DB475_850-22.5 | DB475/850 Dual Bandpass Blue + 850nm NIR

Midwest Optical SystemsSKU: MID DB475_850-22.5
Lead Time: 15 Business Days

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Sale price$207.00 USD

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Lead Times are estimated based on standard product lead times, but are subject to change. For the latest product lead times, we always recommend contacting us.

Description

The MidOpt DB475_850-22.5 dual bandpass filter has been primarily designed for NDVI imaging applications. When using a single camera, this filter allows reflected near-infrared light (850nm) to be captured in the red channel and reflected blue light (475nm) to be captured in the blue channel (the green channel is not used).

Even with an inexpensive consumer camera (that 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 = (red – blue) / (red + blue). Healthy vegetation will absorb (not reflect) blue light and strongly reflect near-infrared light. Thus, this information can be used to apply a false-color gradient to images to better highlight 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.

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