Patent ID: 7680013
Filing Date: 2010-03-16
Classification: G11B

Abstract:
1. An optical information recording and reproducing apparatus for recording information by allowing information light and reference light to interfere with each other and reproducing the information using the reference light, comprising: a light source; a spatial light modulator for generating at least an information light with respect to a light beam from the light source; an objective lens for irradiating a recording medium with the light beam from the spatial light modulator; and a photodetector element for receiving a reproduction light from the recording medium, wherein the spatial light modulator and the photodetector element are formed on a same semiconductor substrate, wherein the light beam from the light source is generated into the information light and the reference light having the same optical axis, based on the spatial light modulator, and wherein a pixel constituting the spatial light modulator and a pixel constituting the photodetector element are arranged alternately in a horizontal direction and a vertical direction on the semiconductor substrate.