13-226 12.5 mm Dia. Hoya ND-13 Absorptive Neutral Density Filter; OD 0.9 750-1550nm

The 13-226 is a Neutral Density Filter by Hoya, available from Edmund Optics. This absorptive filter boasts a 12.5 mm diameter and a thickness of 2.5 mm, making it a compact yet robust solution for various optical applications.

The filter's primary function is to reduce the intensity of light entering the optical system without altering its color composition. This is achieved through the use of a specialized coating, denoted as 'edm 13-226' on both the front and back surfaces. This coating provides a Neutral Density of 0.9 (ND-13), which corresponds to a 40% transmission of light.

The 13-226 filter is designed for use within the near-infrared spectrum, specifically between 750nm and 1550nm. This makes it an ideal choice for applications such as laser systems, astronomical observations, or any setup where precise control of light intensity is required within this wavelength range.

The filter is shaped as a Thin Lens, a design that minimizes optical aberrations and ensures high-quality imaging. This, combined with its robust construction and reliable performance, makes the 13-226 an excellent choice for a wide range of optical applications.

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