In the Optical Assembly the incident radiance and irradiance are collected and split according to wavelength and focussed on the detector modules of the two optical channels. The Optical Bench consists of a single aluminium structure in which all elements are mounted. Attached to this aluminium structure are the two Detector Modules. The Optical Assembly Thermal Hardware consists of a thermal radiator and heaters. The thermal radiator is thermally connected to the detector modules via cold-fingers and flex-links. The heaters are attached to the Optical Bench structure and the CCD detectors.
Optical Bench (OPB)
The OPB consists of a telescope, an UV channel (264-380 nm), a visible channel (349-504 nm)
and calibration systems. The UV channel is split in the UV-1 channel (264-311 nm)
and the UV-2 channel (307-383 nm). For switching between Earth
observations and the various calibration modes the Optical
Bench is equipped with three mechanisms. The figure below shows the
optical layout of the telescope, the UV-1 channel, the UV-2 channel
and the calibration optics are shown.
Click on the figure for a larger view.