A nozzle having a housing and an assembly including at least two conjugated parts separated by a spacer seal. Behind the front panel a predetermined distance can be a reflective panel or other surface. Comparing the source reaching definition set and the reflected optimized reaching definition set and determining a status of a variable. As needed, the device is presented to the system for authentication, enabling a person access to a secure area. If the cumulative bandwidth balance deviates from a predetermined range, quantization is adjusted as needed to either improve image quality to more completely consume available bandwidth or to reduce image quality to thereby consume less bandwidth.