Patent ID: 11921284
Assignee: RAYTHEON COMPANY
Field: Optics (Instruments)
Classification: CPC G | IPC G

Claim 0:
1. A zoom system, comprising:
a collection optic having a first focal length f1, said collection optic configured to collect a beam of light; and
a reflective Fresnel Lens having a second variable focal length f2 configured to alter a width of the beam of light,
said reflective Fresnel Lens comprising a Micro-Electro-Mechanical System (MEMS) Micro-Mirror Array (MMA) including a plurality of mirrors, said MFMS MMA responsive to command signals to tip, tilt and piston the mirrors in three degree-of-freedom (DOF) to form a center region surrounded by a plurality of concentric rings whose reflective surfaces as formed by the mirrors approximate respective curvatures to focus light at a common focal point to set the second variable focal length f2.