OPTICAL DEVICE AND OPTICAL METHOD

摘要

PROBLEM TO BE SOLVED: To provide a solution for achieving high image-forming quality even if the luminance is the same. SOLUTION: An optical device comprises at least a first light-emitting device (LE1) and a second light-emitting device (LE2), and at least a light adder (1). The optical device is constituted such that the lights from the first and second light-emitting devices (LE1, LE2) are added to form one light beam. COPYRIGHT: (C)2008,JPO&INPIT