Polarizing/Dispersion Microscope ECLIPSE LV100ND POL/DS
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
The cross Nicols, diagonal position
The cross Nicols, extinction position
Extinction angle
Amosite
The parallel Nicols, cleavage face aligned with the crosshair
The cross Nicols, extinction angle measured
Sign of elongation
Amosite Positive: Subtractive diagonal position
Crocidolite Negative: Additive diagonal position
Refractive index (refraction index of the liquid nD=1.605)
Chrysotile and amosite
The upper part of a specimen is focused
The lower part of a specimen is focused
Retardation (optical path difference) for obtaining birefringence magnitude
Amosite
Diagonal position
Subtractive diagonal position confirmed (a test plate is inserted)
Analyzer rotation angle measured (Senarmont compensator is inserted)
Pleochroism
Crosidolite
Parallel to vibration direction of polarizer
Orthogonal to vibration direction of polarizer
Dispersion colors
Chrysotile
nD = 1.550, red-violet to blue
Amosite
nD = 1.680, pink
Crocidolite
nD = 1.680, orange to red ocher