Electronic endoscope system and light source for endoscope

摘要

An electronic endoscope system includes a light source that emits light having a visible light wavelength region, and an optical filter that has transmission peaks at least at two particular wavelengths in a continuous wavelength region including the visible light wavelength region. The optical filter has a transmissivity that suppresses a light amount cut by the optical filter between the transmission peaks of the at least two particular wavelengths and has a transmissivity of zero at a wavelength region other than an interval between the transmission peaks of the at least two particular wavelengths. A solid-state image pick-up receives reflected light from an object which is irradiated with illumination light via the optical filter and an image generator is configured to generate a color image to be displayed on a monitor by processing an image signal output by the solid-state image pick-up.

主权项

1. An electronic endoscope system, comprising:
a light source that emits light having a visible light wavelength region; an optical filter that has transmission peaks at least at two particular wavelengths in a continuous wavelength region including the visible light wavelength region and has a transmissivity defined to suppress a light amount cut by the optical filter between the transmission peaks of the at least two particular wavelengths, the optical filter having a transmissivity of zero at a wavelength region other than an interval between the transmission peaks of the at least two particular wavelengths and a lower limit of the transmissivity of the optical filter between the transmission peaks is higher than or equal to 5% of each transmission peak, and an upper limit of the transmissivity of the optical filter between the transmission peaks, is lower than or equal to 10% of each transmission peak; a solid-state image pick-up that receives reflected light from an object which is irradiated with illumination light via the optical filter; and an image generator configured to generate a color image to be displayed on a monitor by processing an image signal output by the solid-state image pick-up.