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LP 725 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 725 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 725 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 725 HT Longpass Filter

TypeOn request
Characteristicsinterference
Angle of indcident0° +/- 8°
Cut-on wavelength725 +/- 8 nm
Transmittance750 - 1050 nm: Tabs > 90%
750 - 1050 nm: Tave > 95%
Blocking< 670 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 Longpass Filter LP 725 HT



Transmission of the LP 725 HT Filter


 

Transmission Data

 

Download Excel

Wavelength (nm) Transmission (%)
350 0.01
351 0.01
352 0.01
353 0.02
354 0.04
355 0.04
356 0.03
357 0.03
358 0.03
359 0.03
360 0.02
361 0.02
362 0.01
363 0.01
364 0.02
365 0.02
366 0.02
367 0.01
368 0.01
369 0.01
370 0.02
371 0.02
372 0.01
373 0.01
374 0.00
375 0.00
376 0.00
377 0.01
378 0.01
379 0.00
380 0.01
381 0.02
382 0.02
383 0.01
384 0.01
385 0.01
386 0.01
387 0.03
388 0.03
389 0.02
390 0.01
391 0.00
392 0.00
393 0.00
394 0.01
395 0.00
396 0.01
397 0.03
398 0.05
399 0.04
400 0.01
401 0.01
402 0.01
403 0.00
404 0.01
405 0.01
406 0.03
407 0.05
408 0.05
409 0.02
410 0.01
411 0.01
412 0.01
413 0.01
414 0.01
415 0.01
416 0.03
417 0.05
418 0.05
419 0.02
420 0.01
421 0.01
422 0.01
423 0.01
424 0.01
425 0.03
426 0.05
427 0.06
428 0.05
429 0.02
430 0.01
431 0.01
432 0.01
433 0.01
434 0.01
435 0.00
436 0.00
437 0.01
438 0.01
439 0.02
440 0.03
441 0.03
442 0.02
443 0.01
444 0.01
445 0.01
446 0.01
447 0.01
448 0.01
449 0.01
450 0.01
451 0.01
452 0.01
453 0.01
454 0.01
455 0.01
456 0.01
457 0.01
458 0.01
459 0.01
460 0.01
461 0.01
462 0.01
463 0.01
464 0.01
465 0.01
466 0.00
467 0.00
468 0.00
469 0.00
470 0.00
471 0.00
472 0.00
473 0.00
474 0.00
475 0.00
476 0.00
477 0.00
478 0.00
479 0.01
480 0.01
481 0.01
482 0.01
483 0.02
484 0.01
485 0.01
486 0.01
487 0.01
488 0.01
489 0.01
490 0.01
491 0.01
492 0.01
493 0.01
494 0.01
495 0.01
496 0.01
497 0.01
498 0.01
499 0.01
500 0.01
501 0.02
502 0.02
503 0.02
504 0.03
505 0.04
506 0.06
507 0.06
508 0.06
509 0.05
510 0.03
511 0.02
512 0.01
513 0.01
514 0.01
515 0.01
516 0.01
517 0.00
518 0.00
519 0.00
520 0.00
521 0.01
522 0.00
523 0.00
524 0.00
525 0.00
526 0.00
527 0.00
528 0.01
529 0.01
530 0.01
531 0.02
532 0.03
533 0.06
534 0.09
535 0.08
536 0.05
537 0.02
538 0.01
539 0.01
540 0.00
541 0.00
542 0.00
543 0.00
544 0.00
545 0.00
546 0.00
547 0.00
548 0.00
549 0.00
550 0.00
551 0.00
552 0.00
553 0.00
554 0.00
555 0.00
556 0.00
557 0.00
558 0.00
559 0.00
560 0.01
561 0.01
562 0.01
563 0.01
564 0.01
565 0.01
566 0.01
567 0.01
568 0.01
569 0.01
570 0.01
571 0.01
572 0.01
573 0.01
574 0.01
575 0.01
