KR0129725Y1 - Scanning optical apparatus of laser beam printer - Google Patents
Scanning optical apparatus of laser beam printer Download PDFInfo
- Publication number
- KR0129725Y1 KR0129725Y1 KR2019950047686U KR19950047686U KR0129725Y1 KR 0129725 Y1 KR0129725 Y1 KR 0129725Y1 KR 2019950047686 U KR2019950047686 U KR 2019950047686U KR 19950047686 U KR19950047686 U KR 19950047686U KR 0129725 Y1 KR0129725 Y1 KR 0129725Y1
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- South Korea
- Prior art keywords
- scanning optical
- scanning
- laser beam
- beam printer
- line sensor
- Prior art date
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Classifications
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B41—PRINTING; LINING MACHINES; TYPEWRITERS; STAMPS
- B41J—TYPEWRITERS; SELECTIVE PRINTING MECHANISMS, i.e. MECHANISMS PRINTING OTHERWISE THAN FROM A FORME; CORRECTION OF TYPOGRAPHICAL ERRORS
- B41J2/00—Typewriters or selective printing mechanisms characterised by the printing or marking process for which they are designed
- B41J2/435—Typewriters or selective printing mechanisms characterised by the printing or marking process for which they are designed characterised by selective application of radiation to a printing material or impression-transfer material
- B41J2/47—Typewriters or selective printing mechanisms characterised by the printing or marking process for which they are designed characterised by selective application of radiation to a printing material or impression-transfer material using the combination of scanning and modulation of light
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B41—PRINTING; LINING MACHINES; TYPEWRITERS; STAMPS
- B41J—TYPEWRITERS; SELECTIVE PRINTING MECHANISMS, i.e. MECHANISMS PRINTING OTHERWISE THAN FROM A FORME; CORRECTION OF TYPOGRAPHICAL ERRORS
- B41J2/00—Typewriters or selective printing mechanisms characterised by the printing or marking process for which they are designed
- B41J2/435—Typewriters or selective printing mechanisms characterised by the printing or marking process for which they are designed characterised by selective application of radiation to a printing material or impression-transfer material
- B41J2/447—Typewriters or selective printing mechanisms characterised by the printing or marking process for which they are designed characterised by selective application of radiation to a printing material or impression-transfer material using arrays of radiation sources
- B41J2/45—Typewriters or selective printing mechanisms characterised by the printing or marking process for which they are designed characterised by selective application of radiation to a printing material or impression-transfer material using arrays of radiation sources using light-emitting diode [LED] or laser arrays
Landscapes
- Mechanical Optical Scanning Systems (AREA)
- Facsimile Scanning Arrangements (AREA)
Abstract
본 고안은 칼라 레이저 빔 프린터의 주사 광학장치에 관한 것이다.The present invention relates to a scanning optics of a color laser beam printer.
복수개의 동일 파장을 가지는 광원을 이용하는 칼라 레이저 빔 프린터용 LSU에 있어서, 각각의 광원들이 주사 광학장치와 폴리곤 미러를 통해 화소를 주사시에 복수개의 광원이 폴리곤 미러에 수직한 방향으로 등간격으로 입사 및 반사되어 1라인 주사마다 수직 동기호신호들을 1개의 CCD 라인센서로 얻도록 구성된다.In a LSU for a color laser beam printer using a plurality of light sources having the same wavelength, a plurality of light sources are incident at equal intervals in a direction perpendicular to the polygon mirror when scanning the pixels through the scanning optical device and the polygon mirror. And reflected to obtain the vertical sync signal with one CCD line sensor per one line scan.
이에 따라, 복수개의 미러와 디텍트 렌즈 및 포토 다이오드가 필요없게 되어 LSU의 내부구조 및 광로설계를 단순화시키게 되는 효과가 있다.Accordingly, there is no need for a plurality of mirrors, a detection lens, and a photo diode, thereby simplifying the internal structure and the optical path design of the LSU.
