66-249 35 x 35 mm N-BK7 45 deg Reflective Yellow Dichroic Filter; t=3 mm 400-725nm

This is a 35 x 35 mm N-BK7 45 degree Reflective Yellow Dichroic Filter, catalog number 66-249, available from Edmund Optics. The filter has a thickness of 3 mm and is designed to work within the wavelength range of 400-725 nm.

The filter is a dichroic type, which means it selectively reflects or transmits different wavelengths of light. In this case, it reflects yellow light, making it ideal for applications where yellow light needs to be isolated or enhanced. The 45 degree angle of incidence is another key feature, ensuring optimal performance when the light is incident at this angle.

The filter is made from N-BK7, a high-quality borosilicate glass known for its excellent optical properties. This material ensures high transmittance and low dispersion, making it suitable for a wide range of optical applications.

The filter's coating is a crucial component, enhancing its performance. Both the front and back surfaces of the filter are coated with EDM 66-243, a coating specifically designed for this type of filter. This coating ensures the filter's durability and maintains its performance over time.

The filter's geometry is rectangular, making it compatible with various optical systems. The physical data provided includes a cut-on wavelength of 0 nm and a cut-off wavelength of 520 nm. This means that the filter begins to transmit light at 0 nm and stops transmitting at 520 nm, effectively reflecting all wavelengths between these two points.