1.Product Descriptions:
| Characteristics: | 950nm Bandpass Filter |
| Type: | Interference type |
| Central Wavelength (CWL): | 950+-5nm |
| Full Width at Half Maximum(FWHM): | 45/55/80/100nm |
| Peak Transmittance(%) : | BP950-45nm:>92% BP950-55nm:>85% BP950-80nm:>88% BP950-100nm:>92% |
| Surface Quality: | 60/40 scratch-dig |
| Optical Density (OD): | OD2-OD3 |
| Color: | Black |
| 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:350-1100nm *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. |
2.Measured Spectral Graph – 950nm Bandpass filter:
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| Picture 1: BP950-45nm Spectral Graph measurement |
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| Picture 2: BP950-55nm Spectral Graph measurement |
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| Picture 4: BP950-80nm Spectral Graph measurement |
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| Picture 6: BP950-100nm Spectral Graph measurement |
3.What is typical application for 950nm bandpass filters?
A 950nm bandpass filter is a high-precision optical component that selectively transmits light in a narrow wavelength range centered at 950nm within the near-infrared spectrum, while blocking all ultraviolet, visible light and other out-of-band near-infrared rays. Typical application for 950nm bandpass filter is very broad, include infrared sensing, night vision devices, biometric recognition and access control systems. It also fits laser ranging, industrial photoelectric detection, smart device sensors and medical optical equipment. By filtering ambient stray light, it stabilizes signal transmission and improves overall detection precision.
4.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:
935nm Bandpass Filter, 935nm CWL, 40nm FWHM, OD2,unmounted optical infrared bandpass filter
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.