Description
제1도는 종래의 주사 광학장치를 설명하기 위한 구성도.1 is a block diagram for explaining a conventional scanning optical device.
제2도는 본 고안에 따른 주사 광학장치의 구성도.2 is a block diagram of a scanning optical device according to the present invention.
제3도는 제2도에서 발췌한 라인센서의 상세도이다.3 is a detailed view of the line sensor taken from FIG.
* 도면의 주요부분에 대한 부호의 설명* Explanation of symbols for main parts of the drawings
1 : 레이저 다이오드 2 : 콜레메이팅 렌즈1 laser diode 2 collimating lens
3 : 실린드리컬 렌즈 4 : 플리곤 미러3: cylindrical lens 4: plygon mirror
5 : 포커스 렌즈 6 : 미러5: focus lens 6: mirror
7 : 포토컨덕티브 드럼 8 : 포토 다이오드7: photoconductive drum 8: photodiode
9 : 디텍트 렌즈 10 : (반사)미러9: detect lens 10: (reflection) mirror
20 : CCD 라인센서20: CCD line sensor
본 고안은 칼라 레이저 빔 프린터용 주사 광학장치 즉, 레이저 스캔닝 유니트(LSU, Laser Scannig Unit)에 관한 것으로, 보다 상세하게는 각각의 광원들이 주사 광학장치와 폴리곤 미러를 통해 화소를 주사시에 복수개의 광원이 폴리곤 미러에 수직한 방향으로 등간격으로 입사 및 반사되어 1라인 주사마다 수식 동기신호들을 1개의 CCD 라인센서로 얻도록 함으로써 주사 광학장치의 내부구조 및 광로설계를 단순화시킬 수 있는 레이저 빔 프린터의 주사 광학장치에 관한 것이다.The present invention relates to a scanning optical device for a color laser beam printer, that is, a laser scanning unit (LSU). More specifically, each light source scans a plurality of pixels when scanning a pixel through the scanning optical device and a polygon mirror. Laser beams that can simplify the internal structure and optical path design of the scanning optics by allowing three light sources to be incident and reflected at equal intervals in the direction perpendicular to the polygon mirror so as to obtain modified synchronization signals with one CCD line sensor per line scan A scanning optical device for a printer.
레이저 빔 프린터(LBP)의 광학계는 회전하는 다면경과, 상기 다면경에 조사할 레이저 광을 발생하는 레이저 다이오드, 레이저 다이오드에서 다면경에 조사되어 반사되는 레이저 광에 의하여 화상을 프린트할 회전하는 드럼, 상기 다면경에서 레이저 광을 검출하는 빔 검출기(Beam Detector)로 이루어진다.The optical system of the laser beam printer LBP includes a rotating multifaceted mirror, a laser diode generating laser light to be irradiated to the multifaceted mirror, a rotating drum to print an image by laser light irradiated and reflected from the multifaceted mirror from the laser diode, It consists of a beam detector (Beam Detector) for detecting the laser light in the multi-faceted mirror.
이러한 광학계에서 레이저 다이오드의 레이저 광은 다면경에 반사되어 드럼에 노광되고, 매 스캔(Scan) 라인마다 그 시작점을 알리는 포인트를 빔 검출기를 통해 얻고 있다.In such an optical system, the laser light of the laser diode is reflected by a multi-facet mirror and exposed to a drum, and a point indicating the start point of each scan line is obtained through a beam detector.
이러한 주사 광학장치를 제1도에 의거 간략히 설명한다.This scanning optical device will be briefly described based on FIG.
