The optical filter is a kind of optical element that selectively selects the transmission, reflection, cut-off, and attenuation of spectral wavelength. According to its function, it can be divided into bandpass filter, long-wave pass filter, short wave pass filter, two Color filters, neutral density filters (ND Filter), notch filters, cold mirrors, hot mirrors, color filters, etc. Divided into interference filters and color absorption filters. These filters are widely used in industries and product fields such as spectral analysis, biomedicine, machine vision, fluorescence microscopy, and industrial automation. The band-pass filter selectively allows certain spectral wavelengths to pass through and prevents certain spectral wavelengths from passing through in its spectral range; the neutral density filter (ND Filter) reduces the transmittance of the specified spectral wavelength range, thereby Reduce luminous flux, which is conducive to the protection of sensors/electronic components. It has a wide range of applications in the field of laser optics/optoelectronics; cold/hot mirrors can specifically reflect and transmit light with longer wavelengths in the spectral range and are widely used Applied in the lighting system, it is helpful to remove the heat generated in the lighting system.
Bandpass filter
The transmission band of a band-pass filter is surrounded by two cut-off bands. It only allows part of the wavelength in the spectrum to pass. It is often used to transmit a part of the spectrum while cutting off all other wavelengths. Bandpass filters are suitable for various applications such as spectroscopy, clinical chemistry, or imaging. Huasen Optoelectronics offers a variety of half-bandwidth bandpass interference filters, with a variety of transmittances and sizes for you to choose from.
Long pass filter
The long-wave pass filter allows light whose wavelength is greater than the set wavelength to pass and cuts off the light whose wavelength is less than the set wavelength. The long-wave pass filter provided by Huasen Optoelectronics has the advantages of wide cut-off bandwidth, deep cut-off depth, high conversion steepness, and high transmittance. It can be widely used in fluorescence excitation spectrum measurement, Raman spectroscopy applications, spectral grouping applications, and astronomical observation applications. It can also be widely used in imaging optical systems and machine vision system applications to eliminate interference light outside the available bands. Improve the sharpness of imaging and the sensitivity of the system.
Short Pass Filter
The short-wave pass filter has the advantages of wide cut-off bandwidth, deep cut-off depth, high conversion steepness, and high transmittance. It can be widely used in fluorescence excitation spectrum measurement, Raman spectroscopy applications, spectral grouping applications, and astronomical observation applications. It can also be widely used in imaging optical systems and machine vision system applications to eliminate interference light outside the available bands. Improve the sharpness of imaging and the sensitivity of the system.
Longwave pass dichroic filter
Dichroic filters can be used to transmit wavelengths that are longer than the initial wavelength or shorter than the cut-off wavelength. It is divided into a long-pass filter and a short-pass filter. The dichroic beam splitter can be used for fluorescence excitation spectrum analysis, beam separation, and beam combination. It is widely used in microscopic imaging, Raman spectroscopy, biochemical analysis instruments, life sciences, education, and scientific research, and other related fields. We can also customize the filter to meet your needs according to your actual needs.
UV metal film neutral density filter
Neutral density filters (ND filters) are often used in imaging or laser applications to prevent strong light from damaging the camera sensor or other optical parts. The ND filter absorbs or reflects the part of the light that is not transmitted to uniformly reduce the transmittance in a certain part of the spectrum.
Color glass bandpass filter
Color glass filter refers to the addition of special elements during the glass melting process, which absorbs different spectral bands and transmits other bands. Due to the inherent absorption or transmission characteristics of the material used, in contrast to the dielectric coating filter, the center wavelength of the color glass filter will not change for the incident light beams at different incident angles.
