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MidOpt LP Series Filter LP665

Uniforce Product

Salient Features

Dark Red Longpass Filter

Used often with monochrome cameras to aid in increased contrast and resolution in the near-IR, LP665 filters will block most visible light while passing deep red and all NIR wavelengths. To block longer infrared wavelengths, see our BP695 Bandpass filter.

LP665 Dark Red Longpass Filter MidOpt_LP665_Trans_Graphic

  • Useful Range : 680-1100nm
  • Cut-on Wavelength 50% T : 665nm
  • Tolerance : +/- 10nm
  • Minimum Peak Transmission :: ≥90%
  • Surface Quality : 40/20

The performance of a filter is based on what happens to light passing through the filter. The apparent color of light reflected off the surface is not a reliable way to judge the filter’s capabilities. Batch-to-batch difference in the apparent color of the coatings or filter substrates can often be easily seen when looking at two examples of the same filter type. The color of the coating does not indicate a disparity in performance.

Transmission DataStablEdgeAvailable MountsLearn MoreQuote Request

LP665 Transmission Data

wavelength transmission wavelength transmission
(nm) (%) (nm) (%)
1100 73.03 720 94.52
1090 73.28 710 94.55
1080 73.59 700 93.69
1070 73.92 690 90.54
1060 74.26 680 81.55
1050 74.61 670 58.56
1040 75 660 29.24
1030 75.39 650 5.79
1020 75.81 640 0.6
1010 76.25 630 0.11
1000 76.7 620 0.04
990 77.16 610 0.02
980 77.66 600 0.01
970 78.16 590 0
960 78.68 580 0
950 79.15 570 0
940 79.7 560 0
930 80.26 550 0
920 80.84 540 0
910 81.45 530 0
900 82.07 520 0
890 82.71 510 0
880 83.37 500 0
870 84.06 490 0
860 84.76 480 0
850 85.6 470 0
840 86.42 460 0
830 87.29 450 0
820 87.84 440 0
810 88.72 430 0
800 89.44 420 0
790 90.02 410 0
780 90.87 400 0
770 91.58 390 0
760 92.31 380 0
750 92.93 370 0
740 93.64 360 0
730 94 350 0

midopt_stabledge-filter-ex

Click Pic to Enlarge

MidOpt StablEDGE™ optical filters are specifically designed to be less  susceptible to effects from angular shifting seen when optical filters are placed in front of short focal length (<12 mm) camera lenses.
StablEDGE™ filters take advantage of absorptive filter glass to form the leading
edge of the filter passband.This assures no shifting in this region, even when the
lens FOV exceeds 100°.StablEDGE™ designs are  less angle-of-incidence sensitive, inherently more rugged, and are environmentally stable.

midopt_stableEdge_logo

Available Mounts

Threaded Mount

  • Designed for lenses with filter threads, a variety of filter types and stock threaded sizes are available: M13.25-M105
  • Larger sizes, 62mm to 105mm, are made to order and are not returnable
  • Custom thread sizes are available upon request.
  • Threaded mounts are available as black anodized aluminum rings. Rotating mounts with locking thumb screws are generally provided.

Ordering Example:

  • Filter: BP470
  • Mount Size: M27

Correct Part# is:

  • BP470-27

Threaded Mount Technical Drawing PDF

Slip Mount

  • Designed for varifocal lenses, wide angle lenses and lenses without filter threads
  • Accommodates standard threaded mounts
  • Low profile and oversize diameter design prevents wide angle lens vignetting
  • Locking set screws and a wrench are provided to secure the adapter to the lens
  • Many varifocal and shorter fixed focal length (wide angle) lenses are not supplied with filter threads due to the presence of a protruding, strongly convex lens element. Our slip mount adapters allow standard threaded filters to be fitted securely to these and a large variety of lenses that do not have filter threads provided.

Ordering Example:

  • Filter: BP470
  • Outside Diameter of Lens in mm: 43mm

Correct Part# is:

  • BP470-S43

Slip Mount Technical Drawing PDF

C/CS Camera Mount

midopt-c-mount

  • Designed to thread directly into any C/CS mount camera between the lens and sensor
  • Wrenching slots aid in threading the filter into the camera body. A wrench is supplied with each filter.
  • Helpful in applications with space constraints
  • Can be used with wide angle lenses that do not accept filters at the front end to prevent vignetting
  • C/CS mount filters are available in a standard 1mm thickness

Ordering Example: 

  • Filter: BP470
  • Mount Size: 25.4

Correct Part# is:

  • BP470-25.4

C/CS Camera Mount Technical Drawing PDF

 Unmounted  & Custom Size

midopt-unmounted

  • Any MidOpt filter type can be provided as an Unmounted filter
  • Custom shapes and sizes are typically fabricated with one day to two week lead times
  • Custom filter types with longer lead times can also be quoted. Please contact us regarding feasibility.

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