MidOpt - Narrow Bandwidth Interference Filters

The Bi Series is designed for use with laser diodes. Bi Series are popular for life science and laser analysis applications where only discrete wavelengths need to be passed to maximize system performance.

Key Features

  • 20-35nm FWHM; Narrow bandwidth
  • High transmission ≥85%
  • Designed for use with laser diodes
  • Ideal wavelength separation when multiple light sources of similar wavelengths are present
  • Reflective, mirror-type surface that helps minimize thermal effects Available in sizes up to 79.5mm sq.

Find the right model for your needs

Use the filters below to narrow down your selection based on your application requirements

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Nom de produit Bandwidth (FWHM) Cut-off wavelength Cut-on wavelength Dimension (height, mm) Dimension (width, mm) Filter thread Filter type Manufacturer Useful Range (nm)
35 820 nm 798 nm N/A N/A M37.5 x 0.5 bandpass Midwest Optical 798 - 820
33 558 nm 535 nm N/A N/A M35.5 x 0.5 bandpass Midwest Optical 535 - 558
35 820 nm 798 nm N/A N/A M27 x 0.5 bandpass Midwest Optical 798 - 820
28 665 nm 650 nm N/A N/A M62 x 0.75 bandpass Midwest Optical 650 - 665
28 640 nm 625 nm N/A N/A C-Mount bandpass Midwest Optical 625 - 640
28 665 nm 650 nm N/A N/A M27 x 0.5 bandpass Midwest Optical 650 - 665
30 415 nm 400 nm N/A N/A C-Mount bandpass Midwest Optical 400 - 415
28 665 nm 650 nm N/A N/A M43 x 0.75 bandpass Midwest Optical 650 - 665
33 860 nm 845 nm N/A N/A M40.5 x 0.5 bandpass Midwest Optical 845 - 860
30 415 nm 400 nm N/A N/A M52 x 0.75 bandpass Midwest Optical 400 - 415
30 415 nm 400 nm N/A N/A M35.5 x 0.5 bandpass Midwest Optical 400 - 415
33 558 nm 535 nm N/A N/A C-Mount bandpass Midwest Optical 535 - 558
33 558 nm 535 nm N/A N/A M49 x 0.75 bandpass Midwest Optical 535 - 558
28 665 nm 650 nm N/A N/A C-Mount bandpass Midwest Optical 650 - 665
28 665 nm 650 nm N/A N/A M49 x 0.75 bandpass Midwest Optical 650 - 665
35 820 nm 798 nm N/A N/A M49 x 0.75 bandpass Midwest Optical 798 - 820
35 820 nm 798 nm N/A N/A C-Mount bandpass Midwest Optical 798 - 820
33 860 nm 845 nm N/A N/A M30.5 x 0.5 bandpass Midwest Optical 845 - 860
30 415 nm 400 nm N/A N/A M55 x 0.75 bandpass Midwest Optical 400 - 415
25 525 nm 515 nm N/A N/A M62 x 0.75 bandpass Midwest Optical 515 - 525
30 415 nm 400 nm N/A N/A M25.5 x 0.5 bandpass Midwest Optical 400 - 415
28 640 nm 625 nm N/A N/A M30.5 x 0.5 bandpass Midwest Optical 625 - 640
30 415 nm 400 nm N/A N/A M30.5 x 0.5 bandpass Midwest Optical 400 - 415
35 820 nm 798 nm N/A N/A M72 x 0.75 bandpass Midwest Optical 798 - 820
33 860 nm 845 nm N/A N/A M72 x 0.75 bandpass Midwest Optical 845 - 860
28 640 nm 625 nm N/A N/A M72 x 0.75 bandpass Midwest Optical 625 - 640
