KR0155097B1 - Fixed device of objective lens - Google Patents

Fixed device of objective lens Download PDF

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Publication number
KR0155097B1
KR0155097B1 KR1019950037986A KR19950037986A KR0155097B1 KR 0155097 B1 KR0155097 B1 KR 0155097B1 KR 1019950037986 A KR1019950037986 A KR 1019950037986A KR 19950037986 A KR19950037986 A KR 19950037986A KR 0155097 B1 KR0155097 B1 KR 0155097B1
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South Korea
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objective lens
fixing
present
center
fixing member
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KR1019950037986A
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Korean (ko)
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KR970023022A (en
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이근종
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배순훈
대우전자주식회사
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    • GPHYSICS
    • G01MEASURING; TESTING
    • G01MTESTING STATIC OR DYNAMIC BALANCE OF MACHINES OR STRUCTURES; TESTING OF STRUCTURES OR APPARATUS, NOT OTHERWISE PROVIDED FOR
    • G01M11/00Testing of optical apparatus; Testing structures by optical methods not otherwise provided for
    • G01M11/02Testing optical properties
    • G01M11/0207Details of measuring devices
    • G01M11/0214Details of devices holding the object to be tested
    • GPHYSICS
    • G01MEASURING; TESTING
    • G01MTESTING STATIC OR DYNAMIC BALANCE OF MACHINES OR STRUCTURES; TESTING OF STRUCTURES OR APPARATUS, NOT OTHERWISE PROVIDED FOR
    • G01M11/00Testing of optical apparatus; Testing structures by optical methods not otherwise provided for
    • G01M11/02Testing optical properties
    • G01M11/0242Testing optical properties by measuring geometrical properties or aberrations
    • GPHYSICS
    • G11INFORMATION STORAGE
    • G11BINFORMATION STORAGE BASED ON RELATIVE MOVEMENT BETWEEN RECORD CARRIER AND TRANSDUCER
    • G11B7/00Recording 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
    • G11B7/12Heads, e.g. forming of the optical beam spot or modulation of the optical beam
    • G11B7/135Means for guiding the beam from the source to the record carrier or from the record carrier to the detector
    • G11B7/1372Lenses
    • G11B7/1374Objective lenses

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  • Physics & Mathematics (AREA)
  • Chemical & Material Sciences (AREA)
  • Analytical Chemistry (AREA)
  • General Physics & Mathematics (AREA)
  • Optics & Photonics (AREA)
  • Geometry (AREA)
  • Optical Head (AREA)
  • Lens Barrels (AREA)

Abstract

본 발명은 광 픽업장치의 대물렌즈 고정구에 관한 것으로, 대물렌즈(110)가 안착되게 중앙에 형성된 결합공(120)과, 상기 대물렌즈(110)를 중앙에 고정하는 고정부재(130)와, 상기 고정부재(130)가 양측에 끼워지는 복수개의 고정홈(140)으로 이루어진 것인바, 본 발명에 의하면 대물렌즈의 수차 측정장치에 대물렌즈를 설치함에 있어서 정밀성이 향상됨과 동시에 용이하게 대물렌즈를 고정되도록 하므로써, 작업시간단축 및 작업능률이 향상되는 유용한 효과를 갖는다.The present invention relates to an objective lens fixture of the optical pickup device, the coupling hole 120 formed in the center so that the objective lens 110 is seated, the fixing member 130 for fixing the objective lens 110 in the center, The fixing member 130 is composed of a plurality of fixing grooves 140 to be fitted to both sides, according to the present invention in the installation of the objective lens in the aberration measuring apparatus of the objective lens to improve the accuracy and at the same time easily By being fixed, it has a useful effect of reducing work time and improving work efficiency.

Description

대물렌즈의 고정구Fixture of the objective lens

제1도는 종래의 대물렌즈 수차 측정장치의 작동원리를 대략적으로 도시한 구성도.1 is a configuration diagram schematically showing the operation principle of a conventional objective lens aberration measuring apparatus.

제2도는 본 고안에 따른 대물렌즈 고정구의 사시도.2 is a perspective view of the objective lens fixture according to the present invention.

제3도는 본 고안의 사용상태도이다.3 is a state diagram used in the present invention.

* 도면의 주요부분에 대한 부호의 설명* Explanation of symbols for main parts of the drawings

110 : 대물렌즈 120 : 결합공110: objective lens 120: coupling hole

130 : 고정부재 140 : 고정홈130: fixing member 140: fixing groove

본 발명은 컴팩트 디스크 플레이어용 광 픽업 액츄에이터에 관한 것으로, 보다 상세하게는 대물렌즈의 수차측정작업시 광 픽업 액츄에이터의 대물렌즈를 용이하게 고정할 수 있도록 한 대물렌즈의 고정구에 관한 것이다.BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an optical pickup actuator for a compact disc player, and more particularly, to a fixture of an objective lens for easily fixing an objective lens of an optical pickup actuator during aberration measurement operation of the objective lens.

