JPS644430U - - Google Patents
Info
- Publication number
- JPS644430U JPS644430U JP9726487U JP9726487U JPS644430U JP S644430 U JPS644430 U JP S644430U JP 9726487 U JP9726487 U JP 9726487U JP 9726487 U JP9726487 U JP 9726487U JP S644430 U JPS644430 U JP S644430U
- Authority
- JP
- Japan
- Prior art keywords
- slit
- variable magnification
- width
- optical system
- magnification
- 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
- 230000001105 regulatory effect Effects 0.000 claims description 3
- 238000003384 imaging method Methods 0.000 claims 1
- 238000000034 method Methods 0.000 claims 1
- 238000010586 diagram Methods 0.000 description 1
Landscapes
- Exposure Or Original Feeding In Electrophotography (AREA)
- Projection-Type Copiers In General (AREA)
- Variable Magnification In Projection-Type Copying Machines (AREA)
- Optical Systems Of Projection Type Copiers (AREA)
Description
第１図は本考案が適用される変倍光学系の構成
の一例を示す断面図、第２図は本考案による照度
補正枠の形状を示す平面図、第３図は変倍時の感
光体上の照度分布曲線図、第４図は公知の縮小時
の照度分布補正装置の一例を示す斜視図である。
２……露光ランプ、３，４，５，７，８，９…
…ミラー、６……レンズ、１０……感光体ドラム
、１４……スリツト幅規制部材、１５……照度補
正枠、１６……窓。
Fig. 1 is a sectional view showing an example of the configuration of a variable magnification optical system to which the present invention is applied, Fig. 2 is a plan view showing the shape of the illuminance correction frame according to the present invention, and Fig. 3 is a photoconductor during variable magnification. The upper illuminance distribution curve diagram and FIG. 4 are perspective views showing an example of a known illuminance distribution correction device during reduction. 2... Exposure lamp, 3, 4, 5, 7, 8, 9...
... Mirror, 6 ... Lens, 10 ... Photosensitive drum, 14 ... Slit width regulating member, 15 ... Illuminance correction frame, 16 ... Window.
Claims (1)
長補正を行ない縮小、拡大結像を行なう変倍機能
を備えたスリツト露光方式の複写機用光学系であ
り、原稿近傍にスリツト幅規制部材を設け、変倍
複写時、結像面でのスリツト幅が変倍率によつて
自動的に変化し、結像面の露光量を一定にする方
式の変倍光学系において、露光々路の結像面近傍
に窓の幅がスリツト長手方向の中央部で等倍時の
上記規制部材による結像幅に等しく、中央部より
両側に行くに従つて広くなる照度補正枠を設け拡
大時のスリツト長手方向の照度分布補正を行なう
ことを特徴とする変倍光学系。 This is an optical system for a copying machine using a slit exposure method, which has a variable magnification function that performs conjugate length correction by moving lenses and mirrors in the optical path direction to perform reduction and enlargement imaging.A slit width regulating member is provided near the original. During variable magnification copying, in a variable magnification optical system in which the slit width on the image forming plane automatically changes depending on the magnification ratio to maintain a constant exposure amount on the image forming surface, The width of the window is equal to the width of the image formed by the above-mentioned regulating member at the same magnification at the center of the longitudinal direction of the slit, and an illuminance correction frame is provided that widens from the center toward both sides to control the illuminance of the longitudinal direction of the slit when enlarged. A variable magnification optical system characterized by performing distribution correction.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP9726487U JPS644430U (en) | 1987-06-26 | 1987-06-26 |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP9726487U JPS644430U (en) | 1987-06-26 | 1987-06-26 |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| JPS644430U true JPS644430U (en) | 1989-01-11 |
Family
ID=31322573
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP9726487U Pending JPS644430U (en) | 1987-06-26 | 1987-06-26 |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPS644430U (en) |
-
1987
- 1987-06-26 JP JP9726487U patent/JPS644430U/ja active Pending
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