Optical attenuator molding method
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United States of America Patent
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-
Nov 9, 2004
Issued Date -
N/A
app pub date -
Oct 1, 2002
filing date -
Apr 18, 2001
priority date (Note) -
Expired
status (Latency Note)
Importance
Abstract
A method for molding an optical attenuator having a unitary lens portion and supporting portion includes the steps of: providing a mold having cavity and core elements which together define a space in which the optical attenuator can be molded including a movable core pin having a proximal end defining a surface of the lens portion, and a core pin motor coupled to the core pin for adjusting the thickness of the lens portion; injecting a suitable polymer into the space to form the optical attenuator; separating the cavity and core elements to extract the optical attenuator from the mold; optically measuring the thickness of the lens portion; and providing a signal indicative of the thickness of the lens to a controller having an output coupled to the core pin motor, the controller providing a signal to the core pin motor specifying any movement necessary to retain the thickness of the lens portion within a desired range before repeating the injecting step.
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