Leica DMLS microscope - Modular and ergonomic design for versatile use
The Leica DMLS belongs to the DML series of modular microscopes, allowing extensive customisation according to specific user requirements. It consists of a robust base with integrated transmitted light illumination, a stand with vibration-damping feet, an optical tube that can be adapted directly or via intermediate systems, and a set of interchangeable optical components. This modularity allows the DMLS to be used in a variety of configurations, ranging from classic transmitted light observation to more advanced techniques such as fluorescence or polarisation.
Ergonomics is at the heart of its design: the workstation must be stable, at the correct height (70–80 cm), and equipped with an adjustable seat to ensure fatigue-free observation. The microscope can be fitted with ergonomic modules to adjust the height of the viewing port and tilting tubes for optimum comfort.
Optical performance and precision illumination
The DMLS uses Leica infinity (∞) tube length objectives with M25 threading, compatible with 200 mm focal length optical tubes. It accepts C PLAN achromatic, N PLAN planachromatic, HC PL FLUOTAR semi-apochromatic and HC PL APO apochromatic objectives. Transmitted light illumination is provided by a 12 V/30 W halogen lamp integrated into the base, with intensity adjustment via a graduated knob.
Köhler illumination is facilitated by an adjustable field diaphragm and aperture diaphragm, ensuring a contrasted and homogeneous image. The microscope can also be equipped with immersion condensers (oil or water) to improve resolution with high numerical aperture objectives.
3. Compatibility with observation techniques
The DMLS supports several imaging techniques:
- Phase contrast: thanks to PH objectives and centred light rings in the condenser.
- Dark field: with objectives with an aperture ≤ 0.75 and suitable condenser discs.
- Polarisation: via the addition of an analyser and a polariser, as well as condenser lenses without mechanical constraints.
- Fluorescence: with filter cubes, discharge lamps (Hg, Xe) and specific illumination modules.
It is also compatible with TV microscopy and photomicrography, thanks to trinocular tubes and adapters for C-mount or B-mount cameras. Linear measurement and thickness measurement devices are available for quantitative applications.
