US Patent Application 18350133. CONTROL OF VARIABLE-FOCUS LENSES IN A MIXED-REALITY DEVICE FOR PRESBYOPES simplified abstract
Contents
CONTROL OF VARIABLE-FOCUS LENSES IN A MIXED-REALITY DEVICE FOR PRESBYOPES
Organization Name
MICROSOFT TECHNOLOGY LICENSING, LLC
Inventor(s)
Robert Thomas Held of Redmond WA (US)
Bernard Charles Kress of Redmond WA (US)
Ashley Saulsbury of Redmond WA (US)
Dmitry Reshidko of Redmond WA (US)
CONTROL OF VARIABLE-FOCUS LENSES IN A MIXED-REALITY DEVICE FOR PRESBYOPES - A simplified explanation of the abstract
This abstract first appeared for US patent application 18350133 titled 'CONTROL OF VARIABLE-FOCUS LENSES IN A MIXED-REALITY DEVICE FOR PRESBYOPES
Simplified Explanation
- The patent application describes a technology for variable-focus lenses used in a mixed-reality head-mounted display (HMD) device. - The lenses are arranged in a pair, with one lens placed over the eyebox of the see-through optical combiner in the HMD. - The eye-side lens is a negative lens, allowing virtual-world objects to appear close to the user. - To compensate for the negative lens, a real-world-side lens is used as a positive lens to provide a clear view of the real world. - The lens powers are perfectly offset for non-presbyopes (people without age-related vision problems). - For presbyopes (people with age-related vision problems), the lens powers are sometimes mismatched to allow both virtual-world and real-world objects to be seen in sharp focus. - When the user is engaged in close viewing, an eye tracker detects this and adds optical power to the real-world-side lens, making close real-world objects appear farther away and in sharp focus for the presbyopic user.
Original Abstract Submitted
Variable-focus lenses are arranged as a lens pair that work on opposite sides of a see-through optical combiner used in a mixed-reality head-mounted display (HMD) device. An eye-side variable-focus lens is configured as a negative lens over an eyebox of the see-through optical combiner to enable virtual-world objects to be set at a close distance. The negative lens is compensated by its conjugate using a real-world-side variable-focus lens configured as a positive lens to provide an unperturbed see-through experience. For non-presbyopes, the powers of the lenses are perfectly offset. For presbyopes, the lens powers is mismatched at times to provide simultaneous views of both virtual-world and real-world objects on the display in sharp focus. Responsively an eye tracker indicating that the user is engaged in close viewing, optical power is added to the real-world-side lens to push close real-world objects optically farther away into sharp focus for the presbyopic user.
