KR100467840B1 - Laser diode setting device of optical pick-up - Google Patents
Laser diode setting device of optical pick-up Download PDFInfo
- Publication number
- KR100467840B1 KR100467840B1 KR10-2002-0028451A KR20020028451A KR100467840B1 KR 100467840 B1 KR100467840 B1 KR 100467840B1 KR 20020028451 A KR20020028451 A KR 20020028451A KR 100467840 B1 KR100467840 B1 KR 100467840B1
- Authority
- KR
- South Korea
- Prior art keywords
- laser diode
- block
- tilt adjustment
- hemisphere
- positioning block
- Prior art date
Links
Classifications
-
- 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
- G11B7/12—Heads, e.g. forming of the optical beam spot or modulation of the optical beam
- G11B7/125—Optical beam sources therefor, e.g. laser control circuitry specially adapted for optical storage devices; Modulators, e.g. means for controlling the size or intensity of optical spots or optical traces
- G11B7/127—Lasers; Multiple laser arrays
-
- 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
- G11B7/095—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 specially adapted for discs, e.g. for compensation of eccentricity or wobble
- G11B7/0956—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 specially adapted for discs, e.g. for compensation of eccentricity or wobble to compensate for tilt, skew, warp or inclination of the disc, i.e. maintain the optical axis at right angles to the disc
-
- 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
- G11B7/12—Heads, e.g. forming of the optical beam spot or modulation of the optical beam
- G11B7/13—Optical detectors therefor
-
- 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
- G11B7/12—Heads, e.g. forming of the optical beam spot or modulation of the optical beam
- G11B7/135—Means for guiding the beam from the source to the record carrier or from the record carrier to the detector
- G11B7/1372—Lenses
- G11B7/1374—Objective lenses
-
- 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
- G11B7/12—Heads, e.g. forming of the optical beam spot or modulation of the optical beam
- G11B7/135—Means for guiding the beam from the source to the record carrier or from the record carrier to the detector
- G11B7/1372—Lenses
- G11B7/1376—Collimator lenses
-
- 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
- G11B7/12—Heads, e.g. forming of the optical beam spot or modulation of the optical beam
- G11B7/135—Means for guiding the beam from the source to the record carrier or from the record carrier to the detector
- G11B7/1395—Beam splitters or combiners
-
- G—PHYSICS
- G11—INFORMATION STORAGE
- G11B—INFORMATION STORAGE BASED ON RELATIVE MOVEMENT BETWEEN RECORD CARRIER AND TRANSDUCER
- G11B2220/00—Record carriers by type
- G11B2220/20—Disc-shaped record carriers
- G11B2220/25—Disc-shaped record carriers characterised in that the disc is based on a specific recording technology
- G11B2220/2537—Optical discs
Abstract
본 발명은 광 픽업의 레이저 다이오드 조정장치에 관한 것으로, 보다 상세하게는 일면이 베이스(10)의 일측면을 따라 직선 운동되게 설치되고 반대면에는 반구(22)가 형성된 위치조정블록(20)과, 위치조정블록의 반구에 면접되도록 조립되어 반구의 형상을 따라 회전 운동가능하게 설치되는 틸트조정블록(30)과, 틸트조정블록에 결합되어 함께 회전 운동하고, 광 빔을 발광시키는 레이저 다이오드(1)를 포함하여 구성되는 바, 본 발명은 위치조정블록과 틸트조정블록을 통해 레이저 다이오드의 위치 및 각도를 자유롭게 조정하기 때문에 광축의 어긋남 및 강도분포의 틀어짐을 용이하게 개선시킬 수 있으며, 이로 인해 불량률이 최소화되고 안정된 품질 특성을 실현시키므로 제품의 성능이 향상되는 효과가 있다.The present invention relates to an apparatus for adjusting a laser diode of an optical pickup, and more particularly, one side of which is installed to move linearly along one side of the base 10 and a positioning block 20 having a hemisphere 22 formed on the opposite side thereof. Tilt adjustment block 30 is assembled to be interviewed in the hemisphere of the positioning block is installed so as to rotate in accordance with the shape of the hemisphere, and the laser diode coupled to the tilt adjustment block to rotate together and emit light beams (1 In the present invention, since the position and angle of the laser diode are freely adjusted through the positioning block and the tilt adjusting block, the deviation of the optical axis and the distortion of the intensity distribution can be easily improved. Since this minimized and stable quality characteristics are realized, the performance of the product is improved.
