Yisu photoelectric 905nm band-pass filter 1064nm infrared Laser rangefinder sensor

Filter, also known as interference filter, mainly uses the interference principle of light to obtain the transmission effect of the spectrum. The filter is processed by a vacuum coating machine to

Thin film deposition and evaporation of refractive index onto optical substrates

Up to achieve different optical effects. When multiple wavelengths of mixed light pass through the filter, interference effects occur due to different refractive indices, resulting in specific wavelengths

Light has a very high transmittance, while other wavelengths

Light is reflected or absorbed.

The filter products of Yisu Optoelectronics are mainly classified by spectral band, spectral characteristics, film material, application characteristics, and other methods.

Spectral bands: UV filter, visible filter, infrared filter;

Spectral characteristics: bandpass filter, cut-off filter, spectral filter, neutral density filter, reflection filter;

Membrane material: soft film filter, hard film filter;

Hard film filter not only refers to film hardness, but also its laser damage threshold, so it is widely used in laser systems

Filters are mainly used in biochemical analyzers.

Bandpass type: Light passing through the selected wavelength band is cut off by light outside the passband. Its optical indicators mainly include center wavelength (CWL) and half bandwidth (FWHM).

It is divided into narrowband and broadband. For example, narrowband 808

Filter NBP-808. Short wave pass (also known as low wave pass): Light shorter than the selected wavelength passes through and light longer than that wavelength is cut off. For example, infrared cutoff filter

Optical film, IR-650.

Long wave pass (also known as high wave pass): Light longer than the selected wavelength passes through, while light shorter than that wavelength cuts off, such as infrared transmission filters, LP-800.