KR970000083Y1 - Scanning apparatus - Google Patents
Scanning apparatus Download PDFInfo
- Publication number
- KR970000083Y1 KR970000083Y1 KR2019910014037U KR910014037U KR970000083Y1 KR 970000083 Y1 KR970000083 Y1 KR 970000083Y1 KR 2019910014037 U KR2019910014037 U KR 2019910014037U KR 910014037 U KR910014037 U KR 910014037U KR 970000083 Y1 KR970000083 Y1 KR 970000083Y1
- Authority
- KR
- South Korea
- Prior art keywords
- optical
- light
- concave
- recording medium
- spot
- Prior art date
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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
- G11B7/08—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
- G11B7/0925—Electromechanical actuators for lens positioning
- G11B7/0933—Details of stationary parts
-
- 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
Abstract
내용 없음.No content.
Description
제1도는 종래 광픽업용 스캐닝장치를 개략적으로 나타낸 배치도.1 is a layout view schematically showing a conventional scanning device for optical pickup.
제2도는 본 고안에 따른 광픽업용 스캐닝장치를 개략적으로 나타낸 배치도.2 is a layout view schematically showing a scanning device for an optical pickup according to the present invention.
* 도면의 주요부분에 대한 부호의 설명* Explanation of symbols for main parts of the drawings
10' : 광학계 30' : 오목갈바노미터미러10 ': optical system 30': concave galvanometer mirror
40 : 광테이프40: light tape
본 고안은 정보를 광학적으로 기록하고 재생하기 위하여 광테이프와 같은 광기록매체를 광으로 스캐닝하는 광픽업용 스캐닝장치에 관한 것으로서, 특히 기록매체상에 광스폿을 형성하고 광스폿을 이동시키는 기능을 동시적으로 수행하는 오목한 갈바노미터미러를 구비하는 광픽업용 스캐닝장치에 관한 것이다.The present invention relates to an optical pickup scanning device that optically scans an optical recording medium such as an optical tape in order to optically record and reproduce information. In particular, the present invention provides a function of forming an optical spot and moving an optical spot on the recording medium. A scanning device for optical pickup having a concave galvanometer mirror that performs simultaneously.
일반적으로 광픽업용 스캐닝장치는 레이저 광원에서 방출되는 레이저 광을 1차적으로 콜리메팅 렌즈를 사용하여 평행광으로 만든 후 그 평행광을 대물렌즈로 집속하여 광테이프에 광스폿을 형성한다. 그리고 그 광스폿으로 광테이프를 스캐닝하기 위하여 광테이프에 입사되는 광을 주기적으로 왕복 편향시킨다. 광편향을 위한 광학소자로는 잘 알려진 바와 같은 갈바노미터미러와 초음파광편향기가 있는데, 광테이프에 대하여는 광효율 등을 감안하여 주로 갈바노미터미러가 사용되고 있었다.In general, an optical pickup scanning device primarily forms laser light emitted from a laser light source into parallel light using a collimating lens, and then concentrates the parallel light into an objective lens to form an optical spot on the optical tape. The light incident on the light tape is periodically reciprocated in order to scan the light tape into the light spot. As optical devices for optical deflection, galvanometer mirrors and ultrasonic light deflectors are well known, and galvanometer mirrors have been mainly used for optical tapes in consideration of light efficiency.
이러한 종래의 광픽업용 스캐닝장치를 제1도에 도시하였다. 즉, 종래의 광픽업용 스캐닝장치는 크게 광학계(10)와 대물렌즈(20) 및 갈바노미터미러(30)로 이루어진 것이다. 광학계(10)는 전술한 레이저 광원으로서의 기록용 레이저(11a)와 재생용 레이저(11b), 각 레이저 광을 평행광으로 만드는 콜리메이팅 렌즈(12a, 12b), 그 평행광의 입사경로와 반사경로를 가르는 4개의 광분할기(13a-13b), 입사하는 평행광을 확산시키는 확산렌즈(14), 광테이프(40)에서 반사되어 오는 평행광을 집속하는 2개의 집속렌즈(15a, 15b), 그 반사의 평행광으로부터 전기적 재생 및 제어신호를 검출하는 2개의 광검출기(16a, 16b), 그리고 빔덤프(17a, 17b)로 구성되어 있다. 여기서 확산렌즈(14)는 전술한 대물렌즈(20)의 집속도를 높이기 위한 것이다.The conventional optical pickup scanning apparatus is shown in FIG. That is, the conventional optical pickup scanning device is composed of the optical system 10, the objective lens 20 and the galvanometer mirror 30. The optical system 10 includes the recording laser 11a and the reproducing laser 11b as the laser light source described above, collimating lenses 12a and 12b for making each laser light into parallel light, and an incident path and a reflection path of the parallel light. Four splitters 13a-13b for splitting, a diffusion lens 14 for diffusing parallel light incident thereto, two focusing lenses 15a, 15b for focusing parallel light reflected from the light tape 40, and the reflection thereof It consists of two photodetectors 16a and 16b and beam dumps 17a and 17b which detect electrical reproduction and control signals from the parallel light beams. The diffusion lens 14 is to increase the focusing speed of the objective lens 20 described above.
