Electronic endoscope
First Claim
1. An electronic endoscope comprising:
- a video-scope that has a first image sensor and a second image sensor;
a light supplier that selectively irradiates white light and excitation-light on an observed portion;
a first color filter that is positioned on said first image sensor, is disposed along a light-path oriented toward said first image sensor, and has spectral transmitting characteristics that transmit light having a first wavelength range corresponding to blue color;
a second color filter that is positioned on said second image sensor, is disposed along a light-path oriented toward said second image sensor, and has spectral transmitting characteristics that transmit light having a second wavelength range corresponding to green and red colors;
a first signal processor that generates normal image video signals corresponding to a normal observation image on the basis of image-pixel signals that are read from said first and second image sensors by the white light;
a second signal processor that generates narrow-band video signals corresponding to a narrow-band image on the basis of image-pixel signals that are read from said first image sensor by reflected light of the excitation-light; and
a third signal processor that generates auto-fluorescent video signals corresponding to an auto-fluorescent image on the basis of image-pixel signals that are read from said second image sensor by auto-fluorescent light emitted from the observed portion.
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Accused Products
Abstract
An electronic endoscope according to the present invention has a video-scope that has a first image sensor and a second image sensor, and a light supplier that selectively irradiates white light and excitation-light on an observed portion. The electronic endoscope further has a first color filter that has spectral transmitting characteristics, such that light having a first wavelength range corresponding to blue color is transmitted, and a second color filter that has spectral transmitting characteristics, such that light having a second wavelength range corresponding to green and red colors is transmitted. The electronic endoscope has a first signal processor, a second signal processor, and a third signal processor. The first signal processor generates normal image video signals. The second signal processor generates narrow-band video signals. The third signal processor generates auto-fluorescent video signals.
37 Citations
17 Claims
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1. An electronic endoscope comprising:
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a video-scope that has a first image sensor and a second image sensor; a light supplier that selectively irradiates white light and excitation-light on an observed portion; a first color filter that is positioned on said first image sensor, is disposed along a light-path oriented toward said first image sensor, and has spectral transmitting characteristics that transmit light having a first wavelength range corresponding to blue color; a second color filter that is positioned on said second image sensor, is disposed along a light-path oriented toward said second image sensor, and has spectral transmitting characteristics that transmit light having a second wavelength range corresponding to green and red colors; a first signal processor that generates normal image video signals corresponding to a normal observation image on the basis of image-pixel signals that are read from said first and second image sensors by the white light; a second signal processor that generates narrow-band video signals corresponding to a narrow-band image on the basis of image-pixel signals that are read from said first image sensor by reflected light of the excitation-light; and a third signal processor that generates auto-fluorescent video signals corresponding to an auto-fluorescent image on the basis of image-pixel signals that are read from said second image sensor by auto-fluorescent light emitted from the observed portion. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14, 15, 16, 17)
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Specification