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Unmounted Longpass Colored Glass Filters


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Unmounted Longpass Colored Glass Filters

Longpass Filter Selection
Ø25 mm2" x 2"6" x 6"Longpass Region
FGL280aFGL280S 280 - 1800 nm
FGL400aFGL400S 400 - 1800 nm
FGL420  420 - 2500 nm
FGL435aFGL435S 435 - 1800 nm
FGL455  460 - 2500 nm
FGL495aFGL495S 495 - 1800 nm
FGL515aFGL515S 515 - 1800 nm
FGL530  540 - 2500 nm
FGL550aFGL550S 550 - 1800 nm
FGL570  570 - 2500 nm
FGL590aFGL590S 590 - 1800 nm
FGL610aFGL610SFGL610H610 - 1800 nm
FGL630  630 - 2500 nm
FGL645  650 - 2500 nm
FGL665aFGL665S 665 - 1800 nm
FGL695  700 - 2500 nm
FGL715aFGL715S 715 - 1800 nm
FGL9  721 - 1035 nm
FGL780aFGL780SFGL780H780 - 1800 nm
FGL830  830 - 2500 nm
FGL850aFGL850SFGL850H850 - 1800 nm
FGL1000aFGL1000S 1000 - 1800 nm
  • These filters are also available in a mounted version.

Features

  • Longpass Region Cut-On Options Available from 280 to 1000 nm
  • Ø25 mm Rounds, 2" x 2" Squares, or 6" x 6" Squares
  • Kits Include Selected Longpass and Bandpass Filters

These longpass colored glass filters are manufactured from different colors of Schott glass and are intended for use in a wide variety of applications. In addition to the longpass filters offered here, Thorlabs also offers a series of bandpass colored glass filters. In either case, the filters are available in both round and square varieties. The 25 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" filter, we recommend the FP02 Plate Holder.

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 edgepass 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. These are the same storage boxes that our kit filters arrive in. 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
BandpassLongpass
MountedUnmountedAR CoatedMountedUnmounted
Colored Filter Dimensions
General Specifications
MaterialSchott Colored Glass
SizeØ25 mm2" x 2"6" x 6"
Thickness2 mm3 mm
Surface Quality40-20 Scratch-Dig
Surface Flatness<λ @ 632.8 nm<λ @ 632.8 nm
over 1"
<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
Damage Threshold 30 W/cm2 (Typ.)
Clear Aperture80% of Diameter 80% of Length and Width
Item #
(Ø25 mm)
Item #
(2" Square)
Item #
(6" Square)
Schott
Glass
Description
FGL280aFGL280S N-WG280280 nm Longpass
FGL400aFGL400S GG400400 nm Longpass
FGL420   GG420420 nm Longpass
FGL435aFGL435S GG435435 nm Longpass
FGL455  GG455460 nm Longpass
FGL495aFGL495S GG495495 nm Longpass
FGL515aFGL515S OG515515 nm Longpass
FGL530   OG530540 nm Longpass
FGL550aFGL550S OG550550 nm Longpass
FGL570  OG570570 nm Longpass
FGL590aFGL590S OG590590 nm Longpass
FGL610aFGL610SFGL610HRG610610 nm Longpass
FGL630  RG630630 nm Longpass
FGL645  RG645650 nm Longpass
FGL665aFGL665S RG665665 nm Longpass
FGL695   RG695700 nm Longpass
FGL715aFGL715S RG715715 nm Longpass
FGL9   RG9721 nm Longpass
FGL780aFGL780SFGL780HRG780780 nm Longpass
FGL830   RG830830 nm Longpass
FGL850aFGL850SFGL850HRG850850 nm Longpass
FGL1000aFGL1000S RG10001000 nm Longpass
  • These filters are also available in a mounted version.

Below are transmission plots (including surface reflections) as a function of wavelength for each of the colored glass filters presented on this page. Data was obtained for normal incidence. In each case, the shaded region indicates the range for which the transmission was >50% of the maximum transmission for that particular filter. To enlarge the plot, simply click on the plot. Thorlabs also offers bandpass colored filters.

