The 840nm 10nm FWHM OD4 Narrow Bandpass Optical Filter is designed for
near-infrared optical systems requiring precise wavelength
selection and strong rejection of unwanted spectral components.
With acenter wavelength of 840nmand a10nm FWHM bandwidth,
the filter provides a narrow transmission window around the target wavelength.
TheOD4 blocking performancehelps suppress out-of-band light and reduce
unwanted spectral interference, making the filter suitable for
optical detection and imaging systems where spectral accuracy is important.
The filter is manufactured from high-quality optical glass and finished
with a multi-layer optical coating for stable optical performance.
Designed for precise wavelength selection around840nm, suitable for near-infrared optical systems.
The 10nm FWHMprovides a controlled spectral transmission
window for applications requiring narrowband optical filtering.
The OD4 blocking depthprovides strong suppression of unwanted
out-of-band light and helps reduce stray-light interference.
The optical coating is designed to provide high transmission within the target passband.
High-quality optical glass provides a stable substrate for precision
optical coating and integration into optical instruments.
The multi-layer coating provides controlled spectral performance and long-term wavelength stability.
Round and square shapes are available, while custom dimensions and
other wavelengths can be manufactured according to application requirements.
| Parameter | Specification |
|---|---|
| Product Type | Narrow Bandpass Optical Filter |
| Center Wavelength (CWL) | 840nm |
| FWHM | 10nm |
| Blocking Depth | OD4 |
| Substrate | Optical Glass |
| Coating | Multi-Layer Optical Coating |
| Passband | 840nm |
| Transmission | High transmission at passband |
| Out-of-Band Blocking | OD4 |
| Shape | Round / Square |
| Size | Custom Available |
| Thickness | Custom Available |
| Other Wavelengths | Available upon request |
| Application | Machine Vision, NIR Sensing, Optical Measurement, Industrial Inspection |
The 840nm center wavelength and 10nm FWHM bandwidth provide
controlled transmission for systems requiring narrow spectral selection.
OD4 blocking helps suppress unwanted
wavelengths outside the target transmission region.
Strong spectral blocking can help reduce unwanted optical signals
reaching the detector, supporting cleaner measurement and detection.
The optical glass substrate and multilayer coating are designed for
stable performance during long-term optical system operation.
The narrowband design is suitable for applications
requiring accurate wavelength discrimination.
The 840nm filter can be integrated into machine vision systems
requiring controlled near-infrared wavelength selection.
Suitable for NIR sensors and detection systems designed around the 840nm spectral region.
Can be used in optical measurement equipment requiring
narrowband spectral filtering and unwanted-light suppression.
Suitable for optical detectors and sensing systems
where out-of-band light needs to be reduced.
Can be integrated into industrial inspection equipment requiring stable NIR spectral selection.
Suitable for imaging systems that require a defined near-infrared wavelength band.
Can be used in laboratory and analytical optical
instruments requiring narrowband wavelength selection.
Custom dimensions, thicknesses and wavelength
specifications are available for optical equipment integration.
We support customized narrow bandpass filters for different optical system requirements.
Customization options include:
For an accurate quotation, please provide:
Center Wavelength + FWHM + OD/Blocking
Requirement + Size + Thickness + Quantity + Application
If you have an optical transmission curve or drawing,
you can send it to us for engineering review.
A typical production process includes:
Optical Glass Selection → Cutting → Grinding → Polishing
→ Cleaning → Multilayer Coating → Spectral Testing →
Dimensional Inspection → Edge Processing → Final QC → Protective Packaging
The manufacturing process can be adjusted according to
the customer's optical and mechanical requirements.
Quality inspection can include:
Inspection requirements can be defined according to the final customer specification.
Each filter is individually protected to reduce the risk of scratches,
dust and mechanical damage.
Packaging solutions are available for:
Custom labeling and OEM packaging are also available.
The center wavelength is840nm.
The specified FWHM is10nm.
OD4 indicates a specified optical density level of 4 for the
applicable blocking region, corresponding to strong
attenuation of unwanted out-of-band light.
The filter usesoptical glassas the substrate.
It uses amulti-layer optical coating
designed for the specified spectral performance.
Yes. Custom sizes, thicknesses, shapes and other wavelength specifications are available.
Yes. Other wavelengths can be manufactured according
to the customer's application requirements.
Yes. Different bandwidth requirements can
be discussed based on the optical system specification.
Typical applications includemachine vision, NIR sensing,
optical measurement, optical detection and industrial inspection.
Please provide thecenter wavelength, FWHM, blocking/OD
requirement, filter size, thickness, quantity and application.
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