Patent ID: 7988338

Claim:
An optical transformation device, more particularly a light shape transformation device able to transform the light from a spot light source and produce a rectangular projection surface, wherein: the transformation device is a refracting body, and the refracting body is provided with an incident surface and an emergent surface, wherein the incident surface is a concave spherical surface, and the emergent surface is formed from a combination of a plurality of optical surfaces, the combination of a plurality of the optical surfaces comprises: a refracting surface, the optical axis of the refracting surface coincides with the working optical axis of the concave spherical surface; two optical curved surfaces, configured to join with the surface edge lines along the meridian direction of the refracting surface, the extended point of intersection of the two axis is positioned in the direction of the incident surface, and intersects on the working optical axis; two reflecting surfaces, located at two side positions of the associated meridian of the emergent surface, and which are angularly adjoined to two sides of the refracting surface.