Title:
照明装置及び撮影装置
Document Type and Number:
Japanese Patent JP4549109
Kind Code:
B2
Abstract:
In an illumination apparatus, an optical element has an exit surface in which an inclination to a perpendicular to an irradiation optical axis in a first area is greater than that of a second area, and the inclination of the first area gradually increases in order from the irradiation optical axis, an intermediate part and a periphery of the exit surface. The first and second areas are defined as those divided by an interface surface that includes an irradiation optical axis and is orthogonal to a plane that is orthogonal to a longitudinal direction of the light source. A first reflective surface reflects first light to the intermediate part in the first area. A second reflective surface reflects second light to the periphery in the second area.
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Inventors:
Nobuhisa Kojima
Application Number:
JP2004175371A
Publication Date:
September 22, 2010
Filing Date:
June 14, 2004
Export Citation:
Assignee:
Canon Inc
International Classes:
G03B15/02; G03B15/05; F21V5/04; F21V7/00; F21V7/09; F21V13/04; G03B15/03; H04N5/222; F21Y103/00
Domestic Patent References:
| JP11183973A | ||||
| JP8076195A | ||||
| JP2002139777A | ||||
| JP8262537A |
Attorney, Agent or Firm:
Ryoichi Takaoka