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BP 635-50 HT 
Bandpass Filter


Key features

  • Average transmittance 95%
  • Steep slopes
  • Wavelength tolerance +/- 1%
  • Deep blocking / High optical density
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Schneider-Kreuznach Bandpass Filter BP 635-50 HT

Schneider-Kreuznach magnetron sputtered industrial bandpass filters impress with steep slopes and high transmission at stable cut-on and cut-off wavelengths. The very flat surface makes them ideal for high end inspection systems. Schneider-Kreuznach bandpass filters are RoHS conform. Custom sizes and shapes are available on request.

The Schneider-Kreuznach BP 635-50 HT magnetron sputtered industrial bandpass filter offers steep slopes, high transmission, and stable cut-on and cut-off wavelengths. Its exceptionally flat surface ensures optimal performance in high-end inspection systems. RoHS compliant and available in custom sizes and shapes, it is ideal for applications in machine vision, automated optical inspection, and industrial quality control.

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Datasheet
Transmission
Product sheet
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Product brochure 2024
Product brochure 2025

Technical specifications: BP 635-50 HT Bandpass Filter

TypeStandard
Wavelength range, 50%-50%610-660 nm
Center Wavelength635 nm
Bandwidth50 nm
Angle of incidence0° +/- 8°
Cut-on wavelength610 +/- 6 nm
Cut-off wavelength660 +/- 7 nm
Transmittance630 - 640 nm: Tabs > 90%
Blocking< 550 nm: Tabs < 0.5%
710 - 1050 nm: Tabs < 1.0%
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 Bandpass Filter BP 635-50 HT



Transmission of the BP 635-50 HT Filter

 

Transmission Data

 