이러한 종래의 스캐닝장치는, 광테이프에 광스폿을 형성하기 위하여 대물렌즈를 사용하므로 전술한 확산렌즈를 부가하여야 하는 등 부품수가 증가하여 고가인 동시에 부피가 커서 소형화할 수 없는 문제점을 가진다. 또한 레이저 및 광검출기와 광테이프 사이의 광로가 길어 에러가 잦고 특히 매물렌즈의 수차로 인하 기록재생특성이 저하되는 등의 문제점도 있었던 것이다.Such a conventional scanning device has a problem in that the number of parts increases due to the use of an objective lens to form a light spot on an optical tape, such as the need to add the above-mentioned diffusion lens, and thus, it is expensive and bulky and cannot be miniaturized. In addition, there is a problem that the optical path between the laser and the photodetector and the optical tape is long, so that errors are frequent and recording and reproduction characteristics are degraded due to the aberration of the lens.
종전에는 이러한 문제점을 주로 각 부품의 조립정도를 높이고 한편으로는 회로적인 수단을 이용하여 전술한 대물렌즈나 갈바노미터미러에 대한 서보제어의 성능을 높이는 것으로 해결하려 하였었으나 한계에 부딪혀 그 실효를 거두지 목하는 실정이었다.Previously, this problem was mainly solved by increasing the assembly accuracy of each component and improving the performance of the servo control for the objective lens or galvanometer mirror by using a circuit means. I was reaping the situation.
본 고안의 목적은 상기한 대물렌즈를 제거하여 그로 인한 제반 문제점을 근본적으로 해결함으로써, 저가이고 소형이며 기록재생특성이 강화된 광픽업용 스캐닝장치를 제공함에 있다.It is an object of the present invention to provide a scanning device for optical pickup that is inexpensive, compact, and has enhanced recording and reproducing characteristics by eliminating the above-described objective lens and solving the problems inherently.
상기 목적을 달성하기 위하여 본 고안은,The present invention to achieve the above object,
정보를 기록재상하기 위하여 광기록매체를 광으로 스캐닝하는 광픽업용 스캐닝장치에 있어서, 상기 광기록매체를 향해 평행광빔을 투사하며 그로부터 반사되는 광을 수광하여 신호를 검출하는 광학계와, 상기 평행광빔을 상기 광기록매체 상에 광스폿으로 집속되도록 반사시키는 오목한 반사면을 가지며 그 집속되는 광스폿이 광기록매체위를 이동하도록 소정각도로 왕복회전되는 오목갈바노미터미러를 구비하여 되는 것을 특징으로 하는 광픽업용 스캐닝장치를 제공한다.An optical pickup scanning apparatus for scanning an optical recording medium with light to record information, comprising: an optical system for projecting a parallel light beam toward the optical recording medium and receiving light reflected therefrom and detecting a signal; And a concave reflecting surface for reflecting light on the optical recording medium so as to be focused as an optical spot, and having the concave galvanometer mirror reciprocally rotated at a predetermined angle to move the focused optical spot on the optical recording medium. It provides a scanning device for an optical pickup.
이와 같은 본 고안의 바람직한 실시예를 첨부된 도면에 의거하여 상세하게 설명하면 다음과 같다.When described in detail with reference to the accompanying drawings a preferred embodiment of the present invention as follows.
