Imaging system

Abstract

This imaging system contains: a plurality of semiconductor light-emitting elements that emit light of multiple colors, including light of a prescribed color for illuminating a photographic subject; a light quantity detection unit that detects the quantity of light emitted by each of the semiconductor light-emitting elements; an imaging element that takes an optical image of the photographic subject; a control unit that sets a light-quantity control pattern corresponding to the imaging operation of the imaging element and, on the basis of the light-quantity control pattern that is set, drives a reference semiconductor light-emitting element that emits light of the prescribed color; an exposure period setting unit that sets the exposure period of the light-quantity detection unit on the basis of the light-quantity control pattern; and a color balance adjustment unit that adjusts the color balance of the light of multiple colors by driving, on the basis of the light-quantity control pattern and the quantity of the light of multiple colors detected during the exposure period of the light-quantity detection unit, the semiconductor light-emitting elements other than the reference semiconductor light-emitting element.

Description

technical field [0001] The present invention relates to an imaging system, in particular to an imaging system using a light emitting element as a light source. Background technique [0002] As an imaging system for imaging a subject inside a subject and acquiring an image, for example, an imaging system configured to include an endoscope and a light source device is conventionally known. [0003] Here, in the endoscope included in the imaging system, as an imaging element for imaging a subject, for example, a technology using a CCD image sensor (hereinafter abbreviated as CCD) is generally known, and in recent years, a A technology of a CMOS image sensor (hereinafter abbreviated as CMOS) is used. [0004] In addition, in the light source device included in the imaging system, as a light source for supplying illumination light for illuminating a subject, for example, a technology using a xenon lamp is generally known, and in recent years, it has been proposed to use an LD (l...

AI Technical Summary

Problems solved by technology

[0006] However, in Japanese Patent Application Laid-Open No. 2013-215435, the point of view of setting the light quantity control pattern for LD and LED according to the type of imaging element provided on the endoscope, and the effect of the set light quantity control pattern on color The point of view of changing the exposure period of the photosensor for balance correction is not disclosed, etc.

Therefore, according to the structure disclosed in Japanese Patent Application Laid-Open No. 2013-215435, there arises a problem that it is impossible to adjust the color balance of the illumination light emitted from the light source device for an endoscope so that it becomes the same color as that provided on the endoscope. Appropriate color balance corresponding to the type of imaging element

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