| 摘要 |
PURPOSE:To obtain a satisfactory color TV signal which will not generate chrominance component disturbance by providing an optical low-pass filter having attenuation polar frequency in the vicinity of modulation chrominance component frequency and in the vicinity of 1.5 times said frequency in an optical path of an image-forming optical system. CONSTITUTION:Incident light from a object is focused by a lens 21 and image- formed on a solid image pickup element 16. Between the lens 21 and the solid image pickup element 16, optical low-pass filters 18-20 are provided. The object image focused by the lens 21 becomes a duplex image since a frequency component corresponding to a separation band is attenuated by a birefringence crystal plate 19. The object image which has received light is corrected by a phase shifting plate 20. The object image which has become a duplex image is made into a quadruplex image since a frequency component corresponding to a separation band is attenuated by a complex refraction crystal plate 18, and is space- modulated by a color filter 17, thereby image-forming on the solid image pickup element 16. |
