Patent ID: 8957349
Filing Date: 2015-02-17
Classification: B23K,B41J,B41M,G02B,G03H

Abstract:
1. A light radiating device which radiates a modulated light of a whole pattern including two or more basic patterns onto an object collectively, the light radiating device comprising: a light source which outputs a light; a phase-modulation type spatial light modulator which inputs the light output from the light source, displays a whole hologram which modulates the phase of the light in each of a plurality of pixels which is two-dimensionally arrayed, and outputs the modulated light after the phase modulation; a condensing optical system which inputs the modulated light output from the spatial light modulator, and images the modulated light in the object; and a control unit which configures a whole hologram on the basis of a plurality of basic holograms, and causes the spatial light modulator to display the configured whole hologram, wherein the control unit is further configured to determine a position and a size of a display region of each basic hologram in the spatial light modulator on the basis of an intensity of a light input to a display region of the basic hologram in the spatial light modulator I, the diffraction efficiency of the light in the basic hologram η, and the number of condensing points in a basic pattern corresponding to the basic hologram n.