초록 ▼

An apparatus and method are disclosed wherein a linear array of electromagnetic radiation emitting devices are arranged in association with a moving workpiece. Electromagnetic radiation emitted by the array is received by two or more receivers. Several non-contact measurements may be obtained on a w

An apparatus and method are disclosed wherein a linear array of electromagnetic radiation emitting devices are arranged in association with a moving workpiece. Electromagnetic radiation emitted by the array is received by two or more receivers. Several non-contact measurements may be obtained on a workpiece using the present apparatus and methods.

대표청구항 ▼

[What is claimed is:] [1.]at least two discrete electromagnetic radiation emitting devices, said devices located a distance from a first surface of a material workpiece, and extending partially outwardly from an edge of said workpiece, each of said devices being responsive to the application of curr

[What is claimed is:] [1.]at least two discrete electromagnetic radiation emitting devices, said devices located a distance from a first surface of a material workpiece, and extending partially outwardly from an edge of said workpiece, each of said devices being responsive to the application of current thereto to emit radiation;a first receiver responsive to radiation emitting from said devices, said first receiver located at a stand-off distance from a second surface of said material;a second receiver responsive to radiation emitting from said devices and located a stand-off distance from said second surface of said workpiece;a drive circuit for applying said current to said discrete radiation emitting devices for sequentially actuating each of said emitting devices; anda processor for receiving first receiver signals from said first receiver and for receiving second receiver signals from said second receiver.