![]() ![]() By using three mechanically identical arms, the mirror can be tilted in any direction over a ☒ mrad range (see the Specs tab). Applying a voltage to an arm will change the height of the mirror at the connection point. A second piezoelectric layer is bonded to the bottom of each arm, configured so that one layer will shrink while the other expands as an applied voltage is increased. The end of the arm is attached to a carrier board. The top layer of each arm is part of the ceramic disk carrying the actuators and only connects to the main part of disk via a small connection point. In addition to the 40 actuators, our DMP40 series of mirrors have three bimorph arms provide tip/tilt adjustment. This drawing shows the response of a single segment of the deformable mirror different voltages. A lower voltage at one electrode will result in a locally concave mirror shape, while a higher voltage will result in a locally convex mirror shape. Pure spherical shapes can be generated by applying no voltage or the maximum voltage. The surface is designed to be flat when half of the maximum voltage is applied across each electrode (see the drawing to the lower right). See the Graphs tab for the reflectance of the available coatings, the drawings below for diagrams of the keystone patterns, and the drawing to the right for a diagram of the mirror/piezoceramic disk/electrode structure.Įach segment is controlled independently by applying a positive voltage. The electrode attached to the back of the disk is divided into 40 single segments arranged in a circular keystone pattern. To construct the mirror assembly, a thin glass disk coated with UV-enhanced aluminum or protected silver is glued to a circular piezoceramic disk. The control software is available for download from the Software tab.Ī schematic showing the internal structure of the deformable mirror. The complete manual can be downloaded by clicking on the red document icon ( ) next to any of the part numbers below. Each mirror is shipped with an SM2CP1 end cap to protect the mirror surface when not in use, a power supply with a location-specific power cord, USB 2.0 cable for connecting the mirror to a PC, a calibration certificate, and a quick start guide. The front plate of each deformable mirror housing has external SM2 (2.035"-40) threads for compatibility with Thorlabs' SM2-threaded lens tubes and has four 4-40 taps that are compatible with Thorlabs' 30 mm cage systems. Please contact Tech Support for more information. ![]() For applications using high power or requiring higher reflectance, these mirrors can be customized with the crystalline coatings in use on our supermirrors. Each of these mirrors is available from stock with one of two optical coatings: UV-enhanced aluminum for 250 to 450 nm or protected silver for 450 nm to 20 µm (see the Specs and Graphs tabs for performance data). In addition, the actuators found on the DMH40 series offer more than twice the physical stroke compared to those on our DMP40 series. The mirror used in the DMH40 series has a larger, Ø14 mm pupil, but lacks tip/tilt biomorph benders. These benders enable tip/tilt actuation and allow the mirrors to be precisely aligned. Our DMP40 series features a mirror with a Ø10 mm pupil suspended by biomorph benders. We offer two varieties of deformable mirror. Each mirror can be controlled manually using the included software or used in a closed-loop system with a Thorlabs' Shack-Hartmann wavefront sensor (see the Software tab for more details). Thorlabs' Piezoelectric Deformable Mirrors provide fast, responsive platforms for changing optical wavefronts, making them ideal for correcting distortions that result from common sources of wavefront aberrations, such as astigmatism and coma (see the Types of Aberrations tab for more details). Software Program for Mirror Control via USB 2.0 Interface.Mirror is Deformed by 40 Electrodes Attached to a Single Piezoceramic Disk (See Diagrams Below).Single-Wavelength Crystalline Coatings Available for 900 nm to 5.0 µm via Tech Support.High Reflectance Metallic Mirror Coatings Available from Stock:. ![]()
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