일반적으로 광 픽업 디스크플레이어는 미니디스크플레이어(MDP), 콤팩트디스크플레이어(CDP)나 레이져디스크플레이어(LDP)와 같은 각종 광학디스크플레이어의 광기록매체인 디스크의 수직하방에 설치되어 그 디스크의 래디얼 방향으로 직선 이동하면서 디스크상에서 원하는 트랙위치를 검출하고, 검출된 트랙위치에서는 디스크면상에 기록된 피트에 레이져 광을 입사시킨 다음 그 반사광을 광학계를 통하여 검출하고 이렇게 검출된 반사광을 신호로 변환시켜서 디스크면상의 기록내용을 재생하는 장치이다.In general, an optical pickup disc player is installed below the disc, which is an optical recording medium of various optical disc players, such as a mini disc player (MDP), a compact disc player (CDP), or a laser disc player (LDP). While detecting the desired track position on the disc while moving linearly, the laser beam is incident on the pit recorded on the disc surface at the detected track position, and then the reflected light is detected through the optical system, and the detected reflected light is converted into a signal on the disc surface. Is a device for reproducing the recorded contents.

이러한 광 픽업 액츄에이터에서는 포커스 조정을 위하여 액츄에이터의 대물렌즈가 액츄에이터를 기준으로 상하방향 즉, 광축방향으로 움직임을 하고, 이것과 직교하여 대물렌즈가 액츄에이터를 기준으로 하여 좌우방향 즉, 래디얼방향으로 움직임을 함으로써 트래킹조정을 수행하고 있다.In the optical pickup actuator, the objective lens of the actuator moves in the vertical direction, that is, the optical axis direction, in order to adjust the focus, and the objective lens moves in the horizontal direction, that is, in the radial direction, perpendicular to the actuator. By doing tracking adjustment.

한편, 광 픽업 액츄에이터에서는 대물렌즈가 광축방향 및 래디얼 방향으로 미세조정을 수행할 경우에 대물렌즈의 요동을 지지해줌과 동시에 외부로부터의 충격작용시 그 진동을 감쇄시킬 수 있게 하는 서스펜션이 고정설치되어 있고, 상기 대물렌즈는 레이저광을 디스크에 입사시켜 그 반사광으로 기록을 검색하도록 광학계로 보내는 기능을 갖고 있다.On the other hand, in the optical pickup actuator, when the objective lens performs fine adjustment in the optical axis direction and the radial direction, a suspension is fixedly installed to support the fluctuation of the objective lens and to attenuate the vibration in the event of an impact from the outside. The objective lens has a function of injecting a laser beam into a disk and sending it to the optical system to retrieve the record with the reflected light.

이러한 중요한 기능을 가지고 있는 광 픽업장치의 대물렌즈는 소정의 수차(aberration : 렌즈를 투과하여 맺어지는 피사체의 상이 변형되거나 선명도가 저하되고, 콘트라스트가 나빠지며, 색이 번지는 등의 결함을 말함)를 가지게 되며, 이를 보정하기 위해서 간섭계(interferometer)를 이용하여 대물렌즈의 수차를 측정하고 있다.An objective lens of an optical pickup device having such an important function is aberration (a defect such as a deformed image of a subject formed through a lens, a deterioration of sharpness, a deterioration of contrast, color bleeding, etc.). To correct this, the aberration of the objective lens is measured by using an interferometer.

제1도는 상기한 대물렌즈의 수차 측정장치의 구성을 대략적으로 도시한 것으로, 광원으로부터 레이저광이 투과되는 투과구면렌즈(20)와, 상기 투과구면렌즈(20)의 레이저광을 받아 집속시키는 대물렌즈(30)와, 상기 대물렌즈(30)의 레이저광을 받아 피트가 구비된 콤팩트 디스크의 역할을 하는 커버글라스(40)와, 상기 커버글라스(40)에서 투광된 레이저광을 반사시키는 반사경(50)으로 이루어진 구조로 되어 있다.FIG. 1 schematically shows the configuration of the above-described aberration measuring apparatus of the objective lens. The objective lens 20 focuses on receiving the laser beam from the light source through the transmission spherical lens 20 and the objective to focus the laser beam from the transmission spherical lens 20. A lens 30, a cover glass 40 serving as a compact disk having a pit receiving the laser light of the objective lens 30, and a reflector reflecting the laser light transmitted from the cover glass 40 ( It has a structure consisting of 50).

