3-in.-diameter high-efficiency diffractive corrector for head-up display

Shamuel Blit; Boris Kobrin; Y. Malkin

doi:10.1117/12.211213

6 June 1995 3-in.-diameter high-efficiency diffractive corrector for head-up display

Shamuel Blit, Boris Kobrin, Y. Malkin

Proceedings Volume 2426, 9th Meeting on Optical Engineering in Israel; (1995) https://doi.org/10.1117/12.211213
Event: Optical Engineering in Israel: 9th Meeting, 1994, Tel-Aviv, Israel

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.

Citation Download Citation

Shamuel Blit, Boris Kobrin, and Y. Malkin "3-in.-diameter high-efficiency diffractive corrector for head-up display", Proc. SPIE 2426, 9th Meeting on Optical Engineering in Israel, (6 June 1995); https://doi.org/10.1117/12.211213

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