Click on Graphs to Enlarge:

Transmission of FGL400
Transmission for FGL280
Transmission of FGL435
Transmission of FGL420
Transmission for FGL495
Transmission of FGL455
Transmission of FGL530
Transmission of FGL515
Transmission of FGL570
Transmission of FGL550
FGL610 Transmission Graph
Transmission of FGL590
Transmission of FGL645
Transmission of FGL630
Transmission of FGL695
Transmission of FGL665
Transmission of FGL9
Transmission of FGL715
Transmission of FGL830
FGL780 Transmission
Transmission of FGL1000
FGL850 Transmission
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Posted Comments:
Poster: jlow
Posted Date: 2013-01-21 16:15:00.0
Response from Jeremy at Thorlabs: The long pass and bandpass filters can be used with Xenon lamp. The specs might differ slightly since the angle of incidence is not 0°.
Poster: l.costantini
Posted Date: 2013-01-11 16:23:22.247
Hi, I'm Luca Costantini from Strategie s.r.l. and i should to know if the filter long pass and bandpass operates with xenon lamp
Poster: tholste
Posted Date: 2012-07-27 17:49:00.0
A response from Tor at Thorlabs to nateb: Thank you very much for contacting us. We also observe fluorescence at 532 nm for this filter - we will update this page with respect to these findings. In the meantime, I will be contacting you to discuss your application.
Poster: nateb
Posted Date: 2012-07-23 11:30:48.0
Using information from the Schott website and the information contained on the Thorlabs website I chose the FGL590 longpass filter. Unfortunately, I found that the filter fluoresced strongly under 532 nm light. Using a 15-50 mW 532 DPSS laser I illuminated the backside of the filter and found that there is a visible orange glow emitting from the filter. I would expect an OD5 blocking at this wavelength (532 nm). This fluorescence effect should be listed.
Poster: tcohen
Posted Date: 2012-07-17 13:49:00.0
Response from Tim at Thorlabs: Thank you for contacting us! I will email you the spectral data.
Poster: mzlin
Posted Date: 2012-07-16 19:36:05.0
How do these compare to your edgepass filters in slope steepness? I had a difficult time figuring this out with only the graphs showing divisions 100 or 200 nm apart. Would it be possible to email me the spectra of the 715 and 721 longpass colored filters please? Thank you!
Poster: tcohen
Posted Date: 2012-06-28 14:44:00.0
Response from Tim at Thorlabs: Thank you for your feedback! We have introduced the new FGL570 filters with 25mm OD because of the popularity of the size. We also have a larger version of the CFH1, the CFH2, for 1” diameter filters. If you are interested in ½” filters to retrofit into your system, we should be able to quote this as a custom for you and I have contacted you to discuss this option.
Poster: cbrideau
Posted Date: 2012-06-27 18:52:41.0
Any chance of getting these in 1/2" round instead of 1"? I'm using the little 1/2" filter holders (CFH1) and I'd like to use these colored glass filters with them.
Poster: technicalmarketing
Posted Date: 2008-02-14 17:25:57.0
We have double checked and the graphs shown in V19 are incorrect. Please refer to the web for the most up-to-date graphs
Poster: ghegenbart
Posted Date: 2007-11-20 04:38:25.0
The graph for the BG40 glass in the "Graph" tab is different from the graph shown on the pdf copy of the catalog page in the "Drawings&Documents" tab.
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Unmounted 280 nm Longpass Colored Glass Filters
FGL280 Transmission Curve
Click Here for Raw Data
Click to Enlarge
  • Fabricated from 2 mm Thick N-WG280 Schott Glass
  • Choose from 25 mm Round or 2" x 2" Square

Transmission (including surface reflections) is plotted as a function of wavelength to the right. The region shaded in blue represents the range over which this filter is transmissive. At wavelengths shorter than the cut-on wavelength, the filter blocks the light.

