Display system having coma-control plate in relay lens

Details Display system having coma-control plate in relay lens Display system having coma-control plate in relay lens

1987-01-20

1989-05-02

Henry, Jon W.

350447, 350432, G02B 2710, G02B 1318

Patent

active

048262870

ABSTRACT:
A head-up display for use in a vehicle is provided with a curved combiner which reflects an image from a cathode ray tube (CRT) as collimated rays to a viewing site. A relay lens is positioned between the CRT and the combiner to magnify and transfer the image. The combiner may be a partially-reflecting mirror or holographic optical element or dielectric laminate. Included within the relay lens is a coma-control plate having two-dimensional undulations described mathematically by a two-dimensional power series having odd symmetry in a plane of a tilting of the combiner and even symmetry in the perpendicular dimension. The coma-control plate substantially reduces coma in an image presented for viewing at infinity, the coma being introduced by the curvature and off-axis use of a surface of the combiner.

REFERENCES:
patent: 3940204 (1976-02-01), Withrington
patent: 4218111 (1980-08-01), Withrington et al.
patent: 4407564 (1983-10-01), Ellis
patent: 4410241 (1983-10-01), de Lang et al.
patent: 4447128 (1984-05-01), Ferrer
patent: 4669810 (1987-06-01), Wood

Affiliated with

Also associated with

Rating

Display system having coma-control plate in relay lens does not yet have a rating. At this time, there are no reviews or comments for this patent.

If you have personal experience with Display system having coma-control plate in relay lens, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Display system having coma-control plate in relay lens will most certainly appreciate the feedback.

Rate now

Comments { 0 }

Profile ID: LFUS-PAI-O-580989