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ThorlabsNotch Filter

The Monchromator-F, and the monochromatic LED light sources LS-MC1 and Hyperchromator have been developed to perform clean spectral isolation in a large range of wavelengths, whereby the Hyperchromator has been designed especially for the light source XWS-30 from ISTEQ.

An optical notch filter, also known as a band-stop or band-rejection filter, is a device that selectively blocks or attenuates a narrow range of wavelengths in an optical spectrum while transmitting all others. It is commonly used in applications such as laser systems, spectroscopy, and optical instruments where specific unwanted light needs to be eliminated.

Our products are based on the principle of modularity. This allows them to be combined and extended to meet your precise needs, or customized to meet individual requirements.

Optical notch filterfor sale

Any fiber-coupled light source, e.g. an LED or laser-pumped plasma light source, can be connected to this compact, software-controlled fiber-to-fiber monochromator. As a result of high light throughput, a flexible, tunable point light source with high luminance is obtained at the output fiber.

Optical notch filterprice

The operation of an optical notch filter is based on the interference of light. The filter consists of multiple layers of dielectric materials coated onto a glass or polymer substrate. Each layer has a different refractive index, and they are designed to create constructive and destructive interference for specific wavelengths of light.

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When light waves encounter the dielectric layers, some are reflected and others are transmitted through each layer. The reflected beams interact with the beams reflected from adjacent layers, leading to interference. For the target wavelength range, the reflected waves combine destructively, effectively canceling each other out and resulting in attenuation of those specific frequencies. In contrast, wavelengths outside the target band are either not affected or they interfere constructively, thus being allowed to pass through the filter with minimal attenuation.

RFnotch filter

Overall, optical notch filters are essential components in a variety of optical systems, where precise control over the wavelength content of light is required. Their design and implementation are based on advanced optical coating technologies that enable the precise targeting of specific wavelengths for rejection while maintaining high transmission for all other wavelengths.