Infrared image of Portrait of a Gentleman with a Walking Stick showing initial sketch of arched doorway in the background and column with base on the left. InGaAs camera using 1500-1680nm filter (image: Shawn Digney-Peer)
Infrared image of Portrait of a Gentleman with a Walking Stick showing initial sketch of arched doorway in the background and column with base on the left. InGaAs camera using 1500-1680nm filter (image: Shawn Digney-Peer)