33 860 nm 845 nm N/A N/A C-Mount bandpass Midwest Optical 845 - 860
30 415 nm 400 nm N/A N/A M37.5 x 0.5 bandpass Midwest Optical 400 - 415
30 415 nm 400 nm N/A N/A No Filter Thread bandpass Midwest Optical 400 - 415
40 846 nm 822 nm N/A N/A C-Mount bandpass Midwest Optical 822 - 846
30 415 nm 400 nm N/A N/A M27 x 0.5 bandpass Midwest Optical 400 - 415
35 465 nm 445 nm N/A N/A C-Mount bandpass Midwest Optical 445 - 465
28 640 nm 625 nm N/A N/A M67 x 0.75 bandpass Midwest Optical 625 - 640
30 415 nm 400 nm N/A N/A M40.5 x 0.5 bandpass Midwest Optical 400 - 415
28 640 nm 625 nm N/A N/A M49 x 0.75 bandpass Midwest Optical 625 - 640
33 860 nm 845 nm N/A N/A M27 x 0.5 bandpass Midwest Optical 845 - 860
25 525 nm 515 nm N/A N/A C-Mount bandpass Midwest Optical 515 - 525
28 665 nm 650 nm N/A N/A M34 x 0.5 bandpass Midwest Optical 650 - 665
28 665 nm 650 nm N/A N/A No Filter Thread bandpass Midwest Optical 650 - 665
25 525 nm 515 nm N/A N/A M35.5 x 0.5 bandpass Midwest Optical 515 - 525
35 465 nm 445 nm N/A N/A M35.5 x 0.5 bandpass Midwest Optical 445 - 465
35 465 nm 445 nm N/A N/A M58 x 0.75 bandpass Midwest Optical 445 - 465
28 665 nm 650 nm N/A N/A M30.5 x 0.5 bandpass Midwest Optical 650 - 665
35 465 nm 445 nm N/A N/A M37 x 0.75 bandpass Midwest Optical 445 - 465
25 525 nm 515 nm N/A N/A M37 x 0.75 bandpass Midwest Optical 515 - 525
30 665 nm 643 nm N/A N/A C-Mount bandpass Midwest Optical 643 - 665
35 465 nm 445 nm N/A N/A M72 x 0.75 bandpass Midwest Optical 445 - 465
25 525 nm 515 nm N/A N/A M40.5 x 0.5 bandpass Midwest Optical 515 - 525
28 640 nm 625 nm N/A N/A No Filter Thread bandpass Midwest Optical 625 - 640
35 465 nm 445 nm N/A N/A M27 x 0.5 bandpass Midwest Optical 445 - 465
25 525 nm 515 nm N/A N/A M30.5 x 0.5 bandpass Midwest Optical 515 - 525
35 465 nm 445 nm N/A N/A M22.5 x 0.5 bandpass Midwest Optical 445 - 465
35 465 nm 445 nm N/A N/A M25.5 x 0.5 bandpass Midwest Optical 445 - 465
28 640 nm 625 nm N/A N/A M35.5 x 0.5 bandpass Midwest Optical 625 - 640
35 1310 nm 1290 nm N/A N/A M30.5 x 0.5 bandpass Midwest Optical 1290 - 1310
35 820 nm 798 nm N/A N/A M52 x 0.75 bandpass Midwest Optical 798 - 820
25 732 nm 717 nm N/A N/A C-Mount bandpass Midwest Optical 717 - 732
25 732 nm 717 nm N/A N/A M25.5 x 0.5 bandpass Midwest Optical 717 - 732
35 820 nm 798 nm N/A N/A M25.5 x 0.5 bandpass Midwest Optical 798 - 820
28 665 nm 650 nm N/A N/A M25.5 x 0.5 bandpass Midwest Optical 650 - 665
30 665 nm 643 nm N/A N/A M25.5 x 0.5 bandpass Midwest Optical 643 - 665
33 558 nm 535 nm N/A N/A M25.5 x 0.5 bandpass Midwest Optical 535 - 558
25 525 nm 515 nm N/A N/A M49 x 0.75 bandpass Midwest Optical 515 - 525
30 665 nm 643 nm N/A N/A M27 x 0.5 bandpass Midwest Optical 643 - 665
