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Method for improving vertical illumination uniformity of blackboard lamp

A technology of vertical illuminance and uniformity, which is applied to the components of lighting devices, lighting devices, lighting and heating equipment, etc. It can solve the problems of unclear light, poor uniformity, glare, etc., and achieve the goal of reducing glare and uniform illuminance Effect

Active Publication Date: 2020-10-13
广东视康照明科技有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0002] Because the existing blackboard lamps do not accurately and quantitatively analyze the illuminance of the light output of the lamps on the vertically arranged blackboard areas, it is not clear that the attenuation of light is inversely proportional to the square of the light propagation distance (optical path). When designing the optical system, the directional emission and light distribution of light, as well as the structure of the lens filter for light, lack a reasonable design, resulting in the light shining on the upper and lower areas of the blackboard, forming an abnormally bright and dazzling area near the lamp, and the distance from the lamp Far areas appear dim, with poor uniformity and glare

Method used

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  • Method for improving vertical illumination uniformity of blackboard lamp

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Embodiment 1

[0023] Determine the lens bottom thickness t 底 is 1mm, the horizontal distance x between the light source 1 and the wall 2 is 0.35m, and the vertical distance y between the light source 1 and the bottom of the blackboard 5 is 1.2m, calculate the thickness t of the top of the lens 顶 At this time, the illuminance of the blackboard lamp is uniform and the glare is less. When the illuminance uniformity of the blackboard surface is about 0.9, the unified glare value of the lamp is UGR≤15.

Embodiment 2

[0025] Determine the lens bottom thickness t 底 is 1.5mm, the horizontal distance x between light source 1 and wall 2 is 0.5m, and the vertical distance y between light source 1 and the bottom of blackboard 5 is 1.2m, calculate the thickness t of the top of the lens 顶 At this time, the illuminance of the blackboard lamp is uniform and the glare is less. When the illuminance uniformity of the blackboard surface is about 0.9, the unified glare value of the lamp is UGR≤15.

[0026] Through the reasonable light splitting design of the lens 4, after the light passes through the lens 4, less light is distributed and irradiated at a short distance, and more light is distributed and irradiated at a long distance, so that the illuminance of the blackboard lamp is uniform, reducing glare, and the illuminance uniformity of the blackboard surface When it is about 0.9, the unified glare value UGR of the luminaire is less than or equal to 15.

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Abstract

The invention discloses a method for improving vertical illumination uniformity of a blackboard lamp. The method comprises the following steps of (1) determining a horizontal distance x between a light source and a wall surface and a vertical distance y between the light source and the bottom of the blackboard; and (2) calculating a proportionality coefficient delta = LA / LC according to the top illumination LA = phi / x2 of the blackboard and the bottom illumination LC = phi / (x2 + y2) of the blackboard, manufacturing a long-strip-shaped lens protruding outwards, enabling the thickness of the lens to be gradually decreased from top to bottom, determining the top thickness t-top of the lens or the bottom thickness t-bottom of the lens according to actual size requirements, and calculating thetop thickness t-top of the lens or the bottom thickness t-bottom of the lens according to delta = the top thickness t-top of the lens / the bottom thickness t-bottom of the lens. According to the methodfor improving vertical illumination uniformity of the blackboard lamp, the manufactured blackboard lamp is uniform in illuminance and little in glare, when the illuminance uniformity of the blackboard surface is about 0.9, and the unified glare value UGR of the lamp is smaller than or equal to 15.

Description

technical field [0001] The invention relates to the technical field of lighting, in particular to a method for improving the uniformity of vertical illuminance of a blackboard lamp. Background technique [0002] Because the existing blackboard lamps do not accurately and quantitatively analyze the illuminance of the light output of the lamps to the areas above and below the vertically arranged blackboard, it is not clear that the attenuation of light is inversely proportional to the square of the light propagation distance (optical path). When designing the optical system, the directional emission and light distribution of light, as well as the structure of the lens filter for light, lack a reasonable design, resulting in the light shining on the upper and lower areas of the blackboard, forming an abnormally bright and dazzling area near the lamp, and the distance from the lamp Far areas appear dim, with poor uniformity and glare. Therefore, in order to avoid the shortcomin...

Claims

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Application Information

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IPC IPC(8): F21V5/04
CPCF21V5/04
Inventor 江栋梁傅少春刘睿
Owner 广东视康照明科技有限公司