关于半角和全角

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0°15°30°45°60°75°90°
-15°-30°-45°-60°-75°-90°0%
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50%光强FWHM/50%100%10%10%100%R,G,B FWHM 15R 10%45半高全宽角度:为光强与光强之间光束夹角一半值:光强与光强之间的光束夹角(也是我们通常定义的全角的一半)
案例中:曲线代表的角度全部为为)曲线的值角度为:(全角为)曲线的角度为:(也就是我们通常说的半角)半角值(全角为)曲线的值角度为:(全角为)半角和全角两个参数的定义才能使灯具的光效设计更加准确!
°(30°
°90°
G 30°60°
B 40°80°
10%10%Appendix:
Sourced fr Ledic catalogue.
*Ledic 50%10%中国国内定义并不严谨和准确,在的目录中标示就有矛盾的地方!
国际上通常没有半角和全角这个概念,而是和值(角度)!!!
Half angle:50% light intensity (FWHM)Full angle: 90% light intensity For Curve A,B, and C → half angle 30°Full angle : Curve A = 80° Curve B = 60° Curve C = 50°Full angle definition is more accurate as it allows the luminaries designer to arrange/ develop their LED
lamp.LED requirements: - LED brand/ type - MCPCB layout (arrangement) - MCPCB 2D drawing; LED position is critical Mechanical requirements: - Dimension limitations: - Mounting method: Screw/ Thermal mount/ Glue - Waterproof: Rubber ring height/ Silicon Installation conditions: Optical requirements - Pole Arrangement - Uniformity - Pole Height (H) - Min lux - Pole Distance (D) - Avg lux - Pole tilt angle (θ) - Cd / m²(Uo / UI /TI) - Pole arm length (L) - Type1~Type5 - Road Width: (W) - Optical requirements The asymmetry street lighting lens designed by Ledlink Optics Inc. is aiming to focus light and make the asymmetric beam pattern. Because of the lens, light can be focused and used upon customer’s demand. The optics lens reduce spill light from arcade and redirect light to the street resulting in increased several times of luminance intensity and illumination brightness. Thus, a secondary optical lens is a way to save energy cost and LED requested amount, as well as it can maximize LED performance.34
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Page Definition of Beam Angle Street Lighting。