KR940007811Y1 - Laser scanning device - Google Patents
Laser scanning device Download PDFInfo
- Publication number
- KR940007811Y1 KR940007811Y1 KR2019890007696U KR890007696U KR940007811Y1 KR 940007811 Y1 KR940007811 Y1 KR 940007811Y1 KR 2019890007696 U KR2019890007696 U KR 2019890007696U KR 890007696 U KR890007696 U KR 890007696U KR 940007811 Y1 KR940007811 Y1 KR 940007811Y1
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- South Korea
- Prior art keywords
- light source
- optical axis
- mirror
- scanning
- rotating
- Prior art date
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Classifications
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- G—PHYSICS
- G03—PHOTOGRAPHY; CINEMATOGRAPHY; ANALOGOUS TECHNIQUES USING WAVES OTHER THAN OPTICAL WAVES; ELECTROGRAPHY; HOLOGRAPHY
- G03G—ELECTROGRAPHY; ELECTROPHOTOGRAPHY; MAGNETOGRAPHY
- G03G15/00—Apparatus for electrographic processes using a charge pattern
- G03G15/04—Apparatus for electrographic processes using a charge pattern for exposing, i.e. imagewise exposure by optically projecting the original image on a photoconductive recording material
- G03G15/04036—Details of illuminating systems, e.g. lamps, reflectors
- G03G15/04045—Details of illuminating systems, e.g. lamps, reflectors for exposing image information provided otherwise than by directly projecting the original image onto the photoconductive recording material, e.g. digital copiers
- G03G15/04072—Details of illuminating systems, e.g. lamps, reflectors for exposing image information provided otherwise than by directly projecting the original image onto the photoconductive recording material, e.g. digital copiers by laser
-
- G—PHYSICS
- G02—OPTICS
- G02B—OPTICAL ELEMENTS, SYSTEMS OR APPARATUS
- G02B26/00—Optical devices or arrangements for the control of light using movable or deformable optical elements
- G02B26/08—Optical devices or arrangements for the control of light using movable or deformable optical elements for controlling the direction of light
- G02B26/10—Scanning systems
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- Physics & Mathematics (AREA)
- Optics & Photonics (AREA)
- General Physics & Mathematics (AREA)
- Facsimile Scanning Arrangements (AREA)
Abstract
내용 없음.No content.
Description
제 1 도는 본 고안에 의한 광주사장치의 개략 구성도.1 is a schematic configuration diagram of a light scanning apparatus according to the present invention.
제 2a, b 도는 종래의 광주사장치를 예시한 개략설명도.2a, b is a schematic explanatory diagram illustrating a conventional Gwangju presidential value.
* 도면의 주요부분에 대한 부호의 설명* Explanation of symbols for main parts of the drawings
1 : 광원부 2 : 광축1 light source 2 optical axis
3 : 결상광학계 4 : 회전다면경3: imaging optical system 4: rotating face mirror
5 : 반사경 6 : 감광드럼5: reflector 6: photosensitive drum
본 고안은 레이저프린터, PPC, 팩시밀리, 디지탈복사기등에 있어서, 회전다면경을 이용한 광주사장치에 관한 것으로 특히 광원부와 결상면을 수직인 방향으로 상호 배치하여 입사광원부와 광축과의 주사각도를 최소화하여 회전다면경의 체적을 축소함과 동시에 광주사장치의 소형화를 구현할 수 있도록 한 것이다.The present invention relates to a laser scanner, a PPC, a facsimile machine, a digital copying machine, and a optical scanning device using a rotating multifacet mirror. It is to reduce the volume of the rotating multi-faceted mirror and to miniaturize the optical scanning device.
최근 레이저를 이용한 OA기기개발이 급속하게 발전되고 있으며 레이저프린터, PPC, 팩시밀리 디지탈 복사기등 회전다면경을 이용한 레이저 주사광학계는 주사폭, 인자속도, 소형화등을 고려하여 가능한 회전다면경이 작은 것을 채용하는 것이 바람직하다.Recently, the development of OA equipment using laser has been rapidly developed, and the laser scanning optical system using the rotating multifaceted mirror such as laser printer, PPC, and facsimile digital copier has adopted the smallest possible rotating multifaceted mirror in consideration of scan width, printing speed, and miniaturization. It is preferable.
