Speckle reduction device and compact, portable phoropter module
Publication Date: 2014-Apr-30
The IP.com Prior Art Database
The present technical disclosure describes an optical device for reducing speckle noise of laser light and a compact portable phoropter module. The laser speckle reduction device is based on a reluctance force based actuator which moves an optical element such as a diffusor. By combining various adaptive optics building blocks, compact portable ophthalmic instruments can be built. The combination of an electrically tunable lens with two rotating cylinder lenses enables compact phoropters and allows correcting spherical error and astigmatism. Optionally a tunable prism can be added.