Variable focus lens and spectacles

Variable focus lens by small changes of the equatorial lens...

Variable focus lens with simplified construction using a...

Variable focus liquid filled lens apparatus

Variable focus liquid filled lens mechanism

Variable focus optical system

Variable focus spectacles

Variable geometry optical fiber connection

Variable group delay unit and variable group delay optical...

Variable immersion vignetting display

Variable lead optical tracing machine

Variable lead pattern tracer

Variable light attenuator

Variable light controlling device and variable light...

Variable light transmission device utilizing high...

Variable light transmission factor glizing, electrochromic type

Variable light transmissive electro-optical lenses

Variable magnification lens system

Variable magnification lens system

Variable magnification projection system