The Meiji Techno MT4310L Phase Contrast/ Brightfield Series of biological microscopes have been designed as versatile, modular, ergonomic microscope systems which are ideally suited for use in education, research, or advanced laboratory applications. Equipped with newly upgraded U. Plan Phase and Brightfield Objectives Infinity Corrected, Brightfield 4X, Phase 10X and Phase 40X objectives.

Ergonomic placement of controls allows for stress free operation, increased efficiency and maximum productivity. Operating comfort and ease of use are top design priorities. The MT4310L Series microscopes feature a new computer engineered rigid frame that incorporates low positioned coaxial coarse/fine focus controls and ergonomic stage design for maximum efficiency and comfort while also providing an extremely stable operating platform.

The MT4310L Series offers an outstanding range of features and optical performance with an emphasis on all newly engineered high performance optics based on Meiji Techno’s ICOS™ Optical System (Infinity Corrected Optical System). The new optics provide exceptionally bright, crisp, images, with good color rendition and superior flat fields of view. A modular design facilitates attachment of a variety of accessories such as CMOS/CCD video cameras, digital still cameras, and 35mm cameras. The MT4310L Series Microscopes offer crisp, distortion free, high resolution images in multiple modes of operation. Contrast methods available include: Brightfield and Phase Contrast.

For a full list of magnifications and included parts, please see the tab labeled "What's In The Box".

Meiji Techno Phase Contrast optical components needs to be aligned to the condenser annulus with the phase plate in the objective rear focal plane with a phase telescope, that inserts into one of the microscope eyepiece observation ports. The phase contrast annulus is used in the substage condenser on Meiji Techno’s upright microscope within the condenser turret. The Phase ring in the condenser must be specifically matched to the particular Phase objective equipped with a corresponding phase plate annulus. For example, Phase 10X and Phase 20X both of which contain a phase plate will require condenser annuli having different diameters that correspond to the objective magnification and N.A. (Numerical Aperture). By properly matching the Meiji Techno Condenser annulus to the objective phase plate, the Meiji Techno Phase microscope can be aligned to superimpose illuminating light rays passed through the annulus onto the Phase ring of the objective to achieve proper Phase contrast illumination.

The Ph1 condenser annulus, which contains the smallest aperture, is designed to be used with the lower power 10X and 20X Phase objective. Intermediate magnification objective 40X Phase utilize the Ph 2 annulus, while the highest power and N.A. 100X objective require the Ph 3 annulus, which requires the largest phase annulus.

The Ph1 position in the Phase Condenser Turret facilitates Objectives Phase 10X and Phase 20X

The Ph2 position in the Phase Condenser Turret facilitates Objectives Phase 40X

The Ph3 position in the Phase Condenser Turret facilitates Objectives Phase 100X

The MT4000 Phase Microscopes features include:

• Compact Space Saving Footprint design with ergonomics in mind
• Infinity Corrected Optical System (ICOS™) with all newly designed Planachromatic Phase optics
• Comfortable Siedentopf-type Binocular and Trinocular Viewing heads
• Optional Ergonomic tilting binocular head- Adjustable vertically from 10°to 50° degrees
• Ceramic Coated Stage with Ergonomically Placed Low Position Drop down Control
• Parfocalled Microscope Brightfield and U. Plan Phase Objectives 4x, BF, 10'x PH,40x PH
• Centerable Phase Condenser with centerable phase annuli for 10X, 20X, 40X,100X
• Phase Condenser with Darkfield stop for 40X objective , (Black out postion for Epi-FL models)
• GIF Green Interference filter, 44.0mm diameter unmounted for substage illuminator well
• Centering Eyepiece Telescope to ensure proper condenser/ objective centration
• Tension adjustment control with Coaxial knobs
• Low Positioned Ergonomic Coaxial Coarse and Fine Focus Control
• Smooth Operating Ergonomic Quintuple Nosepiece
• Brightfield and Phase Contrast Observation modes available
• Super Bright LED Koehler illumination, lambertian design
• Integrated 30-Watt Halogen Transmitted illumination System on selected Brightfield and Phase Contrast Models
• Abbe and Zernike Phase Contrast Condensers available
• Integrated Automatic Voltage Sensing Power Supply with localized power cord
• Rear Cord Wrap for easy storage
• Wide Range of Filters and Accessories

