Focal point detecting optical apparatus

Focus detecting device

Focus error detecting device and optical pickup device...

Global radius of curvature estimation and control system for...

Image focussing mechanism

In Vitro evaluation of animal or human lens characteristics

Instrument for optically measuring soft contact lens parameters

Lens inspection method and apparatus

Lens meter

Lens meter

Lens meter

Lens meter and method of measurement of progressive multifocal l

Lens meter having a focusing indication system with divided-imag

Lens meter with target orthogonalizer

Lens meter without relatively moving optical parts

Method and apparatus for determining the optical properties of a

Method and apparatus for locally measuring refractive...

Method and apparatus for measuring soft contact lenses

Method and apparatus for testing the power of a lens

Method and apparatus or in vitro evalution of focal length and f