Description
본 발명은 광 픽업에 관한 것으로, 보다 상세하게는 레이저 다이오드의 위치 및 틸트를 용이하게 조정할 수 있도록 하여 광축 및 강도분포의 특성을 개선한 광 픽업의 레이저 다이오드 조정장치에 관한 것이다.BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an optical pickup, and more particularly, to an apparatus for adjusting a laser diode of an optical pickup in which the position and tilt of the laser diode can be easily adjusted to improve the characteristics of the optical axis and intensity distribution.
일반적으로 광 픽업은 각종 광 디스크에 수록된 신호를 재생하거나 광 디스크에 신호를 기록하는 기기로, 도 1에는 일반적인 광 픽업의 구성이 개략적으로 도시되어 있다.In general, an optical pickup is a device that reproduces signals recorded on various optical disks or records signals on optical disks. FIG. 1 schematically illustrates a configuration of a general optical pickup.
이를 참고하면, 종래의 광 픽업은 광 빔을 발생시키는 레이저 다이오드(1)와, 레이저 다이오드에서 출사된 광 빔을 분기시키는 그래이팅 렌즈(2)와, 그래이팅 렌즈를 통과하여 입사되는 광 빔을 광 디스크(6) 방향으로 반사시키는 빔 스플리터(3)와, 빔 스플리터에서 반사된 빔을 평행빔으로 변환시키는 콜리메이팅 렌즈(4)와, 콜리메이팅 렌즈에 의해 변환된 평행빔을 광 디스크(6)의 한점에 집광시켜 주는 대물렌즈(5)와, 광 디스크(6)의 신호 트랙에 부딪쳐 반사된 광 빔을 집속시켜 주는 센서렌즈(7)와, 센서렌즈에 의해 집속되는 광 빔을 검출하여 전기적 신호로 변환하는 광 검출기(8)로 구성되어 있다.Referring to this, a conventional optical pickup includes a laser diode 1 for generating a light beam, a grating lens 2 for branching the light beam emitted from the laser diode, and a light beam incident through the grating lens. A beam splitter 3 for reflecting in the direction of the optical disk 6, a collimating lens 4 for converting the beam reflected by the beam splitter into a parallel beam, and a parallel beam converted by the collimating lens for the optical disk 6 The objective lens 5 for condensing at one point, the sensor lens 7 for converging the reflected light beam by hitting the signal track of the optical disk 6, and the light beam focused by the sensor lens. It consists of the photodetector 8 which converts into an electrical signal.
이렇게 구성된 광 픽업의 빔 경로를 간략하게 설명하면, 레이저 다이오드(1)로부터 발생된 광 빔은 그래이팅 렌즈(2)를 통해 분기된 상태로 빔 스플리터(3)에서 광 디스크(6) 방향으로 반사되고, 콜리메이팅 렌즈(4)를 통해 평행빔으로 변환된다. 그리고, 변환된 평행빔은 대물렌즈(5)에 의해 광 디스크(6)의 한점에 집광된 다음, 계속해서 광 디스크(6)의 신호 트랙에 부딪쳐 반사되고, 반사된 빔은 동일한 경로로 되돌아오다가 빔 스플리터(3)를 통과하여 센서렌즈(7)를 통해 광 검출기(8)의 한점에 집속되며, 광 검출기(8)에서 전기적인 신호로 변환된다.Briefly describing the beam path of the optical pickup thus configured, the light beam generated from the laser diode 1 is reflected from the beam splitter 3 toward the optical disk 6 in a state branched through the grating lens 2. And converted into parallel beams through the collimating lens 4. Then, the converted parallel beam is collected at one point of the optical disc 6 by the objective lens 5, and then hits and is reflected by the signal track of the optical disc 6, and the reflected beam is returned to the same path. Passes through the beam splitter 3 and is focused at a point of the photodetector 8 through the sensor lens 7 and converted into an electrical signal at the photodetector 8.
이러한 광 픽업의 각종 광부품은 디스크의 반경방향을 따라 왕복 이송되도록 설치되는 베이스에 조립되는데, 이때 각종 부품공차 및 조립공차로 인해 광축이 어긋나고 강도분포가 틀어지게 되므로 광 성능이 저하되는 문제가 발생된다.Various optical parts of the optical pickup are assembled to a base installed to reciprocate along the radial direction of the disk. In this case, optical performance is deteriorated and intensity distribution is distorted due to various component tolerances and assembly tolerances. do.
