Create an Account  |   Log In

View All »Matching Part Numbers


Your Shopping Cart is Empty
           

Mounted Glan-Thompson Polarizers


Related Items








Mounted Glan-Thompson Polarizers

Item #GTH5M(-A)(-B)GTH10M(-A)(-B)
Extinction Ratioa100,000:1
MaterialHigh-Optical-Grade Calcite
Wavefront
Distortion
≤λ/4 Over Clear Aperture
Surface Qualityb20-10 Scratch-Dig
Wavelength Range350 nm to 2.3 µm
Aperture5 mm x 5 mm10 mm x 10 mm
Dimensions
A21.6 mm36.6 mm
B12.7 mm25.4 mm
  • The extinction ratio (ER) is the ratio of the maximum transmission of a linear polarized signal when the polarizer's axis is aligned with the signal to the minimum transmission when the polarizer is rotated by 90°.
  • For input and output faces. The side ports have 80-50 scratch-dig surface quality.
GT Mounted Drawing

Features

  • Wide Field of View: 40° Typical
  • High Extinction Ratio: 100,000:1
  • 350 nm to 2.3 μm Operation for Uncoated Prisms
  • AR-Coated Versions for 350 - 700 nm or 650 - 1050 nm Range
  • Highest Grade Optical Calcite
  • Cemented Prisms
  • Damage Threshold: 1 W/cm2

Thorlabs' Mounted Glan-Thompson calcite polarizers offer the widest field of view of the calcite polarizers while maintaining a high extinction ratio. The mounts consist of a black aluminum housing; unmounted versions are also available. The mounted GTH5M polarizer has a 1/2" outer diameter and can be conveniently held inside our SM05L10 lens tube. This allows the user to easily mount this polarizer to a rotation stage, such as the PRM05 Precision Rotation Mount for Ø1/2" optics. A similar option is available for the 1" outer diameter GTH10M mounted polarizer, using the SM1L20 lens tube and PRM1 precision rotation mount. Please see the Mounting tab for more details.

Both uncoated and AR coated polarizers are available. The uncoated polarizers are designed for use in the 350 nm to 2.3 μm range, while coated versions offer Ravg < 1% per surface in the 350 - 700 nm or 650 -1050 nm wavelength range. Please see the Graphs tab for coating reflectivity data.

Glan-Thompson polarizers consist of two cemented prisms made from the highest optical grade of calcite. Unpolarized light enters the polarizer, then is split at the intersection of the two crystals allowing S-polarized (e-ray) light to continue and P-polarized light (o-ray) to be absorbed by the housing. Due to the large field of view, these polarizers can be used for highly converging or diverging beams.

Note: As with all Glan-Thompson polarizers, the maximum optical intensity is limited by the cemented prism interface. For high-power applications, Thorlabs offers Glan Laser polarizers, which can handle power densities up to 500 W/cm2 (CW).

Glan Thompson Field of View Drawing

The transmission graph below shows the typical transmission of the GTH10 series of calcite Glan-Thompson polarizers, including any internal losses. The transmission is valid for linearly polarized light aligned with the mark on the housing of the polarizer. Calcite is a natural material, and thus transmission can vary significantly, particularly in the UV and IR. Consequently, the performance data shown below may vary from lot to lot and is not guaranteed.

Calcite AR Coating Reflectance
Click to Enlarge

An Excel file with Calcite AR coating data is also available.

Glan-Thompson Calcite Polarizer
Polarization-Dependent Refraction - Glan-Thompson Calcite Polarizer

Our calcite polarizers are all based on high-grade, birefringent, calcite crystals. Due to the birefringent structure of calcite, a differential delay is created between two orthogonally polarized waves traveling in the crystal. As shown in the image to the right, this birefringent structure creates a polarization-dependent refraction that effectively steers the polarization planes in two angles. While the extraordinary plane will travel straight through the crystal, the ordinary plane will exit the crystal at an angle proportional to the wavelength as well as the length of the crystal.

