JPH02149815A - Polygon mirror - Google Patents
Polygon mirrorInfo
- Publication number
- JPH02149815A JPH02149815A JP30448388A JP30448388A JPH02149815A JP H02149815 A JPH02149815 A JP H02149815A JP 30448388 A JP30448388 A JP 30448388A JP 30448388 A JP30448388 A JP 30448388A JP H02149815 A JPH02149815 A JP H02149815A
- Authority
- JP
- Japan
- Prior art keywords
- mirror
- boundary
- laser light
- chamfered
- polygon mirror
- 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
- 230000031700 light absorption Effects 0.000 description 3
- 229910000838 Al alloy Inorganic materials 0.000 description 2
- 238000009792 diffusion process Methods 0.000 description 2
- 229920005830 Polyurethane Foam Polymers 0.000 description 1
- 239000011358 absorbing material Substances 0.000 description 1
- 239000000853 adhesive Substances 0.000 description 1
- 230000001070 adhesive effect Effects 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- -1 felt Substances 0.000 description 1
- 239000006260 foam Substances 0.000 description 1
- 238000003754 machining Methods 0.000 description 1
- 238000004519 manufacturing process Methods 0.000 description 1
- 239000000463 material Substances 0.000 description 1
- 239000007769 metal material Substances 0.000 description 1
- 239000004745 nonwoven fabric Substances 0.000 description 1
- 230000002093 peripheral effect Effects 0.000 description 1
- 108091008695 photoreceptors Proteins 0.000 description 1
- 239000011496 polyurethane foam Substances 0.000 description 1
- 229920003002 synthetic resin Polymers 0.000 description 1
- 239000000057 synthetic resin Substances 0.000 description 1
Classifications
-
- G—PHYSICS
- G02—OPTICS
- G02B—OPTICAL ELEMENTS, SYSTEMS OR APPARATUS
- G02B5/00—Optical elements other than lenses
- G02B5/08—Mirrors
- G02B5/09—Multifaceted or polygonal mirrors, e.g. polygonal scanning mirrors; Fresnel mirrors
Landscapes
- Physics & Mathematics (AREA)
- General Physics & Mathematics (AREA)
- Optics & Photonics (AREA)
- Mechanical Optical Scanning Systems (AREA)
Abstract
Description
【発明の詳細な説明】
産業上の利用分野
この発明は、たとえばレーザプリンタなどにおいてレー
ザ光を偏向させて感光体上を走査させるために使用され
るポリゴンミラー（回転多面りに関する。DETAILED DESCRIPTION OF THE INVENTION Field of the Invention The present invention relates to a polygon mirror (rotating polygon) used in, for example, a laser printer to deflect a laser beam to scan a photoreceptor.
従来の技術
この種の従来のポリゴンミラーは、第５図に示すように
、アルミニウム合金などによって正多角形柱状に形成さ
れている。ポリゴンミラーの外周面に複数の鏡面（１）
が設けられ、鏡面（１）の境界部（２）は尖っている。BACKGROUND OF THE INVENTION A conventional polygon mirror of this type is formed into a regular polygonal column of aluminum alloy or the like, as shown in FIG. Multiple mirror surfaces on the outer peripheral surface of the polygon mirror (1)
is provided, and the boundary (2) of the mirror surface (1) is sharp.
発明が解決しようとする課題
ポリゴンミラーは５００ Ｏｒｐｍ以上の高速で回転す
るが、上記のように境界部（２）が尖った従来のもので
は、いわゆる風切り音による騒音が大きい。Problems to be Solved by the Invention Polygon mirrors rotate at high speeds of 500 Orpm or more, but the conventional mirrors with sharp boundary portions (2) as described above produce a lot of noise due to so-called wind noise.
