EOP-optical probe for measuring irradiance

Instrument Systems offers a series of EOPs for measuring irradiance and general radiation coupling. The main differences between these EOPs are optical throughput, cosine correction degree and spectral range. All EOP optical probes include a diffuser for scattering incident light. Behind the diffuser is the entrance face of the optical fiber through which the light is coupled to the spectrometer.

application

For general applications, it is recommended to use the optical probes EOP 120 and EOP 121 (transverse fiber bundle connector) because they can achieve the best compromise between good cosine correction and good light throughput.

A good to excellent cosine correction is required to measure extended light sources, although this always comes at the cost of light throughput. The optical probe EOP-146 is suitable for this purpose.

The optical probe EOP 140 is only suitable for applications that require high light throughput. Model EOP 542 is suitable for fixed field of view (5.7o) measurement, mainly used to measure direct sunlight.

Instrument Systems provides the integrating sphere ISP 40, which can realize the optimal cosine correction in a wide spectrum range. Due to the integral effect of the sphere, the entire beam will be captured regardless of beam convergence or divergence, and coupled with the spectrometer through the fiber bundle.