Scanned optical fiber confocal microscope

David L. Dickensheets; Gordon S. Kino

doi:10.1117/12.172104

4 April 1994 Scanned optical fiber confocal microscope

Proceedings Volume 2184, Three-Dimensional Microscopy: Image Acquisition and Processing; (1994) https://doi.org/10.1117/12.172104
Event: IS&T/SPIE 1994 International Symposium on Electronic Imaging: Science and Technology, 1994, San Jose, CA, United States

Abstract

The size and weight of conventional optical microscopes often makes them inconvenient for use on the human body or for in-situ examination during materials processing. We describe a new fiber-optic scanning confocal optical microscope which could have a total outside diameter as small as 1 mm, and should lend itself to applications in endoscopy or to optical in vivo histology. The first experimental device utilizes a single-mode optical fiber for illumination and detection. The scanning element is a mechanically resonant fused silica cantilever 1.5 cm long and 0.8 mm across, with a micromachined two-phase zone plate objective mounted at one end. The cantilever is electrostatically scanned near resonance in two dimensions, generating a Lissajous pattern which is scan converted to conventional video for real time display or digitization. The objective lens has N.A. equals 0.25 at (lambda) equals 0.6328 micrometers , with a measured spot size of 1.8 micrometers FWHM.

Citation Download Citation

David L. Dickensheets and Gordon S. Kino "Scanned optical fiber confocal microscope", Proc. SPIE 2184, Three-Dimensional Microscopy: Image Acquisition and Processing, (4 April 1994); https://doi.org/10.1117/12.172104

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