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NBP 488-20 HT 
Narrow Bandpass Filter


Key features

  • Average transmittance 90%
  • Steep slopes
  • Wavelength tolerance +/- 3nm
  • Deep blocking / High optical density
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Schneider-Kreuznach Narrow Bandpass Filter NBP 488-20 HT

Schneider-Kreuznach Narrow Bandpass Filters are designed for applications requiring precise wavelength selection, such as laser systems, 3D measurement, and metrology. With steep slopes, high transmission (up to 90%), and deep blocking outside the passband, these filters ensure accurate results in demanding environments. 

The Schneider-Kreuznach NBP 488-20 HT magnetron sputtered industrial Narrow Bandpass Filter features steep slopes for sophisticated applications that require a sharp transition between high transmission and deep blocking at stable cut-on and cut-off wavelengths. The layers are applied by means of magnetron sputtering, a special coating process. Schneider-Kreuznach narrow bandpass filters are RoHS conform. Custom sizes are available on request.

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Datasheet
Transmission
Product sheet
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Product brochure 2024
Product brochure 2025

Technical specifications: NBP 488-20 HT Narrow Bandpass Filter

TypeOn request
Wavelength range, 50%-50%478-498 nm
Center Wavelength488 nm
Bandwidth20 nm
Angle of incident0° +/- 8°
Central Wavelength (CWL)488 +/- 3nm
Full Width at Half Maximum (FWHM)22 +/- 1nm
Transmittance486 - 490 nm: Tabs > 90%
Blocking< 460 nm: Tabs < 0.5%
515 - 990 nm: Tabs < 0.5%
Wavefront distortionØ >18 - 30 mm: 13/ 1(0.25) | Ø >30 - 50 mm: 13/ 1(0.30)
Parallelism1'
Glass thickness tolerance+/- 0.08mm

Filter specifications glossary

 

Specification Description
Angle of incidence (AOI) Angle between a ray of light and the surface normal to the surface it strikes
Cut-on wavelength Wavelength at which the transmission of the lower edge rises to 50%
Cut-off wavelength Wavelength at which the transmission of hhe upper edge drops to 50%
Central Wavelength (CWL) Center of the filter’s passband for which it is primarily designed
Full Width at Half Maximum (FWHM) Spectral bandwidth measured at 50% of the peak transmittance
Transmittance Ratio of transmitted light intensity to incident light intensity
Blocking Strong attenuation of light intensity over a specified wavelength range
Wavefront distortion Deviation of the transmitted wavefront from a reference plane
Parallelism Angular deviation between the two main surfaces of the filter
Glass thickness tolerance Permissible deviation from the specified substrate thickness
Wavelength range Spectral region over which the filter is designed to operate
Coating Applied layer(s) defining the filter’s spectral characteristics
Temperature range Recommended operational limits for ambient or device temperature
Glass thickness Nominal thickness of the filter glass
Optical density Attenuation measure defined as −log₁₀ of transmittance
Transmittance average Average light transmission across the specified wavelength range
Wavelength Wavelength range at which the polarizer specification applies
Transmittance, unpolarized light Ratio of transmitted to incident intensity for unpolarized light
Extinction ratio Ratio of transmitted intensity along the polarizer’s pass axis to that along its block axis
Max. size Largest standard dimension for the polarizer film
Temperature range Minimum to maximum temperature for reliable performance
Substrate Base material on which the polarizing film is applied
Thickness Nominal overall thickness of the polarizer film
Info Unless otherwise stated, all dimensions in this data sheet are in mm

 

Picture of the filter

Schneider-Kreuznach Narrow Bandpass Filter NBP 488-20 HT



Transmission of the NBP 488-20 HT Filter

 

Transmission Data

 

