Television flaw detector for inspecting the wall surface of a hole through a circuit board

Television flaw detector for inspecting the wall surface of a hole through a circuit board

A television flaw detector, and process, for inspection of the wall surface of a hole through a circuit board. The circuit board is positioned on a support beneath a microscope, with the hole to be inspected aligned with the microscope. On the opposite side of the circuit board are an optical conden...

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Hauptverfasser: MACDONALD, ROBERT W, YATES
Format: Patent
Sprache:eng
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INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIRCHEMICAL OR PHYSICAL PROPERTIES
MEASURING
PHYSICS
TESTING
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creator MACDONALD
ROBERT W
YATES
ROBERT W
description A television flaw detector, and process, for inspection of the wall surface of a hole through a circuit board. The circuit board is positioned on a support beneath a microscope, with the hole to be inspected aligned with the microscope. On the opposite side of the circuit board are an optical condenser and a light source. The condenser directs a divergent conical beam of light into the hole to illuminate the wall surface of the hole about its entire circumference and along its full length. A mask prevents non-reflected light rays from passing directly through the condenser and the hole into the microscope. A television camera mounted on the microscope is connected to a television monitor upon which it produces an image of a region of the wall surface of the hole extending from its full circumference at a selected position along its length.
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subjects INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIRCHEMICAL OR PHYSICAL PROPERTIES
MEASURING
PHYSICS
TESTING
title Television flaw detector for inspecting the wall surface of a hole through a circuit board
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