また、ポリゴンミラーの境界部（２）にレーザ光を照射
すると、これが散乱して散乱光が走査領域に入ることが
あり、これを防止するためには、境界部（２）にレーザ
光が照射しないように、レーザ光のオン・オフを別に制
御する必要がある。Also, if the boundary part (2) of the polygon mirror is irradiated with laser light, it may be scattered and the scattered light may enter the scanning area. To prevent this, it is necessary to separately control the on/off of the laser beam.
この発明の目的は、上記の問題を解決したポリゴンミラ
ーを提供することにある。An object of the present invention is to provide a polygon mirror that solves the above problems.
課題を解決するための手段
この発明によるポリゴンミラーは、鏡面の境界部に、曲
面または面取り面が形成されていることを特徴とするも
のである。Means for Solving the Problems The polygon mirror according to the present invention is characterized in that a curved surface or a chamfered surface is formed at the boundary of the mirror surface.
鏡面の境界部に別の部材が取付けられて、この部材に曲
面が形成されることもある。Another member may be attached to the boundary of the mirror surface to form a curved surface on this member.
鏡面の境界部の曲面または面取り面が、レーザ光吸収色
になっていることもある。The curved or chamfered surface at the boundary of the mirror surface may have a color that absorbs laser light.
鏡面の境界部に取付けられる別の部材が、レーザ光吸収
部材またはレーザ光反射拡散部材であることもある。Another member attached to the boundary of the mirror surface may be a laser light absorbing member or a laser light reflecting and diffusing member.
作 用
鏡面の境界部が曲面または面取り面となっているので、
高速回転時に発生する風きり音が低減する。The boundary between the working mirror surfaces is a curved or chamfered surface, so
Reduces wind noise that occurs during high-speed rotation.
鏡面の境界部の曲面または面取り面がレーザ光吸収色に
なっている場合、または鏡面の境界部に取付けられる別
の部材がレーザ光吸収部材またはレーザ光反射拡散部材
である場合は、境界部にレーザ光を照射しても、散乱光
が発生することがなく、境界部にレーザ光が照射しない
ようにレーザ光のオン・オフを別に制御する必要がない
。If the curved or chamfered surface at the boundary of the mirror surface has a laser light absorption color, or if another member attached to the boundary of the mirror surface is a laser light absorption member or a laser light reflection/diffusion member, Even when laser light is irradiated, scattered light does not occur, and there is no need to separately control on/off of the laser light so that the boundary portion is not irradiated with laser light.
実施例 以下、図面を参照して、この発明の詳細な説明する。Example Hereinafter, the present invention will be described in detail with reference to the drawings.
第１図および第２図は、第１実施例を示す。1 and 2 show a first embodiment.
第１図において、従来と同様に正多角形柱状に形成され
たポリゴンミラーの鏡面（Ｉ０）の境界部に、面取りが
施されて、面取り面（１１）が形成されている。そして
、第２図からも明らかなように、鏡面（１０）と面取り
面（１１）のなす角度αが、面取り面（１１）がないと
仮定した場合の鏡面（１０）のなす角度βより大きくな
っている。このため、高速回転時に発生する風切り音が
低減する。In FIG. 1, the boundary portion of the mirror surface (I0) of a polygon mirror formed in the shape of a regular polygonal column is chamfered to form a chamfered surface (11) as in the conventional art. As is clear from Figure 2, the angle α between the mirror surface (10) and the chamfered surface (11) is larger than the angle β formed by the mirror surface (10) assuming that there is no chamfered surface (11). It has become. Therefore, wind noise generated during high-speed rotation is reduced.
第３図は第２実施例を示し、第１実施例と同じ部分には
同一の符号を付している。FIG. 3 shows a second embodiment, in which the same parts as in the first embodiment are given the same reference numerals.
第２実施例の場合、鏡面（ｌＯ）の境界部に、鏡面（１
０）と連続する断面円弧状の曲面（１２）が形成されて
、尖った部分がなくされている。このため、やはり、高
速回転時に発生する風切り音が低減する。In the case of the second embodiment, the mirror surface (1
A curved surface (12) having an arcuate cross section that is continuous with 0) is formed, and sharp parts are eliminated. Therefore, wind noise generated during high-speed rotation is also reduced.
