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Applied Optics

Applied Optics

APPLICATIONS-CENTERED RESEARCH IN OPTICS

  • Vol. 35, Iss. 25 — Sep. 1, 1996
  • pp: 5102–5107

Realization and optimization of planar refracting microlenses by Ag–Na ion-exchange techniques

Jochen Bähr and Karl-Heinz Brenner  »View Author Affiliations


Applied Optics, Vol. 35, Issue 25, pp. 5102-5107 (1996)
http://dx.doi.org/10.1364/AO.35.005102


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Abstract

We report the fabrication of planar microlenses with numerical apertures (N.A.’s) of 0.2 by field-assisted Ag–Na ion exchange in glass. To measure the N.A. of microlenses, different definitions can be used. We discuss the issue of measuring the N.A. and suggest an additional definition based on diffraction-limited performance. According to a simple model, the N.A. of a spherical lens is limited by the maximum index difference. Owing to this model, the N.A. for Ag–Na ion exchange is limited to a value of ~0.1. From measurements of microlenses, fabricated by field-assisted ion exchange, we obtained N.A.’s as high as 0.2, providing for diffraction-limited performance within the whole aperture.

© 1996 Optical Society of America

History
Original Manuscript: October 16, 1995
Revised Manuscript: February 29, 1996
Published: September 1, 1996

Citation
Jochen Bähr and Karl-Heinz Brenner, "Realization and optimization of planar refracting microlenses by Ag–Na ion-exchange techniques," Appl. Opt. 35, 5102-5107 (1996)
http://www.opticsinfobase.org/ao/abstract.cfm?URI=ao-35-25-5102

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