Lisun Group Product: LSG-1900 Moving Detector Goniophotometer

LSG-1900 Moving Detector Goniophotometer completely meets LM-79 Clause9.3.1requirement. The LSG-1900 is an automatic light distribution intensity 3D curve testing system for measuring light. The measuring distance is from5mto30m. It can measure all types of lighting sources, LED or HID luminaires such as indoor and outdoor luminaires, roadway luminaires, street lamps, flood lights and other kinds of luminaires.

Measurement:

Luminous Intensity Data, Luminous Intensity Distribution, Zonal Luminous Flux, Luminaries Efficiency, Luminance Distribution, Coefficient Of Utilization, Luminance Limitation Curves Glare, Maximum Ratio of Distance to Height, Equal Illuminance Diagrams, Curves of Luminaires VS Lighting Area, Lsocandela Diagrams, Efficient Luminescence Angle Etc.

Features:

Many national patents pending on hardware and software.

CIE Class A & Constant temperature photo detector (Class L detector can be optional).

High degree of intelligent and test function is complete.

The rotation motor is from Japan MITSUBISHI MOTORS and it uses Germanic Angle decode system, it will help smoothly and high accuracy rotation. It is very stable when start and stop.

The working principles are according to IESNA and CIE. This instrument is specially recommended by LM-75, LM-79 and CIE121-1996.

With some optional instruments, it has good expanding functions

The position and working state remain the same as it is under working.

Special collimation device with laser cross line, conveniently and accurately fix the position of the tested luminaries.

Specifications:

The tested luminaire rotates around the mirror with an angle of (γ)±180°(or 0-360°) and the tested luminaire rotates around itself with an angle of (C)±180°(or 0-360°).

The accuracy of angle: 0.1° Resolution of angle: 0.01°

Accuracy of photometry: CIE class A (Standard Class) or Class L.

The test result can be exported as CIE, IES, LDT and other format files. This kind of format files can be transferred by other illumination and luminaire design software such as DiaLux.

RS-232Cstandard interface can be connected to PC, English version software can run in WinXP or Win7

Detailed information about goniophotometer console

This component contains all of the system’s electrical and electronic controls. Main power switches and a test lamp voltage adjustment are included in the goniophotometer console. A hand-held control box is also attached to the unit on a long cable so the test operator can walk around the lab and manually position the luminaire during test set-up. A remote Yokogawa power analyzer meter is installed which incorporates a large digital display of volts, amps and watts.

The goniophotometer measures the exact lamp characteristics by use of remote sensing leads to the test luminaire. An option for measurement of Power Factor and Total Harmonic Distortion is available. An additional benefit of this system is that the power measurements on the ballast secondary of a high intensity discharge lamp are also facilitated.Readingsare transmitted to the computer and displayed so that all electrical monitoring can be done from the computer station. Automated voltage or power adjustment controlled throughout the test by the computer is also available as an option.

Detailed information for integrating sphere materials

Integrating sphere is important for the measurement but how many people have a clear understanding of its material? How many people know its component in a detailed way? I think it remains to be debated. Now please fix your attention on the following articles, and it is bound to surprise you.

The integrating sphere‘s lining optical properties greatly affect its measurement accuracy. Different coatings must be used at visible, infrared and ultraviolet wavelengths. High-powered light sources may heat or damage the coating, so an integrating sphere will be rated for a maximum level of incident power. Different kinds of coating materials are used. Early experimenters used a deposit of magnesium oxide. Barium sulfate has a useful flat reflectance over the visible spectrum. Finely-deposited gold is used for infrared measurements. Various proprietary PTFE compounds are also used for visible light measurements.

The theory of an integrating sphere assumes a uniform inside surface. Ports for detectors and sources must be small, not more than 5% of the surface area of the integrating sphere, for the theoretical assumptions to be valid. Unused ports in commercially built spheres may have matching plugs made up, with the interior surface of the plug coated with the same material as the rest of the integrating sphere. A baffle may be inserted in the integrating sphere so that the direct path of light from a source to a detector is blocked, since this light will have non-uniform distribution.

LSG-2000 Goniophotometer with Rotating Mirror - Lisun Group

LSG-2000 Goniophotometer with Rotating Mirror (Moving Mirror Goniophotometer) completely meet LM-79 Clause 9.3.1. The LSG-2000 is an automatic light distribution intensity 3D curve testing system for measuring light. The measuring distance is from 5m to 30m. It can measure all types of lighting sources, LED or HID luminaires such as indoor and outdoor luminaires, roadway luminaires, street lamps, flood lights and other kinds of luminaires.





Measurement:
Luminous Intensity Data, Luminous Intensity Distribution, Zonal Luminous Flux, Luminaries Efficiency, Luminance Distribution, Coefficient Of Utilization, Luminance Limitation Curves Glare, Maximum Ratio of Distance to Height, Equal Illuminance Diagrams, Curves of Luminaires VS Lighting Area, Lsocandela Diagrams, Efficient Luminescence Angle Etc.

Features:
Many national patents pending on hardware and software.
CIE Class A & Constant temperature photo detector (Class L detector can be optional).
High degree of intelligent and test function is complete.
The rotation motor is from Japan MITSUBISHI MOTORS and  it uses Germanic Angle decode system, it will help smoothly and high accuracy rotation. It is very stable when start and stop.
The working principles are according to IESNA and CIE. This instrument is specially recommended by LM-75, LM-79 and CIE121-1996.
With some optional instruments, it has good expanding functions
The position and working state remain the same as it is under working.
Special collimation device with laser cross line, conveniently and accurately fix the position of the tested luminaries.

Specifications:The tested luminaire rotates around the mirror with an angle of (γ)±180°(or 0-360°) and the tested luminaire rotates around itself with an angle of (C)±180°(or 0-360°).
The accuracy of angle: 0.1° Resolution of angle: 0.01°
Accuracy of photometry: CIE class A (Standard Class) or Class L.
The test result can be exported as CIE, IES, LDT and other format files. This kind of format files can be transferred by other illumination and luminaire design software such as DiaLux.
RS-232C standard interface can be connected to PC, English version software can run in WinXP or Win7

LSG-2000 can be used with a USB CCD Spectrometer to test spatial CCT Distribution and other Spectral color parameters. We call this system "Goniospectroradiometer (LSG-2000CCD)".
Please refer to this document: A Near-field Goniospectroradiometer for LED Measurements
PDF version: A Near-field Goniospectroradiometer for LED Measurements

If you want to test light sources - integrating sphere and goniophotometer are very important instruments

Light Measurement: Integrating Sphere and Goniophotometer

Integrating sphere and Goniophotometer mesurement.
The integrating sphere can measure the total light output of a lamp quickly without inaccuracy.but there is certain requirement for the position of the lamp when it is being tested,for example,the lamp being tested has to be placed in the center of the integrating sphere. Moreover,there is a light meter on one side of the integrating sphere ,it is used to measure the light output of the lamp. There is a baffle between the lamp and the light meter which is to stop the light meter from seeing any direct light from the lamp.The inside of the integrating sphere (including the baffle) is coated with a very white paint ,the white paint can reflect all wavelengths equally. This allows us to get the correct measurement values we want.
It is crucial that there is nothing else in the integrating sphere besides the lamp and the baffle. If anything else is placed in the sphere, like a fixture, would absorb some of the light. So that is to say,something  besides the lamp and baffle is placed in the sphere, not all of the light reaches the light meter and this leads to wrong meter readings. This means that we can only obtain "bare lamp" readings in the   integrating sphere. The integrating sphere cannot measure the light output of the lamp in fixture (which the goniophotometer can).