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Liquid Pressure Varifocus Lens |
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| Authors: | Ryoichi Kuwano Tsuyoshi Tokunaga Yukitoshi Otani Norihiro Umeda |
| Institution: | (1) Precision Engineering, Chiba Institute of Technology, 2-17-1 Tsudanuma, Narashino, Chiba 275-0016, Japan;(2) Department of Mechanical System Engineering Faculty of Engineering, Tokyo University of Agriculture and Technology, 2-24-16 Nakacho, Koganei, Tokyo 184-8588, Japan |
| Abstract: | A liquid pressure varifocus lens that consists of a thin polymer film and liquid is described. The lens can be continuously changed from a concave to a convex shape by driving the liquid pressure in the lens. The dynamic range of the focal length of the convex lens is from 50 to 250 mm. A beam spot verifies the variable focal function on a photographic film exposed by a He-Ne laser. In addition, the application of the laser for processing is demonstrated to manufacture Fe compressed powder sheets by normal pulse YAG laser. Its melting marks along a focus change are formed with a minimum width of 0.1 mm. |
| Keywords: | varifocus lens liquid pressure focal length polymer film YAG laser processing |
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