Features

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• 50° Adjustment Cone and Three 90° Positions
• Sub-mm-Level Precision Free-Space Beam Steering
• Post-Mountable and Fully Lockable
• AR Coating: -A (350 - 650 nm), -B (650 - 1050 nm), or -C (1050 - 1620 nm)
• Optical Surface Quality: 20-10 Scratch-Dig
• Maximum Suggested Beam Diameter: 4 mm

This post-mountable tweaker plate module consists of a precision-polished, AR-coated, plane-parallel plate mounted on Thorlabs' TRB1 ball and socket adapter. This fully lockable module allows for quick and precise beam displacement and provides a 50° adjustment cone along with three 90° positions. The module can be adjusted in increments of 10 µm by hand depending on the dexterity of the user. When mounted onto a TR Series post via an 8-32 (M4) tapped hole in the base, three radially positioned locking screws lock the ball and socket in place and double as tension adjusters for precision alignment. Upon locking, the beam may shift ±2 µm. This module is ideal for both horizontal and vertical free-space beam steering and for correcting known offsets of optical systems. The module is shipped with a hex key.

The AR-coated plane-parallel plate has <0.5% average reflectance over its specified wavelength range. The plates have Thorlabs' standard A (350 - 650 nm), B (650 - 1050 nm), or C (1050 - 1620 nm) AR coating. The reflection curves for all three coatings is located in the upper right-hand corner of the page.

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• 360° Rotation
• Vertical and Horizontal Beam Displacement
• Use for Beam Steering within a FiberBench System
• AR Coating: -A (350 - 650 nm), -B (650 - 1050 nm), or -C (1050 - 1620 nm)
• Use as Attenuator (0 - 20 dB)
• Use to Correct Known Offsets of System Optics

The XY Tweaker Module, for use in Thorlab's FiberBench systems, 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.