89-841 57 mm Dia. Mounted IR Machine Vision Imaging Filter; t=1.75 mm 880nm

The 89-841 is a mounted IR machine vision imaging filter developed by Edmund Optics, a leading vendor in the optical industry. This filter, with a catalog number of 89-841, is specifically designed for use in the ultraviolet, visible, and near-infrared regions of the spectrum. It is available for purchase through the vendor's official website, where it is currently in stock.

The filter is of the Bandpass type, which means it allows light to pass within a certain range of wavelengths while blocking other wavelengths. In this case, the 89-841 filter is designed to pass light with a wavelength of 880nm, making it ideal for applications that require precise filtering in this region of the spectrum.

The filter is circular in shape, with a diameter of 57mm and a thickness of 1.75mm. This makes it suitable for use in a variety of optical systems where a compact, circular filter is required. The filter is made from a material identified as "uvfs mal- 1965", although the specific properties of this material are not provided in the item data.

The physical data of the filter includes a cut-on wavelength of 812.5nm and a cut-off wavelength of 947.5nm. This means that the filter begins to transmit light at 812.5nm and stops transmitting light at 947.5nm. The central wavelength (CWL) of the filter is 880nm, which is the wavelength at which the filter's transmission is at its maximum.

The filter is coated on both the front and back surfaces with the coating "edm 89-834". The specific properties and function of this coating are not provided in the item data. However, it is likely that the coating is designed to enhance the filter's performance in some way, such as by reducing reflectance or increasing durability.

The filter has a "Thin Lens" shape, which suggests that it is designed to be used in conjunction with a lens system. This could make it ideal for use in machine vision systems, where precise filtering and imaging are critical.