Imaging apparatus and imaging method

• US 10,551,638 B2
• Filed: 12/04/2013
• Issued: 02/04/2020
• Est. Priority Date: 07/31/2013
• Status: Active Grant

• Current Assignee: Beijing Zhigu RUI TUO Tech Company Limited
• Original Assignee: Beijing Zhigu RUI TUO Tech Company Limited
• Inventors: Du, Lin, Zhang, Hongjiang
• Primary Examiner(s): Allen, Stephone B
• Assistant Examiner(s): Abdur, Rahman
• Application Number:
  US14/781,578
• Publication Number:
  US 20160139433A1
• Time in Patent Office: 2,253 Days
• Field of Search: 351158, 351205
• CPC Class Codes: A61B 3/0025 characterised by electronic signal processing, e.g. eye models
• CPC Class Codes: A61B 3/028 for testing visual acuity; for determination of refraction, e.g. phoropters
• CPC Class Codes: A61B 3/103 for determining refraction, e.g. refractometers, skiascopes
• CPC Class Codes: G02B 2027/0127 comprising devices increasing the depth of field
• CPC Class Codes: G02B 2027/014 comprising information/image processing systems
• CPC Class Codes: G02B 2027/0178 Eyeglass type eyeglass details G02C
• CPC Class Codes: G02B 27/017 Head mounted
• CPC Class Codes: G02C 11/10 Electronic devices other than hearing aids
• CPC Class Codes: G02C 7/083 Electrooptic lenses

Abstract

An imaging apparatus includes: an imaging lens module, having an adjustable imaging parameter, and used to image an observed object of an imaging receiver; an information processing module, used to detect a focus position of the imaging receiver, and determine the imaging parameter of the imaging lens module according to the focus position; and a lens adjustment module, used to adjust the imaging lens module according to the determined imaging parameter. Through the apparatus and method of the embodiments of the present invention, a focus position of an imaging receiver is automatically detected and an imaging parameter of an imaging lens module located between the imaging receiver and an object is automatically adjusted according to the focus position, thereby enabling an imaging receiver (for example, a user'"'"'s eyes) to conveniently obtain clear imaging of objects at different distances.

Claims

1. An apparatus, comprising:

a memory, coupled to a processor, that stores executable modules, comprising;

an imaging lens module comprising at least one adjustable imaging parameter, and used to image an observed object of an imaging receiver;

an information processing module used to detect a focus position of the imaging receiver, and determine the at least one adjustable imaging parameter of the imaging lens module according to the focus position; and

a lens adjustment module used to adjust the imaging lens module according to the at least one adjustable imaging parameter,

wherein the information processing module comprises;

a focus position determination unit used to determine an imaging receiver focus position of the imaging receiver according to at least one optical parameter of the imaging receiver,

wherein the focus position determination unit comprises;

a first focus position determination unit used to obtain the imaging receiver focus position of the imaging receiver according to at least one imaging parameter of at least one optical path between an image collection device and the imaging receiver in response to determining a clearest image presented on an imaging plane of the imaging receiver has been collected by the image collection device, wherein the focus position of the imaging receiver comprises a distance between a focal point of the imaging receiver and the imaging receiver, and

wherein the first focus position determination unit comprises;

the image collection device used to collect an image presented on the imaging plane of the imaging receiver,

an adjustable lens unit used to adjust the at least one imaging parameter of the at least one optical path between the imaging receiver and the image collection device to enable the image collection device to obtain the clearest image, and

an image processing apparatus used to process the image obtained by the image collection device, and determine the focus position of the imaging receiver according to the at least one imaging parameter of the at least one optical path between the image collection device and the imaging receiver in response to determining that the image collection device has obtained the clearest image and the at least one optical parameter of the imaging receiver.

2. The apparatus of claim 1, wherein the information processing module comprises:

a refractive examination unit used to determine a corresponding imaging parameter of the at least one adjustable imaging parameter in response to acquisition by the imaging receiver of expected images of objects, comprising the observed object, at a plurality of distances, respectively, and obtain refractive examination information corresponding to the imaging receiver.

3. The apparatus of claim 2, wherein the imaging receiver comprises eyes.

4. The apparatus of claim 2, wherein the at least one optical parameter of the imaging receiver comprises an optical axis direction of the imaging receiver.

5. The apparatus of claim 2, wherein the adjustable lens unit is located on the at least one optical path between the imaging receiver and the image collection device, and has an adjustable focal length at an adjustable position in the at least one optical path.

