The NP-TNF series, representing the most advanced tunable notch filter product in the category, is a polarizer-free tunable notch filter made from Kent Optronics proprietary liquid crystal materials.
The NP-TNF series is a polarizer-free tunable notch filter made from Kent Optronics’ proprietary liquid crystal materials. The NP-TNF provides the most agile means for light spectral notch. The notch wavelength of a single NP-TNF, with a bandwidth of a few tens to hundreds of nanometers, can be electrically tuned across a broad spectral region from 300 to1000 nm in the visible and infrared for light blocking or routing.
The product series provides customers with an excellent E-O component for serving as a tunable laser beam director, laser blocker, beam splitter, etc… in the envisioned photonics systems, such as laser protection devices, remote sensing, spectral imaging, vision-aid devices, and broadband light routing.
As compared to the state-of-the-art tunable notch filters, the NP-TNF series offers the following unprecedented performance specifications:
- Much broader tuning range over 300 to 1,000nm,
- high optical density (OD) at the notch wavelength
- >80% out band transmittance, and
- <0.5 ms/nm tuning speed
The product comes with a compact power supply that can be either battery or 110/220 V wall-plug powered. Customers have the options to choose the filter substrate material, shape, aperture, pixel format and the operation mode (i.e., manual or computer controlled). All products are offered at a competitive price. Contact us for a price quote with your specific application requirements.
NP-TNF™ Specifications
| Spectral region | 0.4-2.7 µm |
| Out notch band transmittance | ~80% |
| Polarization properties | Polarization insensitive |
| Tuning range | 30-1,000 nm (continuously tunable blocking) |
| Repeatability and precision | <±1 nm |
| Tunable narrowband blocking optical density | OD>3 over the bandwidth |
| Angular range for broadband transmission (parallel light operation) | >25° in air |
| Angular range for tunable narrowband blocking (parallel light operation) | >25° in air |
| Spectral bandwidth | 50-300 nm |
| Spectral uniformity | <2 nm |
| Clear aperture | Diameter: 5-50 mm (circular) Area: 5×5 to 50×50 mm² (square) |
| Thickness | <10 mm |
| Operating temperature range | -5°C (23°F) to 55°C (131°F) without heating mechanism; -40°C (-40°F) to 55°C (131°F) with heating mechanism |
| Survival temperature range | -51°C (123.8°F) to 120°C (248°F) |
| UV stability | Stable under UV-B at 40mW/cm² for 3000 hours |
| Laser damage threshold | >1 J/cm² (5ns pulsed @ 532nm) >1 kW/cm² (CW @ 532nm) |
| Uniformity of retardance | <0.1 OD across the clear aperture |
| Wavefront distortion | <0.5 wavelength at 633 nm |
| Parallelism | <2 arcminutes |
| Tuning speed | <0.7 ms/nm |
| Rate of change of temperature | Survives a rate of change of temperature of 3°C per minute |
| Driving voltage | Up to 350V |
| Computer interface | USB interface w/ PC |
| Weight | <100g (filter only) |
| Substrate material | Glass, quartz, and plastic (PC) |
| Cable length | 1 m |
| Input power to the driver | 110V or 220V/50-60Hz AC or 9V battery |
| Filter power consumption | <6mW/cm² |
| Power supply weight | 200g |