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Compact optical design solutions using focus tunable lenses

2011; SPIE; Volume: 8167; Linguagem: Inglês

10.1117/12.897608

1996-756X

M. Blum, M. Büeler, Chauncey Grätzel, Manuel Aschwanden,

Photonic and Optical Devices

Several approaches have been demonstrated to build focus tunable lenses. The additional degree of freedom enables the design of elegant, compact optical systems, typically with less mechanics. We present a new range of electrically and mechanically focus tunable lenses of different sizes and tuning ranges and discuss their characteristics. We show how tunable lenses can be used to improve optical design for auto-focus and zoom in terms of size, quality and speed. Furthermore, we present an LED-based spot light with variable illumination angle, which shows optimal performance in terms of spot quality and optical efficiency.