Polymer Beamsplitter DOEs LCBS25-1064-0203-050030

Overview

The LCBS25-1064-0203-050030 is a polymer beamsplitter diffractive optical element (DOE) built as a sandwich flat-plate stack of Liquid Crystal Polymer/N-BK7 Window Plate. A liquid-crystal-polymer phase structure with a half-wave retardation distributes the incident energy across the diffraction orders to produce a 2×3 split pattern with a 0.5 °×0.3 ° separation angle at 1064 nm. The element measures Ø25.4×3.2 mm with a Ø21.5 mm clear aperture, reaching 81.82 % diffraction efficiency and >95 % beam-splitting uniformity. Unlike cascaded-grating beamsplitters it imposes no requirement on the polarization state of the incident light, and it supports odd-number splitting.

Applications

• Parallel laser processing
• Optical sensing
• Medical aesthetics

Construction & Performance

The liquid-crystal-polymer film is sandwiched between glass windows, so the diffractive phase profile is protected inside the stack rather than exposed as a surface relief. Multi-level phase variation is achieved through the molecular fast-axis arrangement, which raises diffraction efficiency and suppresses noise from ineffective diffraction orders. Transmittance at the working wavelength is >98 % over a 40/20 surface quality, with Ravg＜0.5 %@700-1100 nm and an operating temperature range of -20~80°C. Key specifications for this model:

• Component Size: Ø25.4×3.2 mm
• Operating Wavelength: 1064 nm
• Clear Aperture: Ø21.5 mm
• Separation Angle: 0.5 °×0.3 °
• Component Material: Liquid Crystal Polymer/N-BK7 Window Plate
• Beam Splitting Mode: 2×3
• Diffraction Efficiency: 81.82 %
• Beam Splitting Uniformity: >95 %
• Transmittance (@working wavelength): >98 %
• Surface Quality (Scratch/Dig): 40/20
• AR Coating: Ravg＜0.5 %@700-1100 nm
• Operating Temperature: -20~80°C

Storage & Handling

Handle the element by its edges and keep both window faces clean. Blow off loose particles before any contact cleaning, then use optical-grade solvent with lens tissue only when necessary. Keep the incident beam inside the clear aperture, stay within the specified operating temperature range, and store the element in its original container in a clean, dry place away from direct sunlight.