Infrared-blocking optical fiber

Optical: systems and elements – Having significant infrared or ultraviolet property – Multilayer filter or multilayer reflector

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359360, 359350, 359885, 5253266, F21V 904, G02B 508, G02B 520, C08F 3000

Patent

active

056918380

ABSTRACT:
Disclosed herein is an infrared-blocking optical filter having optical properties that the transmittance to rays in a visible region is excellent while rays in a near infrared region, particularly, in a wavelength range longer than 1200 nm are cut off or attenuated with high efficiency. The infrared-blocking optical filter includes a transparent substrate and either of the following infrared-blocking film (A) and (B) provided on a surface of the transparent substrate. Film (A): an infrared-blocking film formed on a synthetic resin in which fine powder of metal oxide material composed of indium oxide and/or tin oxide is dispersed; and Film (B): an infrared-blocking film formed of a deposit of a metal oxide material composed of indium oxide and/or tin oxide. The infrared-blocking film may be formed on a transparent support member to constitute an infrared-blocking composite film which is provided on a surface of the transparent substrate to form an infrared-blocking optical filter.

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