Download Excel

Wavelength (nm) Transmission (%)
350 0.002988
351 0.002988
352 0.002988
353 0.002988
354 0.002988
355 0.002988
356 0.002988
357 0.002988
358 0.002988
359 0.002988
360 0.002988
361 0.002988
362 0.002988
363 0.002988
364 0.002988
365 0.002988
366 0.002988
367 0.002988
368 0.002988
369 0.002988
370 0.002988
371 0.002988
372 0.002988
373 0.002988
374 0.002988
375 0.002988
376 0.002988
377 0.002988
378 0.002988
379 0.002988
380 0.002988
381 0.002988
382 0.002988
383 0.002988
384 0.002988
385 0.002988
386 0.002988
387 0.002988
388 0.002988
389 0.002988
390 0.002988
391 0.002988
392 0.002988
393 0.002988
394 0.002988
395 0.002988
396 0.002988
397 0.002988
398 0.002988
399 0.002988
400 0.002988
401 0.002988
402 0.002988
403 0.002988
404 0.002988
405 0.002988
406 0.002988
407 0.002988
408 0.002988
409 0.002988
410 0.002988
411 0.002988
412 0.002988
413 0.002988
414 0.002988
415 0.002988
416 0.002988
417 0.002988
418 0.002988
419 0.002988
420 0.002988
421 0.002988
422 0.002988
423 0.002988
424 0.002988
425 0.002988
426 0.002988
427 0.002988
428 0.002988
429 0.002988
430 0.002988
431 0.002988
432 0.002988
433 0.002988
434 0.002988
435 0.002988
436 0.002988
437 0.002988
438 0.002988
439 0.002988
440 0.002988
441 0.002988
442 0.002988
443 0.002988
444 0.002988
445 0.002988
446 0.002988
447 0.002988
448 0.002988
449 0.002988
450 0.002988
451 0.002988
452 0.002988
453 0.002988
454 0.002988
455 0.002988
456 0.002988
457 0.002988
458 0.002988
459 0.002988
460 0.002988
461 0.002988
462 0.002988
463 0.002988
464 0.002988
465 0.002988
466 0.002988
467 0.002988
468 0.002988
469 0.002988
470 0.002988
471 0.002988
472 0.002988
473 0.002988
474 1.000301
475 2.277233
476 5.619735
477 15.48342
478 37.703724
479 68.022957
480 89.385084
481 94.88531
482 95.105214
483 95.188006
484 95.340262
485 95.186439
486 95.088614
487 95.335345
488 95.710045
489 95.796958
490 95.423024
491 94.674258
492 93.964907
493 93.51225
494 93.206727
495 92.774169
496 92.344618
497 92.049532
498 90.237257
499 80.15766
500 58.498085
501 33.056705
502 15.059248
503 6.693368
504 2.998982
505 1.48643
506 0.002988
507 0.002988
508 0.002988
509 0.002988
510 0.002988
511 0.002988
512 0.002988
513 0.002988
514 0.002988
515 0.002988
516 0.002988
517 0.002988
518 0.002988
519 0.002988
520 0.002988
521 0.002988
522 0.002988
523 0.002988
524 0.002988
525 0.002988
526 0.002988
527 0.002988
528 0.002988
529 0.002988
530 0.002988
531 0.002988
532 0.002988
533 0.002988
534 0.002988
535 0.002988
536 0.002988
537 0.002988
538 0.002988
539 0.002988
540 0.002988
541 0.002988
542 0.002988
543 0.002988
544 0.002988
545 0.002988
546 0.002988
547 0.002988
548 0.002988
549 0.002988
550 0.002988
551 0.002988
552 0.002988
553 0.002988
554 0.002988
555 0.002988
556 0.002988
557 0.002988
558 0.002988
559 0.002988
560 0.002988
561 0.002988
562 0.002988
563 0.002988
564 0.002988
565 0.002988
566 0.002988
567 0.002988
568 0.002988
569 0.002988
570 0.002988
571 0.002988
572 0.002988
573 0.002988
574 0.002988
575 0.002988
576 0.002988
577 0.002988
578 0.002988
579 0.002988
580 0.002988
581 0.002988
582 0.002988
583 0.002988
584 0.002988
585 0.002988
586 0.002988
587 0.002988
588 0.002988
589 0.002988
590 0.002988
591 0.002988
592 0.002988
593 0.002988
594 0.002988
595 0.002988
596 0.002988
597 0.002988
598 0.002988
