Liquid Crystal Variable Retarders LCVR-H20C-B

Liquid Crystal Variable Retarders — Model LCVR-H20C-B

2-inch compensated liquid crystal variable retarder for 700-1100 nm; Ø20 mm clear aperture, tunable retardance from 0 to λ/2.

Overview

The LBTEK Liquid Crystal Variable Retarder (LCVR) is based on nematic liquid crystal and ITO glass materials, constructed with an anti-parallel liquid crystal cell, housed in a mechanical casing with attached wiring.

By applying an external AC voltage (DC voltage not allowed), the uncompensated liquid crystal cell achieves flexible tunability with a retardation range of approximately several tens of nanometers to λ/2, while the compensated liquid crystal cell offers a retardation range from 0 to λ/2.

Key Features

• Nematic liquid crystal/ITO glass, anti-parallel liquid crystal cell, with mechanical housing and wiring
• Uniform in-plane alignment of liquid crystal molecular fast axes, tunable retardance from tens of nanometers to λ/2 or from 0 to λ/2 via externally applied AC electric field
• Functionality as a polarization modulator or pure phase retarder
• Fast response time, wide operating wavelength and temperature range
• Operating wavelength λ: 400-700 nm/700-1100 nm/1100-1700 nm optional, clear aperture: Ø10 mm/Ø20 mm optional
• Compatible with voltage controller LCVRC-2K25, custom services for parameter specifications available

Applications

• When used as a polarization modulator, the polarization direction of the incident linearly polarized light should be at 45° to the fast axis
• When used as a pure phase retarder, the polarization direction of the incident linearly polarized light should align with the fast axis at 0°