SYSTEM AND METHOD FOR MODULATING LIGHT INTENSITY

摘要

The present invention relates to a light intensity modulator (300) that employs a hologram. In one embodiment, the light intensity modulator (300) includes an electrical circuit (304) and a holographic optical element (302) containing the hologram. The holographic optical element is electrically coupled to and receives a variable voltage generated by the electric circuit. Additionally, the holographic optical element receives an input light (310) from a light source (306). The holographic optical element receives and diffracts the input light to produce first (312) and second (314) output lights. An intensity of the first output light varies directly with the magnitude of the voltage. An intensity of the second output light varies indirectly with the magnitude of the voltage. The first and second output lights define a non-zero angle (316) therebetween.