28 640 nm 625 nm N/A N/A M27 x 0.5 bandpass Midwest Optical 625 - 640
35 820 nm 798 nm N/A N/A M55 x 0.75 bandpass Midwest Optical 798 - 820
25 525 nm 515 nm N/A N/A M72 x 0.75 bandpass Midwest Optical 515 - 525
25 525 nm 515 nm N/A N/A M27 x 0.5 bandpass Midwest Optical 515 - 525
28 665 nm 650 nm N/A N/A No Filter Thread bandpass Midwest Optical 650 - 665
28 665 nm 650 nm N/A N/A No Filter Thread bandpass Midwest Optical 650 - 665
33 860 nm 845 nm N/A N/A M62 x 0.75 bandpass Midwest Optical 845 - 860
28 665 nm 650 nm N/A N/A M40.5 x 0.5 bandpass Midwest Optical 650 - 665
28 640 nm 625 nm N/A N/A M40.5 x 0.5 bandpass Midwest Optical 625 - 640
25 732 nm 717 nm N/A N/A No Filter Thread bandpass Midwest Optical 717 - 732
25 732 nm 717 nm N/A N/A M72 x 0.75 bandpass Midwest Optical 717 - 732
35 465 nm 445 nm N/A N/A M30.5 x 0.5 bandpass Midwest Optical 445 - 465
28 640 nm 625 nm N/A N/A M46 x 0.75 bandpass Midwest Optical 625 - 640
28 665 nm 650 nm N/A N/A No Filter Thread bandpass Midwest Optical 650 - 665
25 525 nm 515 nm N/A N/A M25.5 x 0.5 bandpass Midwest Optical 515 - 525
25 732 nm 717 nm N/A N/A M67 x 0.75 bandpass Midwest Optical 717 - 732
28 640 nm 625 nm N/A N/A M62 x 0.75 bandpass Midwest Optical 625 - 640
30 415 nm 400 nm N/A N/A No Filter Thread bandpass Midwest Optical 400 - 415
30 415 nm 400 nm N/A N/A M46 x 0.75 bandpass Midwest Optical 400 - 415
35 465 nm 445 nm N/A N/A M46 x 0.75 bandpass Midwest Optical 445 - 465
28 665 nm 650 nm N/A N/A No Filter Thread bandpass Midwest Optical 650 - 665
35 465 nm 445 nm N/A N/A No Filter Thread bandpass Midwest Optical 445 - 465
25 525 nm 515 nm N/A N/A No Filter Thread bandpass Midwest Optical 515 - 525
28 640 nm 625 nm N/A N/A M25.5 x 0.5 bandpass Midwest Optical 625 - 640
30 415 nm 400 nm N/A N/A No Filter Thread bandpass Midwest Optical 400 - 415
30 415 nm 400 nm N/A N/A No Filter Thread bandpass Midwest Optical 400 - 415
33 558 nm 535 nm N/A N/A No Filter Thread bandpass Midwest Optical 535 - 558
30 415 nm 400 nm N/A N/A M49 x 0.75 bandpass Midwest Optical 400 - 415
35 465 nm 445 nm N/A N/A No Filter Thread bandpass Midwest Optical 445 - 465
25 732 nm 717 nm N/A N/A M40.5 x 0.5 bandpass Midwest Optical 717 - 732
28 665 nm 650 nm N/A N/A M35.5 x 0.5 bandpass Midwest Optical 650 - 665
28 665 nm 650 nm N/A N/A No Filter Thread bandpass Midwest Optical 650 - 665
28 665 nm 650 nm N/A N/A No Filter Thread bandpass Midwest Optical 650 - 665
35 1460 nm 1440 nm N/A N/A M49 x 0.75 bandpass Midwest Optical 1440 - 1460
33 860 nm 845 nm N/A N/A No Filter Thread bandpass Midwest Optical 845 - 860
35 1460 nm 1440 nm N/A N/A M30.5 x 0.5 bandpass Midwest Optical 1440 - 1460
35 1310 nm 1290 nm N/A N/A M35.5 x 0.5 bandpass Midwest Optical 1290 - 1310
