Optical transducer panels were almost see-through sensors designed to be added onto a starship as an upgrade. In the year 16 ABY, the Wookiee named Jowdrrl used specifically crafted optical transducer panels to cover the viewports on the loading hatches and quad laser cannon turrets of the Millennium Falcon. By sending the information they gathered to flatscreen displays located in the cockpit, these sensors effectively got rid of the majority of the ship's areas where the pilot couldn't see.