Bidimensional Lens Systems : A Rational Approach To Group Displacements During Focusing And/Or Zooming

Jacques P. L. Angenieux

doi:10.1117/12.940223

10 June 1987 Bidimensional Lens Systems : A Rational Approach To Group Displacements During Focusing And/Or Zooming

Jacques P. L. Angenieux

Proceedings Volume 0766, Recent Trends in Optical Systems Design and Computer Lens Design Workshop; (1987) https://doi.org/10.1117/12.940223
Event: OE LASE'87 and EO Imaging Symposium, 1987, Los Angeles, CA, United States

Abstract

Modern objective lenses for cinematography, television or photography, and particularly zoom lenses, are composed of several groups of lenses which are axially displaced during zooming and/or focusing. The number of these groups has increased recently as well as the complexity of their relative movements and functions. In this paper, we give a short history of zooming and focusing techniques ; we discuss the inconvenience of traditional solutions. We then introduce the concept of bidimensional law. We propose a systematic classification of possible lens-types according to the 4 possible types of group. We finally present a few types of lenses in the form of truth tables and parametered diagrams explaining which groups move and how during focusing and/or zooming.

Citation Download Citation

Jacques P. L. Angenieux "Bidimensional Lens Systems : A Rational Approach To Group Displacements During Focusing And/Or Zooming", Proc. SPIE 0766, Recent Trends in Optical Systems Design and Computer Lens Design Workshop, (10 June 1987); https://doi.org/10.1117/12.940223

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KEYWORDS

Zoom lenses

Cameras

Optical design

Computing systems

Lens design

Content addressable memory

Photography

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