BP500
Green-Blue Bandpass Filter

Blue-green bandpass filters have typically been recommended for use inside cameras to block infrared and most red light.

The single substrate, hard-coated BP500 is an absorptive color glass filter that does not employ coatings for additional blocking. MidOpt does not recommend this filter for any machine vision application, however many competitiors offer this as a standard blue-green bandpass filter. It generally blocks red and near-IR wavelengths. Because we often hear from customers that will consider using only this type of filter, we supply it to those who insist upon having it.

For most blue-green LED applications, MidOpt recommends our BP525 Green Bandpass Filter or SP585 Cyan Dichroic Shortpass Filter over the BP500. In particular, the BP525 has a higher peak transmission (>90% vs. just 86% in the case of the BP500), a more compact yet broad peak, complete blocking of UV and IR wavelengths, and much steeper cut on and cut off slopes. All of this translates into far brighter, much higher contrast images when using a BP525 filter instead of a BP500 filter.

Download Excel Spreadsheet with data and curve for this filter.

Examples of filter effectiveness.

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 365-570nm
Absorbs 580nm and above

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
850
840
830
820
810

800
790
780
770
760
750
740
730
720
710

700
690
680
670
660

0.02
0.02
0.02
0.01
0.01
0.00
0.00
0.00
0.00
0.00

0.00
0.00
0.00
0.00
0.00
0.00
0.00
0.00
0.00
0.00

0.00
0.00
0.00
0.00
0.00
0.00
0.00
0.00
0.00
0.00

0.00
0.00
0.00
0.00
0.00
0.00
0.00
0.00
0.00
0.00

0.00
0.00
0.00
0.04
0.14

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

0.46
1.25
2.91
6.05
11.38
19.00
28.94
40.27
51.94
62.17

71.04
77.44
82.23
84.75
86.19
86.72
86.71
86.25
85.54
84.51

83.61
82.03
80.40
78.68
76.43
73.85
70.59
66.81
61.83
52.61

40.10
30.26
19.88
4.57
0.32
0.09
0.02
0.00
0.00
0.00

0.00
0.00
0.00
0.00
0.00