본 고안에 따른 광픽업용 스캐닝장치는 제2도와 같이, 광학계(10')와 오목갈바노미터미러(30')로 이루어진 것이다.The scanning device for optical pickup according to the present invention is composed of an optical system 10 'and a concave galvanometer mirror 30', as shown in FIG.
광학계(10')는 기록용 레이저(11a)와 재생용 레이저(11b), 각 레이저 광을 평행광으로 만드는 콜리메이팅 렌즈(12a, 12b), 그 평행광의 입사경로와 반사경로를 가르는 4개의 광분할기(13a-13b), 입사하는 평행광을 확산시키는 확산렌즈(14), 광테이프(40)에서 반사되어 오는 평행광을 집속하는 2개의 집속렌즈(15a, 15b), 그 반상의 평행광으로부터 전기적 재생 및 제어신호를 검출하는 2개의 광검출기(16a, 16b), 그리고 빔덤프(17a, 17b)로 구성되어 있다. 즉, 전술한 종래의 대물렌즈와 확산렌즈가 제거되는 대신 오목갈바노미터미러(30')를 구비한 것이다.The optical system 10 'includes a recording laser 11a and a reproducing laser 11b, collimating lenses 12a and 12b for making each laser light into parallel light, and four light beams separating the incident path and the reflection path of the parallel light. From the splitters 13a-13b, the diffusion lens 14 for diffusing the incident parallel light, the two focusing lenses 15a, 15b for condensing the parallel light reflected from the optical tape 40, and the parallel light of the opposite phase. It consists of two photodetectors 16a and 16b for detecting electrical reproduction and control signals, and beam dumps 17a and 17b. That is, the concave galvanometer mirror 30 'is provided instead of the above-described conventional objective lens and diffusion lens.
오목갈바노미터미러(30')는 구면이나 비구면 또는 포물면 중 어느 한 형태의 오목한 반사면(31)을 가진다. 이 오목갈바노미터미러(30')는 광학계(10')로부터 투사되는 평행광이 그 반사면(31)에 의하여 광테이프(40)에 집속되도록 하는 위치에 배치되고 또한 그 광테이프(40)에 집속되는 광스폿이 이동하도록 통상과 같이 왕복회전작동되는 것이다.The concave galvanometer mirror 30 'has a concave reflective surface 31 of any type, either spherical, aspherical or parabolic. The concave galvanometer mirror 30 'is disposed at a position where the parallel light projected from the optical system 10' is focused on the optical tape 40 by its reflection surface 31 and the optical tape 40 The reciprocating rotation is performed as usual to move the light spot focused on the.
이러한 본 고안에 따르면 우선 대물렌즈와 확산렌즈의 제거로 가격을 낮출 수 있으며, 부피가 축소되므로 종래에 비하여 소형화가 가능하다. 또한 광학적으로는 광학계와 광테이프 사이의 광로가 짧아지고 특히 오목갈바노미터미러의 거울상 반사면을 이용함으로써 대물렌즈의 수차가 제거되므로 에러가 적게 나타나고 기록재생특성이 좋아지는 등 제품의 신뢰도를 크게 향상시킬 수 있는 지극히 효과적인 고안이다.According to the present invention, first, the price can be reduced by removing the objective lens and the diffusion lens, and since the volume is reduced, the size of the present invention can be reduced. In addition, the optical path between the optical system and the optical tape is shortened and the aberration of the objective lens is eliminated by using the mirror image reflector of the concave galvanometer mirror, resulting in less error and better recording and playback characteristics. It is an extremely effective design that can be done.
Claims (1)
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| KR2019910014037U KR970000083Y1 (en) | 1991-08-30 | 1991-08-30 | Scanning apparatus |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| KR2019910014037U KR970000083Y1 (en) | 1991-08-30 | 1991-08-30 | Scanning apparatus |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| KR930005306U KR930005306U (en) | 1993-03-22 |
| KR970000083Y1 true KR970000083Y1 (en) | 1997-01-04 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| KR2019910014037U KR970000083Y1 (en) | 1991-08-30 | 1991-08-30 | Scanning apparatus |
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| Country | Link |
|---|---|
| KR (1) | KR970000083Y1 (en) |
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1991
- 1991-08-30 KR KR2019910014037U patent/KR970000083Y1/en not_active IP Right Cessation
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| Publication number | Publication date |
|---|---|
| KR930005306U (en) | 1993-03-22 |
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