NPL (National Physical Laboratory), Teddington, U.K.

NPL is the UK's National Metrology Institute, developing and maintaining the national primary measurement standards. It is a Public Corporation owned by the Department of Business, Energy and Industrial Strategy (BEIS). It has a partnering agreement with BEIS and the University of Strathclyde and the University of Surrey. NPL is part of the National Measurement System (NMS) which provides the UK with a national measurement infrastructure and delivers the UK Measurement Strategy on behalf of BEIS.

https://www.npl.co.uk/surface-technology/label-free-chemical-imaging