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573/22nm Narrow Band Optical Filter
573/22nm Narrow Band Optical Filter is designed to transmit light centered at 573nm and FWHM 22nm. Coligh manufactures EUV to IR narrow and wide bandpass filter.
It has features below:
- 573nm center wavelength
- 22nm FWHM
- High Transmission > 90%
- Deep blocking depth OD>=6
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UV-Vis Narrow Bandpass Filter Centered at 573nm Description
573/22nm narrow band optical filter Coligh manufactures is a high-precision optical filter based on multilayer thin film interference technology. It selectively transmits narrowband spectral signals with a central wavelength of 573nm and a bandwidth of 22nm, while efficiently suppressing other bands of ultraviolet, visible light and near-infrared stray light.
- Central wavelength 573+/-1nm, half bandwidth 22+/-1nm, meeting the needs of high-resolution spectral separation.
- The transmittance in the passband is greater than or equal to 90%, suitable for weak light detection scenarios
- Deep cutoff outside the passband, 350-1000nm cutoff depth OD>=6, significantly reducing background noise.
- We use ion-assisted coating and win coating technology to ensure the density, high adhesion and resistance to environmental erosion of the film layer.
- This filter uses low thermal expansion fused quartz as the substrate, and other materials such as B270 K9 are available. We only stock round, square cutting and rolling.
573/22nm Narrow Band Optical Filter Technical Datasheet
| Parameter | Specification |
| Center Wavelength (CWL) | 573nm ± 1 nm |
| Full Width at Half Maximum (FWHM) | 22nm± 1 nm |
| Peak Transmission | 90% |
| Blocking Range | 350-1000nm |
| Optical Density (OD) | OD ≥ 6 outside passband |
| Angle of Incidence (AOI) | 0° +/-5° |
| Surface Quality | 60/40 scratch-dig (per MIL-PRF-13830B) |
| Material Substrate | Fused Silica JGS1 |
| Coating Type | Hard-Coated Interference Filter/ IAD Assisted Coating |
| Thickness | 1mm (typical) |
| Filter Dimensions | Custom sizes available (e.g., Ø12.5 mm, 60×60 mm) |
| Clear Aperture | >90% of physical size |
| Operating Temperature | -40°C to +85°C |
573/22nm Narrow Band Optical Filter Applications
- In vivo brain neuroimaging
The fluorescence emission peak of the genetically encoded calcium indicator is at 570-580nm, and the signal needs to be accurately separated to track neuronal activity. The 573/22nm bandpass filter can be integrated into the detection optical path of the two-photon microscope, and cooperates with the 920nm excitation light to filter tissue autofluorescence. - Wavelength locking of semiconductor lasers
The 573nm distributed feedback laser needs to filter out side mode noise to ensure the output spectral purity. The 573/22nm filter can be embedded in the laser resonator as a wavelength selective feedback element. Improve the accuracy of fiber optic communication and spectral analysis. - Fluorescent labeling of aflatoxin
The fluorescence marker of the aflatoxin immunochromatographic test strip has an emission peak at 573nm, and background interference needs to be eliminated. The 573/22nm optical filter can be carried on a portable fluorescence detector and cooperated with a UV LED light source to extract the target signal. - UAV hyperspectral agricultural monitoring
The 573nm band is sensitive to plant nitrogen content and can invert the nutritional status of crops. The 573/22nm filter can be integrated into the green light channel of a hyperspectral camera and combined with the NDVI index algorithm to generate a farmland nutrient distribution map.
