Interference Photo Cathodes, T419-J203.
Abstract
Incident-light interference cathodes composed of S 20 layer, dielectric intermediate layer and silver reflector make it possible in the multi-alkali layer, which only absorbs 20% as a normal cathode, to absorb 75% of the irradiated light energy. The optical absorption increase corresponds to the photoelectric amplification factor. At 720 nm the wavelength for which the adaptation results amounts to the value of the amplification factor 3.7. The cathode does not operate selectively, since the amplification range is 400 nm wide. A comparison between incident-light interference cathodes and reflective cathodes shows that the best amplification in the near I.R. range is to be obtained with the aid of the incident-light interference cathode. (Author)
Document Details
- Document Type
- Technical Report
- Publication Date
- Jan 01, 1969
- Accession Number
- AD0860361