发明名称 Illumination device and photographing apparatus
摘要 An illuminating device comprises a light source and a light guide member which allows light supplied by the light source to enter the light guide member and guides the light to a predetermined light exit position while totally reflecting the light in the light guide member, the light guide member having, in a vicinity of a light entrance surface of the light guide member, a nonuniform refractive index distribution for making a light distribution characteristic different between a light entrance side and a light exit side. A photographing apparatus comprises a photographing optical system for photographing an image of an object and an illuminating system for illuminating the object. The illuminating system includes a light source and a light guide member which allows light supplied by the light source to enter the light guide member and guides the light to a predetermined light exit position while totally reflecting the light in the light guide member, the light guide member having, in a vicinity of a light entrance surface of the light guide member, a nonuniform refractive index distribution for making a light distribution characteristic different between a light entrance side and a light exit side.
申请公布号 US5926658(A) 申请公布日期 1999.07.20
申请号 US19970886555 申请日期 1997.07.01
申请人 CANON KABUSHIKI KAISHA 发明人 TENMYO, YOSHIHARU
分类号 G03B15/05;F21V8/00;G02B27/00;G03B15/03;(IPC1-7):G03B15/03 主分类号 G03B15/05
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