FMR Series Compact Precision Beam Mirrors FMR-20 FMR-20-PG-0.2x0.2D-M
FMR fine-steering mirrors combine compact size and large clear apertures for fast, precise two-dimensional beam control at microradian resolution. Voice-coil actuators surrounding the mirror support low- through high-power lasers. High-power coatings and optional rear-mounted beam absorbers suit demanding applications such as two-dimensional wobbling. A bearing-free structure ensures excellent repeatability and long life. The FMR-20 is designed for precise tilt control and high angular resolution. It scans beam patterns at bandwidths up to 250 Hz with a tilt range of ±2.3 mrad. The FMR-20 uses a 20×20 mm² mirror, large clear aperture and fast response to provide microradian-accuracy two-dimensional control. Compact size, high-power coatings and direct installation of a beam absorber behind the mirror suit demanding two-dimensional wobbling. Protected-gold and near-infrared dielectric coating options suit laser processing and free-space communications. With an Optotune ICC-4C-2000 industrial current controller, it forms a plug-and-play precision beam-steering system.
Overview
Specifications
| Parameter | Value |
|---|---|
| Driver | Voice Coil |
| Single-Axis Mechanical Tilt Angle | ±5.2 mrad; ±0.3° |
| Mechanical Tilt Angle with Simultaneous Dual-Axis Drive [Circular Field of View] | ±3.5 mrad; ±0.2° Circular Field of View |
| Mirror Dimensions | 20 mm × 20 mm |
| Mirror Thickness | 2 mm |
| Device Dimensions | 50.8 mm × 50.8 mm × 12 mm |
| Weight | 53 g |
| Motion Mode | Two-Dimensionally Programmable |
| Position Control | Open Loop |
| External Sensor | Optional (For Feedback Control) |
| Range Drift | 1000 ppm/K |
| Resolution [Used with ICC-4C-2000] | 4 µrad( Used with ICC-4C-2000) |
| Static Motor Constant | 17.5 mrad/A /; 1.0 °/A |
| Dynamic Motor Constant | 1.2 × 10⁴ rad/(A·s²) |
| Resonant Frequency | 130 ± 5 Hz |
| Bandwidth [Sine Wave ;±2.3 mrad] | 250 Hz( Sine Wave ,±2.3 mrad) |
| Typical Transition (Rise) Time | 1.3 ms |
| Settling Time | 4 ms |
| Mirror Treatment | Protected Gold Coating, Near-Infrared Dielectric Coating; 1064 nm High Power, Customizable |
| Reflectance [Protected Gold ; Wavelength 800–2000 nm; Angle of Incidence 0–45°] | >95% |
| Reflectance [Near-infrared dielectric coating; wavelength 750–1100 nm; incidence angle 0–45°] | >98% |
| Reflectance [1064 nm High Power ; Wavelength 1060–1100 nm; Angle of Incidence 58–70°] | >99.9% |
| Surface Quality | 5/ 5×0.4; L1×0.06; C3×0.25; ISO 10110, equivalent to scratch-dig 60/40 |
| Mirror Flatness [1100 nm; Peak-to-Valley Value] | 2 λ (1100 nm) peak-to-valley |
| Damage Threshold LIDT [10 ns pulses; 10 Hz; ISO 21254; 1064 nm high-power coating] | 10 J/cm², 10 ns Pulses, 10 Hz, ISO 21254 (1064 nm High-Power Coating) |
| Maximum Continuous Current [RMS; Single Axis] | 300 mA |
| Maximum Continuous Current [RMS; Dual Axis; Per Channel] | 200 mA |
| Maximum Peak Current [Continuous 10 ms] | 1 A |
| Average Power Consumption | < 4 W |
| Nominal Driver Resistance (Per Channel) | 9.8 Ω |
| Temperature Sensor | ILM75BTP,147 or compatible model; I2C-address: 1001100x (R: 0x98 / W: 0x99) |
| EEPROM | M24C64-FMC6TG or compatible model; I2X-address: 1010000x (R: 0xA0 / W: 0xA1) |
Key Features
Datasheet
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