Since just 1996: Infrared Camera:
The camera weighs only 9.9 pounds and measures 4.4 inches wide, 10.3 inches deep and 7.2 inches long. The prototype plugs into a wall socket for power but the camera can readily be converted to battery power for portability.
That eyeball ain’t gonna fit on a cubesat.
(Note the image suggests that the camera produces 256 x 256 pixel images…0.065MP.)