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Confocal Fluorescence Microscopy

Confocal Fluorescence Microscopy

Confocal microscopy is an advanced microscopic technique. The prime advantage of the confocal microscope over other microscopy techniques is its ability to block the out-of-focus light from the illuminated samples using pinholes. It is widely used with fluorescence optics to obtain high-resolution, sharp contrast images. Unlike optical microscopes, confocal microscopes use a focused beam of light laser to scan the entire sample surface at different z-planes. These microscopes are, therefore,...

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Super-resolution Fluorescence Microscopy

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Updated: Jul 7, 2026

Low-cost Custom Fabrication and Mode-locked Operation of an All-normal-dispersion Femtosecond Fiber Laser for Multiphoton Microscopy

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Published on: November 22, 2019

Two-photon fluorescence microscopy with a diode-pumped Cr:LiSAF laser.

G Robertson, D Armstrong, M J Dymott

|April 20, 1997

Summary

High-quality two-photon fluorescence microscopy images were acquired using a Cr:LiSAF laser. This technique offers improved depth penetration and reduced dye bleaching compared to traditional confocal microscopy.

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Conducting Multiple Imaging Modes with One Fluorescence Microscope

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Low-cost Custom Fabrication and Mode-locked Operation of an All-normal-dispersion Femtosecond Fiber Laser for Multiphoton Microscopy

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Published on: November 22, 2019

Conducting Multiple Imaging Modes with One Fluorescence Microscope

Conducting Multiple Imaging Modes with One Fluorescence Microscope

Published on: October 28, 2018

Area of Science:

Biomedical Optics
Microscopy Techniques
Laser Technology

Background:

Confocal fluorescence microscopy, while valuable, faces limitations in imaging depth and photobleaching.
Two-photon excitation microscopy (TPEM) offers potential advantages for deep-tissue imaging and reduced photodamage.

Purpose of the Study:

To demonstrate the efficacy of an all-solid-state Cr:LiSAF laser for high-quality two-photon fluorescence microscopy.
To compare the performance of TPEM with conventional single-photon confocal fluorescence microscopy.

Main Methods:

Utilized an all-solid-state, self-mode-locked Cr:LiSAF laser system for TPEM image acquisition.
Acquired comparative single-photon confocal fluorescence microscopy images using an argon-ion laser.
Evaluated image quality, depth penetration, and dye bleaching characteristics.

Main Results:

Achieved high-quality two-photon fluorescence microscopy images with the Cr:LiSAF laser.
Demonstrated superior depth penetration in TPEM compared to confocal microscopy.
Observed significantly reduced dye bleaching in TPEM, preserving sample integrity.

Conclusions:

The Cr:LiSAF laser is a viable and effective source for high-performance two-photon fluorescence microscopy.
TPEM using this laser system overcomes key limitations of confocal microscopy, enabling deeper and less damaging imaging.
This advancement holds promise for in vivo biological imaging and advanced microscopy applications.