Optical beam splitter and electronic high speed camera incorporating it

摘要

An optical beam splitter has an imaging lens assembly 11 with a single optical axis and reflectors 16, 17 located on the image side of the lens to produce a number of real images 20, 21 of an object imaged by the lens. The imaging lens assembly 11 is designed to image the real image formed by a camera lens assembly 23 on the optical axis where the camera lens assembly has an exit pupil a known distance on the object side of this real image. The imaging lens assembly 11 is then adapted to image this exit pupil of the camera lens to an aperture plane 28 adjacent the reflectors. The optical beam splitter is described in particular in an application in an electronic high speed camera wherein multiple images 20, 21 of an object are formed for high speed photography. The images are formed onto electronic shutters 14 and 15 mounted in front of electronic image sensors 12 and 13. IMAGE