Product Descriptions:
| Characteristics: | 495nm Bandpass Filter + Anti reflective (AR) coating |
| Type: | Interference type |
| Central Wavelength (CWL): | 495+-5nm |
| Full Width at Half Maximum(FWHM): | 40nm |
| Peak Transmittance(%) : | >92% (AR coating) |
| Cut-off depth: | OD2-OD3 |
| Shape: | customized |
| Color: | Green |
| Surface Quality: | 60/40 |
| Dimension(mm): | Common for 86x86mm, 80x80mm, other can customized, max. 300x300mm |
| Thickness(mm): | 0.21、0.3、0.55、0.7、1.0、1.1、1.5、1.8、2.0、3.0mm, etc. |
| Substrate: | ultra-clear glass,K9,BK7,B270,D2637T, Quartz Glass(Fused Silica) or other specified. |
| Remark: Customized capability: 200-2000nm. | |
Spectral measurement graph
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| Picture 1: BP495-40nm +AR Spectral Graph measurement |
What is typical application for 495nm Bandpass Filters?
A 495nm bandpass filter is an optical filter designed to selectively transmit blue-green light centered around the 495nm wavelength while blocking light at all other wavelengths.
A 495nm bandpass filter is most typically used in fluorescence microscopy as an excitation filter to precisely isolate light for fluorophores, enabling clear imaging without spectral crosstalk. Additionally,It is also widely employed in flow cytometry for accurate cell sorting, in spectroscopy for Raman and laser-based analysis, and in astronomy to enhance planetary contrast by suppressing unwanted background light.
What are key parameters when choose for a suitable Bandpass Filter?
When selecting a Narrow Bandpass Filter, normally the following factors need to be taken into consideration：
- Central Wavelength (CWL)：CWL is one of key parameter to designate first, it refer to the central wavelength at stable high transmission rate passband.
- Peak or Average Transmittance: typically ≥90%, Higher transmittance might need Anti-reflective(AR) coating.
- Full width at half maximum (FWHM): FWHM refer to the interval between the two wavelength points where the transmittance rate reaches 50%.
- Blocking rate: usually in terms of optical density(OD), OD2-OD3 for standard and higher will be OD4-OD6 per requirement.
- Angle of Incidence (AOI): AOI need to be considered as Interference Filter is angle sensitive, 0° AOI by default, other AOI e.g. 30/45° need to be specified.
- Physical and environmental requirement: Substrate type, dimensions and thickness, surface quality, and environmental durability.
Related products:
490nm Bandpass Filters, 490nm CWL, 35nm FWHM, Support Customized
500nm Bandpass Filter, 500nm CWL, 45nm FWHM, Support Customized
Shenzhen Hengda Liyuan Optoelectronics introduced advanced optical vacuum technology that apply depositing nano-materials 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. Besides, Liyuan optoelectronics have been focus on optical coating for more than 17 years ,and the company offer one-stop optical filters solution including Narrow Bandpass Filters, IR cut-off Filters, Longpass Filters, Shortpass Filters, Notch Filters, ND filters, Star filters and Optical sapphire block.
