{
  "annotation_id": "61670d97-5e6a-4152-980a-fb551ba283eb",
  "date_created": "2026-03-02T18:01:14.201000Z",
  "date_modified": "2026-03-02T18:01:14.201000Z",
  "file_hash": "7d0b081264997e7a0b251572fb15a583dd5260fb2b5688317c1ca1792958283d",
  "private": false,
  "record": {
    "abstract": "We present a new class of magnetically shaped deformable liquid mirrors made\nof a magnetic liquid (ferrofluid). Deformable liquid mirrors offer advantages\nwith respect to deformable solid mirrors: large deformations, low costs and the\npossibility of very large mirrors with added aberration control. They have some\ndisadvantages (e.g. slower response time). We made and tested a deformable\nmirror, producing axially symmetrical wavefront aberrations by applying\nelectric currents to 5 concentric coils made of copper wire wound on aluminum\ncylinders. Each of these coils generates a magnetic field which combines to\ndeform the surface of a ferrofluid to the desired shape. We have carried out\nlaboratory tests on a 5 cm diameter prototype mirror and demonstrated defocus\nas well as Seidel and Zernike spherical aberrations having amplitudes up to 20\nmicrons, which was the limiting measurable amplitude of our equipment",
    "arxiv_id": "physics/0611160",
    "authors": [
      "Denis Brousseau",
      "Ermanno F. Borra",
      "Hubert-Jean Ruel",
      "Jocelyn Parent"
    ],
    "categories": [
      "physics.optics",
      "astro-ph",
      "physics.gen-ph"
    ],
    "doi": "10.1364/OE.14.011486",
    "title": "A magnetic liquid deformable mirror for high stroke and low order   axially symmetrical aberrations",
    "url": "https://arxiv.org/abs/physics/0611160"
  },
  "schema_id": "dorsal/arxiv",
  "source": {
    "execution_id": "b5e277d4-b4f8-46ab-a679-4be0f77add69",
    "id": "arXiv Dataset IDs",
    "type": "Model",
    "variant": "snapshot-2026-03-01",
    "version": "0.1.0"
  },
  "user_id": 1000002
}