Optical microscopy
-
Upload
elisabeth-newton -
Category
Documents
-
view
47 -
download
1
description
Transcript of Optical microscopy
Optical microscopy
We want to see more details Magnification
Resolution
Contrast
Simple microscope
MENA3100, 22/1-07, OBK
The simple microscope
Antony van Leeuwenhoek
(1632−1723)
The compound microscopeca. 1595 Hans Janssen
Robert Hook(1635−1703)
Micrographia, 1664
Stereo microscope
Compound microscope for transmitted light
Inverted compound microscopefor reflected light
Refraction
Kromatisk abberation
Spherical abberation
Corrections The objective
Numerical aperture (NA)
NA = nsin
R = 0,61/NAResolution Rayleigh criterion (Raleigh in Brandon and Kaplan)
The limiting factor: Diffraction
Oil immersion
NA = nsin
Condenser system
EyepiceOcular (okular)
More is needed than just the objective
Optical anisotropy
Calcite
Amorphous and cubic: Optically isotropic, one refracive indexHexagonal, trigonal, tetragonal: Optically anisotropic, two refractive indicesLower symmetry: Optically anisotropic, three refractive indices
Optically active crystals in the microscope
Optically active crystals in the microscope
Michel-Levy chart
Remember that geologists often call their book on microscopy on thin sections foroptical crystallography, and microscopy with reflected light is ore microscopy (malmmikroskopi).
Some web sites:http://www.olympusmicro.com/primer/http://www.microscopyu.com/http://www.micro.magnet.fsu.edu/http://www.micro.magnet.fsu.edu/primer/pdfs/basicsandbeyond.pdfmaintenance:http://www.zeiss.de/C1256D18002CC306/0/1205E8CBD68054EAC125701500404705/$file/46-0009_e.pdf