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US 2022/0178745 A1Published application
Method for restricting laser beams entering an aperture to a chosen dyad and measuring their separation
OwnerRichard Fauconierinventor
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Abstract
One embodiment of a method for restricting laser beams entering an aperture to a chosen dyad and measuring their separation. The method works with frequency-modulated coherent light, and one embodiment uses a moveable, variable-aperture apparatus (FIG. 1) in conjunction with a converging lens (6) and a detector (7). Key elements of other embodiments are described.
Claims3
A method of using a moveable, variable-aperture apparatus in conjunction with a lens and a detector, to admit only two beams from a bundle of multiple parallel beams of frequency-modulated coherent light, comprising:
- a. pre-setting said moveable, variable-aperture apparatus's aperture to the known width of a single beam,
- b. positioning said moveable, variable-aperture apparatus until the light which passes through its aperture is of maximum intensity and zero beat frequency,
- c. leaving said moveable, variable-aperture apparatus in place but opening the aperture to the minimum width with which the light passing through its aperture attains maximum intensity with non-zero beat frequency,
- thereby admitting only two light beams from the bundle.
1 more element
Dependencies are inferred from the claim text.