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Electron Microscopy Sciences

Calibration Standards, Specimens, and Aids

arrow14Diffraction Standards

tdstdsarrow14Camera Length

Diffraction Standards
c4_800Camera Length

The nominal value of the effective camera length of an EM operating in the selected area mode is not sufficiently accurate for any calculations of lattice spacing. The actual value of camera length must be calibrated as the same accelerating voltage and objective lens setting by reference to a known substance with well defined diffraction spacings. The normal specimens are evaporated films on a 3.05 mm grid of aluminum or thallous chloride. The very small crystalline size yields ring patterns suitable for calibration purposes.

80044 Evaporated Aluminum on 3 mm grid each $28.00 Add to Cart
80045 Evaporated Thallous Chloride on 3 mm grid  each 21.00 Add to Cart

Image Rotationmsdstdsarrow14Image Rotation

When changing from a selected area image of a specimen to a diffraction pattern, the strength of the intermediate lens is changed, producing an image rotation between the image and the diffraction pattern. The amount of this rotation can be measured by photographing a crystal whose shape gives a clear indication of orientation. A molybdenum oxide crystal is very suitable for this purpose. Evaporated on a 3.05 mm grid.

80046 Molybdenum Oxide each 21.00 Add to Cart

arrow14Measuring Aids

Ultrastructure Size Calculatorarrow12Ultrastructure Size Calculator

A slide-guide-calculator used to determine the real-life size of a structure from a micrograph- in micrometer, nanometer or angstrom units. It computes the real-life dimension/mm at magnifications from 1,000 to 100,000 by introducing a multiplication factor of x2 or x1/2. The magnification range can be extended.

Waterproof card, printed in English, German and French.

74804 Ultrastructure Size Calculator each 6.00 Add to Cart

Photomicrograph Scale Marker arrow14Photomicrograph Scale Marker

A slide-ruler used to apply scale marks to photomicrographs. There are four scale lines for producing scale marks of 10 microns, 1 micron, 0.1 micron (100 nm) and 10 nm. The scale marker is also used in measuring the real life size of an object in a micrograph. It is made from a clear flexible plastic and it is protected by an enclosed pouch. Instructions are included. Printed in English, German, and French.

74802 Scale Marker each 19.50 Add to Cart

Tip Check and Nioprobe for SPM arrow14