The earliest form was used by a member of the Raiders and later adopted by Iron Man. These emitted photons into a small round shape and were generally a supplement to the rest of their armor’s defenses.^[1]

U.S.Agent received a photon shield when he joined Force Works; it could be activated by voice command.^[2] Around this time S.H.I.E.L.D. produced its own design using cooled plasma. Captain America briefly used the plasma shield while in exile. Not only were they useful protection, but the shields could be used as controllable projectile weapons.^[3]

On Counter-Earth, Rebecca Barnes used a Vibranium-powered triangular energy shield.^{[citation needed]}.