An Interference-Filter Monochromator System for the Irradiation of Biological Material

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Abstract
The design of a small compact interference-filter monochromator system for the spectral range from 365 to 800 m[mu] is presented, together with a theoretical discussion of optical principles. The characteristics of interference filters and supplemental gelatin and aqueous filters are given. The monochromator has a resolution of about 10 m[mu] throughout the visible spectrum and can produce relatively high irradiances with an incandescent lamp. Irradiances as high as 2000 [mu]w/cm2 can be secured with a larger unit employing a 7-kw carbon arc.