Optical device for helmet visor comprising aspheric mirror
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United States of America Patent
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-
Jan 7, 2003
Grant Date -
N/A
app pub date -
Feb 1, 2000
filing date -
Aug 1, 1997
priority date (Note) -
Expired
status (Latency Note)
Importance
Abstract
The invention relates to an optical device for a system for presenting collimated images including an off-axis spherical mirror. The device has an additional aspherical mirror whose surface forms, in the plane of symmetry of the unfolded optical system, a curve whose radius of curvature is variable. The surface provides for correction of the image of a pupil of an eye given by the spherical mirror and the pupil image is rectified on the optical axis. The surface may be a paraboloid, an ellipsoid and it may exhibit symmetry of revolution.
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Family
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