Photometric Sphere Measurement extracts the luminous flux, luminous efficiency, color temperature, color rendering index properties of the lighting product. The interior of the sphere has been painted with a white, fully matte paint. In this way, the reflection property inside is accepted as 1. In short, integrated spheres have an inner surface made of one of several materials that reflect and emit light. Spectroradiometer head is used as detector in the measurement. When using this method, the LED light source whose total luminous flux is desired to be measured is compared with another light source whose total luminous flux is known. This light source is also called auxiliary lamp.
LM 79 ( EN 13032 )
- Total Luminous Flux ( Lm )
- Luminous Intensity ( Cd )
- illuminance Intensity ( Lx )
- Color Rendering Index ( CRI )
- Color Temperature ( K )
- Luminous Efficiency ( Lm / W )
.IES & .LDT
Color Coordinates (x, y)
Ta : 25 - 35 - 50°C
Goniophotometer Measurement is the process of measuring the light intensity at different angles by rotating the light source with the angle selected between 1 - 5 °.
The purpose of the goniophotometer device is to calculate the total light intensity emitted by the light source at 360°. Goniophotometry device calculates the one-, two- and three-dimensional distributions of the light emitted from the light source, that is, how much light flux it sends at which angle.
The results obtained with Goniophotometer
In which direction and at what level the light source sends the luminous flux
The rendering of the light source.
The peak angle of the light source.
Conical diagram of light
Illuminance curves and tables.
Using multiplier table.