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• Use for Beam Steering with Micron-Level Precision
• AR Coating: -A (350 - 650 nm), -B (650 - 1050 nm), or -C (1050 - 1620 nm)
• R_avg<0.5% over Wavelength Range
• Vertical and Horizontal Beam Displacement
• Use as Attenuator (0 - 20 dB)
• Use to Correct Known Offsets of System Optics
• Please Contact FiberBench@Thorlabs.com for More Information or Special Requests

The XY Tweaker Module consists of a precision-polished, AR-coated, plane-parallel plate mounted on a magnetic ball and socket. The module allows for quick and precise displacement of a beam parallel to the optical axis, thus enabling several hundred microns of positional correction due to source drifting. The plates are offered with a thickness of 2.5 mm and can be rotated and tilted in nearly any orientation. The beam is consequently displaced parallel to the optical axis by as much as 500 µm. Tilting beyond 30º is not recommended as it can cause insertion loss because of the angular dependence of the AR coating. Please see the Graphs Tab for AR coating information.

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• Mounts in FT-SM05 Ø1/2" Optic Mount
• Ø1.5 mm or Ø2.5 mm Aperture Available

Aperture Plates are a useful tool for system alignment or to measure beam size. The aperture plate should be mounted into the Ø1/2" optic mount (as shown in the image to the right) and then used to establish an optical center line in a FiberBench system. It is also useful for blocking stray light or other unwanted light in an optical system.

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• Central Hole Allows Partial Beam Transmission for Alignment
• Ideal for Use as a Drop-In Alignment Guide
• Use with Our Ø1/2" Optical Component Holders

These IR alignment disks are ideally used as drop-in tools to simplify active alignment of IR and visible setups. A small Ø1.5 mm hole at the center enables beams to be aligned with the optical axis of our mounts or lens tubes. The active material on the VRC4D05 does not require charging and will emit light persistently when exposed to light in the 790-840 nm, 870-1070 nm, or 1500 to 1590 nm spectral region. The active material on the VRC2D05 requires charging by visible light. When charged and exposed to light in the 400 to 640 nm or 800 to 1700 nm spectral region, the disks will emit light.