Light source device and endoscope system
A light source device and an endoscope technology, applied in the field of endoscope systems, can solve the problems of difficulty in obtaining bright images and inability to obtain images, etc.
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no. 1 approach
[0042] The endoscope system 1 according to the first embodiment of the present invention is capable of narrow-band light observation as special light observation in addition to ordinary light observation. That is, if figure 1 As shown, the endoscope system 1 includes a light source device 20 , a main body 10 , and an endoscope 30 capable of selectively supplying respective illumination lights for ordinary light observation and narrowband light observation. The endoscope 30 has an operation unit 32 , an elongated insertion unit 33 inserted into the digestive canal or the like of a subject, and a universal cable 31 . An imaging optical unit 37 , a CCD 35 that is a field sequential imaging unit, and an illumination optical unit 36 that emits illumination light are arranged in the front end portion 33A of the insertion unit 33 . The illumination light from the light source device 20 is guided to the illumination optical section 36 through the light guide 34 inserted into the i...
no. 2 approach
[0086] Next, an endoscope system 1B according to a second embodiment will be described. The endoscope system 1B of the present embodiment is similar to the endoscope system 1 of the first embodiment, and therefore the same components are assigned the same reference numerals and their descriptions are omitted.
[0087] The endoscope system 1B of the present embodiment can perform fluorescence observation (AFI), which is special light observation, in addition to ordinary light observation. As already explained, in the case of fluorescence observation, the fluorescence image is combined with the image obtained by using green light which is strongly absorbed by hemoglobin, and displayed as a pseudocolor image in which neoplastic lesions and normal mucous membranes are enhanced in different tones in monitor 14. This is based on the characteristic that when irradiated with blue excitation light, autofluorescence (fluorescence emitted by fluorescent substances such as collagen prese...
no. 3 approach
[0093] Next, an endoscope system 1C and a light source device 20C according to the third embodiment will be described. The endoscope system 1C of the present embodiment is similar to the endoscope system 1 and the like of the first embodiment, and therefore the same components are assigned the same reference numerals and descriptions thereof are omitted.
[0094] The endoscope system 1C of the present embodiment is capable of narrow-band light observation (NBI) and fluorescence observation (AFI), which are special light observations, in addition to ordinary light observation (WLI). That is, the endoscope system 1C has both the functions of the endoscope system 1 and the functions of the endoscope system 1B.
[0095] Such as Figure 9 As shown, the first rotary filter unit 23C of the light source device 20C has three filters including a Mg filter on the inner periphery, and three filters 23a1 and 23b1 including a magenta 2 (Mg2) filter on the outer periphery. , 23c1. Further...
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