Goniophotometer

Fixed vertical axis perpendicular to the line of measurement, with a horizontal axis parallel to the main output direction of the light source Type C are single column structures.

[6] In order to measure the full angular distribution of a light source, the fisheye camera method can be used.

The method is based on employing a fisheye-lens camera installed into a port of an integrating sphere.

The camera simultaneously records the luminous intensity data for all angles of light emission, reducing the measurement uncertainty due to temporal effects, such as drift and temporal modulation of the light source.

The instantaneous nature of the camera measurement also significantly reduces the time required to obtain the luminous intensity distribution of the device under test, and is not affected by the angular resolution set for the measurement.