dorsal/arxiv
View SchemaA magnetic liquid deformable mirror for high stroke and low order axially symmetrical aberrations
| Authors | Denis Brousseau, Ermanno F. Borra, Hubert-Jean Ruel, Jocelyn Parent |
|---|---|
| Categories | |
| ArXiv ID | physics/0611160 |
| URL | https://arxiv.org/abs/physics/0611160 |
| DOI | 10.1364/OE.14.011486 |
Abstract
We present a new class of magnetically shaped deformable liquid mirrors made of a magnetic liquid (ferrofluid). Deformable liquid mirrors offer advantages with respect to deformable solid mirrors: large deformations, low costs and the possibility of very large mirrors with added aberration control. They have some disadvantages (e.g. slower response time). We made and tested a deformable mirror, producing axially symmetrical wavefront aberrations by applying electric currents to 5 concentric coils made of copper wire wound on aluminum cylinders. Each of these coils generates a magnetic field which combines to deform the surface of a ferrofluid to the desired shape. We have carried out laboratory tests on a 5 cm diameter prototype mirror and demonstrated defocus as well as Seidel and Zernike spherical aberrations having amplitudes up to 20 microns, which was the limiting measurable amplitude of our equipment
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"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"
},
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