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LP 495 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 495 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 495 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.

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Technical specifications: LP 495 HT Longpass Filter

TypeOn request
Characteristicsinterference
Angle of indcident0° +/- 8°
Cut-on wavelength495 +/- 5nm
Transmittance515 - 900 nm: Tabs > 90%
515 - 900 nm: Tave > 95%
Blocking< 450 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 495 HT



Transmission of the LP 495 HT Filter


 

Transmission Data

 

Download Excel

Wavelength (nm) Transmission (%)
350 0.07
351 0.07
352 0.10
353 0.08
354 0.05
355 0.04
356 0.04
357 0.03
358 0.03
359 0.02
360 0.05
361 0.05
362 0.03
363 0.03
364 0.03
365 0.05
366 0.07
367 0.06
368 0.04
369 0.05
370 0.05
371 0.03
372 0.02
373 0.02
374 0.02
375 0.02
376 0.02
377 0.05
378 0.07
379 0.04
380 0.02
381 0.03
382 0.04
383 0.02
384 0.05
385 0.16
386 0.18
387 0.17
388 0.17
389 0.16
390 0.16
391 0.16
392 0.16
393 0.16
394 0.16
395 0.15
396 0.15
397 0.14
398 0.14
399 0.14
400 0.14
401 0.14
402 0.14
403 0.13
404 0.13
405 0.13
406 0.13
407 0.13
408 0.13
409 0.13
410 0.13
411 0.12
412 0.12
413 0.11
414 0.11
415 0.11
416 0.11
417 0.11
418 0.11
419 0.11
420 0.10
421 0.10
422 0.08
423 0.09
424 0.09
425 0.10
426 0.10
427 0.09
428 0.09
429 0.09
430 0.08
431 0.08
432 0.08
433 0.09
434 0.10
435 0.09
436 0.09
437 0.08
438 0.08
439 0.09
440 0.08
441 0.10
442 0.11
443 0.10
444 0.10
445 0.11
446 0.13
447 0.14
448 0.17
449 0.19
450 0.21
451 0.23
452 0.26
453 0.29
454 0.33
455 0.36
456 0.40
457 0.44
458 0.47
459 0.50
460 0.53
461 0.57
462 0.60
463 0.64
464 0.69
465 0.74
466 0.80
467 0.85
468 0.93
469 1.01
470 1.11
471 1.22
472 1.35
473 1.51
474 1.69
475 1.90
476 2.15
477 2.45
478 2.81
479 3.25
480 3.76
481 4.41
482 5.16
483 6.11
484 7.24
485 8.67
486 10.37
487 12.51
488 15.06
489 18.21
490 21.96
491 26.58
492 31.82
493 37.91
494 44.67
495 52.13
496 59.58
497 67.00
498 73.90
499 80.00
500 85.12
501 89.23
502 92.26
503 94.40
504 95.78
505 96.63
506 97.07
507 97.26
508 97.31
509 97.22
510 97.12
511 96.96
512 96.86
513 96.77
514 96.68
515 96.62
516 96.60
517 96.56
518 96.53
519 96.50
520 96.51
521 96.53
522 96.55
523 96.54
524 96.58
525 96.61
526 96.65
527 96.65
528 96.70
529 96.73
530 96.81
531 96.83
532 96.87
533 96.89
534 96.92
535 96.92
536 96.96
537 96.96
538 96.94
539 96.90
540 96.90
541 96.87
542 96.83
543 96.77
544 96.70
545 96.64
546 96.58
547 96.51
548 96.45
549 96.37
550 96.32
551 96.24
552 96.20
553 96.16
554 96.12
555 96.10
556 96.10
557 96.10
558 96.07
559 96.09
560 96.14
561 96.15
562 96.21
563 96.22
564 96.28
565 96.32
566 96.36
567 96.39
568 96.46
569 96.49
570 96.51
571 96.53
572 96.59