28 665 nm 650 nm N/A N/A M37 x 0.75 bandpass Midwest Optical 650 - 665
33 558 nm 535 nm N/A N/A M27 x 0.5 bandpass Midwest Optical 535 - 558
35 465 nm 445 nm N/A N/A M37.5 x 0.5 bandpass Midwest Optical 445 - 465
30 665 nm 643 nm N/A N/A M35.5 x 0.5 bandpass Midwest Optical 643 - 665
25 692 nm 675 nm N/A N/A M35.5 x 0.5 bandpass Midwest Optical 675 - 692
25 692 nm 675 nm N/A N/A C-Mount bandpass Midwest Optical 675 - 692
30 415 nm 400 nm N/A N/A M34 x 0.5 bandpass Midwest Optical 400 - 415
30 915 nm 895 nm N/A N/A M27 x 0.5 bandpass Midwest Optical 895 - 915
25 732 nm 717 nm N/A N/A M27 x 0.5 bandpass Midwest Optical 717 - 732
35 465 nm 445 nm N/A N/A M40.5 x 0.5 bandpass Midwest Optical 445 - 465
28 538 nm 518 nm N/A N/A M40.5 x 0.5 bandpass Midwest Optical 518 - 538
35 1560 nm 1540 nm N/A N/A M35.5 x 0.5 bandpass Midwest Optical 1540 - 1560
25 390 nm 370 nm N/A N/A M35.5 x 0.5 bandpass Midwest Optical 370 - 390
23 620 nm 605 nm N/A N/A M30 x 0.75 bandpass Midwest Optical 605 - 620
35 465 nm 445 nm N/A N/A No Filter Thread bandpass Midwest Optical 445 - 465
30 415 nm 400 nm N/A N/A M62 x 0.75 bandpass Midwest Optical 400 - 415
33 558 nm 535 nm N/A N/A M62 x 0.75 bandpass Midwest Optical 535 - 558
35 465 nm 445 nm N/A N/A M62 x 0.75 bandpass Midwest Optical 445 - 465
33 860 nm 845 nm N/A N/A M37.5 x 0.5 bandpass Midwest Optical 845 - 860
30 415 nm 400 nm N/A N/A M43 x 0.75 bandpass Midwest Optical 400 - 415
33 860 nm 845 nm N/A N/A M25.5 x 0.5 bandpass Midwest Optical 845 - 860
23 620 nm 605 nm N/A N/A C-Mount bandpass Midwest Optical 605 - 620
32 952 nm 930 nm N/A N/A M30.5 x 0.5 bandpass Midwest Optical 930 - 952
35 1460 nm 1440 nm N/A N/A M35.5 x 0.5 bandpass Midwest Optical 1440 - 1460
30 415 nm 400 nm N/A N/A M77 x 0.75 bandpass Midwest Optical 400 - 415
33 558 nm 535 nm N/A N/A M77 x 0.75 bandpass Midwest Optical 535 - 558
30 665 nm 643 nm N/A N/A M77 x 0.75 bandpass Midwest Optical 643 - 665
28 640 nm 625 nm N/A N/A M77 x 0.75 bandpass Midwest Optical 625 - 640
28 665 nm 650 nm N/A N/A M77 x 0.75 bandpass Midwest Optical 650 - 665
35 820 nm 798 nm N/A N/A M77 x 0.75 bandpass Midwest Optical 798 - 820
33 860 nm 845 nm N/A N/A M77 x 0.75 bandpass Midwest Optical 845 - 860
35 1310 nm 1290 nm N/A N/A M40.5 x 0.5 bandpass Midwest Optical 1290 - 1310
35 1460 nm 1440 nm N/A N/A M40.5 x 0.7 bandpass Midwest Optical 1440 - 1460
35 1560 nm 1540 nm N/A N/A M40.5 x 0.5 bandpass Midwest Optical 1540 - 1560
25 732 nm 717 nm N/A N/A M34 x 0.5 bandpass Midwest Optical 717 - 732
25 390 nm 370 nm N/A N/A M25.5 x 0.5 bandpass Midwest Optical 370 - 390
23 620 nm 605 nm N/A N/A M40.5 x 0.7 bandpass Midwest Optical 605 - 620
33 558 nm 535 nm N/A N/A No Filter Thread bandpass Midwest Optical 535 - 558
