ML2870 Halogen Binocular Brightfield/Phase Contrast Biological Microscope

DISCONTINUED ON 10/5/2018The recommended replacement for ML2870 is the MT4210H or MT4210L. A rugged time tested design with true Koehler illumination and high quality optics, suitable for day-to-day use in the laboratory, clinic or classroom. The options below are combined into twelve standard configurations to suit a wide range of biological applications and budgets.

SKU: ml2870_halogen_binocular_bf_pc_biological_microscope Category:

Description

The ML2000 Series features include:

  • Transmitted light Binocular microscope with DIN standard eyepieces with 20mm field of view, 22mm eye relief
  • Binocular head is inclined at 30° degrees and rotatable 360° degrees
  • Dual graduated diopter eyetubes with interpupillary adjustments of 52mm to 72mm
  • Trinocular models has a sliding beam splitter that directs 100% of the light to the eyepieces or 80% to the camera and 20% to the eyepieces
  • Forward facing, quintuple ball bearing smooth operating, revolving nosepiece
  • SM Plan Objectives, 160mm Tube length, Non-Infinity objectives
  • Rectangular attached Mechanical stage with 75mm (X) and 40mm (Y) movement
  • Adjustable slide holder graduations and vernier reading to 0.1mm
  • Achromatic N.A. 1.25 condenser with iris diaphragm and filter carrier
  • Coaxial coarse and fine focus adjustment with graduation, reading 2 microns per division with tension adjustment and safety auto focus stop
  • Built-in Koehler illuminator with 6V 30W halogen lamp & variable intensity control

 

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 ML2200 Series has a Koehler Halogen 6V 30W illumination with forward facing quintuple ball bearing nosepiece. High resolution DIN Standard SM Plan objectives offer crisp, clear, high contrast images and are offered as part of the standard package. A built in integrated Koehler illuminator with a field iris and 6V 30W Halogen lamp and variable intensity control is provided standard equipment to complement the SM PLAN optics. The low voltage, high intensity, pre-centered halogen lamp provides high level illumination can be adjusted to maximize the evenness of the bulb illumination and is readily accessible for a quick bulb replacement. With a rectangular attached mechanical stage.

Additional information

Weight 1.0000 kg
Downloads
Specifications

Model

Head

Illumination

Eyepieces

Condensers

Objectives

Stage

ML2870

Binocular

Koehler 6V 30W halogen

KWH10x FN20

Zernike condenser, NA 1.25 with GIF 546nm, 29.8mm Ø

BF Semi Plan Phase Contrast 10X, S20X, S40X, S100X oil

Flat-Top

ML2970

Trinocular

VIEWING HEADS
Available with standard binocular heads or trinocular heads for photomicrography, 30° inclined eyetubes with adjustable diopter settings and interpupillary distance, 360° rotatable.
 
 
EYEPIECES
Paired DIN KHW10x, FN 20.
 

OBJECTIVE CHANGER
Smooth-operating, ball bearing mounted, quadruple nosepiece.
 
OBJECTIVES
S. Flat Achromats, SM Planachromats, Planachromats, or Phase Contrast.
 
 
STAGE
Attached mechanical stage: 120mm x 140mm surface with 75mm (X) by 40mm (Y) movement, graduated with vernier readings to 0.1 mm, drop-down right or left-handed controls.
Flat-top stage: 171mm x 140mm surface with 80mm (X) by 52mm (Y) movement, graduated with vernier readings to 0.1 mm, detachable specimen guide, drop-down right of left-handed controls.
 

CONDENSERS
Standard models have either an Achromatic NA 1.25 condenser with iris diaphragm and filter tray for brightfield work, simple NA 1.25 slider phase condenser, or an NA 1.25 Zernike phase condenser with filter tray and independently centerable annuli for phase contrast. Cardioid-type NA 1.25 darkfield condenser for high power (100x objective only) darkfield work is optional.
 

ILLUMINATOR
Built-in, 6V 30W, variable-intensity Koehler illumination for apertures up to 1.25.