65-695 25 mm Dia. Mounted Traditional Coated Bandpass Interference Filter; t=7.5 mm 505nm

The 65-695 is a Bandpass Filter with a circular base shape and a 25 mm mounted diameter, sourced from Edmund Optics. This filter is designed to transmit light within a specific range of wavelengths while blocking other wavelengths, making it ideal for applications requiring wavelength selectivity.

The filter's primary wavelength is 505nm, with a Full Width at Half Maximum (FWHM) of 10nm. The FWHM is a measure of the filter's bandwidth, indicating the range of wavelengths it can transmit around the central wavelength. This filter's FWHM suggests a narrow bandwidth, providing high selectivity and precision.

The filter's geometry includes a diameter of 25mm and a thickness of 7.5mm. The thickness is crucial in applications where the filter's placement affects the optical path. The filter's material ID is UVFS MAL-1965, although the specific material properties are not provided in the item data.

The physical data of the filter indicates a cut-on wavelength of 500nm and a cut-off wavelength of 510nm. The cut-on and cut-off wavelengths define the range of wavelengths the filter begins and stops transmitting, respectively. This range is slightly broader than the FWHM, providing a broader but less selective transmission range.

The filter features the same coating on both the front and back surfaces, specifically EDM 65-635. The type of coating is not specified, but it could be an anti-reflective coating to minimize surface reflections or a protective coating to enhance durability.

The filter's shape is described as a Thin Lens, suggesting it may have some lens-like properties. However, the specific lens parameters are not provided in the item data.