Compact large-area uniform colour-selectable calibration light source

摘要: Solid-state lighting and display technology are under rapid development. Photometric measurement devices such as imaging systems or tristimulus sensors encounter complex spatial, spectral temporal conditions. Sufficiently large uniform calibration sources required to adequately match the field application facilitate acceptable uncertainties. We present a relatively compact, large-area source employing plate diffusers patterned mask. The is easily configured with colour-selectable, temperature-stabilized high power LED modules. achieve 99% spatial uniformity within 16?cm ? square Lambertian angular characteristics.