Science Operations

Optical Path

The light from the primary hits the adaptive secondaries (AdSecs). From there the tertiaries send the f/15 beams wards the LBTI Bent Gregorian Focal Station. The visible light (λ < 1μm) is redirected from by the dichroic entrance window toward the pyramid sensor wavefront sensor (WFS) units. The infrared light is allowed to pass to the LBTI Universal Beam Combiner (UBC). The UBC is cryogenically cooled to maintain good performance in the infrared. The UBC is designed to reimage the two f/15 focal planes to a common focal plane with an f/15 envelope with optimized the image overlap, phase difference and image quality over a large field-of-view.

The UBC is cryogenically cooled to maintain good performance in the infrared. The UBC is designed to reimage the two f/15 focal planes to a common focal plane with an f/15 envelope with optimized the image overlap, phase difference and image quality over a large field-of-view. The light from teh beam combiner comes to focus ~ 125mm inside the entrance window for the Nulling and Imaging Camera (NIC).

The NIC houses the L and M band Infrared Camera (LMIRcam), and the Nulling Optimized Mid Infrared Camera (NOMIC). Light is split after the focal plane by a Trichoric that send 3-5μm light to LMIRcam while reflecting 2-2.4μm light to the phase camera (PhaseCam) and 8-13μm to NOMIC. A window can be used in place of the trichoric inorder to observe bluer wavelengths with LMIRcam to take advantage of the full sensitivity range of the detector.