KR19990002601A - Gwangju Yarn Equipment - Google Patents
Gwangju Yarn Equipment Download PDFInfo
- Publication number
- KR19990002601A KR19990002601A KR1019970026256A KR19970026256A KR19990002601A KR 19990002601 A KR19990002601 A KR 19990002601A KR 1019970026256 A KR1019970026256 A KR 1019970026256A KR 19970026256 A KR19970026256 A KR 19970026256A KR 19990002601 A KR19990002601 A KR 19990002601A
- Authority
- KR
- South Korea
- Prior art keywords
- focusing lens
- lens
- focal length
- scanned
- passing
- Prior art date
Links
Abstract
본 발명은 광주사장치에 관한 것이다.The present invention relates to an optical scanning device.
본 발명은 포커싱렌즈의 전방에 빔의 직경을 조절하여 포커싱렌즈로 주사되는 빔의 초점거리가 변하도록 하는 수단을 마련함으로써, 포커싱렌즈를 가공하지 않더라도 두께가 다른 디스크의 정보재생이 가능하게 되는 광주사장치에 관한 것으로서, 특히 광원수단에서 출사된 빔이 콜리메이트렌즈를 거치면서 평행빔으로 변한 다음 포커싱렌즈를 거쳐 디스크의 표면으로 주사되는 장치에 있어서, 상기 콜리메이트렌즈와 포커싱렌즈의 사이에 설치되고 상기 콜리메이트렌즈에서 출사되는 빔의 직경을 조절하여 상기 포커싱렌즈쪽으로 주사시키면 초점거리가 조절되는 빔조절수단이 구비된 특징이 있다.The present invention provides a means for adjusting the diameter of the beam in front of the focusing lens so that the focal length of the beam scanned by the focusing lens can be changed, thereby enabling information reproduction of a disc having a different thickness without processing the focusing lens. In particular, in the apparatus, in which a beam emitted from a light source means is converted into a parallel beam while passing through a collimating lens, and then scanned through a focusing lens to the surface of a disk, wherein the beam is installed between the collimating lens and the focusing lens. And a beam adjusting means for adjusting the diameter of the beam emitted from the collimating lens and scanning the focusing lens to adjust the focal length.
Description
제1도는 일반적인 광주사장치의 계통도,1 is a schematic diagram of a general optical scanning device,
제2도는 종래 포커싱렌즈의 단면도,2 is a cross-sectional view of a conventional focusing lens,
제3도는 본 발명 광주사장치의 계통도,3 is a system diagram of the optical scanning device of the present invention,
제4도(가)(나)는 본 발명 빔조절수단의 단면도이다.4 (a) (b) is a cross-sectional view of the beam adjusting means of the present invention.
*도면의 주요부분에 대한 부호의 설명** Description of the symbols for the main parts of the drawings *
10:광원수단12:콜리메이트렌즈10: light source means 12: collimated lens
13:포커싱렌즈14:디스크13: Focusing lens 14: Disc
16:빔조절수단17:산란부16: beam control means 17: scattering unit
18:내측빔19:외측빔18: inner beam 19: outer beam
본 발명은 광주사장치에 관한 것으로서, 더욱 상세하게는 포커싱렌즈의 전방에 빔조절수단을 설치하여 포커싱렌즈를 거친 빔의 초점거리가 변하도록 함으로써, 포커싱렌즈를 단순화시키더라도 두께가 다른 디스크의 정보가 재생되어 포커싱렌즈의 제작성이 향상되는 광주사장치에 관한 것이다.The present invention relates to an optical scanning device, and more particularly, by installing a beam adjusting means in front of the focusing lens so that the focal length of the beam passing through the focusing lens is changed, so as to simplify the focusing lens information of the disk having a different thickness. The present invention relates to a light reflector which is reproduced to improve the manufacturability of a focusing lens.
