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Unmounted Longpass 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

FGL550S

(2" x 2")

FGL435

FGB67

(Ø25 mm)

FGL610

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

  • Longpass Cut-On Wavelengths from 280 to 1000 nm
  • Ø25 mm Round, 2" x 2" Square, or 6" x 6" Square Sizes
  • Kits Include Selected Longpass and Bandpass Filters
  • Edge Blackening Available Upon Request

These longpass 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 longpass filters offered here, Thorlabs also offers a series of bandpass colored glass filters.

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. 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

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Posted Comments:
Poster:jasterb
Posted Date:2017-07-05 12:32:23.21
Would it be possible to get the FGL570 in a 3mm thick 10mm diameter form or alternatively in a 3mm thick 6 inch square?
Poster:nbayconich
Posted Date:2017-07-11 11:12:38.0
Thank you for contacting Thorlabs. I will contact you directly about our custom capabilities.
Poster:mbraithwaite
Posted Date:2017-02-21 15:50:40.613
I've tested and proofed the FGL9 filter for my application. In the short term can you quote me qty=10 FGL9 filters edged down to 0.375" diameter? It's possible that I could need qty=1000 FGL9 filters with 0.375" diameter in 4Q17 and higher volumes later. I should know more about longer tern demand by June. Thanks Michael Braithwaite
Poster:tfrisch
Posted Date:2017-02-23 10:19:43.0
Hello, thank you for contacting Thorlabs. Our Tech Support Team will reach out to you about this quote.
Poster:Carrie_Hsu
Posted Date:2016-02-19 12:58:02.013
Hi, I'm Hsu from Taiwan. What's the operating temperature of FGL400S?
Poster:besembeson
Posted Date:2016-03-03 05:29:22.0
Response from Bweh at Thorlabs USA: You could typically use this in the -50 to 80 deg C temperature environments.
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.

Ø25 mm Unmounted Longpass Filters

Item #
(Click for
Photo)
Transmission Dataa Cut-On
Wavelength
Schott®
Glass #
FGL715b info 715 nm RG715
FGL9 info 721 nmc RG9
FGL780b info 780 nm RG780
FGL830 info 830 nm RG830
FGL850b info 850 nm RG850
FGL1000b info 1000 nm RG1000
  • Click on  for a plot and downloadable data.
  • These filters are also available in a mounted version.
  • This longpass filter has a transmission wavelength range of 721 nm - 1035 nm.
Item #
(Click for
Photo)
Transmission Dataa Cut-On
Wavelength
Schott®
Glass #
FGL550b info 550 nm OG550
FGL570 info 570 nm OG570
FGL590b info 590 nm OG590
FGL610b info 610 nm RG610
FGL630 info 630 nm RG630
FGL645 info 645 nm RG645
FGL665b info 665 nm RG665
FGL695 info 695 nm RG695
Item #
(Click for
Photo)
Transmission Dataa Cut-On
Wavelength
Schott®
Glass #
FGL280b info 280 nm N-WG280
FGL400b info 400 nm GG400
FGL420 info 420 nm GG420
FGL435b info 435 nm GG435
FGL455 info 455 nm GG455
FGL495b info 495 nm GG495
FGL515b info 515 nm OG515
FGL530 info 530 nm OG530
Based on your currency / country selection, your order will ship from Newton, New Jersey  
+1 Qty Docs Part Number - Universal Price Available / Ships
FGL280 Support Documentation
FGL280Ø25 mm N-WG280 Colored Glass Filter, 280 nm Longpass
$35.50
Today
FGL400 Support Documentation
FGL400Ø25 mm GG400 Colored Glass Filter, 400 nm Longpass
$35.50
Today
FGL420 Support Documentation
FGL420Customer Inspired!Ø25 mm GG420 Colored Glass Filter, 420 nm Longpass
$25.50
Today
FGL435 Support Documentation
FGL435Ø25 mm GG435 Colored Glass Filter, 435 nm Longpass
$35.50
Today
FGL455 Support Documentation
FGL455Customer Inspired!Ø25 mm GG455 Colored Glass Filter, 455 nm Longpass
$25.50
Today
FGL495 Support Documentation
FGL495Ø25 mm GG495 Colored Glass Filter, 495 nm Longpass
$35.50
Today
FGL515 Support Documentation
FGL515Ø25 mm OG515 Colored Glass Filter, 515 nm Longpass
$35.50
Today
FGL530 Support Documentation
FGL530Customer Inspired!Ø25 mm OG530 Colored Glass Filter, 530 nm Longpass
$25.50
Today
FGL550 Support Documentation
FGL550Ø25 mm OG550 Colored Glass Filter, 550 nm Longpass
$35.50
Today
FGL570 Support Documentation
FGL570Customer Inspired!Ø25 mm OG570 Colored Glass Filter, 570 nm Longpass
$25.50
Today
FGL590 Support Documentation
FGL590Ø25 mm OG590 Colored Glass Filter, 590 nm Longpass
$35.50
Today
FGL610 Support Documentation
FGL610Ø25 mm RG610 Colored Glass Filter, 610 nm Longpass
$35.50
Today
FGL630 Support Documentation
FGL630Customer Inspired!Ø25 mm RG630 Colored Glass Filter, 630 nm Longpass
$25.50
Today
FGL645 Support Documentation
FGL645Customer Inspired!Ø25 mm RG645 Colored Glass Filter, 645 nm Longpass
$25.50
Today
FGL665 Support Documentation
FGL665Ø25 mm RG665 Colored Glass Filter, 665 nm Longpass
$35.50
Today
FGL695 Support Documentation
FGL695Customer Inspired!Ø25 mm RG695 Colored Glass Filter, 695 nm Longpass
$25.50
Today
FGL715 Support Documentation
FGL715Ø25 mm RG715 Colored Glass Filter, 715 nm Longpass
$40.50
Today
FGL9 Support Documentation
FGL9Customer Inspired!Ø25 mm RG9 Colored Glass Filter, 721 nm Longpass
$25.50
Today
FGL780 Support Documentation
FGL780Ø25 mm RG780 Colored Glass Filter, 780 nm Longpass
$40.50
Today
FGL830 Support Documentation
FGL830Customer Inspired!Ø25 mm RG830 Colored Glass Filter, 830 nm Longpass
$25.50
Today
FGL850 Support Documentation
FGL850Ø25 mm RG850 Colored Glass Filter, 850 nm Longpass
$50.50
Today
FGL1000 Support Documentation
FGL1000Ø25 mm RG1000 Colored Glass Filter, 1000 nm Longpass
$35.50
Today

