65-149 25 mm Dia. Hard Coated OD 4.0 10nm Bandpass Filter; t=3.5 mm 500nm

The 65-149 is a Bandpass Filter with a diameter of 25 mm, sourced from the reputable optical components vendor, Edmund Optics. This filter is specifically designed for use with a central wavelength of 500nm, making it ideal for applications that require precise wavelength selection.

The filter boasts a hard coating on both the front and back surfaces, indicated by the coating ID 'edm 65-088'. This hard coating enhances the filter's durability, making it resistant to scratches and other forms of wear and tear. The filter's thickness is 3.5 mm, providing sufficient structural integrity for most applications.

The 65-149 filter's bandpass properties are defined by its cut-on wavelength of 495nm and cut-off wavelength of 505nm. These parameters, combined with the central wavelength, allow for a 10nm bandpass, ensuring excellent wavelength discrimination. The cut-on and cut-off wavelengths are critical in determining the filter's passband, which is the range of wavelengths that the filter allows to pass through.

The filter's geometry is that of a thin lens, which is a type of lens with a thickness that is much smaller than its diameter. This geometry is beneficial in applications where space is a constraint.

In terms of availability, the 65-149 filter is currently in stock, according to the vendor's website. Interested users can access more detailed information and purchase the filter via the provided weblink.