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LP 900 HT 
Longpass Filter



Key features

  • Average transmittance 95%
  • Steep slopes
  • Ultra low reflection
  • Deep blocking / High optical density
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Schneider-Kreuznach Longpass Filter LP 900 HT

Schneider-Kreuznach longpass filters deliver high transmission and precise cutoff performance for use in industrial and machine vision applications. Thanks to their steep slopes, flat surfaces, and robust AR coatings, these filters ensure accurate results and minimal reflections even under demanding conditions. 

The Schneider-Kreuznach LP 900 HT magnetron sputtered industrial longpass filter features steep slopes and high transmission at stable cut-on wavelengths. The very flat surface makes it ideal for high end machine vision systems in factory automation. All longpass filters come with superior antireflection coating. Schneider-Kreuznach longpass filters are RoHS conform. Custom sizes are available on request.

Downloads

Technical specifications: LP 900 HT Longpass Filter

TypeStandard
Characteristicsinterference
Angle of indcident0° +/- 8°
Cut-on wavelength900 +/- 10 nm
Transmittance> 920 - 1100 nm: Tabs > 90%
> 920 - 1100 nm: Tave > 95%
Blocking< 860 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 Longpass Filter LP 900 HT



Transmission of the LP 900 HT Filter


 

Transmission Data

 

