Leica DM4 P, 2700 P & 750 P

_DM-Polarization-buehneCrystal Clear

Upright Microscopes for Polarization Leica DM4 P, DM2700 P & DM750 P

If you would like to investigate crystalline structures, polarization microscopy will serve you best. Whether it be minerals, plastics and polymers, drugs and pharmaceuticals, or pigments and cement, with our polarization microscopes you will see what interests you most as a researcher or in quality assurance.

Depending on your application, you can choose from three different systems for polarization microscopy:

  • The fully coded and semi-automated Leica DM4 P
  • The manual Leica DM2700 P
  • The Leica DM750 P educational microscope

 

 

_DM4-P_opticsGet Optimal Results

You need a few components to get what you aim for in polarization. These are the most important:

  • Strain-free optics, because you need to be sure that the observed birefringence results from the sample and not from the optics
  • LED illumination is crucial, because it lights the samples homogenously and at a constant color temperature
  • Polarizers will make birefringence visible and a rotatable stage enables you to align the sample and optical axis
  • You need a Bertrand lens for conoscopic observation of the optical axis and compensators for measurement tasks

 

 

_light-ledThere will be Light!

LED illumination saves you money in many ways: It consumes less energy than halogen illumination, and does not need to be replaced, causing downtime of your instrument, because it has a lifetime of up to 25,000 hours. Further advantages:

  • LED lights your samples homogeneously and at a constant color temperature, providing you with a realistic impression of your sample
  • LED adjusts light intensity fast so you can work smoothly
  • LED requires no daylight filter since the LED already provides constant light temperature of 4500 K
  • LED produces little heat, and therefore does not need a cooling fan
  • LED lets you work undisturbed, because no cooling fan makes a noise around you

 

 

_DM4-P_side_01Completely at Your Service: Leica DM4 P

If you want to do everything in polarization microscopy, you can with the Leica DM4 P.

Store and recall information with coded components

  • When you change objectives, illumination intensity and aperture settings are recalled with the Illumination Intensity Control and Contrast Manager.
  • Acquired images are always calibrated due to the coded nosepiece.

Identify interesting structures

  • With the large 25-mm field of view you get a perfect overview.
  • A lower magnification rather than the detailed view often reveals the specific information you need – just think of flow or deformation structures or zonation by cooling processes.

 

 

_DM4-P_objectiveGet your Nosepiece Around it!

Get different sample information from different magnifications of the 6-objective nosepiece.

  • Use a 2.5x overview objective to identify macro structures in your sample
  • Change to 63x magnification for detailed investigations of optical properties by means of conoscopy
  • Switch to 100x to inspect phase reactions along grain boundaries

By the way: The nosepiece is also coded, so that it supports you intelligently.

 

 

_illumination_03Best of Both Illuminations

You can configure the Leica DM4 P with LED illumination either for transmitted light or incident light or with LED for both transmitted light an incident light in one go.

  • Incident light is mandatory for all who perform reflectivity measurements, for example looking at ores or coal.
  • Transmitted light is required for birefringence measurements, for example in inspection of geological thin sections, polymer foils, or drugs.
  • For specific applications such as in geological research, both are necessary.

When the microscope is equipped for both incident and transmitted light, the associated objective, that is with or without cover glass correction, should be used from magnification >10x.

 

 

Investigate Optical Properties

Conoscopy is used to investigate interference figures. Their shape and the modifcation achieved by compensators yields information about the optical properties of the investigated material. You can determine the number of optical axis, the angle(s) of optical axis and the optical character of the material.

The Leica DM4 P is ideally suited to conoscopy:

  • Strain-free objectives with high magnification and high numerical aperture are a must for this application.
  • Use special 63x Leica objectives that fulfill the highest requirements of polarization class 5 to obtain optimal results.
investigate-interference_01_548fb13ba1

Conoscopic image of Brookit, TiO2, with strong dispersion colors Uni-axial interference figure of thick calcite plate, perpendicular to optical axis Bi-axial interference figure of thin biotite crystal in diagonal position at circular polarized light. Position of optical axis can be clearly identified

 

 
 

Great Flexibility: Leica DM2700 P

If you do not need full automation and maximum reproducibility, the Leica DM2700 P is your instrument of choice. Apart from the automation, it offers a flex_dm2700p-double_01ibility which is similar to the Leica DM4 P.

  • Get distinct sample information with 5 objectives on the 5-fold centerable objective revolver
  • Get large overviews from the 22-mm field of view
  • Obtain a better contrast with UC-3D illumination at incident light observation

 

 
 

_dm750p-doubleThe Champion in Education: Leica DM750 P

In education you need a robust tool that students can use every day. You can easily plug and play it – that’s what we call best preconditions for successful learning.

  • Get into the details of your samples with 4 objectives
  • Use the 20-mm field of view for a good overview
  • Enjoy the practical details the instrument offers: You can carry it by its handle and stow away its cable inside the instrument

 

 
 

Do you need the highest degree of automation for fully reproducible image settings and reliable measurements?

