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A high performance wavefront corrector for demanding applications in astronomy and lasercom
The Kilo-DM is an enabling component for precise, high speed, high resolution wavefront control.
With 1020 actuators controlled to under 1nm of precision and no hysteresis, this system is ideal
for demanding applications in astronomy and laser
communication. The high-speed electronics driver
is capable of 60 kHz frame rate and 14 bit step
resolution. Originally developed for a DARPA
coherent laser communication project, the Kilo-DM
is currently used by the European Southern
Observatory, NASA's Terrestrial Planet Finder, and
various defense agencies.
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MEMS Deformable Mirrors
MEMS deformable mirrors are currently the most commonly used in many AO applications given
their versatility, maturity of technology, and the high resolution wavefront correction capabilities.
Using advanced, inexpensive manufacturing technology, MEMS DMs performance strengths are
inherent to micromachining:
1. large actuator arrays create high resolution wavefront correction
2. advanced microstructures allow minimal influence between adjacent actuators for high spatial frequency surfaces
3. optimized design enables rapid wavefront shaping for high speed applications |
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DM Specifications
- Continuous (DM) or Segmented (SLM) Surface
- 1020 actuators (32×32 array without 4 corners)
- Coating: Aluminum or Gold
- Protective Window with 400-1100 nm or 1550 nm AR Coating
- Zero hysteresis
- Fill Factor >99% (DM), 98% (SLM)
- Sub-nm average step size
- Surface Finish: <20 nm RMS
- Stroke: 1.5 μm
- Aperture 9.3 mm
- Pitch: 300 μm
- Approx. Mechanical Response Time
(10%-90%): <20 μs
- Approx. Interactuator Coupling (±5%): 25%
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Driver Specification
- DIO Interface: 32-bit LVDS (200 MB/s)
- 14 bit step resolution
- Frame Rate: 34 kHz / 60 kHz (Low Latency)
- Dimensions: 5.25" × 19" × 14" (3U Chassis)
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