CN201171665Y - Stereo electronic endoscope dual-channel video signal acquisition device - Google Patents

Abstract

Translated fromChinese

立体电子内窥镜双路视频信号获得装置属于医用光学电子仪器技术领域。已知技术结构复杂，光学组件多，重量大，光能损失大，图像分辨率低。本实用新型由镜杆、两个视频信号获得部件、导光束组成，每个视频信号获得部件由镜管以及安装其内的物镜、CCD固态成像单元、电缆组成。结构大为简化，重量减轻，光能损失减小。导光束分布于并列的两个镜管6上下，照明效果改善。图像像质也因上述措施得到改善。可应用于医疗领域里的立体电子内窥镜系统中。

The utility model relates to a dual-channel video signal acquisition device of a stereoscopic electronic endoscope, which belongs to the technical field of medical optical and electronic instruments. The known technology has complex structure, many optical components, heavy weight, large light energy loss and low image resolution. The utility model is composed of a mirror rod, two video signal acquisition parts, and a light guide. Each video signal acquisition part is composed of a mirror tube, an objective lens installed in it, a CCD solid-state imaging unit, and a cable. The structure is greatly simplified, the weight is reduced, and the loss of light energy is reduced. The light guide is distributed above and below the two parallel mirror tubes 6, so that the lighting effect is improved. Image quality is also improved due to the above measures. It can be applied to the stereo electronic endoscope system in the medical field.

Description

Translated fromChinese

立体电子内窥镜双路视频信号获得装置Stereo electronic endoscope dual-channel video signal acquisition device

技术领域technical field

本实用新型涉及一种立体电子内窥镜系统中的视频信号获得装置，属于医用光学电子仪器技术领域。The utility model relates to a video signal acquisition device in a three-dimensional electronic endoscope system, which belongs to the technical field of medical optical and electronic instruments.

背景技术Background technique

与本实用新型相关的已知技术是一种被称为立体电视内窥镜的方案，其视频信号获得装置外形见图1所示，由镜杆1、握柄2、CCD电缆接口3、导光束接口4组成，其两路光学成像系统以及光电转换部件安装在镜杆1中，光学成像系统通常由物镜系统、转像系统、目镜、投影物镜组成，在导光束的照明下获取光学影像并投影到光电转换部件CCD的光电靶面上转换为视频信号，经CCD电缆传输到立体图像处理器，经体视处理后在显示器上显示出立体图像。Known technology relevant to the utility model is a kind of scheme that is called stereoscopic TV endoscope, and its video signal acquisition device profile is shown in Figure 1, bymirror bar 1,handle 2,CCD cable interface 3, guide Thebeam interface 4 is composed of two optical imaging systems and photoelectric conversion components installed in themirror rod 1. The optical imaging system is usually composed of an objective lens system, an image transfer system, an eyepiece, and a projection objective lens. Projected onto the photoelectric target surface of the photoelectric conversion component CCD, it is converted into a video signal, which is transmitted to a stereoscopic image processor through a CCD cable, and a stereoscopic image is displayed on a monitor after stereoscopic processing.

实用新型内容Utility model content

已知技术存在的主要问题是，结构复杂，光学组件多，重量大，光能损失大，图像分辨率低。为了解决已知技术存在的问题，同时使所提出技术方案更为具体、实用、照明均匀、安装调整方便，我们设计了本实用新型之立体电子内窥镜双路视频信号获得装置。The main problems of the known technology are complex structure, many optical components, heavy weight, large light energy loss and low image resolution. In order to solve the existing problems of the known technology, and to make the proposed technical solution more specific, practical, uniform in illumination and convenient for installation and adjustment, we have designed a dual-channel video signal acquisition device for a stereoscopic electronic endoscope of the present utility model.

本实用新型是这样实现的，见图1、图2、图3所示，所述的装置由镜杆1、两个视频信号获得部件、导光束5组成，两个视频信号获得部件并列且位于镜杆1前端A内，每个视频信号获得部件由镜管6以及安装其内的物镜7、CCD固态成像单元8、电缆9组成，CCD固态成像单元8的光电靶面10位于物镜7的焦平面上，电缆9接CCD固态成像单元8，两个视频信号获得部件中的物镜7光轴平行，导光束5位于镜杆1内壁与两个镜管6外壁之间的空间内。The utility model is realized in this way, as shown in Fig. 1, Fig. 2 and Fig. 3, the described device is made up of amirror bar 1, two video signal obtaining parts, and alight guide 5, and the two video signal obtaining parts are arranged side by side and located at In the front end A of themirror rod 1, each video signal acquisition part is composed of amirror tube 6 and an objective lens 7 installed therein, a CCD solid-state imaging unit 8, and acable 9. Thephotoelectric target surface 10 of the CCD solid-state imaging unit 8 is located at the focal point of the objective lens 7. On the plane, thecable 9 is connected to the CCD solid-state imaging unit 8, the optical axes of the objective lens 7 in the two video signal acquisition components are parallel, and thelight guide 5 is located in the space between the inner wall of themirror rod 1 and the outer walls of the twomirror tubes 6 .

