66-055 25.4 mm Dia. Hoya R-62 Red Longpass Color Glass Filter 620nm

The 66-055 is a 25.4 mm diameter color glass filter, specifically designed for longpass applications with a cut-on wavelength of 620nm. This filter is sourced from the renowned optical vendor, Edmund Optics, and is available for purchase through their website.

The filter is part of the Hoya R-62 series, known for their high-quality optical glass and precise coatings. The R-62 filter is designed to transmit light at wavelengths above 620nm, making it ideal for applications where longer wavelengths need to be isolated or emphasized.

The filter has a circular shape, with a diameter of 25.4mm and a thickness of 2.5mm. This compact size makes it suitable for use in various optical systems, including microscopy, spectroscopy, and imaging applications.

The physical data of the filter indicates a cut-on wavelength of 620nm and a cut-off wavelength of 0nm. This means that the filter starts transmitting light at 620nm and continues to transmit all longer wavelengths.

The filter is coated on both sides with the EDM 66-044 coating. This coating enhances the filter's performance by reducing surface reflections and improving transmission efficiency. The coating also provides protection against environmental factors, ensuring the longevity and durability of the filter.

The filter's geometry is that of a thin lens, which helps to minimize optical aberrations and distortions. This makes the filter ideal for use in high-precision optical systems where image quality is paramount.