일반적으로 광주사장치는 콤팩트디스크플레이의 내부에 설치되어 디스크의 정보를 읽어 들이는 픽업에 사용된다. 제1도는 광주사장치를 나타낸 것으로 광원수단(1)에서 출사되는 빔 빔스플리터(2)를 거쳐 콜리메이트렌즈(3)쪽으로 주사된다. 이때 콜리메이트렌즈(3)는 빔을 평행빔으로 변환시켜 포커싱렌즈(4) 쪽으로 주사시키며 포커싱렌즈(4)를 거친 빔은 초점의 형태로 디스크(5)의 표면에 주사된다. 그리고 디스크(5)에 주사된 빔은 주사경로의 역으로 반사되고 빔스플리터(2)에서 포토다이오드(6) 쪽으로 주사되어 디스크(5)의 정보가 재생된다.In general, Gwangju presidential device is installed in the compact disc play is used for the pickup to read the information of the disc. FIG. 1 shows the optical scanning device, and is scanned toward the collimated lens 3 via the beam beam splitter 2 emitted from the light source means 1. At this time, the collimated lens 3 converts the beam into a parallel beam and scans it toward the focusing lens 4, and the beam passing through the focusing lens 4 is scanned onto the surface of the disk 5 in the form of a focus. The beam scanned on the disk 5 is reflected in the reverse direction of the scanning path, and is scanned from the beam splitter 2 toward the photodiode 6 to reproduce the information of the disk 5.
이처럼 구성된 종래의 광주사장치는 광원수단(1)에서 출사되는 빔이 포커싱렌즈(4)를 거치면서 초점의 형태로 디스크(5)의 표면에 주사된다. 그러나 디스크(5)가 콤팩트디스크(CD)와 디지탈비디오디스크(DVD) 등 종류별로 두께의 차이를 나타냄으로 이들 디스크(5)를 재생하기위해 초점거리를 변환시켜야 된다.The conventional optical fiber scanning device configured as described above is scanned on the surface of the disk 5 in the form of focus while the beam emitted from the light source means 1 passes through the focusing lens 4. However, since the disc 5 shows a difference in thickness for each type, such as a compact disc (CD) and a digital video disc (DVD), the focal length must be changed to reproduce these discs 5.
제2도는 종래 포커싱렌즈의 단면도로써, 포커싱렌즈(4)의 표면에 원형의 산란홈(7)을 가공하여 빔의 초점거리가 변하도록 하였다.2 is a cross-sectional view of a conventional focusing lens, in which circular scattering grooves 7 are processed on the surface of the focusing lens 4 to change the focal length of the beam.
그러나 포커싱렌즈(4)의 표면에 산란홈(7)을 가공하는 과정에서 가공정밀도가 틀려지면 초점이 불균일해져 디스크의 재생이 어렵게 되는 단점이 있고 또한 포커싱렌즈(4)를 비구면화해야 됨으로 제작성이 저하되는 등의 문제점이 있다.However, if the processing precision is different in the process of processing the scattering grooves 7 on the surface of the focusing lens 4, the focus is uneven, which makes it difficult to play the disc. In addition, the focusing lens 4 must be aspherized. There is a problem such as deterioration.
본 발명은 상기와 같은 종래의 여러가지 문제점을 해결하기 위해 안출한 것으로서, 본 발명의 목적은 포커싱렌즈의 전방에 빔의 직경을 조절하여 포커싱렌즈로 주사되는 빔의 초점거리가 변하도록 하는 수단을 마련함으로써, 포커싱렌즈를 가공하지 않더라도 두께가 다른 디스크의 정보재생이 가능하게 되는 광주사장치를 제공함에 있다.The present invention has been made to solve the various problems as described above, an object of the present invention is to provide a means for changing the focal length of the beam scanned by the focusing lens by adjusting the diameter of the beam in front of the focusing lens. Thus, even if the focusing lens is not processed, it is possible to provide a photo-preservation device capable of reproducing information of a disc having a different thickness.
