Polarizing/Dispersion Microscope

ECLIPSE LV100ND POL/DS

  1. Key Features
  2. Specifications/Dimensions

Microscopes for dispersion staining observation allowing qualitative analysis and identification of asbestos

Polarizing microscopes can measure the properties of asbestos, such as refractive indices, birefringence, retardation, extinction angles, pleochroism and signs of elongation, helping in the identification of asbestos. LV100ND POL/DS is a high-performance, polarizing microscope with accessories that enable dispersion staining observation of up to 400x.
  • The LV100ND POL/DS employs optics with high extinction factors, facilitating detection and observation of high-precision optical properties.
  • The LV100ND POL/DS enables analysis of birefringence, extinction angles, signs of elongation, refractive indices, birefringence magnitudes and pleochroism of asbestos.
  • Changing the objectives and PH modules allows observation of asbestos dispersion colors corresponding to the refractive indices of the immersion liquid. The LV100ND POL/DS enables both quantitative analysis and dispersion staining observation of asbestos.
  • A fully rotatable circular graduated stage offers trouble-free sample rotation and accurate analysis during polarization observation.

Birefringence

Mixture of rock wool and chrysotile

[fig.]
The cross Nicols, diagonal position
[fig.]
The cross Nicols, extinction position

Extinction angle

Amosite

[fig.]
The parallel Nicols, cleavage face aligned with the crosshair
[fig.]
The cross Nicols, extinction angle measured

Sign of elongation

[fig.]
Amosite Positive: Subtractive diagonal position
[fig.]
Crocidolite Negative: Additive diagonal position

Refractive index (refraction index of the liquid nD=1.605)

Chrysotile and amosite

[fig.]
The upper part of a specimen is focused
[fig.]
The lower part of a specimen is focused

Retardation (optical path difference) for obtaining birefringence magnitude

Amosite

[fig.]
Diagonal position
[fig.]
Subtractive diagonal position confirmed (a test plate is inserted)
[fig.]
Analyzer rotation angle measured (Senarmont compensator is inserted)

Pleochroism

Crosidolite

[fig.]
Parallel to vibration direction of polarizer
[fig.]
Orthogonal to vibration direction of polarizer

Dispersion colors

[fig.]
Chrysotile
nD = 1.550, red-violet to blue
[fig.]
Amosite
nD = 1.680, pink
[fig.]
Crocidolite
nD = 1.680, orange to red ocher

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