MidOpt BP Series Filter BP324
Uniforce Product
Salient Features
Near-UV Bandpass Filter
Useful in UV imaging applications, BP324 filters have a broad spectral bandwidth in the UV while effectively blocking most visible and infrared light. Note that there is a slight deep red/near IR leak that peaks at about 720nm. Because this filter absorbs all unwanted visible and/or infrared light, it is not recommended for placement in front of intense (white) light sources
- Passes UV portions 320-380 nm and 280-320nm
- Blocks < 280 nm
- Configurations can also be supplied for mounting in front of UV LED light sources
BP324 Near-UV Bandpass Filter
- Useful Range : 290-365nm
- FWHM : 105nm
- Tolerance : +/- 10nm
- Minimum Peak Transmission : >90%
- Surface Quality : 40/20
The performance of a filter is based on what happens to light passing through the filter. The apparent color of light reflected off the surface is not a reliable way to judge the filter’s capabilities. Batch-to-batch difference in the apparent color of the coatings or filter substrates can often be easily seen when looking at two examples of the same filter type. The color of the coating does not indicate a disparity in performance.
Applications: BP324 App Note PDF
BP324 Transmission Data (Typical)
| wavelength | transmission | wavelength | transmission |
| (nm) | (%) | (nm) | (%) |
| 1100 | 11.62 | 650 | 0.92 |
| 1090 | 11.81 | 640 | 0.32 |
| 1080 | 11.91 | 630 | 0.15 |
| 1070 | 11.88 | 620 | 0.11 |
| 1060 | 11.7 | 610 | 0.1 |
| 1050 | 11.38 | 600 | 0.07 |
| 1040 | 10.9 | 590 | 0.05 |
| 1030 | 10.29 | 580 | 0.03 |
| 1020 | 9.55 | 570 | 0.05 |
| 1010 | 8.74 | 560 | 0.09 |
| 1000 | 7.88 | 550 | 0.11 |
| 990 | 7.03 | 540 | 0.08 |
| 980 | 6.18 | 530 | 0.05 |
| 970 | 5.39 | 520 | 0.04 |
| 960 | 4.68 | 510 | 0.04 |
| 950 | 4.04 | 500 | 0.03 |
| 940 | 3.47 | 490 | 0.02 |
| 930 | 2.99 | 480 | 0.01 |
| 920 | 2.57 | 470 | 0 |
| 910 | 2.23 | 460 | 0 |
| 900 | 1.95 | 450 | 0 |
| 890 | 1.75 | 440 | 0 |
| 880 | 1.61 | 430 | 0.01 |
| 870 | 1.53 | 420 | 0 |
| 860 | 1.52 | 410 | 0 |
| 850 | 1.52 | 400 | 0.37 |
| 840 | 1.54 | 390 | 7.83 |
| 830 | 1.61 | 380 | 38.08 |
| 820 | 1.77 | 370 | 69.8 |
| 810 | 2.02 | 360 | 84.68 |
| 800 | 2.44 | 350 | 89.34 |
| 790 | 3.08 | 340 | 90.76 |
| 780 | 3.98 | 330 | 90.81 |
| 770 | 5.25 | 320 | 90.07 |
| 760 | 7.31 | 310 | 88.63 |
| 750 | 10.12 | 300 | 86.04 |
| 740 | 13.78 | 290 | 80.11 |
| 730 | 17.98 | 280 | 66.4 |
| 720 | 21.55 | 270 | 40.04 |
| 710 | 22.69 | 260 | 10.8 |
| 700 | 22.27 | 250 | 0.45 |
| 690 | 18.9 | 240 | 0.01 |
| 680 | 13.39 | 230 | 0.01 |
| 670 | 6.96 | 220 | 0 |
| 660 | 2.93 | 210 | 0 |
| 200 | 0 |
MidOpt StablEDGE™ optical filters are specifically designed to be less susceptible to effects from angular shifting seen when optical filters are placed in front of short focal length (<12 mm) camera lenses.
StablEDGE™ filters take advantage of absorptive filter glass to form the leading
edge of the filter passband.This assures no shifting in this region, even when the
lens FOV exceeds 100°.StablEDGE™ designs are less angle-of-incidence sensitive, inherently more rugged, and are environmentally stable.
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
Learn More About
› Color Separation for Monochrome Imaging
› Blocking Unwanted Light in Monochrome Imaging
› How Bandpass Filters Increase Resolution in Monochrome Imaging
› Near-IR Imaging in Monochrome Applications
› Fluorescense Imaging in Monochrome Applications
> Learn More About How to Minimize the Effects of Short Shifting
