The 400nm + Infrared Dual Bandpass Optical Filter is a precision
coated optical glass filter designed to transmit two separate
wavelength regions while suppressing unwanted light
between and outside the passbands.
The filter provides a transmission band around400nm together
with a definedinfrared wavelength band, allowing selected
short-wavelength and infrared signals to pass through the same optical component.
A multilayer dielectric coating provides high transmission
within the designed passbands and strong out-of-band blocking,
making the filter suitable for optical instruments, sensors and imaging systems.
The standard configuration isØ12.7 × 1.1mm,
while custom dimensions, shapes and wavelength combinations are available.
| Parameter | Specification |
|---|---|
| Filter Type | Dual Bandpass Optical Filter |
| First Passband | Around 400nm |
| Second Passband | Infrared Band |
| Substrate | Optical Glass |
| Coating | Multilayer Optical Coating |
| Transmission | High Transmission in Passbands |
| Blocking | High OD Blocking Outside Passbands |
| Standard Size | Ø12.7 × 1.1mm |
| Shape | Round / Square |
| Thickness | 1.1mm / Custom |
| Size | Custom Available |
| Application | Optical Instruments / Sensors / Imaging |
Unlike a conventional single-bandpass filter, this optical
filter is designed to transmit two separated wavelength regions.
The first transmission region is located around400nm,
while the second transmission region is located within a specified infrared range.
The wavelength separation between the two passbands
allows unwanted intermediate spectral components to be suppressed.
This dual-band design can be useful when an optical system
needs to detect or transmit signals from two different spectral regions using a single filter.
The first transmission band is centered around the400nm spectral region.
This short-wavelength transmission band can be configured
according to the optical system's requirements.
The filter is suitable for optical systems that need selective
transmission around the 400nm region while suppressing
unwanted wavelengths outside the designed passband.
The second transmission window is designed for a specified infrared wavelength range.
Because the exact IR wavelength was not specified for this product,
the infrared band can be customized according to the customer's application.
Customers can provide:
for a customized filter design.
The filter is designed to providehigh optical density blocking outside the required passbands.
In particular, the filter can suppress unwanted spectral components between
the 400nm and infrared transmission regions.
This can help reduce background light and improve the spectral
selectivity and signal-to-noise characteristics of optical detection systems.
The filter uses a precisionmultilayer dielectric optical coating.
The coating is designed to provide:
The coating design can be customized for different
wavelength combinations and optical applications.
The filter uses a high-quality optical glass substrate with precision polished surfaces.
Optical glass provides a stable platform for the multilayer
coating and can be processed into different sizes and shapes.
The standard configuration is:
Ø12.7 × 1.1mm
Custom dimensions are available for OEM optical assemblies.
Different optical instruments require different spectral configurations.
Our dual bandpass filter can be customized according to:
This makes the product suitable for both standard optical components and OEM optical systems.
The dual-band filter can be integrated into optical instruments that
require selective transmission of both short-wavelength and infrared signals.
The filter can help sensors selectively detect signals from two
different spectral regions while suppressing unwanted background light.
Dual-band optical filtering can be used in imaging systems
where information from both approximately 400nm and infrared wavelengths is required.
The filter can be incorporated into optical detection systems
requiring separated spectral transmission windows.
Its dual-passband structure can be used in customized
optical measurement and analytical instruments.
Transmits two separated wavelength regions through one optical filter.
Combines a short-wavelength band around 400nm with a defined infrared band.
Suppresses unwanted wavelengths between and outside the passbands.
Provides stable and precise spectral filtering characteristics.
Suitable for optical instruments, imaging systems and sensors.
Wavelengths, bandwidths, dimensions, thickness and shapes can be customized.
A dual bandpass filter is an optical filter designed to
transmit two separate wavelength regions while blocking
wavelengths outside those transmission bands.
The standard design transmits a wavelength region around400nmand a definedinfrared band.
The exact IR wavelength was not specified for this standard product.
The infrared transmission band can be customized according to the customer's application.
The standard specification isØ12.7 × 1.1mm.
Yes. Custom diameter, length, width and thickness are available.
Yes. The infrared center wavelength and bandwidth
can be designed according to the optical system.
The filter is designed to suppress unwanted wavelengths
between and outside the two transmission bands.
The exact blocking range depends on the final coating design.
The standard substrate isoptical glass.
Yes. Round and square formats are available.
Yes. Custom wavelength combinations, dimensions,
coating specifications and mechanical configurations can be provided for OEM applications.
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