87-204 50 mm Dia. Infrared (IR) Neutral Density Filter; OD 1.5 2-14µm

The 87-204 is a Neutral Density Filter with a 50 mm diameter, designed for use in the infrared (IR) spectrum with a wavelength of 588 nm. This filter is sourced from Edmund Optics, a leading vendor in the optical industry, and is available for purchase through their website. The filter's catalog number is 87-204, and it is currently in stock.

This filter is made from Germanium Burnett, a material known for its excellent optical properties in the IR spectrum. It features a thin lens shape, with a thickness of 1 mm, making it ideal for applications where space is a constraint. The filter is coated on both the front and back with EDM 12-014, a coating type that enhances its performance in the IR range.

The Neutral Density Filter is a type of optical filter that reduces the intensity of incoming light, regardless of its wavelength. This filter has an Optical Density (OD) of 1.5, which means it attenuates the light by a factor of 3.16, reducing its intensity to 31.6% of the original. The filter's neutral density property ensures that the light's color balance is not altered during this attenuation process.

The 87-204 filter is designed for use with infrared light in the 2-14 µm range. This makes it suitable for a wide range of applications, including IR photography, thermal imaging, and scientific research. Its 50 mm diameter provides a generous aperture, allowing for the use of a wide range of optical systems.