Polarization preserving reflector and method

Details Polarization preserving reflector and method Polarization preserving reflector and method

1987-10-15

1988-05-24

Punter, William H.

Electric heating

Microwave heating

Tunnel furnace

219121LQ, 350164, G02B 2728, G02B 110, B23K 900

Patent

active

047462027

ABSTRACT:
A polarization preserving reflector for reflecting an incident beam of monochromatic radiation, said beam having a polarization configuration and an angle of incidence. The polarization preserving reflector comprises a substrate; a highly reflective layer positioned adjacent to said substrate; and at least two thin film optical layers one of which being positioned adjacent to the highly reflective layer, one of the thin film optical layers having a high refractive index and another having a low refractive index, for maintaining the incident polarization configuration while producing a high reflectance upon reflection of the beam therefrom in a wide range of the angle of incidence from approximately zero degrees to 75 degrees.

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Dobrowolski, J. A., "Completely Automatic Synthesis of Optical Thin Film Systems", App. Optics vol. 4, 8-1965, pp. 937-946.
Southwell, W. H., "Multilayer Coating Design Achieving a Broad Band 90.degree. Phase Shift", App. Optics vol. 19, 8-15-80, pp. 2688-2692.
Varo, "Reflective Optics by the Replica Process", Advertisement from Varo Inc., Garland, Texas, 1963.
Single-Reflection Film-Substrate Half-Wave Retarders with Nearly Stationary Reflection Properties Over a Wide Range of Incidence Angles, J. Opt. Soc. AM/vol. 73, No. 2/Feb. 1983 (R. M. A. Azzam & M. Emdadur Rahman Khan).

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