599 0.002988
600 0.002988
601 0.002988
602 0.002988
603 0.002988
604 0.002988
605 0.002988
606 0.002988
607 0.002988
608 0.002988
609 0.002988
610 0.002988
611 0.002988
612 0.002988
613 0.002988
614 0.002988
615 0.002988
616 0.002988
617 0.002988
618 0.002988
619 0.002988
620 0.002988
621 0.002988
622 0.002988
623 0.002988
624 0.002988
625 0.002988
626 0.002988
627 0.002988
628 0.002988
629 0.002988
630 0.002988
631 0.002988
632 0.002988
633 0.002988
634 0.002988
635 0.002988
636 0.002988
637 0.002988
638 0.002988
639 0.002988
640 0.002988
641 0.002988
642 0.002988
643 0.002988
644 0.002988
645 0.002988
646 0.002988
647 0.002988
648 0.002988
649 0.002988
650 0.002988
651 0.002988
652 0.002988
653 0.002988
654 0.002988
655 0.002988
656 0.002988
657 0.002988
658 0.002988
659 0.002988
660 0.002988
661 0.002988
662 0.002988
663 0.002988
664 0.002988
665 0.002988
666 0.002988
667 0.002988
668 0.002988
669 0.002988
670 0.002988
671 0.002988
672 0.002988
673 0.002988
674 0.002988
675 0.002988
676 0.002988
677 0.002988
678 0.002988
679 0.002988
680 0.002988
681 0.002988
682 0.002988
683 0.002988
684 0.002988
685 0.002988
686 0.002988
687 0.002988
688 0.002988
689 0.002988
690 0.002988
691 0.002988
692 0.002988
693 0.002988
694 0.002988
695 0.002988
696 0.002988
697 0.002988
698 0.002988
699 0.002988
700 0.002988
701 0.002988
702 0.002988
703 0.002988
704 0.002988
705 0.002988
706 0.002988
707 0.002988
708 0.002988
709 0.002988
710 0.002988
711 0.002988
712 0.002988
713 0.002988
714 0.002988
715 0.002988
716 0.002988
717 0.002988
718 0.002988
719 0.002988
720 0.002988
721 0.002988
722 0.002988
723 0.002988
724 0.002988
725 0.002988
726 0.002988
727 0.002988
728 0.002988
729 0.002988
730 0.002988
731 0.002988
732 0.002988
733 0.002988
734 0.002988
735 0.002988
736 0.002988
737 0.002988
738 0.002988
739 0.002988
740 0.002988
741 0.002988
742 0.002988
743 0.002988
744 0.002988
745 0.002988
746 0.002988
747 0.002988
748 0.002988
749 0.002988
750 0.002988
751 0.002988
752 0.002988
753 0.002988
754 0.002988
755 0.002988
756 0.002988
757 0.002988
758 0.002988
759 0.002988
760 0.002988
761 0.002988
762 0.002988
763 0.002988
764 0.002988
765 0.002988
766 0.002988
767 0.002988
768 0.002988
769 0.002988
770 0.002988
771 0.002988
772 0.002988
773 0.002988
774 0.002988
775 0.002988
776 0.002988
777 0.002988
778 0.002988
779 0.002988
780 0.002988
781 0.002988
782 0.002988
783 0.002988
784 0.002988
785 0.002988
786 0.002988
787 0.002988
788 0.002988
789 0.002988
790 0.002988
791 0.002988
792 0.002988
793 0.002988
794 0.002988
795 0.002988
796 0.002988
797 0.002988
798 0.002988
799 0.002988
800 0.002988
801 0.002988
802 0.002988
803 0.002988
804 0.002988
805 0.002988
806 0.002988
807 0.002988
808 0.002988
809 0.002988
810 0.002988
811 0.002988
812 0.002988
813 0.002988
814 0.002988
815 0.002988
816 0.002988
817 0.002988
818 0.002988
819 0.002988
820 0.002988
821 0.002988
822 0.002988
823 0.002988
824 0.002988
825 0.002988
826 0.002988
827 0.002988
828 0.002988
829 0.002988
830 0.002988
831 0.002988
832 0.002988
833 0.002988
834 0.002988
835 0.002988
836 0.002988
837 0.002988
838 0.002988
839 0.002988
840 0.002988
841 0.002988
842 0.002988
843 0.002988
844 0.002988
845 0.002988
846 0.002988
847 0.002988
848 0.002988
849 0.002988
850 0.002988
851 0.002988
852 0.002988
853 0.002988