상기 목적을 달성하기 위하여 본 발명에 따른 광주사장치는, 광원수단에서 출사된 빔이 콜리메이트렌즈를 거치면서 평행빔으로 변한 다음 포커싱렌즈를 거쳐 디스크의 표면으로 주사되는 장치에 있어서, 상기 콜리메이트렌즈와 포커싱렌즈의 사이에 설치되고 상기 콜리메이트렌즈에서 출사되는 빔의 직경을 조절하여 상기 포커싱렌즈 쪽으로 주사시키면 초점거리가 조절되는 빔조절수단이 구비된 점에 그 특징이 있다.In order to achieve the above object, the optical scanning device according to the present invention is a device in which a beam emitted from a light source means is converted into a parallel beam while passing through a collimating lens, and then scanned through a focusing lens to the surface of the disc. And a beam adjusting means installed between the focusing lens and the beam of the collimated lens exiting the collimating lens to be scanned toward the focusing lens to adjust the focal length.
이하 첨부 도면에 따라 본 발명에 따른 장치의 바람직한 실시예를 상세히 설명하면 다음과 같다.Hereinafter, a preferred embodiment of the device according to the present invention according to the accompanying drawings in detail as follows.
제3도는 본 발명 광주사장치의 계통도로서, 제1도와 동일 구성요소는 동일 부호를 사용하여 본 발명을 설명한다. 본 발명은 콜리메이트렌즈(12)와 포커싱렌즈(13)의 사이에 주사되는 빔의 직경을 조절하는 빔조절수단(16)의 구비된다. 빔조절수단(16)은 콜리메이트렌즈(12)를 거치면서 평행빔으로 변한 빔의 일부가 포커싱렌즈(13)쪽으로 주사되지 않도록 산란시키는 산란부(17)를 갖는다. 산란부(17)는 원형의 튜브형태로 구성되며 산란부(17)의 내측을 통과하는 내측빔(18)은 포커싱렌즈(13)를 거쳐 초점거리가 멀어지게 되고 산란부(17)의 외측을 통과하는 외측빔(19)은 포커싱렌즈(13)를 거쳐 초점거리가 짧아진다.3 is a schematic diagram of the optical scanning apparatus of the present invention, in which the same components as those in FIG. 1 are described using the same reference numerals. The present invention is provided with beam adjusting means (16) for adjusting the diameter of the beam scanned between the collimated lens (12) and the focusing lens (13). The beam adjusting means 16 has a scattering portion 17 which scatters a portion of the beam which is converted into a parallel beam while passing through the collimating lens 12 so as not to be scanned toward the focusing lens 13. The scattering unit 17 is configured in the form of a circular tube, and the inner beam 18 passing through the inside of the scattering unit 17 passes through the focusing lens 13 to be far from the focal length and the outside of the scattering unit 17. The outer beam 19 passing through the focusing lens 13 has a short focal length.
이처럼 구성된 본 발명은 광원수단(10)에서 출사된 빔이 콜리메이트렌즈(12)를 거쳐 평행빔으로 변한 다음 빔조절수단(16)으로 출사된다. 이때 출사되는 빔은 빔조절수단(16)의 산란부(17)를 제외한 산란부(17)의 내,외측을 통과하게 되며 이 과정에서 초점거리가 변하게 된다. 제4도(가)는 빔조절수단(16)의 산란부(17) 내측을 통과하는 내측빔(18)을 나타낸 것으로 내측빔(18)은 포커싱렌즈(13)를 거치면서 초점거리가 멀어진다. 이때 콤팩트디스크의 정보가 재생되며 또한 제4도(나)에서와 같이 산란부(17)의 외측을 통과하는 외측빔(19)의 경우 포커싱렌즈(13)를 거치면서 초점거리가 짧아지고 디지탈비디오디스크와 같은 디스크(14)의 정보가 재생된다.According to the present invention configured as described above, the beam emitted from the light source means 10 is converted into a parallel beam through the collimated lens 12 and then emitted to the beam adjusting means 16. In this case, the emitted beam passes through the inside and the outside of the scattering unit 17 except the scattering unit 17 of the beam control unit 16, and the focal length is changed in this process. 4 (a) shows the inner beam 18 passing through the scattering unit 17 of the beam adjusting means 16. The inner beam 18 passes through the focusing lens 13 and the focal length is farther away. . At this time, the information of the compact disc is reproduced, and in the case of the outer beam 19 passing through the outside of the scattering unit 17 as shown in FIG. 4B, the focal length is shortened while passing through the focusing lens 13 and the digital video is obtained. Information of the disc 14 such as the disc is reproduced.