Based on your currency / country selection, your order will ship from Newton, New Jersey  
+1 Qty Docs Part Number - Universal/Imperial Price Available / Ships
FGL280 Support Documentation
FGL280 Ø25 mm N-WG280 Colored Glass Filter, 280 nm Longpass
$34.64
Today
FGL280S Support Documentation
FGL280S 2" Square N-WG280 Colored Glass Filter, 280 nm Longpass
$70.08
Today
Unmounted 400 nm Longpass Colored Glass Filters
FGL400 Transmission Curve
Click Here for Raw Data
Click to Enlarge
  • Fabricated from 2 mm Thick GG400 Schott Glass
  • Choose from 25 mm Round or 2" x 2" Square

Transmission (including surface reflections) is plotted as a function of wavelength to the right. The region shaded in blue represents the range over which this filter is transmissive. At wavelengths shorter than the cut-on wavelength, the filter blocks the light.

Based on your currency / country selection, your order will ship from Newton, New Jersey  
+1 Qty Docs Part Number - Universal/Imperial Price Available / Ships
FGL400 Support Documentation
FGL400 Ø25 mm GG400 Colored Glass Filter, 400 nm Longpass
$34.64
Today
FGL400S Support Documentation
FGL400S 2" Square GG400 Colored Glass Filter, 400 nm Longpass
$70.08
Today
Unmounted 420 nm Longpass Colored Glass Filter
FGL420 Transmission Curve
Click Here for Raw Data
Click to Enlarge
  • Fabricated from 2 mm Thick GG420 Schott Glass
  • 25 mm Round Filter

Transmission (including surface reflections) is plotted as a function of wavelength to the right. The region shaded in blue represents the range over which this filter is transmissive. At wavelengths shorter than the cut-on wavelength, the filter blocks the light.

Based on your currency / country selection, your order will ship from Newton, New Jersey  
+1 Qty Docs Part Number - Universal/Imperial Price Available / Ships
FGL420 Support Documentation
FGL420 Customer Inspired! Ø25 mm GG420 Colored Glass Filter, 420 nm Longpass
$25.00
Today
Unmounted 435 nm Longpass Colored Glass Filters
FGL435 Transmission Curve
Click Here for Raw Data
Click to Enlarge
  • Fabricated from 2 mm Thick GG435 Schott Glass
  • Choose from 25 mm Round or 2" x 2" Square

Transmission (including surface reflections) is plotted as a function of wavelength to the right. The region shaded in blue represents the range over which this filter is transmissive. At wavelengths shorter than the cut-on wavelength, the filter blocks the light.

Based on your currency / country selection, your order will ship from Newton, New Jersey  
+1 Qty Docs Part Number - Universal/Imperial Price Available / Ships
FGL435 Support Documentation
FGL435 Ø25 mm GG435 Colored Glass Filter, 435 nm Longpass
$34.64
Today
FGL435S Support Documentation
FGL435S 2" Square GG435 Colored Glass Filter, 435 nm Longpass
$70.08
Today
Unmounted 460 nm Longpass Colored Glass Filter
FGL455 Transmission Curve
Click Here for Raw Data
Click to Enlarge
  • Fabricated from 2 mm Thick GG455 Schott Glass
  • 25 mm Round Filter

Transmission (including surface reflections) is plotted as a function of wavelength to the right. The region shaded in blue represents the range over which this filter is transmissive. At wavelengths shorter than the cut-on wavelength, the filter blocks the light.

Based on your currency / country selection, your order will ship from Newton, New Jersey  
+1 Qty Docs Part Number - Universal/Imperial Price Available / Ships
FGL455 Support Documentation
FGL455 Customer Inspired! Ø25 mm GG455 Colored Glass Filter, 460 nm Longpass
$25.00
Today
Unmounted 495 nm Longpass Colored Glass Filters
FGL495 Transmission Curve
Click Here for Raw Data
Click to Enlarge
  • Fabricated from 2 mm Thick GG495 Schott Glass
  • Choose from 25 mm Round or 2" x 2" Square

Transmission (including surface reflections) is plotted as a function of wavelength to the right. The region shaded in blue represents the range over which this filter is transmissive. At wavelengths shorter than the cut-on wavelength, the filter blocks the light.