854 0.002988
855 0.002988
856 0.002988
857 0.002988
858 0.002988
859 0.002988
860 0.002988
861 0.002988
862 0.002988
863 0.002988
864 0.002988
865 0.002988
866 0.002988
867 0.002988
868 0.002988
869 0.002988
870 0.002988
871 0.002988
872 0.002988
873 0.002988
874 0.002988
875 0.002988
876 0.002988
877 0.002988
878 0.002988
879 0.002988
880 0.002988
881 0.002988
882 0.002988
883 0.002988
884 0.002988
885 0.002988
886 0.002988
887 0.002988
888 0.002988
889 0.002988
890 0.002988
891 0.002988
892 0.002988
893 0.002988
894 0.002988
895 0.002988
896 0.002988
897 0.002988
898 0.002988
899 0.002988
900 0.002988
901 0.002988
902 0.002988
903 0.002988
904 0.002988
905 0.002988
906 0.002988
907 0.002988
908 0.002988
909 0.002988
910 0.002988
911 0.002988
912 0.002988
913 0.002988
914 0.002988
915 0.002988
916 0.002988
917 0.002988
918 0.002988
919 0.002988
920 0.002988
921 0.002988
922 0.002988
923 0.002988
924 0.002988
925 0.002988
926 0.002988
927 0.002988
928 0.002988
929 0.002988
930 0.002988
931 0.002988
932 0.002988
933 0.002988
934 0.002988
935 0.002988
936 0.002988
937 0.002988
938 0.002988
939 0.002988
940 0.002988
941 0.002988
942 0.002988
943 0.002988
944 0.002988
945 0.002988
946 0.002988
947 0.002988
948 0.002988
949 0.002988
950 0.002988
951 0.002988
952 0.002988
953 0.002988
954 0.002988
955 0.002988
956 0.002988
957 0.002988
958 0.002988
959 0.002988
960 0.002988
961 0.002988
962 0.002988
963 0.002988
964 0.002988
965 0.002988
966 0.002988
967 0.002988
968 0.002988
969 0.002988
970 0.002988
971 0.002988
972 0.002988
973 0.002988
974 0.002988
975 0.002988
976 0.002988
977 0.002988
978 0.002988
979 0.002988
980 0.002988
981 0.002988
982 0.002988
983 0.002988
984 0.002988
985 0.002988
986 0.002988
987 0.002988
988 0.002988
989 0.002988
990 0.002988
991 0.002988
992 0.002988
993 0.002988
994 0.002988
995 0.002988
996 0.002988
997 0.002988
998 0.002988
999 0.002988
1000 0.002988
1001 0.002988
1002 0.002988
1003 0.002988
1004 0.002988
1005 0.002988
1006 0.002988
1007 0.002988
1008 0.002988
1009 0.002988
1010 0.002988
1011 0.002988
1012 0.002988
1013 0.002988
1014 0.002988
1015 0.002988
1016 0.002988
1017 0.002988
1018 0.002988
1019 0.002988
1020 0.002988
1021 0.002988
1022 0.002988
1023 0.002988
1024 0.002988
1025 0.002988
1026 0.002988
1027 0.002988
1028 0.002988
1029 0.002988
1030 0.002988
1031 0.002988
1032 0.002988
1033 0.002988
1034 0.002988
1035 0.002988
1036 0.002988
1037 0.002988
1038 0.002988
1039 0.002988
1040 0.002988
1041 0.002988
1042 0.002988
1043 0.002988
1044 0.002988
1045 0.002988
1046 0.002988
1047 0.002988
1048 0.002988
1049 0.002988
1050 0.002988
1051 0.002988
1052 0.002988
1053 0.002988
1054 0.002988
1055 0.002988
1056 0.002988
1057 0.002988
1058 0.002988
1059 0.002988
1060 0.002988
1061 0.002988
1062 0.002988
1063 0.002988
1064 0.002988
1065 0.002988
1066 0.002988
1067 0.002988
1068 0.002988
1069 0.002988
1070 0.002988
1071 0.002988
1072 0.002988
1073 0.002988
1074 0.002988
1075 0.002988
1076 0.002988
1077 0.002988
1078 0.002988
1079 0.002988
1080 0.002988
1081 0.002988
1082 0.002988
1083 0.002988
1084 0.002988
1085 0.002988
1086 0.002988
1087 0.002988
1088 0.002988
1089 0.002988
1090 0.002988
1091 0.002988
1092 0.002988
1093 0.002988
1094 0.002988
1095 0.002988
1096 0.002988
1097 0.002988
1098 0.002988
1099 0.002988
1100 0.002988

