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Applied Optics

Applied Optics

APPLICATIONS-CENTERED RESEARCH IN OPTICS

  • Editor: Joseph N. Mait
  • Vol. 48, Iss. 14 — May. 10, 2009
  • pp: 2678–2685

Neutral density filters with Risley prisms: analysis and design

Virgil-Florin Duma and Mirela Nicolov  »View Author Affiliations


Applied Optics, Vol. 48, Issue 14, pp. 2678-2685 (2009)
http://dx.doi.org/10.1364/AO.48.002678


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Abstract

We achieve the analysis and design of optical attenuators with double-prism neutral density filters. A comparative study is performed on three possible device configurations; only two are presented in the literature but without their design calculus. The characteristic parameters of this optical attenuator with Risley translating prisms for each of the three setups are defined and their analytical expressions are derived: adjustment scale (attenuation range) and interval, minimum transmission coefficient and sensitivity. The setups are compared to select the optimal device, and, from this study, the best solution for double-prism neutral density filters, both from a mechanical and an optical point of view, is determined with two identical, symmetrically movable, no mechanical contact prisms. The design calculus of this optimal device is developed in essential steps. The parameters of the prisms, particularly their angles, are studied to improve the design, and we demonstrate the maximum attenuation range that this type of attenuator can provide.

© 2009 Optical Society of America

OCIS Codes
(220.0220) Optical design and fabrication : Optical design and fabrication
(230.0230) Optical devices : Optical devices
(230.5480) Optical devices : Prisms
(350.2450) Other areas of optics : Filters, absorption
(120.4880) Instrumentation, measurement, and metrology : Optomechanics

ToC Category:
Optical Devices

History
Original Manuscript: February 23, 2009
Revised Manuscript: April 12, 2009
Manuscript Accepted: April 13, 2009
Published: May 5, 2009

Citation
Virgil-Florin Duma and Mirela Nicolov, "Neutral density filters with Risley prisms: analysis and design," Appl. Opt. 48, 2678-2685 (2009)
http://www.opticsinfobase.org/ao/abstract.cfm?URI=ao-48-14-2678


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