KR900003380Y1 - Optical system of laser scanner - Google Patents
Optical system of laser scanner Download PDFInfo
- Publication number
- KR900003380Y1 KR900003380Y1 KR2019870018793U KR870018793U KR900003380Y1 KR 900003380 Y1 KR900003380 Y1 KR 900003380Y1 KR 2019870018793 U KR2019870018793 U KR 2019870018793U KR 870018793 U KR870018793 U KR 870018793U KR 900003380 Y1 KR900003380 Y1 KR 900003380Y1
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- South Korea
- Prior art keywords
- lens
- optical system
- fixed
- laser
- holder
- Prior art date
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Classifications
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- 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
- G02B26/105—Scanning systems with one or more pivoting mirrors or galvano-mirrors
-
- G—PHYSICS
- G02—OPTICS
- G02B—OPTICAL ELEMENTS, SYSTEMS OR APPARATUS
- G02B19/00—Condensers, e.g. light collectors or similar non-imaging optics
- G02B19/0033—Condensers, e.g. light collectors or similar non-imaging optics characterised by the use
- G02B19/0047—Condensers, e.g. light collectors or similar non-imaging optics characterised by the use for use with a light source
- G02B19/0052—Condensers, e.g. light collectors or similar non-imaging optics characterised by the use for use with a light source the light source comprising a laser diode
- G02B19/0057—Condensers, e.g. light collectors or similar non-imaging optics characterised by the use for use with a light source the light source comprising a laser diode in the form of a laser diode array, e.g. laser diode bar
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- 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
- G02B26/12—Scanning systems using multifaceted mirrors
- G02B26/121—Mechanical drive devices for polygonal mirrors
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- Physics & Mathematics (AREA)
- General Physics & Mathematics (AREA)
- Optics & Photonics (AREA)
- Facsimile Scanning Arrangements (AREA)
Abstract
내용 없음.No content.
Description
제1도는 종래 광학계의 구성을 보인 사시도.1 is a perspective view showing the configuration of a conventional optical system.
제2도는 본 고안 광학계의 구성을 보인 단면도.2 is a cross-sectional view showing the configuration of the optical system of the present invention.
제3도는 본 고안 광학계의 작용을 설명하기 위한 평면도.3 is a plan view for explaining the operation of the optical system of the present invention.
*도면의 주요부분에 대한 부호의 설명* Explanation of symbols for main parts of the drawings
1 : 고정대 2 : 회전대1: Fixture 2: Swivel
2a : 수평부 2b : 수직부2a: horizontal part 2b: vertical part
3 : 코일 5 : 트랜스포머3: coil 5: transformer
4 : 레이저다이오드 6 : 광결합소자4 laser diode 6 optical coupling element
6a : 방광다이오드 6a : 발광다이오드6a: light emitting diode 6a: light emitting diode
6b : 포토다이드 7 : 렌즈홀더6b: Photodide 7: Lens Holder
7a : 지지편 8 : 렌즈7a: support piece 8: lens
본 고안은 레이저 프린터에 관한 것으로, 특히 레이저 스캐너(laser scanner)의 광학계에 관한 것이다.The present invention relates to a laser printer, and more particularly to an optical system of a laser scanner (laser scanner).
종래 레이저 프린터에 있어서는 레이저 다이오드(11)에서 나온 레이저빔을 클리메터 렌즈(12)을 통하여 평행한 빔으로 만들고 회전다면경(13)에 입사시킨다. 입사된 빔은 회전다면경(13)이 회전함에 따라 편향되고 보정렌즈(f-0렌즈) (14)를 통과한 후 드럼(15)에 전속되도록 되어있다. 도면중 16은 스캐너 제어부를 보는 것이다. 그러나, 이와같은 종래 레이져 스캐너의 광학계를 많은 렌즈와 회전다면경이 사용되어 제품의 원가가 증대되고 배열설치가 어려운 결함이 있었다.In the conventional laser printer, the laser beam emitted from the laser diode 11 is made into a parallel beam through the lens lens 12 and is incident on the rotating polyscopy 13. The incident beam is deflected as the rotating mirror mirror 13 rotates and passes through the correcting lens (f-0 lens) 14 to be transferred to the drum 15. 16 shows a scanner control unit. However, the optical system of such a conventional laser scanner has been used a lot of lenses and a rotating face mirror, so that the cost of the product is increased and the arrangement is difficult to install.
본 고안은 상기한 바와같은 종래의 결함을 해소하기 위하여 안출한 것으로, 회전대에 고정된 레이져 다이오드가 렌즈홀더에 고정된 렌즈의 절점을 중심으로 하여 회전하게 하고 시그널은 회전축 상의 광결합소자에 의해 전달되게 하여 종래의 광학계에 비하여 제작원가가 저렴하게 되는 레이저 스캐너의 광학계를 제공하기 위한 것이다.The present invention has been devised to solve the conventional defects as described above. The laser diode fixed to the rotating table rotates around the node of the lens fixed to the lens holder, and the signal is transmitted by the optical coupling element on the rotating shaft. The present invention is to provide an optical system of a laser scanner, which is less expensive to manufacture than conventional optical systems.
이하, 이와같은 본 고안을 첨부한 도면에 의하여 상세히 설명하면 다음과 같다.Hereinafter, described in detail by the accompanying drawings of the present invention as follows.
