Design configurations for a 45° field magnifier are investigated systematically. A hybrid surface is essential. Stray light effects due to surface microstructure are considered. A demonstration unit with 8μm features is described.
This paper will describe and discuss the head up display analysis routines that are used in the Thales Optics optical design software and how these have been enhanced and supplemented to meet the requirements of modern avionics specifications. Specific examples will be given illustrating methods of presenting collimation errors, binocular disparity, field of view, pupil shape and aperture definition on specific surfaces. Some of the methods of presenting collimation errors lend themselves to differential analysis making them useful for considering manufacturing tolerances.
Rugate technology is a powerful and flexible technique, particularly suited to Head-Up Display, HUD combiners and display visors. The thin film coating, applied to a combiner surface, reflects the symbology from a HUD, while simultaneously allowing a clear view through the combiner to the outside world. The coating is colour selective, only reflecting a narrow band of green coincident with the P53 display phosphor. It exhibits major advantages compared to other HUD technologies. Namely, reflects only CRT wavelengths, transmits the outside world with high efficiency and minimal colouration, has high photopic transmission, displays brightness insensitive to head movement, has wide angular response, weighs approximately half that of equivalent holographic combiners and offers a lower cost solution.
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