Dark-field optical microscope

Dark-field optical microscopy uses an annular baffle to block the central light rays, allowing only oblique light to illuminate the sample. Light scattered from the edges of the sample enters the objective lens to form a bright image, while the background remains dark. It is used to observe the internal structures, tiny particles, and surface textures of unstained transparent samples, and is commonly employed in biological cell, crystal, and material detection.
Selection
Consider sample transparency when selecting; suitable for highly transparent samples. Match the numerical aperture of the objective to be less than that of the condenser. Check the integrity of the dark-field accessories specific to the condenser. Choose the corresponding resolution model based on the size of the observation target. Confirm the stability of the illumination system. Note the requirement for a light-free operating environment.

Terms

Standards

Instruments

Optical inspection system and Modular design can be used to upgrade the functions of polarization and dark field observation; coarse fretting coaxial focusing system fretting grid value of 2 μ m, cylindrical roller guide drive to ensure smooth lifting, suitable for different Film thickness workpiece detection.

$ 6012.00

It has the function of switching between light and dark field of view, supports 40X-1600X magnification range, and uses oblique illumination to make the outline of the sample clearly visible. It is suitable for morphological observation of unstained biological samples.

$ 761.00

Infinity Optical inspection system, equipped with 5X-50X Bright & Dark Field objective lens, working distance 2.5-9 mm, mildew-proof design and mechanical mobile stage, support polarized observation and camera function.

$ 6496.00

Infinity Optical inspection system and Modular design are adopted, stress-free long working distance flat field objective is equipped, the fretting grid value is 2 μ m, the rotating stage has 360 ° scale, and the polarizing observation device is flexibly moved in and out of the optical path.

$ 2300.00

Infinity Optical inspection system and Modular function design can realize polarization and dark field observation; Coarse fretting coaxial focusing system fretting grid value of 2 μ m, guide column lifting device to adapt to different Film thickness workpiece detection needs.

$ 2252.00

Optical inspection system with infinity, equipped with long working distance condenser and working distance 55mm, swirl/spin swing-out condenser system can observe high culture dishes without contamination, compact and high rigidity body to meet vibration protection requirements.

$ 3268.00

Optical inspection system with infinity, long working distance objective lens such as 10X0.25 working distance 4.3mm, swirl/spin swing-out concentrating system can observe high culture dishes without contamination, Modular fluorescence system is easy to adjust.

$ 10530.00

Optical inspection system and Modular design can be used to upgrade the function of polarization and dark field; equipped with a large moving range stage (204mm × 204mm) and a focusing mechanism with a fretting grid value of 0.7 μm, compact, stable and comfortable operation.

$ 4398.00

Equipped with UIS Infinity Optical inspection system, supports phase contrast observation and dark field function, magnification 40X-1600X, uses 6V/20W halogen lamp Kohler lighting, expandable fluorescent and vertical lighting device.

$ 3449.00

Adopt hinged tri-head, total magnification 40X-1000X, equipped with color difference objective lens and adjustable pupil distance 55-75mm, support phase contrast, dark field and other observation methods, double-decked mechanical stage moving range 75X45mm.

$ 687.00

Equipped with large field of view eyepiece and long working distance flat field color difference objective lens, working distance up to 50mm, with phase contrast device to observe unstained transparent living body, fretting grid value of 2μm to ensure accurate focusing.

$ 2784.00

Optical inspection system with infinite distance provides clear imagery; ultra-long working distance concentrating system up to 70mm, supports high culture dish observation; compact and stable main body design, effective vibration protection.

$ 2746.00

Optical inspection system with infinity and Modular function design, equipped with flat-field color difference-cancelling fluorescent objective, with a fretting grid value of 2 μm, supports a variety of excitation bands of fluorescent filter sets to meet the needs of scientific research and observation.

$ 3753.00

Optical inspection system infinity to ensure good imagery mass, 70mm long working distance condenser to support high culture dish observation, coarse fretting coaxial focusing system fretting grid value of 2μm to achieve accurate focusing.

$ 2946.00

Optical inspection system with infinity, equipped with 4X-100X flat field color difference elimination objective lens and WF10X-16X large field of view eyepiece, providing NA1.25 condenser lens and 0.001mm fine-tuning accuracy, support phase contrast observation function, comfortable and convenient operation.

$ 1913.00