Patent ID: 7319216

Claim:
An image taking apparatus having an image taking optical system, which catches a subject light coming via the image taking optical system to generate image signals, wherein the image taking apparatus has a light receiving unit comprising: a color separation mirror that separates the subject light coming via the image taking optical system into a reflection subject light of a green wavelength band and transmission subject lights of a red wavelength band and a blue wavelength band; a first imaging device that receives the reflection subject light to generate an image signal for green; and a second imaging device that separately receives the transmission subject lights light into a light of the red wavelength band and a light of the blue wavelength band to generate an image signal for red and an image signal for blue, wherein the image taking apparatus further comprises a focusing device that performs a focusing control for the image taking optical system in accordance with the image signal obtained by the first imaging device, and wherein the focusing device performs the focus control according to a single color.