National Aeronautics and Space Administration

TESS Science Instrument

FOUR WIDE FIELD-OF-VIEW CCD CAMERAS

The TESS payload consists of four identical cameras and a Data Handling Unit (DHU). Each camera consists of a lens assembly with seven optical elements, and a detector assembly with four CCDs and their associated electronics. All four cameras are mounted onto a single plate.

Each of the four cameras has:

• 24° × 24° Field-of-View
• 100 mm effective pupil diameter
• Lens assembly with 7 optical elements
• Athermal design
• 600nm - 1000nm bandpass
• 16.8 Megapixel, low-noise, low-power, MIT Lincoln Lab CCID-80 detector

Figure Above: Diagram of the TESS lens assembly, CCD focal plane, and detector electronics.

Figure Above: Left.| Two lens prototypes that were constructed. Right.| The detector assembly of one of the prototype lenses. The frame-store regions of the CCDs are covered.