interferogram

[in-ter-feer-uh-gram]
noun Optics.
  1. a photographic record of light interference patterns produced with an interferometer, used for recording shock waves and fluid flow patterns.

Origin of interferogram

First recorded in 1920–25; interfere + -o- + -gram1
Dictionary.com Unabridged Based on the Random House Unabridged Dictionary, © Random House, Inc. 2018