Luminance and Radiance Detectors

LDM-9810 and LDM-9811 are modularly designed optical housings with viewfinder that are combined with PD-16 series detectors to form spot luminance and radiance measurement detectors with adjustable spot size selection. Both units are built using stable aluminum housings with standard tripod mounting socket to ensure precise measurement in the laboratory or in the field.

LDM-9901 is a high quality photometric detector for fast accurate luminance measurement in cd/ m2 of larger area sources, displays, screens and other VDUs.

The detectors are supplied with a 2m long coaxial cable with selectable -1, -2 or -4 type connector for use with Gigahertz-Optik’s range of optometers. Internationally traceable calibration & certification of luminance in cd/m2 is provided.

LDM-9810 Light Detector LDM-9811 Light Detector LDM-9901 Light Detector
LDM-9810: Luminance & Radiance Detectors LDM-9811: Luminance & Radiance Detectors LDM-9901: Luminance Detector


Model

Spectral Function

Wavelength Range

Input Optic Ø

F.O.V. or  Active Area

Units of
Measurement

Housing
Dimensions

Typical Sensitivity

nm

mm

Diameter  or
W x H

Length
mm

Luminance & Radiance Detectors

LDM-9810 + PD-16VL01

Photopic

380-780

-

20’, 1° & 6° 

cd/m²

64mm

216

0.033nA/cd·m2

LDM-9811 +
PD-16RW05

Radiometric

400-1000

-

1.7, 11 & 100 mrad

W/m²·sr

64mm

216

12nA/W/m2·sr

LDM-9901

Photopic, f1<5%

380-780

-

cd/m²

30x145mm

106

25pA/cd·m2

SRT-M37 Lens Barrels in 1, 2, 5 & 10 ° FOVs are available for the VL, RW and UV series detectors for luminance & radiance Set-ups

Calibrated & Certified To International Standards
All optical radiation detectors are calibrated and certified by Gigahertz-Optik's calibration laboratory with both absolute sensitivity data and spectral responsivity plot provided.