Apparatus and method for determining optical parameters

Patent metadata

Field	Value
Publication number	US-10520751-B2
Application number	US-201515521476-A
Country	US
Kind code	B2
Filing date	Sep 15, 2015
Priority date	Oct 23, 2014
Publication date	Dec 31, 2019
Grant date	Dec 31, 2019

Abstract

An apparatus for determining optical parameters of a user with spectacles arranged in the use position on the head of the user includes at least one projection device designed and arranged for marking a partial region of the head of the user and/or of the spectacles of the user with a light projection; at least one image recording device designed and arranged for generating image data at least from the marked partial region of the head of the user and/or of the spectacles of the user; and a data processing device with a user data determining device, which is designed to determine user data from the marked partial region of the head and/or of the spectacles on the basis of the generated image data, wherein the user data comprise spatial information in the three-dimensional space of points of the partial region of the head and/or of the spectacles, and a parameter determining device, which is designed to determine optical parameters of the user on the basis of the user data.

First claim

The invention claimed is:

1. An apparatus for determining optical parameters of a user with spectacles arranged in a use position on the head of the user, comprising:
at least one projection device which is designed and arranged to mark a partial region of the head of the user and/or of the spectacles of the user with a light projection;
at least one image recording device which is designed and arranged to generate image data of at least the marked partial region of the head of the user and/or of the spectacles of the user; and
a data processing device, comprising:
a user data determination device which is designed to determine user data of the marked partial region of the head and/or of the spectacles using the generated image data,

wherein the user data include spatial information in three-dimensional space of points of the partial region of the head and/or of the spectacles; and
a parameter determination device which is designed to determine optical parameters of the user using the user data,

wherein the at least one projection device is designed and arranged such that so that predetermined individual points on the head and/or the spectacles of the user are marked in the image data by the light projection, the optical parameters of the user being determined using the predetermined individual points that are marked in the image data.

2. The apparatus according to claim 1 , wherein the at least one projection device is designed and arranged so that, in the image data, the predetermined individual points on the head and/or the spectacles of the user include one or more of:
a pupil center point,
an outer temporal frame point,
an inner nasal frame point,
an inner frame point above the pupil; and
an inner frame point below the pupil.

3. The apparatus according to claim 1 , wherein the at least one projection device is designed and arranged so that the light projection in the image data at least partially has the form of at least one line, at least one line intersection, and/or at least one point.

4. The apparatus according to claim 1 , wherein the at least one projection device is calibrated relative to the at least one image recording device, and the user data determination device uses information about this calibration to determine the user data.

5. The apparatus according to claim 1 , wherein the at least one projection device has an adjustable projection direction.

6. The apparatus according to claim 1 , wherein the at least one projection device is calibrated relative to the at least one image recording device so that the optical axis of the at least one image recording device and the projection plane intersect at an intersection angle of at least 10° and at most 70°, which intersection angle is predetermined.

7. The apparatus according to claim 1 , wherein the light projection provided by the at least one projection device contains at least two projection planes that intersect at a predetermined angle.

8. The apparatus according to claim 1 , wherein the user data determination device is designed and arranged so that it determines the user data from image data that are generated with a single recording of the at least one image recording device.

9. The apparatus according to any claim 1 , wherein the user data determination device is designed and arranged so that it determines the user data from two sets of image data from different recording positions, and uses the line through the light projection to identify corresponding image points in the two sets of image data.

10. The apparatus according to claim 1 , wherein the at least one projection device provides the light projection in an invisible wavelength.

11. The apparatus according to claim 10 , further comprising:
a preview output device that displays on which partial region of the head and/or of the spectacles of the user the invisible light projection is aligned.

12. The apparatus according to claim 1 , wherein the apparatus is designed as a portable, mobile apparatus.

13. A method to determine optical parameters of a user with spectacles arranged in the use position on the head of the user, comprising:
marking a partial region of the head of the user and/or of the spectacles of the user with a light projection,
generating image data of at least the marked partial region of the head of the user and/or of the spectacles of the user,
determining user data of the marked partial region of the head and/or of the spectacles using the generated image data, the user data including spatial information in three-dimensional space of points of the partial region of the head and/or of the spectacles; and
determining optical parameters of the user using the user data,
wherein generating the image data includes marking predetermined individual points on the head and/or the spectacles of the user being marked in the image data by the light projection,
wherein the optical parameters of the user are determined using the predetermined individual points that are marked in the image data.

14. The method according to claim 13 , wherein the user data are determined under consideration of a calibration of the light projection relative to the positioning and alignment of an image recording device to generate the image data.

15. The method according to claim 14 , wherein a distance between the position of the image recording device and the position of the user is estimated from the image data by means of triangulation, taking into account the calibration.

16. The method according to claim 13 , wherein the light projection is adjusted in the generation of the image data so that the projection plane of the light projection travels through both pupils of the user.

17. A non-transitory computer readable medium including instructions that, when executed by one or more processors, cause the one or more processors to determine optical parameters of a user with spectacles arranged in the use position on the head of the user by:
marking a partial region of the head of the user and/or of the spectacles of the user with a light projection;
generating image data of at least the marked partial region of the head of the user and/or of the spectacles of the user;
determining user data of the marked partial region of the head and/or of the spectacles using the generated image data, the user data including spatial information in three-dimensional space of points of the partial region of the head and/or of the spectacles; and
determining optical parameters of the user using the user data,
wherein generating the image data includes marking predetermined individual points on the head and/or the spectacles of the user being marked in the image data by the light projection,
wherein the optical parameters of the user are determined using the predetermined individual points that are marked in the image data.

18. The apparatus according to claim 1 , wherein the projection plane has a direction that is parallel to a line through two pupil center points of the user.

19. The apparatus according to claim 1 , wherein the at least one projection device and the at least one image recording device are disposed apart from one another in a direction that is substantially orthogonal to the projection plane.

20. The apparatus according to claim 1 , wherein the light projection emanating from the at least one projection device in accordance with a projection plane that results in the partial region being marked in the form of a line.

Assignees

• Rodenstock Gmbh

Inventors

• Seitz Peter
• Tiemann Markus
• Esser Gregor
• Mueller Werner

Classifications

• A61B3/112

  for measuring diameter of pupils · CPC title

• A61B3/113

  for determining or recording eye movement · CPC title

• G02C7/027

  considering wearer's parameters · CPC title

• A61B3/08

  for testing binocular or stereoscopic vision, e.g. strabismus · CPC title

• G02C13/005

  Measuring geometric parameters required to locate ophtalmic lenses in spectacles frames (apparatus for testing or instruments for examining the eyes per se A61B3/00; machines or devices and accessories for grinding the edges of lenses using spectacles as a template B24B9/144) · CPC title