Patent ID: 8830453

Claim:
A method for measuring intensity distribution of light comprising: (S 1 ) making a carbon nanotube array comprising a plurality of carbon nanotubes on a surface of a substrate, wherein the carbon nanotube array comprises a top surface away from the substrate; (S 2 ) placing the carbon nanotube array with the substrate in an inert gas environment or a vacuum environment; (S 3 ) irradiating the top surface of the carbon nanotube array with a light source to make the carbon nanotube array radiate a visible light and the angles between the plurality of carbon nanotubes and the surface of the substrate are in the range from about 10 degrees to 90 degrees; (S 4 ) placing a reflector to reflect the visible light; and (S 5 ) imaging the visible light reflected by the reflector with an imaging element to obtain an intensity distribution of the light source.