Tunable Flat Alvarez Optics
- Active layer: photo-patterned liquid crystal polymer films
- Thickness: defined by supporting substrate (2 or 4) plus active layers ~10μm
a) Cylindrical lens
Tunable cylindrical lens is made of a pair of photo-patterned 1D Alvarez components coated with liquid crystal polymer. Lateral shift between components leads to lens focus tuning in a wide range.
Increasing shift between Alvarez components
Figure 1. Photos (between crossed polarizers) of a pair of 1D Alvarez components with increasing shift between Alvarez components.
Figure 2. (a) The dependence of focal distance of flat cylindrical Alvarez lens on the shift between 1D Alvarez components. (b) Focusing at 400mm (upper photo) and at infinity (lower photo) after pair of 1D Alvarez components with 2mm shift or 0mm.
b) Spherical lens
Tunable spherical lens is made of a pair of photo-patterned 2D Alvarez components coated with liquid crystal polymer. Shift between components provides lens focus change in a wide range.
Figure 3. The dependence of focal distance (a) and optical power (b) of flat spherical Alvarez lens on the shift between 2D Alvarez components.
Figure 4. Focusing and defocusing of the 2D spherical Alvarez lens: (a) raw collimated laser beams 633nm and 543nm. (b) focusing (400mm) of RHCP beam by spherical Alvarez lens (8mm shift between components). (c) defocusing of LHCP beam by spherical Alvarez lens.
BEAM Co.,
Tel. (407) 734-5222
Fax (407) 969-0477
e-mail: sales@beamco.com, info@beamco.com.
http://www.beamco.com/
1300 Lee Road
, Orlando
, FL
,
32810
, USA
Tel. (407) 734-5222
Fax (407) 969-0477
e-mail: sales@beamco.com, info@beamco.com.
http://www.beamco.com/