Based on your currency / country selection, your order will ship from Newton, New Jersey  
+1 Qty Docs Part Number - Universal/Imperial Price Available / Ships
FGL495 Support Documentation
FGL495 Ø25 mm GG495 Colored Glass Filter, 495 nm Longpass
$34.64
Today
FGL495S Support Documentation
FGL495S 2" Square GG495 Colored Glass Filter, 495 nm Longpass
$70.08
Today
Unmounted 515 nm Longpass Colored Glass Filters
FGL515 Transmission Curve
Click Here for Raw Data
Click to Enlarge
  • Fabricated from 2 mm Thick OG515 Schott Glass
  • Choose from 25 mm Round or 2" x 2" Square

Transmission (including surface reflections) is plotted as a function of wavelength to the right. The region shaded in blue represents the range over which this filter is transmissive. At wavelengths shorter than the cut-on wavelength, the filter blocks the light.

Based on your currency / country selection, your order will ship from Newton, New Jersey  
+1 Qty Docs Part Number - Universal/Imperial Price Available / Ships
FGL515 Support Documentation
FGL515 Ø25 mm OG515 Colored Glass Filter, 515 nm Longpass
$34.64
Today
FGL515S Support Documentation
FGL515S 2" Square OG515 Colored Glass Filter, 515 nm Longpass
$70.08
Today
Unmounted 540 nm Longpass Colored Glass Filter
FGL530 Transmission Curve
Click Here for Raw Data
Click to Enlarge
  • Fabricated from 2 mm Thick OG530 Schott Glass
  • 25 mm Round Filter

Transmission (including surface reflections) is plotted as a function of wavelength to the right. The region shaded in blue represents the range over which this filter is transmissive. At wavelengths shorter than the cut-on wavelength, the filter blocks the light.

Based on your currency / country selection, your order will ship from Newton, New Jersey  
+1 Qty Docs Part Number - Universal/Imperial Price Available / Ships
FGL530 Support Documentation
FGL530 Customer Inspired! Ø25 mm OG530 Colored Glass Filter, 530 nm Longpass
$25.00
Today
Unmounted 550 nm Longpass Colored Glass Filters
FGL550 Transmission Curve
Click Here for Raw Data
Click to Enlarge
  • Fabricated from 2 mm Thick OG550 Schott Glass
  • Choose from 25 mm Round or 2" x 2" Square

Transmission (including surface reflections) is plotted as a function of wavelength to the right. The region shaded in blue represents the range over which this filter is transmissive. At wavelengths shorter than the cut-on wavelength, the filter blocks the light.

Based on your currency / country selection, your order will ship from Newton, New Jersey  
+1 Qty Docs Part Number - Universal/Imperial Price Available / Ships
FGL550 Support Documentation
FGL550 Ø25 mm OG550 Colored Glass Filter, 550 nm Longpass
$34.64
Today
FGL550S Support Documentation
FGL550S 2" Square OG550 Colored Glass Filter, 550 nm Longpass
$70.08
Today
Unmounted 570 nm Longpass Colored Glass Filter
FGL570 Transmission Curve
Click Here for Raw Data
Click to Enlarge
  • Fabricated from 2 mm Thick OG570 Schott Glass
  • 25 mm Round Filter

Transmission (including surface reflections) is plotted as a function of wavelength to the right. The region shaded in blue represents the range over which this filter is transmissive. At wavelengths shorter than the cut-on wavelength, the filter blocks the light.

Based on your currency / country selection, your order will ship from Newton, New Jersey  
+1 Qty Docs Part Number - Universal/Imperial Price Available / Ships
FGL570 Support Documentation
FGL570 Customer Inspired! Ø25 mm OG570 Colored Glass Filter, 570 nm Longpass
$25.00
Today
Unmounted 590 nm Longpass Colored Glass Filters
FGL590 Transmission Curve
Click Here for Raw Data
Click to Enlarge
  • Fabricated from 2 mm Thick OG590 Schott Glass
  • Choose from 25 mm Round or 2" x 2" Square

Transmission (including surface reflections) is plotted as a function of wavelength to the right. The region shaded in blue represents the range over which this filter is transmissive. At wavelengths shorter than the cut-on wavelength, the filter blocks the light.

