Product Descriptions:
| Characteristics: | 420nm Bandpass Filter |
| Type: | Bandpass Filter |
| Central Wavelength (CWL): | 420+-5nm or specified* |
| Full Width at Half Maximum(FWHM): | 40nm or specified |
| Peak Transmittance(%) : | >80% or specified |
| Surface Quality: | 60/40 scratch-dig or specified |
| Optical Density (OD): | OD2-OD4 or specified |
| Color: | Blue |
| Shape： | Square, Round, Irregular Shape |
| Dimension(mm): | specified** |
| Thickness(mm): | specified*** |
| Substrate: | Ultra-clear glass,K9,BK7,B270,D2637T, Quartz Glass(Fused Silica) or other specified |
| Remark： Spectral range:200-1200nm *Customized capability: 380-2500nm, stock for 10nm intervals. **Common for 86x86mm, 80x80mm, other can customized, max. 300x300mm *** Thickness available: 0.21、0.3、0.55、0.7、1.0、1.1、1.5、1.8、2.0、3.0mm…etc. | |
Measured Spectral Graph – 420nm bandpass filters:
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| Picture 1: BP420-40nm Spectral Graph |
What is typical application for 420nm Bandpass Filter?
A 420nm bandpass filter is a narrowband optical interference filter, typically fabricated via ion-assisted electron beam evaporation or magnetron sputtering, designed to selectively transmit a specific spectral region centered at 420nm while rejecting out-of-band radiation. Typical application for 420nm bandpass filter is very broad, including fluorescence microscopes and biochemical fluorescence detection, UV spectral analysis instruments, industrial UV defect inspection and optical sensing, medical diagnostic optical equipment, Near-UV light source calibration and detection systems.
What is key parameter when choose for right bandpass filters?
When selecting a bandpass filters, the center wavelength (CWL) will be one of key parameter to be designated, it refer to the wavelength at which the filter achieves maximum transmission. Secondly, Peak and Average Transmittance, typically ≥80–95%, higher transmittance might need Anti-reflective(AR) coating. Third, full width at half maximum (FWHM). Forth, Blocking Range & Depth. Fifth, substrate material, e.g., BK7, B270, fused silica, colored glass. Sixth, surface quality, e.g., 60/40, 40/20. Seventh, Size & Shape, etc.
Shenzhen Hengda Liyuan Optoelectronics introduced advanced optical technology that apply depositing nanomaterials through ion-assisted evaporation onto a multilayer hard film in a high vacuum environment which coating layer is firm and has good tightness, and small bandwidth drift. Liyuan optoelectronics have been focus on optical coating for more than 17 years and offer one-stop optical filters solution including Narrow Bandpass Filters, IR cut-off Filters, Longpass & Short Filters, Notch Filters, ND filters, Star filters and Optical sapphire block.
Other typical Bandpass filters in stock from Liyuan Optoelectronics include BP810 BP820 BP830 BP840 BP850 BP860 BP870 BP880 BP890 BP…etc.
