SP700 Extended
Hot Mirror/NIR Dichroic
Blocking Filter

The single substrate, hard-coated SP700 is the filter normally recommended for broad visible wavelength transmission and complete infrared blocking over the sensitivity range of all monochrome cameras. In fact, near-IR blocking extends much farther – to 1550nm and beyond.

SP700 is excellent when used as a heat-rejection filter. The substrate material is Borofloat, a low-expansion glass similar to Pyrex. This material comes in various thicknesses and is supplied with a multi-layer, visible-optimized, anti-reflection coating on the rear surface of the filter to improve transmission and eliminate glare.

The infrared spectrum is usually defined as starting at 700nm.
Depending on the spectral response of any given camera, some camera manufacturers feel they achieve much better color balance when they are able to truly block ALL of the IR. Some of the deep red portion of the visible spectrum is also affected, but significantly less when compared to the SP675. IR blocking over the 720-1075nm range is better than or equivalent to that of any standard IR blocking filter in use by most camera manufacturers.

The SP700 continues its IR blocking capability out to 1550nm. This truly is an "extended hot mirror" that most filter manufacturers will not offer for camera applications, as your camera's sensor usually has no sensitivity in this extended range.

Example:

(left) Straight digital color image.
(right) True visible color is achieved by eliminating the UV and IR wavelengths.

Certain machine vision filters can also be used to block the bright glow of hot metals, glass and other material. Shortpass filters allow light up to a specific wavelength to pass through while blocking all light at higher wavelengths. This useful feature permits, for example, the viewing of hot rolled steel to see certain temperature areas while not blinding the system from the brighter, hotter areas.

See SP510, SP570, SP585, SP625, SP645, SP700 and SP730

More examples

Download Excel Spreadsheet with data and curve for this filter.

Standard Threaded Mounts:
We offer standard filter sizes from stock – 22.5mm to 62mm – for same- or next-day shipping. Larger filters – 67mm to 105mm – are made to order and are normally not returnable.

Click here for PDF drawing of standard mounts

Slip Mounts:
If your lens does not have threads for mounting a filter, Slip Mount adapters are available. Slip Mounts can attach a regular filter to a lens or attach a very large filter to accommodate a wide angle lens. Please call to order Slip Mount adapters.

C-Mounts:
3mm thick threaded mount for adding a filter between lens and camera
Click here for PDF drawing of c-mounts

Transmission chart (typical)
Passes 410-690nm
Reflects 350-400nm and 710-1550nm

1500
1490
1480
1470
1460
1450
1440
1430
1420
1410

1400
1390
1380
1370
1360
1350
1340
1330
1320
1310

1300
1290
1280
1270
1260
1250
1240
1230
1220
1210

1200
1190
1180
1170
1160
1150
1140
1130
1120
1110

1100
1090
1080
1070
1060
1050
1040
1030
1020
1010

1000
990
980
970
960
950
940
930
920
910

900
890
880
870
860

4.72
3.76
3.36
3.38
3.80
4.58
5.55
6.20
6.25
6.14

6.21
6.13
5.11
3.48
2.31
1.72
1.51
1.60
2.05
3.09

4.54
4.66
3.73
3.17
3.14
3.44
3.80
3.94
3.88
3.69

3.51
3.53
3.71
3.39
2.55
2.01
2.07
2.80
3.80
3.26

1.67
0.64
0.30
0.21
0.19
0.29
0.86
2.61
1.76
1.07

0.44
0.30
0.52
2.27
0.56
0.45
1.18
0.73
0.44
0.30

0.21
0.52
0.22
0.08
0.07

850
840
830
820
810

800
790
780
770
760
750
740
730
720
710

700
690
680
670
660
650
640
630
620
610

600
590
580
570
560
550
540
530
520
510

500
490
480
470
460
450
440
430
420
410

400
390
380
370
360
350
340
330
320
310

300
290
280
270
260
250
240
230
220
210

0.15
0.23
0.11
0.10
0.18

0.20
0.10
1.57
0.17
0.21
0.47
1.22
2.22
2.17
39.44

81.48
93.16
93.47
92.24
94.47
95.01
94.25
94.67
94.77
94.52

93.98
93.01
92.43
93.66
92.40
92.37
93.29
93.52
89.60
93.12

90.90
91.79
89.90
91.25
91.41
90.76
89.46
89.50
86.46
84.14

6.85
2.15
0.26
0.76
0.05
0.18
0.33
0.00
0.26
0.22

0.23
0.00
0.00
0.12
0.00
0.00
0.00
0.00
0.00
0.00