Based on your currency / country selection, your order will ship from Newton, New Jersey  
+1 Qty Docs Part Number - Universal/Imperial Price Available / Ships
FGL590 Support Documentation
FGL590 Ø25 mm OG590 Colored Glass Filter, 590 nm Longpass
$34.64
Today
FGL590S Support Documentation
FGL590S 2" Square OG590 Colored Glass Filter, 590 nm Longpass
$70.08
Today
Unmounted 610 nm Longpass Colored Glass Filters
FGL610 Transmission Curve
Click Here for Raw Data
Click to Enlarge
  • Fabricated from 2 mm Thick (3 mm for the 6" Version) RG610 Schott Glass
  • Choose from 25 mm Round, 2" x 2" Square, or 6" x 6" Square

Transmission (including surface reflections) is plotted as a function of wavelength to the right. The region shaded in blue represents the range over which this filter is transmissive. At wavelengths shorter than the cut-on wavelength, the filter blocks the light.

Based on your currency / country selection, your order will ship from Newton, New Jersey  
+1 Qty Docs Part Number - Universal/Imperial Price Available / Ships
FGL610 Support Documentation
FGL610 Ø25 mm RG610 Colored Glass Filter, 610 nm Longpass
$34.64
Today
FGL610S Support Documentation
FGL610S 2" Square RG610 Colored Glass Filter, 610 nm Longpass
$70.08
Today
FGL610H Support Documentation
FGL610H 6" Square RG610 Colored Glass Filter, 610 nm Longpass
$320.00
Today
Unmounted 630 nm Longpass Colored Glass Filter
FGL630 Transmission Curve
Click Here for Raw Data
Click to Enlarge
  • Fabricated from 2 mm Thick RG630 Schott Glass
  • 25 mm Round Filter

Transmission (including surface reflections) is plotted as a function of wavelength to the right. The region shaded in blue represents the range over which this filter is transmissive. At wavelengths shorter than the cut-on wavelength, the filter blocks the light.

Based on your currency / country selection, your order will ship from Newton, New Jersey  
+1 Qty Docs Part Number - Universal/Imperial Price Available / Ships
FGL630 Support Documentation
FGL630 Customer Inspired! Ø25 mm RG630 Colored Glass Filter, 630 nm Longpass
$25.00
Today
Unmounted 650 nm Longpass Colored Glass Filter
FGL645 Transmission Curve
Click Here for Raw Data
Click to Enlarge
  • Fabricated from 2 mm Thick RG645 Schott Glass
  • 25 mm Round Filter

Transmission (including surface reflections) is plotted as a function of wavelength to the right. The region shaded in blue represents the range over which this filter is transmissive. At wavelengths shorter than the cut-on wavelength, the filter blocks the light.

Based on your currency / country selection, your order will ship from Newton, New Jersey  
+1 Qty Docs Part Number - Universal/Imperial Price Available / Ships
FGL645 Support Documentation
FGL645 Customer Inspired! Ø25 mm RG645 Colored Glass Filter, 650 nm Longpass
$25.00
Today
Unmounted 665 nm Longpass Colored Glass Filters
FGL665 Transmission Curve
Click Here for Raw Data
Click to Enlarge
  • Fabricated from 2 mm Thick RG665 Schott Glass
  • Choose from 25 mm Round or 2" x 2" Square

Transmission (including surface reflections) is plotted as a function of wavelength to the right. The region shaded in blue represents the range over which this filter is transmissive. At wavelengths shorter than the cut-on wavelength, the filter blocks the light.

Please click here for an Excel spreadsheet containing the raw transmission data.

Based on your currency / country selection, your order will ship from Newton, New Jersey  
+1 Qty Docs Part Number - Universal/Imperial Price Available / Ships
FGL665 Support Documentation
FGL665 Ø25 mm RG665 Colored Glass Filter, 665 nm Longpass
$34.64
Today
FGL665S Support Documentation
FGL665S 2" Square RG665 Colored Glass Filter, 665 nm Longpass
$70.08
Today
Unmounted 700 nm Longpass Colored Glass Filter
FGL695 Transmission Curve
Click Here for Raw Data
Click to Enlarge
  • Fabricated from 2 mm Thick RG695 Schott Glass
  • 25 mm Round Filter

Transmission (including surface reflections) is plotted as a function of wavelength to the right. The region shaded in blue represents the range over which this filter is transmissive. At wavelengths shorter than the cut-on wavelength, the filter blocks the light.

