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MidOpt Bi Series Filter Bi520

Uniforce Product

Salient Features

New  Light Green Interference Bandpass

 

Bi20 Light Green Interference Bandpass

  • Useful Range : 515-525nm
  • FWHM : 25nm
  • Tolerance : +/- 5nm
  • Minimum Peak Transmission : ≥88%
  • Surface Quality : 40/20

Bi520 Green Interference Bandpass filters typically are used in applications employing 520nm green laser diodes or green 520nm/525nm LED light sources. The latter typically find use in machine vision inspection while the former are commonly used in bioanalytical applications. Various popularly used fluorophores (e.g., GFP, GelStar, SYBER Green, etc.) have emission maximas at or very near 520nm, and Bi520 filters can be used to effectively block excitation sources and interfering longer and shorter wavelength light while letting this light pass through to the camera’s sensor.

Transmission DataAvailable MountsLearn MoreQuote Request

Bi520 Transmission Data

wavelength transmission wavelength transmission
(nm) (%) (nm) (%)
1100 76.45 720 0.05
1090 81.53 710 0.08
1080 86.62 700 0.04
1070 82.95 690 0.02
1060 73.80 680 0.05
1050 69.36 670 0.11
1040 73.46 660 0.04
1030 82.50 650 0.03
1020 87.31 640 0.04
1010 88.27 630 0.02
1000 85.89 620 0.02
990 67.49 610 0.03
980 44.73 600 0.06
970 36.78 590 0.04
960 47.12 580 0.04
950 69.73 570 0.03
940 54.67 560 0.01
930 38.81 550 0.02
920 48.55 540 1.68
910 24.24 530 65.52
900 4.10 520 90.52
890 0.94 510 43.34
880 0.48 500 0.46
870 0.12 490 0.07
860 0.10 480 0.08
850 0.15 470 0.01
840 0.25 460 0.01
830 0.11 450 0.01
820 0.04 440 0.01
810 0.03 430 0.00
800 0.04 420 0.00
790 0.03 410 0.00
780 0.02 400 0.00
770 0.03 390 0.03
760 0.09 380 0.09
750 0.10 370 0.04
740 0.08 360 0.00
730 0.08 350 0.01

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

midopt-c-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

midopt-unmounted

  • 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.

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