Longpass filters are a type of optical filter used to remove the shorter wavelengths and pass the longer ones. Longpass filters are commonly used in photography, cinematography, and scientific instruments to attain greater optical resolution by allowing the light to pass through.
Safety from Unwanted Wavelengths
Long-pass filters are helpful in industrial settings where they can be utilized to filter out unwanted wavelengths such as infrared, ultraviolet or gamma radiation. They can be used as a safety precaution to help protect people from exposure to harmful UV rays, heat, or toxins.
Used with Solar Panels
Solar panels can only absorb a certain amount of solar energy and are still not able to produce enough wattage. When the cost of photovoltaic cells outweighs the benefits, long-pass filters are needed to maximize the amount of sunlight absorbed into the solar panel.
Improve Lighting
Long pass filters are made of glass materials with a long-pass filter spectral transmission curve with a small cut-off wavelength at 450nm. They can be used to filter intense light and eliminate radiation such as UV, infrared, or blue light. Benefits of using this type of optical filter include protecting eyesight from UV radiation and improving lighting in some applications.
Clearer Photos
Long pass optical filters are a type of lens filter designed for closer focusing with maximum sharpness. They can produce images with a greater depth-of-field than an ordinary lens by removing short-wavelength light from the light reaching the sensor. They are used in photography to remove unwanted reflections and reduce luminance noise. They enhance color accuracy and reduce noise in photographs.
