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Proceedings Paper

Double-prisms neutral density filters: a comparative approach
Author(s): Virgil-Florin Duma
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Paper Abstract

The paper presents a comparative mathematical study of the possible solutions of the double-prisms neutral density filters. After a brief overview of the optical devices used for the attenuation of light (especially in spectrophotometers and colorimeters), the three different arrangements, not only of the double-wedges, but, more generally, of the double-prisms, are considered; two of the solutions, in the double-wedges form, being but suggested in the state-of-the-art. An extension of the existing theory is thus achieved. The characteristic parameters of each of the possible solutions of this optical attenuator are defined, obtained and compared, in order to select the optimal device. From the study, the best solution of the double-prisms neutral density filters, both from the mechanical and from the optical point of view, is ascertained. The designing calculus of the resulted attenuator is also developed.

Paper Details

Date Published: 1 August 2007
PDF: 9 pages
Proc. SPIE 6785, ROMOPTO 2006: Eighth Conference on Optics, 67851W (1 August 2007); doi: 10.1117/12.756801
Show Author Affiliations
Virgil-Florin Duma, Aurel Vlaicu Univ. (Romania)


Published in SPIE Proceedings Vol. 6785:
ROMOPTO 2006: Eighth Conference on Optics

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