Ophthalmic Optical Imaging and Biological Parameter Measuring Instrument Calibration Tool and Using Method

Abstract

The invention relates to a calibration tool for an ophthalmic optical imaging and biological parameter measuring instrument and a method for using the same. The calibration tool includes: a first lens with a first curved surface and a first plane; a second lens with a second curved surface and parallel second and third planes; and a PDMS phantom with a hollow chamber and a uniform Distributed resolution test microspheres, wherein the first plane and the second plane are bonded together, the third plane and the PDMS phantom are bonded together, the empty chamber is adjacent to the third plane, and the first lens, the second lens , the PDMS phantom and the cavity have a common axis, wherein the radius of curvature of the first lens is smaller than the radius of curvature of the second lens, and the bottom radius of the PDMS phantom is smaller than the radius of the third plane, wherein the second curved surface has a visual Field angle scale and resolution line pair pattern with spoke-shaped resolution test pattern and thin lines for image registration on the third plane.

Description

technical field [0001] The present application relates to the technical field of instrument detection, in particular to a calibration tool for an ophthalmic optical imaging and biological parameter measuring instrument and a method for using the same. Background technique [0002] Fundus optical imaging obtains eye structure information through two-dimensional or three-dimensional imaging technology, and is widely used in clinical diagnosis due to its non-invasive and high-precision advantages. Fundus imaging diagnostic equipment mainly includes posterior segment optical coherence tomography scanner, fundus camera, etc., as well as optical coherence tomography scanner with fundus photography function, ophthalmic optical biometer and other equipment. The maximum measurable field of view angle of fundus imaging medical equipment affects the imaging range, and the resolution determines the minimum resolvable structural size, which is an important parameter to characterize the m...

AI Technical Summary

Problems solved by technology

[0005] 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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