Choosing a Kernel Filter
The modular design of our Kernel arrays allows you to easily configure which number of sensors and thus filters each array contains. Once you determine how many sensors you will use you need to choose which filter will be paired with each sensor. The selection of which filter to use is based on which wavelengths of light you need to capture in order to assess the particular contrast within your subject matter. Often times it is best to find past research papers to determine which wavelengths you need to capture and which index to use to process the pixel data.
Kernel uses a threaded internal glass filter to allow only certain wavelengths of light to reach the sensor.
Kernel Filter Specifications:
Outer Diameter Threads: 25.4mm x 1-32 UN 2A (C Mount) pitch
Clear Aperture: 9.0mm
Filter Mount Thickness: 3.0mm
Mount Material: Black Anodized Aluminum
Filter Glass Thickness: 1.0mm
Filter Glass Surface Quality: 40/20
Available Kernel Filters:
Filter |
Sensor |
Peak Wavelength |
Transmission Range (50%) |
Chart |
Typical Uses |
|---|---|---|---|---|---|
| F405 | MONO | 405nm | 400-415nm | VIEW | Ultraviolet (UV) light detection |
| F450 | MONO | 450nm | 429-459nm | VIEW | Blue light indices |
| F490 | MONO | 490nm | 468-506nm | VIEW | Blue light indices |
| F518 | MONO | 518nm | 507-527nm | VIEW | Green light indices |
| F550 | MONO | 550nm | 535-565nm | VIEW | Green light indices |
| F590 | MONO | 590nm | 574-606nm | VIEW | Green light indices |
| F615 | MONO | 615nm | 603-624nm | VIEW | Green light indices |
| F632 | MONO | 632nm | 625-655nm | VIEW | Red light indices |
| F650 | MONO | 650nm | 641-672nm | VIEW | Red light indices |
| F685 | MONO | 685nm | 674-698nm | VIEW | Red light indices |
| F725 | MONO | 725nm | 712-735nm | VIEW | Red-edge indices |
| F780 | MONO | 780nm | 762-796nm | VIEW | NIR light indices |
| F808 | MONO | 808nm | 801-815nm | VIEW | NIR light indices |
| F850 | MONO | 850nm | 835-865nm | VIEW | NIR light indices |
| F880 | MONO | 880nm | 867-893nm | VIEW | NIR light indices |
| F940 | MONO | 940nm | 905-965nm | VIEW | NIR light indices |
| F945 | MONO | 945nm | 941-949nm | VIEW | NIR light indices |
| F644 | RGB | X | 395-638nm | VIEW | Visible light RGB only (Cut-off 648nm) |
| F475-550-850 | RGB | 475nm & 550nm & 850nm | 468-483nm & 543-558nm & 835-865nm | VIEW | ENDVI, improved NDVI |
| F550-660-850 | RGB | 550nm & 660nm & 850nm | 543-558nm & 653-668nm & 835-865nm | VIEW | NDVI, GNDVI, CVI, NG, NNIR, NR, TVI |
| F395-870 | RGB | 395nm & 870nm | 375-425nm & 745-970nm | VIEW | Atmospheric indices |
Top Lens Protector
The clear glass lens protector on Kernel provides a sealed, abrasion resistant aperture. You can thread additional filters on top of the LP but do not suggest it due to increased vignetting that may result.
Outer Diameter: 24.0mm
Threads: 22.5mm x 0.5mm pitch
Clear Aperture: 18.5mm
Filter Mount Thickness: 7.0mm
Filter Glass Thickness: 1.0mm
Mount Material: Black Anodized Aluminum
Useful Transmission Range: 350-1100nm
Cut-on Wavelength 50% Transmission: 330nm
Tolerance: +/- 10nm
Peak Transmission: >90%
Surface Quality: 40/20
