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Proceedings Paper

3-in.-diameter high-efficiency diffractive corrector for head-up display
Author(s): Shamuel Blit; Boris Kobrin; Y. Malkin
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Paper Abstract

A 3' diameter refractive-diffractive element is presented. The element is used as a corrector in the optical system of a head up display at 545 nm. Average grating density of the design was 6 cycles/mm peaking to 10 cycles/mm. A 4 mask 14 level design was utilized, having a theoretical efficiency of 98.3%. The diffractive pattern was etched by RIE on a plano-convex fused silica lens, and then AR coated. Mask design and manufacturing process considerations are given and discussed. Tolerances and fabrication errors are analyzed. Micron mask misalignment and duty cycle errors, etch depth error of +/- 5%, and +/- 6% uniformity were achieved over the entire area, yielding a total efficiency of the element of > 96%. Diffraction measurements were made and compared to the theoretical calculations. The design and fabrication results prove diffractive elements in the visible a viable solution to correct aberrations in high quality optical systems such as head up displays.

Paper Details

Date Published: 6 June 1995
PDF: 7 pages
Proc. SPIE 2426, 9th Meeting on Optical Engineering in Israel, (6 June 1995); doi: 10.1117/12.211213
Show Author Affiliations
Shamuel Blit, Holo-Or Ltd. (Israel)
Boris Kobrin, Holo-Or Ltd. (United States)
Y. Malkin, Holo-Or Ltd. (Israel)


Published in SPIE Proceedings Vol. 2426:
9th Meeting on Optical Engineering in Israel

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