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Design of two- and three-element diffractive Keplerian telescopes.

D A Buralli, G M Morris

|August 19, 2010

Summary

Simple diffractive telescopes using two or three elements achieve diffraction-limited performance for monochromatic applications. These all-diffractive systems offer comparable optical performance and diffraction efficiency.

Area of Science:

Optics and Photonics
Telescope Design
Diffractive Optics

Background:

Diffractive optical elements offer unique design possibilities.
Monochromatic applications require specialized telescope designs.
Achieving diffraction-limited performance is a key goal in optical system design.

Purpose of the Study:

To describe design procedures for simple two- and three-element diffractive telescopes.
To evaluate the optical performance and diffraction efficiency of these systems.
To demonstrate the feasibility of diffraction-limited performance in all-diffractive telescopes.

Main Methods:

Analytical solution of design equations to set Seidel aberrations for a two-element design.
Computer optimization to refine the design of doublet and triplet diffractive telescopes.

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Evaluation of optical performance and diffraction efficiency.

Main Results:

Successful design procedures for two- and three-element diffractive telescopes were established.
The two- and three-element designs demonstrated similar optical performance and diffraction efficiency.
Diffraction-limited performance was achieved in these all-diffractive systems.

Conclusions:

Simple diffractive telescopes can be designed to achieve diffraction-limited performance.
Two- and three-element designs provide comparable results for monochromatic applications.
All-diffractive telescope systems are viable for high-performance imaging.