JPH0248940U - - Google Patents
Info
- Publication number
- JPH0248940U JPH0248940U JP12824388U JP12824388U JPH0248940U JP H0248940 U JPH0248940 U JP H0248940U JP 12824388 U JP12824388 U JP 12824388U JP 12824388 U JP12824388 U JP 12824388U JP H0248940 U JPH0248940 U JP H0248940U
- Authority
- JP
- Japan
- Prior art keywords
- diaphragm
- test pattern
- projection lens
- light
- protruding
- 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 2
- 238000005286 illumination Methods 0.000 claims 1
- 210000001747 pupil Anatomy 0.000 claims 1
- 238000010586 diagram Methods 0.000 description 2
- 238000003384 imaging method Methods 0.000 description 1
- 238000000926 separation method Methods 0.000 description 1
Landscapes
- Testing, Inspecting, Measuring Of Stereoscopic Televisions And Televisions (AREA)
Description
第１図は本発明をカラーテレビカメラの一部に
適用したときの一実施例の光学系の概略図、第２
図、第３図は各々第１図の一部分の説明図である
。
図中、１は光源、２はコンデンサーレンズ、３
はテストパターン、４は投影レンズ、５は絞り、
５ａは突出遮光部、６は色分解プリズム、７は撮
像部である。
FIG. 1 is a schematic diagram of an optical system of an embodiment when the present invention is applied to a part of a color television camera, and FIG.
3 are explanatory diagrams of a portion of FIG. 1, respectively. In the figure, 1 is a light source, 2 is a condenser lens, and 3
is the test pattern, 4 is the projection lens, 5 is the aperture,
5a is a protruding light shielding part, 6 is a color separation prism, and 7 is an imaging part.
Claims (1)
部等から成るグレースケール部を設けたアストパ
ターンを照明系により照明し、該テストパターン
を投影レンズにより所定面上に投影するテストパ
ターン投影装置において、該投影レンズの瞳面近
傍に該投影レンズの光軸に向かつて突出した突出
遮光部を有する絞りを設けたことを特徴とするテ
ストパターン投影装置。 (2) 前記絞りの突出遮光部は前記グレースケー
ル部から生ずる０次光を通過させ、所定次数の回
折光の一部を遮光する形状より構成されているこ
とを特徴とする請求項１記載のテストパターン投
影装置。[Claims for Utility Model Registration] (1) An illumination system illuminates an ast pattern with a gray scale area consisting of multiple minute non-transparent areas or semi-transparent areas such as halftone dots, and the test pattern is projected through a projection lens. A test pattern projection device for projecting images onto a predetermined surface using a diaphragm, characterized in that a diaphragm having a protruding light-shielding portion protruding toward the optical axis of the projection lens is provided near the pupil plane of the projection lens. . (2) The protruding light-shielding portion of the diaphragm has a shape that allows zero-order light generated from the gray scale portion to pass through and blocks a portion of diffracted light of a predetermined order. Test pattern projection device.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP12824388U JPH0248940U (en) | 1988-09-30 | 1988-09-30 |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP12824388U JPH0248940U (en) | 1988-09-30 | 1988-09-30 |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| JPH0248940U true JPH0248940U (en) | 1990-04-05 |
Family
ID=31381399
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP12824388U Pending JPH0248940U (en) | 1988-09-30 | 1988-09-30 |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPH0248940U (en) |
-
1988
- 1988-09-30 JP JP12824388U patent/JPH0248940U/ja active Pending
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