2" Square Unmounted Longpass Filters

  • Mountable with our Wide Selection of Filter Holders
  • Fabricated from 2 mm Thick Schott® Colored Glass
Item #
(Click for
Photo)
Transmission Dataa Cut-On
Wavelength
Schott®
Glass #
FGL715S info 715 nm RG715
FGL780S info 780 nm RG780
FGL850S info 850 nm RG850
FGL1000S info 1000 nm RG1000
  • Click on  for a plot and downloadable data.
Item #
(Click for
Photo)
Transmission Dataa Cut-On
Wavelength
Schott®
Glass #
FGL550S info 550 nm OG550
FGL590S info 590 nm OG590
FGL610S info 610 nm RG610
FGL665S info 665 nm RG665
Item #
(Click for
Photo)
Transmission Dataa Cut-On
Wavelength
Schott®
Glass #
FGL280S info 280 nm N-WG280
FGL400S info 400 nm GG400
FGL435S info 435 nm GG435
FGL495S info 495 nm GG495
FGL515S info 515 nm OG515
Based on your currency / country selection, your order will ship from Newton, New Jersey  
+1 Qty Docs Part Number - Universal Price Available / Ships
FGL280S Support Documentation
FGL280S2" Square N-WG280 Colored Glass Filter, 280 nm Longpass
$71.50
Today
FGL400S Support Documentation
FGL400S2" Square GG400 Colored Glass Filter, 400 nm Longpass
$71.50
Today
FGL435S Support Documentation
FGL435S2" Square GG435 Colored Glass Filter, 435 nm Longpass
$71.50
Today
FGL495S Support Documentation
FGL495S2" Square GG495 Colored Glass Filter, 495 nm Longpass
$71.50
Today
FGL515S Support Documentation
FGL515S2" Square OG515 Colored Glass Filter, 515 nm Longpass
$71.50
Today
FGL550S Support Documentation
FGL550S2" Square OG550 Colored Glass Filter, 550 nm Longpass
$71.50
Today
FGL590S Support Documentation
FGL590S2" Square OG590 Colored Glass Filter, 590 nm Longpass
$71.50
Today
FGL610S Support Documentation
FGL610S2" Square RG610 Colored Glass Filter, 610 nm Longpass
$71.50
Today
FGL665S Support Documentation
FGL665S2" Square RG665 Colored Glass Filter, 665 nm Longpass
$71.50
Today
FGL715S Support Documentation
FGL715S2" Square RG715 Colored Glass Filter, 715 nm Longpass
$71.50
Today
FGL780S Support Documentation
FGL780S2" Square RG780 Colored Glass Filter, 780 nm Longpass
$71.50
Today
FGL850S Support Documentation
FGL850S2" Square RG850 Colored Glass Filter, 850 nm Longpass
$74.00
Today
FGL1000S Support Documentation
FGL1000S2" Square RG1000 Colored Glass Filter, 1000 nm Longpass
$71.50
Today

6" Square Unmounted Longpass Filters

Item #
(Click for Photo)
Transmission
Data
Cut-On
Wavelength
Schott®
Glass #
FGL610H info 610 nm RG610
FGL780H info 780 nm RG780
FGL850H info 850 nm RG850
  • 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® Colored Glass
Based on your currency / country selection, your order will ship from Newton, New Jersey  
+1 Qty Docs Part Number - Universal Price Available / Ships
FGL610H Support Documentation
FGL610H6" Square RG610 Colored Glass Filter, 610 nm Longpass
$327.00
Today
FGL780H Support Documentation
FGL780H6" Square RG780 Colored Glass Filter, 780 nm Longpass
$505.00
Today
FGL850H Support Documentation
FGL850H6" Square RG850 Colored Glass Filter, 850 nm Longpass
$505.00
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 / Ships
FGK01 Support Documentation
FGK01Ø25 mm Round Colored Glass Filter Kit, Mounted in SM1 Lens Tubes
$433.00
Today
FGK01S Support Documentation
FGK01SColored Glass Filter Kit, Unmounted, Set of 10
$644.00
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 / Ships
KT01 Support Documentation
KT01Storage Box for Mounted Ø1" (25 mm) Round Optics (Max. Capacity: 10)
$88.50
Today
KT03 Support Documentation
KT03Storage Box for Unmounted 2" Square Optics (Max. Capacity: 10)
$83.25
Today
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