公开(公告)号：US20180003943A1

公开(公告)日：2018-01-04

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

CPC classification number: G02B23/2423 ,  G01B11/022 ,  G01B11/03 ,  G02B23/2461 ,  G02B23/2484 ,  G02B27/425 ,  G06T7/521 ,  G06T2207/10068 ,  H04N5/2253 ,  H04N5/2254 ,  H04N5/2256 ,  H04N2005/2255

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.