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Transparent optical plates made by birefringent materials that are mostly used for altering the polarization state of light beams by retarding one polarization component. Learn More

Product	Retardance	Clear Aperture	Wavelength Range	Availability	Price (USD)
Achromatic Quarter Waveplate	-	10.1 mm (0.4")	400 - 1800 nm (Center Wavelength)	1 - 2 days	$ 919.00
Product Code Wavelength Range 400 - 1800 nm (Center Wavelength) Center Wavelength 400 - 1800 nm (Specify at Checkout) Thickness 6.35 mm (0.25") Clear Aperture 10.1 mm (0.4") Damage Threshold Pulsed 4 J/cm² (20 ns, 1064 nm) 0.6 J/cm² (20 ns) Substrate N-BK7 Mount Non-Threaded Mount Surface Quality 40-20 scratch-dig Transmitted Wavefront Error < λ/4 Beam Deviation < 1' Key Features Broad Spectral Range Superior Field of View Thermally Stable Retarder Material Polymer Retardance Accuracy < λ/100 Damage Threshold CW 0.5 kW/cm² Operating Temperature 20 - 50 °C Supplier Location Colorado, USA See product details More from Meadowlark
Achromatic Quarter Waveplate	λ/4, λ/2	> 10.16 mm (0.4")	1190 - 1660 nm	Contact Supplier	Add to cart to request quote
Product Code Wavelength Range 1190 - 1660 nm Center Wavelength 1190 - 1660 nm Reflectance < 0.5% (Normal Incidence, per Surface) Retardance λ/4, λ/2 Clear Aperture > 10.16 mm (0.4") Mount Non-Threaded Mount Surface Quality 40-20 scratch-dig Transmitted Wavefront Error < λ/4 Beam Deviation < 1' Key Features High Power Handling Retarder Material Magnesium Fluoride Quartz Supplier Location Colorado, USA See product details More from Meadowlark
Achromatic Quarter Waveplate	λ/4	> 27 mm	340 - 560 nm	In stock	$ 3215.00
Product Code Wavelength Range 340 - 560 nm Coating BBAR (340 - 560 nm) Reflectance < 0.75% (340 - 560 nm, Average) Diameter 50.8 mm (2") Dimensions Ø 50.8 mm (2") Thickness 6 mm Parallelism < 10'' Retardance λ/4 Clear Aperture > 27 mm Damage Threshold Pulsed > 5 J/cm² (10 ns, 10 Hz, 1064 nm) Substrate Crystalline Quartz Magnesium Fluoride Shape Round Surface Quality 40-20 scratch-dig Transmitted Wavefront Error < λ/4 (632 nm, P-V) Thickness Tolerance ±0.2 mm Coating Features Broadband Supplier Location New Jersey, USA See product details More from Edmund Optics
Achromatic Quarter Waveplate	λ/4	Ø 17 mm	448 nm	Contact Supplier	$ 152.00
Product Code Wavelength Range 448 nm Center Wavelength 448 nm Reflectance < 0.4% Diameter 20 mm Dimensions Ø 20 mm Parallelism < 10'' Retardance λ/4 Clear Aperture Ø 17 mm Damage Threshold Pulsed 10 J/cm² (10 ns, 1064 nm) Substrate Single Crystal Quartz Mount Non-Threaded Mount, 25.4 mm Shape Round Supplier Location Lithuania See product details More from EKSMA Optics
Achromatic Quarter Waveplate	λ/4	Ø 17 mm	1550 nm	Contact Supplier	$ 152.00
Product Code Wavelength Range 1550 nm Center Wavelength 1550 nm Reflectance < 0.4% Diameter 20 mm Dimensions Ø 20 mm Parallelism < 10'' Retardance λ/4 Clear Aperture Ø 17 mm Damage Threshold Pulsed 10 J/cm² (10 ns, 1064 nm) Substrate Single Crystal Quartz Mount Non-Threaded Mount, 25.4 mm Shape Round Supplier Location Lithuania See product details More from EKSMA Optics
Achromatic Quarter Waveplate	λ/4	-	700 - 1100 nm	In stock	$ 675.00
Product Code Wavelength Range 700 - 1100 nm Reflectance < 0.75% (700 - 1100 nm, per Surface) Diameter 25.4 mm (1") Dimensions Ø 25.4 mm (1") Thickness 0.55 mm Retardance λ/4 Damage Threshold Pulsed 0.3 J/cm², 2 J/cm² (10 ns, 20 ns, 0.5 kW/cm², 532 nm, 1064 nm) Substrate Polymer Shape Round Surface Quality 60-40 scratch-dig Operating Temperature -20 to 40 °C Angle of Incidence 0 - 10° Diameter Tolerance ±0.15 mm Supplier Location New Jersey, USA See product details More from Edmund Optics
Achromatic Quarter Waveplate	λ/4, λ/2	> 10.16 mm (0.4")	412 - 475 nm	Contact Supplier	Add to cart to request quote
