Waveplate
Waveplates are made from birefringent materials. The speeds of the o ray and the other ray through the material are inversely proportional to their refractive indices. Their speed difference produces a phase difference when they recombine; at a particular wavelength, this is determined by the retarding thickness. Transmission range: 330–2100nm. Thermal-expansion coefficient: 7.5 x10⁻⁶/K. Density: 2.51g per cubic centimeter. Half-wave plates: thickness gives a phase difference of L/2 wavelengths for true zero order, or multiples of l/2 wavelengths for multiple order. A linearly polarized incident beam remains linearly polarized, but its angle to the optical axis is twice the incident angle. A half-wave plate therefore acts as a continuously adjustable polarization rotator, used to rotate the polarization plane, for electro-optic modulation, and with a polarizing cube as a variable-ratio beamsplitter. Quarter-wave plates: thickness gives a phase difference of L/4 wavelengths for true zero order, or multiples of l/4 wavelengths for multiple order. When the angle q between the incident electric-field vector and the retarding principal plane is 45, the output is circularly polarized. Double passage by mirror reflection makes a quarter-wave plate act as a half-wave plate, rotating the polarization plane through a particular angle. Applications include generating circular or linear polarization from circular or elliptical states, optical pumping, suppressing unwanted reflections, and optical isolation.
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Overview
Specifications
| Parameter | Value |
|---|---|
| Transmission range [General page-top description, without specific subtype/material identification] | 330-2100 nm |
| Coefficient of Thermal Expansion [General page-top description, without specific subtype/material identification] | 7.5x10⁻⁶ |
| Density [General page-top description, without specific subtype/material identification] | 2.51 g/cubic centimeter |
| Material [Optically Contacted Zero-Order Waveplate] | Optical grade Crystal Quartz |
| Dimensional Tolerance [Optically Contacted Zero-Order Waveplate] | +0.0,-0.2 |
| Wavefront Distortion [Optically Contacted Zero-Order Waveplate; 633nm] | <L/8 |
| Retardance accuracy [Optically Contacted Zero-Order Waveplate] | <L/300 |
| Surface Finish [Optically Contacted Zero-Order Waveplate] | 20/10 Scratch and Dig |
| Antireflection Coating R [Optically Contacted Zero-Order Waveplate; at center wavelength] | <0.2 % |
| Standard Wavelength [Optically contacted zero-order wave plate; Parallel standard options, not a continuous bandwidth] | 532, 632.8, 800, 850, 980, 1064, 1310, 1550 |
| Material [Cemented Zero-Order Waveplate] | Optical grade Crystal Quartz |
| Dimensional Tolerance [Cemented Zero-Order Waveplate] | +0.0,-0.2 |
| Wavefront Distortion [Cemented Zero-Order Waveplate; 633nm] | <L/8 |
| Retardance accuracy [Cemented Zero-Order Waveplate] | <L/500 |
| Surface Finish [Cemented Zero-Order Waveplate] | 20/10 Scratch and Dig |
| Antireflection Coating R [Cemented Zero-Order Waveplate; at center wavelength] | <0.2 % |
| Standard Wavelength [Cemented zero-order wave plate; Parallel standard options, not a continuous bandwidth] | 266, 355, 532, 632.8, 800, 850, 980, 1064, 1310, 1550 |
| Material [Air-Spaced Zero-Order Waveplate] | Optical grade Crystal Quartz |
| Dimensional Tolerance [Air-Spaced Zero-Order Waveplate] | +0.0,-0.2 |
| Wavefront Distortion [Air-Spaced Zero-Order Waveplate; 633nm] | <L/8 |
| Retardance accuracy [Air-Spaced Zero-Order Waveplate] | <L/300 |
| Surface Finish [Air-Spaced Zero-Order Waveplate] | 20/10 Scratch and Dig |
| Antireflection Coating R [Air-Spaced Zero-Order Waveplate; at center wavelength] | <0.2 % |
| Standard Wavelength [Air-spaced zero-order wave plate; Parallel standard options, not a continuous bandwidth] | 266, 355, 532, 632.8, 800, 850, 980, 1064, 1310, 1550 |
| Material [Achromatic Waveplate] | Optical grade Crystal Quartz and MgF2 |
| Dimensional Tolerance [Achromatic Waveplate] | +0.0,-0.2 |
| Wavefront Distortion [Achromatic Waveplate; 633nm] | <L/8 |
| Retardance accuracy [Achromatic Waveplate] | <L/100 |
| Surface Finish [Achromatic Waveplate] | 20/10 Scratch and Dig |
| Antireflection Coating R [Achromatic Waveplate; at center wavelength] | <0.2 % |
| Standard Wavelength [Achromatic Waveplate; VIS] | 465-610 nm |
| Standard Wavelength [Achromatic Waveplate; NIR] | 700-1000 nm |
| Standard Wavelength [Achromatic Waveplate; IR] | 1200-1650 nm |
| Thickness [Optically Contacted Zero-Order Waveplate] | 1.5~2 millimeters |
Key Features
Datasheet
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