Illumination spectrum adjustable eyesight test system

A visual acuity test and spectrum technology, which is applied in the fields of eye testing equipment, medical science, diagnosis, etc., can solve problems such as uneven illumination, short life of fluorescent lamps, and stroboscopic presence

Inactive Publication Date: 2017-08-18
上海复展智能科技股份有限公司 +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

This eye chart has some defects: (1) uneven illumination; (2) color temperature can not be adjusted; (3) short service life of fluorescent lamps; (4) fluorescent lamps use 220V, 50Hz AC power supply, there is stroboscopic, easy to fatigue the eyes
[0004] The eye chart light box using LED as the light source can solve the problems of short life, uneven illumination and flickering of fluorescent lamps, but the current LED eye chart light box usually has a fixed color temperature and does not have the function of adjusting the spectrum
There is also a lack of vision testing systems for studying the effects of light spectrum on vision

Method used

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  • Illumination spectrum adjustable eyesight test system
  • Illumination spectrum adjustable eyesight test system
  • Illumination spectrum adjustable eyesight test system

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0023] Example 1: Simulated road lighting vision test in dry air

[0024] Such as figure 1 As shown, a vision testing system with adjustable lighting spectrum includes an eye chart light box 1 with adjustable spectral illuminance, a lighting fixture 2, a spectral illuminance meter (to measure vertical illuminance) 3, a spectral illuminance meter (to measure horizontal illuminance) 4, and an observation window 5, the ceiling 6, the ground 7, the wall 8, the lighting fixture LED control device 9, and figure 2 The heating device 12 is shown. The size of the test system is: the length is determined by the test distance specified by the eye chart, that is, the distance from the eye chart to the observation window is 5m; the width is the width of a lane, about 3.5m; the height is determined by the height of the eye chart and the suspension height of the eye chart. The 1.0 visual mark of the eye chart should be flush with the eyes of the subjects, the height of the eye chart is ab...

Embodiment 2

[0030] Implementation 2: Vision test in simulated fog

[0031] Such as figure 1 and figure 2 The vision test for simulating road lighting in fog is shown, and a device for simulating fog environment is added on the basis of implementation 1. Four fog inlets 10 are evenly distributed on the ceiling 6. There is an artificial fog generating device in the airtight enclosure structure of the system. The size and rate of fog droplets can be adjusted, and the fog droplets enter the test space through the fog inlets 10. The influence of spectrum and illuminance on human vision can be measured under different fog droplet diameters and concentrations, so as to understand the influence of road lighting spectrum on the visibility of small targets under different fog environments.

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Abstract

The invention belongs to the technical field of semiconductor lighting devices, and specifically relates to a visual acuity test system with adjustable lighting spectrum, which is characterized in that it is an eye chart light box with adjustable lighting spectrum, an enclosure structure with blackened inner surface, lighting lamps, and a spectral illuminance meter and control devices; the lighting source of the eye chart light box and the lighting fixtures of the enclosure structure include LED packaging devices whose spectrum can be changed synchronously; the vision testing system with adjustable illumination spectrum, people test their vision in the enclosure structure, and at the same time Adjust the spectrum of the eye chart light source and the ground lighting lamps, test the eyesight of the subjects, and study the influence of the lighting spectrum on the resolution of small targets on the road; asynchronously adjust the power of the eye chart light source and the ground lighting source, thereby changing the vertical illuminance and The horizontal illuminance of the ground is used to study the influence of illuminance on the visibility of small targets on the road.

Description

technical field [0001] The invention belongs to the technical field of semiconductor lighting, and in particular relates to a vision testing system with adjustable lighting spectrum. Background technique [0002] The optic nerve of the human eye has different photosensitivity to light of different wavelengths. The International Commission on Illumination (CIE) has determined the sensitivity of the human eye to light of different wavelengths, that is, the spectral luminous efficiency. The spectral luminous efficiency is related to the brightness, when the brightness is >3 cd / m 2 When it is photopic vision, the spectral luminous efficiency is represented by V(λ), with a peak at 555 nm; brightness <0.001 cd / m 2 When it is scotopic vision, the spectral luminous efficiency is represented by V'(λ), and the peak value is at 507 nm; when 0.001 cd / m 2 <brightness<3 cd / m 2 When it is intermediate vision, the spectral luminous efficiency is jointly determined by V(λ) and...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): A61B3/032
CPCA61B3/032A61B3/0008A61B3/0041A61B3/0075
Inventor 李福生李思琪韩秋漪李磊张善端
Owner 上海复展智能科技股份有限公司
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