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.
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