Products Home / Optical Elements / Optical Filters / Colored Glass Filters / Mounted Longpass Colored Glass FiltersMounted 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
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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 @ 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; 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. |
- Compatible with Filter Mounts or Lens Tubes
- Fabricated from 2 mm Thick Schott® Colored Glass
| Item # (Click for Photo) |
Transmission Dataa | Cut-On Wavelength |
Schott® Glass # |
|---|---|---|---|
| FGL715M |  |
715 nm | RG715 |
| FGL780M | |
780 nm | RG780 |
| FGL830M | |
830 nm | RG830 |
| FGL850M | |
850 nm | RG850 |
| FGL1000M | |
1000 nm | RG1000 |
- Click on for a plot and downloadable data.
Zoom| 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.
ZoomIf 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.
Mounted Longpass Colored Glass Filters
