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Unmounted Bandpass Colored Glass Filters


  • Ø25 mm Rounds, 2" x 2" Squares, or 6" x 6" Squares
  • Economic Alternative to Thin-Film Interference Filters
  • Selection Available in Kits

FGB37S

(2" x 2")

FGUV5

FGB25

FGK01

Related Items


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General Specifications
Size Ø25 mm 2" x 2" 6" x 6"
Thickness 2 mm 3 mm
Surface Quality 40-20 Scratch-Dig
Surface Flatness <λ @ 632.8 nm <λ @ 632.8 nm over 1"
Tolerance +0.0/-0.4 mm
(Diameter)
+0.0/-0.4 mm
(Length and Width of Square Filter)
Wedge <3 arcmin <5 arcmin
Clear Aperture 80% of Diameter 80% of Length and Width
Material Schott® Colored Glass

Features

  • Bandpass Regions Between 240 and 1375 nm
  • Ø25 mm Round, 2" x 2" Square, or 6" x 6" Square Sizes
  • Kits Include Selection of Bandpass and Longpass Filters

These bandpass colored glass filters are manufactured from different colors of Schott® glass and are intended for use in a wide variety of applications. The filters are available in both round and square varieties. The Ø25 mm round filters will fit into our manual or motorized filter wheels; alternatively, they can be mounted in a lens tube. A selection of Ø25 mm filters is available premounted. To mount the 2" x 2" square filters, choose from our selection of fixed filter holders. For the 6" x 6" filters, we recommend the FP02 Plate Holder. In addition to the bandpass filters offered here, Thorlabs offers a series of longpass colored glass filters. If transmission ratios greater than those provided by the filters listed here are required, we provide a selection of bandpass colored glass filters with antireflective coatings.

Several of the colored glasses used for our filters are fluorescent at certain wavelengths; for more details on how this may affect certain applications, contact Technical Support. For narrowband sources, we recommend our dielectric bandpass filters.

Colored Glass Filter Kits
Thorlabs also offers two filter kits containing our most popular bandpass and longpass filters. For specific product details, please see the bottom of the page.

Storage Boxes
If you purchase individual filters and would like to have a safe, convenient way to store them when not in use, consider our storage boxes. There is one box (KT01) designed for mounted Ø25 mm filters and a second (KT03) for the unmounted 2" x 2" filters.

Colored Glass Selection Guide
Bandpass Longpass Color-Temperature-Balancing
Mounted Unmounted AR Coated Mounted Unmounted Mounted and Unmounted

Posted Comments:
andrea.capozzi  (posted 2016-10-05 07:58:50.033)
Dear ThorLab, I would like to perform some UV light illumination experiments. I have a broad-band source (300-450 nm) with an illumination circular spot of 7 mm of diameter. In order to fit the filter in my setup it has to be a circle of 7 mm diameter as well. Would it be possible to cut/mill/grind the 25 mm filters you sell (how resistent is the material)? In case I have to do it myself (and I wuld like to know how) or you can take care? Best Andrea Capozzi, PhD
jlow  (posted 2016-10-05 02:04:55.0)
Response from Jeremy at Thorlabs: We can edge the filter down to the size you need. I will contact you directly about the quote.
mg9420  (posted 2016-08-02 13:05:23.407)
Hello ,Thorlab We are pleased to receive your letter We need some filters that diameter is half inch. Item Quantity 1.FGUV11-UV *2 2.FGL570 *2 3.NE02A-A *1 4.NENIR05B-C *1 We would like to make an inquiry. My company from Taiwan,Bolite Co., Ltd.
mg9420  (posted 2016-07-29 02:02:28.56)
In our experiment we need some bandpass colored glass filters that diameter is half inch. I want to customized it. Can you customized it for me?
beckham18274  (posted 2015-04-25 08:15:21.977)
Hi:) i have question! what is bandwidth of FGUV5? please tell me~~
jlow  (posted 2015-04-28 03:54:14.0)
Response from Jeremy at Thorlabs: The transmission graph for each filter is located in the subgroup of each filter. There's also the raw data available for download. The shaded region, which denotes the spectral range for which the transmission is >50% of the maximum transmission, represents the range for which we recommend using this colored filter.
giuseppe.vitucci  (posted 2015-01-15 04:02:14.807)
May I ask you an excel sheet with the values of trasmittance vs wavelength of the item FGB67?
jlow  (posted 2015-01-15 01:15:41.0)
Response from Jeremy at Thorlabs: The raw data download link can be found right below the transmission graph for each filter.
bdada  (posted 2011-11-15 18:29:00.0)
Response from Buki at Thorlabs: Thank you so much for participating in our Feedback Forum. You've provided us with some great product ideas that we intend to pursue. We can offer custom filters to meet your specifications and we will contact you directly to continue this discussion.
clarafly  (posted 2011-11-10 17:35:53.0)
Do you offer the filter with BG39 color glass? The extinction of BG39 at long wavelength is much better than BG40. Some of the color glasses, such as BG39 and BG40, are quite sensitive to humidity. Can you offer color glass filters with AR coatings on both sides? The coatings can protect the color glasses from humidity and reduce the reflection loss at both surfaces at the same time.
Javier  (posted 2010-06-23 09:54:07.0)
Response from Javier at Thorlabs to orevilla: The tolerance value of +0.0/-0.4 mm also applies to the thickness of the filter.
orevilla  (posted 2010-06-23 06:50:27.0)
In the specs sheet of the FGS900S bandpass filter the thikness is 2mm with a tolerance of +0.0/-0.4mm. Is this correct? It is the same as the dimensional tolerance, but for the thikness is a 20% of variation (it seems to be very high). Thank you in advance for your time.

