Image capturing module

• US 10,502,971 B1
• Filed: 04/02/2019
• Issued: 12/10/2019
• Est. Priority Date: 07/03/2018
• Status: Expired due to Fees

• Current Assignee: Gingy Technology Inc.
• Original Assignee: Gingy Technology Inc.
• Inventors: Chung, Chuck, Wu, Jen-Chieh
• Primary Examiner(s): Chen, Chiawei
• Application Number:
  US16/372,440
• Time in Patent Office: 252 Days
• CPC Class Codes: G02B 27/0018 with means for preventing ghost images anti-reflection coatings G02B1/11
• CPC Class Codes: G02B 27/30 Collimators
• CPC Class Codes: G02B 5/003 Light absorbing elements
• CPC Class Codes: G02B 6/08 with fibre bundle in form of plate
• CPC Class Codes: H04N 23/54 Mounting of pick-up tubes, electronic image sensors, deviation or focusing coils
• CPC Class Codes: H04N 23/55 Optical parts specially adapted for electronic image sensors; Mounting thereof

Abstract

An image capturing module includes a cover plate, a sensor, and a light collimator. The light collimator is disposed between the cover plate and the sensor. The light collimator includes a plurality of light collimating units. Each of the light collimating units includes at least one fiber and a plurality of light absorbing columns. The light absorbing columns are disposed parallel to the at least one fiber and surround the at least one fiber. A thickness of the light collimator is T. A distance between two light absorbing columns farthest from each other among the light absorbing columns in each of the light collimating units is D. A numerical aperture of the at least one fiber is NA, NA≤0.7, and D≤T×tan[sin⁻¹(NA)].

Claims

1. An image capturing module, comprising:

a cover plate;

a sensor; and

a light collimator, disposed between the cover plate and the sensor, the light collimator comprising a plurality of light collimating units, each of the light collimating units comprising at least one fiber and a plurality of light absorbing columns, wherein the light absorbing columns are disposed parallel to the at least one fiber and surrounding the at least one fiber, a thickness of the light collimator is T, a distance between two light absorbing columns farthest from each other among the light absorbing columns in each of the light collimating units is D, a numerical aperture of the at least one fiber is NA, NA≤

0.7, and D≤

T×

tan[sin<sup>−

1</sup>(NA)].

2. The image capturing module as claimed in claim 1, wherein any two adjacent light collimating units share at least one light absorbing column.

3. The image capturing module as claimed in claim 1, wherein any two adjacent light collimating units do not share any light absorbing column.

4. The image capturing module as claimed in claim 1, wherein a clad of the at least one fiber comprises a plurality of light absorption particles.

5. The image capturing module as claimed in claim 1, wherein each of the light absorbing columns is a solid light absorbing column body.

6. The image capturing module as claimed in claim 1, wherein each of the light absorbing columns comprises a light absorbing core and a clad encapsulating the light absorbing core, and the clad comprises a plurality of light absorption particles.

7. The image capturing module as claimed in claim 1, wherein extending directions of the at least one fiber and the light absorbing columns are perpendicular to or inclined with respect to the cover plate.

8. The image capturing module as claimed in claim 1, further comprising:

a light source, disposed next to the sensor.

9. The image capturing module as claimed in claim 1, further comprising:

a band pass filter, disposed between the light collimator and the sensor.

10. The image capturing module as claimed in claim 1, further comprising:

a display panel, disposed between the cover plate and the light collimator; and

a band pass filter, disposed between the light collimator and the sensor.

11. The image capturing module as claimed in claim 1, wherein each of the light collimating units comprises a plurality of the fibers surrounded by the light absorbing columns, and the distance between two light absorbing columns farthest from each other among the light absorbing columns in each of the light collimating units is larger than a diameter of each of the fibers.

12. The image capturing module as claimed in claim 1, wherein the light absorbing columns are not located between any two fibers located in the same light collimating unit.

13. An image capturing module, comprising:

a sensor; and

a light collimator, disposed above the sensor, the light collimator comprising a plurality of light collimating units, each of the light collimating units comprising at least one fiber and a plurality of light absorbing columns, wherein the light absorbing columns are disposed parallel to the at least one fiber and surrounding the at least one fiber, a thickness of the light collimator is T, a distance between two light absorbing columns farthest from each other among the light absorbing columns in each of the light collimating units is D, a numerical aperture of the at least one fiber is NA, NA≤

0.7, and D≤

T×

tan[sin<sup>−

1</sup> (NA)], wherein any two adjacent light collimating units share at least one light absorbing column.

14. The image capturing module as claimed in claim 13, wherein a clad of the at least one fiber comprises a plurality of light absorption particles.

15. The image capturing module as claimed in claim 13, wherein each of the light absorbing columns is a solid light absorbing column body.

16. The image capturing module as claimed in claim 13, wherein each of the light absorbing columns comprises a light absorbing core and a clad encapsulating the light absorbing core, and the clad comprises a plurality of light absorption particles.

17. The image capturing module as claimed in claim 13, wherein extending directions of the at least one fiber and the light absorbing columns are perpendicular to or inclined with respect to the sensor.

18. The image capturing module as claimed in claim 13, further comprising:

a band pass filter, disposed between the light collimator and the sensor.

19. The image capturing module as claimed in claim 13, wherein each of the light collimating units comprises a plurality of the fibers surrounded by the light absorbing columns, and the distance between two light absorbing columns farthest from each other among the light absorbing columns in each of the light collimating units is larger than a diameter of each of the fibers.

20. The image capturing module as claimed in claim 19, wherein the light absorbing columns are not located between any two fibers located in the same light collimating unit.