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Dichroic Filters


  • Will Not Fade Like Gels or Plastic Filters
  • Multilayer Thin Film Coating on Glass Substrates
  • Also Available in Kits

FD1M

FD1Y

FD1C

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Dichroic filters can be used with a white LED array to selectively illuminate a sample with a particular color.

Features

  • Multilayer Thin Film Coating on Glass Substrates
  • Will Not Fade Like Gels or Plastic Filters
  • Ø1" Unmounted Filters Sold Individually
  • Mounted Filters Available in a Kit

Thorlabs offers high-quality Additive and Subtractive Dichroic Filters with a strong emphasis on durability. Unlike plastic filters or gels, these coatings will not fade with time and can handle much higher temperatures. Our dichroic color filters can be mounted in our Ø1" lens tubes or filter mounts.

Additive and Subtractive Dichroic filters are used to separate color in CCD imaging, digital projection, machine vision, and printing. These filters allow only a portion of the visible spectrum to pass and reject (reflect) the rest.

In the simplest case, using the Red, Green, and Blue additive filters in succession with a black and white CCD camera, a high-contrast color image may be achieved. Unlike the traditional color CCD, which uses groups of three spatially separated pixels to achieve this effect, using filters maintains the resolution of the camera. In digital projection, additive filters are used to enhance contrast. In machine vision, a single filter can be placed before the CCD camera to increase contrast, which makes sorting items much simpler. Often, copy machines and print preprocessing centers use subtractive filters to make the images that will later be printed in ink.

General Specifications
Angle of Incidence
MaterialBorofloat Glass
Surface Quality (Scratch-Dig)80/50 MIL-0-13830A
Clear Aperture>90% Diameter
Temperature Range-50 to +80 oC
DiameterØ25.4 mm +0/-0.25 mm
Thickness2 mm +0.2/-0.5 mm
Individual Filter Specifications
Additive FiltersSubtractive Filters
RED
Transmission:
>75% avg. for 615-730 nm
<1% avg. for 380-550 nm
Cut-on: 585 ± 15 nm
CYAN
Transmission:
>85% avg. for 390-530 nm
<1% avg. for 585-710 nm
Cut-off: 555 ± 15 nm
GREEN
Transmission:
>70% @ peak
<1% avg. for 400-460 nm
Low Edge: 505 ± 15 nm
High Edge: 575 ± 15 nm
MAGENTA
Transmission:
>75% avg. for 395-440 nm
and 645-750 nm
<1% avg. for 500-590 nm
BLUE
Transmission:
>85% avg. for 390-480 nm
<1% avg. for 540-750 nm
Cut-off: 505 ± 15 nm
YELLOW
Transmission:
>85% avg. for 550-750 nm
<1% avg. for 410-475 nm
Cut-on: 515 ± 15 nm

Below are plots showing the percent transmission versus wavelength of our dichroic filters for four different angles of incidence (AOI). Please note that for clarity reasons we have only plotted data for four different AOIs. You can obtain raw data in 5o increments (i.e., at 0o, 5o, 10o, 15o, 20o, 25o, 30o, 35o, 40o, and 45o) by clicking on the link below the graph.




Posted Comments:
mss2257  (posted 2018-05-03 15:12:47.343)
Hi, I was wondering if more details could be obtained about the engineering of the dichroic filter? I plan on using this as a substrate in a reflectance experiment, and I would like to know the thicknesses of the optical materials deposited, and their refractive indeces, for calculation purposes.
YLohia  (posted 2018-05-08 08:40:52.0)
Hello, thank you for contacting Thorlabs. Unfortunately, we cannot share the thickness of coatings or their indices of refraction since that information is proprietary.
user  (posted 2015-04-07 05:56:40.03)
Is it possible to obtain transmission data above 800nm at AOI = 0° for the red, green and blue dichroic filters ?
jlow  (posted 2015-04-14 09:43:01.0)
Response from Jeremy at Thorlabs: We can provide more information about this. Since you did not leave your contact info, can you contact us at techsupport@thorlabs.com about this please?
Greg  (posted 2009-02-05 08:22:43.0)
A response from Greg at Thorlabs to acable: Our dichroic filter sets do not currently include a storage box.
acable  (posted 2008-12-15 16:11:58.0)
Does the kit come with a storage box to organize the optics.
Laurie  (posted 2008-10-01 16:16:10.0)
Response from Laurie at Thorlabs to cpontbriand: We have just added information to our website (see the Graphs Tab) showing transmission vs. wavelength for our dichroic filters at various incident angles. I apologize that it took so long to add this information, but our coating department needed to collect this data as the information was not on file. If you have any additional questions, please feel free to contact us.
cpontbriand  (posted 2008-09-02 11:48:51.0)
To Whom it may concern, I see that your dichroic filters have applications in imaging and illumination, but the stated angle of incidence is 0 degrees. There must be some tolerance about 0 degrees, given the stated applications. What sort of useable angle of incidence should I expect to get from these filters? Thank you, Clifford Pontbriand Engineer Woods Hole Oceanographic Institution

Ø1" Dichroic Filters (Unmounted)

Based on your currency / country selection, your order will ship from Newton, New Jersey  
+1 Qty Docs Part Number - Universal Price Available / Ships
FD1B Support Documentation
FD1BØ1" Additive Dichroic Color Filter, Blue
$25.40
Today
FD1G Support Documentation
FD1GØ1" Additive Dichroic Color Filter, Green
$25.40
Today
FD1R Support Documentation
FD1RØ1" Additive Dichroic Color Filter, Red
$25.40
Today
FD1C Support Documentation
FD1CØ1" Subtractive Dichroic Color Filter, Cyan
$25.40
Today
FD1M Support Documentation
FD1MØ1" Subtractive Dichroic Color Filter, Magenta
$25.40
Today
FD1Y Support Documentation
FD1YØ1" Subtractive Dichroic Color Filter, Yellow
$25.40
Today

Dichroic Filter Set (Mounted)

The FD1D Dichroic Filter Set includes one of each of our Red, Green, and Blue Additive Filters as well as one of each of our Cyan, Magenta, and Yellow subtractive filters, each housed in an SM1-Compatible housing engraved with the part number.

Item #Included Filters
FD1DFD1R, FD1G, FD1B, FD1C, FD1M, and FD1Y
Based on your currency / country selection, your order will ship from Newton, New Jersey  
+1 Qty Docs Part Number - Universal Price Available / Ships
FD1D Support Documentation
FD1DDichroic Color Filter Kit, Complete Set of 6 Ø1" Filters
$202.98
Today
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