The Lowell Fabry-Perot Interferometer is a state-of-the-art, observatory-class, ground-based system available at a modest cost. Attributes include vertical mounting, few moving parts, simplified pointing system, frequency-stabilized laser, and flat field shuttering, resulting in highest precision of geophysical measurement. In addition, SSI offers installation services, which entail carrying the system through first-light into routine operations, with daily data collection and automatic analysis.
Features
- Custom design and fabrication – we fit the FPI to your space
- Resonant cavity spacing from 3μm to 6cm
- Maximum throughput for a given spectral resolution
- Temperature stabilization and pressure control
- Pressure pot with PID controlled pressure servo to maintain proper gas pressure in tuned etalon cavity
- 150mm etalon with >80% reflectivity from 550nm – 900nm
- Etalon cage with invar contacts to minimize thermal expansion
- 0.4nm FWHM 3-cavity interference filters; CWL = 630nm and 557.7nm
- Custom weatherproof NEMA-4 housing available
Lowell Doppler (Air-Gap) Interferometer
*Click for larger view