Product Descriptions：
| Characteristics: | 810nm Shortpass Filter |
| Type: | Interference type filter |
| Cut-off Wavelength(in mm): | 810 nm |
| Average Transmittance(%) : | >90% |
| Surface Quality: | 60/40 scratch-dig |
| Optical Density (OD): | OD2-OD3 |
| Color： | Transparent |
| 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：
(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: 810nm Shortpass Filter Spectral measurement |
What is typical application for 810nm shortpass filters?
An 810nm shortpass filter is an optical component that transmits light with wavelengths shorter than 810nm and blocks light with wavelengths longer than 810nm. Typical applications of 810nm shortpass filter:
- Fluorescence Excitation Spectroscopy: Ensures the required short-wave excitation light reaches the sample while blocking long-wave stray light, improving signal-to-noise ratio and accuracy.
- Raman Spectroscopy: In near-infrared excitation systems, it filters out low-frequency noise from the excitation light and Rayleigh scattering, allowing only the signal light to pass through.
- Imaging & Machine Vision: Blocks near-infrared interference from ambient light sources that can affect CMOS or CCD sensors, preventing color distortion or blurring, and delivering images with truer color and higher contrast.
- Laser Therapy & Aesthetics: In IPL and similar devices, it removes long-wave infrared light that can cause thermal damage to the epidermis, while retaining the effective short-wave therapeutic light.
- Stage Lighting: Extracts pure short-wave color components from white light to achieve specific lighting effects.
What is key parameter when choose for suitable shortpass filters?
When selecting shortpass filters, normally the following factors need to be taken into consideration：
- Cut-off Wavelength: refers to the designated intermediated wavelength (e.g. 650nm) at transition from transmission to reflective zone, and measure at 50% transmittance.
- Peak or Average Transmittance(in %): typically ≥90%, Higher transmittance might need Anti-reflective(AR) coating.
- Blocking rate: usually in terms of optical density(OD), OD2-OD3 for standard and higher blocking rate 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:
730nm Shortpass Filter, 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 IR cut-off filters in stock from Liyuan Optoelectronics: IR600 IR630 IR650 IR680 IR700 IR730 IR750…etc.
