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Optical Bandpass Filter 700nm FWHM 8nm
Optical Bandpass Filter 700nm FWHM 8nm is an narrow band optical filter to transmit light centered 700nm and half bandwidth 8nm. Coligh manufactures EUV to 30000nm bandpass filters.
- Center wavelength 700nm
- FWHM 8nm
- Transmission peak ≥75%
- Blocking depth OD5
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Optical Narrow Bandpass Filter 700nm FWHM 8nm Description
Optical Bandpass Filter 700nm) is a high-performance filter designed for high-precision near-infrared spectral selectivity.
- Central wavelength 700+/-2nm, precise wavelength accuracy, avoid system calibration failure due to wavelength drift
- Half bandwidth 8+/-2nm, high-precision coating process control to ensure batch consistency
- Transmittance in the passband is greater than or equal to 75%, cut-off depth OD5 in the non-passband range of 200-1100nm, completely shielding ultraviolet, visible light and near-infrared interference
Optical Bandpass Filter 700nm FWHM 8nm Technical Datasheet
| Parameter | Specification |
| Center Wavelength | 700nm ± 2 nm |
| FWHM | 8 nm ± 2 nm |
| Peak Transmission | ≥ 75% |
| Blocking Range | 200–1100 nm |
| Blocking Depth | OD5 |
| Substrate Material | UV Fused Silica， K9, B270 |
| Surface Quality | 80-50, 60-40,40-20 (MIL-PRF-13830B) |
| Clear Aperture | ≥ 90% of the filter diameter |
| Filter Dimensions | φ12mm，φ15mm，φ25.4mm or custom |
| Angle of Incidence | 0° +/-5° |
| Coating Type | Hard-coated |
| Durability | MIL-STD-810E compliant， Method507.3 |
| Other similar FWHM availiable | 282/8nm, 340/8nm, 405/8nm, 450/8nm, 480/8nm, 492/8nm, 505/8nm, 510/8nm, 546/8nm, 578/8nm, 620/8nm, 630/8nm, 670/8nm, 700/10nm, 750/10nm, 760/10nm |
Optical Bandpass Filter 700nm FWHM 8nm Applications
- Fluorescence imaging
The 700/8nm bandpass filter only transmits 700±4nm signals, which can block excitation light and background noise. In vivo imaging requires penetration of biological tissues. 700nm is in the “tissue optical window” and has low scattering. Therefore, this filter can be used in live animal imaging systems. - Raman spectroscopy detection
When close to the laser wavelength, Raman spectroscopy needs to separate weak Raman scattering signals. 700nm may be the characteristic peak position of some carbon molecules and biological molecules. The 700/8nm optical filter can filter out laser Rayleigh scattering and stray light, retaining only Raman signals near 700nm to avoid signal drowning. - Astronomical observation
The 700nm in the astronomical spectrum corresponds to the emission line of hydrogen or helium, which needs to be separated from the continuous spectrum. The 700/8nm bandpass filter can isolate the target spectral line and suppress the influence of light pollution and atmospheric scattering. And help observatories or satellites capture deep space target features