제1도에 따르면, 주사 광학장치는 복수개의 레이저 다이오드(Laser Diode)(1), 복수개의 콜리메인팅 렌즈(Collimating Lens)(2), 복수개의 실린드리컬 렌즈(Cylindrical Lens)(3), 폴리곤 미러(Polygon Mirror)(4), 포커스 렌즈(5), 반사미러(Mirror)(6),(10), 복수개의 포토컨덕티브 드럼(Photoconductive Drum)(7), 복수개의 포토 다이오드(Photo Diode)(8) 및 복수개의 디텍트 렌즈(Detect Lens)(9)를 포함한다.According to FIG. 1, the scanning optical device includes a plurality of laser diodes 1, a plurality of collimating lenses 2, a plurality of cylindrical lenses 3, Polygon Mirror (4), Focus Lens (5), Reflector (Mirror) (6), (10), A plurality of Photoconductive Drums (7), A plurality of Photo Diodes 8 and a plurality of Detect Lenses 9.
이러한 구성에 따라, 복수개의 레이저 다이오드(1)에서 나오는 광원을 콜리메이팅 렌즈(2)와 실린드리컬 렌즈(3)를 통해 집광되어서 폴리곤 미러(4)에 수직한 방향으로 반사시켜 포커스 렌즈(5)를 거쳐 미러(6)에 반사되고, 각각의 광원들은 복수개의 포토컨덕티브 드럼(7)에 1라인씩 주사한 후 복수개의 미러(10)와 디텍트 렌즈(9) 및 포토 다이오드(8)를 통해 복수개의 광원의 화소에 대한 수직 동기신호(HSYNC)를 얻게 되는 것이다.According to this configuration, the light sources emitted from the plurality of laser diodes 1 are collected through the collimating lens 2 and the cylindrical lens 3 and reflected in a direction perpendicular to the polygon mirror 4 so as to focus the lens 5. Reflected by the mirror 6, and each light source is scanned one line to the plurality of photoconductive drums 7 and then the plurality of mirrors 10, the detection lens 9 and the photodiode 8 Through the vertical synchronization signal (HSYNC) for the pixels of the plurality of light sources are obtained.
그러나, 이러한 주사 광학장치는 수직 동기신호(HSYNC)를 검출시 복수개의 포토 다이오드와 복수개의 디텍트 렌즈가 필요하며, 복수개의 광원에 대한 각각의 수광로 설계로 LSU의 내부구조가 복잡해지는 문제점을 안게 된다.However, such a scanning optical device requires a plurality of photodiodes and a plurality of detector lenses when detecting the vertical synchronizing signal (HSYNC), and the internal structure of the LSU is complicated by the design of each light receiving path for the plurality of light sources. It is embraced.
본 고안의 목적은 상술한 종래의 주사 광학장치의 구성이 안게되는 제반 문제점을 해결하기 위한 것으로, 복수개의 미러와 디텍트 렌즈 및 포토 다이오드를 필요없게 함으로써 LSU의 내부구조 및 광로설계의 단순화를 가능하게 한 레이저 빔 프린터의 주사광학장치를 제공하는 것이다.An object of the present invention is to solve the above-mentioned problems in the configuration of the conventional scanning optical apparatus described above, and it is possible to simplify the internal structure and optical path design of the LSU by eliminating the need for a plurality of mirrors, a detection lens and a photodiode. It is to provide a scanning optical device of a laser beam printer.
본 고안의 상기 목적을 달성하기 위해 본 고안은 복수개의 광원을 가지는 LSU에서 라인센서(Line Sensor)를 사용하여 각 광원들에 대한 수직 동기신호(HSYNC)들을 검출하게 한 것을 특징으로 한다.In order to achieve the above object of the present invention, the present invention is characterized in that it detects the vertical synchronization signals (HSYNC) for each light source using a line sensor (Line Sensor) in the LSU having a plurality of light sources.
이러한 특징에 따라, 각각의 광원들이 주사 광학장치와 폴리곤 미러를 통해 화소를 주사시에 복수개의 광원이 폴리곤 미러에 수직한 방향으로 등간격으로 입사 및 반사되어 1라인 주사마다 수직동기신호들을 1개의 CCD 라인센서로 얻게 되는 것이다.According to this feature, when each light source scans a pixel through the scanning optics and the polygon mirror, a plurality of light sources are incident and reflected at equal intervals in the direction perpendicular to the polygon mirror to generate one vertical synchronization signal per line scan. You get it with a CCD line sensor.
