JPH02127609A - Optical deflector - Google Patents
Optical deflectorInfo
- Publication number
- JPH02127609A JPH02127609A JP63283301A JP28330188A JPH02127609A JP H02127609 A JPH02127609 A JP H02127609A JP 63283301 A JP63283301 A JP 63283301A JP 28330188 A JP28330188 A JP 28330188A JP H02127609 A JPH02127609 A JP H02127609A
- Authority
- JP
- Japan
- Prior art keywords
- mirror surface
- cylinder body
- optical deflector
- longitudinal direction
- spiral
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Pending
Links
- 230000003287 optical effect Effects 0.000 title claims abstract description 18
- 230000015572 biosynthetic process Effects 0.000 abstract description 2
- 238000010586 diagram Methods 0.000 description 6
- 238000003384 imaging method Methods 0.000 description 3
- 230000000694 effects Effects 0.000 description 2
Abstract
Description
【発明の詳細な説明】
［産業上の利用分野］
本発明は光偏向器に関し、特に、印刷装置や複写機等に
使用されるデジタル記録光学系における高速光偏向器に
関する。DETAILED DESCRIPTION OF THE INVENTION [Field of Industrial Application] The present invention relates to an optical deflector, and particularly to a high-speed optical deflector in a digital recording optical system used in a printing device, a copying machine, or the like.
［従来の技術］
印刷装置や複写機等に使われる光偏向器には、等密度で
線形の走査線を高速に発生させることが要求される。[Prior Art] Optical deflectors used in printing devices, copying machines, etc. are required to generate linear scanning lines at equal density at high speed.
第３図は光偏向器の従来例の構成を示す図である。FIG. 3 is a diagram showing the configuration of a conventional optical deflector.
本従来例は、光偏向手段として多面体鏡（ポリゴンミラ
ー）を使用したものである。多面体鏡７はモータ１４に
より等速回転しており、光源８から出射され、コリメー
タレンズ９、シリンドリカルレンズ１０を通過して鏡面
上に入射したレーザ光は、回転軸に垂直な面状に、ある
広がり角度を持って走査される。レーザ光は外部からの
信号に従い変調されており、この走査光は結像レンズ１
１、ｆ・θレンズ１２を介して記録媒体に照射され所定
の記録がなされる。This conventional example uses a polygon mirror as a light deflecting means. The polyhedral mirror 7 is rotated at a constant speed by a motor 14, and the laser light emitted from the light source 8, passed through the collimator lens 9 and the cylindrical lens 10, and is incident on the mirror surface is arranged in a plane perpendicular to the rotation axis. Scanned with a spread angle. The laser light is modulated according to an external signal, and this scanning light passes through the imaging lens 1.
1. The recording medium is irradiated with light through the f/θ lens 12 to perform predetermined recording.
［発明が解決しようとする課題］
上述した従来の多面体鏡光偏向器は、多面体鏡反射面の
一点からレーザ光を走査し５ているので、充分な走査線
長を得ようとすると光偏向器（多面体鏡７）と結像面（
記録媒体１３）との距離を長くし７なければならないと
いう欠点がある。[Problems to be Solved by the Invention] The conventional polyhedral mirror light deflector described above scans the laser beam from one point on the polyhedral mirror reflection surface, so in order to obtain a sufficient scanning line length, the light deflector (polyhedral mirror 7) and the imaging surface (
The disadvantage is that the distance to the recording medium 13) must be increased.
また、多面体鏡は等速回転しているので、これに伴い反
射されるレーザ光は等角速度で偏向されるが、平坦な結
像面上を等速で走査させるためには補正し：ノズ１２が
必要となり、装置が大型化するという欠点がある。Also, since the polyhedral mirror rotates at a constant speed, the reflected laser beam is deflected at a constant angular speed, but in order to scan the flat image plane at a constant speed, correction is necessary: This has the disadvantage of increasing the size of the device.
［課題を解決するための手段］
本発明の光偏向器は、円筒体の表面部に、長手方向に沿
って螺旋状鏡面が形成されており、該円筒体は底面部の
中心を通る法線を軸として回転されるようになっており
、該底面部の中心を通る法線に沿って前記螺旋状鏡面に
向けて光を入射させ、該鏡面で一定の方向に反射した光
を前記円筒の長手方向に沿って走査する。[Means for Solving the Problems] In the optical deflector of the present invention, a spiral mirror surface is formed along the longitudinal direction on the surface of a cylindrical body, and the cylindrical body has a normal line passing through the center of the bottom surface. The spiral mirror surface is rotated around the axis, and light is incident on the spiral mirror surface along the normal line passing through the center of the bottom surface, and the light reflected in a certain direction by the mirror surface is reflected in the cylindrical shape. Scan along the longitudinal direction.
［作 用］
円筒表面の螺旋状鏡面において、レーザ光は常に一定方
向に反射されるものの、円筒体の回転に伴い、レーザ光
の反射位置が円筒体の長手方向に沿って順次走査される
ことになり、これにより光偏向器と結像面とを接近させ
て配電でき補正レンズも不要となる。[Function] Although the laser beam is always reflected in a fixed direction on the spiral mirror surface of the cylinder surface, as the cylinder rotates, the reflection position of the laser beam is sequentially scanned along the longitudinal direction of the cylinder. As a result, power can be distributed by bringing the optical deflector and the imaging plane close to each other, and a correction lens is not required.
［実施例］
次に、本発明の実施例について図面を参照して説明する
。[Example] Next, an example of the present invention will be described with reference to the drawings.
