Spiral Phase Plates VP1-355

The LBTEK Spiral Phase Plate is a diffractive optical element that achieves phase modulation of light beams by varying the material height along the azimuthal direction, thereby generating vortex beams. When an incident plane wave passes through the spiral phase plate, it produces a vortex beam with a helical phase front, causing mutual cancellation at the optical axis and forming a central dark ring.

Spiral phase plates offer advantages such as high efficiency, stability, ease of operation, and a high damage threshold, making them widely applicable in optical tweezers, high-resolution microscopy, information processing, and surface topography measurement. Compared to liquid crystal polymers, UV-grade fused silica features lower absorption, making it more compatible with ultraviolet applications.

Key Features

• UV fused silica material, spiral staircase structure
• Applicable for generating vortex beams with spiral phase wavefronts
• Highly efficient and stable, easy to operate, high damage threshold
• Working wavelength: 355 nm, 532 nm, and 1064 nm; order m: 1, 2
• Flexible customization of parameter specifications available

Spiral Phase Plate Series

The LBTEK spiral phase plate is fabricated from UV-grade fused silica using surface relief technology, featuring a spiral staircase structure. The standard spiral phase plate has a clear aperture of 9×9 mm and is mounted in a compatible 1-inch mechanical housing. The housing surface is engraved with the product model number.