Medical electronic endoscope with built-in power source

Abstract

The invention provides a medical electronic endoscope with a built-in power source. The medical electronic endoscope is tubular in shape. The front end of the medical electronic endoscope is providedwith a photoelectric conversion unit and a lighting unit, wherein the photoelectric conversion unit is used for converting optical signals collected by an imaging window and an imaging lens to electric signals of static images and / or videos; light emitted by the lighting unit casts to a target area pointed by the endoscope uniformly through a lighting window arranged on the front end of the medical electronic endoscope and besides the imaging window; the rear end of an imaging lens barrel of the imaging lens is arranged to have a full chamfer, and a filter sheet is used in combination for physical isolation of the photoelectric conversion unit and the imaging lens, so that the electric safety of the endoscope in use is improved. The medical electronic endoscope provided by the invention issmall in size, convenient to operate, clear in imaging, good in electric property and low in use cost and support high temperature high voltage sterilization.

Description

technical field [0001] The invention belongs to the technical field of rigid tube endoscopes, in particular to a medical electronic endoscope with a built-in light source. Background technique [0002] Medical endoscopes enter the closed environment of the human body through natural passages or minimally invasive incisions. A light source is required for illumination and imaging of internal tissues. Surgeons perform corresponding surgical operations through the display screen. Endoscope illumination quality, imaging quality, operation convenience, and system performance stability have an important impact on the success rate of surgery, especially complex surgery. [0003] First of all, the lighting quality of the light source is an important factor affecting the performance of the speculum. Most of the existing endoscopes use an external medical cold light source, usually a halogen lamp that filters most of the infrared spectrum through an infrared filter, and then transmit...

AI Technical Summary

Problems solved by technology

This external light source has several significant disadvantages: (1) The power of the external light source is high, and the photoelectric conversion efficiency is very low. Most of the input electric power is converted into heat energy. Due to the need for heat dissipation, the noise of the light source host is relatively large. (2) The external light source needs to occupy a certain operating room space, which is a burden for the small operating room; (3) Since the endoscope held by the doctor needs an optical fiber bundle for transmission, it increases the operating time. Inconvenient, slightly larger bending angle of the optical fiber bundle is prone to damage, resulting in attenuation or even failure of illumination, thus increasing the burden on doctors to perform operations

Traditional optical mirrors transmit optical signals through several relay lenses (usually rod mirrors). This transmission method has obvious defects: (1) The high-precision assembly of dozens of relay lenses will significantly improve the quality of endoscope manufacturing. (2) When the optical signal is repeatedly refracted and reflected in the relay lens, the attenuation of the signal light intensity will inevitably occur, and lead to a significant increase in stray light, which will reduce the signal-to-noise ratio of the system, thereby reducing the imaging performance. quality

There is current leakage when the electric knife is working, and there is static electricity on the lens barrel. If the charge breaks through the air and flows to the circuit board of the image sensor, the image sensor PCB board will malfunction or even be damaged. The design of electrostatic isolation is very important for endoscopes. The stability of performance has an important impact on

[0006] Finally, the existing endoscopes have not been popularized in hospitals on a large scale. A large reason is that the cost of using endoscopes is high.

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