The MidOpt DB660_850-62 has been designed primarily for NDVI imaging applications. When using a single camera, incorporating this filter allows reflected red light (660nm) to be captured in the camera’s red channel and reflected near-infrared light (850nm) to be captured in the blue channel (the green channel is not used). Even with an inexpensive consumer camera (which has had its IR-blocking filter removed), this easy separation makes it possible to post-process the red and blue channels for NDVI by performing the calculation: NDVI = (blue – red) / (blue + red). Healthy vegetation will absorb (not reflect) red light and strongly reflect near-infrared light. Thus, this information can be used to apply a false-color gradient to images, better highlighting the contrast between healthy vegetation and areas with stressed/diseased or no vegetation. All MidOpt filters can also be purchased unmounted or in custom dimensions upon request from Machine Vision Direct. Technical Specifications Specifications + Useful Range Min 645 nm Useful Range Max 675 nm Secondary Useful Range Min 830 nm Secondary Useful Range Max 870 nm FWHM 4050 nm Adhesive Backed Yes Tolerance 5 % Peak Transmission ≤ 90 % Surface Quality (Scratch-Dig) 40-20 Substrate Material Clear Glass Filter Diameter M62 x P0.75 Product Availability + Standard Lead Time 15 Days Stock Location Built to Order Product Lifecycle Active