第１および第２実施例において、面取り面（１１）およ
び曲面（１２）をレーザ光吸収色にすることができる。In the first and second embodiments, the chamfered surface (11) and the curved surface (12) can be colored to absorb laser light.
レーザ光吸収色としては、黒またはレーザ光の波長の色
を含まない色（たとえば波長７８０ ｒ＋ＩＩｌのレー
ザ光の場合は紫や青など）が使用される。このようにす
れば、境界部の面取り面（１１）および曲面（１２）に
レーザ光を照射しても、散乱光が発生することがなく、
境界部にレーザ光が照射しないようにレーザ光のオン・
オフを別に制御する必要がない。As the laser light absorption color, black or a color that does not include the color of the wavelength of the laser light (for example, violet or blue in the case of a laser light with a wavelength of 780 r+IIl) is used. In this way, even if the chamfered surface (11) and curved surface (12) at the boundary are irradiated with laser light, scattered light will not be generated.
Turn on and off the laser beam so that the laser beam does not irradiate the boundary area.
There is no need to separately control off.
第４図は第３実施例を示し、第２実施例と同じ部分には
同一の符号を付している。FIG. 4 shows a third embodiment, in which the same parts as in the second embodiment are given the same reference numerals.
第３実施例の場合、鏡面（１０）の境界部に、たとえば
合成樹脂製の境界部材（１３）が接着などの適宜な手段
によって固着され、この境界部材（１３）の部分が曲面
（Ｉ４）となっている。このため、やはり、境界部に尖
った部分がなくなり、高速回転時に発生する風切り音が
低減する。In the case of the third embodiment, a boundary member (13) made of synthetic resin, for example, is fixed to the boundary part of the mirror surface (10) by an appropriate means such as adhesive, and a portion of this boundary member (13) forms a curved surface (I4). It becomes. Therefore, there are no sharp edges at the boundary, and wind noise generated during high-speed rotation is reduced.
ポリゴンミラーをアルミニウム合金など金属材料で作る
場合、鏡面（ｌＯ）の境界部に面取り面（１１）や曲面
（１２）を形成すると、その分だけ加工工数が増え、コ
ストが高くなる。ところが、第３実施例のように境界部
に別の部材（１３）を取付けて曲面（１４）を形成する
ようにすれば、加工工数が増えることがなく、製作が容
易で、コストも安くてすむ。When a polygon mirror is made of a metal material such as an aluminum alloy, forming a chamfered surface (11) or a curved surface (12) at the boundary of the mirror surface (lO) increases the number of processing steps and costs accordingly. However, if another member (13) is attached to the boundary part to form the curved surface (14) as in the third embodiment, the number of machining steps does not increase, the manufacturing is easy, and the cost is low. I'm done.
また、境界部材（１３）を適当なレーザ光吸収部材また
はレーザ光反射拡散部材で作ることができる。レーザ光
吸収部材およびレーザ光反射拡散部材としては、たとえ
ばポリウレタンフォームなどの発泡体、フェルト、不織
布などが使用される。このようにすれば、やはり、境界
部１才（１３）にレーザ光を照射しても、散乱光が発生
することがない。Additionally, the boundary member (13) can be made of a suitable laser light absorbing material or laser light reflecting/diffusing material. As the laser light absorbing member and the laser light reflecting and diffusing member, for example, foam such as polyurethane foam, felt, nonwoven fabric, etc. are used. In this way, even if the boundary portion 13 is irradiated with laser light, scattered light will not be generated.
発明の効果
この発明のポリゴンミラーによれば、鏡面の境界部に曲
面または面取り面が形成されているので、高速回転時に
発生する風きり音が低減する。Effects of the Invention According to the polygon mirror of the present invention, since a curved surface or a chamfered surface is formed at the boundary of the mirror surface, wind noise generated during high-speed rotation is reduced.