따라서, 종래에는 각종 광부품을 조립후 스팩(SPEC)관리로 레이저 다이오드의 위치를 조정하여 불량을 제거하는 방식을 사용하고 있다.Therefore, in the related art, a method of removing defects by adjusting the position of a laser diode by SPEC management after assembling various optical components is used.
도 2를 참고하여 레이저 다이오드가 베이스에 조립되는 종래 방식을 설명하면, 베이스(9) 내에는 빔투과공(9a)이 형성되고, 베이스의 일면에는 빔투과공과 연통되는 결합홈(9b)이 형성되며, 레이저 다이오드(1)는 베이스의 빔투과공과 결합홈에 삽입되어 통상적인 본딩을 통해 고정된다.Referring to FIG. 2, a beam diode 9a is formed in the base 9 and a coupling groove 9b is formed in one surface of the base to communicate with the beam penetrating hole. The laser diode 1 is inserted into the beam transmission hole and the coupling groove of the base to be fixed through a conventional bonding.
이때, 베이스(9)와 레이저 다이오드(1)는 공차관리 및 작업관리를 통해 허용 스팩에 맞춰 생산된다.At this time, the base 9 and the laser diode 1 are produced according to the allowable specification through tolerance management and work management.
즉, 레이저 다이오드(1)는 베이스(9)의 빔투과공(9a)과 결합홈(9b) 내에서 허용 스팩만큼 조정되기 때문에 어긋난 광축의 오차만큼 레이저 다이오드의 위치를 조정할 수 있게 된다.That is, since the laser diode 1 is adjusted by the allowable specification in the beam penetrating hole 9a and the coupling groove 9b of the base 9, the position of the laser diode can be adjusted by the error of the misaligned optical axis.
그러나, 레이저 다이오드를 직접 움직이다 보니 정밀도가 떨어지고, 조립 오차로 인해 불량이 발생하면 폐기처리 할 수밖에 없으며, 역방향 가공에 의한 양품화로 수율 및 생산성이 저하되는 문제점이 있었다.However, when the laser diode is directly moved, the accuracy is lowered, and if a defect occurs due to an assembly error, there is no choice but to dispose of the laser diode.
또한, 스팩 관리를 통해 광축의 어긋남을 조정할 수는 있지만, 강도분포 틀어짐의 원인인 방사각의 틀어짐을 조정할 수는 없으며, 방사각의 틀어짐으로 인해 광 성능이 저하되므로 제품의 신뢰도가 떨어지는 단점이 있었다.In addition, although the misalignment of the optical axis can be adjusted through the spec management, it is not possible to adjust the misalignment of the radiation angle which causes the intensity distribution to be misaligned. .
본 발명은 상술한 바와 같이 제반되는 문제를 해결하기 위하여 안출한 것으로, 그 목적은 베이스에 고정되는 레이저 다이오드의 위치 및 각도를 용이하게 조정할 수 있도록 하여 조립시 발생되는 광축 및 강도분포의 틀어짐을 개선한 광 픽업의 레이저 다이오드 조정장치를 제공하는데 있다.The present invention has been made to solve the problems described above, the object of which is to easily adjust the position and angle of the laser diode fixed to the base to improve the distortion of the optical axis and intensity distribution generated during assembly To provide a laser diode control device of an optical pickup.
상기 목적을 달성하기 위한 본 발명에 따른 광 픽업의 레이저 다이오드 조정장치는 일부분에 빔투과공이 관통 형성된 베이스의 일측면에 슬라이딩되면서 위치조정이 가능하게 설치되고, 중간부분에는 빔투과공과 연통되는 관통공이 형성되며, 설치면의 반대면에는 반구가 형성된 위치조정블록과, 일측면에는 위치조정블록의 반구와 대응되는 구좌홈이 형성되어 위치조정블록을 중심으로 슬라이딩되면서 회전되도록 조립되고, 중간부분에는 관통공과 연통되는 결합공이 관통 형성된 틸트조정블록과, 결합공에 결합되어 틸트조정블록과 함께 회전하면서 틸트가 조정되고, 전방의 캡부분은 위치조정블록의 관통공 내에서 소정 각도로 유동가능하게 삽입되며, 광 빔을 발광시키는 레이저 다이오드를 포함하여 구성된다.Laser diode adjusting device of the optical pickup according to the present invention for achieving the above object is installed so as to adjust the position while sliding on one side of the base through which the beam through hole is formed, the through hole communicating with the beam through hole in the middle portion Positioning block is formed on the opposite side of the installation surface, hemisphere is formed on the side, and one side groove is formed to correspond to the hemisphere of the positioning block is assembled to rotate while sliding around the positioning block, the middle part through Tilt adjustment block is formed through the coupling hole communicating with the ball, and the coupling is coupled to the coupling hole and the tilt is adjusted while rotating together with the tilt adjustment block, the front cap portion is inserted into the through hole of the positioning block to be movable at a predetermined angle. And a laser diode for emitting the light beam.
