Bandpass filter narrowband filter
Advantages of narrowband filter products: Single piece narrowband filter coated with hard film, long service life, wavelength positioning ion evaporation, small temperature drift, strict production process control, small product size and optical index errors, imported ultra-thin optical glass, high transmittance, good smoothness, small thickness tolerance, good flatness and other optical characteristics. Adopting imported coating equipment ion sputtering coating process, it has the characteristics of high film firmness, good spectral uniformity, and strong center wave stability.
Narrowband filter is a small category separated from bandpass filter, which is actually a type of bandpass narrow light plate. Bandpass filter is considered a large category, and its definition is the same as bandpass filter. Narrowband filter allows light to pass through a specific band, while light signals on both sides outside of this band cannot pass through. The passband of narrowband filter is generally relatively narrow, usually 5% or less of the center wavelength value.
The main function of narrowband filters is to allow light of a specific wavelength to pass through, and to reflect or attenuate light of other wavelengths. The half wave width is usually controlled at 20nm or less, and can be in the ultraviolet, visible, near-infrared, and far-infrared bands.
The single-chip narrowband filter does not use adhesive coating, but uses wavelength positioning ion evaporation, which has low temperature drift, high penetration rate, and high cut-off depth.
Application areas: ELISA reader, fluorescence analyzer, cable TV upgrade equipment, infrared electronic whiteboard, medical and health equipment and detection instruments, transmission equipment, barcode scanning, infrared touch screen, infrared SHE imaging head, iris recognition, infrared medical instruments, infrared ink recognition, red film recognition, facial recognition sensor system, handheld infrared laser rangefinder, laser rangefinder, optical instruments.
Both of them cause the image to be colored and seriously affect the imaging quality, even in the near axis region. We define the wavelength of this diffraction direction, which is the wavelength of the reflected light from the groove surface in the direction of diffraction on the grating, as the shining wavelength. This feature can be used to adjust the center wavelength within a certain range. The emergence and application of electronic computers have greatly promoted optical design work. The monitoring distance is far: up to 1500-5000 meters. The object distance for determining the target can be divided into monochrome thermometers and two-color thermometers (radiation colorimetric thermometers) according to the principle.
Narrowband filter is a small category separated from bandpass filter, which is actually a type of bandpass narrow light plate. Bandpass filter is considered a large category, and its definition is the same as bandpass filter. Narrowband filter allows light to pass through a specific band, while light signals on both sides outside of this band cannot pass through. The passband of narrowband filter is generally relatively narrow, usually 5% or less of the center wavelength value.
The main function of narrowband filters is to allow light of a specific wavelength to pass through, and to reflect or attenuate light of other wavelengths. The half wave width is usually controlled at 20nm or less, and can be in the ultraviolet, visible, near-infrared, and far-infrared bands.
The single-chip narrowband filter does not use adhesive coating, but uses wavelength positioning ion evaporation, which has low temperature drift, high penetration rate, and high cut-off depth.
Application areas: ELISA reader, fluorescence analyzer, cable TV upgrade equipment, infrared electronic whiteboard, medical and health equipment and detection instruments, transmission equipment, barcode scanning, infrared touch screen, infrared SHE imaging head, iris recognition, infrared medical instruments, infrared ink recognition, red film recognition, facial recognition sensor system, handheld infrared laser rangefinder, laser rangefinder, optical instruments.
Both of them cause the image to be colored and seriously affect the imaging quality, even in the near axis region. We define the wavelength of this diffraction direction, which is the wavelength of the reflected light from the groove surface in the direction of diffraction on the grating, as the shining wavelength. This feature can be used to adjust the center wavelength within a certain range. The emergence and application of electronic computers have greatly promoted optical design work. The monitoring distance is far: up to 1500-5000 meters. The object distance for determining the target can be divided into monochrome thermometers and two-color thermometers (radiation colorimetric thermometers) according to the principle.