Endoscopic device

Abstract

An endoscopic device comprises an endoscope provided with an objective optical system capable of the variable magnification of observation magnification, a light source device capable of selectively emitting broadband light including a visible light region, and a plurality of narrow-bands of light beams obtained by discretizing the light in the visible light region, an observation magnification change instruction section which performs a variable magnification instruction for gradually increasing or decreasing the observation magnification of the objective optical system, and a mode switching section for switching the light emitted from the light source device from one side to the other side when detecting the fact that the observation magnification gradually changes into the achievement of predetermined observation magnification on the basis of the variable magnification instruction.

Description

technical field [0001] The invention relates to an endoscope device, in particular to an endoscope device capable of changing the observation magnification. Background technique [0002] Conventionally, an endoscope device including an endoscope, a light source device, and the like has been widely used in the medical field and the like. In particular, endoscope devices in the medical field are mainly used for the observation of the living body by operators and the like. [0003] In addition, as observation using an endoscope device in the medical field, the following observation is generally known, for example: ordinary light observation, which includes R (red), G (green), B (blue) light of each color can obtain an image of approximately the same tone as observation with the naked eye; and narrow-band light observation, which can be obtained by irradiating the object with light having a band narrower than that of illumination light for ordinary light observation. An image ...

AI Technical Summary

Problems solved by technology

And, in the case of performing the above-mentioned operation while observing the image obtained by ordinary light observation, the following problems arise: the shallow depth of field of the optical system provided in the endoscope and the observation result (the surface of the mucous membrane surface) that become the basis for focus adjustment. At least one of microstructures and capillary pattern) reduction in contrast interacts, making it difficult to focus on the observation object

[0007] On the other hand, according to Japanese Unexamined Patent Publication No. 2007-020728, a technology for switching between the normal light observation mode and the narrowband light observation mode is disclosed at a predetermined observation magnification, but on the other hand, the above-mentioned operation is not mentioned, that is, , without mentioning the switching between the two observation modes assuming that the user actually performs endoscopic observation of a local area of ​​the subject existing in the living body

[0008] Therefore, according to the technology described in Japanese Patent Application Laid-Open No. 2007-020728, when endoscopic observation is performed on a local area of ​​a subject existing in a living body, it is likely to be impossible to obtain a suitable narrow-band light observation image. As a result, there is a problem that the time required for focus adjustment becomes longer

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