Method for preparing a holographic optical element to transfer low-aberration and low-distortion images

Abstract

A method of preparing a hologram that is a holographic optical element to transfer low-abberation and low-distortion images using a coherent light reference beam emanating from an ordinary projection lens and a coherent light object beam emanating from a high quality low-abberation and low-distortion lens.

1 . A method of preparing a hologram that is a holographic optical element to transfer low-abberation and low-distortion images, said method comprising the steps of: 
 a) passing coherent light emanating from a laser through a first diffusing screen and further passing the resulting scattered coherent light through a ordinary projection lens that neither magnifies nor demagnifies, wherein the resulting coherent light becomes the reference beam;    b) passing coherent light emanating from the same laser through a second diffusing screen and further passing the resulting scattered coherent light through a high quality lens system specially designed to be abberation and distortion free, wherein the resulting coherent light becomes the object beam; and,    c) exposing the a photographic plate with both reference and object beams to produce the hologram.    
   
   
       2 . The method of  claim 1  wherein the reference and object beam impinge upon opposite sides of a transparent photographic plate to expose the hologram.  
   
   
       3 . The method of  claim 1  wherein the reference and object beam impinge upon the same side of a photographic plate to expose the hologram.  
   
   
       4 . The method of  claim 3  wherein the reference and object beam impinge upon the emulsion side of a photographic plate to expose the hologram.  
   
   
       5 . The method of  claim 4  wherein the side of the photographic plate that is opposite to the emulsion is a non-transparent reflective surface.  
   
   
       6 . The method of  claim 1  wherein the hologram is a reflection hologram.  
   
   
       7 . The method of  claim 1  wherein the hologram is a transmission hologram.  
   
   
       8 . The method of  claim 1  wherein the hologram is a surface hologram.  
   
   
       9 . The method of  claim 1  wherein the hologram is a volume hologram.