## Electromagnetic Design of an All-Diffractive Millimeter-Wave Imaging System

Applied Optics, Vol. 43, Issue 12, pp. 2431-2438 (2004)

http://dx.doi.org/10.1364/AO.43.002431

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### Abstract

We present the design and electromagnetic analysis of an all-diffractive millimeter-wave imaging system having a field of view of ±15°. This system consists of two 16-level diffractive lenses, with the stop in contact with the first lens. By considering the Seidel aberrations for a diffractive lens and applying the corresponding stop shift formula, we established the expressions of third-order wave aberrations for this system. By setting all primary Seidel aberrations to zero and solving the corresponding system of equations, we obtained two sets of solutions for this two-element all-diffractive system, which totally compensate for all Seidel aberrations. To assess image system performance, we apply the finite-difference time-domain technique and a vector plane-wave spectrum method, in combination, to validate the performance of the system. To reduce the computational cost and thereby enable the complete electromagnetic analysis of the system, a four-step analysis procedure has been developed and applied as an electromagnetic system model.

© 2004 Optical Society of America

**OCIS Codes**

(050.1970) Diffraction and gratings : Diffractive optics

(110.0110) Imaging systems : Imaging systems

**Citation**

Caihua Chen, Shouyan Shi, and Dennis W. Prather, "Electromagnetic Design of an All-Diffractive Millimeter-Wave Imaging System," Appl. Opt. **43**, 2431-2438 (2004)

http://www.opticsinfobase.org/ao/abstract.cfm?URI=ao-43-12-2431

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