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Related Experiment Video

Updated: Jun 5, 2025

Clarifying and Imaging Candida albicans Biofilms

Clarifying and Imaging Candida albicans Biofilms

Published on: March 6, 2020

Diffractive hyperchromatic objective for chromatic confocal microscopy.

Jiabin Chen¹, Shaobai Li¹, Wenjun Kang¹

¹Wyant College of Optical Sciences, The University of Arizona, Tucson, Arizona 85721, USA.

Biomedical Optics Express

|December 16, 2024

Summary

This summary is machine-generated.

Researchers developed a novel hyperchromatic confocal microscope using diffractive optics to overcome depth limitations. This advanced microscope achieves deeper imaging and high resolution in biological samples.

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Area of Science:

Optical microscopy
Biomedical imaging
Diffractive optics

Background:

Conventional achromatic objectives in chromatic confocal microscopy have limited focal shift, restricting imaging depth.
Diffractive optical elements (DOEs) offer a small Abbe number, enabling significant longitudinal chromatic shift.

Purpose of the Study:

To design and fabricate a hyperchromatic confocal microscope overcoming the depth limitations of conventional systems.
To leverage diffractive optics for enhanced chromatic aberration control and increased imaging depth.

Main Methods:

Designed a hyperchromatic confocal microscope utilizing diffractive optical elements.
Fabricated the optical system using single-point diamond turning (SPDT).
Evaluated imaging performance across a 600-810 nm wavelength range.

Main Results:

Achieved a maximum imaging depth of 750 µm.
Obtained a lateral resolution of 0.78 µm.
Successfully imaged detailed structures in biological samples like cucumber seeds, pig kidney, and human skin.

Conclusions:

The hyperchromatic confocal microscope effectively enhances imaging depth and resolution.
The system demonstrates significant potential for high-resolution biological imaging at greater depths.
Diffractive optics provide a viable solution for overcoming limitations in chromatic confocal microscopy.