摘要:
A color separation optical system for a color television camera of relay lens type in which a set of color separating optical elements are provided between a single first relay lens and three second relay lenses for three primary colors. The first relay lens is located substantially on the image plane of the taking lens of the television camera. A field lens is provided between the taking lens and the first relay lens. The power of the field lens is determined according to the focal length of the taking lens. The field lens is removed when the exit pupil of the taking lens is registered with the entrance pupil of the first relay lens. In this case, the first relay lens is axially moved toward the taking lens to make the front focal plane of the first relay lens registered with the image plane of the taking lens. The axial movement of the first relay lens is conducted by means of a mechanism which is operable from outside of the television camera.
摘要:
In a color television camera, a color separation optical system includes a first relay lens behind a taking lens of the camera, color separation optical elements such as prism blocks or dichroic mirrors, and a set of second relay lenses. Image pick-up tubes for three colors are provided behind the second relay lenses. The pick-up tubes are mounted in coil assemblies. Each coil assembly is provided with a rotating device for conducting a position adjustment of the tube with respect to the associated second relay lens to make perfect registration between images of the three tubes. A focus adjusting device for conducting a focus adjustment between each second relay lens and the associated image pick-up tube is provided in each second relay lens. The focus adjusting devices are operable from outside the camera for sliding the second relay lenses in the direction of their optical axes.
摘要:
A solid image pickup element is adhesively attached via a spacer to the light leaving end of a color separation prism which is employed in a television camera to separate the light of an object from an optical lens system into a plurality of wavelength band components. The spacer has at least one surface to be engaged with either the color separation prism or the solid image pickup element, and the engagement surface is inclined relative to the light leaving optical axis of the prism. Therefore, a single spacer can be satisfactorily utilized for different clearances between the prism and the solid image pickup element.