第１図は本発明の光偏向器の一実施例の構成を示す図で
ある。FIG. 1 is a diagram showing the configuration of an embodiment of the optical deflector of the present invention.
本実施例は、レーザプリンタの光学系の一部を構成して
いる円筒体１の表面には、螺旋状鏡面（図中、斜線が施
されている）１５が形成されており、円筒体１はモータ
２により矢印の向きに回転する。レーザ光は光源３より
発せられコリメータレンズ４を通過し、円筒体１の表面
上の螺旋状鏡面１５により直角に反射され、集光レンズ
５を通過して記録媒体６上に結像する。ここで円筒体１
の回転により、反射光は常に記録媒体６に対して垂直で
、かつ円筒体全長しく円周長）を−周期とする走査を繰
り返す。In this embodiment, a spiral mirror surface (shaded in the figure) 15 is formed on the surface of a cylindrical body 1 constituting a part of the optical system of a laser printer. is rotated by motor 2 in the direction of the arrow. Laser light is emitted from a light source 3, passes through a collimator lens 4, is reflected at right angles by a spiral mirror surface 15 on the surface of the cylinder 1, passes through a condenser lens 5, and forms an image on a recording medium 6. Here, cylinder 1
Due to the rotation of the recording medium 6, the reflected light is always perpendicular to the recording medium 6, and repeats scanning with a cycle equal to the total length of the cylinder (the circumference).
第２図は上述の螺旋状鏡面１５を有する円筒体１の概念
を説明するための図であり、円筒体を展開したものの斜
視図である。FIG. 2 is a diagram for explaining the concept of the cylindrical body 1 having the above-mentioned spiral mirror surface 15, and is a perspective view of the cylindrical body developed.
第２図においてａ部とｂ部を接合させるよう全体を歪曲
させる（ねじる）ことにより、上述の円筒体を得ること
ができる。The above-mentioned cylindrical body can be obtained by distorting (twisting) the entire body so as to join parts a and b in FIG. 2.
［発明の効果］
以上説明したように本発明は、表面上に螺旋状の鏡を持
つ円筒体を光偏向器とすることにより、記録媒体と光学
系を近接させて配置でき、補正レンズを省略できる効果
がある。[Effects of the Invention] As explained above, the present invention uses a cylindrical body with a spiral mirror on its surface as an optical deflector, so that the recording medium and the optical system can be placed close to each other, and the correction lens can be omitted. There is an effect that can be done.
第１図は本発明の光偏向器の一実施例の構成を示す図、
第２図は円筒体１の概念を説明するための図、第３図は
従来例を用いたレーザプリンタの光学系の構成を示す図
である。
１・・・・・・・・・円筒体、 ２，１４・・・・
・・モータ、３．８・・・・・・光源、
４．９・・・・・・コリメータレンズ、５．１１・・・
・・・結像１ノンズ、６．１３・・・・・・記録媒体、
７・・・・・・・・・多面体鏡、
ｌＯ・・・・・・・・・シリンドリカルレンズ、１２・
・・・・・・・・ｆ・θ・・・・・・レンズ、１５・・
・・・・・・・螺旋状鏡面。
？５２図FIG. 1 is a diagram showing the configuration of an embodiment of the optical deflector of the present invention,
FIG. 2 is a diagram for explaining the concept of the cylindrical body 1, and FIG. 3 is a diagram showing the configuration of an optical system of a laser printer using a conventional example. 1......Cylindrical body, 2,14...
...Motor, 3.8...Light source, 4.9...Collimator lens, 5.11...
...Image formation 1 nons, 6.13...Recording medium,
7... Polyhedral mirror, lO... Cylindrical lens, 12.
......f・θ...lens, 15...
・・・・・・Spiral mirror surface. ? Figure 52
Claims (1)
形成されており、該円筒体は底面部の中心を通る法線を
軸として回転されるようになっており、該底面部の中心
を通る法線に沿って前記螺旋状鏡面に向けて光を入射さ
せ、該鏡面で一定の方向に反射した光を前記円筒の長手
方向に沿って走査する光偏向器。1. A spiral mirror surface is formed along the longitudinal direction on the surface of the cylindrical body, and the cylindrical body can be rotated about a normal line passing through the center of the bottom surface. An optical deflector that makes light incident on the spiral mirror surface along a normal line passing through the center of the cylinder, and scans the light reflected in a certain direction on the mirror surface along the longitudinal direction of the cylinder.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP63283301A JPH02127609A (en) | 1988-11-08 | 1988-11-08 | Optical deflector |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP63283301A JPH02127609A (en) | 1988-11-08 | 1988-11-08 | Optical deflector |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| JPH02127609A true JPH02127609A (en) | 1990-05-16 |
Family
ID=17663681
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP63283301A Pending JPH02127609A (en) | 1988-11-08 | 1988-11-08 | Optical deflector |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPH02127609A (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH0995006A (en) * | 1994-03-04 | 1997-04-08 | Ruhlatec Ind Gmbh | Method and apparatus for regenerating data |
Citations (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS625213A (en) * | 1985-06-29 | 1987-01-12 | Tokyo Juki Ind Co Ltd | Laser beam scanning reflection mirror |
-
1988
- 1988-11-08 JP JP63283301A patent/JPH02127609A/en active Pending
Patent Citations (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS625213A (en) * | 1985-06-29 | 1987-01-12 | Tokyo Juki Ind Co Ltd | Laser beam scanning reflection mirror |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH0995006A (en) * | 1994-03-04 | 1997-04-08 | Ruhlatec Ind Gmbh | Method and apparatus for regenerating data |
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