DM Series Differential Micrometers deliver ultra-fine, sub-micron positioning capabilities and coarse travel up to 25 mm in a single instrument. The mounting interface is threaded which allows for easier front-side installation as opposed to using a back-side retaining nut. In most cases, DM Series Differential Micrometers can directly replace BM Series Micrometers and BHC Locking Drives to provide approximately ten times better positioning sensitivity. DM Series Micrometers are the standard choice of actuator on UMR and MVN Series Stages and on SL Series Mirror/Beamsplitter Mounts.

In essence, the DM Differential Micrometer is a standard micrometer with a high-resolution micrometer built around it. Coarse positioning, provided by the control knob at the end of the micrometer, enables rapid translation with a sensitivity of 1 µm. Then, using the fine adjustment knob closest to the positioner, position can be further optimized with a sensitivity of 0.1 µm over a limited travel range. The fine adjustment knob is graduated to permit direct reading of position in 1 µm increments. Model numbers correspond to the diameter of the control knob and the travel range.

Compatible with these stages and optical mounts:
• UMR3 Series 
• UMR5 Series 
• UMR8 Series 
• UMR12 Series 
• MVN Series 
• TGN Series
• SL Series
• SL-A Series