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