상기한 바와같이 이루어진 대물렌즈의 수차측정장치는 광원으로부터 레이저광이 투과구면렌즈(20)를 통해 대물렌즈(30)로 투광되어 커버글라스(40)를 거쳐서 반사경(50)에서 반사되어 컴퓨터에서 입력된 데이터를 분석하므로써 상기 대물렌즈(30)의 간섭부위가 비교되어 상기 대물렌즈(30)의 수차를 분석할 수 있게 된다.In the aberration measuring apparatus of the objective lens made as described above, the laser beam is transmitted from the light source to the objective lens 30 through the transmission spherical lens 20 and reflected by the reflecting mirror 50 through the cover glass 40 to be input from the computer. By analyzing the data, the interference portions of the objective lens 30 are compared to analyze the aberration of the objective lens 30.

한편, 대물렌즈의 측정장치는 상기 대물렌즈는 수평 및 수직평행의 미세한 오차에 따라 대물렌즈의 수차가 커지므로 정밀성이 요구되어 설치작업에 어려운 점이 많았고, 또한 상기 대물렌즈는 크기가 작으므로 상기 측정장치에 설치함에 작업시간이 많이 소모되는 등의 애로점이 있다.On the other hand, in the objective lens measuring apparatus, the objective lens has a large aberration of the objective lens due to the horizontal and vertical parallel errors. There is a problem such as a lot of work time to install in the device.

본 발명은 상기한 제반 문제점을 감안하여 안출된 것으로, 본 발명의 목적은 대물렌즈의 측정장치에 상기 대물렌즈를 설치함에 있어서, 상기 대물렌즈의 수차측정장치에서 용이하게 대물렌즈를 고정할 수 있도록 한 대물렌즈의 고정구를 제공하는데 있다.SUMMARY OF THE INVENTION The present invention has been made in view of the above-mentioned problems, and an object of the present invention is to provide an objective lens in an objective lens measuring apparatus, so that the objective lens can be easily fixed in the aberration measuring apparatus of the objective lens. It is to provide a fixture of an objective lens.

상기한 목적을 달성하기 위하여 본 발명은 중앙에 대물렌즈가 안착되게 중앙에 형성된 결합공과, 상기 대물렌즈를 중앙에 고정하는 고정부재와, 상기 고정부재가 양측에 끼워지는 복수개의 고정홈으로 이루어진 대물렌즈의 고정구가 대물렌즈를 고정하여 대물렌즈의 수차 측정장치에 용이하게 설치할 수 있도록 한 것으로, 이하 첨부된 도면을 참조하여 본 발명의 구성 및 작용 효과를 설명하기로 한다.In order to achieve the above object, the present invention is composed of a coupling hole formed in the center so that the objective lens is seated in the center, a fixing member for fixing the objective lens in the center, and a plurality of fixing grooves in which the fixing member is fitted at both sides. The fixture of the lens is to fix the objective lens to be easily installed in the aberration measuring apparatus of the objective lens, with reference to the accompanying drawings will be described the configuration and effect of the present invention.

제2도는 본 발명에 따른 대물렌즈의 고정구(100)를 도시한 것으로, 상기 대물렌즈(110)가 안착되게 중앙에 형성된 결합공(120)과, 상기 대물렌즈(110)를 중앙에 고정하는 고정부재(130)와, 상기 고정부재(130)가 양측에 끼워지는 복수개의 고정홈(140)으로 이루어진 구조로 되어 있다.2 is a view illustrating a fixture 100 of an objective lens according to the present invention, and a coupling hole 120 formed at a center of the objective lens 110 to be seated therein, and a fixing fixing the objective lens 110 to a center thereof. The member 130 and the fixing member 130 has a structure consisting of a plurality of fixing grooves 140 fitted to both sides.

더욱 상세하게 설명하자면 상기 고정부재(130)는 고무재질의 밴드를 사용하여 상기 고정홈(140)에 끼워 그 자체의 신축성으로 상기 대물렌즈(110)를 고정할 수 있도록 함이 바람직할 것이다.In more detail, the fixing member 130 may be inserted into the fixing groove 140 using a rubber band so that the objective lens 110 can be fixed by its elasticity.

또한, 상기 결합공(120)과 고정홈(140)은 대물렌즈(110)의 넓이에 대응되게 소정의 크기로 형성되어 상기 대물렌즈(110)가 정확히 고정될 수 있도록 한다.In addition, the coupling hole 120 and the fixing groove 140 are formed in a predetermined size to correspond to the width of the objective lens 110 so that the objective lens 110 can be accurately fixed.

