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Lens assembly for eyesight detection

A lens assembly and vision detection technology, which is applied in the field of vision detection to avoid inaccurate detection, ensure inspection results, and achieve clear images.

Pending Publication Date: 2021-12-03
ZHENGZHOU RAILWAY VOCATIONAL & TECH COLLEGE
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0003] Whether eyesight is short-sighted or not is usually detected by a visual acuity test table, and the orientation symbol E is printed on the visual acuity test table; Keep a certain distance on one side of the watch, and the person whose eyesight is to be tested observes the direction of the orientation symbol E printed on the vision test board with one eye to detect the vision of the person to be tested, but this setting method requires a larger venue Ensure that the person to be tested has a certain distance from the vision test table

Method used

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  • Lens assembly for eyesight detection
  • Lens assembly for eyesight detection
  • Lens assembly for eyesight detection

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0024] The present invention provides a lens assembly for vision detection, referring to figure 1 , figure 2 , as a specific embodiment, the lens assembly includes a box body 1, the box body 1 is provided with a detection port 10 communicating with the inside of the box body 1, and the box body 1 is provided with an icon assembly 2, a plane Mirror 11, semi-transparent mirror 12 and concave mirror 13, said icon assembly 2 includes a display screen 21 for displaying a detection icon, the reflective surface of said plane mirror 11 is arranged facing said display screen 21 and the The reflective surface 110 can reflect the light emitted by the display screen 21 to the concave reflector 13, and the half-transparent mirror 12 is arranged on the light path reflected by the reflective surface 110 and can reflect the concave reflector 13. 13 reflects the reflected light to the port 10.

[0025] By setting the display screen to display the detection icon, and passing the light to the...

Embodiment 2

[0037] Further, refer to image 3 , the present invention provides a lens assembly for visual acuity detection also includes a control system, the control system includes:

[0038] A storage module, the storage module is used to store image information of various icons, and is used to store "program information for adjusting the adjustment mode of the first linear adjustment component and the second linear adjustment member";

[0039] An adjustment module, including an adjustment handle, used to allow the inspector to adjust the size of the icon;

[0040] The execution module obtains the adjustment information of the adjustment module and transmits it to the storage module, and adjusts the first linear adjustment component and the second linear adjustment member according to the "adjustment" stored in the storage module. The program information of the mode” makes the first linear adjustment assembly and the second linear adjustment member work, thereby adjusting the distance ...

Embodiment 3

[0046] refer to Figure 4 , the present invention also provides a kind of method that adopts lens assembly to detect visual acuity, and this method comprises the following steps:

[0047] Step 1. The inspector observes one eye through the detection port, and blocks the other eye, and randomly displays icons through the display screen. The icons displayed on the display screen are transmitted to the detection port;

[0048] Step 2. The inspector chooses to manually adjust the size of the icon according to his own observation, and then answers the information of the icon or directly answers the information of the icon;

[0049] Step 3, the adjustment component adjusts the icon according to the tester's answer.

[0050] In step 2, when the inspector cannot or can clearly observe the current icon, which is quite different from his current vision, he can adjust the adjustment component by adjusting the handle, so as to adjust the size of the icon until the detection When the use...

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Abstract

The invention provides a lens assembly for eyesight detection. The lens assembly comprises a box body, wherein a detection opening communicated with the inside of the box body is formed in the box body; an icon assembly, a plane reflecting mirror, a semi-transparent and semi-reflecting mirror and a concave surface reflecting mirror are arranged in the box body; the icon assembly comprises a display screen used for displaying detection icons; the reflecting surface of the plane reflecting mirror is arranged in a way of facing the display screen; the reflecting surface can reflect light rays emitted by the display screen to the concave surface reflecting mirror; the semi-transparent and semi-reflecting mirror is arranged on a light path reflected by the reflecting surface and can reflect the light rays reflected by the concave surface reflecting mirror to the opening; through the principle of a concave surface mirror imaging light path, the axial distance can be stretched, so that the detection effect in a long distance can be simulated in a small range; the random switching of the detection icons can be realized by a detection method of displaying the icons through the display screen; and the phenomenon of detection inaccuracy due to the memory of a person to be detected on the detection icons is avoided.

Description

technical field [0001] The present invention generally relates to the technical field of vision detection, in particular to a lens assembly for vision detection. Background technique [0002] Eye examination is a very common routine health examination. The main part of the examination is the eye. There are many examination items, including vision examination and color recognition examination. During the examination, doctors need to use a lot of examinations Tools and inspection methods, these inspection tools or equipment are classified into different categories, each with its own inspection direction and scope, and the ophthalmology information obtained according to these inspection tools is of great reference value and significance. [0003] Whether eyesight is short-sighted or not is usually detected by a visual acuity test table, and the orientation symbol E is printed on the visual acuity test table; Keep a certain distance on one side of the watch, and the person whos...

Claims

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Application Information

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IPC IPC(8): A61B3/032A61B3/00G02B5/08G02B5/10
CPCA61B3/032A61B3/00G02B5/08G02B5/10A61B3/0016A61B3/0041
Inventor 刘意谷中秀李媛媛马宇马俊磊
Owner ZHENGZHOU RAILWAY VOCATIONAL & TECH COLLEGE
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