Ø25 mm Unmounted Bandpass Filters

Item #
(Click for Photo)
Transmission
Dataa
Bandpass Region Schott®
Glass #
FGS600 info 330 - 665 nm KG5
FGB37b info 335 - 610 nm BG40
FGB39 info 360 - 580 nm BG39
FGB18 info 412 - 569 nm BG18
FGB7 info 435 - 500 nm BG7
FGV9 info 485 - 565 nm VG9
FGB67b info 900 - 1375 nm BG36
  • Click on  for a plot and downloadable data.
  • These filters are also available in a mounted version.
Item #
(Click for Photo)
Transmission
Dataa
Bandpass Region Schott®
Glass #
FGUV5b info 240 - 395 nm UG5
FGUV11b info 275 - 375 nm UG11
FGS550 info 304 - 785 nm KG2
FGB25b info 315 - 445 nm
715 - 1095 nm
BG3
FGS900b info 315 - 710 nm KG3
FGS580 info 315 - 725 nm KG1
FGUVb info 325 - 385 nm UG1
Based on your currency / country selection, your order will ship from Newton, New Jersey  
+1 Qty Docs Part Number - Universal Price Available
FGUV5 Support Documentation
FGUV5Ø25 mm UG5 Colored Glass UV-Passing Filter, 240 - 395 nm
$78.99
Today
FGUV11 Support Documentation
FGUV11Ø25 mm UG11 Colored Glass UV-Passing Filter, 275 - 375 nm
$78.99
Today
FGS550 Support Documentation
FGS550Customer Inspired! Ø25 mm KG2 Colored Glass Bandpass Filter, 304 - 785 nm
$28.41
Today
FGB25 Support Documentation
FGB25Ø25 mm BG3 Colored Glass Bandpass Filter, 315 - 445 nm and 715 - 1095 nm
$35.44
Today
FGS900 Support Documentation
FGS900Ø25 mm KG3 Colored Glass Bandpass Filter, 315 - 710 nm
$39.23
Today
FGS580 Support Documentation
FGS580Customer Inspired! Ø25 mm KG1 Colored Glass Bandpass Filter, 315 - 725 nm
$28.41
Today
FGUV Support Documentation
FGUVØ25 mm UG1 Colored Glass Filter, UV-Passing Filter, 325 - 385 nm
$35.44
Today
FGS600 Support Documentation
FGS600Customer Inspired! Ø25 mm KG5 Colored Glass Bandpass Filter, 330 - 665 nm
$28.41
Today
FGB37 Support Documentation
FGB37Ø25 mm BG40 Colored Glass Bandpass Filter, 335 - 610 nm
$53.84
Today
FGB39 Support Documentation
FGB39Customer Inspired! Ø25 mm BG39 Colored Glass Bandpass Filter, 360 - 580 nm
$28.41
Today
FGB18 Support Documentation
FGB18Customer Inspired! Ø25 mm BG18 Colored Glass Bandpass Filter, 412 - 569 nm
$28.41
Today
FGB7 Support Documentation
FGB7Customer Inspired! Ø25 mm BG7 Colored Glass Bandpass Filter, 435 - 500 nm
$28.41
Today
FGV9 Support Documentation
FGV9Customer Inspired!  Ø25 mm VG9 Colored Glass Bandpass Filter, 485 - 565 nm
$39.23
Today
FGB67 Support Documentation
FGB67Ø25 mm BG36 Colored Glass Bandpass Filter, 900 - 1375 nm
$39.23
Today

