Automatic closed loop scaling and drift correcting system and method particularly for aircraft head up displays

摘要: A display system and method, especially for use in an aircraft head up system, maintaining optical image a predetermined position on light emitting screen. The has beam type generator controlled by operating circuit. scans both central region marginal regions of the have sensors is sequence plural coordinate commands accordance with search pattern restricted to vicinity sensors. Signals resulting therefrom are utilized eliminate deflection errors.