도 1은 일반적인 광 픽업의 구성을 개략적으로 나타낸 구성도,1 is a configuration diagram schematically showing a configuration of a general optical pickup;
도 2는 광 픽업에서 레이저 다이오드가 베이스에 조립된 종래의 상태를 개략적으로 나타낸 단면도,2 is a cross-sectional view schematically showing a conventional state in which a laser diode is assembled to a base in an optical pickup;
도 3은 본 발명에 따른 광 픽업의 레이저 다이오드 조정장치를 적용하여 레이저 다이오드가 베이스에 조립된 상태를 개략적으로 나타낸 단면도,3 is a cross-sectional view schematically showing a state in which a laser diode is assembled to a base by applying the laser diode adjusting device of the optical pickup according to the present invention;
도 4는 도 3에서 위치조정블록의 작동 상태를 나타낸 작동도,4 is an operation diagram showing an operating state of the position adjustment block in FIG.
도 5는 도 3에서 틸트조정블록의 작동 상태를 나타낸 작동도.5 is an operation diagram showing an operating state of the tilt adjustment block in FIG.
◎ 도면의 주요부분에 대한 부호의 설명 ◎◎ Explanation of symbols for main part of drawing
1: 레이저 다이오드 2: 그래이팅 렌즈1: laser diode 2: grating lens
3: 빔 스플리터 4: 콜리메이팅 렌즈3: beam splitter 4: collimating lens
5: 대물렌즈 6: 광 디스크5: objective 6: optical disc
7: 센서렌즈 8: 광 검출기7: sensor lens 8: light detector
10: 베이스 12: 빔투과공10: base 12: beam penetration
20: 위치조정블록 22: 반구20: positioning block 22: hemisphere
24: 관통공 30: 틸트조정블록24: through hole 30: tilt adjustment block
32: 구좌홈 34: 결합공32: accounting groove 34: coupling hole
이하, 첨부된 도면들을 참조하여 본 발명에 대해 상세히 설명하면 다음과 같다. 그리고 종래와 동일한 구성부품은 동일한 명칭과 부호를 사용하여 설명한다.Hereinafter, the present invention will be described in detail with reference to the accompanying drawings. The same components as in the prior art will be described using the same names and symbols.
도 3은 본 발명에 따른 광 픽업의 레이저 다이오드 조정장치를 적용하여 레이저 다이오드가 베이스에 조립된 상태를 개략적으로 나타낸 단면도이고, 도 4와 도 5는 도 3의 작동도이다.3 is a cross-sectional view schematically illustrating a state in which a laser diode is assembled to a base by applying a laser diode adjusting device of an optical pickup according to the present invention, and FIGS. 4 and 5 are operation diagrams of FIG. 3.
도 3을 참고하면, 본 발명은 통상적으로 데크 베이스 상에서 광디스크의 반경 반향을 따라 왕복 이동가능하게 설치되는 베이스(10)의 일측면에 구성되고, 광 빔을 발광시키는 레이저 다이오드(1)의 위치 및 틸트를 조정하는 위치조정블록(20) 및 틸트조정블록(30)으로 구성된다.Referring to FIG. 3, the present invention is typically configured on one side of the base 10 which is installed on the deck base so as to be reciprocally moved along the radial direction of the optical disc, and the position of the laser diode 1 emitting light beams and It is composed of a position adjusting block 20 and a tilt adjusting block 30 for adjusting the tilt.
