Fabrication of precision apertures and methods to measure its area for use with irradiance and illuminance meters.

Project Description

Development of methods to reproduce apertures with accurately known area in the diameter range about 3-7 mm for usage in filter radiometers. Optical methods to measure aperture area will be examined. Diamond turned precision apertures developed and calibrated by NPL will be used as reference.

Photometry and Radiometry (PR)
Leif Liedquist, SP (Sweden)
Coordinating Institute
RISE (Sweden)
Participating Partners
Further Partners