HiDyn Deliverable D1 - Report describing the design, development and technical specification of a type of high-contrast-luminance reference standard (covering at least 6 orders of magnitude), including the determination of luminance with an expanded uncertainty no larger than 1 % for the brightest source and no larger than 2 % for the dimmest one

A high-contrast luminance reference source (Hidyni) was developed, as part of HiDyn project at Czech metrology institute (CMI) in collaboration with Agencia Estatal Consejo Superior de Investigaciones Científicas (CSIC), for characterizing high-dynamic-range (HDR) Imaging Luminance Measurement Devices (ILMDs) or other imaging measurement devices dedicated to the evaluation of indoor or outdoor lighting conditions. The source consists of seven independent luminance modules that cover six orders of magnitude of luminance, ranging from 0.1 cd/m2 to 100 000 cd/m2. The modules can be used simultaneously or separately in any geometrical arrangement. The Hidyni comprises a light trap for background signal evaluation. The diameter of the luminous area of the modules is adjustable (from 25 mm and smaller). The position of the modules can be adapted to suit different imaging devices, to cover various field-of-views. Each module has a lockable articulating platform for the source-camera alignment and most components to be manufactured are based on 3D-printing with the design data provided as open access. The Hidyni was fully characterised and the luminance of each module was calibrated. The development of the proposed Hidyni is inexpensive and simple to reproduce by other producers, which was demonstrated by METAS, who successfully reproduced the Hidyni modules following this guide.