また、鏡面の境界部の曲面または面取り面がレーザ光吸
収色になっていること、または鏡面の境界部に取付けら
れる別の部材がレーザ光吸収部材またはレーザ光反射拡
散部材であることにより、境界部にレーザ光を照射して
も、散乱光が発生することがなくなり、境界部にレーザ
光が照射しないようにレーザ光のオン・オフを別に制御
する必要がなくなる。In addition, the curved or chamfered surface at the boundary of the mirror surface has a laser light-absorbing color, or the another member attached to the boundary of the mirror surface is a laser light-absorbing member or a laser light reflection/diffusion member, so that the boundary Even if the laser beam is irradiated to the boundary area, scattered light will not be generated, and there is no need to separately control the on/off of the laser beam so that the boundary area is not irradiated with the laser beam.
第１図はこの発明の第１実施例を示すポリゴンミラーの
斜視図、第２図は鏡面の境界部を拡大して示す平面図、
第３図は第２実施例を示す第１図相当の図面、第４図は
第３実施例を示す第１図相当の図面、第５図は従来例を
示す第１図相当の図面である。
（１０）・・・鏡面、（１１）・・・面取り面、（１２
）・・・曲面、（１３）・・・境界部材、（１４）・・
・曲面。
第３図FIG. 1 is a perspective view of a polygon mirror showing a first embodiment of the present invention, and FIG. 2 is a plan view showing an enlarged boundary of the mirror surface.
3 is a drawing equivalent to FIG. 1 showing the second embodiment, FIG. 4 is a drawing equivalent to FIG. 1 showing the third embodiment, and FIG. 5 is a drawing equivalent to FIG. 1 showing a conventional example. . (10)... Mirror surface, (11)... Chamfered surface, (12
)...Curved surface, (13)...Boundary member, (14)...
·curved surface. Figure 3
Claims (4)
ンミラーであって、 鏡面の境界部に、曲面または面取り面が形成されている
ことを特徴とするポリゴンミラー。(1) A polygon mirror having a regular polygonal cross section and having a plurality of mirror surfaces on its outer periphery, characterized in that a curved surface or a chamfered surface is formed at the boundary between the mirror surfaces.
材に曲面が形成されていることを特徴とする請求項（１
）のポリゴンミラー。(2) Claim (1) characterized in that another member is attached to the boundary portion of the mirror surface and a curved surface is formed on this member.
) polygon mirror.
吸収色になっていることを特徴とする請求項（１）のポ
リゴンミラー。(3) The polygon mirror according to claim 1, wherein the curved surface or chamfered surface at the boundary of the mirror surface has a laser light absorbing color.
光反射拡散部材であることを特徴とする請求項（２）の
ポリゴンミラー。(4) The polygon mirror according to claim 2, wherein the other member is a laser light absorbing member or a laser light reflecting and diffusing member.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP30448388A JPH02149815A (en) | 1988-11-30 | 1988-11-30 | Polygon mirror |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP30448388A JPH02149815A (en) | 1988-11-30 | 1988-11-30 | Polygon mirror |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| JPH02149815A true JPH02149815A (en) | 1990-06-08 |
Family
ID=17933574
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP30448388A Pending JPH02149815A (en) | 1988-11-30 | 1988-11-30 | Polygon mirror |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPH02149815A (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| EP0706066A1 (en) * | 1994-10-04 | 1996-04-10 | Canon Kabushiki Kaisha | Metal mirror and method of manufacturing the same |
-
1988
- 1988-11-30 JP JP30448388A patent/JPH02149815A/en active Pending
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| EP0706066A1 (en) * | 1994-10-04 | 1996-04-10 | Canon Kabushiki Kaisha | Metal mirror and method of manufacturing the same |
| US5692287A (en) * | 1994-10-04 | 1997-12-02 | Canon Kabushiki Kaisha | Method of manufacturing a metal polygon mirror |
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