method of measuring optical properties of high power LED and apparatus for measuring optical properties of high power LED

摘要

The present invention relates to a method for measuring optical characteristics of a high-power LED, which improves measurement repeatability and enables stable measurement, and a measuring apparatus thereof. The method for measuring optical characteristics of a high-power LED according to an embodiment of the present invention comprises the steps of: obtaining a junction voltage and a junction temperature of an LED for reference setting from an instantaneous response curve of the LED for reference setting by time zone; searching for a control range of the junction temperature for the junction voltage to be maintained constant within a stable time zone of the instantaneous response curve; applying power to an LED for inspection and controlling the junction temperature within the searched control range of the junction temperature so that a junction voltage of the LED for inspection is maintained constant within the stable time zone; and measuring optical characteristics of the LED for inspection within the stable time zone.