LDM-9901 Luminance Detector

The LDM-9901 Luminance detector is designed with a chromatically corrected lens for a measurement distance independent V(λ) match of equal to or better than 5% to the DIN CIE standard. Its field of view is 1° and the measurement distance range 40 cm to infinity. The fixed field-of-view detector has no focusable viewing optics. To target the object to be measured, the LDM-9901 has a notch and bead sight which has marks for near and far field distances. The LDM-9901 design offers a very low stray light level important for high luminance contrast measurements. The detector is supplied with a 2m long coaxial cable with selectable -1, -2 or -4 type connector for use with Gigahertz-Optik’s range of optometers. Calibration of luminance in cd/m² or footlamberts (fL) is performed at Gigahertz-Optik’s Calibration Laboratory for Optical Radiation Quantities.