A calcite polarizer can be designed as either a polarization splitter/combiner or as a polarizer element that removes the angled, orthogonally polarized component of a beam. Our calcite polarizers are typically built out of two prisms, as shown in the drawing to the right. Since calcite is a soft crystal that is easily damaged, almost all of our calcite polarizers are offered in metal housings. With convenient threadings and adapters, these housings can easily be mounted into our opto-mechanical products.

Field of View
Calcite Polarizer Field of View (FOV)

Thorlabs' Calcite Polarizers
Glan-Laser PolarizersGlan-Taylor PolarizersWollaston Polarizer
Mounted Glan-Thompson Polarizers
Unmounted Glan-Thompson Polarizers
Double Glan-Taylor PolarizerBeam Displacers
lens tube mounted to PRM1
Figure 2
inserting lens tube in PRM1
Figure 1
secure polarizer's position by using spanner wrench
Figure 4
inserting polarizer in lens tube
Figure 3

Mounting the GTH10M

The GTH10M polarizer can be mounted to a PRM1 rotation mount by using a SM1L20 lens tube:

  1. Remove the retaining rings that comes with the PRM1 rotation mount and the lens tube.
  2. Screw the threaded end of the lens tube into the rotation mount as shown in Figure 1.
  3. Once the lens tube is threaded (Figure 2), insert the mounted polarizer into the other end of the lens tube (see Figure 3)
  4. Secure the polarizer into place using the retaining ring included with the lens tube.
  5. A SPW602 spanner wrench can be used to tighten the retaining ring (Figure 4).

Note: The SM1P1 Ø1" to SM1 adapter can be used in place of the SM1L20 lens tube when space is not available for the extra length of the lens tube.

Mounting the GTH5M

The GTH5M can be mounted using the directions above for the GTH10M, except substituting Ø1/2" components for the Ø1" components used for the GTH10M. The chart below lists the equivalent item numbers appropriate for mounting the GTH5M.

DescriptionGTH10M Item # From AboveEquivalent GTH5M Item #
Rotation MountPRM1PRM05
Lens TubeSM1L20SM05L10a
Spanner WrenchSPW602SPW603
  • The SM05P05 Ø1/2" to SM05 adapter can be used in place of the SM05L10 lens tube when space is not available for the extra length of the lens tube.

Polarizer Selection Guide

Thorlabs offers a diverse range of polarizers, including wire grid, film, calcite, alpha-BBO, rutile, and beamsplitting polarizers. Collectively, our line of wire grid polarizers offers coverage from the visible range to the beginning of the Far-IR range. Our nanoparticle linear film polarizers provide high thresholds for laser damage, up to 25 W/cm2, as well as extinction ratios as high as 100,000:1. Alternatively, our other film polarizers offer an affordable solution for polarizing light from the visible to the Near-IR. Next, our beamsplitting polarizers allow for use of the reflected beam, as well as the more completely polarized transmitted beam. Finally, our Alpha-BBO (UV), calcite (visible to Near-IR), and rutile (Near-IR to Mid-IR) polarizers each offer an exceptional extinction ratio of 100,000:1 within their respective wavelength ranges.

To explore the available types, wavelength ranges, extinction ratios, transmission, and available sizes for each polarizer category, click More [+] in the appropriate row below.