Product Code Wavelength Range 412 - 475 nm Center Wavelength 412 - 475 nm Reflectance < 0.5% (Normal Incidence, per Surface) Retardance λ/4, λ/2 Clear Aperture > 10.16 mm (0.4") Mount Unmounted Surface Quality 40-20 scratch-dig Transmitted Wavefront Error < λ/4 Beam Deviation < 1' Key Features High Power Handling Retarder Material Magnesium Fluoride Quartz Supplier Location Colorado, USA See product details More from Meadowlark
Achromatic Quarter Waveplate	λ/4	Ø 11 mm	1064 nm	4 - 5 days	$ 182.00
Product Code Wavelength Range 1064 nm Center Wavelength 1064 nm Reflectance < 0.4% Diameter 12.7 mm (0.5") Dimensions Ø 12.7 mm (0.5") Thickness 1.5 - 2.5 mm Parallelism < 10'' Retardance λ/4 Clear Aperture Ø 11 mm Damage Threshold Pulsed > 0.5 J/cm² (10 ns, 1064 nm) Substrate Single Crystal Quartz Mount Unmounted Shape Round Waveplate Order Order 0 Supplier Location Lithuania See product details More from EKSMA Optics
Achromatic Quarter Waveplate	λ/4	Ø 17 mm	589 nm	4 - 5 days	$ 152.00
Product Code Wavelength Range 589 nm Center Wavelength 589 nm Reflectance < 0.4% Diameter 20 mm Dimensions Ø 20 mm Parallelism < 10'' Retardance λ/4 Clear Aperture Ø 17 mm Damage Threshold Pulsed 10 J/cm² (10 ns, 1064 nm) Substrate Single Crystal Quartz Mount Non-Threaded Mount, 25.4 mm Shape Round Supplier Location Lithuania See product details More from EKSMA Optics
Achromatic Quarter Waveplate	λ/4	40.64 mm (1.6")	400 - 1800 nm (Center Wavelength)	1 - 2 days	$ 3025.00
Product Code Wavelength Range 400 - 1800 nm (Center Wavelength) Center Wavelength 400 - 1800 nm (Specify at Checkout) Thickness 12.7 mm (0.5") Retardance λ/4 Clear Aperture 40.64 mm (1.6") Damage Threshold Pulsed 4 J/cm² (20 ns, 1064 nm) 0.6 J/cm² (20 ns) Substrate N-BK7 Mount Unmounted Surface Quality 40-20 scratch-dig Transmitted Wavefront Error < λ/4 Beam Deviation < 1' Key Features Broad Spectral Range Superior Field of View Thermally Stable Retarder Material Polymer Retardance Accuracy < λ/100 Damage Threshold CW 0.5 kW/cm² Operating Temperature 20 - 50 °C Supplier Location Colorado, USA See product details More from Meadowlark
Achromatic Quarter Waveplate	λ/4, λ/2	> 10.16 mm (0.4")	690 - 2050 nm	Contact Supplier	Add to cart to request quote
Product Code Wavelength Range 690 - 2050 nm Center Wavelength 690 - 2050 nm Reflectance < 0.5% (Normal Incidence, per Surface) Retardance λ/4, λ/2 Clear Aperture > 10.16 mm (0.4") Mount Unmounted Surface Quality 40-20 scratch-dig Transmitted Wavefront Error < λ/4 Beam Deviation < 1' Key Features High Power Handling Retarder Material Magnesium Fluoride Quartz Supplier Location Colorado, USA See product details More from Meadowlark
Achromatic Quarter Waveplate	λ/4	Ø 17 mm	355 nm	Contact Supplier	$ 211.00
Product Code Wavelength Range 355 nm Center Wavelength 355 nm Reflectance < 0.4% Diameter 20 mm Dimensions Ø 20 mm Thickness 0.15 - 0.35 mm Parallelism < 10'' Retardance λ/4 Clear Aperture Ø 17 mm Damage Threshold Pulsed 10 J/cm² (10 ns, 1064 nm) Substrate Single Crystal Quartz Mount Non-Threaded Mount, 25.4 mm Shape Round Waveplate Order Low Order Supplier Location Lithuania See product details More from EKSMA Optics
Achromatic Quarter Waveplate	λ/4	20.3 mm (0.8")	835 - 720630 nm	1 - 2 days	$ 968.00
Product Code Wavelength Range 835 - 720630 nm Center Wavelength 630 - 835 nm 720 nm Thickness 7.11 mm (0.28") Retardance λ/4 Clear Aperture 20.3 mm (0.8") Damage Threshold Pulsed 4 J/cm² (20 ns, 1064 nm) 0.6 J/cm² (20 ns) Substrate N-BK7 Mount Unmounted Surface Quality 40-20 scratch-dig Transmitted Wavefront Error < λ/4 Beam Deviation < 1' Key Features Broad Spectral Range Superior Field of View Thermally Stable Retarder Material Polymer Retardance Accuracy < λ/100 Damage Threshold CW 0.5 kW/cm² Operating Temperature 20 - 50 °C Supplier Location Colorado, USA See product details More from Meadowlark
