| 摘要 |
PURPOSE:To obtain a three-dimensional video field whose form varies according to an angle of view, by generating a prescribed-level signal at some part, where no light is supplied from a lens system, of the photoelectric surface of an image pickup tube. CONSTITUTION:A compound lens 2 arranged on the front surface of an image pickup tube 1 consists of a lens 2a having a flat surface on an object side and semicylindrical parts vertically corresponding to segments as of the image pickup tube 1, and a lens 2b provided between the lens 2a and image pickup tube 1 and having semicylindrical parts horizontally on both sides. Light supplied to the lens 2b as a parallel beam converges to a focal point Fb and is supplied to a photoelectric surface 1a constituting each segment as of the image pickup tube 1 and a part which corresponds to the color filter part ac of an optical filter 1c, forming an inverted image there. |
