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Custom three-element distal imaging lens. The zoomed out view (bottom) shows the 6.38-mm FFOV at a nominal working distance (WD) of 5 mm. The total lens length is 0.88 mm and the lens OD is 0.3 mm. A magnified view of the lenses focusing onto the CFB is also shown (top). The image circle of the CFB (blue) has a diameter of 0.19 mm.
