High Precision Rotation Luminaire Goniophotometer

What is the definition of goniophotometer?

LSG-1890B/LSG-1800A goniophotometer is automatic goniophotometric instrument for luminous intensity distribution measurement with facility for rotating the light source. The LSG-1890B/LSG-1800A uses a constant temperature detector, Japanese motor and German precision angle coder which keep the test results with high accuracy. It is used for industrial laboratory photometric data measurement of all kinds of luminaries such as LED luminaries, HID lamps, fluorescent lamps and so on.

High Precision Rotation Luminaire Goniophotometer

Standard:
LM-79-19 “Optical and Electrical Measurements of Solid State Lighting Products”
EN13032-1 “Light and lighting – Measurement and presentation of photometric data of lamps and luminaires – Part 1: Measurement and file format; German version EN 13032-1:2004+A1:2012”
CIE-121 ” The Photometry and Goniophotometry of Luminaires”
CIE-70 “ The Measurement of Absolute Luminous Intensity Distribution”
IES LM-75  “GoniophotometerTypes and Photometric Coordinates”

Measurement:
Luminous Intensity Data, Luminous Intensity Distribution, Zonal Luminous Flux, Luminaires Efficiency, Luminance Distribution(Option), Coefficient Of Utilization, Luminance Limitation Curves Glare, Maximum Ratio of Distance to Height, Equal Illuminance Diagrams, Curves of Luminaires VS Lighting Area, Isocandela Diagrams, Efficient Luminescence Angle, EEI, UGR, etc.

Specification:
• The goniophotometric instrument can do the B-β test with two pillars and the C-γ test with single pillar & multi-function jigs
• Test max luminaires size and weight: LSG-1890B is 2000mm/60kg and LSG-1800A is 1600mm/50kg
• The tested luminaries rotates around an angle of (γ)±180°(or 0-360°) and the tested luminaries rotates around itself with an angle of (C)±180°(or 0-360°)
• Angle accuracy: LSG-1890B is 0.1°, LSG-1800A is 0.2°
• Photometer Detector Accuracy: Constant temperature photo detector Class A (Class L is optional)
• Testing Accuracy: 2%(Under Standard lamp); Stray Light: less than 0.1%
• English version software can run in Win7, Win8, Win10, Win11
• LISUN goniophotometer software can export CIE, IES, LDT and other format files. These kinds of format files can be transferred by other illumination and luminaire design software such as DiaLux

Note: The LSG-1890B is an update version of LSG-1800B and LSG-1800X. The LSG-1800A is an update version of LSG-1700B and LSG-1800.

The following Photo Detectors are optional to test UV light or LED with high accuracy:

What are the types of goniophotometers?

The types of Goniophotometers can be basically divided into Type A, Type B and Type C. For a detailed description, please refer to the 1987 edition of CIE 70. The difference between them lies in the way the lighting equipment rotates during the measurement and the photometric data obtained during this measurement.

What and how does a goniophotometer measure?

Goniophotometer is a instrument used to measure the light distribution performance of lamps. Goniophotometer measures the spatial light intensity distribution of lamps or light sources, total luminous flux and lamp efficiency and other parameters.

Goniophotometer need to work in larger darkroom. Use low-reflectivity materials in the room to avoid reflected light from entering the photo detector. The goniophotometer tests the illuminance and light intensity of the lamp at all spatial angles to calculate the absolute luminous flux value of the lamp and all other photometric parameters related to the space.

LISUN LSG-1890B High Precision Rotation Luminaire Goniophotometer – After-sales Frequently Asked Questions (FAQ).
LISUN LSG-1890B High Precision Roation Luminaire Goniophotometer were in the market for more than 10 years, LISUN engineers service team already summary the most of the After Sales Questions and Answers in the above link. Please read it carefuly, you can solve the most of the problems by yourself if you have some questions while using the instruments. LISUN will be continue to update this pages and more FAQ can be found in this topic link.

Steve Gibbons

We have the LSG-1800BCCD gonio photometer. LISUN is professional and the photometer is nice. LISUN engineer came and installed for us. Now everything is functional. We are glad to cooperate with LISUN.