25 692 nm 675 nm N/A N/A No Filter Thread bandpass Midwest Optical 675 - 692
33 558 nm 535 nm N/A N/A M30.5 x 0.5 bandpass Midwest Optical 535 - 558
25 732 nm 717 nm N/A N/A M46 x 0.75 bandpass Midwest Optical 717 - 732
35 1310 nm 1290 nm N/A N/A M58 x 0.75 bandpass Midwest Optical 1290 - 1310
50 850 nm 810 nm N/A N/A M35.5 x 0.75 bandpass Midwest Optical 810 - 850
40 846 nm 822 nm N/A N/A M35.5 x 0.5 bandpass Midwest Optical 822 - 846
28 538 nm 518 nm N/A N/A C-Mount bandpass Midwest Optical 518 - 538
35 1460 nm 1440 nm N/A N/A M52 x 0.75 bandpass Midwest Optical 1440 - 1460
25 732 nm 717 nm N/A N/A M77 x 0.75 bandpass Midwest Optical 717 - 732
35 790 nm 765 nm N/A N/A C-Mount bandpass Midwest Optical 765 - 795
28 640 nm 625 nm N/A N/A M58 x 0.75 bandpass Midwest Optical 625 - 640
33 860 nm 845 nm N/A N/A M43 x 0.75 bandpass Midwest Optical 845 - 860
30 665 nm 643 nm N/A N/A M37.5 x 0.75 bandpass Midwest Optical 643 - 665
35 1460 nm 1440 nm N/A N/A M55 bandpass Midwest Optical 1440 - 1460
25 390 nm 370 nm N/A N/A M34 x 0.5 bandpass Midwest Optical 370 - 390
35 1460 nm 1440 nm N/A N/A C-Mount bandpass Midwest Optical 1440 - 1460
23 620 nm 605 nm N/A N/A M25.5 x 0.5 bandpass Midwest Optical 605 - 620
35 1560 nm 1540 nm N/A N/A M25.4 bandpass Midwest Optical 1540 - 1560
35 1310 nm 1290 nm N/A N/A M25.4 bandpass Midwest Optical 1290 - 1310
35 1460 nm 1440 nm N/A N/A M27 x 0.5 bandpass Midwest Optical 1440 - 1460
25 732 nm 717 nm N/A N/A M58 x 0.75 bandpass Midwest Optical 717 - 732
30 765 nm 740 nm N/A N/A C-Mount bandpass Midwest Optical 740 - 765
20 358 nm 344 nm N/A N/A M30.5 x 0.5 bandpass Midwest Optical 344 - 358
35 1310 nm 1290 nm N/A N/A M27 x 0.5 bandpass Midwest Optical 1290 - 1310
35 1560 nm 1540 nm N/A N/A M27 x 0.5 bandpass Midwest Optical 1540 - 1560
25 525 nm 515 nm N/A N/A M52 x 0.75 bandpass Midwest Optical 515 - 525
50 850 nm 810 nm N/A N/A M25.5 x 0.5 bandpass Midwest Optical 810 - 850
30 915 nm 895 nm N/A N/A C-Mount bandpass Midwest Optical 895 - 915
28 538 nm 518 nm N/A N/A M72 x 0.75 bandpass Midwest Optical 518 - 538
33 860 nm 845 nm N/A N/A No Filter Thread bandpass Midwest Optical 845 - 860
30 665 nm 643 nm N/A N/A No Filter Thread bandpass Midwest Optical 643 - 665
28 538 nm 518 nm N/A N/A M58 x 0.75 bandpass Midwest Optical 518 - 538
28 538 nm 518 nm N/A N/A M25.5 x 0.5 bandpass Midwest Optical 518 - 538
28 538 nm 518 nm N/A N/A M30.5 x 0.5 bandpass Midwest Optical 518 - 538
28 538 nm 518 nm N/A N/A No Filter Thread bandpass Midwest Optical 518 - 538
28 640 nm 625 nm N/A N/A M52 x 0.75 bandpass Midwest Optical 625 - 640
20 358 nm 344 nm N/A N/A C-Mount bandpass Midwest Optical 344 - 358
25 390 nm 370 nm N/A N/A C-Mount bandpass Midwest Optical 370 - 390