2" Square Unmounted Bandpass Filters

  • Mountable with our Wide Selection of Filter Holders
  • Fabricated from 2 mm Thick Schott® Colored Glass
Item #
(Click for Photo)
Transmission
Dataa
Bandpass Region Schott®
Glass #
FGUVS info 325 - 385 nm UG1
FGB37S info 335 - 610 nm BG40
FGB67S info 900 - 1375 nm BG36
  • Click on  for a plot and downloadable data.
Item #
(Click for Photo)
Transmission
Dataa
Bandpass Region Schott®
Glass #
FGUV5S info 240 - 395 nm UG5
FGUV11S info 275 - 375 nm UG11
FGB25S info 315 - 445 nm
715 - 1095 nm
BG3
FGS900S info 315 - 710 nm KG3
Based on your currency / country selection, your order will ship from Newton, New Jersey  
+1 Qty Docs Part Number - Universal Price Available
FGUV5S Support Documentation
FGUV5S2" Square UG5 Colored Glass UV-Passing Filter, 240 - 395 nm
$172.06
Today
FGUV11S Support Documentation
FGUV11S2" Square UG11 Colored Glass UV-Passing Filter, 275 - 375 nm
$172.06
Today
FGB25S Support Documentation
FGB25S2" Square BG3 Colored Glass Bandpass Filter, 315 - 445 nm and 715 - 1095 nm
$71.96
Today
FGS900S Support Documentation
FGS900S2" Square KG3 Colored Glass Bandpass Filter, 315 - 710 nm
$77.37
Today
FGUVS Support Documentation
FGUVS2" Square UG1 Colored Glass UV-Passing Filter, 325 - 385 nm
$69.54
Today
FGB37S Support Documentation
FGB37S2" Square BG40 Colored Glass Bandpass Filter, 335 - 610 nm
$77.37
Today
FGB67S Support Documentation
FGB67S2" Square BG36 Colored Glass Bandpass Filter, 900 - 1375 nm
$78.99
Today

6" Square Unmounted Bandpass Filters

Item #
(Click for Photo)
Transmission
Dataa
Bandpass Region Schott®
Glass #
FGS900H info 315 - 710 nm KG3
FGB37H info 335 - 610 nm BG40
  • Click on for a plot and downloadable data.
  • 6" Square Filters Offer Large Surface Area for Large Beams
  • Mountable to Breadboards and Ø1/2" Posts with the FP02 Plate Holder
  • Fabricated from 3 mm Thick Schott® Glass
Based on your currency / country selection, your order will ship from Newton, New Jersey  
+1 Qty Docs Part Number - Universal Price Available
FGS900H Support Documentation
FGS900H6" Square KG3 Colored Glass Bandpass Filter, 315 - 710 nm
$546.47
Today
FGB37H Support Documentation
FGB37H6" Square BG40 Colored Glass Bandpass Filter, 335 - 610 nm
$398.22
Today

Colored Filter Kits

Thorlabs offers two filter kits that bundle our most popular longpass and bandpass colored glass filters. The FGK01 Colored Glass Filter Kit contains three filters from our bandpass family and seven from our longpass family. The Ø25 mm filters are premounted in an SM1L03 lens tube that is engraved with the Item # and bandpass region (for bandpass filters) or cut-on wavelength (for longpass filters), and ship in a box with labeled slots to aid organization. The FGK01S Colored Glass Filter Kit contains the unmounted, square 2" x 2" counterparts to the filters in the FGK01.

FGK01 Contents FGK01S Contents Bandpass Region
or Cut-On Wavelength
Transmission Plot
FGS900M FGS900S 315 - 710 nm Plot
FGB37M FGB37S 335 - 610 nm Plot
FGUVM FGUVS 325 - 385 nm Plot
FGL400M FGL400S 400 nm Plot
FGL495M FGL495S 495 nm Plot
FGL550M FGL550S 550 nm Plot
FGL610M FGL610S 610 nm Plot
FGL715M FGL715S 715 nm Plot
FGL780M FGL780S 780 nm Plot
FGL850M FGL850S 850 nm Plot
Based on your currency / country selection, your order will ship from Newton, New Jersey  
+1 Qty Docs Part Number - Universal Price Available
FGK01 Support Documentation
FGK01Ø25 mm Round Colored Glass Filter Kit, Mounted in SM1 Lens Tubes
$468.56
Today
FGK01S Support Documentation
FGK01SColored Glass Filter Kit, Unmounted, Set of 10
$696.89
Today

Filter Storage Boxes

If you purchase individual filters and would like a safe, convenient place to store them when not in use, consider our KT01 and KT03 Storage Boxes. The KT01 is designed to hold up to ten mounted Ø25 mm filters, while the KT03 can hold up to ten unmounted 2" x 2" filters.

Based on your currency / country selection, your order will ship from Newton, New Jersey  
+1 Qty Docs Part Number - Universal Price Available
KT01 Support Documentation
KT01Storage Box for Mounted Ø1" (25 mm) Round Optics (Max. Capacity: 10)
$95.77
Today
KT03 Support Documentation
KT03Storage Box for Unmounted 2" Square Optics (Max. Capacity: 10)
$90.09
Today
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