RETRO-REFLECTIVE SHEET MATERIAL

Reference material for monitoring of retro-reflection measurement systems

The specimen consist of retro-reflective sheet material based on micro-sphere reflection properties, thus providing a robust calibration value. The default size amounts to 100 mm x 100 mm on a carrier with a thickness of 3mm.

Samples with different colours (white, yellow, amber and red) are available, each of them with certified coefficients of luminous intensity (CIL, in mcd/lx) at observation angles of 20 and 90 minutes of arc. Calibrated values are of course traceable to a national metrology institute.

Optionally, a specimen holder is available, creating a minimum of background signal. The fixture attaches easily to LMT’s goniophotometer tables, but may be used as well with optical benches.