Please click here for an Excel spreadsheet containing the raw transmission data.

Based on your currency / country selection, your order will ship from Newton, New Jersey  
+1 Qty Docs Part Number - Universal/Imperial Price Available / Ships
FGL695 Support Documentation
FGL695 Customer Inspired! Ø25 mm RG695 Colored Glass Filter, 695 nm Longpass
$25.00
Today
Unmounted 715 nm Longpass Colored Glass Filters
FGL715 Transmission Curve
Click Here for Raw Data
Click to Enlarge
  • Fabricated from 2 mm Thick RG715 Schott Glass
  • Choose from 25 mm Round or 2" x 2" Square

Transmission (including surface reflections) is plotted as a function of wavelength to the right. The region shaded in blue represents the range over which this filter is transmissive. At wavelengths shorter than the cut-on wavelength, the filter blocks the light.

Based on your currency / country selection, your order will ship from Newton, New Jersey  
+1 Qty Docs Part Number - Universal/Imperial Price Available / Ships
FGL715 Support Documentation
FGL715 Ø25 mm RG715 Colored Glass Filter, 715 nm Longpass
$39.52
Today
FGL715S Support Documentation
FGL715S 2" Square RG715 Colored Glass Filter, 715 nm Longpass
$70.08
Today
Unmounted 721 nm Longpass Colored Glass Filter
FGL9 Transmission Curve
Click Here for Raw Data
Click to Enlarge
  • Fabricated from 2 mm Thick RG9 Schott Glass
  • 25 mm Round Filter

Transmission (including surface reflections) is plotted as a function of wavelength to the right. The region shaded in blue represents the range over which this filter is transmissive. At wavelengths shorter than the cut-on wavelength, the filter blocks the light.

Based on your currency / country selection, your order will ship from Newton, New Jersey  
+1 Qty Docs Part Number - Universal/Imperial Price Available / Ships
FGL9 Support Documentation
FGL9 Customer Inspired! Ø25 mm RG9 Colored Glass Filter, 721 nm Longpass
$25.00
Today
Unmounted 780 nm Longpass Colored Glass Filters
FGL780 Transmission Curve
Click Here for Raw Data
Click to Enlarge
  • Fabricated from 2 mm Thick (3 mm for the 6" Version) RG780 Schott Glass
  • Choose from 25 mm Round, 2" x 2" Square, or 6" x 6" Square

Transmission (including surface reflections) is plotted as a function of wavelength to the right. The region shaded in blue represents the range over which this filter is transmissive. At wavelengths shorter than the cut-on wavelength, the filter blocks the light.

Based on your currency / country selection, your order will ship from Newton, New Jersey  
+1 Qty Docs Part Number - Universal/Imperial Price Available / Ships
FGL780 Support Documentation
FGL780 Ø25 mm RG780 Colored Glass Filter, 780 nm Longpass
$39.52
Today
FGL780S Support Documentation
FGL780S 2" Square RG780 Colored Glass Filter, 780 nm Longpass
$70.08
Today
FGL780H Support Documentation
FGL780H 6" Square RG780 Colored Glass Filter, 780 nm Longpass
$495.00
Today
Unmounted 830 nm Longpass Colored Glass Filter
FGL830 Transmission Curve
Click Here for Raw Data
Click to Enlarge
  • Fabricated from 2 mm Thick RG830 Schott Glass
  • 25 mm Round Filter

Transmission (including surface reflections) is plotted as a function of wavelength to the right. The region shaded in blue represents the range over which this filter is transmissive. At wavelengths shorter than the cut-on wavelength, the filter blocks the light.

