| 摘要 |
<p><P>PROBLEM TO BE SOLVED: To provide a two-plate imaging system which has a size and a quality to allow mounting to the top of an endoscope, has a spectroscopic design to suppress color shading with a simple prism maintained, is good in environment resistance and assemblage and favorable in cost performance for a solid photographic element. <P>SOLUTION: The system comprises: a prism group 4, 5 having a color separation coating for reflecting green light; a first solid photographing element 2 for photographing the reflection light from the color separation coating; and a second solid photographing element 3 having an on-chip filter of red transmission and blue transmission for photographing the transmission light from the color separation coating; wherein the system satisfies conditions in respect to the wavelengths at the blue and red boundary sides in the spectral transmittance of the color separation coating, a wavelength at the boundary with green in spectral sensitivity of a picture element having a blue transmission on-chip filter of the second solid photographing element, and a wavelength at the boundary with green in spectral sensitivity of a picture element having a red transmission on-chip filter. <P>COPYRIGHT: (C)2007,JPO&INPIT</p> |
