Mr. Ellis I. Betensky Profile

Ellis I. Betensky

Retired

SPIE Involvement:

Author | Editor | Instructor

Proceedings Article | 9 September 2019 Presentation + Paper

Designing astigmatism-corrected zoom lenses for digital consumer imaging

Richard Youngworth, Ellis Betensky

Proceedings Volume 11106, 111060A (2019) https://doi.org/10.1117/12.2528473

KEYWORDS: Monochromatic aberrations, Zoom lenses, Lens design, Digital imaging, Modulation transfer functions, Image sensors, Aberration correction, Aspheric lenses, Patents, Image quality

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Proceedings Article | 3 September 2015 Paper

Understanding how entrance and exit pupils have determined the evolution of the modern zoom lens design (tutorial)

Ellis Betensky

Proceedings Volume 9580, 958004 (2015) https://doi.org/10.1117/12.2190098

KEYWORDS: Zoom lenses, Lens design, Optical design, Control systems, Image compression, Monochromatic aberrations, Chromatic aberrations, Chemical elements, Content addressable memory, Automatic exposure

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Proceedings Article | 19 October 2012 Paper

Fundamental considerations for zoom lens design (tutorial)

Richard Youngworth, Ellis Betensky

Proceedings Volume 8488, 848806 (2012) https://doi.org/10.1117/12.930618

KEYWORDS: Zoom lenses, Lens design, Patents, Radon, Optical design, Sensors, Geometrical optics, Cameras, Manufacturing, Computing systems

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Proceedings Article | 19 October 2012 Paper

The AWMC metric for zoom lens assessment

Richard Youngworth, Ellis Betensky, William Plummer

Proceedings Volume 8488, 848807 (2012) https://doi.org/10.1117/12.930616

KEYWORDS: Zoom lenses, Modulation transfer functions, Lens design, Modulation, Spatial frequencies, Image quality, Aspheric lenses, Imaging systems, Optical transfer functions, Fourier transforms

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Proceedings Article | 27 September 2008 Paper

Lens design with Forbes aspheres

Richard Youngworth, Ellis Betensky

Proceedings Volume 7100, 71000W (2008) https://doi.org/10.1117/12.797929

KEYWORDS: Aspheric lenses, Lens design, Manufacturing, Optics manufacturing, Optical spheres, Metrology, Optical design, CRTs, Telescopes, Surface finishing

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Proceedings Article | 3 August 2006 Paper

The past, present, and future of optical design

Warren Smith, Ellis Betensky, David Williamson, Juan Miñano, R. John Koshel

Proceedings Volume 6342, 63422Y (2006) https://doi.org/10.1117/12.696972

KEYWORDS: Lens design, Zoom lenses, Chemical elements, Optical design, Monochromatic aberrations, Computing systems, Wavefronts, Glasses, Cameras, Lithography

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Proceedings Article | 24 August 2005 Paper

Forty years of modern zoom lens design

Ellis Betensky

Proceedings Volume 5865, 586506 (2005) https://doi.org/10.1117/12.624553

KEYWORDS: Zoom lenses, Lens design, Cameras, Objectives, Computing systems, Manufacturing, Video, Aberration correction, Control systems, Distortion

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Proceedings Article | 14 December 2001 Paper

Telecentric zoom lens used in metrology applications

Stephanie Bloch, Ellis Betensky

Proceedings Volume 4487, (2001) https://doi.org/10.1117/12.450419

KEYWORDS: Zoom lenses, Objectives, Distortion, Iris, Metrology, Lens design, Aspheric lenses, Manufacturing, Reflection, Fiber optic illuminators

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Proceedings Article | 21 September 1998 Paper

High-performance wide-angle macrofocus zoom lens for 35-mm cinematography

Iain Neil, Ellis Betensky

Proceedings Volume 3482, (1998) https://doi.org/10.1117/12.322006

KEYWORDS: Zoom lenses, Monochromatic aberrations, Spherical lenses, Distortion, Iris, Optical design, Cameras, Optical components, Aspheric lenses, Lens design

