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Neutral Density Filter

Filter

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 Neutral density filters (ND filters) are commonly used in imaging or laser applications to avoid damage to camera sensors or other optical components caused by strong light. An ND filter absorbs or reflects untransmitted light to evenly reduce the transmittance of a portion of the spectrum.
Shortpass Filter

Filter

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 <span style="box-sizing: border-box; color: rgb(51, 51, 51); font-family: Arial, "Microsoft YaHei", "\5FAE软雅黑", "\5B8B体", "Malgun Gothic", Meiryo, sans-serif; font-variant-numeric: normal; font-variant-east-asian: normal; line-height: 26px; font-size: 16px;">Shortpass filter has the advantages of wide cut-off band, deep cut-off depth, high conversion steepness and high transmittance. It can be widely used in fluorescence excitation spectroscopy measurement, Raman spectroscopy application, spectral grouping application, and astronomical observation application, etc. It can also be widely used in imaging optical system, machine vision system application, used to eliminate the interference light beyond the available band, greatly improve the imaging clarity, as well as the sensitivity of the system.
Longpass Filter

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 <span style="box-sizing: border-box; color: rgb(51, 51, 51); font-family: Arial, "Microsoft YaHei", "\5FAE软雅黑", "\5B8B体", "Malgun Gothic", Meiryo, sans-serif; font-variant-numeric: normal; font-variant-east-asian: normal; line-height: 26px; font-size: 16px;">Longpass filter has the advantages of wide cut-off band, deep cut-off depth, high conversion steepness and high transmittance. It can be widely used in fluorescence excitation spectroscopy measurement, Raman spectroscopy application, spectral grouping application, and astronomical observation application, etc. It can also be widely used in imaging optical system, machine vision system application, used to eliminate the interference light beyond the available band, greatly improve the imaging clarity, as well as the sensitivity of the system.
Bandpass Filter

Filter

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 <span style="color: rgb(46, 48, 51); font-family: Arial, "Microsoft YaHei", 微软雅黑, 宋体, "Malgun Gothic", Meiryo, sans-serif; font-variant-numeric: normal; font-variant-east-asian: normal; line-height: 18px; background-color: rgb(255, 255, 255); font-size: 16px;">The bandpass filter is surrounded by two cutoff bands, which allow only a portion of the spectrum to pass through. It is often used to transmit a portion of the spectrum while cutting off all other wavelengths. Bandpass filters are suitable for a variety of applications, such as spectroscopy, clinical chemistry, or imaging. AOS Optics offers a variety of half-bandwidth bandpass interference filters with a wide range of transmittance and size options.
Steep Long Pass Filter

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<span style="color: rgb(46, 48, 51); font-family: Arial, "Microsoft YaHei", 微软雅黑, 宋体, "Malgun Gothic", Meiryo, sans-serif; font-size: 14px; font-variant-numeric: normal; font-variant-east-asian: normal; line-height: 18px; background-color: rgb(255, 255, 255);"> The Steep Long Pass Filter has the characteristics of high laser damage threshold, deep cut-off depth and steep transition from reflection to transmission. It has been widely used in the fields of microimaging, Raman spectroscopy, biochemical analysis instruments, life science, education and scientific research. We can also customize the filters according to your actual needs.
Dichroic Filter

Filter

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 <span style="color: rgb(46, 48, 51); font-family: Arial, "Microsoft YaHei", 微软雅黑, 宋体, "Malgun Gothic", Meiryo, sans-serif; font-variant-numeric: normal; font-variant-east-asian: normal; line-height: 18px; background-color: rgb(255, 255, 255); font-size: 16px;">A dichromatic spectral filter that can be used to transmit wavelengths longer than the initial wavelength or shorter than the cutoff wavelength. It is divided into long wave pass filter and short wave pass filter. Dichroism splitter can be used for fluorescence excitation spectrum analysis, beam separation, and beam combination.
Color Glass Filter

Filter

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 Color glass filter is to add special elements in the melting process of glass, so as to absorb different spectral bands and pass through other spectral bands. Due to the inherent absorption or transmission characteristics of the material, compared with the dielectric coated film filter, the central wavelength of the colored glass filter will not change when the light beam is incident at different incidence angles. AOS Optics provides extremely durable  color glass filter .

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