Design And Implementation Of A Zoom System Using Active Lenses

Mohammad Arammash

Mentor: Dr. Kamal Youcef-Toumi; Massachusetts Institute of Technology

Abstract

A zoom lens is an optical system that can vary the focal length while keeping the image plane stationary. In order to optically vary the magnification of an imaging system, continuous mechanical zoom lenses require multiple optical elements and use fine mechanical motion to precisely adjust the separations between individual or groups of lenses. By incorporating active elements into the optical design, one can eliminate the need to change the spacing between lenses and create an imaging system with variable optical magnification that has no translational moving parts. Changing the effective focal length can be accomplished by positioning two or more active optics in the optical design and adjusting the power of the lens accordingly. The active optics used and designed in this application are variable focal length lenses. Active optics technology is essential for improving the capabilities of imaging systems while reducing size, weight, and increasing speed. The structure and principle of the lens system are introduced. Detailed calculations and simulation examples are presented to show that this zoom lens system appears viable as the next-generation zoom lens. By using multiple active optics a system that can achieve a 2.2x zoom with no translational moving parts was designed. Through the creation of active optical elements the range of focal length and aperture diameter can be controlled to achieve a desired higher zoom and depth of focus. /

 
Apr 16th, 11:15 AM

Design And Implementation Of A Zoom System Using Active Lenses

Owens 104

A zoom lens is an optical system that can vary the focal length while keeping the image plane stationary. In order to optically vary the magnification of an imaging system, continuous mechanical zoom lenses require multiple optical elements and use fine mechanical motion to precisely adjust the separations between individual or groups of lenses. By incorporating active elements into the optical design, one can eliminate the need to change the spacing between lenses and create an imaging system with variable optical magnification that has no translational moving parts. Changing the effective focal length can be accomplished by positioning two or more active optics in the optical design and adjusting the power of the lens accordingly. The active optics used and designed in this application are variable focal length lenses. Active optics technology is essential for improving the capabilities of imaging systems while reducing size, weight, and increasing speed. The structure and principle of the lens system are introduced. Detailed calculations and simulation examples are presented to show that this zoom lens system appears viable as the next-generation zoom lens. By using multiple active optics a system that can achieve a 2.2x zoom with no translational moving parts was designed. Through the creation of active optical elements the range of focal length and aperture diameter can be controlled to achieve a desired higher zoom and depth of focus. /