Ultra-wide field of view, broad spectral band helmet visor display optical system
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United States of America Patent
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Mar 12, 1996
Grant Date -
N/A
app pub date -
Oct 1, 1993
filing date -
Oct 1, 1993
priority date (Note) -
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Abstract
An optical display system in which an image is projected onto a combiner surface at a significant bending angle effectively compensates asymmetric aberrations, including quadratic, linear and constant binodal astigmatism components and both linear and constant coma components. Forward and rear optical lens relay groups are positioned between an image generator and the combiner surface. The two relay groups are independently decentered and angularly tilted to increase the degrees of freedom available for aberration compensation. The lenses included in the two relay groups are also designed to compensate for chromatic aberrations, thus allowing for the use of a broad bandwidth combiner and an operating bandwidth that encompasses substantially the full visible spectrum. The reduction in aberrations makes possible a significant increase in the system's field of view.
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