| 摘要 |
<p>A heat mirror film (12) for placement on a lamp envelope (10) in the form of an etalon or Fan-Bachner heat mirror. At least one of the layers of dielectric material of the heat mirror (12) is fabricated from a material having a non-constant index of refraction which index decreases significantly as infrared radiation frequencies are approached, thus increasing reflection at infrared frequencies as compared to a dielectric having a constant index of refraction. Such dielectrics may include semiconductors, such as indium tin oxide and heavily doped lanthanum hexaboride.</p> |
