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United States Patent | 4,218,111 |
Withrington , et al. | August 19, 1980 |
There is disclosed an integrated optical design of head-up displays suitable for use in aircraft cockpits and the like. The display system is comprised of a holographic optical element used as the combiner for presenting a direct view of the exterior on which are superimposed image signals generated by a source device such as a cathode ray tube and transmitted to the combiner through an optical system including a relay lens containing tilted and decentered optical elements to compensate for the aberration present in the holographic optical element. There are further disclosed four relay lens design forms particularly suited for use in the design of such holographic head-up displays. The disclosure includes integrated designs in which (a) the holographic element may or may not be constructed with aberrated wavefront and (b) a beam splitter is incorporated for insertion of a stand-by sight, possibly also being tilted for the correction of aberrations.
Inventors: | Withrington; Roger J. (Los Angeles, CA), Cook; Lacy G. (Hawthorne, CA), Jones; Helene H. (Los Angeles, CA) |
Assignee: |
Hughes Aircraft Company
(Culver City,
CA)
|
Appl. No.: | 05/923,119 |
Filed: | July 10, 1978 |
Current U.S. Class: | 359/13 ; 345/7; 359/19; 359/630; 434/38 |
Current International Class: | G02B 27/01 (20060101); G02B 13/00 (20060101); G02B 27/00 (20060101); G02B 027/00 () |
Field of Search: | 350/193,215,3.65,3.70,3.72,162ZP,174 35/12N 340/705 |
3378326 | April 1968 | Alvarez |
3533104 | October 1970 | Habegger et al. |
3737212 | June 1973 | Antonson et al. |
3807829 | April 1974 | Close |
3885095 | May 1975 | Wolfson et al. |
3915548 | October 1975 | Opittek et al. |
3940204 | February 1976 | Withrington |
3945716 | March 1976 | Kinder |
3949490 | April 1976 | Derderian et al. |
4018512 | April 1977 | Sakai |
"Head-Up Display Concept Under Development," Aviation Week & Space Technology, May 16, 1977, pp. 55-56.. |