The Veiling Glare Mask pairs with the Imatest Contrast Resolution Target and Frame to block additional light from entering the camera. The additional light is included in the non-measurement areas of the standard Contrast Resolution target which is intended to allow the camera under test to get a good automatic exposure on a scene that somewhat resembles a real world scene where flare light is present inside the lens.
After applying the Veiling Glare mask, only 60% of each measurement patch and the registration marks remain visible. This darkened scene can be used to emulate a nighttime environment where the maximum dynamic range will be more attainable. This target will be more difficult to expose, locking the exposure and seeing how well the steps can be recognized with and without the mask can be used to determine how much flare light is reducing your camera system’s dynamic range.
The Veiling Glare Mask for Contrast Resolution Target can be purchased individually or with the Frame.