이를 위해서는 회전다면경과 광축의 옵셋 및 광원과 광축의 각도를 적절히 조절함으로서 최대의 주사효율을 얻을 수 있다.For this purpose, the maximum scanning efficiency can be obtained by appropriately adjusting the rotational polygon mirror and the offset of the optical axis and the angle of the light source and the optical axis.
특히 광원과 광축의 각도는 작을수록 소형의 회전다면경으로 같은 주사폭의 주사가 가능한데 종래의 경우에는 광축과의 입사각을 작게 하려면 결상 광학계에 의해 차단되거나 그 한계가 제한되어 왔다.In particular, as the angle between the light source and the optical axis becomes smaller, scanning of the same scanning width is possible with a smaller rotating polyhedron, but in the related art, in order to reduce the incident angle with the optical axis, it has been blocked by the imaging optical system or its limit has been limited.
이러한 종래의 광주사장치는 제 2 도에서와 같이 광원부(11)가 광축(12)과 동일평면상에 존재하고 결상광학계(14)에 의해 입사광원이 차단되지 않는 최소각 θ로 광원과 광축의 각도를 결정하거나 또는 결상광학계(14)의 무효주사폭에 해당하는 일부를 통과하여 비임을 입사하는 방식을 취하고 있으므로 광원부(11)로 부터 회전다면경(13)에 입사하는 주사평면과 이 주사평면에 반사되어 결상면에 도달하는 평면이 서로 상이하여 다면경 끝부분의 다중반사에 의한 화상결함이 생기고 동일 평면상의 광원부(11)와 결상면(15)으로 인해 수평수차가 커지는 한편 회전다면경(13)의 소형화가 불가능하여 이를 구동시키는 드라이브 모우터의 부하가 증가되어 고속 인자가 어려운 문제점이 있었다.This conventional photonic optical device is the angle between the light source and the optical axis at a minimum angle θ where the light source unit 11 is coplanar with the optical axis 12 and the incident light source is not blocked by the imaging optical system 14 as shown in FIG. Or the beam is incident through a portion corresponding to the invalid scanning width of the imaging optical system 14, so that the scanning plane incident on the rotating plane mirror 13 from the light source unit 11 and the scanning plane The planes that are reflected and reach the image plane are different from each other, resulting in an image defect due to multiple reflections at the end of the multi-facet mirror, and the horizontal aberration increases due to the light source part 11 and the image plane 15 on the same plane, while increasing the horizontal aberration (13). Since it is impossible to miniaturize), the load of the drive motor for driving the drive is increased, which makes it difficult to print at high speed.
따라서 이러한 종래의 문제를 해결하기 위하여 본 고안은 결상면의 임의의 축과 수직인 방향으로 입사광원부를 배치하여 주사각도를 0으로 설계함으로써 소형의 회전다면경을 이용한 광학 설계를 구현할 수 있는 것을 특징으로 한다.Therefore, in order to solve such a conventional problem, the present invention can implement an optical design using a small rotating faceted mirror by arranging an incident light source in a direction perpendicular to an axis of an imaging plane and designing a scanning angle of zero. It is done.
이하에서 본 고안의 실시예를 설명한다.Hereinafter, an embodiment of the present invention will be described.
제 1 도는 본 고안에 의한 주사광학계의 개략구성도로서 광원부(1)는 광축(2)과 수직인 방향으로 결상 평면상에 배치되어 회전다면경(4)의 소형화를 달성하기 위한 광원부(1)와 광축(2)과의 주사각도가 0인 상태이다.1 is a schematic configuration diagram of a scanning optical system according to the present invention, wherein the light source unit 1 is disposed on an image plane in a direction perpendicular to the optical axis 2 to achieve miniaturization of the rotating multifaceted mirror 4. And the scanning angle with the optical axis 2 is zero.
