For qualified customers that furnish their own optics for use with Photon cores, FLIR sells a Windows(TM) application program called Alt Lens Cal. This software enables users to perform a supplementary calibration of the camera with a lens. This field-calibration process requires the use of at least one blackbody source (a uniform, controllable temperature reference) that has an area greater than the diameter of the front of the lens.
FLIR also offers a low-cost, 4" blackbody as an accessory at this store, part number 285-0029-02.
The Alt Lens Cal software also requires a customer-furnished PC, which should be dedicated to this task. The calibration routine calculates gain terms on a per-pixel basis with the customer-supplied lens attached to the Photon core, and stores the customer-performed calibration in non-volatile camera memory. The original factory calibration coefficients are first uploaded from the camera and stored into a file on the PC, then the new calibration data is downloaded and stored directly into the camera. Multiple calibration files can be stored on the host computer. The original factory calibration file can be restored if necessary, and the customer can actually build a library of lens calibration files for a Photon camera.
