Optics: measuring and testing – By configuration comparison – With photosensitive film or plate
Patent
1986-09-12
1988-06-28
Church, Craig E.
Optics: measuring and testing
By configuration comparison
With photosensitive film or plate
250560, 250341, 250349, 2503581, 356385, G01B 1102
Patent
active
047535326
ABSTRACT:
The disclosure relates to an apparatus for determining the dimensions of an object at linearly spaced locations on the object comprising, a measurement station in which a linear measurement between opposing edges of the object may be made, means to move the object through the measuring station with the dimensions to be measured extending transversely to said path, a light source on one side of the measurement station to direct a beam of light through the measurement station transversely to the path of movement of the object to span the dimension of the object to be measured. Two elongate photo-electric array means one arranged on the opposite side of the object to receive images of the respective edges of the object to produce signals from which the dimension between said edges may be calculated and two lens means are provided to focus images of opposing edges of the object illuminated by the light source on to said two photo-electric array means respectively. Two separate mounting means for the two lens means and array means are provided, each mounting means with the elongate array means extending parallel to each other and means are provided for adjusting the mounting means carrying said array means to cater for different object sizes and means responsive to the images formed on the two photo-electric array means to determine the dimensions between said opposing edges of the object.
REFERENCES:
patent: 3734620 (1973-05-01), Cade
patent: 3737237 (1973-06-01), Zurasky
patent: 4061427 (1977-12-01), Fletcher et al.
patent: 4068955 (1978-01-01), Bodlaj
Church Craig E.
Freeman John C.
Tesa Metrology Limited
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