이와같이 이루어진 본 발명은 제3도에 도시한 바와같이, 먼저 대물렌즈의 수차 측정장치를 설치하는 작업자가 대물렌즈(110)를 결합공(120)의 상측에 안착시킨 다음에 고정홈(140)에 끼워져 있는 고정부재(130)가 그 신축력으로 상기 대물렌즈(110)의 외측테두리를 누르게 되어 상기 대물렌즈(110)가 용이하게 고정될 수 있게 된다.According to the present invention, as shown in FIG. 3, the operator installing the aberration measuring apparatus of the objective lens first mounts the objective lens 110 on the upper side of the coupling hole 120 and then fixes the objective lens 110 to the fixing groove 140. The fixed member 130 is inserted into the outer edge of the objective lens 110 by the elastic force can be easily fixed to the objective lens 110.

또한, 상기한 방법으로 대물렌즈(110)를 대물렌즈의 고정구(100)에 고정한 다음 대물렌즈 수차 측정장치에 설치할 경우 대물렌즈(110)가 고정된 고정구(100)를 대물렌즈(110)가 설치되는 위치(즉, 투과구면렌즈(200)에서 입사된 레이저광을 커버글라스(300) 및 반사경(400)으로 투과하는 위치)에 설치하여 대물렌즈(110)의 수차를 측정할 수 있게 된다.In addition, when the objective lens 110 is fixed to the fixture 100 of the objective lens by the method described above and then installed in the objective lens aberration measuring apparatus, the objective lens 110 is installed in the fixture 100 is fixed to the objective lens 110 The aberration of the objective lens 110 can be measured by installing at the position (that is, the position transmitting the laser light incident from the transmission spherical lens 200 to the cover glass 300 and the reflecting mirror 400).

즉, 본 발명은 중앙에 결합공이 형성되고, 양측에 고정홈이 형성되며, 상기 고정홈에 고정부재가 끼워져 이루어진 대물렌즈의 고정구가 대물렌즈를 고정함에 있어서, 상기 고정부재의 신축적인 결합력으로 대물렌즈를 상기 결합공에 안착시켜 고정하도록 한 것이다.That is, in the present invention, the coupling hole is formed in the center, and fixing grooves are formed at both sides, and the fixing tool of the objective lens formed by fitting the fixing member into the fixing groove in fixing the objective lens, the objective by the elastic coupling force of the fixing member The lens is fixed to the coupling hole.

이상에서 설명한 바와같이, 본 발명은 중앙에 결합공이 형성되고, 양측에 고정홈이 형성되며, 상기 고정홈에 고정부재가 끼워져 이루어진 대물렌즈의 고정구가 대물렌즈를 고정할 수 있도록 한 것으로, 본 발명에 의하면 대물렌즈의 수차 측정장치에 대물렌즈를 설치함에 있어서 정밀성이 향상됨과 동시에 용이하게 대물렌즈를 고정되도록 하므로써, 작업시간 단축 및 작업 능률이 향상되는 유용한 효과를 갖는다.As described above, the present invention is that the coupling hole is formed in the center, the fixing grooves are formed on both sides, the fastener of the objective lens formed by the fixing member is inserted into the fixing groove to fix the objective lens, the present invention According to the present invention, when the objective lens is installed in the aberration measuring apparatus of the objective lens, the objective lens can be easily fixed and the objective lens can be easily fixed, thereby reducing the working time and improving the work efficiency.

Claims (2)

대물렌즈(110)가 안착되게 중앙에 형성된 결합공(120)과, 상기 대물렌즈(110)를 중앙에 고정하는 고정부재(130)와, 상기 고정부재(130)가 양측에 끼워지는 복수개의 고정홈(14)으로 이루어진 것을 특징으로 하는 대물렌즈의 고정구.Coupling hole 120 formed in the center so that the objective lens 110 is seated, a fixing member 130 for fixing the objective lens 110 in the center, and a plurality of fixing the fitting member 130 is fitted on both sides Fixture of the objective lens, characterized in that consisting of a groove (14). 제1항에 있어서, 상기 고정부재(130)는 고무재질의 밴드로 이루어진 것을 특징으로 하는 대물렌즈의 고정구.The fastener of the objective lens of claim 1, wherein the fixing member (130) is made of a rubber band.
KR1019950037986A 1995-10-30 1995-10-30 Fixed device of objective lens KR0155097B1 (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
KR1019950037986A KR0155097B1 (en) 1995-10-30 1995-10-30 Fixed device of objective lens

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Application Number Priority Date Filing Date Title
KR1019950037986A KR0155097B1 (en) 1995-10-30 1995-10-30 Fixed device of objective lens

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KR970023022A KR970023022A (en) 1997-05-30
KR0155097B1 true KR0155097B1 (en) 1998-12-15

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