Optical system and its display system

Abstract

An optical system for aberration compensation comprising an optical module and an asymmetric refractive index distribution film is disclosed. The asymmetric refractive index distribution film comprises a liquid crystal and a liquid crystalline polymer, wherein the asymmetric refractive index distribution film set on an out-light surface or an in-light surface of the optical module. A display system comprising the above-mentioned optical system and an image panel are also disclosed herein. The asymmetric refractive index distribution film of the present invention has non-uniform refractive index distribution so as to effectively compensate the aberration formed by the optical module.

What is claimed is: 
     
         1 . An optical system with an aberration compensation function, comprising:
 an optical module, comprising a curved surface; and   a refractive index distribution film comprising a liquid crystal and a liquid crystalline polymer, wherein a refractive index distribution of the refractive index distribution film is asymmetric and the tilt angle of the liquid crystal of the refractive index distribution film is fixed; the refractive index distribution film is arranged on a first side or a second side of the optical module; and the refractive index distribution film is utilized to compensate the aberration generated by the optical module.   
     
     
         2 . The optical system according to  claim 1 , wherein the optical module comprises a lens or a curved reflector. 
     
     
         3 . The optical system according to  claim 1 , wherein the optical module comprises a free form lens. 
     
     
         4 . The optical system according to  claim 1 , wherein the optical module comprises a free form lens and a see-through corrector; the first side is a light entrance surface of the free form lens; the second side is a light exit surface of the free form lens; the see-through corrector is attached on a third side of the free form lens; and an incident light passes through the free form lens from the first side, and the incident light is reflected by the second side and the third side to pass through the second side of the free form lens. 
     
     
         5 . The optical system according to  claim 1 , wherein the optical module comprises a lens and a beam splitter; the lens is set on a light entrance side of the beam splitter; and the first side is a light entrance surface or a light exit surface of the lens; and the second side is a light entrance surface or a light exit surface of the beam splitter. 
     
     
         6 . The optical system according to  claim 1 , wherein the optical module comprises a lens and a reflector; the lens is set on a light entrance side of the reflector; the first side is a light entrance surface or a light exit surface of the lens; the second side is a light entrance surface or a light exit surface of the reflector. 
     
     
         7 . The optical system according to  claim 1 , wherein the optical module comprises a curved reflector array; and the refractive index distribution film is set on a light entrance side or a light exit side of the curved reflector array. 
     
     
         8 . The optical system according to  claim 1 , wherein the refractive index distribution film is flexible. 
     
     
         9 . The optical system according to  claim 1 , wherein the refractive index distribution film is directly adhered on the first side or the second side of the optical module. 
     
     
         10 . A display system with an aberration compensation function, comprising:
 an optical system, comprising:
 an optical module, comprising a curved surface; and 
 a refractive index distribution film comprising a liquid crystal and a liquid crystalline polymer, wherein a refractive index distribution of the refractive index distribution film is asymmetric and the tilt angle of the liquid crystal of the refractive index distribution film is fixed; the refractive index distribution film is arranged on a first side or a second side of the optical module; and the refractive index distribution film is utilized to compensate the aberration generated by the optical module; 
   an image panel for displaying an image, wherein the image panel set on a light entrance side of the optical system, and the image light projected from the image panel passes through the optical system to a viewer's eyes.   
     
     
         11 . The display system according to  claim 10 , wherein the optical module comprises a lens or a curved reflector. 
     
     
         12 . The display system according to  claim 10 , wherein the optical module comprises a free form lens. 
     
     
         13 . The display system according to  claim 10 , wherein the optical module comprises a free form lens and a see-through corrector; the first side is a light entrance surface of the free form lens; the second side is a light exit surface of the free form lens; the see-through corrector is attached on a third side of the free form lens; and the image light projected from the image panel passes through the free form lens from the first side, and the image light is reflected by the second side and the third side to pass through the second side of the free form lens into the viewer's eyes. 
     
     
         14 . The display system according to  claim 10 , wherein the optical module comprises a lens and a beam splitter; the lens is set on a light entrance side of the beam splitter; the first side is a light entrance surface or a light exit surface of the lens; and the second side is a light entrance surface or a light exit surface of the beam splitter; and the image light projected from the image panel passes through the refractive index distribution film, the lens, and the beam splitter to reflect into the viewer's eyes. 
     
     
         15 . The display system according to  claim 10 , wherein the optical module comprises a lens and a reflector; the lens is set on a light entrance side of the reflector; and the first side is a light entrance surface or a light exit surface of the lens; the second side is a light entrance surface or a light exit surface of the reflector; and the image light projected from the image panel passes through the refractive index distribution film, the lens, and the reflector to reflect into the viewer's eyes. 
     
     
         16 . The display system according to  claim 10 , wherein the optical module comprises a curved reflector array; and the refractive index distribution film is attached on the first side or the second side of the lens; and the image light projected from the image panel passes through the refractive index distribution film, the curved reflector array to reflect into the viewer's eyes. 
     
     
         17 . The display system according to  claim 10 , wherein the refractive index distribution film is flexible. 
     
     
         18 . The display system according to  claim 10 , wherein the refractive index distribution film is directly adhered on the first side or the second side of the optical module.