573 96.60
574 96.57
575 96.61
576 96.57
577 96.57
578 96.50
579 96.56
580 96.48
581 96.50
582 96.41
583 96.41
584 96.33
585 96.32
586 96.25
587 96.25
588 96.19
589 96.18
590 96.15
591 96.13
592 96.14
593 96.12
594 96.11
595 96.12
596 96.14
597 96.19
598 96.19
599 96.22
600 96.26
601 96.31
602 96.35
603 96.39
604 96.48
605 96.52
606 96.57
607 96.64
608 96.72
609 96.79
610 96.84
611 96.90
612 96.96
613 97.05
614 97.09
615 97.14
616 97.21
617 97.26
618 97.28
619 97.37
620 97.44
621 97.46
622 97.49
623 97.55
624 97.59
625 97.62
626 97.65
627 97.68
628 97.69
629 97.73
630 97.76
631 97.79
632 97.82
633 97.85
634 97.86
635 97.88
636 97.90
637 97.93
638 97.96
639 97.98
640 97.97
641 98.00
642 98.00
643 98.06
644 98.07
645 98.09
646 98.11
647 98.14
648 98.12
649 98.14
650 98.14
651 98.15
652 98.13
653 98.16
654 98.13
655 98.14
656 98.13
657 98.10
658 98.05
659 98.06
660 98.03
661 97.98
662 97.94
663 97.91
664 97.86
665 97.81
666 97.75
667 97.71
668 97.63
669 97.60
670 97.52
671 97.49
672 97.39
673 97.31
674 97.28
675 97.18
676 97.13
677 97.08
678 97.02
679 96.94
680 96.90
681 96.88
682 96.78
683 96.73
684 96.70
685 96.67
686 96.65
687 96.59
688 96.58
689 96.55
690 96.52
691 96.50
692 96.49
693 96.48
694 96.49
695 96.50
696 96.50
697 96.52
698 96.55
699 96.58
700 96.61
701 96.64
702 96.66
703 96.70
704 96.76
705 96.78
706 96.83
707 96.87
708 96.91
709 96.99
710 97.04
711 97.07
712 97.11
713 97.16
714 97.21
715 97.24
716 97.28
717 97.30
718 97.33
719 97.36
720 97.38
721 97.41
722 97.42
723 97.45
724 97.46
725 97.46
726 97.46
727 97.45
728 97.46
729 97.44
730 97.41
731 97.38
732 97.37
733 97.34
734 97.31
735 97.30
736 97.26
737 97.21
738 97.19
739 97.14
740 97.08
741 97.03
742 97.01
743 96.95
744 96.91
745 96.86
746 96.82
747 96.76
748 96.71
749 96.68
750 96.63
751 96.57
752 96.54
753 96.50
754 96.49
755 96.43
756 96.39
757 96.38
758 96.37
759 96.32
760 96.34
761 96.31
762 96.32
763 96.30
764 96.29
765 96.31
766 96.31
767 96.33
768 96.33
769 96.34
770 96.36
771 96.38
772 96.41
773 96.44
774 96.48
775 96.50
776 96.54
777 96.59
778 96.60
779 96.64
780 96.69
781 96.75
782 96.78
783 96.84
784 96.87
785 96.91
786 96.96
787 97.03
788 97.03
789 97.10
790 97.13
791 97.20
792 97.22
793 97.27
794 97.31
795 97.34
796 97.41
797 97.41
798 97.43
799 97.45
800 97.47
801 97.48
802 97.53
803 97.54
804 97.56
805 97.52
806 97.55
807 97.53
808 97.54
809 97.52
810 97.51
811 97.52
812 97.50
813 97.49
814 97.45
815 97.45
816 97.41
817 97.39
818 97.35
819 97.30
820 97.28
821 97.24
822 97.23
823 97.18
824 97.15
825 97.13
826 97.07
827 97.02
828 97.00
829 96.96
830 96.91
831 96.88
832 96.84
833 96.80
834 96.79
835 96.75
836 96.71
837 96.66
838 96.61
839 96.60
840 96.57
841 96.55
842 96.55
843 96.51
844 96.51
845 96.50
846 96.49
847 96.46
848 96.44
849 96.43
850 96.44
