WHAT DOES COOLED LONG-WAVE INFRARED LENSES MEAN?

The lens will need to build an image that may fill the focal plane array, or detector, of your IR camera. These arrays are rectangular or square in form, but a lens creates a round picture about the focal plane. This calls for that the lens make an image which has a diameter equal to, or much larger than, the diagonal on the array.✅ You want buil