@misc{indiciae4913737a4a4c,
  title = {Optical detector for objects within an adjustable range.},
  author = {J C Bliss and H D Crane},
  year = {1964},
  doi = {10.1364/josa.54.001261},
  url = {https://pubmed.ncbi.nlm.nih.gov/5867970/},
  note = {Source identifier: 5867970}
}