Stereo Fluorescence Microscope

What is the Stereo Fluorescence Microscope?

A stereo fluorescence microscope combines low-magnification stereoscopic viewing with fluorescence excitation. It is used to examine fluorescent structures on larger or whole specimens while keeping a three-dimensional view and long working distance.

Overview

A stereo fluorescence microscope provides two slightly different viewing angles for a three-dimensional perception of the specimen, with a long working distance that allows manipulation and dissection. A fluorescence module adds episcopic illumination, filter sets and often a light-emitting diode source, so fluorescent markers can be located on whole organisms, plants, insects or components. Zoom optics give a continuous magnification range instead of discrete steps, which suits scanning a specimen and then zooming in. Depth of field is greater than in compound microscopes, and both reflected and transmitted light are available. It is useful for sample selection and correlation before higher-resolution imaging.

How does it work?

A fluorescence microscope illuminates the specimen with a selected excitation wavelength using a filter cube containing an excitation filter, a dichroic mirror and an emission filter. Fluorophores in the specimen absorb the excitation light and emit at longer wavelengths. The dichroic mirror reflects the excitation light onto the specimen and transmits the emitted light to the objective and detector, so background illumination is largely excluded. The specimen therefore appears bright against a dark background, giving high contrast and specificity. Multiple filter sets allow different fluorophores to be imaged in turn, and excitation and emission bands must be chosen to avoid overlap between channels. Bright sources, efficient filters and high-numerical-aperture objectives determine sensitivity.

What are the key features?

• Stereoscopic three-dimensional viewing
• Fluorescence module with filter sets
• Continuous zoom magnification range
• Long working distance for manipulation
• LED fluorescence illumination option

What are the technical specifications?

A typical stereo fluorescence microscope configuration offers zoom range of 0.7×–4.5×, total magnification of 7×–90× with 10× eyepieces, working distance of About 100 mm, fluorescence excitation of 365, 470, 530 nm LED, filter sets of GFP, DsRed, DAPI and eyepiece of 10× or 20× widefield. Values are indicative of the product class; the exact figures for each configuration are confirmed on the quotation and the calibration documents supplied with the instrument.

Which applications is it used for?

The Stereo Fluorescence Microscope is used in whole-organism fluorescence screening, plant and insect fluorescence examination, zebrafish and embryo sorting and electronic component and materials inspection. Across the wider Fluorescence Microscopes class, laboratories also deploy it for immunofluorescence and cell biology, fluorescence in-situ hybridisation and microbiology and viability staining.

Which standards and certifications apply?

Relevant standards and methods include ISO 8036, ISO 19012-1, ISO 9345-1, ISO 8255-1 and IEC 61010-1. Certification candidates for this model are CE and ISO 9001 manufacturing; each is to be confirmed for the specific configuration before shipment, and certificates are supplied only where they have been issued.

Protect the specimen from unnecessary light to reduce photobleaching, and use the lowest excitation intensity that gives adequate signal. Select filter sets that match the fluorophores and avoid spectral overlap between channels. Keep filters, dichroic mirrors and objectives clean, since contamination causes background fluorescence and scattering. Mercury and xenon lamps need warm-up, consistent alignment and careful disposal, while light-emitting diodes are stable and long-lived. Verify background and uniformity with a blank slide before imaging. Record excitation and emission settings with the images for reproducibility, and maintain the camera and software for quantitative work.

How do I select the right Stereo Fluorescence Microscope?

Select a stereo fluorescence microscope for fluorescent features on larger or whole specimens where three-dimensional viewing and manipulation are needed. Confirm the working distance suits the specimen and tools, the zoom range covers the required magnifications, and the filter sets match the fluorophores. For fine detail, plan to follow with a compound or confocal system.

How does it compare with other Fluorescence Microscopes variants?

Choose a fluorescence microscope when specific molecules must be detected through fluorescent labels or natural autofluorescence. Match the filter sets to the fluorophores in use, such as DAPI for nuclei or FITC for green emission, and confirm the excitation source covers all required wavelengths. Decide between an upright configuration for slides and sections and an inverted one for live cells in dishes. For optical sectioning and three-dimensional imaging, a confocal system is required. Consider LED sources for stability and low running cost versus arc lamps for very high intensity. Check objective numerical aperture, transmission and correction, and the camera sensitivity for the emission wavelengths used.