Search Menu
Photonics Media Photonics Buyers' Guide Photonics Spectra BioPhotonics EuroPhotonics Vision Spectra Photonics Showcase Photonics ProdSpec Photonics Handbook

Lithography Yields Micro-Optics Imaging System

Facebook Twitter LinkedIn Email Comments
 Researchers at the University of Arizona in Tucson and at the University of Oulu in Finland have fabricated a micro-optics imaging system for a miniature microscope using a gray-scale lithographic printing technique with sol-gel glass. They reported the work in the April 5 edition of Optics Express.

The scientists employed a "pixelated" gray-scale photomask through which they exposed the photosensitive sol-gel material to ultraviolet radiation. The photomask featured 4 X 4-µm pixels with 129 gray-scale levels ranging in optical density from 0.12 to 1.4. They then immersed the polymerized material in developer to free the 1.3-mm-diameter lenses, which featured a 56-µm sag, and characterized the fabricated elements using an optical profilometer, Fizeau and Mach-Zehnder interferometers, and a Shack-Hartmann wavefront sensor.

In a test of the assembled system, which incorporated three of the antireflection-coated lenses, the researchers imaged glass spheres with diameters of 10 to 30 µm and a grating with 600 line pairs per millimeter. They noted that, although the imaging quality of the system is expected to improve, it already can be used to resolve cell-size features.

Photonics Spectra
May 2004
As We Go To PressBreaking Newsgray-scale lithographic printing techniquemicro-optics imaging systemMicroscopyminiature microscopePresstime BulletinSensors & Detectorssol-gel glassUniversity of ArizonaUniversity of Oulu

back to top
Facebook Twitter Instagram LinkedIn YouTube RSS
©2020 Photonics Media, 100 West St., Pittsfield, MA, 01201 USA, [email protected]

Photonics Media, Laurin Publishing
x Subscribe to Photonics Spectra magazine - FREE!
We use cookies to improve user experience and analyze our website traffic as stated in our Privacy Policy. By using this website, you agree to the use of cookies unless you have disabled them.