Download Excel

Wavelength (nm) Transmission (%)
350 0.02
351 0.02
352 0.01
353 0.01
354 0.01
355 0.01
356 0.03
357 0.04
358 0.08
359 0.11
360 0.10
361 0.10
362 0.12
363 0.11
364 0.17
365 0.26
366 0.23
367 0.22
368 0.22
369 0.12
370 0.06
371 0.08
372 0.17
373 0.21
374 0.26
375 0.38
376 0.26
377 0.07
378 0.04
379 0.07
380 0.10
381 0.07
382 0.03
383 0.11
384 0.21
385 0.15
386 0.06
387 0.10
388 0.19
389 0.15
390 0.06
391 0.05
392 0.07
393 0.05
394 0.02
395 0.01
396 0.01
397 0.02
398 0.04
399 0.03
400 0.01
401 0.01
402 0.01
403 0.01
404 0.02
405 0.02
406 0.01
407 0.03
408 0.03
409 0.03
410 0.01
411 0.01
412 0.01
413 0.03
414 0.07
415 0.06
416 0.02
417 0.01
418 0.01
419 0.00
420 0.01
421 0.02
422 0.06
423 0.09
424 0.07
425 0.05
426 0.07
427 0.13
428 0.15
429 0.10
430 0.06
431 0.07
432 0.17
433 0.35
434 0.36
435 0.20
436 0.11
437 0.13
438 0.19
439 0.21
440 0.15
441 0.09
442 0.07
443 0.09
444 0.19
445 0.30
446 0.23
447 0.10
448 0.05
449 0.04
450 0.05
451 0.07
452 0.11
453 0.10
454 0.07
455 0.04
456 0.03
457 0.03
458 0.04
459 0.08
460 0.20
461 0.30
462 0.23
463 0.11
464 0.07
465 0.06
466 0.08
467 0.12
468 0.20
469 0.22
470 0.16
471 0.08
472 0.05
473 0.03
474 0.03
475 0.03
476 0.03
477 0.05
478 0.10
479 0.18
480 0.16
481 0.07
482 0.03
483 0.01
484 0.01
485 0.01
486 0.01
487 0.01
488 0.03
489 0.05
490 0.05
491 0.02
492 0.01
493 0.00
494 0.00
495 0.00
496 0.00
497 0.00
498 0.00
499 0.00
500 0.01
501 0.01
502 0.02
503 0.03
504 0.02
505 0.01
506 0.01
507 0.01
508 0.00
509 0.01
510 0.01
511 0.01
512 0.03
513 0.05
514 0.05
515 0.03
516 0.01
517 0.01
518 0.01
519 0.01
520 0.01
521 0.01
522 0.02
523 0.02
524 0.02
525 0.01
526 0.01
527 0.01
528 0.01
529 0.01
530 0.01
531 0.00
532 0.01
533 0.01
534 0.01
535 0.02
536 0.04
537 0.06
538 0.07
539 0.06
540 0.05
541 0.04
542 0.03
543 0.03
544 0.03
545 0.04
546 0.05
547 0.08
548 0.11
549 0.12
550 0.09
551 0.05
552 0.03
553 0.02
554 0.01
555 0.01
556 0.01
557 0.01
558 0.00
559 0.01
560 0.01
561 0.01
562 0.01
563 0.01
564 0.02
565 0.01
566 0.01
567 0.01
568 0.01
569 0.01
570 0.01
571 0.00
572 0.00
573 0.00
574 0.00
575 0.00
576 0.00
577 0.01
578 0.01
579 0.01
580 0.01
581 0.02
582 0.02
583 0.03
584 0.02
585 0.02
586 0.02
587 0.01
588 0.01
589 0.01
590 0.01
591 0.00
592 0.00
593 0.00
594 0.00
595 0.00
596 0.00
597 0.00
598 0.00
599 0.01
600 0.00
601 0.01
602 0.01
603 0.01
604 0.02
605 0.03
606 0.04
607 0.04
608 0.03
609 0.03
610 0.02
611 0.02
612 0.01
613 0.01
614 0.01
615 0.01
616 0.01
617 0.01
618 0.02
619 0.02
620 0.02
621 0.02
622 0.02
623 0.03
624 0.03
625 0.04
626 0.05
627 0.06
628 0.09
629 0.10
630 0.10
631 0.07
632 0.05
633 0.03
634 0.02
635 0.01
636 0.01
637 0.01
638 0.00
639 0.00
640 0.00
641 0.00
642 0.00
643 0.00
644 0.00
645 0.00
646 0.00
647 0.00
648 0.01
649 0.01
650 0.01
651 0.02
652 0.03
653 0.05
654 0.08
655 0.08
656 0.05
657 0.03
658 0.02
659 0.01
660 0.01
661 0.01
662 0.00
663 0.00
664 0.00
665 0.00
666 0.00
667 0.00
668 0.00
669 0.00
670 0.00
671 0.00
672 0.01
673 0.01
674 0.01
675 0.02
676 0.07
677 0.14
678 0.11
679 0.04
680 0.02
681 0.01
682 0.00
683 0.00
684 0.00
685 0.02
686 0.02
687 0.02
688 0.02
689 0.02
690 0.02
691 0.02
692 0.02
693 0.02
694 0.02
695 0.02
696 0.02
697 0.02
698 0.02
699 0.02
700 0.01
701 0.01
702 0.01
703 0.01
704 0.01
705 0.02
706 0.02
707 0.01
708 0.01
709 0.01
710 0.01
711 0.01
712 0.01
713 0.01
714 0.01
715 0.01
716 0.01
717 0.01
718 0.01
719 0.01
720 0.01
721 0.01
722 0.01
723 0.01
724 0.01
725 0.01
726 0.01
727 0.01
728 0.01
729 0.01
730 0.01
731 0.01
732 0.01
733 0.01
734 0.01
735 0.01
736 0.01
737 0.01
738 0.01
739 0.01
740 0.01
741 0.01
742 0.01
743 0.01
744 0.01
745 0.01
746 0.01
747 0.01
748 0.01
749 0.01
750 0.01
751 0.01
752 0.01
753 0.01
754 0.01
755 0.01
756 0.01
757 0.01
758 0.01
759 0.01
760 0.01
761 0.01
762 0.01
763 0.01
764 0.01
765 0.01
766 0.01
767 0.01
768 0.01
769 0.01
770 0.01
771 0.01
772 0.01
773 0.01
774 0.01
775 0.01
776 0.02
777 0.02
778 0.02
779 0.01
780 0.01
781 0.01
782 0.01
783 0.02
784 0.02
785 0.02
786 0.02
787 0.02
788 0.02
789 0.02
790 0.02
791 0.02
792 0.02
793 0.02
794 0.02
795 0.02
796 0.03
797 0.03
798 0.03
799 0.03
800 0.03
801 0.03
802 0.03
803 0.03
804 0.03
805 0.03
806 0.03
807 0.03
808 0.03
809 0.03
810 0.03
811 0.03
812 0.03
813 0.03
814 0.03
815 0.03
816 0.04
817 0.04
818 0.04
819 0.04
820 0.04
821 0.05
822 0.05
823 0.05
824 0.05
825 0.05
826 0.06
827 0.05
828 0.05
829 0.05
830 0.06
831 0.06
832 0.06
833 0.06
834 0.06
835 0.06
836 0.06
837 0.07
838 0.07
839 0.07
840 0.07
841 0.08
842 0.08
843 0.08
844 0.08
845 0.08
846 0.08
847 0.09
848 0.09
849 0.10
850 0.10
851 0.10
852 0.10
853 0.11
854 0.11
855 0.12
856 0.12
857 0.13
858 0.14
859 0.15
860 0.15
861 0.16
862 0.17
863 0.18
864 0.20
865 0.21
866 0.23
867 0.24
868 0.26
869 0.28
870 0.31
871 0.33
872 0.36
873 0.40
874 0.44
875 0.48
876 0.53
877 0.59
878 0.65
879 0.72
880 0.81
881 0.91
882 1.03
883 1.16
884 1.32
885 1.52
886 1.75
887 2.03
888 2.38
889 2.80
890 3.33
891 3.97
892 4.79
893 5.81
894 7.13
895 8.81
896 10.93
897 13.69
898 17.19
899 21.66
900 27.19
901 33.95
902 41.97
903 51.06
904 60.85
905 70.51
906 79.30
907 86.19
908 91.42
909 94.80
910 96.66
911 97.39
912 97.55
913 97.34
914 97.01
915 96.72
916 96.52
917 96.45
918 96.44
919 96.60
920 96.79
921 97.09
922 97.34
923 97.60
924 97.87
925 98.13
926 98.28
927 98.42
928 98.52
929 98.60
930 98.65
931 98.64
932 98.67
933 98.68
934 98.64
935 98.60
936 98.59
937 98.57
938 98.43
939 98.35
940 98.28
941 98.21
942 98.18
943 98.08
944 98.01
945 97.93
946 97.88
947 97.85
948 97.82
949 97.79
950 97.76
951 97.75
952 97.81
953 97.86
954 97.92
955 98.02
956 98.13
957 98.24
958 98.33
959 98.46
960 98.56
961 98.65
962 98.72
963 98.79
964 98.80
965 98.85
966 98.84
967 98.80
968 98.79
969 98.73
970 98.63
971 98.57
972 98.47
973 98.38
974 98.29
975 98.26
976 98.19
977 98.16
978 98.16
979 98.18
980 98.19
981 98.28
982 98.28
983 98.36
984 98.43
985 98.54
986 98.66
987 98.72
988 98.77
989 98.86
990 98.92
991 98.96
992 98.96
993 98.94
994 98.87
995 98.81
996 98.74
997 98.55
998 98.38
999 98.20
1000 98.01
1001 97.80
1002 97.56
1003 97.36
1004 97.14
1005 96.92
1006 96.74
1007 96.58
1008 96.46
1009 96.34
1010 96.23
1011 96.16
1012 96.14
1013 96.11
1014 96.13
1015 96.17
1016 96.27
1017 96.39
1018 96.53
1019 96.64
1020 96.81
1021 96.98
1022 97.17
1023 97.34
1024 97.47
1025 97.72
1026 97.86
1027 98.00
1028 98.14
1029 98.29
1030 98.39
1031 98.48
1032 98.57
1033 98.64
1034 98.70
1035 98.72
1036 98.78
1037 98.75
1038 98.74
1039 98.77
1040 98.76
1041 98.77
1042 98.76
1043 98.72
1044 98.76
1045 98.79
1046 98.77
1047 98.71
1048 98.72
1049 98.78
1050 98.75
1051 98.69
1052 98.67
1053 98.64
1054 98.64
1055 98.58
1056 98.53
1057 98.44
1058 98.37
1059 98.30
1060 98.13
1061 97.93
1062 97.86
1063 97.73
1064 97.46
1065 97.27
1066 97.05
1067 96.87
1068 96.67
1069 96.45
1070 96.20
1071 96.03
1072 95.76
1073 95.59
1074 95.47
1075 95.36
1076 95.15
1077 95.02
1078 94.97
1079 94.91
1080 94.86
1081 94.87
1082 94.91
1083 94.97
1084 95.10
1085 95.19
1086 95.27
1087 95.45
1088 95.69
1089 95.86
1090 95.94
1091 96.27
1092 96.48
1093 96.78
1094 96.95
1095 97.11
1096 97.37
1097 97.53
1098 97.69
1099 97.83
1100 97.92

