Abstract The structure, measuring principle and applying properties of a contact-type luminance meter are described. And a light source which can provide a uniform diffuse surface is presented and applied to calibrate three contact-type luminance meters. In comparison with the luminance standard in National Institute of Metrology for verifying contact-type luminance meters, this calibrating method shows good traceability and accurate certified value. Finally, the practicality of applying several commonly diffuse surfaces to calibrate contact-type luminance meters is discussed briefly.
LU Li-gen1,ZHANG Bao-zhou1,CHEN Chi 2, et al. Method and Apparatus for Calibrating Contact-type Luminance Meter[J]. Acta Metrologica Sinica, 2016, 37(3): 246-250.
2016, Vol. 37 