Wire Grid Polarizers
Polarizer TypeWavelength RangeExtinction RatioTransmissionaAvailable Sizes
Wire Grid Polarizers on Glass Substrates420 nm - 700 nm>800:112.5 mm x 12.5 mm, Ø25.0 mmb,
25.0 mm x 25.0 mm,
and 50.0 mm x 50.0 mm
250 nm - 4 µm>10:1 from 250 nm - 4 µm
>100:1 from 300 nm - 4 µm
>1000:1 from 600 nm - 4 µm
>10,000:1 from 2.25 µm - 4 µm
12.5 mm x 12.5 mm, Ø25.0 mmb,
25.0 mm x 25.0 mm,
and 50.0 mm x 50.0 mm
Holographic Wire Grid Polarizers2 µm - 12 µm150:1 at 3 µm
300:1 at 10 µm
Ø25.0 mmb and Ø50.0 mmb
2 µm - 9 µm150:1 at 3 µm
300:1 at 8 µm
2 µm - 30 µm150:1 at 3 µm
300:1 at 15 µm
2 µm - 18 µm150:1 at 3 µm
300:1 at 10 µm
MIR Wire Grid Polarizers on Silicon Substrates3 µm - 5 µm>1000:112.5 mm x 12.5 mmb, Ø25.0 mmb,
25.0 mm x 25.0 mmb,
and 50.0 mm x 50.0 mmb
7 µm - 15 µm>10,000:112.5 mm x 12.5 mmb, Ø25.0 mmb,
25.0 mm x 25.0 mmb,
and 50.0 mm x 50.0 mmb
Film Polarizers
Polarizer TypeWavelength RangeExtinction RatioTransmissionaAvailable Sizes
Nanoparticle Linear Film Polarizers365 nm - 395 nm>1000:1 from 365 nm - 395 nm
>10,000:1 from 369 nm - 390 nm
>100,000:1 from 372 nm - 388 nm
Ø12.5 mmc and Ø25.0 mmd
480 nm - 550 nm>10,000:1 from 480 nm - 550 nmØ12.5 mmc and Ø25.0 mmd
500 nm - 720 nm>10,000:1 from 500 nm - 720 nmØ12.5 mmc and Ø25.0 mmd
550 nm - 1500 nm>10,000:1 from 550 nm - 1500 nm
>100,000:1 from 600 nm - 1200 nm
Ø12.5 mmc and Ø25.0 mmd
650 nm - 2000 nm>1000:1 from 650 nm - 2000 nm
>10,000:1 from 750 nm - 1800 nm
>100,000:1 from 850 nm - 1600 nm
Ø12.5 mmc and Ø25.0 mmd
1 µm - 3 µm>1000:1 from 1 µm - 3 µm
>10,000:1 from 1.2 µm - 3 µm
Ø12.5 mmc and Ø25.0 mmd
1.5 µm - 5 µm>1000:1 from 1.5 µm - 5 µm
>10,000:1 from 2 µm - 4.5 µm
Ø12.5 mmc and Ø25.0 mmd
Economy Film Polarizers400 nm - 700 nm>100:1 from 400 nm - 500 nm
>1000:1 from 500 nm - 700 nm
>5000:1 from 530 nm - 690 nm
2" x 2"
Economy Laminated Film Polarizers400 nm - 700 nm>100:1 from 400 nm - 500 nm
>1000:1 from 500 nm - 700 nm
>5000:1 from 530 nm - 690 nm
Ø1/2", Ø1", and Ø2"
600 nm - 1100 nm>1000:1 from 600 nm - 950 nm
>400:1 from 600 nm - 1100 nm
Ø1/2", Ø1", and Ø2"
1100 nm - 1630 nm>5000:1 from 1300 nm - 1400 nm
>1000:1 from 1260 nm - 1480 nm
>100:1 from 1100 nm - 1630 nm
Ø1/2", Ø1", Ø2"
Beamsplitting Polarizers
Polarizer TypeWavelength RangeExtinction RatioTransmissionaAvailable Sizes
Polarizing Plate Beamsplitters532 nm10,000:1Ø1"
633 nm
780 nm
808 nm
1064 nm
1550 nm
Broadband Polarizing Beamsplitter Cubes
(Unmounted, 16 mm Cage Cube, or 30 mm Cage Cube)
420 nm - 680 nm1000:15 mm, 10 mm, 1/2", 20 mme, and 1"e
620 nm - 1000 nm
900 nm - 1300 nm
1200 nm - 1600 nm
Laser-Line Polarizing Beamsplitter Cubes
(Unmounted or 30 mm Cage Cube)
