How should microscope lighting be selected?

Microscope lighting should be selected according to the sample, observation method, working distance, brightness requirement and whether the application needs reflected light, transmitted light or fluorescence excitation.

What is an LED epi-illuminator used for?

An LED epi-illuminator provides reflected light from above the sample and is commonly used for stereo microscope inspection of opaque objects, parts and surface details.

What is LED transmitted light used for?

LED transmitted light is used from below the sample and is suitable for transparent or translucent specimens where internal structure, outlines or contrast need to be observed.

Microscope Lighting

LED epi-illuminators, transmitted light sources and fluorescence excitation lighting for microscope observation

Mecan USA offers microscope lighting options for stereo microscope inspection, transmitted-light observation and fluorescence excitation applications.

The appropriate illuminator depends on the sample surface, transparency, required contrast, working distance and observation method. This page provides an overview of the main lighting groups available for practical microscope workflows.

Reflected Light Transmitted Light LED Ring Light Twin-Arm Light Fluorescence Excitation

Microscope Lighting Lineup

LED Epi-Illuminator

LED epi-illumination accessories for stereo microscopes

Epi / Reflected Light
LED ring lights, LED twin-arm lights, and fiber-optic style illumination options for surface observation, inspection, and general stereo microscope work.

LED Transmitted Light

Transmitted Light
Compact transmitted-light units can be placed on the microscope stage for brightfield-style observation of transparent or semi-transparent specimens.

LED Fluorescence Excitation

Fluorescence Excitation
Single-wavelength LED light sources are available in transmitted, epi, twin-arm, and flashlight-style configurations for fluorescence excitation applications.

Choose Lighting by Observation Method

LED epi-illumination is useful for opaque samples, surface inspection, parts observation and stereo microscope work.
LED transmitted light is suitable for transparent or translucent samples where light passes through the specimen from below.
Fluorescence excitation lighting uses narrow-band LED light for applications that require excitation of fluorescent samples or reagents.

Ring lights provide even illumination around the objective and are commonly used for general inspection.
Twin-arm and flexible-arm lights allow the light angle to be adjusted to highlight surface texture, edges and shadows.
The best lighting configuration depends on sample shape, reflectivity, working distance and the contrast needed for observation.

Selection Notes

Lighting Type	Main Use	Typical Selection Point
LED Epi-Illuminator	Reflected-light observation of opaque samples and surfaces.	Choose by required brightness, working distance, light angle and whether even or directional illumination is preferred.
LED Transmitted Light	Observation of transparent or translucent samples from below.	Choose by illumination area, brightness, sample size and compatibility with the microscope stage.
LED Fluorescence Excitation	Fluorescence excitation using selected LED wavelengths.	Confirm excitation wavelength, emission filter, sample fluorescence and optical configuration before selection.

Note: For fluorescence applications, the LED wavelength, excitation filter, emission filter and sample/reagent characteristics should be checked together.