Edmund Optics® (EO) (Barrington, NJ.) offers two liquid-filled lenses from Optotune of Switzerland. The Electrically Focus-Tunable Lenses provide a single-lens tool for focus and zoom objectives. When the user applies a voltage to each plano-convex lens, the lens changes focal length. Each lens is filled with a proprietary optical liquid, and the change in voltage alters the pressure profile of the liquid, resulting in a change in radius of curvature. This electrical manipulation of the radius allows for a focal range of +15 to +100 mm and an aperture of 10 mm. The lenses are available in high refractive index or low dispersion options. Cover glasses for the Electrically Focus-Tunable Lenses are available with either a VIS or NIR coating.

Manually Focus-Tunable Lenses use a rotating outer ring to manipulate their focus length and change the shape of the lens from convex to concave. They also offer a wide focal tuning range of -40 mm to infinity to +40 mm. The lenses, which are available in high refractive or low dispersion options, have an aperture diameter of 20 mm. Cover glasses are available with a VIS coating.

For Free Info Click Here 

Defense Tech Briefs Magazine

This article first appeared in the April, 2011 issue of Defense Tech Briefs Magazine.

Read more articles from this issue here.

Read more articles from the archives here.