Kinematic Mirror Mounts with Piezoelectric Adjusters
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The shaded region in the graph above denotes the range over which we recommend using our protected silver coating. Click here to download the raw data used to make this plot, as well as data at a 45° AOI.
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Schematic of ASM003 Mirror Mount
This piezo-driven mirror mount provides an angular resolution of better than 1 arcsec (<5 µrad). Each of the three adjustable axes consists of a manual and piezo adjuster in series. Ø7.0 mm optics up to 2.5 mm (0.10") thick are accommodated, and the Ø6.0 mm bore through the entire mount permits use with transmissive optics. A Ø7.0 mm protected silver mirror (Item # PF03-03-P01) is included; the reflectance of protected silver is shown to the right.
The fine-pitch manual adjusters, actuated with a flat head screwdriver (see diagram at right), provide 250 µm/rev and a full translation range of 1 mm (0.04"), for a full angular range of 4° (70 mrad). The piezoelectric elements embedded in the mount allow an additional 7 µm of translation, thereby providing an additional angular range of 2 arcmin (0.6 mrad). Each piezo adjuster is connected to a built-in 200 mm cable with a male SMC connector, and the maximum control voltage is 75 V. When driven by one of our piezoelectric drivers, the piezo elements can operate at up to 2 kHz, making this mirror mount an ideal laser cavity mirror holder when rapid scanning of a resonator cavity length is required.
The bottom of the ASM003 includes a mounting plate with an alignment key for mechanical compatibility with our family of flexure stages. The mounting plate is secured in place by two M2.5 cap screws that can be removed for custom mounting needs.
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These mirror mounts, based upon our KC1 mirror mounts, provide piezo-driven fine adjustments with a minimum angular resolution of 0.06 arcsec (0.3 µrad). Each of the three adjustable axes consists of a manual and piezo adjuster (Item # AE0505D08F) in series. The smooth bore version [Item # KC1-PZ(/M)] secures the mirror with an 8-32 (M4) setscrew and accepts mirrors at least 0.12" (3 mm) thick, while the SM1-threaded version [Item # KC1-T-PZ(/M)] secures the mirror with two included SM1RR Retaining Rings and accepts mirrors up to 0.20" (5 mm) thick.
The 1/4"-80 manual adjusters provide 7 mrad/rev and a full translation range of 6 mm (0.24"), for a full angular range of 10° (174 mrad). The piezoelectric elements embedded in the mount allow an additional 8 µm of translation, thereby providing an additional angular range of 30 arcsec (146 µrad). Each piezo adjuster is connected to a built-in 3' (91.4 cm) cable with a male BNC connector, and the maximum control voltage is 150 V. The knob assignments are shown in the diagram to the right.
Although SM1-threaded optics and lens tubes can be attached to the KC1-T-PZ, we do not recommend it because increasing the distance between the optic and the pivot points of the mount will amplify the movement of the beam. These mounts are also sold bundled with the MDT693B Three-Channel Piezo Controller, providing all the components needed for open-loop control of the mount (see below for details).
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Front Panel of Controller
These bundles provide all the components and cables needed for open-loop control of a three-axis kinematic mirror mount with piezo adjusters. They consist of our MDT693B Three-Channel Piezo Controller, a KC1-PZ(/M) or KC1-T-PZ(/M) mirror mount (see above for details on the mirror mount options), and a region-specific power cord selected at the time of the order.
The MDT693B piezo controller features three precise, low-noise, independently controllable output channels and is capable of supporting the piezo mirror mounts' maximum control voltage of 150 V. The control voltage can be modified using rotary knobs on the front panel and by providing an external signal through BNC or USB 2.0. The driver also includes a Master Scan mode that allows all three axes to be controlled by one signal. For more information, please see the full MDT693B presentation.