Method and experimental device for carrying out vision measurement by adjusting objective and background luminance

Abstract

The invention relates to a method and experimental device for carrying out vision measurement by adjusting objective and background luminance. According to the method and experimental device for carrying out the vision measurement by adjusting the objective and background luminance, a colorless dull polish film is used as an attenuation sheet to control the luminance of an objective light source, diffuse reflection white foam of high reflectance is used for reflecting changes of the luminance of a background control light source, under the situation that the luminance of the objective light source or the luminance of the background light source in a visual field is maintained to be unchanged, the luminance of one of the objective light source or the background light source is changed in an infinitely variable mode to achieve different objective contrast ratios, a standard logarithmic visual acuity chart is taken as an observation visual standard in a hollow mode, and therefore the vision degrees under contrast ratios of different objectives are measured. The method and experimental device for carrying out the vision measurement by adjusting the objective and background luminance can enable illumination levels under all kinds of visual conditions to be simulated, can quantitatively evaluate the quality of different types of light sources (such as LEDs, high pressure sodium lamps and high pressure mercury lamps) in illumination engineering, and can quantitatively measure the visual degrees of objectives in different illuminating levels (such as photopic vision, scotopic vision or mesopic vision).

Description

technical field [0001] The patent of the present invention relates to a method and an experimental device for visual measurement by adjusting target brightness and background brightness. In lighting engineering, the quality of different types of light sources can be quantitatively evaluated, and at the same time, the visibility of objects can be quantitatively measured under different lighting environments. Background technique [0002] In the lighting environment, the evaluation of the quality of the light source is limited to the analysis of the spectral distribution of the light source, and the visual effects of different types of light sources cannot be compared; the evaluation of whether the lighting environment meets the requirements of visual operations is measured by illuminance or brightness, but the indicators are only the majority. The statistical results of human subjective evaluation cannot directly reflect the observer's vision of the target. The experimental ...

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Problems solved by technology

[0002] In the lighting environment, the evaluation of the quality of the light source is limited to the analysis of the spectral distribution of the light source, and the visual effects of different types of light sources cannot be compared; the evaluation of whether the lighting environment meets the requirements of visual operations is measured by illuminance or brightness, but the indicators are only the majority. The statistical results of human subjective evaluation cannot directly reflect the observer's vision of the target.

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