제2도는 및 제3도에 도시한 바와같이, 기기 내부의 베이스 플레이트(도시되지 않음)에 고정된 고정대(1)에 회전대(2)가 회전가능하게 결합되어 있고, 고정대(1)와 회전대(2)에는 유도 전류가 유기되어 회전대(2)를 회전토록 하는 코일(3)이 감겨져 있으며, 회전대(2)의 수직부(b)오 수평부(2a)에는 레이저 다이오드(4)와 트랜스포머(5)가 설치되어 있다. 또한 회전대(2)와 고정대(1)에는 광결합소자(opto coupler)(6)가 설치되어 있다.2 and 3, a swivel 2 is rotatably coupled to a swivel 1 fixed to a base plate (not shown) inside the device, and the swivel 1 and the swivel ( 2) a coil 3 is wound around the rotating table 2 to induce induced current, and the laser diode 4 and the transformer 5 are located on the vertical section b and the horizontal section 2a of the rotating table 2. ) Is installed. In addition, an opto coupler 6 is provided on the rotating table 2 and the fixing table 1.
광결합 소자(6)의 발광다이오드(6a)와 포토다이오드(66)는 고정대(1)와 회전대(2)에 각각 설치되어 있다.The light emitting diode 6a and the photodiode 66 of the optical coupling element 6 are provided on the fixing table 1 and the rotating table 2, respectively.
그리고, 베이스 플레이드 상에 고정된 렌즈 홀더(7)의 지지편(7a)에는 렌즈(8)가 고정되어 있다. 도면에서 9는 드럼을 보인 것이다.The lens 8 is fixed to the support piece 7a of the lens holder 7 fixed on the base plate. 9 shows the drum.
이와같은 본 고안은 레이져 다이오드(4)에서 나온 레이저 빔이 렌즈(8)의 절점을 통과하도록 레이저 다이오드(4)가 렌즈(8)의 절점을 기준으로 하여 회전한다.The present invention as described above rotates the laser diode 4 with respect to the node 8 of the lens 8 so that the laser beam from the laser diode 4 passes through the node 8.
이때 레이저 다이오드(4)의 발광점이 옵젝트 포인트(object point)가 되고 드럼(9)면이 이미지 포인트(image point)가 된다. 물체측 절점에 광축과 0로 입사한 레이저빔은 상측절점에서 광축과 0로 진행하기 때문에 레이저 다이오드(4)가 회전함에 따라 드럼(9)면에서 회전각(θ)에 직선으로 진행한다.At this time, the light emitting point of the laser diode 4 becomes an object point and the surface of the drum 9 becomes an image point. Since the laser beam incident on the object side node with the optical axis and zero travels with the optical axis at the upper node, the laser beam travels in a straight line at the rotation angle θ on the drum 9 surface as the laser diode 4 rotates.
레이저 다이오드(4)를 구동시키는 전원은 회전대(2)에 감긴 코일(3)과 고정대(1)에 감긴 코일(3)과의 유도전류에 의해서 얻어진다.The power source for driving the laser diode 4 is obtained by the induced current between the coil 3 wound on the swivel table 2 and the coil 3 wound on the stator table 1.
즉, 회전대(2)와 고정대(1)에 감긴 코일(3)은 회전대(2)가 회전하더라도 동일한 기하학적 구조를 갖는다.That is, the coil 3 wound around the swivel table 2 and the fixed table 1 has the same geometry even if the swivel table 2 rotates.
이때 고정대(1)에 감긴 코일(3)에 교류전류를 인가하면 회전대(2)에 감긴 코일(3)에 유도전류가 유기되어 회전대(2)위에 설치된 레이저 다이오드(4)를 구동시킬 수 있다. 시그널은 광결합소자(6)로 전달하는데, 고정대(1)에 장치된 발광다이오드(6a)에 온, 오프 시그널을 인가하면 회전대(2)에 장치된 포토다이오드(6b)에 전류가 온, 오프되어 시그널의 전송이 이루어진다.At this time, when an alternating current is applied to the coil 3 wound on the stator 1, an induced current is induced in the coil 3 wound on the swivel 2 to drive the laser diode 4 installed on the swivel 2. The signal is transmitted to the optical coupling element 6, and when an on / off signal is applied to the light emitting diode 6a mounted on the fixed base 1, the current is turned on or off to the photodiode 6b mounted on the rotating table 2. Signal is transmitted.
상술한 바와같은 본 고안은 고가의 회전다면경 및 다수개의 렌즈를 사용하는 종래의 광학계에 비하여 제작원가가 감소되어 저렴한 가격의 레지어 프린터를 제공하게되는 이점이 있다.The present invention as described above has the advantage that the manufacturing cost is reduced compared to the conventional optical system using an expensive rotating multi-face mirror and a plurality of lenses to provide a low-cost leisure printer.
Claims (1)
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| KR2019870018793U KR900003380Y1 (en) | 1987-10-31 | 1987-10-31 | Optical system of laser scanner |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| KR2019870018793U KR900003380Y1 (en) | 1987-10-31 | 1987-10-31 | Optical system of laser scanner |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| KR890008655U KR890008655U (en) | 1989-05-29 |
| KR900003380Y1 true KR900003380Y1 (en) | 1990-04-23 |
Family
ID=19269082
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| KR2019870018793U KR900003380Y1 (en) | 1987-10-31 | 1987-10-31 | Optical system of laser scanner |
Country Status (1)
| Country | Link |
|---|---|
| KR (1) | KR900003380Y1 (en) |
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1987
- 1987-10-31 KR KR2019870018793U patent/KR900003380Y1/en not_active IP Right Cessation
Also Published As
| Publication number | Publication date |
|---|---|
| KR890008655U (en) | 1989-05-29 |
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