BP525
Green Bandpass Filter

Recommended for use with green LEDs and fluorescence imaging

BP525 filters have been designed for use in almost all green LED or laser diode applications. These single substrate, hard-coated filters also have wide application in UV fluroescence imaging of various commonly used stains and plastic materials that fluoresce in the green portion of the spectrum.

MidOpt strongly recommends our single substrate, hard-coated BP525 over all other widely offered green bandpass filters because of its broad passband, far higher peak transmission, far superior blocking of UV and IR wavelengths, and reduced sensitivity to angle of incidence changes. Compared to any other “green” filters offered for industrial imaging, the BP525 will nearly always result in significantly brighter and higher contrast images.

Example:

(left) Monochrome image with white light.
(center) Commonly used photographic filter doesn't help at all.
(right) The BP525 clearly brings out the details and improves subject recognition.

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 495-565nm
Absorbs UV and blue
Reflects 570-1100nm

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

0.07
0.06
0.07
0.11
0.11
0.11
0.21
0.38
0.45
0.98

4.42
1.53
0.49
0.21
0.11
0.06
0.00
0.03
0.00
0.05

0.09
0.03
0.02
0.01
0.01
0.01
0.00
0.01
0.06
0.17

0.02
0.01
0.00
0.00
0.04
0.52
0.20
0.06
0.08
0.10

0.07
0.06
0.07
0.11
0.11

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

0.11
0.21
0.38
0.45
0.98
3.04
5.36
20.92
60.72
87.67

96.41
93.27
94.29
95.28
85.37
78.03
49.21
10.49
1.32
0.23

0.07
0.04
0.02
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