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MidOpt SP Series – NIR Block Filter SP650

Uniforce Product

Salient Features

Near-IR/Mid-Red Dichroic Block Shortpass Filter

SP650 Near-IR/Mid-Red Dichroic Block Shortpass FilterMidOpt_SP650_Trans_Graphic

  • Useful Range : 400-640nm
  • Cut-off Wavelength 50% T : 650nm
  • 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 DataAvailable MountsQuote Request

SP650 Transmission Data

wavelength transmission wavelength transmission
(nm) (%) (nm) (%)
1100 68.41 700 1.12
1090 66.06 690 2.25
1080 57.64 680 4.75
1070 31.34 670 7.53
1060 11.82 660 15.2
1050 4.63 650 46.88
1040 2.15 640 78.79
1030 1.2 630 95.13
1020 0.78 620 90.45
1010 0.62 610 91.99
1000 0.63 600 90.43
990 0.72 590 93.84
980 0.96 580 95.48
970 0.97 570 97.29
960 0.57 560 94.9
950 0.24 550 97.95
940 0.11 540 98.03
930 0.09 530 94.87
920 0.14 520 97.07
910 0.13 510 96.6
900 0.15 500 96.48
890 0.43 490 96.54
880 1.35 480 93.48
870 1.25 470 94.07
860 0.55 460 95.75
850 0.42 450 94.5
840 0.61 440 95.86
830 2.25 430 94.39
820 3.32 420 94.56
810 0.85 410 93.71
800 0.45 400 86.54
790 0.5 390 74.46
780 0.97 380 65.51
770 1.28 370 83.91
760 0.72 360 81.17
750 0.49 350 37.61
740 0.64 340 0.37
730 1.33 330 0.12
720 1.54 320 2.43
710 1.02 310 0.39
300 0.01

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.

Order MidOpt SP Series Filter SP650

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