An endoscopic optical system that can be used for both infrared and visible monitoring

Abstract

The invention relates to an endoscope optical system used for infrared and visible monitoring simultaneously. The endoscope optical system used for infrared and visible monitoring simultaneously comprises a head reflecting mirror set, a collimating lens and a color separation plate, wherein the collimating lens and the color separation plate are sequentially arranged in a subsequent light path. The color separation plate forms a subsequent infrared branch path by penetrating medium wave infrared beams and forms a subsequent visible light branch path by reflecting visible light beams. The infrared branch path is sequentially provided with a field lens and a secondary imaging lens group. The visible light branch path is provided with an imaging lens group. By means of the technical scheme of the endoscope optical system used for infrared and visible monitoring simultaneously, a customized visible light CCD (Charge Coupled Device) and an infrared camera are used for receiving an image plane, the image quality is substantially constant when the object distance is in the range of 500mm-5000mm, and the endoscope optical system used for infrared and visible monitoring simultaneously can be applied to a conventional environment and harsh environments, such as high-temperature, vacuum, contaminated environments.

Description

technical field [0001] The invention belongs to the technical field of optoelectronics and infrared imaging, and in particular relates to an endoscope optical system which can be used for infrared and visible monitoring simultaneously. Background technique [0002] Disease diagnosis has long been and continues to be performed by various biopsy procedures. A biopsy requires removal of a (deep) tissue sample from the patient's body, analysis of the sample by a pathologist, and a report, which can take anywhere from a few hours to a few days or more. Instead, endoscopy can significantly reduce the pain, time, and cost associated with conventional biopsy procedures and aid in the diagnosis of disease and the extent of tissue damage resulting from the condition. [0003] In order to achieve the above effects, endoscopes need low magnification, large field of view imaging and high magnification, high resolution multiphoton imaging must have two effective optical imaging systems (...

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