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HR Right-Angle Retroreflectors consist of two perpendicularly aligned reflective surfaces (90° angle) that reflect incoming light back along its original path, regardless of incidence angle (up to 15° off-normal). The retroreflective geometry ensures stable beam return in dynamic environments.
Substrates:
Fused Silica (Vis-NIR): 400–1700 nm transparency, ideal for precision metrology.
Silicon (Mid-IR): 1–8 μm, suitable for 10.6 μm CO₂ laser systems.
Coatings:
Dielectric (Narrow-Band): >99% reflectivity @ 633 nm (He-Ne lasers), 1064 nm (Nd:YAG).
Metallic (Broadband): Protected silver (450–20,000 nm) or gold (2–20 μm) for IR applications.
Angle Accuracy: ±5 arcseconds (measured via autocollimator), ensuring <0.1 mrad beam deviation.
Surface Flatness: λ/10 @ 633 nm, with edge chamfers (0.3 mm) to prevent mounting stress.
Maintains retroreflection for angles of incidence up to 15°, making them robust for misaligned input beams in industrial automation.
Available in sizes from 6.35 mm (0.25") to 50.8 mm (2") cubic dimensions, with thicknesses matching aperture size for mechanical stability.
Dielectric: >99.5% @ specified wavelength (e.g., 785 nm for Raman systems).
Gold: >98% from 3–20 μm, consistent with thermal imaging requirements.
Engineered with stress-relieved edges to withstand mechanical shocks (50 g, 11 ms) and vibrations (20–2000 Hz, 1.5 g), critical for aerospace applications.
Industrial Robotics: Maintain precise beam paths in robotic welding cells, ensuring <50 μm positional accuracy over 10 m distances.
Optical Tables: Serve as reference retroreflectors in Michelson interferometers for nanometer-scale displacement measurements.
LiDAR Systems: Redirect 905 nm/1550 nm laser pulses in solid-state LiDAR arrays, improving signal-to-noise ratio by 20%.
ADAS Calibration: Used in automotive test labs to validate radar-lidar synchronization via retroreflective targets.
Inertial Navigation: Stabilize laser gyroscopes by reflecting beams in closed-loop optical cavities, reducing drift to <0.1°/hr.
Satellite Communication: Align free-space optical links (800–1600 nm) between satellites, compensating for orbital vibrations.
Coordinate Measuring Machines (CMM): Enable non-contact position tracking of CMM probes with sub-micron resolution.
Laser Trackers: Extend measurement ranges up to 100 m by reflecting beams off retroreflectors on target objects.
What is the maximum working distance for HR Right Angle Retroreflectors?
Effective distance depends on laser power and detector sensitivity, but typical ranges are 50–200 m for 1 mW lasers in well-aligned systems.
Can HR Right Angle Retroreflectors be used with polarized light?
Yes, but dielectric coatings may introduce polarization-dependent loss (PDL). Specify polarization-insensitive coatings for PDL <0.1 dB for HR Right Angle Retroreflectors
How to mount HR Right Angle Retroreflectors for minimal thermal drift?
Use invar mounts (CTE: 1.5 ppm/°C) and torque-limited screws (0.5–1 N·m) to minimize thermal expansion effects.
Do you offer anti-reflective coatings on non-reflective surfaces?
Yes, back surfaces can be AR-coated (≤0.2% reflectance) to eliminate parasitic reflections in multi-pass optical systems.
Angle Calibration Guarantee
Every HR Right Angle Retroreflectors is individually tested for 90° angle accuracy using a Fisba R-Cube interferometer, with calibration certificates traceable to NIST standards.
High-Damage Threshold Coatings
Dielectric coatings withstand 1.2 J/cm² (10 ns, 1064 nm), 20% higher than industry norms, suitable for high-energy pulsed laser applications.
Custom Packaging Options
Available in anti-static ESD bags or hermetically sealed containers (for moisture-sensitive environments), with desiccant packs included for long-term storage.
Global Service Network
24/7 technical support via email/phone, with regional offices in North America, Europe, and Asia-Pacific for localized inventory and expedited shipping.
