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Title: Apparatus for monitoring crystal growth

Abstract

A system and method are disclosed for monitoring the growth of a crystalline body from a liquid meniscus in a furnace. The system provides an improved human/machine interface so as to reduce operator stress, strain and fatigue while improving the conditions for observation and control of the growing process. The system comprises suitable optics for forming an image of the meniscus and body wherein the image is anamorphic so that the entire meniscus can be viewed with good resolution in both the width and height dimensions. The system also comprises a video display for displaying the anamorphic image. The video display includes means for enhancing the contrast between any two contrasting points in the image. The video display also comprises a signal averager for averaging the intensity of at least one preselected portions of the image. The value of the average intensity, can in turn be utilized to control the growth of the body. The system and method are also capable of observing and monitoring multiple processes.

Inventors:
 [1]
  1. (Watertown, MA)
Publication Date:
OSTI Identifier:
863931
Patent Number(s):
US 4277441
Assignee:
Mobil Tyco Solar Energy Corporation (Waltham, MA) OSTI
DOE Contract Number:  
NAS7-100
Resource Type:
Patent
Country of Publication:
United States
Language:
English
Subject:
apparatus; monitoring; crystal; growth; method; disclosed; crystalline; liquid; meniscus; furnace; provides; improved; human; machine; interface; reduce; operator; stress; strain; fatigue; improving; conditions; observation; control; growing; process; comprises; suitable; optics; forming; image; anamorphic; entire; viewed; resolution; width; height; dimensions; video; display; displaying; means; enhancing; contrast; contrasting; signal; averager; averaging; intensity; preselected; portions; value; average; utilized; capable; observing; multiple; processes; liquid meniscus; crystal growth; selected portion; video display; selected portions; machine interface; average intensity; reduce operator; monitoring crystal; operator stress; growing process; improved human; preselected portion; /117/348/

Citation Formats

Sachs, Emanual M. Apparatus for monitoring crystal growth. United States: N. p., 1981. Web.
Sachs, Emanual M. Apparatus for monitoring crystal growth. United States.
Sachs, Emanual M. Thu . "Apparatus for monitoring crystal growth". United States. https://www.osti.gov/servlets/purl/863931.
@article{osti_863931,
title = {Apparatus for monitoring crystal growth},
author = {Sachs, Emanual M.},
abstractNote = {A system and method are disclosed for monitoring the growth of a crystalline body from a liquid meniscus in a furnace. The system provides an improved human/machine interface so as to reduce operator stress, strain and fatigue while improving the conditions for observation and control of the growing process. The system comprises suitable optics for forming an image of the meniscus and body wherein the image is anamorphic so that the entire meniscus can be viewed with good resolution in both the width and height dimensions. The system also comprises a video display for displaying the anamorphic image. The video display includes means for enhancing the contrast between any two contrasting points in the image. The video display also comprises a signal averager for averaging the intensity of at least one preselected portions of the image. The value of the average intensity, can in turn be utilized to control the growth of the body. The system and method are also capable of observing and monitoring multiple processes.},
doi = {},
journal = {},
number = ,
volume = ,
place = {United States},
year = {1981},
month = {1}
}

Patent:

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