The requirements of window materials for recent forms of photo-conductive cells are discussed and various substances considered. Artificially grown sapphire is found to be a suitable material and one that is readily available. A method for sealing sapphire to glass is described.
No takes yet. Share an insight, caveat, or question.
Chasmar et al. (1951) studied this question.
Synapse has enriched one closely related paper. Consider it for comparative context: