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Schematic eye for fundus detection and using method thereof

A model eye and film technology, applied in the field of model eye, can solve the problem of not considering the state of the human eye, and achieve the effect of simple structure and good versatility

Pending Publication Date: 2018-02-02
浙江省医疗器械检验院
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  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

This method is measured in the air and does not take into account the actual state of the human eye. It is a theoretical method

Method used

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  • Schematic eye for fundus detection and using method thereof
  • Schematic eye for fundus detection and using method thereof
  • Schematic eye for fundus detection and using method thereof

Examples

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Embodiment Construction

[0021] The application will be further described below in conjunction with the accompanying drawings. figure 1 Middle left is front, right is back.

[0022] refer to figure 1 It is a model eye for fundus testing. The model eye is composed of three optical lenses, a film 4 with a field angle scale and a resolution line pair. The entire lens is sequentially the first lens 1, the second lens 2, the third lens 3, and the negative film 4 from the object side to the image side. The adjacent surface is close to each other, and the field angle scale and the resolution line pair are arranged on the adjacent surface of the negative film 4 and the third lens 3 (the arc surface at the front of the negative film 4 ).

[0023] The first lens 1 is a convex lens, the radii of the front surface and the back surface are 8 and -14.027 respectively, the center thickness is 4.5, and the material is K9 glass; the second lens 2 is a concave lens, and the radii of the front surface and the back su...

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Abstract

The invention provides a schematic eye for fundus detection and a using method thereof. The schematic eye is composed of three optical lenses and a photographic film, wherein the photographic film isprovided with a field angle scale and a resolution line pair. According to the schematic eye, the first lens, the second lens, the third lens, and the photographic film are arranged in sequence from an object space to an image space. The adjacent sides among the first lens, the second lens, the third lens and the photographic film are closely in contact with one another. The field angle scale andthe resolution line pair are arranged on the arc face in the front portion of the photographic film. The invention further provides the using method of the schematic eye. The refractivity difference between an optical structure and the optical lenses or lens groups simulates an actual human eye dioptric system. The field angle scale and the resolution line pair which are formed in the photographicfilm meet the index requirements in ISO10940. Besides, the using method of the schematic eye replaces a method in the ISO10940, and the schematic eye for the fundus detection is used for detecting the field angle and the resolution of fundus imaging check medical equipment represented by fundus cameras.

Description

technical field [0001] The present application relates to a model eye for fundus detection, which is suitable for use as a model eye to detect the performance indicators of fundus imaging inspection medical devices represented by fundus cameras. Background technique [0002] Fundus imaging inspection medical devices mainly include fundus cameras, fundus imaging machines, fundus scanners, etc. Among them, the fundus camera is a typical representative, which records and saves the fundus in the form of black and white or color photos, so as to diagnose fundus diseases. Its main optical properties include resolution, field of view, etc. The accuracy of these performance indicators is directly related to the effectiveness of diagnosis, and further to the safety of patients' eyes. The international standard IS010940 "Fundus Camera for Ophthalmic Instruments" for fundus camera products has been released. Currently, the resolution, field of view and other measurement methods in the...

Claims

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Application Information

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IPC IPC(8): A61B3/12A61B3/14A61B3/00G09B23/28
CPCA61B3/0025A61B3/12A61B3/14G09B23/28
Inventor 贾晓航彭建华王敬涛
Owner 浙江省医疗器械检验院
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