DB475/850 Dual Bandpass Blue + 850nm NIR

Midwest Optical SystemsSKU: DB475/850-13.25

Filter Mounting Thread: 13.25mm
Sale price$130.00 USD

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MidOpt DB475/850 Dual Bandpass Blue + 850nm NIR

The DB475/850 Dual Bandpass Filter has been primarily designed for NDVI imaging applications. When using a single camera, incorporation of this filter allows reflected near-infrared light (850nm) to be captured in the camera sensor’s red channel and reflected blue light (475nm) to be captured in the sensor’s blue channel (the green channel is not used). Even when using an inexpensive consumer camera (that has first had its IR blocking filter removed), this easy separation then 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 then be used to apply a false color gradient to images to better highlight the contrast between regions of healthy vegetation vs. areas with stressed/diseased or no vegetation.

MidOpt DB475/850 Dual Bandpass Blue + 850nm NIR Technical Characteristics

Useful Range: 460-490nm, 830-870nm
FWHM: 45nm, 55nm
Tolerance: +/-5nm
Peak Transmission ?90%
Surface Quality 40/20
Mount (Mount Varies)
Clear Aperture (Aperture Varies)
Overall Thickness (Overall Thickness Varies)
Exposed Thickness (Exposed Thickness Varies)
StablEdge No

*Filters 62mm and greater have a surface quality tolerance of 60/40.

MidOpt DB475/850 Dual Bandpass Blue + 850nm NIR Transmission Chart

MidOpt DB475/850 Interference Bandpass Filter Transmission

MidOpt DB475/850 Dual Bandpass Blue + 850nm NIR Transmission Data 

MidOpt DB475/850 Interference Bandpass Filter Datasheet

MidOpt DB475/850 Part Numbers:

MidOpt DB475/850-25.4
MidOpt DB475/850-13.25
MidOpt DB475/850-22.5
MidOpt DB475/850-27
MidOpt DB475/850-30.5
MidOpt DB475/850-34
MidOpt DB475/850-35.5
MidOpt DB475/850-37
MidOpt DB475/850-37.5
MidOpt DB475/850-39
MidOpt DB475/850-40.5
MidOpt DB475/850-43
MidOpt DB475/850-46
MidOpt DB475/850-48
MidOpt DB475/850-49
MidOpt DB475/850-52
MidOpt DB475/850-55
MidOpt DB475/850-58
MidOpt DB475/850-62
MidOpt DB475/850-67
MidOpt DB475/850-72
MidOpt DB475/850-77
MidOpt DB475/850-82
MidOpt DB475/850-86
MidOpt DB475/850-95
MidOpt DB475/850-105 

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