Glan-Thompson Polarizer
Calcite is a naturally occurring birefringent crystal. By precisely controlling internal prism angles in these calcite polarizers, a very efficient linear polarizer is produced.
Meadowlark Optics offers Glan‐Thompson Polarizers, intended for precision optical instrumentation and low power laser applications. Key advantages of Glan‐ Thompson Polarizers include excellent extinction ratio performance and a broad spectral range.
Our Glan‐Thompson Polarizers are supplied in a black anodized cylindrical housing for easy mounting. The housing is marked to indicate the polarization axis of the transmitted beam. The rejected component of the beam is totally internally reflected and eventually absorbed by the anodized aluminum.
Although raw calcite material transmits down to 215 nm, the cement interface limits ultraviolet transmission. For this reason, we recommend Glan‐Thompson Polarizers for use over 320 – 2300 nm. Three antireflection coating options cover the visible to near infrared range. Uncoated Glan‐Thompson Polarizers are also available.
Key Features
Broad spectral range
Excellent extinction ratio
Wide field of view
Low wavefront distortion
Polarization Suite
Linear Polarizers
Precision Linear Polarizer
High Contrast Linear Polarizer
Ultra‐High Contrast Linear Polarizer
Glan‐Thompson Polarizer Ultra
Broadband Polarizer
MWIR Polarizer
Deep Ultraviolet Polarizer
Beamsplitting Polarizers
Wire Grid Versalight Polarizer
Wire Grid Versalight Beam Splitter
Laser Line Beamsplitting Polarizer
Broadband Beamsplitting Polarizer
Polarizing Bandpass Filter
Circular Polarizers
Dichroic Circular
Polarizer Beam Separator
SPECIFICATIONS
Material
Grade A Optical Calcite
Extinction Ratio
10,000:1 over central 2/3 of clear aperture
Reflectance (per surface, at normal incidence)
Uncoated Single layer MgF2
~ 4.5%
~ 1.5%
Beam Deviation
±3 arc min
Acceptance Angle
± 5˚
Wavelength Range
320 – 2300 nm
Recommended Safe Operating Limit
25‐30 W/cm² CW
ORDERING INFORMATION
Clear Aperture (mm)
Wavelength Range (nm)
AR Coating
Part Number
5.0
320 – 2300
None
GTP – M05
5.0
400 – 700
MgF₂
GTP – M05 – 0550
5.0
650 – 1000
MgF₂
GTP – M05 – 0825
5.0
1000 – 1500
MgF₂
GTP – M05 – 1250
8.0
320 – 2300
None
GTP – M08
8.0
400 – 700
MgF₂
GTP – M08 – 0550
8.0
650 – 1000
MgF₂
GTP – M08 – 0825
8.0
1000 – 1500
MgF₂
GTP – M08 – 1250
10.0
320 – 2300
None
GTP – M10
10.0
400 – 700
MgF₂
GTP – M10 – 0550
10.0
650 – 1000
MgF₂
GTP – M10 – 0825
10.0
1000 – 1500
MgF₂
GTP – M10 – 1250