505/8nm Dielectric Bandpass Filter
505/8nm dielectric bandpass filter is an optical filter optimize for the light centered at 505nm and FWHM 8nm. Coligh manufactures EUV to 30000nm optical filters.
- Center wavelength 505nm
- FWHM 8nm
- Transmission peak ≥75%
- Blocking depth OD5
Products Categories
Get A Free Quote
505/8nm Dielectric Optical Interference Bandpass Filter
The 505/8nm dielectric bandpass filter is a high-performance optical filter based on multilayer dielectric film technology.
- The central wavelength is 505+/-2nm, and the half bandwidth is 8+/-2nm, which can accurately match the excitation/emission peaks of fluorescent dyes FITC derivatives, Cy2, quantum dots, and the peak wavelengths of blue-green LEDs/LDs.
- The transmittance is over 75% in the range of 505+/-4nm, which can optimize the light energy output of the target band.
- The passband cutoff is OD5 in the range of 200-1100nm, which can effectively block ultraviolet, red and near-infrared light.
- We use a dielectric coating method with a multilayer film stack design, and high-quality fused quartz and optical glass K9 B270 as the substrate, making the 505/8nm Dielectric Bandpass Filter a core optical component in the fields of fluorescence imaging, industrial detection, and environmental monitoring.
505/8nm Dielectric Bandpass Filter Technical Datasheet
| Parameter | Specification |
| Center Wavelength | 505nm ± 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 |
505/8nm Dielectric Bandpass Filter Applications
- Fluorescence imaging
In dynamic tracking of living cells, the weak signal of 505nm excitation peak of some GFP variants is easily interfered by stray light of broad-spectrum light sources, resulting in accelerated photobleaching and blurred images. Ultraviolet light and other visible light bands increase phototoxicity and shorten cell survival time. The 505/8nm bandpass filter can only allow narrow-band light of 505±4nm to pass through, efficiently excite the target fluorescent probe, and reduce the light damage of non-target wavelengths to the sample. - Flow cytometry
In multicolor immunophenotyping and rare cell sorting tests, the 505nm channel is easily interfered by 488nm laser scattered light, resulting in signal overlap. The 505/8nm narrowband filter can filter out the non-target wavelength of 488nm at the transmitting end, allowing only 505±4nm fluorescence to pass through, minimizing optical crosstalk - Machine vision
In semiconductor wafer defect detection, the micron-level metal residues and oxide layer cracks on the surface of the semiconductor wafer have significant differences in reflectivity under 505nm blue-green light, but the ambient light of the production line interferes with imaging. The 505/8nm optical filter can allow 505nm light to penetrate the thin film layer, and the brightness difference of the defective area is increased by 5 times. - Optical communication
In underwater optical communication, 505nm has the lowest attenuation coefficient in seawater, but the wide-spectrum light source contains redundant wavelengths, resulting in underwater communication errors. The 505/8nm filter can filter out non-505nm wavelengths, reduce water scattering, and increase transmission distance.
