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| Coad | 669291 | Substrate | UVFS | |
| Type | True Zero-Order Half-Wave Plate | Diameter(mm) | 25.40 | |
| Thickness | - | Wavelength(nm) | 1064 | |
| Mechanical Housing | Equipped with a non-detachable mechanical housing | Shell Diameter | 25.4 + 0.0/-0.1mm | |
| Outer Shell Thickness | 4.79mm | Clear Aperture（mm） | 20.00 | |
| Parallelism | <3 arcsec | Optical Retardance | λ/2 | |
| Delay Accuracy | ±λ/350 | Delay Uniformity | - | |
| AOI | - | Surface Quality | 10-5 | |
| Operating Temperature | - | Fast Axis Accuracy | - | |
| Transmission Wavefront Deviation | λ/6 over CA / λ/8 over CA(50%) | Laser Damage Threshold | - | |
| Coating Type | V-Type Anti-Reflection Coating | Coating Specifications | R<0.25%@1064nm,AOI=6° |
LBTEK quartz true zero-order half-wave plates are made from a single quartz crystal and have a thickness on the micron scale, which gives them low mechanical strength but allows for larger incident angles. When a linearly polarized light beam is incident perpendicularly on the waveplate made from uniaxial crystal, it splits into ordinary (o) and extraordinary (e) rays that propagate in the original direction but with perpendicular vibration directions. The corresponding refractive indices are no and ne. Since the two types of light travel at different speeds in the crystal, the phase delay generated after passing through a waveplate of thickness d is given by δ = (2π/λ) |no-ne|d, where |no-ne|d is the optical path difference. The optical path difference generated by a half-wave plate is (2m+1)λ/2, and the phase delay is δ = (2m+1)π, where m is a non-negative integer, with m = 0 for true zero-order half-wave plates.
LBTEK quartz true zero-order half-wave plates are commonly used to rotate the polarization direction of linearly polarized light. Compared to quartz multi-order waveplates, the true zero-order quartz waveplate is insensitive to temperature and incident angles, making it suitable for high-power applications. Additionally, the LBTEK quartz true zero-order waveplates come with a mechanical housing that is non-removable, ensuring ease of use.
LBTEK quartz true zero-order half-wave plates are commonly used to rotate the polarization direction of linearly polarized light without altering the light intensity. When linearly polarized light passes through the true zero-order half-wave plate, the optical path difference created is λ/2, and the phase delay is π. The quartz true zero-order half-wave plate comes with a non-removable mechanical housing, and the surface of the housing is engraved with the product model and fast axis identification lines, making it easy for customers to identify and use.
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