65-625 12.5 mm Dia. Mounted Traditional Coated Bandpass Interference Filter; t=7.5 mm 450nm

The 65-625 is a 12.5 mm diameter, mounted traditional coated bandpass interference filter, with a thickness of 7.5 mm, specifically designed for a central wavelength (CWL) of 450nm. This filter is sourced from the reputable optical components vendor, Edmund Optics.

The filter is a bandpass type, which means it allows a specific range of wavelengths to pass through while blocking others. In this case, the 65-625 filter is designed to allow light in the 450nm range to pass through, making it ideal for applications that require narrow-band filtering around this wavelength.

The filter's geometry includes a 12.5 mm diameter, providing a reasonable aperture for many optical systems. The thickness of 7.5 mm is also notable, as it can contribute to the overall optical path length and may need to be considered in system design.

The physical data of the filter includes a cut-on wavelength of 445nm and a cut-off wavelength of 455nm. This means that the filter starts transmitting at 445nm and stops at 455nm, effectively creating a narrow band of transmission around the CWL of 450nm.

The filter is coated on both the front and back surfaces with coatings specified as 'edm 65-625'. These coatings are likely designed to enhance the filter's performance, such as increasing transmission in the passband or reducing reflection.

The shape of the filter is described as 'Thin Lens', suggesting that it may have some lens-like properties. However, without further information, it's difficult to speculate on the exact nature of these properties.