High-efficiency, low-glare X-prism

Details High-efficiency, low-glare X-prism High-efficiency, low-glare X-prism

1991-06-26

1993-09-14

Lerner, Martin

Optical: systems and elements

Polarization without modulation

By relatively adjustable superimposed or in series polarizers

359583, 359629, G02B 530, G02B 2728

Patent

active

052454720

ABSTRACT:
A high efficiency x-prism beamsplitter for use in such applications as helmet mounted visor displays. By using polarization-sensitive dielectric coatings arranged along with half-wave plates, the x-prism can theoretically deliver 50% illumination to each eye with no loss. In addition to the higher efficiency, the glare throughput found in conventional x-prisms can be theoretically reduced to zero.

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patent: 4973132 (1990-11-01), McDonald et al.
patent: 5074645 (1991-12-01), Gold et al.

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