68-657 50 mm Dia. Traditional Coated Infrared (IR) Longpass Filter; t=1mm 1050nm

The 68-657 is a 50 mm diameter Infrared (IR) Longpass Filter, manufactured by Edmund Optics. This filter is designed with a circular base shape and a thin lens shape, making it suitable for a wide range of optical applications. The filter features a traditional coating on both the front and back surfaces, enhancing its performance and durability.

The filter's primary function is to allow the transmission of longer wavelengths while blocking shorter wavelengths. The cut-on wavelength is specified at 1050 nm, indicating that it begins to transmit light at this wavelength and beyond. The cut-off wavelength, on the other hand, is 0 nm, meaning it blocks all wavelengths shorter than 1050 nm. This makes the 68-657 an ideal choice for applications that require the use of infrared light.

The filter's geometry includes a diameter of 50 mm and a thickness of 1 mm. This thickness ensures the filter's durability while minimizing its impact on the overall optical system. The material ID for this filter is silicon sal vil 1957, although specific details about this material are not provided in the item data.

The filter is currently in stock and available for purchase through the Edmund Optics website. The provided weblink leads directly to the product page, where users can find more information, place an order, or check the product's availability.