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Endoscope system and light source device

A light source device and endoscope technology, applied in the direction of endoscope, image enhancement, instruments, etc., can solve the problems of decreased oxygen saturation measurement accuracy, increased manufacturing cost, and complicated device structure, so as to improve image brightness, Effect of improved measurement accuracy

Active Publication Date: 2013-05-01
FUJIFILM CORP
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  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

If the difference in absorption coefficient decreases as described above, the measurement accuracy of oxygen saturation decreases
[0009] In this regard, Japanese Patent No. 2648494 discloses a countermeasure against insufficient light quantity by expanding the wavelength band for the above-mentioned reference light, but does not disclose the problem of insufficient light quantity and its solution for the measurement light in the blue and green regions.
In addition, in the second embodiment of Japanese Patent No. 2648494, as Figure 14 As shown, the following technical proposal is disclosed, that is, as the light source for measuring light, in addition to the white light source, a semiconductor light source such as a laser light source that can realize a large output of narrow-band light with a narrow wavelength band is used, but the semiconductor light source is used The method has the problem of causing an increase in manufacturing cost or complicating the structure of the device

Method used

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  • Endoscope system and light source device

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no. 2 Embodiment approach

[0118] In addition, in the first embodiment, as the narrow-band light N, two kinds of narrow-band light N11, the first narrow-band light N11 having a wavelength band of 470±10 nm, preferably 473 nm, and the second narrow-band light N12, which is 410±10 nm and preferably 410 nm, are used. band light, but it can also be composed of more than or equal to three kinds of narrow band light. In addition, the wavelength bands of the plurality of narrowband lights constituting the narrowband light N are an example, and may be other wavelength bands.

[0119] For example, if Figure 21 As shown, the third narrowband light N13 with a wavelength band of 580±10 nm, preferably 580 nm, may be added to the first narrowband light N11 and the second narrowband light N12 to form the narrowband light N from three kinds of narrowband light. By using the third narrowband light N13 having a longer wavelength than the first narrowband light N11 and the second narrowband light N12 and having a wavele...

no. 3 Embodiment approach

[0129] In the above-described embodiment, a monochromatic imaging element is used as the imaging element 44 of the electronic endoscope 11, and a rotary filter for separating the white light BB into three colors of B, G, and R is provided in the light source device 13. The example of the three-color surface sequential formula of , but it is also possible to apply the present invention to Figure 25 The three-color simultaneous system shown uses the color imaging element 100 as the imaging element of the electronic endoscope 11 . In the color imaging element 100, a color filter of any one of B, G, and R is provided in each pixel constituting the imaging surface, and pixels of three colors of B, G, and R are formed on the imaging surface. Pixels of three colors, for example arranged in a Bayer pattern. The spectral transmittance of each color filter of B, G, R, and Figure 5 The spectral transmittances of the B, G, and R filter portions of the rotary filter shown are the same....

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Abstract

The present invention provides an endoscope system (10) and a light source device (13). The light source device (13) of the endoscope system (10) is provided with a white light source (30). In the optical path of the light source, a rotating light filter (34) and a bandpass light filter (40). The rotating light filter (34) divides the color of the white color to three colors, namely B, G and R. The bandpass light filter (40) separates narrow-waveband light N from the colors of the white light. The bandpass light filter (40) is a device which is used for generating oxygen saturation measurement light that is used for measuring oxygen saturation of hemoglobin in blood, and has an optical characteristic that two narrow-waveband light N11 and N12 which are used for oxidizing hemoglobin and reducing hemoglobin and have wavebands that the light absorption coefficients are same. Because of the oxygen saturation measurement light is combined with light amount of two narrow-waveband light N11 and N12, the measurement precision or image brightness can be remarkably improved.

Description

technical field [0001] The present invention relates to an endoscope system and a light source device for observing the inside of a specimen. Background technique [0002] An endoscope system composed of an electronic endoscope, a light source device, and a processor device is widely used for diagnosis inside a specimen. When observing the interior of a specimen with an endoscope system, in addition to normal light observation using broad-band white light as illumination light, special light that uses narrow-band light with a narrower wavelength band to emphatically display blood vessels in the specimen observe. [0003] In addition, in the absorption spectrum of hemoglobin in blood, there is a band in which the absorption coefficient changes with the oxygen saturation in blood. It is also possible to extract the oxygen saturation information of hemoglobin in the blood from the image signal by using the illumination light of this wavelength band, and form it into an image....

Claims

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Application Information

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IPC IPC(8): A61B1/00A61B5/1459
CPCG06T2207/30004A61B5/1459A61B1/0638A61B5/14551G06T2207/10068G06T5/00A61B5/0084A61B5/14503A61B1/0646A61B1/000094
Inventor 斋藤孝明山口博司饭田孝之
Owner FUJIFILM CORP
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