NE203B 2 in x 2 in Absorptive ND Filter; Optical Density 0.3

The NE203B is a Neutral Density (ND) Filter, measuring 2 in x 2 in, manufactured by Thorlabs. This filter is designed with a rectangular base shape and a thin lens shape, making it suitable for a wide range of optical applications. The filter's primary function is to reduce the intensity of incident light without altering its color composition, thus enabling precise control over the light path.

The NE203B filter boasts an optical density of 0.3, which signifies a 20% transmission of the incident light. This level of attenuation is ideal for managing light intensity in high-powered optical systems without causing significant color shifts or distortions. The filter is constructed from n-BK7 Schott, a high-quality optical glass, ensuring excellent optical performance and durability.

The filter's coating is another notable feature. Both the front and back surfaces are coated with tho ne03a, a specialized coating that enhances the filter's performance by reducing surface reflections and improving transmission. This coating also offers scratch resistance, contributing to the filter's longevity and reliability.

According to the provided data, the NE203B filter has a width of 50.8 mm, a height of 50.8 mm, and a thickness of 2.3 mm. This compact size, coupled with its high-performance features, makes the NE203B an excellent choice for various optical applications. The filter is currently in stock and available for purchase through the vendor's website, as indicated by the 'Valid - in stock' status in the item data.