Linear variable filters are bandpass filters that change center wavelength across one dimension of the part. They can be used as simple spectrometers or in order-sorting applications. These elements are very useful for Hyperspectral Imagers

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Signal filter

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Omega has been manufacturing UV filters for more than 85 years. UV light (in the 200 nm - 400 nm range) has many commercial and consumer-level applications. UV light can be used in photolithography or dentistry to photoset polymers, and in biomedical applications to excite molecules during surgery. It can be used to measure DNA and to sterilize our water and the air we breathe.

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Acousto-optic tunable filter

Omega routinely produces filters which selectively transmit or reject wavelength bands of less than 1nm and even less than 0.1nm

CCD detectors are pixelated silicon sensors. Charge collected in a pixel is shifted horizontally and vertically, and converted into a voltage measurement.  The CCDs used in our research have extremely low noise, allowing them to measure very small signals.

Omega Optical has the capability to produce traditional Bandpass and Notch filters in the near-infrared (NIR), shortwave (SWIR), mid-wave (MWIR), long-wave (LWIR), and far infrared (FIR).

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Dichroic filters, also known as dichroic mirrors, are specialized optical filters that selectively transmit light of certain wavelengths while reflecting others. They are designed to work at specific angles of incidence, typically at 45 degrees.

A specialized version of a short-pass filter, typically designed to transmit the ultraviolet (UV) or visible (VIS) portion of the spectrum while reflecting longer infrared (IR) wavelengths.

Opticalfilter

Longpass filters (sometimes called edge filters, long pass, long-pass, or LP) transmit wavelengths above (LP) a certain wavelength. This wavelength is called a cuton wavelength for longpass filters. LP filters can be used instead of bandpass filters in fluorescence applications to maximize signal when using a single fluorescent label, or to block the laser in Raman applications.

Shortpass filters (sometimes called edge filters, short pass, Short-pass, or SP) transmit wavelengths below (SP) a certain wavelength. This wavelength is called a cutoff wavelength for shortpass filters. SP filters are often used in digital cameras to block undesired near-infrared (NIR) signals from reaching the camera. These types of filters are often called hot mirrors.

Optical filters and dichroics operate based on thin-film interference. Multiple layers of dielectric materials with varying refractive indices are deposited on to a substrate using evaporation or sputtering. The constructive and destructive interference of light waves at these layers results in selective reflection and transmission of different wavelengths.

A specialized version of a long-pass filter, typically designed to reflect the ultraviolet (UV) or visible (VIS) portion of the spectrum while passing longer infrared (IR) wavelengths.

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ND filter

Optical Filters and Dichroics are components which are used to transmit or block specific wavelengths of light, for the purpose of controlling light in an optical system.

Reflective ND filters provide a linear spectral transmission across the visible region. They control light intensity without selectively absorbing energies at specific wavelengths. They are, therefore, generally used to attenuate the intensity of a beam of light over a broad spectral region. This property is often required to prevent saturation or damage to a wide variety of detectors and even the human eye.

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Tunableopticalfilter

The iconic Ring Light by Lee Broom is relaunched as a brand new full-LED product for 2023. Featuring a polished gold sphere pierced by a dimmable LED tube to ...

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Multi-band filters and dichroics are used when an optical system design cannot support multiple filters. These multi-band filters can be configured as bandpass or notch (band-reject) for desired ranges, and in dual, triple, quad, penta or even octo-band (8 bandpasses!).

IR filter

Bandpass filters (also called band pass filters, BP filters or band-pass filters) have been a mainstay of Omega's business since the early days when we produced some of the first bandpass filters for supermarket scanners back in the mid-1970s. They are designed to have high transmission over a certain wavelength range while blocking light from other wavelengths to provide good signal-to-noise in the transmitting region.

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In applications which demand spectral selectivity on the entrance or exit of a fiber, Omega has a solution to deposit one or more filter recipes to a fiber (or fiber bundle).

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Patterned filters are useful in applications where lateral space constraints require discrete wavelength selection. This is often the case with Earth Observation filters.