Project Title:

Multiple Wavelength Large Holographic Mirror

94-1	08.03	1774		

Multiple Wavelength Large Holographic Mirror

Abstract:

Large size, multiple wavelength response, holographic mirrors 
have definitive advantages for use as the primary scanning mirror 
in a Lidar system. The difficulty in producing these holographic 
mirrors can be alleviated by two novel techniques. With one 
technique, multiplexed HOEs will be produced without the inherent 
low efficiency characteristic of holograms multiply recorded in 
the same film. This technique is based on the recording of a 
single grating in individual films and on "transferring" these 
layers successively to form a stack of holograms which are 
physically fused to adjacent layers without the aid of coupling 
fluids or adhesives. Additionally, this approach will facilitate 
the individual tuning of each hologram independently and prior to 
the assembly of the pseudomultiplexed holographic mirror. 
Another innovation addresses the need of achieving spectral 
hologram response in regions where laser light sources and 
holographic film sensitivity is not yet available. The approach 
uses vapor deposition for the diffusion of bulk material into the 
polymer matrix of commercially available holographic 
photopolymers to modify the polymeric chains. Post-image 
processing has produced visible and NIR holograms and the 
technique can be adapted as a pre-exposure process for producing 
UV responsive holograms. 

Both large spherical holographic mirrors and high efficiency 
multiplexed holographic mirrors will enhance holographic 
applications and holographic products. 
A partial list of products includes lidar systems and laser based 
optical systems, color responsive HOEs for Head-Up and helmet 
mounted displays, color holographic displays, filters for 
multiple laser frequency detector and eye protection and products 
requiring high efficiency multiplexing and/or large size HOEs. 

Key Words

Holographic Optics, Inc.
358 Saw Mill River Road
Millwood, NY 10546