532 nm3000:11"e
633 nm
780 nm
980 nm
1064 nm
1550 nm
High-Power Laser-Line Polarizing Beamsplitter Cubes
(Unmounted or 30 mm Cage Cube)
405 nm2000:11"e
532 nm
780 - 808 nm
1064 nm
alpha-BBO Polarizers
Polarizer TypeWavelength RangeExtinction RatioTransmissionaAvailable Sizes
alpha-BBO Glan-Laser Polarizers210 nm - 450 nm100,000:15 mmb and 10 mmb
(Clear Aperture, Square)
220 nm - 370 nm
405 nm
Calcite Polarizers
Polarizer TypeWavelength RangeExtinction RatioTransmissiona,gAvailable Sizes
Glan-Laser Calcite Polarizers350 nmf - 2.3 µm (Uncoated)100,000:15 mmb, 10 mmi, and 15 mmb
(Clear Aperture, Square)
350 nmf - 700 nm (A Coated)
650 nm - 1050 nm (B Coated)
1050 nm - 1700 nm (C Coated)
1064 nm (V Coated)h
Glan-Taylor Calcite Polarizers350 nmf - 2.3 µm (Uncoated)5 mmb, 10 mmb, and 15 mmb
(Clear Aperture, Square)
350 nmf - 700 nm (A Coated)
650 nm - 1050 nm (B Coated)
1050 nm - 1700 nm (C Coated)
Glan-Thompson Calcite Polarizers
(Unmounted or Mounted)
350 nmf - 2.3 µm (Uncoated)5 mmi and 10 mmi
(Clear Aperture, Square)
350 nmf - 700 nm (A Coated)
650 nm - 1050 nm (B Coated)
Double Glan-Taylor Calcite Polarizers350 nmf - 2.3 µm (Uncoated)9 mmb
(Clear Aperture, Square)
Calcite Beam Displacers350 nmf - 2.3 µm (Uncoated)10 mmb
(Clear Aperture, Square)
Wollaston Prism Polarizers350 nmf - 2.3 µm (Uncoated)10 mmi
(Clear Aperture, Square)
350 nmf - 700 nm (A Coated)
650 nm - 1050 nm (B Coated)
Rutile Polarizers
Polarizer TypeWavelength RangeExtinction RatioTransmissionaAvailable Sizes
Rutile TiO2 Polarizers2.2 µm - 4 µm100,000:19.1 mm x 9.5 mm x 9.5 mmb and
10.7 mm x 15.9 mm x 15.9 mmb
  • Click on the graph icons in this column to view a transmission curve for the corresponding polarizer. Each curve represents one substrate sample or coating run and is not guaranteed.
  • Mounted in a protective box, unthreaded ring, or cylinder that indicates the polarization axis.
  • Available unmounted or in an SM05-threaded (0.535"-40) mount that indicates the polarization axis.
  • Available unmounted or in an SM1-threaded (1.035"-40) mount that indicates the polarization axis.
  • Available unmounted or mounted in cubes for cage system compatibility.
  • Calcite's transmittance of light near 350 nm is typically around 75% (see Transmission column).
  • The transmission curves for calcite are valid for linearly polarized light with a polarization axis aligned with the mark on the polarizer's housing.
  • The 1064 nm V coating corresponds to a -C26 suffix in the item number.
  • Available unmounted or mounted in a protective box or unthreaded cylinder that indicates the polarization axis.
Loading Tag Cloud Loading...