Achromatic Quarter Waveplate	λ/4	11.5 mm	610 - 850 nm	In stock	$ 935.00
Product Code Wavelength Range 610 - 850 nm Coating BBAR (610 - 850 nm) Reflectance < 0.7% (610 - 850 nm, Average) Diameter 25.4 mm (1") Dimensions Ø 25.4 mm (1") Thickness 8 mm Parallelism < 1' Retardance λ/4 Clear Aperture 11.5 mm Damage Threshold Pulsed 2 J/cm² (8 ns, 1064 nm) Substrate Crystalline Quartz Magnesium Fluoride Shape Round Surface Quality 20-10 scratch-dig Transmitted Wavefront Error λ/4 (633 nm, P-V) Damage Threshold CW 500 kW/cm² Thickness Tolerance ±0.1 mm Coating Features Broadband Supplier Location New Jersey, USA See product details More from Edmund Optics
Achromatic Quarter Waveplate	λ/4	Ø 17 mm	515 nm	4 - 5 days	$ 341.00
Product Code Wavelength Range 515 nm Center Wavelength 515 nm Reflectance < 0.5% Dimensions Ø 25.4 mm (1") Parallelism < 10'' Retardance λ/4 Clear Aperture Ø 17 mm Damage Threshold Pulsed > 10 J/cm² (10 ns, 1064 nm) Substrate Single Crystal Quartz Mount Non-Threaded Mount, 25.4 mm Shape Round Surface Quality 20-10 scratch-dig Waveplate Order Order 0 Supplier Location Lithuania See product details More from EKSMA Optics
Achromatic Quarter Waveplate	λ/4	Ø 17 mm	800 nm	4 - 5 days	$ 341.00
Product Code Wavelength Range 800 nm Center Wavelength 800 nm Reflectance < 0.5% Dimensions Ø 25.4 mm (1") Parallelism < 10'' Retardance λ/4 Clear Aperture Ø 17 mm Damage Threshold Pulsed > 10 J/cm² (10 ns, 1064 nm) Substrate Single Crystal Quartz Mount Non-Threaded Mount, 25.4 mm Shape Round Surface Quality 20-10 scratch-dig Waveplate Order Order 0 Supplier Location Lithuania See product details More from EKSMA Optics
Achromatic Quarter Waveplate	λ/4	Ø 17 mm	1064 nm	4 - 5 days	$ 152.00
Product Code Wavelength Range 1064 nm Center Wavelength 1064 nm Reflectance < 0.4% Diameter 20 mm Dimensions Ø 20 mm Parallelism < 10'' Retardance λ/4 Clear Aperture Ø 17 mm Damage Threshold Pulsed 10 J/cm² (10 ns, 1064 nm) Substrate Single Crystal Quartz Mount Non-Threaded Mount, 25.4 mm Shape Round Supplier Location Lithuania See product details More from EKSMA Optics
Achromatic Quarter Waveplate	λ/4	Ø 4 mm	1100 - 2000 nm (Coating Range)	In stock	$ 484.16
Product Code Wavelength Range 1100 - 2000 nm (Coating Range) Retardance λ/4 Clear Aperture Ø 4 mm Damage Threshold Pulsed 5 J/cm² (0.189 mm, 10 ns, 10 Hz, 1542 nm) Substrate Crystalline Quartz Magnesium Fluoride Surface Quality 20-10 scratch-dig Transmitted Wavefront Error λ/8 (633 nm) Beam Deviation < 10'' Retardance Accuracy λ/236 Supplier Location New Jersey, USA See product details More from Thorlabs
Achromatic Quarter Waveplate	λ/4	23 mm	700 - 1000 nm	In stock	$ 1050.00
Product Code Wavelength Range 700 - 1000 nm Coating BBAR (700 - 1000 nm) Reflectance < 0.6% (700 - 1000 nm, Average) Diameter 30 mm Dimensions Ø 30 mm Thickness 6 mm Parallelism < 1' Retardance λ/4 Clear Aperture 23 mm Damage Threshold Pulsed 2 J/cm² (8 ns, 1064 nm) Substrate Crystalline Quartz Magnesium Fluoride Shape Round Surface Quality 20-10 scratch-dig Transmitted Wavefront Error λ/4 (633 nm, P-V) Damage Threshold CW 500 kW/cm² Thickness Tolerance ±0.15 mm Coating Features Broadband Supplier Location New Jersey, USA See product details More from Edmund Optics
Achromatic Quarter Waveplate	λ/4	Ø 17 mm	852 nm	4 - 5 days	$ 176.00
Product Code Wavelength Range 852 nm Center Wavelength 852 nm Reflectance < 0.4% Diameter 20 mm Dimensions Ø 20 mm Thickness 0.15 - 0.35 mm Parallelism < 10'' Retardance λ/4 Clear Aperture Ø 17 mm Damage Threshold Pulsed 10 J/cm² (10 ns, 1064 nm) Substrate Single Crystal Quartz Mount Non-Threaded Mount, 25.4 mm Shape Round Waveplate Order Low Order Supplier Location Lithuania See product details More from EKSMA Optics