Optical processor arrays for controlling focal length or for tuning the depth of field


  • Jorge Ojeda Castaneda University of Guanajuato, Mexico
  • C. M. Gómez-Sarabia University of Guanajuato, Mexico




We present two families of optical processor arrays. One family uses a pair of complex conjugate phase arrays for implementing a varifocal lenslet array, which is useful for axial scanning. The other family uses a different pair of complex conjugate phase arrays for controlling the depth of field in a telecentric processor array.

Full text: PDF

  1. L. W. Alvarez U.S. Patent 3,305,294 (3rd Dec. 1964).
  2. A. W. Lohmann, Italian Patent 727,848 (19th June, 1964).
  3. A.W. Lohmann, "A New Class of Varifocal Lenses", Appl. Opt. 9, 1669 (1970). [CrossRef]
  4. I. A. Palusinski, J. M. Sasián, and J. E. Greivenkamp, "Lateral-Shift Variable Aberration Generators", Appl. Opt. 38, 86 (1999). [CrossRef]
  5. N. López-Gil, H. C. Howland, B. Howland, N. Charman, and R. Applegate, "Generation of third-order spherical and coma aberrations by use of radially symmetrical fourth-order lenses", J. Opt. Soc. Am. A 15, 2563 (1998). [CrossRef]
  6. E. R. Dowski, Jr., and T. W. Cathey, "Extended depth of field through wave-front coding.", Appl. Opt. 34, 1859 (1995). [CrossRef]
  7. J. Ojeda-Castaneda, J. E. A. Landgrave and C. M. Gómez-Sarabia, "Conjugate phase plate use in analysis of the frequency response of imaging systems designed for extended depth of field", Appl. Opt. 47, (2008). [CrossRef]
  8. J. M. Burch and D. C. Williams, "Varifocal moiré zone plates for straightness measurement", Appl. Opt. 16, 2445 (1977). [CrossRef]
  9. A.W. Lohmann and D.P. Paris, "Variable Fresnel Zone Pattern", Appl. Opt. 6, 1567 (1967). [CrossRef]
  10. E. Acosta and S. Bará, "Variable aberration generators using rotated Zernike plates", J. Opt. Soc. Am. A, 22, 1993 (2005). [CrossRef]
  11. S. Bernet and M. Ritsch-Marte, , "Adjustable refractive power from diffractive moiré elements", Appl. Opt. 47, 3722 (2008). [CrossRef]
  12. S. Bará, Z. Jaroszewicz, A. Kołodziejczyk, and V. Moreno, "Determination of basic grids for subtractive moire patterns", Appl. Opt. 30, 1258 (1991). [CrossRef]

Author Biography

Jorge Ojeda Castaneda, University of Guanajuato, Mexico

Electronics Department, Professor




How to Cite

J. Ojeda Castaneda and C. M. Gómez-Sarabia, “Optical processor arrays for controlling focal length or for tuning the depth of field”, Photonics Lett. Pol., vol. 3, no. 1, pp. pp. 44–46, Mar. 2011.