Double Linear Polarizer Variable Attenuators AFPL25-NIR

Double Linear Polarizer Variable Attenuator — Model AFPL25-NIR

N-BK7, operating wavelength 700 nm-1700 nm, clear aperture Ø21.5 mm, key spec >1000: 1 (600-1500 nm); >3000: 1 (1500-2000 nm).

Overview

LBTEK Double Linear Polarizer Variable Attenuators consist of two thin-film linear polarizers in series, providing continuous attenuation control by rotating one polarizer relative to the other. Designed for low-power continuous brightness reduction across visible (400-700 nm) and NIR (700-1700 nm) ranges. Includes two economical thin-film linear polarizers in a compact assembly.

Key Features

• Operating Wavelength: 700 nm-1700 nm
• Clear Aperture: Ø21.5 mm
• Extinction ratio: >1000: 1 (600-1500 nm); >3000: 1 (1500-2000 nm)
• Substrate: N-BK7
• Anti-reflective coating: Ravg<0.5 %@700-1700 nm
• Angle of incidence: 0°±20 °
• Surface finish (scratches/pits): 40/20

Applications

• Continuous brightness reduction in optical systems
• Variable laser power attenuation in low-power applications
• Imaging exposure control
• Optical density sweeping in characterization setups