65-719 25 mm Dia. Mounted Traditional Coated Bandpass Interference Filter; t=7.5 mm 690nm

The 65-719 is a 25 mm diameter mounted bandpass interference filter, with a thickness of 7.5 mm, designed for use at a central wavelength of 690nm. This filter is sourced from Edmund Optics, a leading vendor in the optical industry, and is available for purchase through their website.

The filter is designed with a base shape of a circle, and it features a traditional coating on both the front and back surfaces. This coating is identified as EDM 65-659, a specific coating type known for its performance in optical applications. The filter's geometry includes a diameter of 25 mm and a thickness of 7.5 mm, making it suitable for a wide range of optical systems.

The 65-719 filter is a bandpass filter, which means it allows light within a specific range of wavelengths to pass through while blocking out other wavelengths. In this case, the filter is designed to pass light between 685nm and 695nm, as indicated by its cut-on and cut-off wavelengths. The central wavelength (CWL) of the filter is 690nm, indicating the wavelength at which the filter's transmission is at its maximum.

This filter is mounted, which means it is ready for immediate use in optical systems. The mounting process involves securing the filter in a frame or holder, which can simplify the integration process in optical systems. The shape of the filter is thin lens, which suggests that it is designed to minimize optical aberrations and distortions, thereby improving the overall performance of the optical system.