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Applied Optics

Applied Optics


  • Vol. 43, Iss. 30 — Oct. 20, 2004
  • pp: 5618–5630

Achromatic hybrid refractive-diffractive lens with extended depth of focus

Angel Flores, Michael R. Wang, and Jame J. Yang  »View Author Affiliations

Applied Optics, Vol. 43, Issue 30, pp. 5618-5630 (2004)

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A method for designing achromatic hybrid refractive-diffractive elements that can produce beams with long focal depths while they preserve the entire aperture for capture of light and high transverse resolution is presented. Its working principle is based on the combination of a diffractive optical element that generates a long range of pseudonondiffractive rays and a refractive lens of opposite dispersion to form an achromatic hybrid lens. A hybrid lens with a fast f-number (f/1) that works in the entire visible wave band (400–700 nm) was designed and fabricated. Simulation results demonstrate a factor-of-10 improvement in depth of focus compared with that of a conventional f/1 lens, with matching 1-μm lateral resolution. Experimental results confirm the effectiveness of the proposed method through demonstration of an achromatic hybrid lens with better than a factor-of-7 improvement in depth of focus and 1-μm transverse resolution.

© 2004 Optical Society of America

OCIS Codes
(050.1970) Diffraction and gratings : Diffractive optics
(220.1000) Optical design and fabrication : Aberration compensation
(220.3620) Optical design and fabrication : Lens system design

Original Manuscript: April 28, 2004
Revised Manuscript: July 14, 2004
Published: October 20, 2004

Angel Flores, Michael R. Wang, and Jame J. Yang, "Achromatic hybrid refractive-diffractive lens with extended depth of focus," Appl. Opt. 43, 5618-5630 (2004)

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