Correlating a pair of patterns

An optical emission pattern representing a first binary function is produced by a liquid crystal dot matrix display device 10a illuminated by a source 38. The pattern is controlled by the output of CCD imager 22 viewing an electron microscope image 19. A second LCD 10b operating as an image pattern...

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Bibliographische Detailangaben
1. Verfasser:	WALTER HOPPE
Format:	Patent
Sprache:	eng
Schlagworte:	BASIC ELECTRIC ELEMENTS DEVICES OR ARRANGEMENTS, THE OPTICAL OPERATION OF WHICH ISMODIFIED BY CHANGING THE OPTICAL PROPERTIES OF THE MEDIUM OF THEDEVICES OR ARRANGEMENTS FOR THE CONTROL OF THE INTENSITY,COLOUR, PHASE, POLARISATION OR DIRECTION OF LIGHT, e.g.SWITCHING, GATING, MODULATING OR DEMODULATING ELECTRIC DISCHARGE TUBES OR DISCHARGE LAMPS ELECTRICITY FREQUENCY-CHANGING NON-LINEAR OPTICS OPTICAL ANALOGUE/DIGITAL CONVERTERS OPTICAL ELEMENTS, SYSTEMS, OR APPARATUS OPTICAL LOGIC ELEMENTS OPTICS PHYSICS TECHNIQUES OR PROCEDURES FOR THE OPERATION THEREOF
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Beschreibung
Zusammenfassung:	An optical emission pattern representing a first binary function is produced by a liquid crystal dot matrix display device 10a illuminated by a source 38. The pattern is controlled by the output of CCD imager 22 viewing an electron microscope image 19. A second LCD 10b operating as an image pattern radiation relay stores a single frame from the CCD imager 22 as a reference image. The functions represented by the images on the LCDs 10a and 10b are superimposed and viewed by a transducer 44 which may be a CCD imager or a camera tube and generates a signal representing a convolution product of the two functions. This signal can be used to control the object position in the electron microscope 16.