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


Please Wait
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 @ 632.8 nm
Parallelism <3 arcmin

Features

  • Longpass Cut-On Wavelengths from 280 to 1000 nm
  • Ø25 mm Filters
  • Transmissive Up to At Least 1800 nm
  • SM1-Threaded Mounts, 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; please consider our fluorescence imaging filters if your application is sensitive to fluorescent signals. 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 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.
Back to Top

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
FGL830M info 830 nm RG830
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
FGL570M info 570 nm OG570
FGL590M info 590 nm OG590
FGL610M info 610 nm RG610
FGL630M info 630 nm RG630
FGL645M info 645 nm RG645
FGL665M info 665 nm RG665
FGL695M info 695 nm RG695
Item #
(Click for
Photo)		 Transmission Dataa Cut-On
Wavelength		 Schott®
Glass #
FGL280M info 280 nm N-WG280
FGL400M info 400 nm GG400
FGL420M info 420 nm GG420
FGL435M info 435 nm GG435
FGL455M info 455 nm GG455
FGL495M info 495 nm GG495
FGL515M info 515 nm OG515
FGL530M 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
FGL280M Support Documentation
FGL280MØ25 mm N-WG280 Colored Glass Filter, SM1-Threaded Mount, 280 nm Longpass
$62.12
3-5 Days
FGL400M Support Documentation
FGL400MØ25 mm GG400 Colored Glass Filter, SM1-Threaded Mount, 400 nm Longpass
$62.12
3-5 Days
FGL420M Support Documentation
FGL420MCustomer Inspired! Ø25 mm GG420 Colored Glass Filter, SM1-Threaded Mount, 420 nm Longpass
$55.69
3-5 Days
FGL435M Support Documentation
FGL435MØ25 mm GG435 Colored Glass Filter, SM1-Threaded Mount, 435 nm Longpass
$62.12
3-5 Days
FGL455M Support Documentation
FGL455MCustomer Inspired! Ø25 mm GG455 Colored Glass Filter, SM1-Threaded Mount, 455 nm Longpass
$55.69
3-5 Days
FGL495M Support Documentation
FGL495MØ25 mm GG495 Colored Glass Filter, SM1-Threaded Mount, 495 nm Longpass
$62.12
3-5 Days
FGL515M Support Documentation
FGL515MØ25 mm OG515 Colored Glass Filter, SM1-Threaded Mount, 515 nm Longpass
$62.12
3-5 Days
FGL530M Support Documentation
FGL530MCustomer Inspired! Ø25 mm OG530 Colored Glass Filter, SM1-Threaded Mount, 530 nm Longpass
$55.69
3-5 Days
FGL550M Support Documentation
FGL550MØ25 mm OG550 Colored Glass Filter, SM1-Threaded Mount, 550 nm Longpass
$62.12
3-5 Days
FGL570M Support Documentation
FGL570MCustomer Inspired! Ø25 mm OG570 Colored Glass Filter, SM1-Threaded Mount, 570 nm Longpass
$55.69
3-5 Days
FGL590M Support Documentation
FGL590MØ25 mm OG590 Colored Glass Filter, SM1-Threaded Mount, 590 nm Longpass
$62.12
3-5 Days
FGL610M Support Documentation
FGL610MØ25 mm RG610 Colored Glass Filter, SM1-Threaded Mount, 610 nm Longpass
$92.11
3-5 Days
FGL630M Support Documentation
FGL630MCustomer Inspired! Ø25 mm RG630 Colored Glass Filter, SM1-Threaded Mount, 630 nm Longpass
$55.69
3-5 Days
FGL645M Support Documentation
FGL645MCustomer Inspired! Ø25 mm RG645 Colored Glass Filter, SM1-Threaded Mount, 645 nm Longpass
$55.69
3-5 Days
FGL665M Support Documentation
FGL665MØ25 mm RG665 Colored Glass Filter, SM1-Threaded Mount, 665 nm Longpass
$92.11
3-5 Days
FGL695M Support Documentation
FGL695MCustomer Inspired! Ø25 mm RG695 Colored Glass Filter, SM1-Threaded Mount, 695 nm Longpass
$55.69
3-5 Days
FGL715M Support Documentation
FGL715MØ25 mm RG715 Colored Glass Filter, SM1-Threaded Mount, 715 nm Longpass
$68.54
3-5 Days
FGL780M Support Documentation
FGL780MØ25 mm RG780 Colored Glass Filter, SM1-Threaded Mount, 780 nm Longpass
$68.54
3-5 Days
FGL830M Support Documentation
FGL830MCustomer Inspired! Ø25 mm RG830 Colored Glass Filter, SM1-Threaded Mount, 830 nm Longpass
$55.69
3-5 Days
FGL850M Support Documentation
FGL850MØ25 mm RG850 Colored Glass Filter, SM1-Threaded Mount, 850 nm Longpass
$80.33
3-5 Days
FGL1000M Support Documentation
FGL1000MØ25 mm RG1000 Colored Glass Filter, SM1-Threaded Mount, 1000 nm Longpass
$62.12
3-5 Days
Back to Top

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
FGK01 Filter Kit Contents
Click to Enlarge

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
$526.93
3-5 Days
Back to Top

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)
$105.13
3-5 Days
Additional Colored Glass Filters
  • Unmounted Bandpass Colored Glass Filters

  • Mounted Bandpass Colored Glass Filters

  • Bandpass Colored Glass Filters (AR Coated)

  • Unmounted Longpass Colored Glass Filters

  • Mounted Longpass Colored Glass Filters

  • Color-Balancing Filters

  • Colored Filter Kits