576 0.01
577 0.01
578 0.01
579 0.01
580 0.01
581 0.01
582 0.01
583 0.02
584 0.02
585 0.02
586 0.02
587 0.02
588 0.02
589 0.02
590 0.01
591 0.01
592 0.01
593 0.01
594 0.01
595 0.01
596 0.01
597 0.01
598 0.01
599 0.01
600 0.01
601 0.01
602 0.01
603 0.01
604 0.01
605 0.01
606 0.01
607 0.01
608 0.02
609 0.02
610 0.02
611 0.02
612 0.02
613 0.03
614 0.03
615 0.03
616 0.03
617 0.04
618 0.04
619 0.04
620 0.04
621 0.04
622 0.04
623 0.05
624 0.05
625 0.05
626 0.05
627 0.05
628 0.04
629 0.05
630 0.05
631 0.05
632 0.05
633 0.05
634 0.05
635 0.05
636 0.05
637 0.05
638 0.05
639 0.05
640 0.06
641 0.06
642 0.06
643 0.06
644 0.06
645 0.07
646 0.07
647 0.07
648 0.07
649 0.08
650 0.08
651 0.08
652 0.09
653 0.09
654 0.09
655 0.10
656 0.10
657 0.11
658 0.11
659 0.12
660 0.12
661 0.13
662 0.14
663 0.15
664 0.16
665 0.17
666 0.19
667 0.20
668 0.22
669 0.24
670 0.26
671 0.29
672 0.32
673 0.35
674 0.39
675 0.43
676 0.47
677 0.52
678 0.58
679 0.64
680 0.71
681 0.78
682 0.85
683 0.93
684 1.01
685 1.15
686 1.24
687 1.32
688 1.40
689 1.48
690 1.56
691 1.65
692 1.74
693 1.83
694 1.93
695 2.04
696 2.16
697 2.30
698 2.45
699 2.61
700 2.81
701 3.02
702 3.27
703 3.57
704 3.90
705 4.28
706 4.72
707 5.23
708 5.82
709 6.52
710 7.31
711 8.25
712 9.33
713 10.61
714 12.08
715 13.82
716 15.82
717 18.17
718 20.79
719 23.82
720 27.17
721 31.00
722 35.17
723 39.75
724 44.60
725 49.74
726 54.90
727 60.13
728 65.17
729 70.00
730 74.59
731 78.78
732 82.54
733 85.86
734 88.74
735 91.22
736 93.25
737 94.93
738 96.29
739 97.35
740 98.18
741 98.74
742 99.18
743 99.41
744 99.53
745 99.55
746 99.50
747 99.40
748 99.29
749 99.14
750 98.93
751 98.79
752 98.61
753 98.54
754 98.43
755 98.40
756 98.32
757 98.29
758 98.36
759 98.41
760 98.39
761 98.50
762 98.59
763 98.71
764 98.79
765 98.94
766 99.02
767 99.08
768 99.14
769 99.27
770 99.29
771 99.37
772 99.36
773 99.44
774 99.43
775 99.46
776 99.42
777 99.48
778 99.48
779 99.55
780 99.49
781 99.52
782 99.47
783 99.47
784 99.51
785 99.48
786 99.53
787 99.47
788 99.44
789 99.48
790 99.45
791 99.42
792 99.37
793 99.40
794 99.32
795 99.29
796 99.28
797 99.18
798 99.15
799 99.08
800 99.02
801 98.92
802 98.87
803 98.78
804 98.70
805 98.67
806 98.59
807 98.56
808 98.52
809 98.48
810 98.45
811 98.49
812 98.49
813 98.54
814 98.53
815 98.59
816 98.63
817 98.70
818 98.74
819 98.81
820 98.88
821 99.00
822 99.01
823 99.10
824 99.14
825 99.21
826 99.26
827 99.33
828 99.37
829 99.42
830 99.42
831 99.43
832 99.42
833 99.43
834 99.46
835 99.47
836 99.43
837 99.43
838 99.40
839 99.38
840 99.36
841 99.32
842 99.31
843 99.32
844 99.33
845 99.29
846 99.31
847 99.28
848 99.31
849 99.32
850 99.34
851 99.36
852 99.40
853 99.39
854 99.46
855 99.43
