Calibration tool for ophthalmology optical imaging and biological parameter measuring instrument and using method of calibration tool

Abstract

The invention relates to a calibration tool for an ophthalmology optical imaging and biological parameter measuring instrument and a using method of the calibration tool. The calibration tool comprises a first lens, a second lens and a PDMS mold body, wherein the first lens comprises a first curve and a first plane; the second lens comprises a second curve, a second plane and a third plane, and the second plane and the third plane are parallel; resolution ratio testing microspheres which are uniformly distributed are in the PDMS mold body; the first plane is attached to the second plane; the PDMS mold body is attached to the third plane and a part of the second curve; an empty chamber is formed between the third plane and the PDMS mold body; the first lens, the second lens, the PDMS mold body and the empty chamber are symmetric about the same axis; the curvature radius of the first lens is smaller than that of the second lens; a visual field angle scale and a resolution ratio line aligning pattern are arranged between the second curve and the PDMS mold body; and an image calibration line is arranged on the third plane.

Description

Technical field [0001] This application relates to the technical field of instrument detection, and in particular to a calibration tool for ophthalmic optical imaging and biological parameter measuring instruments and a method of use thereof. Background technique [0002] Fundus optical imaging obtains human eye structure information through two-dimensional or three-dimensional imaging technology, and is widely used in clinical diagnosis with its advantages of non-invasive and high precision. Fundus imaging diagnostic equipment mainly includes posterior segment optical coherence tomography scanners, fundus cameras, etc., as well as optical coherence tomography scanners with fundus photography functions, ophthalmic optical biometers and other equipment. The maximum measurable field of view of the fundus imaging medical equipment affects the imaging range, and the resolution determines the smallest resolvable structure size. They are important parameters that characterize the measu...

AI Technical Summary

Problems solved by technology

[0006] In order to solve the problem that the existing single calibration tool cannot detect or calibrate parameters such as field angle, resolution, depth measurement, eye axis length and signal-to-noise ratio of ophthalmic imaging equipment and ophthalmic biological parameter measuring instrument, the present invention discloses a A calibration tool for ophthalmic optical imaging and biological parameter measuring instruments and its application method. Its detection range covers parameters such as field of view, lateral resolution, axial resolution, depth measurement, eye axial length, and signal-to-noise ratio. , can be used for detection and calibration of ophthalmic optical imaging and biological parameter measuring instruments

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