Patent ID: 8434873
Filing Date: 2013-05-07
Classification: G03B,G06F,H04N

Abstract:
1. An interactive projection device, comprising: a light source configured to emit an input light beam, wherein the light source comprises a visible light emitting device; a first beam splitter configured to split the input light beam into first and second split light beams; a second beam splitter configured to split a scattered light beam received from a surface into third and fourth split light beams; an image forming device configured to produce an image light beam based on the first split light beam and emit the image light beam onto the surface through the first and second splitters, thereby generating a projection image on the surface; a cube configured to transmit the third split light beam from the second beam splitter and operable for compensating the optical path difference between the image light beam and the third light split beam; and a detector configured to detect the light of the third split light beam transmitted through the cube, thereby acquiring a scattering image from the surface.