@misc{indiciaeb5af0cdad0b1,
  title = {A phase-stepped point diffraction interferometer using liquid crystals},
  author = {Mercer, Carolyn R. and Creath, Katherine and Rashidnia, Nasser},
  year = {1995},
  url = {https://ntrs.nasa.gov/citations/19950021616},
  note = {Source identifier: 19950021616}
}