6. The apparatus of claim 5, wherein the adjustable lens unit is continuously adjustable in real-time.

7. The apparatus of claim 2, further comprising:

a splitter apparatus used to form an optical transfer path between the imaging receiver and the observed object and between the imaging receiver and the image collection device.

8. The apparatus of claim 7, wherein the splitter apparatus comprises:

a curved surface splitter unit used to, in a case that the imaging receiver is an eye, transfer an image presented on an eyeground to the image collection device respectively corresponding to a position of a pupil in response to determining an optical axis direction of the eye has changed.

9. The apparatus of claim 2, wherein the first focus position determination unit further comprises:

a projection device used to project a light spot to the imaging plane of the imaging receiver.

10. The apparatus of claim 9, wherein the projection device comprises:

a projection control module that determines a brightness level of a projected light spot based on the focus position of the imaging receiver as determined by the image processing apparatus.

11. The apparatus of claim 10, wherein the brightness level of the projected light spot is adjustable by the projection control module based on the at least one imaging parameter as determined by the information processing module.

12. The apparatus of claim 1, wherein the focus position determination unit comprises:

a second focus position determination unit used to determine the focus position of the imaging receiver by tracking an optical axis direction of the imaging receiver with an optical axis tracking system and obtaining a scenario depth of a position of the observed object with a depth sensing device.

13. The apparatus of claim 1, wherein the apparatus corresponds to at least two correlated imaging receivers, and the focus position determination unit comprises:

a third focus position determination unit used to obtain the focus position of the imaging receiver by tracking optical axis directions of at least two imaging receivers with an optical axis tracking system and determining an intersection of the optical axis directions of the at least two imaging receivers.

14. The apparatus of claim 1, wherein the information processing module comprises:

an imaging parameter calculation unit used to determine the at least one imaging parameter of the imaging lens module according to the focus position of the imaging receiver and the refractive examination information corresponding to the imaging receiver.

15. The apparatus of claim 1, wherein the information processing module comprises:

a movement gesture analysis processing unit used to determine the at least one imaging parameter of the imaging lens module according to movement gesture information of the apparatus.

16. The apparatus of claim 15, wherein the movement gesture analysis processing unit comprises:

a movement trajectory prediction and adjustment subunit used to predict the at least one imaging parameter corresponding to the imaging lens module at a next moment according to relative movement gesture information of the apparatus and the observed object and the at least one imaging parameter of the imaging lens module at a current moment prior to the next moment.

17. The apparatus of claim 15, wherein the movement gesture analysis processing unit comprises:

a first movement adjustment subunit used to, in response to determining a movement speed of the apparatus has exceeded a set threshold value, adjust the at least one imaging parameter of the imaging lens module to a set common imaging parameter.

18. The apparatus of claim 15, wherein the movement gesture analysis processing unit comprises:

a second movement adjustment subunit used to, in response to determining a movement speed of the apparatus has exceeded a set threshold value, adjust the at least one imaging parameter of the imaging lens module to the at least one imaging parameter of the imaging lens module value at a moment previous to a current moment.

19. The apparatus of claim 15, further comprising:

a movement gesture sensing module used to acquire the movement gesture information of the apparatus.

20. The apparatus of claim 19, wherein the movement gesture information of the apparatus comprises at least one of relative movement gesture information of the apparatus and the observed object or movement speed information of the apparatus.

21. The apparatus of claim 1, wherein the information processing module further comprises:

a history information smoothing unit used to perform smoothing processing of time on a current value of an imaging parameter of the at least one imaging parameter of the imaging lens module according to history information of the imaging parameter of the imaging lens module.

22. The apparatus of claim 1, wherein the imaging lens module comprises at least one lens.

23. The apparatus of claim 1, wherein the imaging parameter of the imaging lens module comprises at least one of a shape and/or a refractive index of the imaging lens module.

24. The apparatus of claim 1, wherein the apparatus is glasses.

25. The apparatus of claim 1, wherein the adjustment to the imaging parameter of the imaging lens module comprises:

adjustment of a curvature of at least one surface of a lens of the imaging lens module to change the focal length of the imaging lens module.

26. The apparatus of claim 1, wherein the adjustment to the imaging parameter of the imaging lens module comprises:

adjustment of a refractive index of at least one surface of a lens of the imaging lens module to change the focal length of the imaging lens module.