Quick Answer: The Fluorescent Microscope, Research is a research-grade light microscope that illuminates specimens with filtered excitation light and shows the longer-wavelength light that fluorescent stains give off. A research fluorescent microscope is used to see labelled cells, nuclei and microorganisms glowing against a dark background.
How Fluorescence Microscopy Works
A fluorescent molecule absorbs light of one colour and emits light of a longer wavelength a moment later. DAPI, for example, absorbs ultraviolet light and glows blue when bound to DNA, while fluorescein absorbs blue light and glows green. A fluorescence microscope uses this by lighting the specimen with only the excitation colour and then blocking that colour on the way to the eye, so only the emitted glow is seen.
In most fluorescence microscopes this happens through the objective, a layout called epi-illumination. Light from the source passes an excitation filter, is reflected down onto the specimen by a dichroic mirror, and the emitted light travels back up through the same mirror and an emission filter to the eyepieces. The three optical parts are grouped in a filter cube chosen for each stain. The listing does not specify the light source or the filter cubes supplied.
LabEquip lists this Research model alongside an Advanced Research version and a Malaria Detection version. The listing names the level only, so compare them on filter sets, light source and camera provision.
Specifications
| Technique | Fluorescence microscopy with excitation and emission filtering |
| Image | Bright stained structures on a dark background |
| Typical stains | DAPI, fluorescein (FITC), rhodamine, acridine orange |
| Working conditions | Darkened room; eyes shielded from direct excitation light |
| Related models | Advanced Research and Malaria Detection versions |
| Light source and filter cubes | Confirm at enquiry |
Applications
- Immunofluorescence: locating proteins in cells with fluorescently labelled antibodies
- Nuclear staining with DAPI or Hoechst to count cells or examine nuclei
- Acridine orange staining of bacteria and yeasts in microbiology teaching
- Checking fluorescent protein expression in research samples
Care & Handling
- If the research fluorescent microscope uses a mercury or metal-halide lamp, log the burner hours and replace it before it starts to flicker.
- Handle filter cubes by their frames; fingerprints on filter surfaces scatter light and raise the background.
- Close the excitation shutter whenever you are not actually looking, to slow fading of the specimen.
Why Choose LabEquip
University departments, research institutes and hospital research laboratories working with fluorescent stains are the buyers of this model. It is listed in the LabEquip Microscope & Optics range; list the stains you use on the contact page so filter sets can be matched.
Frequently Asked Questions
What is a filter cube?
A holder containing an excitation filter, a dichroic mirror and an emission filter matched to one group of stains. Changing cubes changes which stain is seen, so each stain needs a cube whose filters match its absorption and emission colours.
Why does my fluorescence fade while I watch?
That is photobleaching: the excitation light gradually destroys the fluorescent molecules. Close the shutter when not looking, use the lowest light that gives a usable image, and mount specimens in an antifade medium.
Why must the room be dark?
Fluorescent signals are faint compared with room light. Stray light lowers contrast and hides weak staining, and a darkened room also lets the viewer’s eyes adapt, making dim structures easier to see.
Is the excitation light harmful to the eyes?
Ultraviolet and intense blue light can damage the eyes. Never look into the light path or at the specimen from the side while the shutter is open, and view only through the eyepieces, where the emission filter blocks the excitation light.
Can it also be used for ordinary brightfield work?
Many fluorescence microscopes also have a transmitted-light path for brightfield viewing, which helps to find and focus the specimen before switching to fluorescence. Check whether this model includes one if you need both.
How should fluorescent slides be stored?
In a closed slide box in the dark, ideally refrigerated, since light and warmth speed fading. Seal the coverslip edges if the mountant does not harden, and image slides as soon as practical after staining.
Last Updated: September 2026
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