Based on your currency / country selection, your order will ship from Newton, New Jersey  
+1 Qty Docs Part Number - Universal/Imperial Price Available / Ships
FGL830 Support Documentation
FGL830 Customer Inspired! Ø25 mm RG830 Colored Glass Filter, 830 nm Longpass
$25.00
Today
Unmounted 850 nm Longpass Colored Glass Filters
FGL850 Transmission Curve
Click Here for Raw Data
Click to Enlarge
  • Fabricated from 2 mm Thick (3 mm for the 6" Version) RG850 Schott Glass
  • Choose from 25 mm Round, 2" x 2" Square, or 6" x 6" Square

Transmission (including surface reflections) is plotted as a function of wavelength to the right. The region shaded in blue represents the range over which this filter is transmissive. At wavelengths shorter than the cut-on wavelength, the filter blocks the light.

Based on your currency / country selection, your order will ship from Newton, New Jersey  
+1 Qty Docs Part Number - Universal/Imperial Price Available / Ships
FGL850 Support Documentation
FGL850 Ø25 mm RG850 Colored Glass Filter, 850 nm Longpass
$49.44
Today
FGL850S Support Documentation
FGL850S 2" Square RG850 Colored Glass Filter, 850 nm Longpass
$72.48
Today
FGL850H Support Documentation
FGL850H 6" Square RG850 Colored Glass Filter, 850 nm Longpass
$495.00
Today
Unmounted 1000 nm Longpass Colored Glass Filters
FGL1000 Transmission Curve
Click Here for Raw Data
Click to Enlarge
  • Fabricated from 2 mm Thick RG1000 Schott Glass
  • Choose from 25 mm Round or 2" x 2" Square

Transmission (including surface reflections) is plotted as a function of wavelength to the right. The region shaded in blue represents the range over which this filter is transmissive. At wavelengths shorter than the cut-on wavelength, the filter blocks the light.

Based on your currency / country selection, your order will ship from Newton, New Jersey  
+1 Qty Docs Part Number - Universal/Imperial Price Available / Ships
FGL1000 Support Documentation
FGL1000 Ø25 mm RG1000 Colored Glass Filter, 1000 nm Longpass
$34.64
Today
FGL1000S Support Documentation
FGL1000S 2" Square RG1000 Colored Glass Filter, 1000 nm Longpass
$70.08
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 part number and bandpass region (for bandpass filters) or cut-on wavelength (for longpass filters), and ship in a KT01 Storage 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 ContentsFGK01S ContentsBandpass RegionTransmission Plot
FGS900M FGS900S 315 - 710 nm Plot
FGB37M FGB37S 335 - 610 nm Plot
FGUVM FGUVS 325 - 385 nm Plot
FGL400M FGL400S 400 - 1800 nm Plot
FGL495M FGL495S 495 - 1800 nm Plot
FGL550M FGL550S 550 - 1800 nm Plot
FGL610M FGL610S 610 - 1800 nm Plot
FGL715M FGL715S 715 - 1800 nm Plot
FGL780M FGL780S 780 - 1800 nm Plot
FGL850M FGL850S 850 - 1800 nm Plot
Based on your currency / country selection, your order will ship from Newton, New Jersey  
+1 Qty Docs Part Number - Universal/Imperial Price Available / Ships
FGK01 Support Documentation
FGK01 Ø25 mm Colored Glass Filter Kit, Mounted in SM1 Lens Tubes, Set of 10
$423.70
Today
FGK01S Support Documentation
FGK01S 2" Square Colored Glass Filter Kit, Unmounted, Set of 10
$630.72
Today
Filter Kit Storage Boxes

If you currently own individual filters and would like to have a box to store them in when not in use, consider our storage boxes. These are the same storage boxes that our kit lenses arrive in. There is one box (KT01) designed for mounted Ø25 mm round filters and a second (KT03) for the 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/Imperial Price Available / Ships
KT01 Support Documentation
KT01 Storage Box for Mounted Ø1" (25 mm) Round Optics (Max. Capacity: 10)
$86.70
Today
KT03 Support Documentation
KT03 Storage Box for Unmounted 2" Square Optics (Max. Capacity: 10)
$81.60
Today
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