Heat rays reflecting film

Details Heat rays reflecting film Heat rays reflecting film

1982-04-28

1984-07-24

Arnold, Bruce Y.

350166, G02B 522, G02B 528

Patent

active

044615329

ABSTRACT:
A heat rays reflecting film composed of dielectric thin layers (n.sub.H layers) having a relatively high refractive index and dielectric thin layers (n.sub.L layers) having a relatively low refractive index which are alternately piled on one another, is disclosed. The first layer of the heat rays reflecting film, which contacts with the air is n.sub.L layer and the undermost layer which contacts with the window glass is n.sub.H layer. The optical thickness of the first layer is less than .lambda./4 while that of the other layers is .lambda./4. And the thickness of each layer is expressed by the formula: optical thickness
v wherein nv is the refractive index for visible rays.

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Zdenek Knittl, Optics of Thin Films, 1976, pp. 152-153.
Elmar Ritter, Optical Film Materials and Their Applications, Applied Optics, vol. 15, No. 10, Oct. 1976, pp. 2318-2327.

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