This is a 50 mm diameter Neutral Density Filter, model number 62-662, sourced from the renowned optical components vendor, Edmund Optics. The filter is designed to provide a consistent attenuation of light across the UV-VIS spectrum, specifically within the wavelength range of 250-700nm.
The filter features a Metallic Based coating, denoted as 'uvfs mal- 1965', on both the front and back surfaces. This coating is identified as 'edm 48-618', which is a proprietary coating developed by Edmund Optics. The coating is designed to maintain neutrality across the UV-VIS spectrum, ensuring that the attenuation does not introduce any color casts or biases.
The filter has a thickness of 5mm, which is relatively thin considering its diameter. This thinness is achieved through the use of a Thin Lens shape, which helps to minimize optical aberrations and distortions. The filter's geometry, including its diameter and thickness, is designed to be compatible with a wide range of optical systems and components.
The filter's Neutral Density value is OD 0.3, which corresponds to a transmission of approximately 50%. This makes it suitable for applications where moderate light attenuation is required, such as in photography, beam alignment, or laser applications.
The filter is currently in stock and available for purchase through the Edmund Optics website, as indicated by the 'weblink status' field. For more detailed information, including technical specifications and performance data, please refer to the product's webpage.