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Light source device

A light source device and light quantity technology, which is applied in the direction of light source, electric light source, measuring device, etc., can solve the problems of light quantity detection, low resolution, etc.

Active Publication Date: 2016-08-17
OLYMPUS CORP
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

In each optical sensor, it is necessary to set the maximum value of the incident light amount that can be detected according to the emitted light amount of the LED with the largest maximum light amount. For an optical sensor that detects light from an LED with a relatively small maximum light amount, there is a resolution. The problem that light intensity detection cannot be performed with sufficient precision due to low

Method used

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no. 1 Embodiment approach

[0022] figure 1 It is a block diagram showing the light source device according to the first embodiment of the present invention. In this embodiment, the light source device is applied to an endoscope system including an endoscope, a video processor, and a monitor.

[0023] The endoscope system 1 is composed of an endoscope 10 , a video processor 20 , a monitor 30 , and a light source device 40 . The endoscope 10 has an elongated insertion portion 11 capable of being inserted into a lumen or the like at a distal end thereof, and is detachably connected to a light source device 40 via a connector 12 at a proximal end thereof.

[0024] In addition, the endoscope 10 is detachably connected to the video processor 20 via a cable 17 and a connector 18 . In this way, different types of endoscopes can be mounted on the light source device 40 and the video processor 20 .

[0025] The front end of the insertion part 11 is provided with an imaging element 13 and a lens 14, wherein the...

no. 2 Embodiment approach

[0067] Figure 8 It is an explanatory diagram for explaining the second embodiment of the present invention. The present embodiment employs a light guide as the light amount limiting member. also, Figure 8 Only the configuration of the optical system for detecting the light intensity of each LED in the light source device is shown.

[0068] The light source device in this embodiment includes a light source unit 81 that emits light toward an endoscope or the like, and three sensors 83R, 83G, and 83B. The light source unit 81 is provided with three R-LEDs 81R, G-LEDs 81G, and B-LEDs 81B that emit R, G, and B lights, respectively. Lenses 83R, 83G, and 83B are arranged on the optical axis of the light emitted from each of LEDs 81R, 81G, and 81B, respectively. Each lens 83R, 83G, 83B converts the emitted light of LED 81R, 81G, 81B into substantially parallel light, and emits it. The emitted lights of these LEDs 81R, 81G, and 81B are synthesized by an optical path section comp...

no. 3 Embodiment approach

[0076] Figure 9 It is an explanatory diagram for explaining the third embodiment of the present invention. This embodiment shows an example using a color sensor as a sensor. exist Figure 9 In pair with Figure 8 The same structural elements are given the same reference numerals and descriptions thereof are omitted.

[0077] In this embodiment, only one color sensor 90 is used to replace Figure 8 The three sensors 82R, 82G, and 82B differ from the second embodiment in this point. As the color sensor 90 , for example, a sensor having three light receiving sections for red, green, and blue can be used, but the present invention is not limited thereto.

[0078] The outgoing surfaces of the light guides 87R, 87G, and 87B that guide the outgoing light from the LEDs 81R, 81G, and 81B are desirably on the respective incident surfaces of the three light receiving sections of the color sensor 90 . The color sensor 90 can obtain the light quantities of the R, G, and B lights inc...

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Abstract

A light source device equipped with: first and second semiconductor light-emitting elements; first and second light quantity-detecting units, which have the same detection range as each other and are for detecting the respective light quantities emitted by the first and second semiconductor light-emitting elements; a light quantity-limiting means having, in order to match first and second light quantities that are the maximum light quantities used of the first and second semiconductor light-emitting elements to specified values in the detection ranges, a first light quantity-limiting unit, which limits the first light quantity that impinges on the first light quantity-detecting unit from the first semiconductor light-emitting element, and / or a second light quantity-limiting unit, which limits the second light quantity that impinges on the second light quantity-detecting unit from the second semiconductor light-emitting element; and a control unit for controlling the amount of light emitted by the first semiconductor light-emitting element and the second semiconductor light-emitting element on the basis of the detection results of the first and second light quantity-detecting units.

Description

technical field [0001] The present invention relates to a light source device suitable for an endoscope. Background technique [0002] Conventionally, endoscopes that insert a long and thin endoscope into a body cavity or the like to perform observation of a site to be inspected or perform various treatments have been widely used. In such an endoscope, a light source device is used for imaging the cavity. In recent years, a light source device using a semiconductor light source such as an LED as a light emitting unit has been used in some cases. Such a light source device can control the dimming of LEDs by PWM control that changes the duty ratio of the driving pulse or current control that changes the LED current. [0003] As an illuminating device using such an LED light source, there is a device disclosed in JP-A-2009-192772. The device of Japanese Patent Application Laid-Open No. 2009-192772 synthesizes light from LEDs that generate red light, LEDs that generate green ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): A61B1/06G02B23/26H05B44/00
CPCA61B1/0638A61B1/0684A61B1/07G02B27/141G02B23/2469H05B45/22H05B45/325A61B1/0655H05B45/14G01J1/0418G01J1/0425G01J1/0437G01J1/0488G02B23/2461
Inventor 坂井爱子町田亮矢部雄亮高桥智也
Owner OLYMPUS CORP
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