Diffractive waveguide providing structured illumination for object detection

摘要: There is provided a diffractive waveguide device comprising: light source, at least one detector, an SBG comprising multiplicity of separately switchable elements sandwiched between transparent substrate to which electrodes have been applied. The substrates function as guide. Each element encodes image information be projected on surface. when in diffracting state diffracts out the guide form region detector detects scattered from object disposed proximity surface and illuminated by said region.