Reflection mirror for reflecting visible rays and for transmitti

Details Reflection mirror for reflecting visible rays and for transmitti Reflection mirror for reflecting visible rays and for transmitti

1988-03-21

1989-07-25

Arnold, Bruce Y.

350166, G02B 526

Patent

active

048506613

ABSTRACT:
A reflection mirror includes a first interference filter layer arranged on one surface of a light permeable base for reflecting a large quantity of visible rays radiated from a light source and for transmitting a large quantity of infrared rays from the light source, a second interference filter layer arranged on the other surface of the base for transmitting a large amount of the infrared rays transmitting by the first intereference filter layer and for reflecting a large amount of the visible rays transmitted by the first interference filter layer toward the first interference filter layer. The infrared ray reflectance of the first interference filter layer is different from that of the second interference filter layer to increase the quantity of the infrared rays transmitted by the mirror through the second interference filter layer by a repeating reflection between the first and the second interference filter layers.

REFERENCES:
Schroeder, H. H. et al., "A Commercial Cold Reflector", Journal of the SMPTE, vol. 69, No. 5, May. 1960, pp. 351-354.

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