The spectral distribution or spectral composition details the relative quantity of each wavelength, or color, that a light source is composed of.Test SetupValues for the luminous flux of each LED product are obtained by measuring luminous intensity distribution using a Type C goniophotometer¹. The...
通过升降机构,横移机构和间套定位块完成LED芯片Z轴升降,Y轴和X轴横移,实现可调式配光测试. By the lifting mechanism, sliding mechanism and the positioning block complete sets of LED chip Z-axis movements, Y-axis and the X axis sliding achieve adjustable light distribution test.张自平张洪建刘立芳...
[4] ENERGY STAR Lamps V2.1 Recommended Practice-Light Source Flicker[S]. [5] NEMA Standards Publication 77-2017 Temporal Light Artifacts: Test Methods and Guidance for Acceptance Criteria[S]. [6] CIE Technical Note-Visual Aspects of Time-Modulated Lighting Systems-Definitions and Measurement Models...
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b、要求对光通量和色参数进行测试,具体的测试方法并没有严格规定。下面是标准中的原话:Photometric measurements shall be in conformance with the appropriate laboratory method for the LED light source under test c、对环境控制、Tc的温度控制、供电设备有较高的要求。
下面是标准中的原话:Photometric measurements shall be in conformance with the appropriate laboratory method for the LED light source under test c、对环境控制、Tc的温度控制、供电设备有较高的要求。 d、对样品和老化过程的追踪和记录有详细的要求。 二、LM79 IES LM-79即固态照明产品的光、电测量方法。
发光效率ηv的计算如下列公式(6)所述,为待测固态照明产品的总光通量ΦTEST除以总消耗功率PTEST,此指标是用以评估固态照明电光效能转换的重要指标。 ………公式(6) 固态照明在颜色特性的量测上包含色度坐标、相对色温、演色性,对于固态照明其颜色特性在不同的空间角度可能是不同的,LM-79规范在第12.1至12.2节当...
l NEMA 77-2017 Temporal Lighting Artifacts: Test Methods and Guidance for Acceptance Criteria l California Title 24 l 中国GB/T 9473-2017《读写作业台灯性能要求》对提出频闪作为考虑因素,但“闪烁的试验和评估方法尚待确定” 我们选购灯具的时候应该怎么看其性能参数呢,在这里小编整理了其中一部分标准供读者...
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[4] ENERGY STAR Lamps V2.1 Recommended Practice-Light Source Flicker[S]. [5] NEMA Standards Publication 77-2017 Temporal Light Artifacts: Test Methods and Guidance for Acceptance Criteria[S]. [6] CIE Technical Note-Visual Aspects of Time-Modulated Lighting Systems-Definitions and Measurement Models...