1.Product Descriptions:
| Characteristics: | BP500-650/900-1800+AR Dual Bandpass Filter |
| Type: | Interference type filter |
| Center Wavelength(CWL): | 500nm ± 5nm, 900nm ± 5nm |
| Peak Transmittance(%) : | >90% |
| Full Width at Half Maximum(FWHM): | specified |
| Optical Density (OD): | OD2 – OD3 |
| Shape: | Round, Square, Custom Shape |
| Color: | Green |
| Angle of Incidence(AOI) | specified |
| Surface Quality: | 60/40 scratch-dig |
| Dimension(mm): | Specified** |
| Thickness(mm): | specified |
| Substrate: | Ultra-clear glass,K9,BK7,B270,D2637T, Quartz Glass(Fused Silica) or other specified. |
| Remark： (1)Customized capability: 380-2500nm, stock for 10nm intervals. (2) Size customized: 86x86mm, 80x80mm, other can customized, max. 300x300mm (3) 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 – BP500-650/900-1800+AR Dual Bandpass Filter:
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| Picture 1: BP500-650/900-1800 +AR Dual Bandpass Filter Spectral Graph measurement |
3.What is BP500-650/900-1800 +AR Dual Bandpass Filter？
BP500-650/900-1800 +AR Dual Bandpass Filter is a precision optical dual-bandpass filter that simultaneously transmits two specific spectral bands while blocking all out-of-band light. The +AR denotes an anti-reflection coating on one or both surfaces to maximize in-band transmission and minimize reflection losses.
4.What is typical application for bandpass filters?
Typical application for bandpass filters are very broad, include environmental monitoring, biomedical and chemical sensing, biometric sensors, color separation in sensors, target designation and range finding, missile warning systems, surveillance and reconnaissance, laser protection, machine vision and industrial inspection…etc. Bandpass filter is almost always a critical enabling component. Their versatility drives innovation in science, industry, medicine, and daily technology.
5.What is key parameter when choose for right Dual Bandpass Filters?
When selecting a Dual Bandpass Filter, normally the following factors need to be taken into consideration：
- Central Wavelength (CWL)：Firstly, CWL is one of key parameter to designate, 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): it 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:
650&850nm Dual Bandpass Filter, 40nm FWHM,Day&Night Optical Filter
Shenzhen Hengda Liyuan Optoelectronics introduced advanced optical 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 & Short Filters, Notch Filters, ND filters, Star filters and Optical sapphire block.
