Four Element Opto-Mechanical Compensation Varifocal (Zoom) Systems

E. K. Murthy; P. K. Goel; V. V. Rao

doi:10.1117/12.949285

14 February 1986 Four Element Opto-Mechanical Compensation Varifocal (Zoom) Systems

E. K. Murthy, P. K. Goel, V. V. Rao

Proceedings Volume 0554, 1985 International Lens Design Conference; (1986) https://doi.org/10.1117/12.949285
Event: 1985 International Lens Design Conference, 1985, Cherry Hill, United States

Abstract

An attempt has been made to modify Bergstein's iteration design procedure for the four element optcal-compensation varifocal system. Here all available degrees of freedom are made use of, to satisfy the desired conditions in practical systems under consideration. It has been concluded that most of the procedures claimed after Bergstein, can be derived as special cases of the proposed procedure. A minor mechanical movement to the central stationery element of the zoom unit has been proposed to reduce the magnitude of image oscillations further, resulting in opto-mechanical compensation system, and this minor movement also has been envisaged to provide explanation for the different possible profiles of the movement followed in other solutions of four element opto-mechanical compensation zoom systems.

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E. K. Murthy, P. K. Goel, and V. V. Rao "Four Element Opto-Mechanical Compensation Varifocal (Zoom) Systems", Proc. SPIE 0554, 1985 International Lens Design Conference, (14 February 1986); https://doi.org/10.1117/12.949285

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KEYWORDS

Zoom lenses

Lens design

Chemical elements

Optical components

Control systems

Computing systems

Fourier transforms

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