856 99.48
857 99.46
858 99.46
859 99.44
860 99.43
861 99.42
862 99.39
863 99.34
864 99.31
865 99.23
866 99.15
867 99.11
868 98.99
869 98.92
870 98.76
871 98.70
872 98.53
873 98.41
874 98.31
875 98.12
876 98.04
877 97.90
878 97.73
879 97.61
880 97.52
881 97.41
882 97.29
883 97.18
884 97.11
885 97.02
886 96.98
887 96.87
888 96.92
889 96.85
890 96.88
891 96.85
892 96.95
893 96.92
894 97.01
895 97.02
896 97.18
897 97.20
898 97.33
899 97.36
900 97.47
901 97.57
902 97.75
903 97.80
904 97.89
905 97.92
906 98.10
907 98.14
908 98.30
909 98.28
910 98.40
911 98.43
912 98.47
913 98.48
914 98.55
915 98.61
916 98.63
917 98.56
918 98.55
919 98.58
920 98.53
921 98.55
922 98.55
923 98.47
924 98.38
925 98.38
926 98.38
927 98.31
928 98.22
929 98.23
930 98.21
931 98.17
932 98.12
933 98.19
934 98.17
935 98.12
936 98.14
937 98.17
938 98.15
939 98.19
940 98.23
941 98.28
942 98.39
943 98.34
944 98.41
945 98.52
946 98.62
947 98.59
948 98.76
949 98.75
950 98.85
951 98.92
952 98.98
953 99.03
954 99.13
955 99.13
956 99.22
957 99.23
958 99.33
959 99.33
960 99.38
961 99.37
962 99.43
963 99.40
964 99.36
965 99.30
966 99.29
967 99.34
968 99.29
969 99.19
970 99.18
971 99.09
972 99.04
973 99.01
974 98.94
975 98.86
976 98.79
977 98.67
978 98.60
979 98.58
980 98.46
981 98.43
982 98.34
983 98.32
984 98.26
985 98.25
986 98.16
987 98.17
988 98.09
989 98.12
990 98.05
991 98.07
992 98.12
993 98.14
994 98.11
995 98.17
996 98.19
997 98.25
998 98.25
999 98.28
1000 98.32
1001 98.40
1002 98.48
1003 98.49
1004 98.53
1005 98.59
1006 98.62
1007 98.67
1008 98.64
1009 98.71
1010 98.71
1011 98.76
1012 98.73
1013 98.76
1014 98.70
1015 98.70
1016 98.65
1017 98.60
1018 98.52
1019 98.50
1020 98.38
1021 98.36
1022 98.17
1023 98.11
1024 97.90
1025 97.83
1026 97.67
1027 97.57
1028 97.35
1029 97.29
1030 97.10
1031 96.95
1032 96.68
1033 96.51
1034 96.35
1035 96.18
1036 95.95
1037 95.88
1038 95.63
1039 95.51
1040 95.30
1041 95.21
1042 95.09
1043 94.94
1044 94.73
1045 94.64
1046 94.54
1047 94.42
1048 94.37
1049 94.26
1050 94.20
1051 94.16
1052 94.09
1053 94.09
1054 94.00
1055 94.01
1056 94.06
1057 94.01
1058 94.10
1059 94.09
1060 94.15
1061 94.16
1062 94.29
1063 94.32
1064 94.41
1065 94.41
1066 94.54
1067 94.68
1068 94.76
1069 94.82
1070 94.97
1071 95.03
1072 95.14
1073 95.22
1074 95.33
1075 95.36
1076 95.47
1077 95.54
1078 95.62
1079 95.59
1080 95.69
1081 95.72
1082 95.80
1083 95.76
1084 95.77
1085 95.74
1086 95.75
1087 95.75
1088 95.66
1089 95.65
1090 95.60
1091 95.49
1092 95.44
1093 95.29
1094 95.20
1095 95.04
1096 94.99
1097 94.76
1098 94.59
1099 94.39
1100 94.33

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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