1. Luminous intensity detection refers to the intensity of light、 specifically the amount of light emitted within a specific angle range. LED light is relatively concentrated、 and the inverse square law is not applicable for detecting luminous intensity when the distance is close. The CIE127 standard proposes two conditions for measuring the average normal light intensity when implementing light intensity measurement、 namely measurement conditions A (far field condition) and B (near field condition). The two conditional detectors have the same area、 both of which are 1 cm2. At present、 standard condition B is generally chosen to measure the luminous intensity of LED lamps. 2. The luminous flux and luminous efficiency detection luminous flux are the luminous flux、 which refers to the total amount of light emitted by the light source. At present、 the main methods used for detecting the luminous flux of LED lamps are the integration method and the spectral method. The integration method involves sequentially igniting the tested lamp and the standard lamp within the integration sphere、 and then recording their readings on the photoelectric converter as ES and ED. Spectroscopy mainly uses spectral energy P( λ) Implement distribution calculation and finally detect light flux. The detection application instrument is a monochromator、 which measures the 380-780 nm spectrum of the standard lamp within the integrating sphere. Under the same conditions、 the measured lamp spectrum is measured、 and then comparative calculations are carried out to measure the measured luminous flux. Light efficiency refers to the ratio of the luminous flux emitted by a light source to its consumed power P>
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