851 96.45
852 96.45
853 96.45
854 96.46
855 96.48
856 96.48
857 96.51
858 96.52
859 96.53
860 96.56
861 96.60
862 96.61
863 96.67
864 96.67
865 96.69
866 96.76
867 96.75
868 96.80
869 96.85
870 96.86
871 96.92
872 96.95
873 96.99
874 97.04
875 97.09
876 97.10
877 97.14
878 97.19
879 97.20
880 97.27
881 97.29
882 97.33
883 97.34
884 97.34
885 97.37
886 97.43
887 97.40
888 97.45
889 97.42
890 97.47
891 97.45
892 97.50
893 97.45
894 97.51
895 97.43
896 97.49
897 97.44
898 97.46
899 97.34
900 97.39
901 97.33
902 97.31
903 97.24
904 97.24
905 97.15
906 97.12
907 97.03
908 96.95
909 96.92
910 96.85
911 96.75
912 96.69
913 96.62
914 96.53
915 96.42
916 96.35
917 96.24
918 96.14
919 96.07
920 95.92
921 95.79
922 95.70
923 95.59
924 95.47
925 95.37
926 95.24
927 95.10
928 95.00
929 94.89
930 94.73
931 94.60
932 94.51
933 94.36
934 94.25
935 94.11
936 94.01
937 93.86
938 93.72
939 93.61
940 93.47
941 93.33
942 93.23
943 93.12
944 93.03
945 92.87
946 92.77
947 92.63
948 92.55
949 92.42
950 92.32
951 92.18
952 92.11
953 91.99
954 91.92
955 91.78
956 91.73
957 91.61
958 91.57
959 91.43
960 91.38
961 91.32
962 91.24
963 91.13
964 91.10
965 91.03
966 91.00
967 90.92
968 90.85
969 90.79
970 90.78
971 90.69
972 90.70
973 90.66
974 90.64
975 90.59
976 90.56
977 90.52
978 90.51
979 90.48
980 90.51
981 90.50
982 90.50
983 90.49
984 90.49
985 90.50
986 90.53
987 90.53
988 90.51
989 90.56
990 90.58
991 90.61
992 90.62
993 90.67
994 90.71
995 90.72
996 90.74
997 90.79
998 90.84
999 90.92
1000 90.91
1001 90.97
1002 91.00
1003 91.05
1004 91.05
1005 91.16
1006 91.18
1007 91.26
1008 91.25
1009 91.29
1010 91.33
1011 91.44
1012 91.44
1013 91.52
1014 91.54
1015 91.60
1016 91.63
1017 91.71
1018 91.71
1019 91.77
1020 91.80
1021 91.88
1022 91.89
1023 91.92
1024 91.94
1025 92.01
1026 92.00
1027 92.08
1028 92.06
1029 92.09
1030 92.11
1031 92.15
1032 92.15
1033 92.14
1034 92.13
1035 92.18
1036 92.21
1037 92.23
1038 92.14
1039 92.17
1040 92.15
1041 92.16
1042 92.14
1043 92.13
1044 92.11
1045 92.09
1046 92.05
1047 91.99
1048 91.99
1049 91.94
1050 91.94
1051 91.85
1052 91.80
1053 91.77
1054 91.72
1055 91.65
1056 91.61
1057 91.51
1058 91.46
1059 91.38
1060 91.35
1061 91.24
1062 91.15
1063 91.02
1064 91.01
1065 90.89
1066 90.77
1067 90.66
1068 90.60
1069 90.47
1070 90.39
1071 90.33
1072 90.24
1073 90.07
1074 90.01
1075 89.87
1076 89.79
1077 89.66
1078 89.57
1079 89.43
1080 89.33
1081 89.20
1082 89.11
1083 88.96
1084 88.85
1085 88.67
1086 88.60
1087 88.46
1088 88.33
1089 88.22
1090 88.09
1091 87.92
1092 87.83
1093 87.69
1094 87.56
1095 87.47
1096 87.36
1097 87.21
1098 87.07
1099 86.97
1100 86.84

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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+49 (0) 671 601 0

 

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