本实用新型与已知技术相比，核心部分只有物镜7和CCD固态成像单元8，结构大为简化，重量减轻，光能损失减小。导光束5分布于并列的两个镜管6上下，照明效果改善。图像像质因上述措施得到改善。物镜7和CCD固态成像单元8集中在镜杆1的前端，与已知技术相比完全可以通过加长电缆9完成视频信号的正常输出。Compared with the known technology, the utility model only has the objective lens 7 and the CCD solid-state imaging unit 8 in the core part, the structure is greatly simplified, the weight is reduced, and the loss of light energy is reduced. Thelight guide beam 5 is distributed above and below the twoparallel mirror tubes 6, so that the lighting effect is improved. Image quality is improved due to the above measures. The objective lens 7 and the CCD solid-state imaging unit 8 are concentrated at the front end of themirror rod 1, and the normal output of the video signal can be completed by extending thecable 9 compared with the known technology.

附图说明Description of drawings

图1是已知技术立体电视内窥镜视频信号获得装置外形示意图。图2是本实用新型之装置端面示意图。图3是本实用新型之装置图1A部分的局部放大及沿图2A-A方向的剖视示意图。图4是本实用新型之装置的具体实施方式端面示意图。图5是本实用新型之装置的具体实施方式图1A部分的局部放大及沿图4A-A方向的剖视示意图，该图兼作摘要附图。Fig. 1 is a schematic diagram of the appearance of a stereoscopic TV endoscope video signal acquisition device in the known technology. Fig. 2 is a schematic view of the end face of the device of the present invention. Fig. 3 is a partially enlarged part of Fig. 1A of the device of the present invention and a schematic cross-sectional view along the direction of Fig. 2A-A. Fig. 4 is a schematic diagram of the end face of a specific embodiment of the device of the present invention. Fig. 5 is a partial enlarged part of Fig. 1A and a schematic cross-sectional view along the direction of Fig. 4A-A of the specific embodiment of the device of the present invention, which is also used as a summary drawing.

