Glan Thompson Polarizers

Glan Thompson polarizer is made of two calcite prisms or α-BBO prisms cemented together. Two types of Glan Thompsons are available. One is the standard form and the other is the long form. Their length to aperture ratios are 2.5 : 1 and 3.0 : 1 respectively. Glan Thompsons tend to have higher extinction ratio than air spaced polarizers. In the ultra violet spectrum, their transmission is limited by absorption in birefriengent materials as well as the cement layer. α-BBO polarizers and Calcite polarizers can be used from about 190 to 900nm and 350 to 2300 nm respectively.

The polarizers have the widest field angle of any design. The standard form of this polarizer with 2.5:1 length to aperture ratio has a full acceptance cone angle of more than 15 ° @ 589nm, symmetric about the input axis, whilst the long form with 3:1 ratio has a field angle >26 ° . The polarized field F1 and F2 of all these is shown in the plot below.

Specifications:

Material:	α-BBO, Calcite
Wavelength Range:	α-BBO: 190-1100 nm, Calcite: 350-2300 nm
Extinction Ratio:	Calcite:<5x10 ^-5 ; a -BBO:<5x10 ^-6
Parallelism:	< 2"
Surface Quality:	20-10
Beam Deviation:	Typical: <3', High Precision: <3"
Flatness:	λ/4@633nm
Damage Threshold:	>200 MW/cm ²
Coating:	Single MgF₂
Mount:	Black Anodized Aluminium

Standard Products

1. a -BBO Glan Thompson Polarizer(Special for DUV, Visible and NIR(200-1100nm)

Part No.	L/CA	Extinction Ratio	Angular Field(°)	C.A. Φ a (mm)	O.D. Φ d (mm)	L±0.1(mm)
GMP6006	1.6	<5x10^-6	>15°	5	15	14
GMP6008				7	25.4	17
GMP6010				9	25.4	21
GMP6012				11.4	25.4	26
GMP6015				13.5	30	31
GMP6020				18	38	40

Note: "RFQ" stands for "Request For Quoting".

2. Calcite Glan Thompson Polarizer

Part No.	L/CA	Extinction Ratio	Angular Field(°)	C.A. Φ a (mm)	O.D. Φ d (mm)	L±0.1(mm)
GMP7106	2.5	<5x10 ^-6	14°-16°	5	15	18
GMP7108				7	25.4	23
GMP7110				9	25.4	28
GMP7112				11.4	25.4	35
GMP7115				13.5	30	41
GMP7206	3	<5x10^-6	25°-28°	5	15	21
GMP7208				7	25.4	27
GMP7210				9	25.4	33
GMP7212				11.4	25.4	41
GMP7215				13.5	30	48

Note: Price list is for quantity <= 5pcs .

Call for OEM quantity pricing and Custom Design Polarizer.

High Transmission Glan Laser Polarizers Broadband DUV Polarizer (190-3300nm)

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