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Crystal diffraction lens with variable focal length

Patent ·
OSTI ID:867760
 [1]
  1. Hinsdale, IL
+ Show Author Affiliations
A method and apparatus for altering the focal length of a focusing element o one of a plurality of pre-determined focal lengths by changing heat transfer within selected portions of the element by controlled quantities. 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.
Research Organization:
Argonne National Laboratory (ANL), Argonne, IL
DOE Contract Number:
W-31109-ENG-38
Assignee:
United States of America as represented by Department of Energy (Washington, DC)
Patent Number(s):
US 5004319
OSTI ID:
867760
Country of Publication:
United States
Language:
English

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Related Subjects

/359/378/
accomplished
altering
amount
apparatus
applied
changing
changing heat
channels
cold
control
controlled
controlled quantities
cooling
crystal
crystal diffraction
diffraction
directions
element
flow
fluids
focal
focal length
focal lengths
focusing
focusing element
heat
heat transfer
heating
including
length
lengths
lens
manipulating
method
placement
plurality
portions
pre-determined
pumped
quantities
rates
selected
selected portion
selected portions
surfaces
temperatures
transfer
type
variable
variables