Electronic device with a tunable lens having two adjustable surfaces

A system, comprising:

• a head-mounted support structure;
• a display that emits light;
• and
• a lens module supported by the head-mounted support structure that receives the light from the display, wherein the lens module comprises:
• first and second transparent lens elements that define a chamber, wherein the first transparent lens element is an elastomeric lens element and the second transparent lens element is a semi-rigid lens element, wherein the elastomeric lens element is formed from a first material having a Young's modulus of less than 1 GPa, and wherein the semi-rigid lens element is formed from a second material having a Young's modulus that is greater than 1 GPa;
• fluid in the chamber between the first and second transparent lens elements;
• and
• actuators attached to the first transparent lens element that are configured to dynamically adjust curvature of both the first and second transparent lens elements, wherein no actuators are attached to the second transparent lens element.

A system, comprising:

• a head-mounted support structure;
• a display that emits light;
• and
• a lens module supported by the head-mounted support structure that receives the light from the display, wherein the lens module comprises:
• a rigid lens element;
• a first transparent lens element having a lower rigidity than the rigid lens element, wherein the first transparent lens element and the rigid lens element define a first fluid-filled chamber;
• a second transparent lens element having a lower rigidity than the rigid lens element, wherein the second transparent lens element and the rigid lens element define a second fluid-filled chamber and wherein the first transparent lens element is an elastomeric lens element and the second transparent lens element is a semi-rigid lens element;
• a channel between the first fluid-filled chamber and the second fluid-filled chamber;
• a valve in the channel configured to open to allow flow through the channel between the first fluid-filled chamber and the second fluid-filled chamber;
• and
• a plurality of actuators that are configured to move the first transparent lens element and to control flow between the first fluid-filled chamber and the second fluid-filled chamber while the valve is open.