Fluidic lens with reduced optical aberration

Focal length changeable lens

Focal length changeable lens system

Focal length changeable lens system

Focal length transitional method, auxiliary lens for transiting

Focus adjustable optical system

Focus adjusting apparatus of zoom lens

Focus adjusting apparatus of zoom lens

Focus adjusting mechanism and portable electronic device...

Focus adjustment apparatus

Focus adjustment assemblies for projection television

Focus adjustment method of zoom lens system

Focus corrector for zoom projection lenses used with...

Focus detecting optical system including eccentrically disposed

Focus driving apparatus with impact resistance

Focus error detecting element and optical head using the same

Focus mechanism for varifocal lens

Focus module and method for manufacturing same

Focus servo actuator for moving lens scanners

Focusable front projection lens systems for use with large scree