Patent ID: 7626154

Claim:
An imaging device, comprising: an imaging optical system with an optical low-pass filter having predetermined frequency characteristics; color filters that separate an imaging light passed through the imaging optical system into predetermined color components; an image sensor that photoelectrically converts the imaging light passed through the color filters to generate pixel signals; and an output image signal generating unit that generates output image signals based on the pixel signals obtained from the image sensor, wherein the frequency characteristics of the optical low-pass filter are set in such a way that a first false color passing ratio is not higher than a specified value, the first false color passing ratio indicating the ratio of frequency components allowed to pass through in a frequency component region not lower than the Nyquist frequency for the lowest sampling frequency among sampling frequencies in the longitudinal, lateral, and oblique directions for each color component in the image sensor, and lower than the Nyquist frequency for the sampling frequency of the image sensor, and the output image signals are generated from the pixel signals generated by the image sensor so that N pixel signals (N is a real number of 2 or above) generated by the image sensor correspond to one output image signal.