Download Excel

Wavelength (nm) Transmission (%)
350 0.02
351 0.01
352 0.02
353 0.04
354 0.04
355 0.02
356 0.01
357 0.02
358 0.00
359 0.01
360 0.02
361 0.03
362 0.05
363 0.01
364 0.00
365 0.00
366 0.00
367 0.01
368 0.03
369 0.03
370 0.03
371 0.01
372 -0.01
373 0.02
374 0.00
375 0.01
376 0.02
377 0.07
378 0.04
379 0.01
380 0.04
381 0.03
382 0.01
383 0.00
384 0.05
385 0.05
386 0.05
387 0.04
388 0.04
389 0.03
390 0.03
391 0.03
392 0.03
393 0.03
394 0.02
395 0.02
396 0.02
397 0.02
398 0.02
399 0.02
400 0.03
401 0.03
402 0.03
403 0.04
404 0.05
405 0.07
406 0.10
407 0.12
408 0.14
409 0.13
410 0.11
411 0.09
412 0.08
413 0.08
414 0.08
415 0.08
416 0.08
417 0.09
418 0.09
419 0.10
420 0.11
421 0.12
422 0.14
423 0.17
424 0.21
425 0.27
426 0.30
427 0.29
428 0.25
429 0.18
430 0.14
431 0.11
432 0.07
433 0.07
434 0.06
435 0.05
436 0.04
437 0.03
438 0.03
439 0.03
440 0.03
441 0.04
442 0.05
443 0.04
444 0.05
445 0.05
446 0.08
447 0.11
448 0.17
449 0.25
450 0.27
451 0.21
452 0.14
453 0.09
454 0.06
455 0.04
456 0.04
457 0.04
458 0.03
459 0.03
460 0.02
461 0.02
462 0.02
463 0.02
464 0.02
465 0.03
466 0.03
467 0.03
468 0.03
469 0.02
470 0.03
471 0.03
472 0.04
473 0.04
474 0.04
475 0.03
476 0.03
477 0.03
478 0.02
479 0.02
480 0.02
481 0.03
482 0.03
483 0.02
484 0.02
485 0.02
486 0.02
487 0.02
488 0.02
489 0.02
490 0.02
491 0.02
492 0.02
493 0.02
494 0.02
495 0.02
496 0.02
497 0.02
498 0.02
499 0.02
500 0.02
501 0.02
502 0.02
503 0.02
504 0.02
505 0.03
506 0.03
507 0.02
508 0.03
509 0.03
510 0.03
511 0.03
512 0.03
513 0.04
514 0.03
515 0.03
516 0.03
517 0.03
518 0.03
519 0.03
520 0.04
521 0.04
522 0.03
523 0.03
524 0.03
525 0.03
526 0.03
527 0.03
528 0.04
529 0.04
530 0.03
531 0.03
532 0.03
533 0.03
534 0.03
535 0.04
536 0.04
537 0.04
538 0.05
539 0.05
540 0.05
541 0.05
542 0.05
543 0.06
544 0.06
545 0.07
546 0.08
547 0.08
548 0.09
549 0.10
550 0.11
551 0.12
552 0.14
553 0.16
554 0.18
555 0.20
556 0.22
557 0.25
558 0.27
559 0.31
560 0.36
561 0.40
562 0.43
563 0.47
564 0.51
565 0.56
566 0.61
567 0.66
568 0.71
569 0.77
570 0.83
571 0.89
572 0.95
573 1.02
574 1.10
575 1.18
576 1.27
577 1.37
578 1.48
579 1.59
580 1.72
581 1.87
582 2.03
583 2.21
584 2.42
585 2.65
586 2.90
587 3.19
588 3.51
589 3.88
590 4.30
591 4.76
592 5.30
593 5.91
594 6.60
595 7.38
596 8.26
597 9.27
598 10.44
599 11.76
600 13.28
601 15.00
602 16.98
603 19.20
604 21.73
605 24.55
606 27.75
607 31.25
608 35.24
609 39.51
610 44.17
611 49.09
612 54.27
613 59.49
614 64.73
615 69.77
616 74.58
617 78.96
618 82.87
619 86.15
620 88.88
621 91.04
622 92.69
623 93.90
624 94.77
625 95.30
626 95.61
627 95.80
628 95.83
629 95.84
630 95.74
631 95.68
632 95.56
633 95.44
634 95.37
635 95.29
636 95.22
637 95.16
638 95.12
639 95.14
640 95.14
641 95.13
642 95.12
643 95.08
644 95.02
645 94.87
646 94.66
647 94.41
648 94.04
649 93.50
650 92.79
651 91.73
652 90.24
653 88.00
654 84.90
655 80.56
656 75.13
657 68.44
658 61.09
659 53.19
660 45.54
661 38.38
662 32.13
663 26.76
664 22.31
665 18.63
666 15.65
667 13.27
668 11.35
669 9.80
670 8.55
671 7.54
672 6.69
673 6.00
674 5.42
675 4.91
676 4.47
677 4.08
678 3.72
679 3.38
680 3.06
681 2.74
682 2.44
683 2.15
684 1.89
685 1.61
686 1.39
687 1.19
688 1.03
689 0.89
690 0.76
691 0.66
692 0.58
693 0.51
694 0.45
695 0.40
696 0.36
697 0.33
698 0.30
699 0.28
700 0.26
701 0.25
702 0.23
703 0.23
704 0.22
705 0.22
706 0.22
707 0.22
708 0.22
709 0.23
710 0.24
711 0.25
712 0.26
713 0.27
714 0.29
715 0.30
716 0.30
717 0.31
718 0.31
719 0.30
720 0.28
721 0.26
722 0.24
723 0.21
724 0.19
725 0.17
726 0.15
727 0.13
728 0.12
729 0.11
730 0.11
731 0.09
732 0.09
733 0.09
734 0.08
735 0.08
736 0.08
737 0.09
738 0.09
739 0.09
740 0.09
741 0.10
742 0.11
743 0.13
744 0.14
745 0.17
746 0.20
747 0.23
748 0.26
749 0.27
750 0.27
751 0.24
752 0.21
753 0.16
754 0.13
755 0.10
756 0.08
757 0.06
758 0.05
759 0.04
760 0.03
761 0.03
762 0.03
763 0.02
764 0.02
765 0.02
766 0.02
767 0.02
768 0.02
769 0.02
770 0.02
771 0.02
772 0.02
773 0.02
774 0.02
775 0.02
776 0.02
777 0.02
778 0.02
779 0.02
780 0.03
781 0.03
782 0.03
783 0.04
784 0.05
785 0.06
786 0.07
787 0.08
788 0.08
789 0.07
790 0.06
791 0.04
792 0.03
793 0.03
794 0.02
795 0.02
796 0.01
797 0.01
798 0.01
799 0.01
800 0.01
801 0.01
802 0.01
803 0.01
804 0.01
805 0.01
806 0.00
807 0.01
808 0.01
809 0.01
810 0.01
811 0.01
812 0.01
813 0.00
814 0.00
815 0.00
816 0.01
817 0.01
818 0.01
819 0.01
820 0.00
821 0.00
822 0.00
823 0.00
824 0.01
825 0.01
826 0.01
827 0.01
828 0.01
829 0.01
830 0.01
831 0.01
832 0.01
833 0.02
834 0.02
835 0.03
836 0.04
837 0.07
838 0.10
839 0.10
840 0.07
841 0.05
842 0.03
843 0.02
844 0.01
845 0.01
846 0.01
847 0.01
848 0.01
849 0.01
850 0.01
851 0.00
852 0.01
853 0.00
854 0.00
855 0.00
856 0.01
857 0.01
858 0.01
859 0.00
860 0.00
861 0.00
862 0.00
863 0.00
864 0.01
865 0.01
866 0.01
867 0.00
868 0.00
869 0.00
870 0.00
871 0.00
872 0.01
873 0.01
874 0.01
875 0.00
876 0.00
877 0.00
878 0.00
879 0.01
880 0.01
881 0.01
882 0.01
883 0.00
884 0.00
885 0.01
886 0.01
887 0.01
888 0.01
889 0.01
890 0.01
891 0.01
892 0.01
893 0.01
894 0.01
895 0.01
896 0.01
897 0.02
898 0.02
899 0.02
900 0.03
901 0.04
902 0.05
903 0.05
904 0.04
905 0.03
906 0.03
907 0.02
908 0.01
909 0.01
910 0.01
911 0.01
912 0.01
913 0.01
914 0.01
915 0.00
916 0.00
917 0.00
918 0.00
919 0.00
920 0.00
921 0.01
922 0.00
923 0.00
924 0.00
925 0.00
926 0.00
927 0.00
928 0.00
929 0.01
930 0.00
931 0.00
932 0.00
933 0.00
934 0.00
935 0.00
936 0.01
937 0.01
938 0.01
939 0.00
940 0.00
941 0.00
942 0.00
943 0.00
944 0.00
945 0.01
946 0.01
947 0.01
948 0.00
949 0.00
950 0.00
951 0.00
952 0.01
953 0.01
954 0.01
955 0.01
956 0.01
957 0.00
958 0.01
959 0.01
960 0.01
961 0.02
962 0.02
963 0.01
964 0.01
965 0.01
966 0.01
967 0.02
968 0.02
969 0.03
970 0.03
971 0.02
972 0.02
973 0.03
974 0.03
975 0.04
976 0.04
977 0.06
978 0.06
979 0.04
980 0.05
981 0.04
982 0.04
983 0.03
984 0.03
985 0.03
986 0.03
987 0.02
988 0.02
989 0.02
990 0.02
991 0.02
992 0.02
993 0.02
994 0.02
995 0.01
996 0.01
997 0.01
998 0.01
999 0.01
1000 0.02

