11-985 25 mm Dia. First Surface UV Bandpass Filter; t=1.5 mm 228nm

The 11-985 is a 25 mm diameter First Surface UV Bandpass Filter with a thickness of 1.5 mm, specifically designed for use with a central wavelength of 228nm. This filter, offered by Edmund Optics, is a Bandpass Filter, which allows light to pass through a specific range of wavelengths while blocking other wavelengths.

The filter's physical data includes a cut-on wavelength of 223nm and a cut-off wavelength of 233nm, ensuring a tight bandpass performance. The front and back of the filter are coated with "edm 11-985", a proprietary coating developed by Edmund Optics, which enhances its optical properties and durability.

The filter's geometry is defined by a 25mm diameter, providing a large aperture for high light throughput. The thickness of 1.5mm is sufficient to maintain the filter's structural integrity while minimizing optical distortions. The filter's base shape is circular, a common shape for optical components due to its symmetry and ease of use in various optical systems.

The filter is made from UVFS Mal-1965, a material specifically designed for UV applications. This material ensures high transmittance in the UV range and low absorption, making it ideal for UV Bandpass Filters.

The filter is shaped as a Thin Lens, which means it has been designed to minimize optical aberrations and distortions. This feature makes it suitable for use in high-precision optical systems where image quality is critical.

The filter's catalog number is 11-985, and it is available for purchase from the Edmund Optics website. The link provided in the item data indicates that the filter is currently in stock, ensuring quick delivery times.