Device and method of measuring absorbed energy-momentum symmetry

A method for measuring absorbed energy-momentum symmetry, comprising:

• splitting a single source of high intensity radiant energy into a first beam of energy and a second beam of energy, each beam being filtered to a desired monochromatic wave-length;
• conducting a first measurement of radiant energy of both beams at a first measuring point, said measurement being performed in units of watts per steradian per square meter per nanometer (W·sr−1·m−1·nm−1);
• providing an equal-arm force comparator device capable of engaging said two beams of energy, and rotating about a point, said comparator device including two targets to engage said two beams of energy such that said first beam impinges against a first target and said second beam impinges against a second target, said first and second beams having a known wavelength and radiant energy, and further said beams impinging against said targets at the same angle of incidence at the same moment and direction in time;
• conducting a second measurement of any resultant angular velocity of said targets included on said comparator device at a second measuring point to provide a measurement of the radiant energy's impinging momentum;
• determining an electrical output of the measured angular velocity as conducted as the second measuring point;
• providing a programmable logic controller including an input device;
• inputting an electrical output into said programmable logic controller, said input corresponding to the measured angular velocity as determined at the second measuring point and yielding a radiant momentum (p) value in the units of kg·m·s−1;
• and
• determining a ratio of said first measurement of radiant energy relative said second measurement of the radiant energy's impinging momentum, to thereby yield a measurement of absorbed energy-momentum symmetry.

A comparator for measuring absorbed energy-momentum symmetry, comprising

• a high intensity energy source capable of emitting a beam of radiant energy;
• a pair or radiant energy targets attached to opposing arms of a balanced horizontal arm that is able to rotate in a substantially frictionless manner about a point;
• a device for splitting said beam of radiant energy such that a first split portion of said beam impinges against the first radiant energy target of said pair of targets, and a second split portion of said beam impinges against the second radiant energy target of said pair of targets;
• and
• a measurement device for measuring the momentum caused by one or both of said split portions of said radiant energy beam impinging said pair of targets,
• whereby the comparator measures radiant energy in units of W·sr−1·m−2·Hz−1.