Ultralow Power On-the-Eye Vergence and Distance Sensing Through Differential Magnetometry | IEEE Journals & Magazine | IEEE Xplore

Ultralow Power On-the-Eye Vergence and Distance Sensing Through Differential Magnetometry


Ultra-low energy, on-the-eye vergence-type distance ranger based on sensing of a locally uniform vector field, specifically the earth's magnetic field is demonstrated in ...

Abstract:

We demonstrate the realization of a very low energy, on-the-eye vergence-type distance ranger based on sensing of a locally uniform vector field, specifically the earth’s...Show More

Abstract:

We demonstrate the realization of a very low energy, on-the-eye vergence-type distance ranger based on sensing of a locally uniform vector field, specifically the earth’s magnetic field. This ranging method is passive, only requiring measurement of the magnetic field vector at both eyeballs utilizing magnetometer chips placed on the eye scleral regions. The eye vergence angle and range distance are calculated from these two vector quantities. The method can obtain a range reading with as little as 118 nJ of energy consumed per eye for 3.3V and 50 nJ when operated at 1.9V. This method is thus suitable for applications where energy storage is very limited such as in smart contacts vision correcting microsystems.
Ultra-low energy, on-the-eye vergence-type distance ranger based on sensing of a locally uniform vector field, specifically the earth's magnetic field is demonstrated in ...
Published in: IEEE Access ( Volume: 11)
Page(s): 28596 - 28609
Date of Publication: 17 March 2023
Electronic ISSN: 2169-3536

Funding Agency:


References

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