Method of determining a correcting optical function to a virtual image

Patent metadata

Field	Value
Publication number	US-10852549-B2
Application number	US-201716330221-A
Country	US
Kind code	B2
Filing date	Sep 12, 2017
Priority date	Sep 19, 2016
Publication date	Dec 1, 2020
Grant date	Dec 1, 2020

Abstract

A method implemented by computer device of determining a correcting optical function to be applied on a virtual image to be displayed to a user of an optical system including an optical lens to be placed in front of a user eye and including a back face having an optical design; a see-through displaying device configured to display the virtual image towards the eye, the virtual image being transmitted at least through the back face of the optical lens defining a display area on the back face; the method includes a step, during which optical design data relating to the optical design of the back face of the optical lens are provided; a display area data providing step, during which display area data relative to at least one parameter of the display area are provided; and a correcting optical function determining step, during which a correcting optical function is determined based at least on the optical design data and on the display area data.

First claim

The invention claimed is:

1. A method implemented by computer means of determining a correcting optical function to be applied on a virtual image to be displayed to a user of an optical system comprising at least:
an optical lens designed to be placed in front of an eye of the user and comprising at least a back face having an optical design;
a see-through displaying device designed and configured to display the virtual image towards the eye of the user, the virtual image being transmitted at least through the back face of the optical lens defining a display area on the back face;
wherein the method comprises:
an optical design data providing step, during which optical design data relating to the optical design of the back face of the optical lens are provided;
a display area data providing step, during which display area data relative to at least one parameter of the display area are provided; and
a correcting optical function determining step, during which a correcting optical function is determined based at least on the optical design data and on the display area data.

2. The method according to claim 1 , wherein:
the optical lens further comprises a front face opposed to the back face and having another optical design;
the virtual image is further transmitted through the front face of the optical lens;
during the optical design data providing step, optical design data relating to the optical design of the front face of the optical lens is further provided; and
the correcting optical function is further determined based on the optical design data relating to the optical design of the front face of the optical lens.

3. The method according to claim 1 , wherein the front and the back faces are designed and arranged so as to form an ophthalmic lens adapted to the user's prescription.

4. The method according to claim 3 , wherein the ophthalmic lens is a progressive optical lens and/or a multifocal optical lens.

5. The method according to claim 1 , wherein the at least one parameter of the display area comprises the relative position of the display area with respect to at least the back face and/or the relative angular extent of the display area with respect to at least the back face and/or the projection distance of the virtual image.

6. A method for providing an optical system adapted to a user, the optical system comprising at least an optical lens and a see-through displaying device, the method comprises at least:
an optical lens providing step, during which the optical lens is provided, the optical lens being designed to be placed in front of an eye of the user and comprising at least a back face having an optical design;
a see-through displaying device providing step; during which a see-through displaying device is provided, the see-through displaying device being designed and configured to display the virtual image towards the eye of the user, the virtual image being transmitted at least through the back face of the optical lens defining a display area on the back face;
a correcting optical function determining step, during which a correcting optical function to be applied on a virtual image to be displayed to the user of the optical system is determined according to claim 1 ;
an optical system adjusting step, during which the optical system is adjusted based on the determined correcting optical function.

7. The method according to claim 6 , wherein the optical system adjusting step comprises an optical device providing step, during which an optical device is provided, the optical device being designed to be placed such that the virtual image is further transmitted through the optical device and the optical device having an optical function based on the determined correcting optical function.

8. The method according to claim 6 , wherein the optical system adjusting step comprises a virtual source image processing step, during which a virtual source image from which the virtual image is displayed is processed based on the determined correcting optical function.

9. A correction determining component for determining a correcting optical function to be applied on a virtual image to be displayed to a user of an optical system comprising at least:
an optical lens designed to be placed in front of an eye of the user and comprising at least a back face having an optical design;
a see-through displaying device designed and configured to display the virtual image towards the eye of the user, the virtual image being transmitted at least through the back face of the optical lens defining a display area on the back face;
the correction determining component comprising:
a memory configured to store computer executable instructions, and a processor for executing the computer executable instructions stored in the memory, wherein the computer executable instructions comprise instructions for:
providing optical design data relating to the optical design of the back face of the optical lens,
providing display area data relative to at least one parameter of the display area, and
determining a correcting optical function based at least on the optical design data and on the display area data.

10. The correction determining component according to claim 9 , wherein the optical lens further comprises a front face opposed to the back face and having another optical design and the virtual image is further transmitted through the front face of the optical lens; and wherein the computer executable instructions further comprise one of the following instructions for:
providing optical design data relating to the optical design of the front face of the optical lens, and
determining the correcting optical function based on the optical design data relating to the optical design of the front face of the optical lens.

11. An optical system adapted to a user comprising:
an optical lens designed to be placed in front of an eye of the user and comprising at least a back face having an optical design;
a see-through displaying device designed and configured to display a virtual image towards the eye of the user, the virtual image being transmitted at least through the back face of the optical lens defining a display area on the back face;
a correction determining component configured to determine a correcting optical function to be applied on a virtual image to be displayed to a user by the see-through displaying device according to claim 1 ; and
an optical system adjusting component configured to adjust the optical system based on the determined correcting optical function.

12. The optical system according to claim 11 , wherein the optical system adjusting component comprises an optical device designed to be placed such that the virtual image is further transmitted through the optical device and the optical device having an optical function based on the determined correcting optical function.

13. The optical system according to claim 11 , wherein the optical system adjusting component comprises:
a memory configured to store computer executable instructions, and
a processor for executing the computer executable instructions stored in the memory, wherein the computer executable instructions comprise instructions for processing a virtual source image from which the virtual image is displayed, based on the determined correcting optical function.

14. A head mounted device configured to be worn by a user, comprising an optical system adapted to the user according to claim 11 .

15. The method according to claim 7 , wherein the optical function corresponds to a function providing for each gaze direction an effect of the optic

Assignees

• Essilor Int

Inventors

• Rousseau Denis
• Callier Benoit
• Swital Marion

Classifications

• G02C7/086

  Auxiliary lenses located directly on a main spectacle lens or in the immediate vicinity of main spectacles · CPC title

• G02B2027/0185

  Displaying image at variable distance · CPC title

• G02B2027/0178

  Eyeglass type (eyeglass details G02C) · CPC title

• G02B27/0172 Primary

  characterised by optical features · CPC title

• G02B30/00

  Optical systems or apparatus for producing three-dimensional [3D] effects, e.g. stereoscopic images (in microscopes G02B21/22) · CPC title