베이스(10)의 일부분에는 빔투과공(12)이 관통 형성되고, 빔투과공(12)이 형성된 부분의 베이스(10) 일측면에는 위치조정블록(20)이 면접되어 위치조정이 가능하도록 도면상의 X-Y축 방향으로 슬라이딩가능하게 설치된다.A portion of the base 10 has a beam penetrating hole 12 formed therethrough, and a position adjusting block 20 is interviewed on one side of the base 10 of the portion where the beam penetrating hole 12 is formed so that the position can be adjusted. It is slidably installed in the XY axis direction of an image.
위치조정블록(20)의 중간부분에는 베이스(10)의 빔투과공(12)과 연통되는 관통공(24)이 형성되며, 설치면의 반대면에는 반구(22)가 형성된다.The middle portion of the positioning block 20 is formed with a through hole 24 communicating with the beam through hole 12 of the base 10, the hemisphere 22 is formed on the opposite side of the installation surface.
틸트조정블록(30)은 일측면에 위치조정블록(20)의 반구(22)와 대응되는 구좌홈(32)이 형성된다. 즉, 반구(22)와 구좌홈(32)이 슬라이딩가능하게 밀착되도록 조립되어 틸트조정블록(30)은 위치조정블록(20)을 중심으로 슬라이딩되면서 회전하게 된다.Tilt adjustment block 30 is formed on one side is an accounting groove 32 corresponding to the hemisphere 22 of the position adjustment block 20. That is, the hemisphere 22 and the seat groove 32 are assembled to be in close contact with the slide so that the tilt adjustment block 30 is rotated while sliding about the position adjustment block 20.
또한, 틸트조정블록(30)의 중간부분에는 위치조정블록(20)의 관통공(24)과 연통되는 결합공(34)이 관통 형성된다.In addition, the intermediate portion of the tilt adjustment block 30 is formed through the coupling hole 34 in communication with the through hole 24 of the position adjustment block 20.
그리고, 결합공(34)에는 레이저 다이오드(1)가 결합된다.Then, the laser diode 1 is coupled to the coupling hole 34.
레이저 다이오드(1)는 결합공(34)에 결합되어 틸트조정블록(30)과 함께 회전하면서 틸트를 조정하게 되고, 전방의 캡부분은 위치조정블록(20)의 관통공(24) 내에서 소정 각도로 유동가능하게 삽입된다.The laser diode 1 is coupled to the coupling hole 34 to adjust the tilt while rotating with the tilt adjustment block 30, the front cap portion is predetermined in the through hole 24 of the positioning block 20. It is inserted into the flow at an angle.
여기에서, 레이저 다이오드(1)의 틸트 조정을 위한 틸트조정블록(30)의 회전중심축은 레이저 다이오드(1)의 발광점에 두는 것이 바람직하다.Here, it is preferable that the center of rotation of the tilt adjustment block 30 for tilt adjustment of the laser diode 1 is placed at the light emitting point of the laser diode 1.
또한, 위치조정블록(20)은 베이스(10)의 일측면을 따라 슬라이딩되면서 위치가 조정된 후 베이스(10)에 본딩에 의해 고정되고, 틸트조정블록(30)은 반구(22)를 중심으로 회전하면서 틸트가 조정된 후 위치조정블록(20)에 본딩에 의해 고정되며, 레이저 다이오드(1)는 틸트조정블록(30)의 결합공(34)에 결합되어 본딩에 의해 고정된다.In addition, the positioning block 20 is fixed by bonding to the base 10 after the position is adjusted while sliding along one side of the base 10, the tilt adjustment block 30 is centered on the hemisphere 22 After the tilt is adjusted while rotating, it is fixed to the positioning block 20 by bonding, and the laser diode 1 is coupled to the coupling hole 34 of the tilt adjusting block 30 and fixed by bonding.
이제, 이와 같이 구성된 본 발명의 작동 및 작용 효과를 설명한다.Now, the operation and operational effects of the present invention thus constructed will be described.
