INCREASED SENSITIVITY PHOTOCATHODE STRUCTURE

摘要

A photocathode substrate includes a plurality of prisms to refract radiation before it impinges upon a photocathode material. The refraction causes most of the radiation to meet the photocathode material at an angle other than 90 DEG so that internal reflection of the energy within the photocathode material occurs. This greatly enhances the probability of electrons being released from the photocathode material.