Application:Fluorescence microscopy, Optical imaging, Military security, Scientific research, Optical instruments and equipment
A specialized optical part called a short pass filter is crafted to let through light under a certain wavelength boundary (including visible light and some near-infrared light) while blocking or weakening longer wavelength infrared light effectively in optical setups for filtering various wavelength bands as, per specific application requirements using principles of light interference and material absorption characteristics. The filter usually includes thin layers with accurately determined refractive indexes and thicknesses each layer interacts with light in a way that causes interference among the different wavelengths present in the light spectrum when it passes through the filter Light frequencies below a certain threshold are allowed to pass through more easily while those above are either bounced back or absorbed The filter takes advantage of the fact that light of various colors behaves differently based on their interaction, with materials this allows the filter to steer specific colors of light along specific routes Moreover the material used in the filter has the ability to selectively absorb wavelengths which enhances its filtering efficiency.
Infrared short wave pass filters bring multiple benefits. They efficiently block long – wavelength infrared light while enabling the passage of shorter – wavelength infrared and visible light. This characteristic is crucial for applications where unwanted long – wave infrared interference needs to be eliminated. In imaging systems, for example, it helps in obtaining clearer images by reducing the noise caused by long – wavelength infrared radiation. Additionally, these filters are often compact and lightweight, making them easy to integrate into different optical devices. Their stable performance across a range of temperatures ensures reliable operation, whether in laboratory instruments or field – deployed sensors.
The important factors of a short-pass filter consist of the spectral band range of light wavelengths it allows to pass through and the cutoff wavelength where it starts blocking light significantly for optimal performance. The transmittance measures how specific wavelengths of light are transmitted through the filter. Infrared short-pass filters have two benefits that set them apart; firstly they can accurately choose wavelengths so that only light below a certain wavelength can pass through while blocking out any infrared light above that wavelength. A feature is crucial for certain tasks; secondly, they offer high transmittance due to being made from top-notch materials which allow for consistent filtering effects, over a wide range of wavelengths ensuring clear and high-quality light output.
Substrate:ZnSe HT area:7400-12500nm Tp:≥90% Blocking:13000-15000nm Tavg:≤1%
| Products | SP 13000 |
| Substrate | ZnSe |
| HT area | 7400-12500nm |
| Tp | ≥90% |
| Blocking（um） | 13000-15000nm |
| Tavg | ≤1% |
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