본 발명은 레이저 다이오드(1)에서 출사되는 광 빔의 광축이 조립공차 등과 같은 요인으로 어긋나는 경우에는 도 4에 도시된 바와 같이 위치조정블록(20)을 X-Y방향으로 슬라이딩시키면서 광축을 일치시킨다. 즉, 위치조정블록(20)을 이동시키면 틸트조정블록(30)과 함께 레이저 다이오드(1)가 이동되기 때문에 광축을 조정할 수 있게 된다. 이때, 위치조정블록을 조정하는 방식은 도시되어 있지는 않지만 별도의 지그로 위치조정블록을 잡고 조정하면 된다.According to the present invention, when the optical axis of the light beam emitted from the laser diode 1 is shifted due to factors such as assembly tolerance, the optical axis is made to slide while sliding the positioning block 20 in the X-Y direction as shown in FIG. That is, when the position adjustment block 20 is moved, the optical axis can be adjusted because the laser diode 1 is moved together with the tilt adjustment block 30. At this time, the method of adjusting the position adjusting block is not shown, but may be adjusted by holding the position adjusting block with a separate jig.
또한, 레이저 다이오드(1)에서 출사되는 광 빔의 강도분포가 틀어지는 경우에는 도 5에 도시된 바와 같이 틸트조정블록(30)을 회전시키면서 레이저다이오드(1)의 방사각 틸트(틀어짐)를 조정하면 된다. 즉, 틸트조정블록(30)을 회전시키면 레이저 다이오드(1)도 함께 회전하게 되고, 레이저 다이오드의 각도가 변하기 때문에 출사되는 광 빔의 방사각이 틀어지게 되어 강도분포를 조정할 수 있게 된다. 이때, 틸트조정블록을 조정하는 방식은 도시되어 있지는 않지만 별도의 지그로 틸트조정블록을 잡고 조정하면 된다.In addition, when the intensity distribution of the light beam emitted from the laser diode 1 is distorted, as shown in FIG. 5, the tilt angle of the laser diode 1 is adjusted while rotating the tilt adjustment block 30. do. In other words, when the tilt adjustment block 30 is rotated, the laser diode 1 is also rotated together, and since the angle of the laser diode is changed, the radiation angle of the emitted light beam is changed so that the intensity distribution can be adjusted. In this case, the tilt adjusting block is not shown in the drawing but may be adjusted by holding the tilt adjusting block with a separate jig.
물론, 광 빔의 위치 및 각도의 조정이 완료되면 위치조정블록(20)과 틸트조정블록(30)을 본딩에 의해 고정시켜 조정된 상태를 지속적으로 유지할 수 있도록 한다.Of course, when the adjustment of the position and angle of the light beam is completed, the positioning block 20 and the tilt adjustment block 30 are fixed by bonding to maintain the adjusted state continuously.
이처럼, 본 발명은 위치조정블록(20)과 틸트조정블록(30)의 조정을 통해 레이저 다이오드(1)의 위치 및 각도를 용이하게 조정할 수 있기 때문에 발산되는 광 빔의 광축 및 강도분포의 틀어짐을 개선시킬 수 있으며, 이로 인해 제품의 불량률은 최소화시키고 공정 생산성 및 작업능률은 향상된다.As such, the present invention can easily adjust the position and angle of the laser diode (1) through the adjustment of the position adjustment block 20 and the tilt adjustment block 30, the distortion of the optical axis and intensity distribution of the emitted light beam This can minimize product defects and improve process productivity and efficiency.
또한, 광축과 강도분포가 일치되기 때문에 광 성능이 향상되고, 제품의 신뢰도가 좋아진다.In addition, since the optical axis and intensity distribution coincide, optical performance is improved and product reliability is improved.
한편, 상술한 본 발명은 베이스(10)상에서 빔투과공(12)이 끝나는 부분에 설치되는 레이저 다이오드(1)에서 출사된 광 빔을 광 디스크(6) 방향으로 반사시키는 빔 스플리터(3)와, 베이스(10)의 상부에 설치되어 빔 스플리터에서 반사된 광 빔을 광 디스크의 한점에 집광시키는 대물렌즈(5)와, 베이스(10)에 설치되어 광 디스크(6)에서 반사된 광 빔을 검출하여 전기적인 신호로 변환하는 광 검출기를 포함하여 구성된 광 픽업에 적용된다.On the other hand, the present invention described above and the beam splitter (3) for reflecting the light beam emitted from the laser diode (1) installed in the end portion of the beam transmission hole 12 on the base 10 in the direction of the optical disk (6) and And an objective lens 5 installed on the base 10 to focus the light beam reflected by the beam splitter at one point of the optical disk, and an optical beam installed on the base 10 and reflected by the optical disk 6. Applied to an optical pickup configured to include an optical detector that detects and converts it into an electrical signal.
