MidOpt Filter TB475/550/850
Uniforce Product
Salient Features
New Triple Bandpass Blue+Green+850nm NIR
TB475/550/850 Triple Bandpass Blue+Green+850nm NIR
- Useful Range : 468-483nm, 543-558nm, 835-865nm
- FWHM : 20nm, 20nm, 40nm
- Tolerance : +/-10nm
- Minimum Peak Transmission : ≥85%
- Surface Quality : 40/20
New TB475/550/850 Triple Bandpass Blue+Green+850nm NIR Filter, when mounted in converted consumer cameras used in aerial surveying applications, can help provide a more affordable, lightweight alternative vs. systems employing three or more cameras or sensors. Blue-Green-Near IR Extended Normalized Difference Vegetation Index (ENDVI) data gathered for vegetative health monitoring can be used to provide similar, but spectrally different information as compared to traditional NDVI data. Soil background, differing atmospheric conditions and various types of vegetation can all influence the reflection of visible light somewhat differently. ENDVI analysis may, at times, be able to impart more accurate or reliable information regarding plant or crop health by additional leveraging of information in the blue portion of the spectrum. The formula used is:
ENDVI = [(NIR + Green) – (2 * Blue)] / [(NIR + Green) + (2 * Blue)]
TB475/550/850 Transmission Data
| wavelength | transmission | wavelength | transmission |
| (nm) | (%) | (nm) | (%) |
| 1100 | 2.03 | 720 | 0.23 |
| 1090 | 1.06 | 710 | 0.05 |
| 1080 | 0.74 | 700 | 0.12 |
| 1070 | 0.69 | 690 | 0.68 |
| 1060 | 0.82 | 680 | 0.31 |
| 1050 | 1.09 | 670 | 0.79 |
| 1040 | 0.98 | 660 | 067 |
| 1030 | 0.58 | 650 | 0.52 |
| 1020 | 0.38 | 640 | 0.78 |
| 1010 | 0.35 | 630 | 0.15 |
| 1000 | 0.45 | 620 | 0.68 |
| 990 | 0.84 | 610 | 0.08 |
| 980 | 1.49 | 600 | 0.13 |
| 970 | 1.14 | 590 | 0.28 |
| 960 | 0.91 | 580 | 0.57 |
| 950 | 1.19 | 570 | 1.52 |
| 940 | 1.36 | 560 | 94.19 |
| 930 | 0.64 | 550 | 95.83 |
| 920 | 0.36 | 540 | 29.45 |
| 910 | 0.32 | 530 | 0.16 |
| 900 | 0.49 | 520 | 0.21 |
| 890 | 1.30 | 510 | 0.09 |
| 880 | 7.38 | 500 | 0.12 |
| 870 | 69.08 | 490 | 0.27 |
| 860 | 95.78 | 480 | 93.23 |
| 850 | 95.80 | 470 | 95.28 |
| 840 | 95.74 | 460 | 1.63 |
| 830 | 60.38 | 450 | 0.14 |
| 820 | 4.34 | 440 | 0 |
| 810 | 0.73 | 430 | 0 |
| 800 | 0.34 | 420 | 0 |
| 790 | 0.48 | 410 | 0 |
| 780 | 1.94 | 400 | 0 |
| 770 | 0.31 | 390 | 0 |
| 760 | 0.27 | 380 | 0 |
| 750 | 1.41 | 370 | 0 |
| 740 | 0.18 | 360 | 0 |
| 730 | 0.39 | 350 | 0 |
Available Mounts
Threaded Mount
- Designed for lenses with filter threads, a variety of filter types and stock threaded sizes are available: M13.25-M105
- Larger sizes, 62mm to 105mm, are made to order and are not returnable
- Custom thread sizes are available upon request.
- Threaded mounts are available as black anodized aluminum rings. Rotating mounts with locking thumb screws are generally provided.
Ordering Example:
- Filter: BP470
- Mount Size: M27
Correct Part# is:
- BP470-27
Threaded Mount Technical Drawing PDF
Slip Mount
- Designed for varifocal lenses, wide angle lenses and lenses without filter threads
- Accommodates standard threaded mounts
- Low profile and oversize diameter design prevents wide angle lens vignetting
- Locking set screws and a wrench are provided to secure the adapter to the lens
- Many varifocal and shorter fixed focal length (wide angle) lenses are not supplied with filter threads due to the presence of a protruding, strongly convex lens element. Our slip mount adapters allow standard threaded filters to be fitted securely to these and a large variety of lenses that do not have filter threads provided.
Ordering Example:
- Filter: BP470
- Outside Diameter of Lens in mm: 43mm
Correct Part# is:
- BP470-S43
Slip Mount Technical Drawing PDF
C/CS Camera Mount
- Designed to thread directly into any C/CS mount camera between the lens and sensor
- Wrenching slots aid in threading the filter into the camera body. A wrench is supplied with each filter.
- Helpful in applications with space constraints
- Can be used with wide angle lenses that do not accept filters at the front end to prevent vignetting
- C/CS mount filters are available in a standard 1mm thickness
Ordering Example:
- Filter: BP470
- Mount Size: 25.4
Correct Part# is:
- BP470-25.4
C/CS Camera Mount Technical Drawing PDF
Unmounted & Custom Size
- Any MidOpt filter type can be provided as an Unmounted filter
- Custom shapes and sizes are typically fabricated with one day to two week lead times
- Custom filter types with longer lead times can also be quoted. Please contact us regarding feasibility.
Learn More About
› Learn More About Day/Night Imaging in Color Applications
› Learn More About the Use of Dual Bandpass Filters in NDVI/Agricultural Inspection
