34-301 12.5 mm Dia. High Performance OD 4.0 Longpass Filter; t=1.5 mm 375nm

The 34-301 is a high-performance longpass filter, boasting a 12.5 mm diameter and a thickness of 1.5 mm. This filter, sourced from the reputable vendor Edmund Optics, is designed to transmit light with wavelengths longer than 375 nm, making it ideal for applications that require the blocking of ultraviolet light.

The filter's longpass characteristic is achieved through a precise cut-on wavelength of 375 nm, ensuring efficient blocking of shorter wavelengths. The cut-off wavelength, on the other hand, is 0 nm, indicating that no light below the cut-on wavelength is transmitted.

The 34-301 filter features a circular base shape and is coated on both the front and back with the EDM 34-301 coating. This coating enhances the filter's performance and durability, making it suitable for a wide range of applications.

The filter's geometry, including its diameter and thickness, is designed to ensure optimal performance and ease of integration into various optical systems. The 12.5 mm diameter provides a generous aperture, while the 1.5 mm thickness offers robustness without compromising on light transmission.

This filter is categorized as a thin lens, indicating its ability to focus light. This property can be beneficial in certain applications, providing an additional level of functionality beyond simple wavelength filtering.