Multilayer infrared reflecting optical body

Details Multilayer infrared reflecting optical body Multilayer infrared reflecting optical body

1998-01-13

2000-04-11

Henry, Jon

Optical: systems and elements

Having significant infrared or ultraviolet property

Multilayer filter or multilayer reflector

359584, 359589, 359590, G02B 528, G02B 522

Patent

active

060494190

ABSTRACT:
An optical body comprising (a) a dielectric multilayer film having a reflecting band positioned to reflect infrared radiation of at least one polarization at an incident angle normal to the film, said reflecting band having a short wavelength bandedge .lambda..sub.a0 and long wavelength bandedge .lambda..sub.b0 at a normal incident angle, and a short wavelength bandedge .lambda..sub.a.theta. and long wavelength bandedge .lambda..sub.b.theta. at a maximum usage angle .theta., wherein .theta..sub.a.theta. is less than .lambda..sub.a0 and .lambda..sub.a0 is selectively positioned at a wavelength greater than about 700 nm; and (b) at least one component which at least partially absorbs or reflects radiation in the wavelength region between .lambda..sub.a.theta. and .lambda..sub.a0 at a normal angle of incidence.

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