Variable focus liquid lens

Optical: systems and elements – Lens – Fluid

Reexamination Certificate

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Details

C359S676000, C351S154000

Reexamination Certificate

active

07142369

ABSTRACT:
A liquid-filled variable focus lens cell is disclosed. The liquid lens cell consists of four parts: a clear distensible membrane, a transparent wall member, liquid with a fixed volume stored in lens cell chamber, and an annular periphery sealing ring. The inner surfaces of the annular sealing ring are sealed with distensible membrane. The radius of the annular sealing ring is changeable, similar to a conventional iris diaphragm. By tuning the radius of the annular sealing ring, the stored liquid in the lens cell will be redistributed, thus change the curvature of the distensible membrane. Therefore, the liquid lens cell can cause light to converge or diverge. The liquid filled lens can be operated mechanically or automatically.

REFERENCES:
patent: 5138494 (1992-08-01), Kurtin
patent: 5526067 (1996-06-01), Cronin et al.
patent: 5684637 (1997-11-01), Floyd
patent: 5999328 (1999-12-01), Kurtin et al.
patent: 6040947 (2000-03-01), Kurtin et al.
patent: 6369954 (2002-04-01), Berge et al.
patent: 6493151 (2002-12-01), Schachar
patent: 6665127 (2003-12-01), Bao et al.
patent: 6715876 (2004-04-01), Floyd
patent: 19710668 (1998-09-01), None

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