Moll Thermopile of Radiometric Use

Abstract

Moll's thermopile of "small surface pattern" made by Cambridge Sci. Inst. Co. was tested in our laboratory. Its direction characteristics peculiarly deviate from cosine law, for active elements are arranged in straight line, not having point-symmetry against its window, and moreover conical reflector makes the sensibility more directive. Several test-results about reflector are also described.