The VBTuF stands out from other state-of-the-art tunable band-pass filters because of its large range of central wavelenghts and its independently variable bandwidths.
Variable Bandwidth Tunable Filter
The Variable Bandwidth Tunable Filter (VBTuF), based on Kent Optronics's privately owned liquid crystal design, is the most agileway to select light spectrums with user-controlled bandwidths. The center wavelength of a single filter can be electrically tuned across a spectral region of 300 to 1,000 nm in the visible and infrared. Additionally, the user can choose a bandwidth of anywhere from a few to hundreds of nanometers.
This product series provides customers with an E-O component that serves as a tunable light illuminator or a spectrum discriminator/selector.
As compared to state-of-the-art tunable bandpass filters, the VBTuF offers the following unprecedented performance specifications:
- A much broader tuning range: 300-1,000 nm
- Variable spectrum bandwidth: 5-100's nm
- ~30% in-band transmittance
- <1% out-band light leakage
- <0.5 ms/nm tuning speed
This product comes with a compact power supply. Customers have the option to choose:
- Filter aperture
- Spectrum tuning range
- Spectrum bandwidth
- Operating interface
Potential Applications:
- Spectrum analytical instruments
- Remote sensing
- Spectral imaging
- Vision-aid devices
Narrow bandwidth
Medium bandwidth
Broad bandwidth
VBTuF Specifications
| Spectral tuning region | 0.4-2.7 µm |
| Wavefront distortion | <0.5: wvelength at 633 nm |
| Spectral bandwidth | 5-100 nm |
| Parallelism | <2 arcminutes |
| In-band transmittance | ~40% |
| Out-band transmittance | <1% |
| Tuning speed | <1 ms/nm |
| Rate of change of temperature | Survives a rate of change of temperature of 3°C per minute |
| Polarizing properties | Linear polarization |
| Computer interface | USB interface w/PC |
| Repeatability and precision | <±1 nm |
| Substrate material | Glass, quartz |
| Angular acceptance | ~25° in air |
| Input power to the driver | 110V or 220V/50-60 Hz AC |
| Spectral uniformity | <0.1 nm |
| Filter power consumption | <1mW/cm² |
| Clear aperture | Diameter: 5-50 mm (circular) Area: 5x5 to 50x50 mm² (square) |
| Weight | <100g (filter only) |
| Operating temperature range | -5°C (23°F) to 70°C (158°C) without heating mechanism -40°C (-40°F) to 70°C (158°F) with heating mechanism |
| Survival temperature range | -51°C (-59.8°F) to 120°C (248°F) | UV stability | Stable under UV-A&B |