Excelitas VariFi™ linear variable filters provide a unique solution for controlling background noise and higher-order effects in spectrometers. Our proprietary technology enables cost-effective production of linearly variable filters over a wide range of sizes. These filters are available in the visible, near infrared, and mid-infrared spectral ranges and can be delivered on various substrate materials.
Excelitas manufactures spatially variable response coatings in which the center wavelength of operation changes with position in a linear manner over the surface of the optic. VariFi Linear Variable Filters are offered in narrow band pass, long pass, short pass, and order sorting filters.
| Typical Specifications | ||
| Resolution | 1 – 2% FWHM | |
| Linearity | ±1.0% | |
| Size | 60 mm x 25 mm to 3.0 mm x 1.0 mm | |
| Surface Quality | 40-20 | |
| Temperature Range | −196 °C to 400 °C | |
| Attenuation | > OD3 | |
| Full tunability in your systemby using the followingLinear Variable Filters: | Short Wavelength Pass filter:Edge to be tuned from 380 – 700 nm | Long Wavelength Pass filter:Edge to be tuned from 300 – 850 nm |
Yes, we retrofit legacy systems (e.g., GE Frame 5, Siemens V94.2) with modern digital controllers, typically completing hardware integration within 4-8 weeks. Software migration requires additional validation time.
We recommend annual performance testing under ISO 3977-2 standards. Critical applications (e.g., offshore platforms) may require semi-annual tests with emissions compliance checks.
All rad-hard devices (e.g., FPGA, ADC) are QML Class V certified under MIL-PRF-38535 and tested to MIL-STD-883 Method 1019 for SEU tolerance. Full qualification reports are available upon request.
Our ASICs and power management ICs operate across -55°C to +175°C ambient temperatures, with derating curves provided in military temperature range (MTR) datasheets.
Our PMA parts (e.g., actuators, sensors) hold FAA/EASA Form 1 certification and match OEM form/fit/function. Installation requires SB/MB documentation per FAA AC 23.1529.
All NAS/MS fasteners include full DNA traceability: melt source (AMS 2301), heat/lot numbers, and AS9100-compliant MTRs with ultrasonic test reports.
AOG orders ship within 4 hours for stocked items (FAA-PMA, EASA Part 21G). Non-stock critical parts trigger priority manufacturing with 72-hour max turnaround.
Gas Turbine
Aircraft parts
