US 6,981,775 B2
Illumination apparatus and camera
Yoshiharu Tenmyo, Kanagawa (Japan)
Assigned to Canon Kabushiki Kaisha, Tokyo (Japan)
Filed on Dec. 09, 2003, as Appl. No. 10/730,950.
Claims priority of application No. 2002-362780 (JP), filed on Dec. 13, 2002.
Prior Publication US 2004/0120135 A1, Jun. 24, 2004
Int. Cl. G03B 15/02 (2006.01)
U.S. Cl. 362—16 3 Claims
OG exemplary drawing
 
1. An illumination apparatus comprising:
a light source; and
a condensing unit that condenses light emitted from the light source toward the optical axis;
wherein the condensing unit includes
a negative lens portion that is arranged on a front side of the apparatus and has negative refractive power, a positive lens portion that is arranged near the optical axis and has positive refractive power, and a reflection portion that reflects emitted light that is not directed to the positive lens portion toward the optical axis,
wherein negative lens portion is shaped such that its length in the vertical direction of the apparatus is smaller than a maximum length of the condensing unit in the vertical direction of the apparatus.