Mounts for Industrial Optical Filters

C-Mount

Defined by 1” (25.4mm) diameter and 32 turns per inch pitch, the C-Mount thread is a popular camera mount in machine vision industry. Schneider-Kreuznach offers a C-Mount option for most filters. So filters can go in any C-Mount based mechanics in vision systems.

Another popular application, C-Mounts can easily be used for, is placing a filter in front of the sensor into the camera. The extension of the back flange distance has to be considered for imaging applications.

Key Features of C-Mount Filters:
• Fits in C-Mount cameras
• Black Anodized Brass

Applications of C-Mount Filters:
• To be mounted in C-Mount cameras
• Vision Systems based on C-Mount mechanics

Thread Diameter Clear Thickness
Aperture
1'' - 32 25.4 mm 21.1 mm 3.6 mm

 

Filter C-Mount

 

 

SH-Mount

Schneider-Kreuznach offers a variety of mounts with common thread sizes to fit on most camera lens systems. SH-Mount is the standard, when high flexibility is needed. Filters are held by retainer rings. SH-Mounts are extreme robust.

All SH-Mounts have a female and male M-thread, and can be stacked if several filters must be combined.

Key features of SH-Mount Filters:
• Stackable
• ​​​​​Robust
• Black Anodized Brass

Applications of SH-Mount Filters:
• Mounted on lenses in imaging applications
• Mounted on measurement instruments

Thread Diameter Clear Thickness
Aperture
M 25.5x0.5 29.5 mm 20.8mm 6.4 mm
M 27.0x0.5 31.0 mm 21.8 mm 6.4 mm
M 35.5x0.5 39.5 mm 29.8 mm 6.4 mm
M 37.0x0.75 41.0 mm 31.8 mm 6.9 mm
M 39.0x0.5 43.0 mm 33.8 mm 6.4 mm
M 40.5x0.5 44.5 mm 35.8 mm 6.4 mm
M 43.0x0.75 47.0 mm 37.8 mm 6.9 mm
M 46.0x0.75 50.0 mm 40.8 mm 6.9 mm
M 49.0x0.75 53.0 mm 43.8 mm 6.9 mm
M 52.0x0.75 56.0 mm 46.8 mm 6.9 mm
M 55.0x0.75 59.0 mm 49.8 mm 6.9 mm
M 58.0x0.75 62.0 mm 52.8 mm 6.9 mm
M 62.0x0.75 66.0 mm 56.8 mm 6.9 mm
M 67.0x0.75 71.0 mm 61.8 mm 6.9 mm

 

SH Filter-Mount

 

SN1-Mount

The SN1-Mount was designed for the in machine vision popular M30.5x0.5 thread. With its high clear aperture, vignetting can be avoided, even for wide angle applications. The filter is glued into the mount, in order to secure it against vibrations when integrated into robots or production lines. It is ideal to be used in automated fabrication.

