Method for detecting mesoptic vision photometric quantity and double-photometry detection apparatus thereof

Abstract

The invention discloses a method for detecting a mesopic vision photometric value and a double-photometric detector thereof. The method comprises a step of adopting a photometric detector which is corrected by a photopic vision visual curve, and a photometric detector which is corrected by a scotopic vision visual curve. The method is characterized by measuring background luminance B under a mesopic vision environment condition by a luminance meter during measurement, and finding out the maximum value of luminous efficacy according to the background luminance B, thus determining the proportion of the scotopic vision visual curve and the photopic vision visual curve; and displaying the mesopic vision photometric value under the background luminance by computation according to the proportion of the scotopic vision visual curve and the photopic vision visual curve. The double-photometric detector which is obtained by the method for detecting the mesopic vision photometric value can measure the photometric value under mesopic vision environments, and can correspond with the human eye perception under the mesopic vision environment particularly at the time of designing road lighting, landscape lighting, or lighting of low-luminance trenches and tunnels, thus ensuring the optimum ambient lighting.

Description

technical field [0001] The invention relates to a photometric detection technology, in particular to a method for detecting the photometric value of intermediate vision and a dual-photometric detector thereof. Background technique [0002] The sensitivity of the human eye to radiation of various wavelengths is different, and it can perceive visible light in the range of 380-760nm. The visual process begins when light rays travel through a lens and converge on sensory cells at the back of the retina. There are two types of sensory cells, one is columnar cells and the other is cone cells. Columnar cells are more sensitive to light than cone cells. ) Vision plays a major role. However, under strong lighting conditions, its response to light tends to be saturated, so the columnar cells play little role in daytime (photopic) vision. Cone cells mainly play a role in photopic vision and are divided into three types with different phytochromes, which respectively respond to three...

AI Technical Summary

Problems solved by technology

[0003] At present, all photometric detectors used in the testing of electric light sources, lamps, light-emitting devices, and display devices are corrected by the photopic function curve. The measured data are provided for use under photopic conditions and are suitable for related lighting engineering design. But if it is used in an intermediate vision environment, it will produce a large deviation