Optical filters on linear halogen-lamps prepared by dip-coating
Spectral intensity distributions of linear incandescent lamps are tailored to special applications by means of reflecting as well as absorbing multilayer filters. A dip-coating technique is used for deposition of films on the outside of tubular lamp envelopes. Film thickness homogeneity is within &l...
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| Published in: | Journal of non-crystalline solids Vol. 218; pp. 347 - 353 |
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| Main Authors: | , , , , |
| Format: | Journal Article |
| Language: | English |
| Published: |
Elsevier B.V
01-09-1997
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| Online Access: | Get full text |
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| Summary: | Spectral intensity distributions of linear incandescent lamps are tailored to special applications by means of reflecting as well as absorbing multilayer filters. A dip-coating technique is used for deposition of films on the outside of tubular lamp envelopes. Film thickness homogeneity is within < 3%. With this technique a variety of high refractory oxides can be used. Coatings on quartz-glass are investigated. SiO
2 is used for layers of low refractive index, oxides of Ti, Hf, Zr, Nb, Ta and their mixtures are used for layers of high refractive index and Fe
2O
3 for absorbing layers. Infrared reflecting filters for use up to 1000°C and of about 8 μm total thickness are prepared by using TiO
2 · Ta
2O
5 as high index material. Lamps with these coatings are produced for process heating, for lighting and for personal warming at reduced glare. |
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| ISSN: | 0022-3093 1873-4812 |
| DOI: | 10.1016/S0022-3093(97)00169-5 |