Night vision device, image intensifier and photomultiplier tube, transfer-electron photocathode for such, and method of making

摘要

A night vision device includes an image intensifier tube having a photocathode responsive to light in the wavelength range extending from about 1 mu m to about 2 mu m. The photocathode releases photoelectrons in response to photons of light in this wavelength range. A photomultiplier tube includes such a photocathode to provide an image in response to light of such a wavelength. A method of making such a photocathode is set out.