Front and rear field-of-view electronic endoscope

Abstract

The invention discloses a front and rear field-of-view electronic endoscope. An objective front-end probe part is composed of an light-emitting diode (LED) cold light source, an optical system and a charge coupled device (CCD), wherein the optical system is composed of a compound lens, a first single lens, a doublet lens and a second single lens which are sequentially and coaxially arranged; the compound lens takes a combined shape of a concave lens and a meniscus lens; the front surface of the lens adopts a convex spherical surface, the inner surface of the lens adopts a concave spherical surface, the outer surface of the lens adopts a convex spherical surface; the lens front end face of the compound lens is annular; an annular reflective film is arranged on the front end face of the lens. In order to meet the rear field-of-view observation needs, the first lens of the optical system is designed into the compound lens, so that light emitted by a rear object enters the optical system via the lens outer surface of the compound lens, irradiates onto the annular reflective film of the compound lens for reflecting, exits through the inner surface of the lens after emission, sequentially passes through the first single lens, the doublet lens and the second single lens and is finally imaged in the edge area of the CCD.

Description

technical field [0001] The invention relates to a medical endoscope, in particular to an electronic endoscope with front and rear fields of view, which is suitable for minimally invasive surgery. Background technique [0002] Endoscopes generally refer to medical instruments that enter the human body through various channels to observe the internal conditions of the human body. The endoscope can be used to see lesions that cannot be seen on X-rays, so it is very useful for doctors. Some endoscopes also have therapeutic functions, such as cystoscope, gastroscope, colonoscope, bronchoscope, laparoscope, etc. With the development of minimally invasive surgery technology, endoscopes have been more and more used in minimally invasive surgery in surgery. [0003] At present, the field of view that can be observed by electronic endoscopes at home and abroad is generally 60° to 120°. It can observe in one direction, but it can only observe one side. The front part of the field of...

AI Technical Summary

Problems solved by technology

[0005] The object of the present invention is to provide an electronic endoscope with front and rear viewing fields, which can observe the front and rear viewing fields at the same time, which solves the shortcomings of traditional endoscopes and also solves the shortcoming that glass fibers are easy to break. Good for minimally invasive surgery

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