发明名称 |
TRANSMISSIONSBELEUCHTUNGSANORDNUNG FUER EIN BILDABTASTGERAET |
摘要 |
Disclosed is an improved transmission illumination device for use in a picture scanning device such as an electronic picture scanner which can illuminate an annular region around an illuminated spot. This annular illuminated spot is produced by using an annular convex lens as part of an optical system. Since the area surrounding the illuminated spot is also illuminated, finding a desired spot on an original picture is greatly facilitated. Having an illuminated annular region does not create any problem which may arise from flare light if an iris diaphragm is provided in a light receiving head for the exclusion of the light emitted from the illuminated annular area. |
申请公布号 |
DE3335854(A1) |
申请公布日期 |
1984.04.05 |
申请号 |
DE19833335854 |
申请日期 |
1983.10.03 |
申请人 |
DAINIPPON SCREEN SEIZO K.K. |
发明人 |
FUJII,TERUO;KATSUYAMA,MIKIZO |
分类号 |
G02B27/00;G03F1/00;G03F1/90;H04N1/028;H04N1/029;H04N1/04;H04N1/407 |
主分类号 |
G02B27/00 |
代理机构 |
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代理人 |
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主权项 |
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地址 |
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