또한, 광 픽업은 레이저 다이오드(1)와 빔 스플리터(3) 사이의 광 경로에는 광 빔을 분기시키는 그래이팅 렌즈(2)가 설치되고, 빔 스플리터(3)와 대물렌즈(5) 사이의 광 경로에는 입사되는 빔을 평행빔으로 변환시켜주는 콜리메이팅 렌즈(4)가 설치되며, 광 검출기의 상부에는 광 경로 상에 입사되는 빔을 광 검출기의 한점에 집광시켜 주는 센서렌즈(7)가 설치된다.In addition, the optical pickup is provided with a grating lens (2) for branching the light beam in the optical path between the laser diode (1) and the beam splitter (3), the light between the beam splitter (3) and the objective lens (5) The collimating lens 4 is installed in the path to convert the incident beam into a parallel beam, and the sensor lens 7 is installed in the upper part of the photo detector to focus the beam incident on the optical path at one point of the photo detector. do.
이상에서와 같이, 본 발명은 위치조정블록과 틸트조정블록을 통해 레이저 다이오드의 위치 및 각도를 자유롭게 조정하기 때문에 광축의 어긋남 및 강도분포의 틀어짐을 용이하게 개선시킬 수 있으며, 이로 인해 불량률이 최소화되고 안정된 품질 특성을 실현시키므로 제품의 성능이 향상되는 효과가 있다.As described above, since the present invention freely adjusts the position and angle of the laser diode through the positioning block and the tilt adjusting block, misalignment of the optical axis and distortion of the intensity distribution can be easily improved, thereby minimizing the defective rate. Since the stable quality characteristics are realized, the performance of the product is improved.
Claims (9)
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| KR10-2002-0028451A KR100467840B1 (en) | 2002-05-22 | 2002-05-22 | Laser diode setting device of optical pick-up |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| KR10-2002-0028451A KR100467840B1 (en) | 2002-05-22 | 2002-05-22 | Laser diode setting device of optical pick-up |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| KR20030090859A KR20030090859A (en) | 2003-12-01 |
| KR100467840B1 true KR100467840B1 (en) | 2005-01-24 |
Family
ID=32383985
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| KR10-2002-0028451A KR100467840B1 (en) | 2002-05-22 | 2002-05-22 | Laser diode setting device of optical pick-up |
Country Status (1)
| Country | Link |
|---|---|
| KR (1) | KR100467840B1 (en) |
Citations (11)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH0423225A (en) * | 1990-05-17 | 1992-01-27 | Ricoh Co Ltd | Light source unit for optical pickup device |
| JPH09219033A (en) * | 1995-12-04 | 1997-08-19 | Pioneer Electron Corp | Laser holder device |
| KR19990010944A (en) * | 1997-07-19 | 1999-02-18 | 구자홍 | Optical pickup device with adjustable distance on the optical axis |
| KR0135262Y1 (en) * | 1996-03-29 | 1999-03-20 | 김광호 | Laser diode control device of optic pick-up |
| KR20000016814U (en) * | 1999-02-09 | 2000-09-25 | 구자홍 | Apparatus For Adjusting Laser Diode |
| KR20000016813U (en) * | 1999-02-09 | 2000-09-25 | 구자홍 | Apparatus For Adjusting Laser Diode and Photo Diode |
| JP2001014700A (en) * | 1999-06-25 | 2001-01-19 | Yamaha Corp | Optical axis controller and optical pickup |
| KR100289601B1 (en) * | 1999-01-26 | 2001-05-02 | 이형도 | Apparatus for mounting a laser diode of pick-up unit |
| JP2001167463A (en) * | 1999-12-08 | 2001-06-22 | Mitsumi Electric Co Ltd | Laser beam emitting unit |
| KR100299644B1 (en) * | 1998-09-30 | 2001-09-06 | 전주범 | Optical pick-up |
| KR100387967B1 (en) * | 2000-12-28 | 2003-06-18 | 엘지전자 주식회사 | Position control apparatus of Laser Diode in Optical Pick-up |
-
2002
- 2002-05-22 KR KR10-2002-0028451A patent/KR100467840B1/en not_active IP Right Cessation
Patent Citations (11)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH0423225A (en) * | 1990-05-17 | 1992-01-27 | Ricoh Co Ltd | Light source unit for optical pickup device |
| JPH09219033A (en) * | 1995-12-04 | 1997-08-19 | Pioneer Electron Corp | Laser holder device |
