DOE Patents title logo U.S. Department of Energy
Office of Scientific and Technical Information

Title: Crystal diffraction lens with variable focal length

Abstract

A method and apparatus for altering the focal length of a focusing element of one of a plurality of pre-determined focal lengths by changing heat transfer within selected portions of the element by controlled quantities is disclosed. Control over heat transfer is accomplished by manipulating one or more of a number of variables, including: the amount of heat or cold applied to surfaces; type of fluids pumped through channels for heating and cooling; temperatures, directions of flow and rates of flow of fluids; and placement of channels. 19 figures.

Inventors:
Issue Date:
OSTI Identifier:
7027747
Patent Number(s):
5004319
Application Number:
PPN: US 7-291916
Assignee:
Dept. of Energy, Washington, DC (United States)
DOE Contract Number:  
W-31109-ENG-38
Resource Type:
Patent
Resource Relation:
Patent File Date: 29 Dec 1988
Country of Publication:
United States
Language:
English
Subject:
42 ENGINEERING; CONTROL SYSTEMS; DESIGN; LENSES; FLUID FLOW; FOCUSING; OPTICAL SYSTEMS; WORKING FLUIDS; FLUIDS; 420000* - Engineering

Citation Formats

Smither, R K. Crystal diffraction lens with variable focal length. United States: N. p., 1991. Web.
Smither, R K. Crystal diffraction lens with variable focal length. United States.
Smither, R K. Tue . "Crystal diffraction lens with variable focal length". United States.
@article{osti_7027747,
title = {Crystal diffraction lens with variable focal length},
author = {Smither, R K},
abstractNote = {A method and apparatus for altering the focal length of a focusing element of one of a plurality of pre-determined focal lengths by changing heat transfer within selected portions of the element by controlled quantities is disclosed. Control over heat transfer is accomplished by manipulating one or more of a number of variables, including: the amount of heat or cold applied to surfaces; type of fluids pumped through channels for heating and cooling; temperatures, directions of flow and rates of flow of fluids; and placement of channels. 19 figures.},
doi = {},
journal = {},
number = ,
volume = ,
place = {United States},
year = {1991},
month = {4}
}

Patent:
Search for the full text at the U.S. Patent and Trademark Office Note: You will be redirected to the USPTO site, which may require a pop-up blocker to be deactivated to view the patent. If so, you will need to manually turn off your browser's pop-up blocker, typically found within the browser settings. (See DOE Patents FAQs for more information.)

Save / Share: