Quartz Multi-Order Quarter-Wave Plate — QWP20-780BM

Quartz Multi-Order Quarter-Wave Plate (Unmounted) — Model QWP20-780BM

Multi-order quartz λ/4 waveplate at 780 nm, supplied as an unmounted optical element.

Overview

These Quartz Multi-Order Quarter-Wave Plates deliver a quarter-wave (λ/4) retardance at the design wavelength using a single quartz plate whose thickness is chosen so that the optical path difference equals mλ+λ/4 (where m is a positive integer). Multi-order construction enables a single thicker plate to replace a compound zero-order design, reducing cost while preserving high transmission and damage threshold. Each plate is anti-reflection V-coated on both surfaces (R < 0.25% @ design wavelength, 6° incidence angle) and is supplied as an unmounted optical element.

Key Features

• Multi-order quartz design: mλ+λ/4 retardance (m is a positive integer)
• Delay accuracy: ±λ/300
• V-type anti-reflection coating: R < 0.25%ᵃ @ design wavelength, 6° AOI, per surface
• Surface finish: 10/5, parallelism < 3 arcsec
• Transmitted Wavefront Error (TWE) @ 633 nm verified
• Bare element for custom mounting or integration
• Design wavelengths from 266 nm to 1550 nm (optional by request)

Applications

• Polarization state conversion (linear ↔ circular / elliptical)
• Laser isolator and interferometry systems
• Ellipsometry and polarization-resolved imaging
• Integration with polarizing beamsplitters and prisms