Patent ID: 9417376
Filing Date: 2016-08-16
CPC Classification: G02B

Claim Text:
1. An optical system, comprising: a light guide having a major surface adapted to emit light; a first light source configured to inject light into the light guide along a first direction; and an optical film having opposed first and second structured surfaces, the first structured surface having a plurality of extended prisms formed therein, and the second structured surface having a plurality of extended lenslets formed therein, the prisms and lenslets being arranged in a one-to-one correspondence of lenslets to prisms; and wherein the optical film is disposed proximate the light guide and oriented so that light emitted from the major surface of the light guide enters the optical film through the first structured surface and exits the second structured surface of the optical film, the light exiting the optical film forming a first output beam when the first light source is energized; and wherein the first output beam has a first intensity distribution as a function of angle θ, the first intensity distribution being characterized by a first left beam edge at an angle θ wherein the first left beam edge has a sharpness characterized by a transition angle Δθ wherein Δθ