30 915 nm 895 nm N/A N/A M62 x 0.75 bandpass Midwest Optical 895 - 915
28 538 nm 518 nm N/A N/A M58 x 0.75 bandpass Midwest Optical 518 - 538
30 665 nm 643 nm N/A N/A M77 x 0.75 bandpass Midwest Optical 643 - 665
35 465 nm 445 nm N/A N/A M55 x 0.75 bandpass Midwest Optical 445 - 465
30 415 nm 400 nm N/A N/A No Filter Thread bandpass Midwest Optical 400 - 415
33 860 nm 845 nm N/A N/A No Filter Thread bandpass Midwest Optical 845 - 860
35 1310 nm 1290 nm N/A N/A No Filter Thread bandpass Midwest Optical 1290 - 1310
35 1460 nm 1440 nm N/A N/A No Filter Thread bandpass Midwest Optical 1440 - 1460
35 1560 nm 1540 nm N/A N/A No Filter Thread bandpass Midwest Optical 1540 - 1560
28 538 nm 518 nm N/A N/A M27 x 0.5 bandpass Midwest Optical 518 - 538
25 692 nm 675 nm N/A N/A M27 x 0.5 bandpass Midwest Optical 675 - 692
23 620 nm 605 nm N/A N/A M27 x 0.5 bandpass Midwest Optical 605 - 620
35 1560 nm 1540 nm N/A N/A M30.5 x 0.5 bandpass Midwest Optical 1540 - 1560
33 558 nm 535 nm N/A N/A M67 x 0.75 bandpass Midwest Optical 535 - 558
35 1460 nm 1440 nm N/A N/A M43 x 0.75 bandpass Midwest Optical 1440 - 1460
32 952 nm 930 nm N/A N/A M27 x 0.5 bandpass Midwest Optical 930 - 952
25 390 nm 370 nm N/A N/A M27 x 0.5 bandpass Midwest Optical 370 - 390
20 358 nm 344 nm N/A N/A M52 x 0.75 bandpass Midwest Optical 344 - 358
33 558 nm 535 nm N/A N/A M52 x 0.75 bandpass Midwest Optical 535 - 558
30 765 nm 740 nm N/A N/A M72 x 0.75 bandpass Midwest Optical 740 - 765
30 765 nm 740 nm N/A N/A M58 x 0.75 bandpass Midwest Optical 740 - 765
25 525 nm 515 nm N/A N/A M39 x 0.75 bandpass Midwest Optical 515 - 525
25 525 nm 515 nm N/A N/A No Filter Thread bandpass Midwest Optical 515 - 525
25 692 nm 675 nm N/A N/A No Filter Thread bandpass Midwest Optical 675 - 692
30 915 nm 895 nm N/A N/A M55 x 0.75 bandpass Midwest Optical 895 - 915
32 952 nm 930 nm N/A N/A M55 x 0.75 bandpass Midwest Optical 930 - 952
28 538 nm 518 nm N/A N/A M46 x 0.75 bandpass Midwest Optical 518 - 538
35 1560 nm 1540 nm N/A N/A M55 x 0.75 bandpass Midwest Optical 1540 - 1560
30 915 nm 895 nm N/A N/A M25.5 x 0.5 bandpass Midwest Optical 895 - 915
28 640 nm 625 nm N/A N/A No Filter Thread bandpass Midwest Optical 625 - 640
25 692 nm 675 nm N/A N/A M37 x 0.5 bandpass Midwest Optical 675 - 692
35 1460 nm 1440 nm N/A N/A M37 x 0.5 bandpass Midwest Optical 1440 - 1460
35 1310 nm 1290 nm N/A N/A M37.5 x 0.5 bandpass Midwest Optical 1290 - 1310
28 538 nm 518 nm N/A N/A M43 x 0.75 bandpass Midwest Optical 518 - 538
35 465 nm 445 nm N/A N/A M43 x 0.75 bandpass Midwest Optical 445 - 465
25 525 nm 515 nm N/A N/A No Filter Thread bandpass Midwest Optical 515 - 525
35 1560 nm 1540 nm N/A N/A M34 x 0.5 bandpass Midwest Optical 1540 - 1560

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