Filter types include Fluorescence, Bandpass (Narrow- and Multi-Band), Edge (Shortpass and Longpass), Notch, Dichroic, Neutral Density (ND) and Polarizing
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Hard-Sputtered, Traditional Soft Coatings, and a Variety of Colored Glass and Plastic Options Available
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Edmund Optics® manufactures and supplies optical filters to a wide variety of life science applications, including medical diagnostics and biotechnology, as well as industrial applications such as semiconductor, metrology, aerospace, automation, and robotics.
Precision optical filters are used to block, transmit, and reflect selected wavelengths, called wavebands, from light sources including lasers, LEDs, and broadband illumination sources. Precision optical filters enable such diverse applications as fluorescence microscopy, flow cytometry, factory automation, optical character recognition (OCR), and autonomous vehicles.
See also Notch Filter , Filter , Full Width at Half Maximum (FWHM) , Cavity , Central Wavelength (CWL)
See also Cavity , Blocking Range , Optical Density (OD)
See also Filter , Cut-On Wavelength
In filter terminology, cut-on is the wavelength at which the transmission increases to 50% throughput in a longpass filter.
See also Cut-Off Wavelength
See also Cold Mirror , Cavity , Central Wavelength (CWL) , Stopband , Longpass Filter , Neutral Density Filter (ND) , Rugate Notch Filter , Heat Absorbing Glass , Notch Filter , Peak Transmittance , Shortpass Filter , Full Width at Half Maximum (FWHM) , Bandwidth , Fluorescent Filter , Hot Mirror , Dichroic Filter , Cut-Off Wavelength , WRATTEN Filter , Cut-On Wavelength , Interference Filter , Dichroic Coating
A specific wavelength region of the bandwidth of a filter defined by the two points of the passband where transmittance is 50% of the peak.
See also Filter , Bandwidth , Central Wavelength (CWL)
A type of filter in which the transmission band is a region of longer wavelengths as compared to the region blocked.
See also Shortpass Filter
A type of filter that yields a constant value for attenuation, or optical density, over a bandwidth (i.e. spectrally flat). It is useful for attenuating, or reducing, overall light in a system.
A type of filter designed to block a pre-selected bandwidth and transmitt all other wavelengths within the design range of the filter. Notch filters are manufactured using the dielectric stack method which involves using a series of thin layers of dielectric materials, of alternating refractive index.
Optical density is a value that describes the amount of energy that can pass through an optical material. It is directly related to the transmittance of the material. The greater the OD, the more light being blocked.
See also Continuously Variable Apodizing Filter , Blocking , Neutral Density Filter (ND)
The highest transmittance value for light being passed by a filter.
See also Filter
The wavelength of light that has the highest transmittance value.
Radiation that changes direction, but not wavelength, after contact with a material surface.
See also Transmission , Parity
A type of filter where the transmission band is a wavelength range of shorter wavelengths, typically lower than the region blocked.
See also Filter , Longpass Filter
The amount of radiant energy that passes through an optical medium, not being absorbed, reflected, or scattered.
See also Reflection
The peak to peak distance covered by one cycle of an electromagnetic wave. It is inversely related to frequency. The longer the wavelength, the lower the frequency; conversely, the shorter the wavelength, the higher the frequency.
Optics are crucial to many advanced diagnostics techniques and technologies that are used to analyze blood. Beamsplitters and various types of filters, such as bandpass, dichroic, longpass, and shortpass filters, are only a few of the most prominently utilized.
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