JPH049013U - - Google Patents
Info
- Publication number
- JPH049013U JPH049013U JP4882990U JP4882990U JPH049013U JP H049013 U JPH049013 U JP H049013U JP 4882990 U JP4882990 U JP 4882990U JP 4882990 U JP4882990 U JP 4882990U JP H049013 U JPH049013 U JP H049013U
- Authority
- JP
- Japan
- Prior art keywords
- light amount
- optical system
- laser scanning
- scanning optical
- 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
- 230000003287 optical effect Effects 0.000 claims description 5
- 238000002834 transmittance Methods 0.000 claims description 4
- 239000011521 glass Substances 0.000 description 1
Description
第１図は本考案の一実施例の斜視図、第２図は
第１図の補正板の透過率特性を示すグラフ、第３
図は第１図の感光記録媒体上における光量分布を
示すグラフ、第４図は補正板の透過率特性の他の
例を示すグラフ、第５図は本考案の光量補正手段
の他の実施例を示す平面図、第６図は従来のレー
ザー走査光学系の例を示す斜視図、第７図は第６
図の例における感光記録媒体上での光量分布を示
すグラフ、そして第８図は空気からガラスに入射
する光の入射角に体する反射光強度を示すグラフ
である。
１……レーザー発光素子、２……コリメータレ
ンズ、３……回転多面鏡、４……レンズブロツク
、５……反射ミラー、６……感光記録媒体、７…
…補正板、Ｘ……像高。
FIG. 1 is a perspective view of an embodiment of the present invention, FIG. 2 is a graph showing the transmittance characteristics of the correction plate shown in FIG. 1, and FIG.
The figure is a graph showing the light amount distribution on the photosensitive recording medium of FIG. 1, FIG. 4 is a graph showing another example of the transmittance characteristics of the correction plate, and FIG. 5 is another embodiment of the light amount correction means of the present invention. 6 is a plan view showing an example of a conventional laser scanning optical system, and FIG. 7 is a perspective view showing an example of a conventional laser scanning optical system.
FIG. 8 is a graph showing the light amount distribution on the photosensitive recording medium in the example shown, and FIG. 8 is a graph showing the reflected light intensity as a function of the incident angle of light incident on the glass from the air. DESCRIPTION OF SYMBOLS 1... Laser emitting element, 2... Collimator lens, 3... Rotating polygon mirror, 4... Lens block, 5... Reflection mirror, 6... Photosensitive recording medium, 7...
...Correction plate, X...image height.
Claims (1)
おいて、上記回転多面鏡の後段側に像高方向に沿
う光量分布を補正する光量補正手段を配してなり
、該光量補正手段は、上記像高中央部から両端部
にかけて透過率を向上させたものであるレーザー
走査光学系の光量補正装置。 (2) 上記透過率の向上を段階的にした請求項１
のレーザー走査光学系の光量補正装置。[Claims for Utility Model Registration] (1) In a laser scanning optical system using a rotating polygon mirror, a light amount correction means for correcting the light amount distribution along the image height direction is disposed on the downstream side of the rotating polygon mirror, The light amount correcting means is a light amount correcting device for a laser scanning optical system, which improves transmittance from the central portion of the image height to both ends. (2) Claim 1 in which the transmittance is improved in stages.
Light intensity correction device for laser scanning optical system.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP4882990U JPH049013U (en) | 1990-05-10 | 1990-05-10 |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP4882990U JPH049013U (en) | 1990-05-10 | 1990-05-10 |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| JPH049013U true JPH049013U (en) | 1992-01-27 |
Family
ID=31565991
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP4882990U Pending JPH049013U (en) | 1990-05-10 | 1990-05-10 |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPH049013U (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2008216911A (en) * | 2007-03-07 | 2008-09-18 | Ricoh Co Ltd | Optical scanner/image forming apparatus |
-
1990
- 1990-05-10 JP JP4882990U patent/JPH049013U/ja active Pending
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2008216911A (en) * | 2007-03-07 | 2008-09-18 | Ricoh Co Ltd | Optical scanner/image forming apparatus |