Automatic Focusing Apparatus on a Diffractometer

Focusing Automatic Code Inspections

An automatic focusing algorithm

A simple and effective automatic focusing algorithm is proposed in this article. The principle of the proposed automatic focusing algorithm is based on that, for the radial test pattern, a best-focused image should have the smallest blurred region in the middle of the acquired image, and hence, should have the smallest equivalent radius. The circular Hough transform has became a common method i...

A surveying optical diffractometer.

I N T R O D U C T I O N Optical diffraction and filtering of electron micrographs offers an objective method for analysing periodic structures. Because the preservation of detail in electron micrographs usually is not perfect, many micrographs must be examined and assessed to identify images suitable for analysis. I t is useful to have an instrument that allows one to survey many dozens of elec...

A New Form of Diffractometer

A simple diffractometer is described, in which monochromatic light is focused on a pinhole, rendered parallel, and passed through a film of red cells or other objects the size of which is sought. The diffraction patterns are photographed on special plates, and the positions of the first minimum and of the first maximum are subsequently found by the use of a simplified microphotometer. The metho...

Focusing double bent crystal diffractometer in combination with PSD for SANS experiments

A new concept of medium resolution SANS measurements in a double bent crystal arrangement using fully asymmetric analyzer geometry was suggested earlier. This setup enables a positional analysis of the scattering curve and thus, to collect the whole spectrum simultaneously by a linear position sensitive detector (PSD). It is shown, on the basis of both calculations and Monte Carlo simulations, ...