PURPOSE:To obtain a full color picture image signal sensor having high reproducibility of output and high response speed, by arranging photo receiving units having photoelectric conversion function which units are formed by supporting an orientation film of photosensitive chromoprotein on an electrode, and combining photo receiving units wherein the photosensitive wavelengths of photosensitive chromoproteins are different. CONSTITUTION:A blue-sensitive, a green-sensitive, and a red-sensitive chromoprotein thin films 4, 5, and 6 are formed on a transparent supporting body 1, via active electrodes. As the photosensitive chromoprotein, the following rhodopsin family are quoted; visual pigment rhodopsin, bacteriorhodopsin, halorhodopsin, phoborhodopsin and arckrhodopsin. As the light receiving chromoprotein for a color picture image sensor, two or more kinds of chromoprotein whose light sensitive wavelengths are different may be selected in response to the constitution of a desired photo sensor. The first group of bacteriorhodopsin isomer having different absorption wavelength can be obtained by substituting a retinal equivant for a chromosphere retinal. The second group can be obtained by partially modifying the arrangement of protein part,i.e., amino acid of opsin.
COLOR PICTURE IMAGE SENSOR