Fig. 1. Measuring device for light distribution characteristics of infrared thermal radiation light source. (a) Schematic diagram; (b) physical photo

Fig. 2. Relationship between radiant flux and power-on time

Fig. 3. Angular distribution of radiant flux in different measurement schemes. (a) Group Ⅰ measurement; (b) Group Ⅱ measurement

Fig. 4. Relationship between relative radiant flux and angle

Fig. 5. Light distribution curve

Fig. 6. Relationship between radiant flux and power-on time under passive cooling

Fig. 7. Comparison of results of stable and rapid measurement

Fig. 8. Simulation of light distribution characteristic measuring device