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Mounted Longpass Colored Glass Filters


  • Mounted Ø25 mm Filters
  • Longpass Cut-On Wavelengths from 280 to 1000 nm
  • Selection Available in Kits

FGL495M

FGL590M

Application Idea

FGL1000M in Front of DET30B2 Ge Photodetector

Related Items


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General Specifications
Material Schott® Colored Glass
Diameter 25 mm
Clear Aperture 80% of Diameter
Thickness 2 mm
Thickness Tolerance +0.0 mm/-0.4 mm
Surface Quality 40-20 Scratch-Dig
Surface Flatness <λ @ 633 nm
Wedge <3 arcmin

Features

  • Longpass Cut-On Wavelengths from 280 to 1000 nm
  • Ø25 mm Filters
  • Transmissive Up to At Least 1800 nm
  • SM1-Threaded Mount, Engraved with Item # and Description
  • Kit Includes Selected Longpass and Bandpass Filters

Thorlabs' Mounted Longpass Colored Glass Filters are manufactured from different colors of Schott® glass and are intended for use in a wide variety of applications. The SM1-mounted (1.035"-40), Ø25 mm filters will thread into our manual or motorized filter wheels or any of our lens tube accessories. The housing is engraved with the Item # and longpass cut-on wavelength for easy identification. If the longpass filter you require is not listed here, it may be available in an unmounted version.

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 Kit
Thorlabs offers a boxed filter kit containing a selection of our most popular bandpass and longpass filters. For the specific filters included in the kit, please see the presentation at the bottom of this webpage.

Storage Box
If you need a safe, convenient place to store loose filters, consider our KT01 Storage Box, a lockable foam case that holds up to ten filters. Please see below for more information.

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

Posted Comments:
user  (posted 2019-08-01 17:43:41.62)
Fluoresces orange when blue (450nm) light is incident, so it's not just "long pass" it's also "long emit."
YLohia  (posted 2019-08-02 09:38:13.0)
Hello, several of the colored glasses used for our filters are fluorescent at certain wavelengths; for more details on how this may affect certain applications, please email techsupport@thorlabs.com.
zeuner  (posted 2016-12-09 05:18:15.227)
Dear Thorlabs-Team, what is the optical density of the FGL850M? I would like to compare the specs to another filter. Best, Katharina
tfrisch  (posted 2016-12-16 10:26:08.0)
Hello, thank you for contacting Thorlabs. The blocking density is about 4-5.
u.eisenbarth  (posted 2015-03-31 17:14:01.707)
Would it be possible to have an FGL850 filter with AR-coating in the near infrared? We are working with 1054nm laser radiation and use these filters in front of cameras where visible light should be filtered. Unfortunately these filters produce strong interference effects for our laser radiation.
besembeson  (posted 2015-04-03 03:27:48.0)
Response from Bweh at Thorlabs: We will followup with you by email regarding quoting this.

Ø25 mm Mounted Longpass Filters

Item #
(Click for
Photo)
Transmission Dataa Cut-On
Wavelength
Schott®
Glass #
FGL715M info 715 nm RG715
FGL780M info 780 nm RG780
FGL850M info 850 nm RG850
FGL1000M info 1000 nm RG1000
  • Click on  for a plot and downloadable data.
Item #
(Click for
Photo)
Transmission Dataa Cut-On
Wavelength
Schott®
Glass #
FGL550M info 550 nm OG550
FGL590M info 590 nm OG590
FGL610M info 610 nm RG610
FGL665M info 665 nm RG665
Item #
(Click for
Photo)
Transmission Dataa Cut-On
Wavelength
Schott®
Glass #
FGL280M info 280 nm N-WG280
FGL400M info 400 nm GG400
FGL435M info 435 nm GG435
FGL495M info 495 nm GG495
FGL515M 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
FGL280M Support Documentation
FGL280MØ25 mm SM1-Mounted Colored Glass Filter, 280 nm Longpass
$54.38
Today
FGL400M Support Documentation
FGL400MØ25 mm SM1-Mounted Colored Glass Filter, 400 nm Longpass
$54.38
Today
FGL435M Support Documentation
FGL435MØ25 mm SM1-Mounted Colored Glass Filter, 435 nm Longpass
$54.38
Today
FGL495M Support Documentation
FGL495MØ25 mm SM1-Mounted Colored Glass Filter, 495 nm Longpass
$54.38
Today
FGL515M Support Documentation
FGL515MØ25 mm SM1-Mounted Colored Glass Filter, 515 nm Longpass
$54.38
Today
FGL550M Support Documentation
FGL550MØ25 mm SM1-Mounted Colored Glass Filter, 550 nm Longpass
$54.38
Today
FGL590M Support Documentation
FGL590MØ25 mm SM1-Mounted Colored Glass Filter, 590 nm Longpass
$54.38
Today
FGL610M Support Documentation
FGL610MØ25 mm SM1-Mounted Colored Glass Filter, 610 nm Longpass
$81.43
Today
FGL665M Support Documentation
FGL665MØ25 mm SM1-Mounted Colored Glass Filter, 665 nm Longpass
$81.43
Today
FGL715M Support Documentation
FGL715MØ25 mm SM1-Mounted Colored Glass Filter, 715 nm Longpass
$60.06
Today
FGL780M Support Documentation
FGL780MØ25 mm SM1-Mounted Colored Glass Filter, 780 nm Longpass
$60.06
Today
FGL850M Support Documentation
FGL850MØ25 mm SM1-Mounted Colored Glass Filter, 850 nm Longpass
$71.42
Today
FGL1000M Support Documentation
FGL1000MØ25 mm SM1-Mounted Colored Glass Filter, 1000 nm Longpass
$54.38
Today

Colored Filter Kit

FGK01 Contents Bandpass Region
or Cut-On Wavelength
FGS900M 315 - 710 nm
FGB37M 335 - 610 nm
FGUVM 325 - 385 nm
FGL400M 400 nm
FGL495M 495 nm
FGL550M 550 nm
FGL610M 610 nm
FGL715M 715 nm
FGL780M 780 nm
FGL850M 850 nm

The FGK01 Colored Glass Filter Kit contains ten of our most popular Ø25 mm round colored glass filters: three from our bandpass family, and seven from our longpass family. They 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. To purchase an unlabeled storage box separately, please see below.

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

Filter Storage Box

If you purchase individual filters and would like to have a safe, convenient place to store them when not in use, consider our KT01 Storage Box. The KT01 is designed to hold up to ten mounted Ø25 mm round 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
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