Living body observing device

A technology for observation devices and living organisms, which can be applied to instruments, televisions, applications, etc., and can solve the problems of reduced sensitivity characteristics and reduced illumination light quantity in the blue wavelength band.

Active Publication Date: 2009-04-01
OLYMPUS CORP
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  • Abstract
  • Description
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Problems solved by technology

[0007] However, for example, in the device described in the aforementioned Japanese Patent Application Laid-Open No. 2003-93336, in the illumination optical system for irradiating the subject with illumination light from a lamp and the imaging optical system for capturing the subject image, for example, due to the blocking The transmission characteristics of the light guide of the endoscope for near-ultraviolet light and the transmission characteristics of the infrared cut filter inserted in the light path of the light source, etc., often reduce the amount of illumination light in the blue wavelength band, and the sensitivity characteristics of the CCD are also in the blue wavelength band. Since the frequency band is lowered, when the spectral image of this blue wavelength band is generated from the captured image information, there is a problem that the S / N is relatively low compared with spectral images of other wavelength bands

Method used

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Embodiment 1

[0055] Figure 1 to Figure 36 Relating to embodiment 1 of the present invention, figure 1 is an external view showing the appearance of an electronic endoscope device, and FIG. 2 shows figure 1 Block diagram of the structure of the electronic endoscopy device, image 3 is a graph showing the transmission characteristics of the light quantity limiting filter of FIG. 2 , Figure 4 is a diagram showing the arrangement of color filters provided on the front surface of the CCD in FIG. 2 , Figure 5 It is a figure explaining the matrix calculation method of the calculation matrix in the matrix operation part of FIG. 2, Image 6 is a graph showing the spectral characteristics of the spectral image generated by the matrix operation unit in FIG. 2 , Figure 7 It is a figure showing the layer direction structure of the biological tissue observed by the electronic endoscope apparatus of FIG. 2, Figure 8 It is a figure explaining the state in which the illumination light from the el...

Embodiment 2

[0154] Figure 37~ Figure 43 Referring to Embodiment 2 of the present invention, FIG. 37 is a block diagram showing the configuration of an electronic endoscope apparatus, Figure 38 is a diagram showing the structure of the RGB rotation filter of FIG. 37 , Figure 39 It shows the transmission of the first spectral image generation mode, that is, when there is no light quantity limiting filter on the optical path. Figure 38 A plot of the spectral properties of light for an RGB spin filter, Figure 40 It shows the transmission of the second spectral image generation mode, that is, when there is a light quantity limiting filter on the optical path. Figure 38 Fig. 41 is a block diagram showing the structure of a modified example of the electronic endoscope device of Fig. 37, Figure 42 is a diagram showing the structure of the RGB rotation filter of FIG. 41 , Figure 43 is showing Figure 38 A diagram of the structure of a modification of the RGB rotation filter.

[0155]...

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Abstract

A light source unit (41) connected with a control unit (42) and an endoscope (101) emits whit light with a specified light quantity based on a signal from the control unit (42). The light source unit (41) comprises a lamp (15) as a white light source, an infrared cutting filter (15a), a light quantity limiting filter (16) inserted / removed into / from a light path to limit a light quantity in a specified wavelength region of white light, a filter inserting / removing drive unit (17) for inserting / removing the light quantity limiting filter (16) into / from the light path, and a condenser lens (18) for emitting white light. For example, the light quantity limiting filter (16) limits, when transmittance in a blue band is 100%, transmittance in the other bands to 50%. Accordingly, an S / N in a visible light region in generating a discrete spectral image by a lighting light is improved.

Description

technical field [0001] The present invention relates to a living body observation device which utilizes color image signals obtained by photographing a living body and displays them as spectral images on a display device through signal processing. Background technique [0002] Conventionally, as a living body observation device, an endoscope device that irradiates illumination light to obtain an endoscopic image of the inside of a body cavity has been widely used. In such an endoscope device, an electronic endoscope having an imaging section that introduces illumination light from a light source device into a body cavity using a light guide or the like, and photographs a subject with the returned light is used. The scope device performs signal processing on an imaging signal from the imaging unit by a video processor, displays an endoscopic image on an observation monitor, and observes an observation site such as an affected area. [0003] In the case of performing normal b...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): A61B1/04G02B23/24H04N7/18
CPCH04N5/2256A61B1/00009G02B23/24H04N2005/2255A61B1/0638A61B1/0646A61B1/063A61B1/000094A61B1/044A61B1/0655H04N23/56H04N23/555A61B1/04H04N7/18
Inventor 山崎健二后野和弘浦崎刚竹村尚
Owner OLYMPUS CORP
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