Please Give Us Your Feedback
 
Email   Feedback On
(Optional)
Contact Me:
Your email address will NOT be displayed.
 
 
Please type the following key into the field to submit this form:
Click Here if you can not read the security code.
This code is to prevent automated spamming of our site
Thank you for your understanding.
  
 
Would this product be useful to you?       Little Use   1 2 3 4Very Useful

Enter Comments Below:
 
Characters remaining 8000    
Posted Comments:
Poster: jchristopheris
Posted Date: 2014-02-16 13:35:36.653
I'm using the GTH10M as a clean up polarizer on a linearly polarized laser source (Argon Ion at 514.5nm). If I measure the power of the laser after passing through the GTH10M as a function of angle there are two maxima separated by ~180 degrees as expected. However, the maxima are not the same size, which surprised me. Is there a specification for how large this effect is and how I would account for it using Jone's matrices?
Poster: jlow
Posted Date: 2014-02-25 05:27:51.0
Response from Jeremy at Thorlabs: This could possibly be caused by a slight misalignment or variation within our manufacturing tolerances. I will contact you to find out more about how much the difference is and how you have this setup to determine the cause.
Poster: tcohen
Posted Date: 2012-11-22 12:19:00.0
Response from Tim at Thorlabs: A simple mounting solution would be to hold it inside an SM05L10 lens tube. This can be rotated in, for example, the PRM05 in a way analogous to the solution for the GTH10M detailed on the “Mounting” tab.
Poster: julienarmijo
Posted Date: 2012-11-16 10:42:07.343
Hello. I would like to know what mounting solution is best recommended for the GTH5M. Shold we use a lens tube like you recommend to do for the GTH10M ?
Poster: bdada
Posted Date: 2011-12-14 11:40:00.0
Response from Buki at Thorlabs: Thank you for using our Feedback tool. The extinction ratio is 100,000:1. This information is included in a data table in the "Overview" tab of the product page: http://www.thorlabs.de/NewGroupPage9.cfm?ObjectGroup_ID=5707&pn=GTH10M-B#5710 Please contact TechSupport@thorlabs.com if you have any questions.
Poster: luis-jose.salazar
Posted Date: 2011-12-13 17:41:58.0
A important parameter to know is the extinction ratio. What is the value for the GTH10MB polarizer??? Thanks...
Click on any phrase below to search our site using our new Search Engine:
10mmx10mm   AR coated polarizer   calcite   calcite polarizer   calcite polarizer glan thomson glan thompson   glan   glan thompson   glan Thompson 10mm aperture   ir optics   ir polarizer   linear polarizers   nir linear polarizers   nir polarizer   polarization   polarizer   polarizor   uv polarizer   vis polarizer   visible optics  
Mounted Glan-Thompson Polarizers, Uncoated
Based on your currency / country selection, your order will ship from Newton, New Jersey  
+1 Qty Docs Part Number - Universal/Imperial Price Available / Ships
GTH5M Support Documentation
GTH5M Mounted Glan-Thompson Calcite Polarizer, 5 mm x 5 mm Clear Aperture
$417.90
Today
GTH10M Support Documentation
GTH10M Mounted Glan-Thompson Calcite Polarizer, 10 mm x 10 mm Clear Aperture
$538.65
Today
Mounted Glan-Thompson Polarizers, 350 - 700 nm AR Coating
Based on your currency / country selection, your order will ship from Newton, New Jersey  
+1 Qty Docs Part Number - Universal/Imperial Price Available / Ships
GTH5M-A Support Documentation
GTH5M-A Mounted Glan-Thompson Calcite Polarizer, 5 mm x 5 mm Clear Aperture, 350 - 700 nm AR Coating
$452.03
Today
GTH10M-A Support Documentation
GTH10M-A Mounted Glan-Thompson Calcite Polarizer, 10 mm x 10 mm Clear Aperture, 350 - 700 nm AR Coating
$572.78
Today
Mounted Glan-Thompson Polarizers, 650 - 1050 nm AR Coating
Based on your currency / country selection, your order will ship from Newton, New Jersey  
+1 Qty Docs Part Number - Universal/Imperial Price Available / Ships
GTH5M-B Support Documentation
GTH5M-B Mounted Glan-Thompson Calcite Polarizer, 5 mm x 5 mm Clear Aperture, 650 - 1050 nm AR Coating
$452.03
Today
GTH10M-B Support Documentation
GTH10M-B Mounted Glan-Thompson Calcite Polarizer, 10 mm x 10 mm Clear Aperture, 650 - 1050 nm AR Coating
$572.78
Today
Log In   |   My Account  |   Contact Us  |   Privacy Policy  |   Home  |   Site Index
Regional Websites: West Coast US | Europe | Asia | China | Japan
Copyright 1999-2014 Thorlabs, Inc.
Sales: 1-973-579-7227
Technical Support: 1-973-300-3000


High Quality Thorlabs Logo 1000px: Save this Image