OPTICAL SYSTEM

摘要

PROBLEM TO BE SOLVED: To provide an optical system capable of optimally changing the spread angle of luminous flux from a light source to an aperture and improving the utilization efficiency of light.

SOLUTION: The optical system emits luminous flux made incident from the light source and having different spread angles in two directions orthogonal to each other and orthogonal to an optical axis after shaping the luminous flux to have the spread angle different from the one when it is made incident. The optical system is constituted by combining a plurality of optical elements and also has an aperture restricting function for emitted light, and the total sum of refractive power of a plurality of optical elements is made different in each of the two directions.

COPYRIGHT: (C)2004,JPO&NCIPI