Variable Circular Polarizers VCPBS24-1550

Variable Circular Polarizers — Model VCPBS24-1550

Laser line variable circular polarizer, Quartz + Liquid Crystal Polymer / N-BK7 window sheet, 10.0 mm clear aperture, operating wavelength 1550 nm, extinction ratio 2000:1 (Beamsplitter cube).

Overview

LBTEK combines a polymer true zero-order quarter-wave plate installed in an RM05 rotation mount with a laser line polarizing beamsplitter cube installed in a 30 mm coaxial beamsplitter cube mount to form a laser line variable circular polarizer. The line engraved on the top indicates the optical path direction, with the fast axis of the wave plate aligned to the 0° marking line. The initial position is preset and locked, resulting in right-handed circularly polarized emergent light (observed as left-handed circularly polarized light when facing the beam). The included wrench allows for loosening and rotating the quarter-wave plate to achieve various emergent lights, including elliptically, circularly, and linearly polarized light.

Key Features

• Design Wavelength: 532 nm, 633 nm, 780 nm, 1064 nm, 1550 nm
• Extinction Ratio (Tp:Ts): >2000:1
• Low-power Applications

Specifications

• Optical component material: Quartz + Liquid Crystal Polymer / N-BK7 window sheet
• Clear Aperture: 10.0 mm
• Operating Wavelength: 1550 nm
• Optical coatings: Anti-reflection coating, beamsplitter coating
• Extinction ratio: 2000:1 (Beamsplitter cube)
• Delay accuracy: ±λ/100 (Waveplate)
• Surface finish (scratches/pits): 20/10 (Beamsplitter cube), 40/20 (Waveplate)
• Transmitted light deflection: 0°± 5 arcmin
• Damage threshold: 500 W/cm (CW)
• Retardation: λ/4