Product Descriptions：
| Characteristics: | IR690 cut-off filter |
| Cut-off Wavelength(in mm): | 690 nm |
| Peak Transmittance(%) : | >90% |
| Optical Density (OD): | OD2-3 |
| Dimension(mm): | Diameter 17.8 mm |
| Thickness(mm): | 1.0 mm |
| Substrate: | Ultra-clear glass,K9,BK7,B270,D2637T, Quartz Glass(Fused Silica) or other specified. |
| Remark： (1) Spectral range:380-1100nm (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 | |
Measured Spectral measurement
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Picture 1: IR690nm Spectral measurement |
What is typical application for 690nm bandpass filters?
What is key parameter when choose for Infrared (IR) cut-off filter?
When selecting a Infrared (IR) cut-off filter, the cut-off wavelength is designed at 50% transmittance. It’s one of key parameter to be designated, with a tolerance of generally +/-5nm or +/7nm which depend on the user inquiry. Secondly,Peak and Average Transmittance, e.g 90%,95%…etc. higher transmittance might need Anti-reflective(AR) coating.
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 Fitlers, IR cut-off Filters, Longpass & Short Filters,Notch Filters, ND filters, Star filters and Optical sapphire block.
other IR cut-off filters in stock from Liyuan Optoelectronics: IR600 IR630 IR650 IR680 IR700 IR730 IR750…etc.