Brightfield:

The simplest of all the optical microscopy illumination techniques. Sample illumination is transmitted (i.e., illuminated from below and observed from above) white light and contrast in the sample is caused by absorbance of some of the transmitted light in dense areas of the sample. Brightfield microscopy is the simplest of a range of techniques used for illumination of samples in light microscopes and its simplicity makes it a popular technique. The typical appearance of a brightfield microscopy image is a dark sample on a bright background.

Phase Contrast:

An optical microscopy technique that converts phase shifts in light passing through a transparent specimen to brightness changes in the image. Phase shifts themselves are invisible, but become visible when shown as brightness variations. When light waves travel through a medium other than vacuum, interaction with the medium causes the wave amplitude and phase to change in a manner dependent on properties of the medium. Changes in amplitude (brightness) arise from the scattering and absorption of light, which is often wavelength-dependent and may give rise to colors. Photographic equipment and the human eye are only sensitive to amplitude variations. Without special arrangements, phase changes are therefore invisible.

The MT4000 Series is a newly designed upright biological compound microscope system. Ergonomically designed, precisely manufactured and simple to use stage and coarse and fine controls. To meet the demands of researchers and clinical laboratory specialists. The MT4000 Series was to develop to provide functionality and operational ease. Viewing high quality images, sample changing and photomicroscopy are all conducted with ergonomics in mind. High luminescent LED illumination reduces need for frequent bulb replacement but still provide rugged durability and long life span.

VIEWING HEADS

Model MA815/05 is the Siedentopf-type binocular head and Model MA816/05 is the trinocular head for camera integration. Each head has the eyetubes inclined at 30 ° with the left eyetube having graduated diopter settings. The interpupillary distance is adjustable between 53mm - 75mm. An 80/20 beamsplitter for the trinocular tube can be engaged for photo work.The optional MA957/05, Ergonomic Binocular Viewing Head, has the inclination adjustable from 10 to 50 degrees to fit users of different heights. The Ergonomic Trinocular model comes with the MA958, photo/video attachment with sliding 80/20 beam-splitter (Included in MT4300ED).

EYEPIECES

10X Widefield High Eyepoint eyepieces F.N.20 are standard, and 15X and 20X eyepieces are available as an option. A Widefield High Eyepoint 10X focusable eyepiece that accepts 21mm reticules is also available.

OBJECTIVE CHANGER

Quintuple nosepiece provides effortless objective changes with smooth-operating, ball bearing mounted.

OBJECTIVES

Meiji Techno America offers an assortment of Planachromat Infinity Corrected (ICOS) objectives for Brightfield, Darkfield and Phase Contrast observation modes.

STAGE

Ceramic coated standard right-handed or optional left-handed controls, flat top stage 171mm x 115mm and travels 78mm(X) x 52mm(Y). Ergonomically positioned coaxial drop down controls. Available with motorized focus and stage controls.

CONDENSER

New design centerable Abbe 1.25 N.A. Condenser with built-in iris diaphragm in dovetail mount.

ILLUMINATION

Powerful white LED illumination provides enhanced image quality and brightness for the observation of specimens and photomicroscopy.

PHOTOMICROGRAPHY

Meiji Techno offers a broad range of digital video cameras which offers excellent sensitivity, high resolution and a wide dynamic range for the most demanding brightfield and darkfield microscopy applications including clinical pathology and cytology, life sciences and geology. Some models has included software, that can preview and capture still shots and live videos to a PC or Mac with USB port or HDMI connectivity.