It is shown that sufficient progress in the design and manufacture of thin film interference filters has been made to consider the construction of filters with the rather complicated spectral characteristics necessary for the adjustment of the spectral response and spectral power distributions. By way of example, the calculated and experimental performance of filters for changing the color temperature of a light source and for duplicating the color mixture functions of the CIE standard observer are given. Other examples discussed are filters for obtaining a uniform spectral response of optical systems consisting of a light source and a monochromator, with or without a detector.
A fast automatic synthesis program based on interference minus filters is described. It yields the parameters of a number of individual filters that together match any desired spectral transmittance curve, providing that the spectral range over which the latter is defined is not excessive. It is shown that in practice many of these components can be combined without significantly affecting the performance. When used alone, the program may yield solutions consisting of a large number of layers. It is demonstrated that far fewer layers are needed if intermediate solutions obtained with this program are refined using other automatic synthesis programs. The program is illustrated by a number of rather difficult hypothetical problems.
Chuck Carniglia was an industrial scientist, an educator, and a friend to all he met. He had an important impact on the optical thin-film community. This article highlights his career and accomplishments.
Some organizational aspects of the Second OSA Topical Meeting on Optical Interference Coatings held in June 1980 at Oakland, Calif., are briefly described.
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