_DM4-P_right_01Your choice: Leica DM4 P

Flexible according to your tasks, safe and easy in operation through coded functionalities for research, inexperienced operators, or multiple-user environments

  • Coded 6-fold centerable nosepiece
  • Illumination and contrast management for reproducible results
  • Coded conoscopy with 1.6x magnification changer
  • LED illumination
  • Status display
  • 360° rotating stage with and without 45°click stop
  • Strain-free optics
  • Broad range of polarization equipment
  • Fixed and variable compensators according to DIN 58879

 

 
 

Do you need a flexible and robust system with highest requirements to polarization optics?

_Leica_DM2700_P_03Your choice: Leica DM2700 P

The robust stand and intuitive functionality are the keys to successfully fulfill routine and advanced task on a daily basis.

  • High modularity
  • UC-3D illumination
  • Color-coded diaphragm assistant
  • 5-fold centerable nosepiece
  • 2- or 3-gear focus drive
  • Upper focus stop
  • LED illumination
  • Broad range of conoscopy modules
  • Strain-free optics
  • 360° rotating stage with and without 45°click stop
  • Broad range of polarization equipment
  • Fixed and variable compensators according to DIN 58879

 

 
 

Do you need a professional polarization microscope with a small footprint to teach material and earth sciences in college and university courses?

_Leica_DM750-P2Your choice: Leica DM750 P

It’s practical, flexible, robust and makes learning fun!

  • Integrated handle and cord wrap for easy storage
  • Integrated storage positions for 2 compensators and objective centering tools for easy access
  • Large 178-mm rotating stage for easy viewing of the stage markings
  • Laser-engraved stage markings for long-time use
  • 4 individually centerable objective positions for rotating the specimen on center

 

 
 

Tech Specs

 

  Leica DM4 P Leica DM2700 P Leica DM750 P
Size and weight Dependent on configuration at aproximately 25 kg. Dependent on configuration at aproximately 18 kg. With A/B module = 456 mm height, 220 mm width, 396 mm depth, weight 12 kg
Length: 460 mm (w/o lamphousing), width: 333 mm, height: 480 mm (depending on tube and configuration) Length: 410 mm (with lamphousing), width: 331 mm, height: 505 mm (depending on tube and configuration)
Nosepiece 6x (M25), centerable, encoded 5x (M25), centerable 4x (M25), centerable
Eypieces, usable field of view (FOV) 25 / 22 / 20 mm FOV 22 / 20 mm FOV 20 mm FOV
Illumination incident and transmitted High-power LED High-power LED High-power LED
  Optional: Optional:  
Halogen 12V / 100W Halogen 12V / 100W
External light source for fluorescence excitation Leica EL6000 External light source for fluorescence excitation Leica EL6000
Hg lamphouses (mercury) Hg lamphouses (mercury)
Incident light axis Motorized, 4-fold turret, illumination and contrast manager Manual, 4-fold turret, color-coded diaphragm assistant (CDA) Manual, fixed brightfield beamsplitter
Incident light Polarization contrast Polarization contrast Polarization contrast
Brightfield Brightfield Brightfield
DIC DIC Oblique illumination
Fluorescence Fluorescence  
  UC-3D illumination  
Transmitted light axis Motorized condensor operation, illumination and contrast managment Manual condenser operation with color-coded diaphragm assistant (CDA) Manual condenser operation with color-coded diaphragm assistant (CDA)
Transmitted light Polarization contrast Polarization contrast Polarization contrast
Orthoscopy Orthoscopy Orthoscopy
Conoscopy Conoscopy Conoscopy
Brightfield Brightfield Brightfield
Phase contrast Phase contrast Phase contrast
DIC DIC Darkfield
Darkfield Darkfield  
Stage 360° rotatable polarization stage with verniers and brake 360° rotatable polarization stage with verniers and brake Fixed 360° rotatable polarization stage with verniers and brake
360° rotatable polarization stage with verniers, 45° clickstop position, and brake 360° rotatable polarization stage with verniers, 45° clickstop position and brake
Stage carrier for adaptation of 3rd party stages Stage carrier for adaptation of 3rd party stages
Scanning stage 100×100 Scanning stage 75×50
Scanning stage 75×50 Manual xy stages
Manual xy stages  
Focus drive 25-mm stage stroke of coarse and fine drive 25-mm stage stroke 17-mm stage stroke
45-50-mm total stage stroke depending on stage and condenser type xx-xx mm total stage stroke depending on stage and condenser type
Fine drive: 0.2 mm per turn of the knob (1 scale interval = 2 mm) 2-gear focus drive (coarse / fine) with 1mm scale
Coarse drive: 3.5 mm per turn of the knob 3-gear focus drive (coarse / medium / fine) with 1 and 4 mm scale, torque adjustment, and adjustable upper focus stop
Motorization on request Motorization on request
Conoscopy Fully integrated coded conoscopy module, additional 1.6x magnification changer, user guidance by display feedback Bertrand lens cube Bertrand lens module (AB module)
Advanced conoscopy module (manual) Bertrand lens module (A/B module) A/B module with focusable Bertrand lens
  Advanced conoscopy module (manual)  
Analyzer Fixed analyzer
180° rotatable analyzer
360° rotatable analyzer
Polarizer 360° polarizer for incidend light
360° polarizer for transmitted light
Fixed polarizer with lambda plate
Fixed polarizer with 0°, 45° and 90° positions
90° polarizer with rotatable lambda plate
Polarizer in holder for transmitted light
Compensatores l, l/4, quartz plate (0.-4. Order), tilting compensatores

 

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