公开(公告)号：US10151913B2

公开(公告)日：2018-12-11

申请号：US15612161

申请日：2017-06-02

Applicant: MEDICAL INTUBATION TECHNOLOGY CORPORATION

Inventor： Chih-Chun Chan

IPC: G02B23/24 ,  G01B11/03 ,  H04N5/225 ,  G06T7/521 ,  G02B27/42 ,  G01B11/02

Abstract: An endoscopic distance measurement method, which causes a single wavelength light source in an observation unit at a front end of a flexible tube of an endoscope to emit a predetermined wavelength light to an object to be measured via a diffraction grating so as to form a zero-order bright spot, a positive first-order bright spot and a negative first-order bright spot on the surface of the object through optical diffraction, and then capture an image from the object, and then calculate a distance magnification using a first arithmetic logic, and then to calculate the actual distance between two adjacent bright spots of the predetermined wavelength light being projected on the object using a second arithmetic logic and then to calculate the distance between the diffraction grating and the zero-order bright spot using a third arithmetic logic.