In GMS-2200 Goniophotometer, the tested luminaire rotates only around the fixed vertical axis in the prescribed burning position and a reflecting mirror rotates around the horizontal axis, meanwhile, the mirror on rotating table in the opposite side rotates around the horizontal axis synchronously to pursuit the measuring beam reflected by the first mirror, and then reflect the measured beam perpendicularly towards to a fixed detector at the horizontal rotation axis. The combined motion of the luminaire and mirror permit the measurement of luminous intensity at the direction of any horizontal or vertical angle without titling the luminaire.

GMS-1600 goniophotometer is a type C goniophotometer used to measure the luminous intensity distribution, chromaticity uniformity and spatial spectrum distribution for LED lamp, PAR lamps, flush light panel and other small size lamps. The luminaire rotates around the vertical axis on its burning position while detector is rotating around the luminous center in the vertical plane. The goniophotometer has the advantages with fixed luminaire position, no mirrors in the optical ways, and less laboratory space occupied.

According to CIE IESNA National standards and other requirements require the use of rotating lamps to achieve multiple measurement methods such as B-β, A-α, and C-γ. Used for measuring the spatial light intensity distribution and various photometric parameters of indoor lighting fixtures, floodlights, and road lighting fixtures. Including: spatial light intensity distribution, light intensity distribution curve on any cross section can be displayed in rectangular coordinate system or polar coordinate system, spatial equal intensity curve, plane equal illuminance distribution curve, brightness limit curve, annular luminous flux, glare level, luminaire efficiency, effective luminous angle, upward light flux ratio, downward light flux ratio, total luminous flux of luminaire, effective luminous flux, utilization factor, as well as electrical parameters such as voltage, current, power, power factor, etc. It can work with double or single column.

There are three rotation axes in GMS-2000 goniophotometer. A precision reflecting mirror rotates around the horizontal axle and the tested luminaire rotates in the prescribed burning position and around the vertical axle, meanwhile, a synchronous axle will rotate toward the opposite direction synchronously. The combined motion of the luminaire and mirror permit light measurement at the direction of any horizontal or vertical angle without tilting the tested luminaire, therefore, the luminous intensity will be more stable. The photometer head located at a fixed position of the required photometric distance in front of the reflecting mirror to detect luminous intensity in each direction.

It is specially designed for accurate measurement of power LED devices, modules and lamps.