Independent pointing type naked eye vision screening system

Abstract

The invention discloses an independent pointing type naked eye vision screening system. The independent pointing type naked eye vision screening system comprises a control module, two simple eye directional transmission devices, a distance measuring device, a dichroic mirror, and an interaction device, wherein each simple eye directional transmission device comprises a backlight module, a linear fresnel lens and two 60HZ liquid crystal display image layers of certain dimensions; the distance measuring device is used for measuring the distance between a tester and the image display layers; thecontrol module is used for controlling the simple eye directional transmission devices to respectively project a left eye image and a right eye image; the dichroic mirror is arranged between the two simple eye directional transmission devices, 45 degrees are formed between the dichroic mirror and each of the two simple eye directional transmission devices, and the dichroic mirror is used for changing the transmission direction of light paths; and the control module is used for detecting the visual function of the tester according to an input signal and test images. Through the adoption of theindependent pointing type naked eye vision screening system disclosed by the invention, sight screening of different depth distances including 50cm, 1m, 3m, 5m and the like can be realized at the sametime, so that intelligent sight screening which is low in consumption, high in efficiency, low in volume, high in accurate degree and the like is really realized, and the independent pointing type naked eye vision screening system can be better suitable for the respect of medical apparatuses.

Description

technical field [0001] The invention belongs to the field of medical vision inspection equipment, and more specifically, relates to an autonomous pointing naked-eye vision screening system. Background technique [0002] With the rapid development of science and technology, more and more electronic products have entered our lives. When we enjoy the variety of these electronic products, we often ignore the fatigue of our eyes. In fact, most of the information obtained by humans comes from the human visual system. [0003] However, for contemporary society, the year-by-year increase in the incidence of myopia among students is a worldwide problem, and the highest incidence of myopia is in Asia. According to statistics: At present, there are about 300 million people with myopia in my country, accounting for about 1 / 3 of the world's myopia. In view of this data, juvenile myopia should cause the country to attach great importance to it. Therefore, the protection of eyes should ...

AI Technical Summary

Problems solved by technology

The traditional inspection method requires the assistance of doctors, which increases labor to a certain extent; second, the use of baffles increases consumables to a certain extent; third, during the test process, baffles can cheat through light leakage and oppress the eyeballs to a certain extent, causing test inaccuracy

[0005] In addition, the naked-eye 3D display with pointing backlight realizes its vision screening function to a certain extent and solves the above problems, but it needs a 120HZ liquid crystal display panel, and the color loss in the 3D display process is caused by liquid crystal drive problems when the temperature is low; in addition, E The word table display image is about 21cm, which can realize all displays. At present, it is difficult to find an LCD panel with 21cm and 120HZ refresh rate in the market, which reduces the screen ratio to a certain extent.

Third, it is limited to the backlight and the lens. In view of the crosstalk problem, it is difficult to realize the vision detection of physical positions such as 50cm, 1M, 3M, and 5M at the same time.

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