| 摘要 |
PROBLEM TO BE SOLVED: To provide a multi-element lens systems which is simple and inexpensive and has durability. SOLUTION: The lens system includes a glass microsphere (105) bonded to a planar surface of a glass hemisphere (205). In preferred lens systems, the thickness of the glass hemisphere (205) is selected to form an image plane for transmitted light that is tangent to the surface of the microsphere (105). Accordingly, in digital cameras fabricated with such lens systems, the glass microsphere (105) can be attached directly to a digital image-capturing device (110). These preferred lens systems require no focusing adjustment and are suitable for applications requiring a wide field of view. COPYRIGHT: (C)2009,JPO&INPIT
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