Zero Order Half Waveplate 355 nm
Description
Ealing Zero Order Waveplates are the preferred type of waveplate. They are not as sensitive to changes in temperature, wavelength, angle of incidence, or collimation. A wavelength shift of 15 nm will result in approximately a 1% retardation change. They are supplied in a 25.4 nm mount. Applications for Half Waveplates include rotating the plane of polarization (e.g. in a laser), electrooptic modulation and as a variable ratio beamsplitter (when used in conjunction with a polarizing cube). Waveplates are made from materials which exhibit birefringence. The velocities of the extraordinary and ordinary rays through the birefringent material vary inversely with their refractive indices. For the case of crystal quartz the extraordinary beam has a higher refractive index and therefore a slower velocity. For this reason its direction is known as the ‘slow’ axis. Likewise, the direction of the ordinary beam is known as the ‘fast’ axis and is indicated by the marked lines on the mount. The thickness of a Half Waveplate is such that the phase difference is v (zero order) or 3v, 5v, 7v, etc (multiple orders). A linearly polarized beam incident on a Half Waveplate emerges as a linearly polarized beam but rotated such that its angle to the optic axis is twice that of the incident beam. It is usual to have the fast axis lying in the surface of the retarder at 45° to the input polarization. The Half Waveplate therefore introduces a 90° rotation of the plane of polarization.
Zero Order Half Waveplate 355 nm
Specifications |
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|---|---|
| Waveplate Type: | Zero Order |
| Material: | Quartz |
| Mounting: | Mounted |
| Shape: | Round |
| Size: | 25.4 mm |
| Center Wavelength: | 355 nm |
| Retardation: | Lambda/2 |
| Retardation Accuracy: | +/- Lambda/200 |
| Wavefront Distortion: | <= Lambda/8 |
| Surface Quality (Scratch-Dig): | 10-5 |
Features
Quarter and half waveplates
Zero or multiple order available
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Ships from:
United States
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On FindLight:
since 2017
Frequently Asked Questions
A Zero Order Half Waveplate 355 nm is a type of waveplate that is not as sensitive to changes in temperature, wavelength, angle of incidence, or collimation. It is used for rotating the plane of polarization, electrooptic modulation, and as a variable ratio beamsplitter.
The Zero Order Half Waveplate 355 nm is supplied in a 25.4 nm mount.
The slow axis of the Zero Order Half Waveplate 355 nm is the direction of the extraordinary beam, which has a higher refractive index and a slower velocity. The fast axis is the direction of the ordinary beam, which has a lower refractive index and a faster velocity.
The formula for calculating the phase difference of the Zero Order Half Waveplate 355 nm is θ = ± 2vd (ne-no) λ, where θ is the phase difference, d is the thickness of the waveplate in mm, ne and no are the refractive indices of the extraordinary and ordinary rays respectively, and λ is the wavelength in nm.
Some applications of the Zero Order Half Waveplate 355 nm include rotating the plane of polarization in a laser, electrooptic modulation, and using it as a variable ratio beamsplitter in conjunction with a polarizing cube.