Patent ID: 9578293
Date: 2017-02-21
CPC Classifications: A61B,G02B,H04N,H05B

Claim:
1. An endoscope system comprising: a complementary color type imaging device from which a first mixed pixel and a second mixed pixel are read out, each of said first mixed pixel and said second mixed pixel sensing both of first narrowband light having a center wavelength in a blue or violet wavelength range and second narrowband light having a center wavelength in a green wavelength range; a signal processing unit for imaging said first narrowband light by using a signal value of said first mixed pixel, and imaging said second narrowband light by using a signal value of said second mixed pixel; and a lighting section having a light source device for simultaneously applying said first and second narrowband light to an observation object, said light source device setting a light amount ratio between said first narrowband light and said second narrowband light such that the light amount of said first narrowband light is made larger than the light amount of said second narrowband light and said signal value of said second mixed pixel is made higher than said signal value of said first mixed pixel, wherein said light amount ratio is set at a value “Z” satisfying expression (a) as follows: wherein, S