issue date：2016-3-31 15:35:44 visit frequency：2943
Narrow band filters are ideal for a variety of applications, such as spectral radiometry, medical diagnostics, chemical analysis, colorimetry, astronomy, and wherever spectral isolation is required. Narrow band filters pass a narrow spectral band of UV, visible, or NIR radiation and reject out of band wavelengths from the X-ray to the far IR. The narrow range of wavelengths is defined as the FWHM (full-width at half- maximum intensity). Narrower filters decrease the background noise. Furthermore, it is difficult to maintain high transmission through the bandpass of the filter as it becomes narrower. If the peak transmission decreases as the filter is made narrower, the emission signal decreases and the gain in S/N (signal-to-noise) is not realized.
XF Photonics Co.,Ltd has achieved this goal of high transmission for narrower filters. We have evolved its narrowband product line from 6 nm to 3 nm FWHM, significantly lowered the prices on all filters.
|
Substrate |
N-BK7 or others |
|
Dimension |
Custom design |
|
Thickness |
5mm |
|
Dimension Tolerance |
±0.1mm |
|
Surface Quality |
40 – 20 |
|
Clear Aperture |
>90% |
|
Center Wavelength(CWL) |
555 ±5nm |
|
Tpeak |
>85% |
|
Full Width-Half Max(FWHM) |
30±7nm |
|
Optical Density(OD) |
>4 |
|
Blocking Range |
200-1200mm |
|
RoHS |
Compliant |
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