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Title: Apparatus and method to compensate for refraction of radiation

Abstract

An apparatus to compensate for refraction of radiation passing through a curved wall of an article is provided. The apparatus of a preferred embodiment is particularly advantageous for use in arc tube discharge diagnostics. The apparatus of the preferred embodiment includes means for pre-refracting radiation on a predetermined path by an amount equal and inverse to refraction which occurs when radiation passes through a first wall of the arc tube such that, when the radiation passes through the first wall of the arc tube and into the cavity thereof, the radiation passes through the cavity approximately on the predetermined path; means for releasably holding the article such that the radiation passes through the cavity thereof; and means for post-refracting radiation emerging from a point of the arc tube opposite its point of entry by an amount equal and inverse to refraction which occurs when radiation emerges from the arc tube. In one embodiment the means for pre-refracting radiation includes a first half tube comprising a longitudinally bisected tube obtained from a tube which is approximately identical to the arc tube's cylindrical portion and a first cylindrical lens, the first half tube being mounted with its concave side facing the radiationmore » source and the first cylindrical lens being mounted between the first half tube and the arc tube and the means for post-refracting radiation includes a second half tube comprising a longitudinally bisected tube obtained from a tube which is approximately identical to the arc tube's cylindrical portion and a second cylindrical lens, the second half tube being mounted with its convex side facing the radiation source and the second cylindrical lens being mounted between the arc tube and the second half tube. Methods to compensate for refraction of radiation passing into and out of an arc tube is also provided. 4 figs.« less

Inventors:
;
Issue Date:
Research Org.:
GTE Products Corp
OSTI Identifier:
7018809
Patent Number(s):
4912529 A
Application Number:
PPN: US 7-083744
Assignee:
GTE Products Corp., Danvers, MA (United States)
DOE Contract Number:  
AC03-84SF12235
Resource Type:
Patent
Resource Relation:
Patent File Date: 7 Aug 1987
Country of Publication:
United States
Language:
English
Subject:
42 ENGINEERING; ELECTRIC DISCHARGES; DIAGNOSTIC TECHNIQUES; ELECTROMAGNETIC RADIATION; REFRACTION; ELECTRON TUBES; RADIATIONS; 426000* - Engineering- Components, Electron Devices & Circuits- (1990-)

Citation Formats

Allen, G R, and Moskowitz, P E. Apparatus and method to compensate for refraction of radiation. United States: N. p., 1990. Web.
Allen, G R, & Moskowitz, P E. Apparatus and method to compensate for refraction of radiation. United States.
Allen, G R, and Moskowitz, P E. Tue . "Apparatus and method to compensate for refraction of radiation". United States.
@article{osti_7018809,
title = {Apparatus and method to compensate for refraction of radiation},
author = {Allen, G R and Moskowitz, P E},
abstractNote = {An apparatus to compensate for refraction of radiation passing through a curved wall of an article is provided. The apparatus of a preferred embodiment is particularly advantageous for use in arc tube discharge diagnostics. The apparatus of the preferred embodiment includes means for pre-refracting radiation on a predetermined path by an amount equal and inverse to refraction which occurs when radiation passes through a first wall of the arc tube such that, when the radiation passes through the first wall of the arc tube and into the cavity thereof, the radiation passes through the cavity approximately on the predetermined path; means for releasably holding the article such that the radiation passes through the cavity thereof; and means for post-refracting radiation emerging from a point of the arc tube opposite its point of entry by an amount equal and inverse to refraction which occurs when radiation emerges from the arc tube. In one embodiment the means for pre-refracting radiation includes a first half tube comprising a longitudinally bisected tube obtained from a tube which is approximately identical to the arc tube's cylindrical portion and a first cylindrical lens, the first half tube being mounted with its concave side facing the radiation source and the first cylindrical lens being mounted between the first half tube and the arc tube and the means for post-refracting radiation includes a second half tube comprising a longitudinally bisected tube obtained from a tube which is approximately identical to the arc tube's cylindrical portion and a second cylindrical lens, the second half tube being mounted with its convex side facing the radiation source and the second cylindrical lens being mounted between the arc tube and the second half tube. Methods to compensate for refraction of radiation passing into and out of an arc tube is also provided. 4 figs.},
doi = {},
journal = {},
number = ,
volume = ,
place = {United States},
year = {1990},
month = {3}
}