具体实施方式Detailed ways

本实用新型的具体实施方式如下，见图1、图4、图5所示，所述的装置由镜杆1、两个视频信号获得部件、导光束5组成。镜杆1采用不锈钢材料制作，外径为8～12毫米。两个视频信号获得部件并列且位于镜杆1前端A内，每个视频信号获得部件由镜管6以及安装其内的物镜7、CCD固态成像单元8、电缆9组成，CCD固态成像单元8的光电靶面10位于物镜7的焦平面上，电缆9接CCD固态成像单元8，两个视频信号获得部件中的物镜7光轴平行。物镜7采用三片式结构，即一片负透镜和由两片透镜组合而成的正透镜。负透镜采用平凹透镜11，平面为进光端。正透镜为一片弯月厚透镜12和一片双凸透镜13的组合。在平凹透镜11和弯月厚透镜12之间安装孔径光阑14。两个物镜7的光轴间距为5～10毫米，根据立体电子内窥镜的体视要求确定具体值。所述的三片式结构物镜具有结构紧凑、像差小的特点。为了避免所窥视的生物体体液污染和腐蚀本装置内部，在镜管6进光端端面安置保护玻璃15，其选材要求耐腐蚀，耐磨损、可见光透过滤大于95％。为了保持两支镜管6在镜杆1内的平行状态，以及便于两支镜管6和导光束5向镜杆1内的安装，设计一种支架16，它由一个外圆筒及其内部的两个内圆筒组成，三个圆筒为连体结构，由一段圆柱材料采用线切割的方式加工而成，或者采用注塑的方式一次完成成形。三个圆筒轴线平行，两个内圆筒并列排布。外圆筒与镜杆1静配合，内圆筒与镜管6静配合。导光束5填充于外圆筒与两个内圆筒之间的空间内。导光束5中的光纤数值孔径角大于等于物镜7的视场角，保证照明良好。所获得的视频信号由电缆9输出。The specific implementation of the present utility model is as follows, see Fig. 1, Fig. 4, Fig. 5 shown, described device is made up ofmirror bar 1, two video signal acquisition parts,guide beam 5. Themirror rod 1 is made of stainless steel with an outer diameter of 8-12 mm. Two video signal acquisition parts are arranged side by side and are positioned at the front end A ofmirror bar 1, and each video signal acquisition part is made up ofmirror tube 6 and objective lens 7, CCD solid-state imaging unit 8,cable 9 installed in it, the CCD solid-state imaging unit 8 Thephotoelectric target surface 10 is located on the focal plane of the objective lens 7, thecable 9 is connected to the CCD solid-state imaging unit 8, and the optical axes of the objective lens 7 in the two video signal acquisition components are parallel. The objective lens 7 adopts a three-piece structure, that is, a negative lens and a positive lens composed of two lenses. The negative lens adopts a plano-concave lens 11, and the plane is the light-incoming end. The positive lens is a combination of athick meniscus lens 12 and abiconvex lens 13 . Anaperture stop 14 is installed between the plano-concave lens 11 and thethick meniscus lens 12 . The distance between the optical axes of the two objective lenses 7 is 5-10 millimeters, and the specific value is determined according to the stereoscopic requirements of the stereoscopic electronic endoscope. The three-piece structure objective lens has the characteristics of compact structure and small aberration. In order to avoid the contamination and corrosion of the biological body fluids peeped inside the device, aprotective glass 15 is placed on the end face of the light inlet end of themirror tube 6, and its material selection requires corrosion resistance, wear resistance, and visible light transmission and filtration greater than 95%. In order to keep the parallel state of the twomirror tubes 6 in themirror rod 1, and to facilitate the installation of the twomirror tubes 6 and thelight guide 5 in themirror rod 1, asupport 16 is designed, which consists of an outer cylinder and its inside It is composed of two inner cylinders, and the three cylinders are a conjoined structure, which is processed by wire cutting from a section of cylindrical material, or formed at one time by injection molding. The axes of the three cylinders are parallel, and the two inner cylinders are arranged side by side. The outer cylinder is statically matched with themirror rod 1, and the inner cylinder is statically matched with themirror tube 6. Thelight guide 5 is filled in the space between the outer cylinder and the two inner cylinders. The numerical aperture angle of the optical fiber in thelight guide 5 is greater than or equal to the field angle of the objective lens 7 to ensure good illumination. The obtained video signal is output bycable 9 .

Claims (6)

1, a kind of electric Endoscope two-way video signal obtains device, it is characterized in that, by mirror bar (1), two video signals obtain parts, light guide bundles (5) is formed, two video signals obtain parts side by side and be positioned at mirror bar (1) front end (A), each video signal acquisition parts is by mirror pipe (6) and its interior object lens (7) are installed, CCD solid-state imaging unit (8), cable (9) is formed, the photoelectricity target surface (10) of CCD solid-state imaging unit (8) is positioned on the focal plane of object lens (7), cable (9) connects CCD solid-state imaging unit (8), object lens (7) optical axis that two video signals obtain in the parts is parallel, and light guide bundles (5) is positioned at the space between mirror bar (1) inwall and two mirror pipes (6) outer wall.

2, two-way video signal according to claim 1 obtains device, it is characterized in that, object lens (7) adopt the three-chip type structure, be a slice minus lens and the plus lens that combines by two lens, minus lens adopts planoconcave lens (11), the plane is a light inlet, and plus lens is the combination of a slice bent moon thick lens (12) and a slice biconvex lens (13), between planoconcave lens (11) and bent moon thick lens (12) aperture diaphragm (14) is installed.

3, two-way video signal according to claim 1 obtains device, it is characterized in that, the optical axis spacing that two video signals obtain the object lens (7) in the parts is 5～10 millimeters.

4, two-way video signal according to claim 1 obtains device, it is characterized in that, settles cover glass (15) at mirror pipe (6) light inlet end face.

5, two-way video signal according to claim 1 obtains device, it is characterized in that, perhaps design a kind of support (16), it is made up of an outer cylinder and two inner inner cylinders thereof, and three cylinders are conjoined structure, and axis is parallel, two inner cylinders are arranged side by side, outer cylinder and mirror bar (1) stationary fit, inner cylinder and mirror pipe (6) stationary fit, light guide bundles (5) is filled in the space between outer cylinder and two inner cylinders.

6, obtain device according to claim 1 or 5 described two-way video signals, it is characterized in that the Optical Fiber Numerical Aperture angle in the light guide bundles (5) is more than or equal to the angle of visual field of object lens (7).

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