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Proceedings Article | 21 September 1998 Paper

Compact wide-range telecentric zoom lens for DMD projectors

J. Caldwell, Ellis Betensky

Proceedings Volume 3482, (1998) https://doi.org/10.1117/12.322007

KEYWORDS: Zoom lenses, Distortion, Digital micromirror devices, Monochromatic aberrations, Projection systems, Chemical elements, Glasses, Lenses, Image quality, Modulation transfer functions

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Proceedings Article | 21 September 1998 Paper

Aberration correction and desensitization of an inverse-triplet object lens

Ellis Betensky

Proceedings Volume 3482, (1998) https://doi.org/10.1117/12.322011

KEYWORDS: Lens design, Monochromatic aberrations, Manufacturing, Aberration correction, Modulation transfer functions, Aspheric lenses, Objectives, Tolerancing, Distortion, Glasses

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Proceedings Article | 25 September 1997 Paper

Zoom relay lens for a family of catadioptric objective lenses

Ellis Betensky

Proceedings Volume 3129, (1997) https://doi.org/10.1117/12.284241

KEYWORDS: Zoom lenses, Objectives, Relays, Combined lens-mirror systems, Mirrors, Dysprosium, Space mirrors, Manufacturing, Control systems, Image sensors

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Proceedings Article | 5 October 1995 Paper

Zoom lenses for small CCD cameras

Ellis Betensky

Proceedings Volume 2539, (1995) https://doi.org/10.1117/12.222822

KEYWORDS: Zoom lenses, Charge-coupled devices, Lens design, Imaging systems, Chromatic aberrations, Glasses, Distortion, Modulation transfer functions, Monochromatic aberrations, CCD cameras

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SPIE Journal Paper | 1 August 1993

Postmodern lens design

Ellis Betensky

OE, Vol. 32, Issue 08, (August 1993) https://doi.org/10.1117/12.10.1117/12.145079

KEYWORDS: Lens design, Chemical elements, Genetic algorithms, Gaussian optics, Zoom lenses, Optical design, Modulation transfer functions, Glasses, Aspheric lenses, Optimization (mathematics)

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Proceedings Article | 1 July 1992 Paper

Zoom lens principles and types

Ellis Betensky

Proceedings Volume 10263, 1026307 (1992) https://doi.org/10.1117/12.131970

KEYWORDS: Zoom lenses, Lenses, Aspheric lenses, Gaussian optics

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Proceedings Article | 1 January 1991 Paper

Invited paper: Role of aspherics in zoom lens design

Ellis Betensky

Proceedings Volume 1354, (1991) https://doi.org/10.1117/12.47875

KEYWORDS: Zoom lenses, Aspheric lenses, Lens design, Monochromatic aberrations, Video, Cameras, Lenses, Aberration correction, Oxygen, Chemical elements

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Showing 5 of 16 publications

SPIE Conference Volume | 18 September 2015

Zoom Lenses V

SPIE Conference Volume | 8 October 2012

Zoom Lenses IV

SPIE Conference Volume | 25 September 1997

Zoom Lenses II

Conference Committee Involvement (4)

Zoom Lenses V

11 August 2015 | San Diego, California, United States

Zoom Lenses IV

12 August 2012 | San Diego, California, United States

Zoom Lenses III

31 July 2001 | San Diego, CA, United States

Zoom Lenses II

28 July 1997 | San Diego, CA, United States

Course Instructor

SC381: Introduction to Zoom Lens Design

This course provides attendees with a basic understanding of how various types of zoom lenses function, and particularly the limitations of their optical designs. The emphasis of the course is an understanding of how: the magnification is changed; the image position is stabilized; aberrations result; aberrations are corrected. Existing designs are examined to illustrate the concepts involved. This course shows you how optical design programs work with zoom lenses.

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