이하, 첨부된 도면을 참조하여 본 고안의 바람직한 실시예를 상술한다.Hereinafter, with reference to the accompanying drawings will be described a preferred embodiment of the present invention.
제2도에 따르면, 본 고안에 따른 주사 광학장치는 복수개의 레이저 다이오드(10), 복수개의 콜리메이팅 렌즈(2), 복수개의 실린드리컬 렌즈(3), 폴리곤 미러(4), 포커스 렌즈(5), 미러(6), 복수개의 포토컨덕티브 드럼(7) 및 CCD 라인센서(20)를 포함한다.According to FIG. 2, the scanning optical apparatus according to the present invention includes a plurality of laser diodes 10, a plurality of collimating lenses 2, a plurality of cylindrical lenses 3, a polygon mirror 4, and a focus lens ( 5), a mirror 6, a plurality of photoconductive drums 7 and a CCD line sensor 20.
이러한 구성에 따라, 복수개의 광원인 레이저 다이오드(1)에서 나오는 빔이 콜리메이팅 렌즈(2)와 실린드리컬 렌즈(2)를 거쳐 폴리곤 미러(4)에 수직한 방향으로 등간격을 이루며 반사되어, 포커스 렌즈(5) 및 미러(6)를 거쳐 포토컨덕티브 드럼(7)에 1라인을 주사한 후 CCD 라인센서(20)에 입사되어 각각의 광원들의 수직동기신호(HSYNC)들을 얻게 되는 것이다.According to this configuration, the beams emitted from the laser diode 1, which are a plurality of light sources, are reflected at equal intervals in the direction perpendicular to the polygon mirror 4 via the collimating lens 2 and the cylindrical lens 2, and are reflected. After scanning one line to the photoconductive drum 7 via the focus lens 5 and the mirror 6, the light is incident on the CCD line sensor 20 to obtain vertical synchronization signals HSYNC of the respective light sources. .
이상에서 설명한 바와 같이, 본 고안에 따른 레이저 빔 프린터의 주사 광학장치는 복수개의 광원이 주사 광학계와 폴리곤 미러 및 포커스 렌즈를 통해 각각의 화소신호에 대한 1라인 주사때 복수개의 수직 동기신호를 얻기 위해 디텍트 렌즈와 포토 다이오드 대신 CCD 라인센서를 이용함으로써 LSU의 내부구조 및 광로설계를 단순화시킬 수 있게 되는 효과가 있다.As described above, in the scanning optical apparatus of the laser beam printer according to the present invention, a plurality of light sources are used to obtain a plurality of vertical synchronizing signals when scanning a single line for each pixel signal through a scanning optical system, a polygon mirror, and a focus lens. By using CCD line sensors instead of detector lenses and photodiodes, the internal structure and optical path design of the LSU can be simplified.
Claims (3)
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| KR2019950047686U KR0129725Y1 (en) | 1995-12-26 | 1995-12-26 | Scanning optical apparatus of laser beam printer |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| KR2019950047686U KR0129725Y1 (en) | 1995-12-26 | 1995-12-26 | Scanning optical apparatus of laser beam printer |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| KR970028157U KR970028157U (en) | 1997-07-24 |
| KR0129725Y1 true KR0129725Y1 (en) | 1999-03-30 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| KR2019950047686U KR0129725Y1 (en) | 1995-12-26 | 1995-12-26 | Scanning optical apparatus of laser beam printer |
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| Country | Link |
|---|---|
| KR (1) | KR0129725Y1 (en) |
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1995
- 1995-12-26 KR KR2019950047686U patent/KR0129725Y1/en not_active IP Right Cessation
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| Publication number | Publication date |
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| KR970028157U (en) | 1997-07-24 |
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