Mounted Industrial Filter [IF]


MountThicknessID
CMT2mm1102123
CMT1mmID to be defined
SH 25.52mm1106996
SH 25.51mmOn request only
SH 27.02mm1104059
SH 27.01mmOn request only
SN1 30.52mm1097450
SN1 30.51mmOn request only
SH 34.02mm1106997
SH 34.01mmOn request only
SH 35.52mm1100738
SH 35.51mmOn request only
SH 37.02mm1100820
SH 37.01mmOn request only
SH 39.02mm1106998
SH 40.52mm1093922
SH 43.02mm1106999
SH 46.02mm1107000
SH 49.02mm1107001

Order nomenclature
IF LP 900 HT [Mount] [Thickness]
Example: IF LP 900 HT SH 25.5 2
 

Unmounted Industrial Filterglass [IFG]


DiameterThicknessID
22.0 mm2mmID to be defined
22.0 mm1mmID to be defined
23.0 mm2mmID to be defined
23.0 mm1mmOn request only
24.0 mm2mm1098603
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 mm2mm1088895
34.0 mm1mm1106563
36.0 mm2mmID to be defined
38.0 mm2mmID to be defined
40.0 mm2mmID to be defined
43.0 mm2mm1088896
46.0 mm2mmID to be defined

Order nomenclature
IFG LP 900 HT [Diameter] [Thickness]
Example: IFG LP 900 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



 

More Longpass Filters


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

 

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