The direct entrance optic is a special designed telescope which allows the study of the direct irradiance of the solar radiation. It has a weatherproof housing and is designed for use with a quartz fibre. The optic has a field of view of about 1.5°. The outer dimensions allow easy mounting on common solar trackers.
The calibration can be done by applying the KS-J1011 portable spectral irradiance source and the appropriate adapters (KS-J1011-ADAPT-GLO + KS-J1011-ADAPT-DIR).

Direct entrance optic like J1004 with an internal SMA light guide for easy mounting to user defined systems. The optic has a field of view of about 1.5°. The outer dimesion of the optic allows the fitting to common used solar trackers.

Direct entrance optic like J1004 with an internal narrowand detector. The optic has a field of view of about 1.5°. The outer dimesion of the optic allows the fitting to common used solar trackers.