Fabrication methods for micro compounds optics

Details Fabrication methods for micro compounds optics Fabrication methods for micro compounds optics

2008-04-29

2008-04-29

Lavarias, Arnel (Department: 2872)

Optical: systems and elements

Diffraction

From zone plate

C359S742000, C359S355000, C216S026000, C257S797000, C438S975000

Reexamination Certificate

active

07365909

ABSTRACT:
Methods for fabricating refractive element(s) and aligning the elements in a compound optic, typically to a zone plate element. The techniques are used for fabricating micro refractive, such as Fresnel, optics and compound optics including two or more optical elements for short wavelength radiation. One application is the fabrication of the Achromatic Fresnel Optic (AFO). Techniques for fabricating the refractive element generally include: 1) ultra-high precision mechanical machining, e.g,. diamond turning; 2) lithographic techniques including gray-scale lithography and multi-step lithographic processes; 3) high-energy beam machining, such as electron-beam, focused ion beam, laser, and plasma-beam machining; and 4) photo-induced chemical etching techniques. Also addressed are methods of aligning the two optical elements during fabrication and methods of maintaining the alignment during subsequent operation.

REFERENCES:
patent: 6269145 (2001-07-01), Piestrup et al.
patent: 2004/0125442 (2004-07-01), Yun et al.

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