LDM-9810-PD-16RW05 Radiance Detector
LDM-9810 Viewing Module
PD-16RW05 Radiometric Detector

LDM-9810 is a modularly designed viewing module that combined with the PD-16RW05 detector forms a spot radiance measurement system for the 400 to 1000nm wavelength range with selectable viewing angles for different spot size diameters. The viewing module is built with stable aluminum housings to ensure precise measurement in laboratory or field use. The unit’s wide aperture focusing objective is achromatically corrected, and satisfies the tightest requirements for the suppression of stray light and image formation. The selectable fields of view are 20', 1^o and 6^o. A FOV selector knob is located on the rear of the device. The resultant size measurement spot is visible through the ocular viewfinder. In combination with the cross-hair targeting aid alignment of the LDM-98 to the zone of interest is simple. Focusing is achieved by adjusting the sharpness of the image on the viewfinder screen. The useable measurement distance of the LDM-98 spans from 0.3m to infinity. The area of the measured surface depends on the distance to the target and on the angle chosen for the field of view. The LDM-98NL narrow lens adapter provides a variable 1:1 to 2:1 near field magnification for measurement of spot diameters down to 0.1mm diameter. The detector offers 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 W/(m²*sr) is performed at Gigahertz-Optik’s Calibration Laboratory for Optical Radiation Quantities.