1.Product Descriptions:
| Characteristics: | 660nm Bandpass Filter |
| Type: | Interference type |
| Central Wavelength (CWL): | 660+-5nm |
| Full Width at Half Maximum(FWHM): | 10/30/40/70/75nm |
| Peak Transmittance(%) : | BP660-10nm:>97%BP660-30nm:>88%BP660-40nm:>70%BP660-70nm:>90%BP660-75nm:>90%BP660-75+AR:>95% |
| Surface Quality: | 60/40 scratch-dig |
| Optical Density (OD): | OD2-OD3 |
| Color: | Red |
| 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 – 660 Bandpass filter:
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| Picture 1: BP660-10nm Spectral Graph measurement |
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| Picture 2: BP660-30nm Spectral Graph measurement |
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| Picture 3: BP660-40nm Spectral Graph measurement |
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| Picture 4: BP660-70nm Spectral Graph measurement |
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| Picture 5: BP660-75nm Spectral Graph measurement |
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| Picture 6: BP660-70nm +AR Spectral Graph measurement |
3.What is typical application for 660nm bandpass filters?
A 660nm bandpass filter is a precision optical component. It selectively transmits light within a narrow wavelength band centered at 660nm in the red visible spectrum, and blocks all ultraviolet, other visible and near-infrared light outside the passband. Typical application for 660nm bandpass filter is very broad, include fluorescence detection, biological microscopy, flow cytometry and biochemical analysis. It is also used in medical optical equipment, plant growth monitoring, spectral analysis and industrial photoelectric sensing. It filters out interfering light to improve signal purity and measurement accuracy.
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:
640nm Bandpass Filter, 640nm CWL,20nm FWHM,Support Customized
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.
