Capsule endoscope

A capsule endoscope and objective lens technology, applied in endoscopes, in-vivo radio detectors, medical science, etc., can solve problems such as increased cost, decreased detection rate of lesions, and increased length, so as to eliminate dead spots and improve coverage. sexual effect

Inactive Publication Date: 2009-03-11
OLYMPUS CORP
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  • Abstract
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  • Claims
  • Application Information

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Problems solved by technology

[0004] However, when multiple lenses are used to widen the angle of the optical system, the overall length becomes longer and the cost increases. Therefore, a structure is required to achieve wide-angle while reducing the number of lenses as much as possible. (Patent Document 2)
[0005] In addition, when only the field of view of the objective lens system is expanded and the same illumination system as in the past is used, it is expected that the brightness of the part of the field of view expanded by widening the angle will not be sufficient, and the detection rate of lesions will be reduced.

Method used

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Embodiment Construction

[0045] Hereinafter, the capsule endoscope of the present invention will be described based on an embodiment with reference to the drawings.

[0046] Figure 8 It is a diagram showing the front end structure of a conventional capsule endoscope 1. A transparent hemispherical dome 2 is arranged at the front end of the capsule endoscope 1, and is attached to the center of a frame member 3 inside the capsule endoscope 1. There is an objective lens 4, and a light emitting element 5 composed of a plurality of light emitting diodes (LED) or electroluminescent elements (EL) is arranged symmetrically with respect to the central axis on the plane front end of the frame member 3 on the periphery of the objective lens 4 for illumination. Such a configuration is such that the field of view range (dotted line) of the objective lens 4 is included in the illumination range (solid line) of the light emitting element 5 .

[0047] Such as Figure 9 As shown, when a capsule endoscope 10 with a d...

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Abstract

The invention relates to a capsule endoscope layout capable of achieving a small-format, wide-angle, wide light-distribution arrangement with limited variations. A capsule endoscope 1 comprises an objective lens 4, a transparent dome 2 to cover the object side of the objective lens, and light emitter devices located around the outer periphery of the objective lens. The endoscope 1 further comprises an integral-piece holder member 30 adapted to hold the objective lens 4 in place and hold the light emitter devices 5 at a position set back from an end of, and around, the objective lens 4 while the light emitter devices 5 are inclined outward at an angle with a center axis of said objective lens 4.

Description

technical field [0001] The invention relates to a capsule endoscope, in particular to an optimal structure for the capsule endoscope to observe a large field of view. Background technique [0002] Current capsule endoscopes do not have the function of freely scanning the direction of the field of view inside the body, unlike conventional endoscope bodies. Therefore, it can be said that compared with the endoscope body with the same field of view, the capsule endoscope will produce dead spots in the range where the field of view cannot be changed, and the probability of missing lesions will increase. [0003] Therefore, in a capsule endoscope that does not have a scanning function in the field of view, it is possible to eliminate blind spots by forming an imaging system with a front and rear double lens at a wide angle (Patent Document 1), thereby reducing the number of missed lesions. A dual-lens camera system is a very necessary feature. [0004] However, when multiple le...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): A61B1/00A61B1/06A61B5/07
CPCA61B1/041A61B1/0676A61B1/0605A61B1/0625
Inventor 折原达也福堀仁志
Owner OLYMPUS CORP
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