| 摘要 |
<p>When illumination light in ultraviolet region and visible light region is emitted from a light source lamp (31), quantity of the illumination light is regulated by a first diaphragm mechanism (33) and a second diaphragm mechanism (34) before an observation object is irradiated sequentially with the illumination light through a rotary filter (35). Fluorescence and RGB reflection light from the observation object are picked up by means of a pick-up unit (12) at an endoscope inserting portion (10a), and a fluorescent image and a normal image formed by an image processing unit (51) are displayed on a monitor (100). The first diaphragm mechanism (33) regulates the quantity of exciting light and RGB light in the wavelength band of illumination light, and the second diaphragm mechanism (34) exhibiting transmissibility to light in ultraviolet region regulates the quantity of RGB light without having any effect on the quantity of exciting light. Consequently, optimal balance of brightness can be attained by controlling the quantities of both exciting light and RGB light emitted from one light source lamp.</p> |