입사광원(1a)은 결상광학계(3)를 통하여 회전다면경(4)에 도달한 후 광축(2)의 아래 방향으로 반사하여 다시 결상광학계(3)를 통과하면서 반사경(5)에 의해 감광드럼의 결상면(6)에 주사하게 된다.After the incident light source 1a reaches the rotating polygon mirror 4 through the imaging optical system 3, it is reflected downward of the optical axis 2 and passes again through the imaging optical system 3, and is then subjected to the photosensitive drum by the reflecting mirror 5. It is scanned on the imaging surface 6 of.
즉 광축(2)에 수직인 결상평면상의 한점에 광원부(1)를 설치하여 광원부(1)로 부터 입사된 빔은 결상광학계(3)를 통과하여 회전다면경(4)에 도달하고 광축(2)과 대칭으로 반사되어 결상광학계(3)를 지나 광주사장치 끝부분에 장착된 반사경(5)에 의해 감광드럼의 결상면(6)에 도달하게 되며 회전다면경(4)의 회전에 따라 감광드럼의 결상면(6)을 주사하게 된다.That is, by installing the light source unit 1 at a point on an image plane perpendicular to the optical axis 2, the beam incident from the light source unit 1 passes through the imaging optical system 3 to reach the rotating mirror mirror 4 and the optical axis 2 ) Is reflected symmetrically and passes through the imaging optical system (3) to reach the imaging surface (6) of the photosensitive drum by a reflector (5) mounted at the end of the optical scanning device, and the photosensitive light is rotated according to the rotation of the rotating mirror (4). The imaging surface 6 of the drum is scanned.
그러나 감광드럼의 결상면(6)에서 결상되는 주사선은 광축(2)보다 하단에 있게되며 이 주사선은 원호를 그리게 되나 광원부(1)의 위치를 광축(2)으로 부터 적당한 거리로 선정하면 어느정도 직선이 되는 것이다.However, the scanning line formed on the imaging surface 6 of the photosensitive drum is lower than the optical axis 2, and the scanning line draws an arc. However, if the position of the light source unit 1 is selected at an appropriate distance from the optical axis 2, It will be.
이상과 같이 본 고안은 입사광원부와 광축과의 각도를 최소화함으로써 회전다면경의 크기를 축소할 수 있고 수직평면상에 위치한 광원부와 결상면에 의해 다중반사를 극소화하여 화상결함이 한층 감소됨과 동시에 광이 도달하는 곳이 렌즈중심부이므로 수차가 적어진다.As described above, the present invention can reduce the size of the rotating polyhedron by minimizing the angle between the incident light source part and the optical axis. The aberration is reduced because it reaches the center of the lens.
또한 회전다면경의 크기 감소로 가격 절감과 광주사장치의 소형화가 가능하고 회전다면경의 모터부하가 감소되어 고속 프린터에 유리한 장점이 있는 것이다.In addition, it is possible to reduce the size and size of the optical scanning device by reducing the size of the rotating multi-faceted mirror, and to reduce the motor load of the rotating multi-faceted mirror, which is advantageous in high speed printers.
Claims (1)
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| KR2019890007696U KR940007811Y1 (en) | 1989-06-01 | 1989-06-01 | Laser scanning device |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| KR2019890007696U KR940007811Y1 (en) | 1989-06-01 | 1989-06-01 | Laser scanning device |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| KR900020834U KR900020834U (en) | 1990-12-14 |
| KR940007811Y1 true KR940007811Y1 (en) | 1994-10-24 |
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ID=19286807
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| KR2019890007696U KR940007811Y1 (en) | 1989-06-01 | 1989-06-01 | Laser scanning device |
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| Country | Link |
|---|---|
| KR (1) | KR940007811Y1 (en) |
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1989
- 1989-06-01 KR KR2019890007696U patent/KR940007811Y1/en not_active IP Right Cessation
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| Publication number | Publication date |
|---|---|
| KR900020834U (en) | 1990-12-14 |
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