65-025 80 mm Dia. Mounted OD 0.9 Absorptive Neutral Density Filter; t=5 mm 400-700nm

The 65-025 is a Neutral Density Filter, a type of optical component designed to reduce the intensity of incident light without altering its color composition. This particular model, sourced from Edmund Optics, boasts an 80 mm diameter and a thickness of 5 mm, making it suitable for a wide range of optical applications.

The filter's Neutral Density properties are achieved through an Absorptive coating, which evenly absorbs light across the entire spectrum. This model is specifically designed for use within the 400-700nm wavelength range, a spectrum that includes visible light. The coating on both the front and back surfaces of the filter is identified as EDM 59-172, a detail that may be useful for those seeking compatibility with specific optical systems or coatings.

The filter's geometry is defined as a Thin Lens, a shape that minimizes optical aberrations and distortions. This, coupled with its substantial diameter, makes the 65-025 a versatile and high-performing option for various optical setups.

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