DescriptionSpecifications
Models
Catalog PDF
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Our broadband polarization rotators provide precise control of the polarization orientation of a laser beam. Unlike λ/2 wave plates, these rotators provide broadband performance with two models covering 400–700 nm and 700–1200 nm. They feature a large 10 mm aperture, wavefront distortion below λ/2, and less than 10 arc sec beam deviation.
Polarization rotators are fabricated from two BK 7 Fresnel Rhombs, which are optically contacted, avoiding the use of cement which would limit power handling capability. The entrance and exit faces are broadband antireflection coated for greater than 98% transmission.
The polarization angle control provided by these rotators is required for a variety of applications including ellipsometry, polarimetry, scattering measurements, and component testing. A graduated scale on the rotator housing makes it easy to set and read the rotation angle with 10 arc min resolution.
Our polarization rotators are designed to mount conveniently on lasers using a standard 1-32 threaded mounting bezel. A slotted riser base is available to set the optical axis at 50.8 mm and mate with English and metric optical tables and components. Slots in the base provide 19 mm transverse adjustability. |
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Specifications
| Material | BK 7, grade A, fine annealed optical glass |
| Construction | Two Fresnel rhombs, optically contacted |
| Retardation | λ/2 |
| Retardation Accuracy | <±2° |
| Wavefront Distortion | ≤λ/2 at 632.8 nm over the full aperture |
| Surface Quality | 10-5 scratch-dig |
| Transmitted Beam Deviation | <10 arc sec |
| Acceptance Angle | ± 1.5° |
| Transmission | T >98% |
| Antireflection Coating | broadband, R<1% per surface |
| Damage Threshold | 100 W/cm2 CW, 2J/cm2 with 10 nsec pulses, typical |
| Adjustment Scale | 2° graduations from 0–720°, vernier for 10 arc min resolution |
| Mounting | 1-32 male thread one end, optional PR-2B base for 50.8 mm optical axis height |