MEASURING METHOD OF LIGHT SPOT POSITION

PURPOSE:To measure a light spot position with high precision without increasing the resolution of a TV camera by converting a light spot from a position to be measured into plural streaky linear images through a cross filter attached to the lens of the TV camera and measuring the light spot position...

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Bibliographic Details
Main Authors MAEKAWA TOSHIYA, AOKI AKIO
Format Patent
LanguageEnglish
Published 31.10.1985
Edition4
Subjects
MEASURING
MEASURING ANGLES
MEASURING AREAS
MEASURING IRREGULARITIES OF SURFACES OR CONTOURS
MEASURING LENGTH, THICKNESS OR SIMILAR LINEARDIMENSIONS
PHYSICS
TESTING
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Summary:PURPOSE:To measure a light spot position with high precision without increasing the resolution of a TV camera by converting a light spot from a position to be measured into plural streaky linear images through a cross filter attached to the lens of the TV camera and measuring the light spot position. CONSTITUTION:A light emitting body 1 which indicates the light spot of a target whose position is to be measured uses a halogen lamp, sodium lamp, etc., and an image of this light emitting body 1 is picked up by the TV camera 2. The cross filter (cross screen) 3 is attached to the lens of the TV camera 2. A cross mark is projected on the image pickup surface of a solid-state image pickup element through the filter. The video signal from the TV camera 2 is impressed to a video processor 5 and an image frozen there is supplied to a computer 6 and converted into a binary signal, so that the cross mark is extracted from the background.
Bibliography:Application Number: JP19840072984