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Applied Spectroscopy

Applied Spectroscopy

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  • Vol. 52, Iss. 6 — Jun. 1, 1998
  • pp: 783–789

Optical Sectioning Fluorescence Spectroscopy in a Programmable Array Microscope

Quentin S. Hanley, Peter J. Verveer, and Thomas M. Jovin

Applied Spectroscopy, Vol. 52, Issue 6, pp. 783-789 (1998)


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Abstract

We report the use of a programmable array microscope (PAM) for the acquisition of spectrally resolved and high-throughput optical sections. The microscope is based on the use of a spatial light modulator for defining patterns of excitation and/or detection of fluorescence. For obtaining optically sectioned spectral images, the entrance slit of an imaging spectrograph and a line illumination pattern defined with a spatial light modulator are placed in conjugate optical positions. Compared to wide-field illumination, optical sectioning led to greater than 3 X improvement in the rejection of outof-focus fluorescence emission and nearly 6 X greater peak-to-background ratios in biological specimens, yielding better contrast and spectral characterization. These effects resulted from a reduction in the artifacts arising from spectral contributions of structures outside the region of interest. We used the programmable illumination capability of the spectroscopic system to explore a variety of excitation/detection patterns for increasing the throughput of optical sectioning microscopes. A Sylvester-type Hadamard construction was particularly efficient, performing optical sectioning while maintaining a 50% optical throughput. These results demonstrate the feasibility of full-field highly multiplexed confocal spectral imaging.

Citation
Quentin S. Hanley, Peter J. Verveer, and Thomas M. Jovin, "Optical Sectioning Fluorescence Spectroscopy in a Programmable Array Microscope," Appl. Spectrosc. 52, 783-789 (1998)
http://www.opticsinfobase.org/as/abstract.cfm?URI=as-52-6-783

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