Head mounted display device

• US 20080239523A1
• Filed: 03/07/2008
• Published: 10/02/2008
• Est. Priority Date: 03/29/2007
• Status: Active Grant

• Current Assignee: Microoled Bht
• Original Assignee: Carl Zeiss AG (Carl-Zeiss-Stiftung)
• Inventors: Beck, Klaus, Rudolph, Gunter
• Granted Patent: US 7,633,683 B2
• Time in Patent Office: Days
• US Class Current: 359/823
• CPC Class Codes: G02B 2027/011 comprising device for correcting geometrical aberrations, distortion
• CPC Class Codes: G02B 27/0172 characterised by optical features
• CPC Class Codes: G02B 27/0176 characterised by mechanical features

Abstract

An HMD device has an imaging optic for the right eye and an imaging optic for the left eye. Each imaging optic so images an image, which is generated in the object plane, that the image can be observed by a user in an image plane and each of the imaging optics includes an optical element (23) and a deflecting element (25) mounted downstream of the optical element (23). An image transducer (24) and the optical element (23), which follows the image transducer (24), are held by a linearly guided receptacle frame (15) moveable via a drive unit. A linear movement in the direction of an optical axis takes place. Adjusting wheels (4, 5) are mounted on respective sides of the image window for the right and left eyes. Each of the adjusting wheels (4, 5) is coupled mechanically to a corresponding cam curve. Each cam curve translates a rotational movement of the adjusting wheel (4, 5) into an output end linear movement of the receptacle frame (15).

Claims

1. An HMD device comprising:

first and second imaging optical systems for the left and right eyes of a user wearing said device;

a support frame defining first and second windows corresponding to respective ones of said first and second imaging optical systems for the left and right eyes of said user, respectively;

each one of said imaging optical assemblies being adapted to so image an image formed in an object plane to permit said user to observe said image in an image plane with the eye corresponding thereto;

each of said imaging optical systems including an optical element defining an optical axis and a deflecting element disposed downstream of said optical element;

each one of said imaging optical systems further including an image transducer mounted upstream of said optical element and a receptacle frame for holding said image transducer and said optical element;

said receptacle frame being linearly movably guided;

each one of said imaging optical systems further including a drive unit for driving said receptacle frame so as to cause said optical element to be displaced along said optical axis;

the drive units of said first and second imaging optical systems including respective adjusting wheels disposed next to corresponding ones of said first and second windows as viewed from said user; and

,

each of said drive units further including a cam mechanism for coupling the adjusting wheel to the receptacle frame so as to translate an input rotational movement of the adjusting wheel into an output linear movement of the receptacle frame.

2. The HMD device of claim 1, wherein each of said cam mechanisms includes a slotted cam formed on the adjusting wheel corresponding thereto and a cam follower in engagement with said slotted cam;

and, the cam follower is connected to the receptacle frame to impart said output linear movement thereto.