이상에서와 같이 본 발명에 따르면 빔조절수단의 산란부에 의해 빔의 직경이 조절된 상태로 포커싱렌즈쪽으로 출사된다. 따라서 직경이 작은 내측빔이 포커싱렌즈쪽으로 출사되면 초점거리가 멀어지고 또한 직경이 큰 외측빔이 출사되면 초점거리가 짧아지짐으로 두께가 서로 다른 디스크의 정보를 재생할 수 있으며 또한 포커싱렌즈에 별도의 가공을 할 필요가 없음으로 생산성이 향상되는 등의 효과가 있다.As described above, according to the present invention, the beam is emitted toward the focusing lens in a state in which the diameter of the beam is adjusted by the scattering unit of the beam adjusting means. Therefore, when the inner diameter of the small diameter beam is emitted toward the focusing lens, the focal length becomes shorter, and when the large diameter outer beam is emitted, the focal length becomes shorter, so that information of discs having different thicknesses can be reproduced. There is no need to do this has the effect of improving productivity.
Claims (3)
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| KR1019970026256A KR19990002601A (en) | 1997-06-20 | 1997-06-20 | Gwangju Yarn Equipment |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| KR1019970026256A KR19990002601A (en) | 1997-06-20 | 1997-06-20 | Gwangju Yarn Equipment |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| KR19990002601A true KR19990002601A (en) | 1999-01-15 |
Family
ID=65986460
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| KR1019970026256A KR19990002601A (en) | 1997-06-20 | 1997-06-20 | Gwangju Yarn Equipment |
Country Status (1)
| Country | Link |
|---|---|
| KR (1) | KR19990002601A (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US8411366B2 (en) | 2010-11-19 | 2013-04-02 | Samsung Electronics Co., Ltd. | Optical probe and optical system therefor |
-
1997
- 1997-06-20 KR KR1019970026256A patent/KR19990002601A/en not_active Application Discontinuation
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US8411366B2 (en) | 2010-11-19 | 2013-04-02 | Samsung Electronics Co., Ltd. | Optical probe and optical system therefor |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| US5822135A (en) | Lens device including a light controlling mechanism and an optical pickup apparatus using a lens device | |
| CA2202288C (en) | Lens device and an optical pickup apparatus using the lens device | |
| MY115096A (en) | Optical pickup | |
| EP0372365B1 (en) | Optical pickup apparatus | |
| US4376303A (en) | Quasi-zoom lens optical focus sensor | |
| KR100458038B1 (en) | Optical head | |
| KR100294235B1 (en) | Optical pickup using optical variable iris | |
| KR0176595B1 (en) | Objective lens device and optic pick-up device using objective lens device | |
| KR100200873B1 (en) | Optical pickup device | |
| MY119511A (en) | Optical pickup using an optical phase plate | |
| US6345029B1 (en) | Optical pickup apparatus and method | |
| KR19990002601A (en) | Gwangju Yarn Equipment | |
| TW347476B (en) | Light pickup | |
| KR970012379A (en) | Dual Focus Optical Pickup | |
| US5751679A (en) | Hologram formed on an objective lens for one defracting light beams which are separated by more than one track width | |
| JP2641905B2 (en) | Optical head device | |
| JP3503995B2 (en) | Optical disk drive | |
| KR960005480A (en) | Focus error detection device | |
| JP2765402B2 (en) | Optical head device | |
| JPS62241142A (en) | Optical detection head | |
| KR20020062428A (en) | Method for controlling photo detector balance | |
| KR930009680B1 (en) | Optical writing & recording device | |
| JP2000020992A (en) | Optical head and optical disk device using the same | |
| KR100423853B1 (en) | Optical Disc Player | |
| JPS63175236A (en) | Optical head device |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| WITN | Withdrawal due to no request for examination |