Piezo Mirror Mount, UHV, Clear Edge, 2.0 in., 2-Axis, Left-handed

Ultra-high Vacuum Picomotor Optical Mounts

The 8822-L-UHV provides the precision and stability of the Picomotor actuator with greater beam access while utilizing the clear edge ULTIMA^® Kinematic Optical Mount can now be used in UHV environments (10^-9 Torr) as well as for VUV/EUV applications. It provides smooth, reliable motorized adjustment along with carbide pads, thick front and rear plates and optimized, stiff springs to improve the long-term stability and provide greater protection against vibrations. Spring-loaded pawls gently, but securely, hold a high precision 2 inch (50.8 mm) diameter optic from the back against three points on the front plate of the mount. Convenient clearance mounting holes on each of two sides are compatible with either 8-32 or M4 screws providing quicker, more precise, and more secure mounting.

Clear Edge Design

With a clear edge design, beams can be reflected from one mount to another at smaller incident angles, thus taking less space between the mounts. These types of mounts also provide the ability to pass a beam near the optic and allow for greater beam access. UHV Clear Edge Picomotor Optical Mounts are available for mounting 1-, 2- and 3-in. mirrors.

Easy-to-Use, Flexible Picomotor Controllers

Our Open-Loop Picomotor controllers and drivers are modular. You can daisy-chain up to 31 drivers together with four channels each, so you can have a network of up to 124 standard Picomotor actuators. You have two interface options with the controller system: hand pad or computer, both providing plug-and-play use. Alternatively, you may choose to use our TTL/Analog Picomotor driver.

How the Patented Picomotor Design Works

Picomotor actuators rely on the basic difference between dynamic and static friction. An example of this is the magician's "tablecloth trick," in which a quick pull (low dynamic friction) of the cloth leaves the dishes on the table, while a slow pull (high static friction) would pull the dishes off the table and cause a big mess! Our Picomotor actuator uses the same principle with a threaded jaw, similar to two halves of a split nut, clamped around a precision 80-pitch screw. One jaw is connected to one end of a piezoelectric transducer, and the other jaw is connected to the other end of the transducer. A slow electrical signal applied to the piezo slowly changes the length, causing the two jaws to slide in opposite directions. This slow sliding motion makes the screw turn (static friction). At the end of the transducer motion, a fast electrical signal quickly returns the jaws to their starting positions. Because of the screw’s inertia and low dynamic friction, it remains motionless, holding its position. Simply reversing the order of the fast and slow signals reverses the direction of rotation.

0.7 µrad Angular Resolution

Our Picomotor actuators allow for an angular resolution of 0.7 µrad, allowing for very small, controlled movements of your optics. The Picomotor actuator offers the additional advantage of using the integrated knobs for quick, manual adjustment of all axes.

Set-and-Forget Long-Term Stability

The Picomotor actuator moves when voltage is applied to the piezo, changing its length and in turn moving the jaws which turn the screw. When no power is applied, the actuator does not move. You can feel confident that your mount will stay put, even when you power down your system.

Smooth and Reliable Motorized Adjustment

With the thick front and rear plates, carbide seats, and optimized stiff springs, Picomotor large aperture mounts provides for smooth, reliable motorized adjustment while maintaining a high level of thermal and mechanical stability.

Specifications

Technical Specs

Type
Motorized
Optic Diameter
50.8 mm
Number of Actuators
2
Motorized Axes
2
Actuator Locks
Locked when powered down
Actuator Drive
Motorized
Angular Range
±5°
Adjustments
θx, θy
Thread Type
8-32 (M4) CLR
Cable Length
152.4 mm
Connector Type
4-Pin
Optic Loading
Front

Optic Mounting
Set Screw
Sensitivity
0.14 arc sec
Angular Resolution
0.7 µrad
Mechanism
Kinematic
Drive Type
Picomotor
Operating Temperature
10 to 40°C
Vacuum Compatibility
Ultra-high Vacuum (10-9 Torr)
Wire Type
Kapton
Material
Aluminum
Actuator Orientation
Left-handed

Type
Motorized
Optic Diameter
50.8 mm
Number of Actuators
2
Motorized Axes
2
Actuator Locks
Locked when powered down
Actuator Drive
Motorized
Angular Range
±5°
Adjustments
θx, θy
Thread Type
8-32 (M4) CLR
Cable Length
152.4 mm
Connector Type
4-Pin
Optic Loading
Front

Optic Mounting
Set Screw
Sensitivity
0.14 arc sec
Angular Resolution
0.7 µrad
Mechanism
Kinematic
Drive Type
Picomotor
Operating Temperature
10 to 40°C
Vacuum Compatibility
Ultra-high Vacuum (10-9 Torr)
Wire Type
Kapton
Material
Aluminum
Actuator Orientation
Left-handed

Resources & Downloads

Literature

UHV Picomotor Clear Edge Optical Mount Datasheet(823.3 kB, PDF)
Picomotor FAQ(3.1 MB, PDF)

2D Product Drawings

8822-L-UHV_RC(126.5 kB, PDF)

Technical Notes

Open vs Closed Loop Picomotors(1.6 MB, PDF)

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