Endoscope system having light intensity adjustment with movable optical system

摘要

An endoscope system includes an optical transmission section that is provided in an endoscope inserted into an interior of a subject and transmits illuminating light to a distal end, a light source section that generates light, a first lens section that receives the light, from the light source section and emits the light with characteristics of different spatial intensity distributions, a second lens section that causes the light emitted from the first lens section to enter the proximal end of the optical transmission section, a distance adjusting section that can adjust a distance, and a control section that controls the distance adjusting section that adjusts the distance between the first lens section and the second lens section so that amounts of the light of a first and second wavelength bands have a predetermined ratio of amount of light.

主权项

1. An endoscope system comprising:
an optical transmission section that is provided in an endoscope inserted into an interior of a subject, transmits illuminating light incident on a proximal end to a distal end and emits the illuminating light from the distal end to illuminate the interior of the subject; a light source section that generates light of a first wavelength band and light of a second wavelength band which is different from the light of the first wavelength band as the illuminating light for illuminating the interior of the subject; a first lens section that receives, as incident light, the light of the first wavelength band and the light of the second wavelength band generated by the light source section and emits the light with characteristics of different spatial intensity distributions in accordance with wavelengths; a second lens section that is provided opposite to the first lens section, receives, as incident light, at least part of the light emitted from the first lens section and causes the received light to enter the proximal end of the optical transmission section; a distance adjusting section that can adjust a distance between the first lens section and the second lens section; and a controller configured to control the distance adjusting section that adjusts the distance between the first lens section and the second lens section so that an amount of the light of the first wavelength band and an amount of the light of the second wavelength band emitted into the interior of the subject have a predetermined ratio of amount of light.