 

 

Mounted Industrial Filter [IF]

MountThicknessID
CMT2mm1085680
CMT1mm1101098
SH 25.52mm1084445
SH 25.51mmOn request only
SH 27.02mm1084641
SH 27.01mmOn request only
SN1 30.52mm1085091
SN1 30.51mmOn request only
SH 34.02mm1106744
SH 34.01mmOn request only
SH 35.52mm1085185
SH 35.51mmOn request only
SH 37.02mm1085816
SH 37.01mmOn request only
SH 39.02mm1106745
SH 40.52mm1084423
SH 43.02mm1083606
SH 46.02mm1086649
SH 49.02mm1090632

Order nomenclature
IF BP 635-50 HT [Mount] [Thickness]
Example: IF BP 635-50 HT SH 25.5 2
 

Unmounted Industrial Filterglass [IFG]

DiameterThicknessID
22.0 mm2mm1095000
22.0 mm1mmID to be defined
23.0 mm2mmID to be defined
23.0 mm1mmOn request only
24.0 mm2mmID to be defined
24.0 mm1mmOn request only
29.0 mm2mmID to be defined
29.0 mm1mmOn request only
31.0 mm2mmID to be defined
31.0 mm1mmOn request only
33.0 mm2mmID to be defined
33.0 mm1mmOn request only
34.0 mm2mm1082535
34.0 mm1mm1101097
36.0 mm2mmID to be defined
38.0 mm2mmID to be defined
40.0 mm2mm1097122
43.0 mm2mm1082536
46.0 mm2mmID to be defined

Order nomenclature
IFG BP 635-50 HT [Diameter] [Thickness]
Example: IFG BP 635-50 HT 23.0 2
 

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



 

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Ringstraße 132
55543 Bad Kreuznach | Germany
+49 (0) 671 601 0

 

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