Lighting optical system for endoscope

A technology of lighting optical system and endoscope, which is applied to the field of lighting optical system for endoscope and can solve the problem of too dark light quantity and the like

Inactive Publication Date: 2013-05-29
OLYMPUS CORP
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

In the opposite case, if the automatic light adjustment unit installed in the endoscope is used to automatically adjust the light quantity to make the light quantity appropriate, the light quantity incident from the rear area will become too dark

Method used

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  • Lighting optical system for endoscope
  • Lighting optical system for endoscope
  • Lighting optical system for endoscope

Examples

Experimental program
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Effect test

no. 1 Embodiment approach

[0042] Figure 4 It is an explanatory diagram showing the schematic configuration of the illumination optical system for an endoscope according to the first embodiment of the present invention, Figure 4 (a) is a figure which shows an example of the light source part used as one technical feature of the illumination optical system for endoscopes of 1st Embodiment, Figure 4 (b) means from Figure 4 (a) is an explanatory diagram of a state where the light beam of the light source unit is incident on the incident-side end surface of the light guide unit used as one technical feature of the endoscope illumination optical system according to the first embodiment, Figure 4 (c) is an explanatory diagram showing a main part of a modified example of the illumination optical system for an endoscope according to the first embodiment, Figure 4 (d) is an explanatory diagram of main parts showing another modified example of the illumination optical system for an endoscope according to ...

no. 2 Embodiment approach

[0066] Figure 7 It is an explanatory diagram showing a schematic configuration of a main part of an illumination optical system for an endoscope according to a second embodiment of the present invention, Figure 7 (a) is a figure which shows an example of the illumination lens used as one technical feature of the illumination optical system for endoscopes of 2nd Embodiment, Figure 7 (b) is a diagram showing a modified example of the illumination optical system for an endoscope according to the second embodiment, Figure 7 (c) is a diagram showing another modified example of the illumination optical system for an endoscope according to the second embodiment. Figure 8 It is an explanatory diagram further showing a schematic configuration of a main part of another modified example of the illumination optical system for an endoscope according to the second embodiment. Figure 9 It is an explanatory diagram further showing a schematic configuration of a main part of another mo...

no. 3 Embodiment approach

[0091] Figure 12 It is an explanatory diagram showing the configuration of the main part of the illumination optical system for an endoscope according to the third embodiment.

[0092] The illumination optical system for an endoscope according to the third embodiment has: a light source unit not shown in the figure; a light guide member 2 into which light from the light source unit enters; Figure 6 As shown, a reflective surface 3a is provided in the circumferential direction of the endoscope. The light guide member 2 has one end face 2a on the incident side, and has a plurality of branched end faces on the outgoing side, one of the branched end faces is an end face 2b' for front irradiation, and the rest is for side to rear irradiation. Constructed with the end face 2b. In addition, in Figure 12 Among them, 4" is the illumination lens for front illumination.

[0093] For example, by combining the light source and the light guide member in the illumination optical syste...

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PUM

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Abstract

An illumination optical system for endoscopes, which is used by combining the llumination optical system with an objective optical system, where the objective optical system can observe a predetermined area at least ranging from the lateral direction to the backward direction with respect to the longitudinal direction of an endoscope and across the range of 180 degrees or more in the circumferential direction of the endoscope, and which is provided with an illumination optical system capable of radiating light to the predetermined area which can be observed by the objective optical system, is formed in such a way that illumination light becomes central darkening along the longitudinal direction of the endoscope and across the range of 180 degrees in the circumferential direction of the endoscope which can be observed by the objective optical system and that the illumination optical system has a luminous intensity distribution characteristic in which the central-darkening illumination light is radiated to the vicinity of the lateral direction with respect to the longitudinal direction of the endoscope.

Description

technical field [0001] The present invention relates to an illumination optical system for an endoscope used, for example, in an endoscope capable of observing the side and the rear. Background technique [0002] Conventionally, as an endoscope used for detecting a lesion inside the folds of a lumen such as the large intestine, for example, there is an endoscope that can observe a predetermined range from the side to the rear with respect to the longitudinal direction. [0003] For example, in Japanese Patent Application Laid-Open 2002-65589 ( Figure 5 ), JP 2004-33487 ( Figure 8 ), JP 2005-319315 ( figure 2 ), Japanese Patent Laying-Open Hei 7-191269 ( figure 1 ), JP 2004-329700 ( figure 1 ), and Japanese Patent Laid-Open No. 2003-164418 ( Figure 4 ) and the like disclose an endoscope that can observe a predetermined range from the side to the rear with respect to the longitudinal direction. [0004] However, in such a conventional endoscope that can observe a pr...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): G02B23/26A61B1/00A61B1/06
CPCA61B1/07A61B1/00096A61B1/00177A61B1/00179A61B1/0615A61B1/0623A61B1/0676A61B1/0684A61B1/31G02B23/243G02B23/2469
Inventor 金野光次郎
Owner OLYMPUS CORP
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