Laser alignment apparatus
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United States of America Patent
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-
Sep 12, 1995
Grant Date -
N/A
app pub date -
Oct 26, 1993
filing date -
Oct 26, 1993
priority date (Note) -
Expired
status (Latency Note)
Importance
Abstract
The apparatus is a laser transmitter and receiver unit with independent adjustment of the focus of each and preservation of precise parallel alignment between the two lines of sight. The transmitter laser and the receiver photodetector are each mounted in a precisely machined two part mounting assembly. The first part of both mounting assemblies includes an objective lens and is fitted against the same precise surface of a reference fixture. The second part of each mounting assembly, holding the laser or photodetector, is connected to the first part by means of precisely mated coaxial sliding cylinders, so that the laser or photodetector can be replaced on the fixture with high accuracy. Axial adjustment of the distance of the laser or photodetector from their respective objective lenses is furnished by spacer washers inserted between the two parts of the assemblies. Thus, once a laser or photodetector is initially aligned relative to a common reference surface, each one can be moved closer to or farther from its respective objective lens without affecting the parallelism of the laser and photodetector lines of sight.
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