15-458 25.4 mm Dia. Dielectric Coated Colored Glass Replacement Longpass Filter 630nm

The 15-458 is a 25.4 mm diameter colored glass replacement longpass filter with a cut-on wavelength of 630nm, manufactured by Edmund Optics. This filter is designed for use in optical systems where longpass filtering is required, and it features a dielectric coating on both the front and back surfaces for improved performance.

The filter is made from UVFS Mal-1965 material, a type of colored glass specifically designed for optical applications. It has a thickness of 1.1mm, which is thin enough to minimize optical aberrations while still providing robust protection for the optical system. The filter's geometry is circular, making it suitable for use in a wide range of optical systems.

The 15-458 filter's physical data includes a cut-on wavelength of 630nm, meaning it begins to transmit light at this wavelength and above. The cut-off wavelength is 0nm, indicating that it blocks all wavelengths below 630nm. This makes it ideal for applications where longpass filtering is needed, such as in fluorescence microscopy or astronomy.

The filter's coating is a dielectric coating, which is known for its high transmittance and durability. This coating is applied to both the front and back surfaces of the filter, enhancing its performance and longevity. The coating also helps to reduce surface reflections, improving the overall efficiency of the optical system.

The shape of the 15-458 filter is a thin lens, which is designed to minimize optical aberrations and improve the focus of the optical system. This makes it suitable for use in high-precision optical systems where image quality is critical.