Large zooming range adaptive microscope employing tunable objective and eyepiece.

Area of Science:

• Optics and Photonics
• Microscopy Technology
• Biomedical Engineering

Background:

• Conventional microscopes have limited magnification and slow zoom, hindering the observation of dynamic biological processes.
• Capturing rapid cellular activities requires advanced imaging tools with seamless magnification adjustments.

Purpose of the Study:

• To develop and demonstrate an adaptive microscope with a large, continuous zooming capability.
• To overcome the limitations of discrete magnification and slow response times in traditional microscopes for live specimen imaging.

Main Methods:

• Utilized a tunable objective comprising glass lenses and electrowetting liquid lenses.
• Employed a tunable eyepiece with an achromatic eyepiece and an electrowetting liquid lens.
• Controlled focal points via voltage adjustments for seamless zoom and aberration correction.

Main Results:

• Achieved continuous magnification change from approximately 59.1× to 159.2×.
• Obtained a maximum numerical aperture of approximately 0.212.
• Demonstrated aberration correction across a wide wavelength range without mechanical movement.

Conclusions:

• The adaptive microscope offers a large, continuous zoom range and rapid response for observing live specimens.
• The design, utilizing tunable liquid lenses, presents a significant advancement for biological research and clinical examinations.
• This technology has potential applications in dynamic cellular imaging and medical diagnostics.