SN1-Mounts have a male and female M-thread, and can be stacked if several filters must be combined.

Key features SN1-Mount Filters:
• Maximum Clear Aperture
• No vignetting
• Stackable
• Robust
• Black Anodized Brass

Applications SN1-Mount Filters:
• Mounted on lenses in imaging applications
• Mounted on measurement instruments

Thread Diameter Clear Thickness
Aperture
M 30.5x0.5 32 mm 28 mm 6.5 mm

 

SN1 Filter-Mount

 

SN1-Mount

The SN2-Mount is designed for polarizers and achieves highest possible aperture, avoiding vignetting in machine vision systems. Its unique locking mechanism fixes the correct orientation, even in typical industrial environment. The filters are glued into the mount to secure them against vibrations when integrated into robots or production lines. Ideal for use in automated fabrication.

SN2-Mounts have a female and male M-thread, and can be stacked if several filters must be combined.

Key features:
• Rotatable
• High clear Aperture
• No vignetting
• Stackable
• Robust
• Black Anodized Brass

Applications:
• Mounted on lenses in imaging applications
• Mounted on measurement instruments

Thread Diameter Clear Thickness
Aperture
M 25.5x0.5 27 mm 22.7 mm 7.4 mm
M 27.0x0.5 28.5 mm 23.7 mm 7.4 mm
M 30.5x0.5 32 mm 26.7 mm 7.4 mm
M 35.5 x0.5 37 mm 31.7 mm 7.4 mm
M 37.0x0.75 38.5 mm 32.7 mm 7.4 mm
M 40.5x0.5 42 mm 36.7 mm 7.4 mm
M 43.0x0.75 44.5 mm 37.7 mm 7.4 mm
M 46.0x0.75 47.5 mm 41.7 mm 7.4 mm
M 49.0x0.75 50.5 mm 44.7 mm 7.4 mm

 

SN2 Filter-Mount

DH-Mount

Schneider-Kreuznach offers a variety of mounts for polarizers with common thread sizes to fit on most camera lens systems. The DH-Mount is rotatable to adjust polarization axis in the required orientation. Filters are held by retainer rings.

All DH-Mounts have a female and male M-thread and can be stacked if several filters must be combined.

Key features:
• Rotatable
• Stackable
• Black Anodized Brass

Applications:
• Mounted on lenses in imaging applications
• Mounted on measurement instruments

Thread Diameter Clear Thickness
Aperture
M 25.5x0.5 27 mm 20.8 mm 9.2 mm
M 27.0x0.5 28.5 mm 21.8 mm 9.2 mm
M 30.5x0.5 32 mm 25.8 mm 9.2 mm
M 35.5 x0.5 37 mm 30.8 mm 9.2 mm
M 37.0x0.75 38.5 mm 31.8 mm 9.2 mm
M 40.5x0.5 42 mm 35.8 mm 9.2 mm
M 43.0x0.75 44.5 mm 37.8 mm 9.2 mm
M 46.0x0.75 47.5 mm 40.8 mm 9.2 mm
M 49.0x0.75 50.5 mm 43.8 mm 9.2 mm
M 52.0x0.75 53.5 mm 46.8 mm 9.2 mm
M 55.0x0.75 56.5 mm 49.8 mm 9.2 mm
M 58.0x0.75 59.5 mm 52.8 mm 9.2 mm
M 62.0x0.75 63.5 mm 56.8 mm 9.2 mm
M 67.0x0.75 68.5 mm 61.8 mm 9.2 mm

 

DH Filter-Mount



 

More Narrow Bandpass Filters

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Jos. Schneider Optische Werke GmbH
Ringstraße 132
55543 Bad Kreuznach | Germany
+49 (0) 671 601 0

 

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