MidOpt’s BP850 near-IR bandpass optical filter aids in surgical navigation application. During typical sinus and skull base procedures, surgery is performed under low light conditions. Hence it was important to create a system that is unobtrusive to the surgeon. To illuminate the scene, the NaviENT (system developed by ClaroNav) uses an array of 2×96 Near-IR LEDs of 5mm diameter, emitting at 850nm with a 60° field of view. These are mounted inside a tracking box with the Point Grey Bumblebee XB3 camera. Near-IR light projected onto the scene is then captured by the cameras and filtered with MidOpt’s 850nm near-IR band-pass filters (BP850) prior to processing. Since the BP850 ensures out of band blocking, the optical filter removes unwanted ambient light from the scene.