Patent ID: 11966042
Assignee: ADLENS LTD
Field: Optics (Instruments)
Classification: CPC G | IPC G

Claim 24:
25. The augmented reality display unit as claimed in claim 24, wherein the adjustment mechanism comprises a reciprocally moveable cam plate having one or more first cam surfaces arranged to engage one or more respective cam follower members at one or more of the actuation points on the membrane holding structure of the front compression liquid lens assembly, and one or more second cam surfaces arranged to engage one or more respective cam follower members at one or more of the actuation points on the membrane holding structure of the rear compression liquid lens assembly; the one or more first cam surfaces and one or more second cam surfaces being configured such that movement of the cam plate causes simultaneous displacement of the membrane holding structures of the front and rear compression liquid lens assemblies at their respective actuation points towards or away from their respective second walls parallel to the optical axis in a mutually inverse manner, such that as the absolute focusing power of one of the compression liquid lens assemblies is increased the absolute focusing power of the other compression liquid lens assembly is decreased and vice versa.