a laser beam focused through the objective lens to detect an amount of deviation between a center point of the laser beam and a central axis of the objective lens; And a first adjusting device for adjusting an exit angle of the optical output device to reduce a change in the amount of deviation detected by the photodetector when the objective lens is moved to a spaced position on the guide rail. An actuator for allowing fine movement of the objective lens on the central axis of the objective lens; And a second adjusting device for shifting the optical axis of the optical output device such that the deviation between the amount of deviation detected by the photodetector is reduced at two positions in which the objective lens is spaced at the same displacement about the focal length. Device. ※ 참고사항 : 최초출원 내용에 의하여 공개하는 것임.※ Note: The disclosure is based on the initial application.
KR1019930016060A 1993-08-13 1993-08-13 Optical axis control method & control apparatus KR950013700B1 (en)

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Application Number Priority Date Filing Date Title
KR1019930016060A KR950013700B1 (en) 1993-08-13 1993-08-13 Optical axis control method & control apparatus

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KR950013700B1 KR950013700B1 (en) 1995-11-13

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Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
KR20010089918A (en) * 2000-03-13 2001-10-17 홍순주 Method of making water-soluble-polymer-modified asphalt emulsion that can be solidified by heating and paving method of using the emulsion
KR20160087125A (en) 2015-01-13 2016-07-21 김종문 The manufacture method of the heat recycled asphalt mixture used recycled oil

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
KR20010089918A (en) * 2000-03-13 2001-10-17 홍순주 Method of making water-soluble-polymer-modified asphalt emulsion that can be solidified by heating and paving method of using the emulsion
KR20160087125A (en) 2015-01-13 2016-07-21 김종문 The manufacture method of the heat recycled asphalt mixture used recycled oil

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Publication number Publication date
KR950013700B1 (en) 1995-11-13

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