Patent ID: 6277297
Filing Date: 2001-08-21
Classification: C30B,G02B,Y10S

Abstract:
A composition of matter for use as an optical window which:(a) consists essentially of a compound taken from the class consisting of group III-V compounds;(b) has not more than about 1 part per million impurities; and(c) has less than about 1.times.10.sup.15 atoms/cc carbon;(d) said group III-V compound being doped with a dopant element taken from the class consisting of shallow donors;(e) said composition of matter for use as an optical window being transmissive to infrared frequencies in the range of from about 1 micron to about 14 microns and being relatively opaque to substantially all frequencies above about 14 microns and from about 1 micron to about x-ray frequencies.