| KR0135262Y1 (en) * | 1996-03-29 | 1999-03-20 | 김광호 | Laser diode control device of optic pick-up |
| KR19990010944A (en) * | 1997-07-19 | 1999-02-18 | 구자홍 | Optical pickup device with adjustable distance on the optical axis |
| KR100299644B1 (en) * | 1998-09-30 | 2001-09-06 | 전주범 | Optical pick-up |
| KR100289601B1 (en) * | 1999-01-26 | 2001-05-02 | 이형도 | Apparatus for mounting a laser diode of pick-up unit |
| KR20000016814U (en) * | 1999-02-09 | 2000-09-25 | 구자홍 | Apparatus For Adjusting Laser Diode |
| KR20000016813U (en) * | 1999-02-09 | 2000-09-25 | 구자홍 | Apparatus For Adjusting Laser Diode and Photo Diode |
| JP2001014700A (en) * | 1999-06-25 | 2001-01-19 | Yamaha Corp | Optical axis controller and optical pickup |
| JP2001167463A (en) * | 1999-12-08 | 2001-06-22 | Mitsumi Electric Co Ltd | Laser beam emitting unit |
| KR100387967B1 (en) * | 2000-12-28 | 2003-06-18 | 엘지전자 주식회사 | Position control apparatus of Laser Diode in Optical Pick-up |
Also Published As
| Publication number | Publication date |
|---|---|
| KR20030090859A (en) | 2003-12-01 |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| US5742383A (en) | Apparatus for measuring degree of inclination of objective lens for optical pickup | |
| JP2000113471A (en) | Optical pickup of optical disk drive | |
| KR100467840B1 (en) | Laser diode setting device of optical pick-up | |
| JP2002133708A (en) | Adjusting and assembling device for optical unit | |
| JPH087315A (en) | Optical pickup | |
| JP2835778B2 (en) | Optical head and its adjustment method | |
| US7792008B2 (en) | Optical pickup apparatus | |
| EP0057339A1 (en) | Optical focus detecting system and optical recorder-reader including such a system | |
| US6798819B1 (en) | Optical pickup apparatus and method of manufacturing the same | |
| JP2000293860A (en) | Method for adjusting optical pickup | |
| JP3377692B2 (en) | Optical element mounting method | |
| KR950013700B1 (en) | Optical axis control method & control apparatus | |
| KR100432660B1 (en) | Optical pickup device | |
| KR100207271B1 (en) | A making condition measuring device of lens holder for shaft sliding actuator | |
| KR0135262Y1 (en) | Laser diode control device of optic pick-up | |
| KR200346425Y1 (en) | Apparatus For Adjusting Laser Diode and Photo Diode | |
| KR100289565B1 (en) | Laser Diode Modules for Optical Pickups | |
| JP2782014B2 (en) | Optical device for optical disk | |
| KR20010017409A (en) | Pickup tilt adjusting apparatus | |
| JP3518904B2 (en) | Optical pickup | |
| JP2001155378A (en) | Method and device for assembling optical pickup device | |
| JPH0785482A (en) | Optical head and optical axis regulating method therefor | |
| JPH0793798A (en) | Optical head | |
| KR20050049178A (en) | Apparatus for measuring optical field angle and optical intensity distribution of a DVD recorder pick-up | |
| JP2003022565A (en) | Assembly adjusting device and assembly adjusting method for optical unit |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| A201 | Request for examination | ||
| E902 | Notification of reason for refusal | ||
| E701 | Decision to grant or registration of patent right | ||
| GRNT | Written decision to grant | ||
| FPAY | Annual fee payment |
Payment date: 20130107 Year of fee payment: 9 |
|
| FPAY | Annual fee payment |
Payment date: 20140113 Year of fee payment: 10 |
|
| FPAY | Annual fee payment |
Payment date: 20150113 Year of fee payment: 11 |
|
| FPAY | Annual fee payment |
Payment date: 20160113 Year of fee payment: 12 |
|
| FPAY | Annual fee payment |
Payment date: 20170113 Year of fee payment: 13 |
|
| FPAY | Annual fee payment |
Payment date: 20180112 Year of fee payment: 14 |
|
| LAPS | Lapse due to unpaid annual fee |