Virtual or augmented reality headsets having adjustable interpupillary distance

1. A virtual or augmented reality headset, comprising:

a frame including opposing arm members and a bridge portion positioned intermediate the opposing arm members;

a pair of virtual or augmented reality eyepieces each having an optical center, the pair of virtual or augmented reality eyepieces movably coupled to the frame to enable adjustment of an interpupillary distance between the optical centers; and

an adjustment mechanism coupled to both of the pair of virtual or augmented reality eyepieces and operable to simultaneously move the pair of virtual or augmented reality eyepieces to adjust the interpupillary distance, the adjustment mechanism including a linear actuator physically coupled to the pair of virtual or augmented reality eyepieces by a plurality of links which are arranged such that movement of the linear actuator in a first direction causes the plurality of links to increase the interpupillary distance between the optical centers of the pair of virtual or augmented reality eyepieces and movement of the linear actuator in a second direction opposite the first direction causes the plurality of links to decrease the interpupillary distance between the optical centers of the pair of virtual or augmented reality eyepieces;

wherein the frame includes at least two linear rails on each of the opposing sides of the frame vertically offset from each other to guide a respective one of the virtual or augmented reality eyepieces, and

wherein, for each of the opposing sides of the frame, the at least two linear rails and the arm member form a fork structure.

2. The headset of claim 1 wherein the virtual or augmented reality eyepieces are movable between a narrowest configuration and a widest configuration, and wherein a difference between the interpupillary distance in the widest configuration and the interpupillary distance in the narrowest configuration is between about 20 mm and about 24 mm.

3. The headset of claim 1 wherein the adjustment mechanism is coupled to the bridge portion and the linear actuator includes a user manipulable control for selectively adjusting a position of each of the virtual or augmented reality eyepieces simultaneously.

4. The headset of claim 3 , further comprising:

a selectively removable cover that is selectively positionable to alternatively prevent access to the user manipulable control and to provide access to the user manipulable control by the user.

5. The headset of claim 3 wherein the user manipulable control is constrained to translate back and forth in directions perpendicular to horizontal adjustment directions of the virtual or augmented reality eyepieces.

6. The headset of claim 1 wherein the frame further includes a lock to selectively fix the virtual or augmented reality eyepieces in a selected position.

7. The headset of claim 1 wherein the bridge portion includes a nosepiece to engage a nose of a user and support the virtual or augmented reality eyepieces in front of the user's eyes.

8. The headset of claim 7 wherein the bridge portion further includes a base, and wherein the nosepiece is removably coupleable to the base to selectively lock the virtual or augmented reality eyepieces in a selected position.

9. The headset of claim 7 wherein the bridge portion further includes a base, and wherein the nosepiece is adjustably coupled to the base.

10. The headset of claim 1 , further comprising:

a motor electro-mechanically coupled to the linear actuator; and

an electronic controller electrically coupled to the motor to control movement of the virtual or augmented reality eyepieces via the motor, the linear actuator and the plurality of links.

11. The headset of claim 1 wherein each virtual or augmented reality eyepiece is arcuate and includes a medial end and a lateral end, the medial end positioned proximate the bridge of the frame and the lateral end positioned proximate a temple region of a respective one of the opposing arm members.

12. The headset of claim 11 wherein the frame includes a respective arcuate profile on each of opposing sides of the frame to at least partially nest with a respective one of the virtual or augmented reality eyepieces when the virtual or augmented reality eyepieces are in a narrowest configuration in which the interpupillary distance is at a minimum.

13. The headset of claim 1 wherein, for each of the opposing sides of the frame, the two linear rails are located proximate the bridge portion to guide a medial end of the respective virtual or augmented reality eyepiece and support the respective virtual or augmented reality eyepiece in a cantilevered manner.

14. The headset of claim 1 wherein the fork structure supports the respective one of the virtual or augmented reality eyepieces.

15. A virtual or augmented reality headset, comprising:

a frame including opposing arm members and a bridge positioned intermediate the opposing arm members;

a pair of virtual or augmented reality eyepieces each having an optical center, the pair of virtual or augmented reality eyepieces movably coupled to the frame to enable adjustment of an interpupillary distance between the optical centers; and

an adjustment mechanism coupled to both of the pair of virtual or augmented reality eyepieces and operable to simultaneously move the pair of virtual or augmented reality eyepieces to adjust the interpupillary distance, the adjustment mechanism including a linear actuator physically coupled to the pair of virtual or augmented reality eyepieces by a plurality of links which are arranged such that movement of the linear actuator in a first direction causes the plurality of links to increase the interpupillary distance between the optical centers of the pair of virtual or augmented reality eyepieces and movement of the linear actuator in a second direction opposite the first direction causes the plurality of links to decrease the interpupillary distance between the optical centers of the pair of virtual or augmented reality eyepieces,

wherein the frame includes at least two linear rails on each of the opposing sides of the frame vertically offset from each other to guide a respective one of the virtual or augmented reality eyepieces, and

wherein, for each of the opposing sides of the frame, the two linear rails and a portion of the bridge form a fork structure configured to support the respective one of the virtual or augmented reality eyepieces.