Optical: systems and elements – Holographic system or element – Head up display
Patent
1995-06-07
1997-12-02
Dzierzynski, Paul M.
Optical: systems and elements
Holographic system or element
Head up display
359 1, 359567, 359576, 359630, G03H 100, G02B 518, G02B 2714
Patent
active
056942303
ABSTRACT:
A combiner for combining light traveling on two optical paths to permit coincident viewing of the light includes a light-transmissive substrate having first and second surfaces, the first surface having a first diffractive structure that is a computer-generated hologram formed thereon configured to correct aberrations in light travelling on the first optical path which may be incident on the first surface and a partially reflective coating on the first diffractive structure, the partially reflective coating being reflective in a narrow bandwidth only, the first diffractive structure and the partially reflective coating configured to provide corrected reflection to light travelling on the first optical path, the second surface having a second diffractive structure that is a computer-generated hologram formed thereon as a conjugate of the first diffractive structure, so that light travelling on a second optical path which may be incident on the second surface passes through the second and first diffractive structures with substantially no net affect, whereby a viewer may look at the first surface and see the corrected reflection of the light travelling on the first optical path combined with the substantially unaffected light travelling on the second optical path.
REFERENCES:
patent: 4688879 (1987-08-01), Fairchild
patent: 4895790 (1990-01-01), Swanson
patent: 4900133 (1990-02-01), Berman
patent: 4902100 (1990-02-01), Reynolds et al.
patent: 4934792 (1990-06-01), Tovi
patent: 4981332 (1991-01-01), Smith
patent: 5119231 (1992-06-01), Nelson et al.
patent: 5153751 (1992-10-01), Ishikawa et al.
patent: 5161059 (1992-11-01), Swanson et al.
patent: 5162927 (1992-11-01), Moss et al.
patent: 5218471 (1993-06-01), Swanson et al.
patent: 5257094 (1993-10-01), LaRussa
patent: 5455129 (1995-10-01), Bussard
Use Of "X Prism" Concept article; undated--admitted prior art.
Digital Optics Corp.
Dzierzynski Paul M.
Schuberg Darren E.
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