Patent ID: 6352346
Filing Date: 2002-03-05
Classification: G03B

Abstract:
An optical apparatus comprising:a reflective type spatial light modulator for modulating an incoming light beam shone into the optical apparatus by selectively reflecting the incoming light beam; a light beam selecting surface for selectively reflecting the incoming light beam according to an angle of incidence at which the incoming light beam strikes the light beam selecting surface; and deflecting means disposed between the reflective type spatial light modulator and the light beam selecting surface so as to deflect at least one of the incoming light beam and a reflected light beam reflected from the reflective type spatial light modulator, wherein the incoming light beam is reflected from or transmitted through the light beam selecting surface so as to be shone, through the deflecting means, on the reflective type spatial light modulator, and is then selectively reflected by the reflective type spatial light modulator so as to be modulated into the reflected light beam, which is then shone, through the deflecting means again, on the light beam selecting surface so as to be transmitted therethrough or reflected therefrom according to whether the incoming light has been reflected therefrom or transmitted therefrom, respectively.