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473/15nm Narrow Band Interference Filter
473/15nm Narrow Band Interference Filter is designed to transmit light centered at 473nm and FWHM 15nm. Coligh manufactures hard coated interference filter.
- 473nm center wavelength
- 15nm FWHM
- High Transmission > 90%
- Deep blocking depth OD>=6
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473nm 15nm FWHM Bandpass Interference Filter Description
473/15nm Narrow Band Interference Filter Coligh manufactures is an optical filter based on the principle of multilayer thin film interference.
- We use a precisely designed dielectric film structure and alternately coat high refractive index (such as Ta₂O₅, TiO₂) and low refractive index (such as SiO₂, MgF₂) dielectric films to achieve the function of narrowband spectral selection.
- We use ion-assisted deposition coating technology, and the film layer has density, high adhesion and environmental stability
- The central wavelength is 473+/-1nmnm and the bandwidth is 15nm+/-1nm FWHM. The transmittance is greater than 90% in the passband transmission section, and the cutoff depth OD>=6 in the range of 350-1000nm outside the passband. It has a very real cutoff for the ultraviolet band, visible band and near-infrared band, which is suitable for fluorescence detection, laser systems, biological imaging, spectral analysis and other fields.
- We use JGS1 as the substrate, which can support circular and square cutting
473/15nm Narrow Band Interference Filter Technical Datasheet
| Parameter | Specification |
| Center Wavelength (CWL) | 473 nm ± 1 nm |
| Full Width at Half Maximum (FWHM) | 15nm± 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 |
473/15nm Narrow Band Interference Filter Applications
- Biomedicine
Calcium ion probes emit green fluorescence under 473nm excitation, which requires high-purity excitation light and precise fluorescence collection, but the spontaneous fluorescence of biological tissues at 400-500nm will cause background interference. This filter can be integrated into the excitation section or emission end of the two-photon microscope optical path to ensure the purity of the excitation light, improve the signal-to-noise ratio of imaging, and dynamically monitor the fluorescence imaging of calcium ions in vivo - Industrial inspection
After the microcracks on the surface of the wafer are marked by 473nm excitation of fluorescent dyes, high-contrast imaging is required to locate the defects, but the ambient light, especially 450-500nm, has serious interference. The 473/15nm filter can be embedded in the automatic optical inspection system to improve the defect detection speed and defect detection rate - Laser technology
Diode-pumped solid-state lasers (DPSS) need to suppress non-target wavelength oscillations such as 1064nm fundamental frequency light to ensure the stability of 473nm blue laser output. This filter can be inserted into the resonant cavity as a wavelength selection element to only allow light near 473nm to pass through, extending the service life of the laser
