Camera module

• US 10,627,606 B2
• Filed: 04/19/2018
• Issued: 04/21/2020
• Est. Priority Date: 11/10/2017
• Status: Active Grant

• Current Assignee: DENSO Corporation
• Original Assignee: DENSO Corporation
• Inventors: Chikata, Kensuke, Kazama, Takeshi, Furutake, Yasuki, Akiba, Kazuyoshi
• Primary Examiner(s): Tra, Tuyen
• Application Number:
  US15/957,032
• Publication Number:
  US 20190146194A1
• Time in Patent Office: 733 Days
• Field of Search: 359745, 359642, 348335
• CPC Class Codes: B60R 11/04 Mounting of cameras operative during drive; Arrangement of controls thereof relative to the vehicle
• CPC Class Codes: B60R 2011/0026 Windows, e.g. windscreen
• CPC Class Codes: B60R 2011/0063 using adhesive means, e.g. hook and loop fasteners
• CPC Class Codes: G02B 13/02 Telephoto objectives, i.e. systems of the type + - in which the distance from the front vertex to the image plane is less than the equivalent focal length
• CPC Class Codes: G02B 13/04 Reversed telephoto objectives
• CPC Class Codes: G02B 13/18 with lenses having one or more non-spherical faces, e.g. for reducing geometrical aberration G02B13/002 takes precedence
• CPC Class Codes: G03B 11/04 Hoods or caps for eliminating unwanted light from lenses, viewfinders or focusing aids
• CPC Class Codes: G03B 17/12 with means for supporting objectives, supplementary lenses, filters, masks, or turrets
• CPC Class Codes: G03B 17/561 Support related camera accessories

Abstract

A camera module, which is mounted on an inside of a front windshield of a vehicle and configured to image an external environment of the vehicle, includes multiple lens units on which an optical image of the external environment is incident, individually, and an imaging system to generate an outside image of the external environment by imaging through each of the lens units, individually.

Claims

1. A camera module configured to be mounted on an inside of a windshield of a vehicle and to image an external environment of the vehicle, the camera module comprising:

a plurality of lens units having optical axes, respectively, wherein the optical axes are shifted from each other, an optical image of the external environment individually enters within angles of view, which are around the optical axes, respectively, the angles of view are different from each other; and

an imaging system to perform imaging individually through the lens units and to generate an outside image of the external environment, wherein

under a definition that a noted set is a set of the lens units in which angles of view overlap with each other, at least two of the lens units, which belong to the noted set, overlap with each other when viewed in a vertical direction of the vehicle,

the optical axes of the at least two of the lens units are shifted from each other in both the vertical direction and a width direction of the vehicle.

2. The camera module according to claim 1, wherein

the optical axes of the lens units, which belong to the noted set, are decentered from each other in the vertical direction of the vehicle.

3. The camera module according to claim 1, wherein

the optical axes of the lens units, which belong to the noted set, are decentered from each other in both the vertical direction and a lateral direction of the vehicle.

4. The camera module according to claim 1, wherein

depths of recognition field of the lens units, which belong to the noted set, overlap with each other.

5. The camera module according to claim 1, wherein

the lens units, which belong to the noted set, include:

a wide angle unit having an angle of view defined with the wide angle lens; and

a narrow angle unit having an angle of view narrower than that of the wide angle unit.

6. The camera module according to claim 5, wherein

the lens unit, which belong to the noted set, further includes:

a telescopic unit having an angle of view narrower than that of the narrow angle unit.

7. The camera module according to claim 1, wherein

the lens units, which belong to the noted set, include:

a wide angle unit having an angle of view defined with the wide angle lens; and

a narrow angle unit having an angle of view narrower than that of the wide angle unit, and

a far point, which defines a depth of recognition field of the wide angle unit, is on a deeper side beyond a near point, which defines a depth of recognition field of the narrow angle unit.

8. The camera module according to claim 1, wherein

angles of view of at least two of the lens units, which belong to the noted set, overlap with each other within a distance of 10 meters from the camera module.

9. The camera module according to claim 1, wherein

a distance of one of the at least two of the lens units from the windshield in a longitudinal direction of the vehicle is different from a distance of an other of the at least two of the lens units from the windshield in the longitudinal direction.

10. The camera module according to claim 1, wherein

the at least two of the lens units overlap with each other when viewed in the vertical direction of the vehicle in a state where the camera module is mounted on the inside of the vehicle.

11. The camera module according to claim 1, further comprising:

a camera casing accommodating the lens units, wherein

the camera casing has a vertical wall portion,

the vertical wall portion has lens windows which penetrate through the vertical wall portion, and

the lens windows expose the at least two lens units, respectively.

12. A camera module configured to be mounted on an inside of a windshield of a vehicle and to image an external environment of the vehicle, the camera module comprising:

a plurality of lens units having optical axes, respectively, wherein the optical axes are shifted from each other, an optical image of the external environment individually enters within angles of view, which are around the optical axes, respectively, the angles of view are different from each other; and

an imaging system to perform imaging individually through the lens units and to generate an outside image of the external environment, wherein

under a definition that a noted set is a set of the lens units in which angles of view overlap with each other, at least two of the lens units, which belong to the noted set, overlap with each other when viewed in a vertical direction of the vehicle, wherein

the lens units, which belong to the noted set, include;

a wide angle unit having an angle of view defined with the wide angle lens; and

a narrow angle unit having an angle of view narrower than that of the wide angle unit,

the windshield is inclined downward toward a deeper side,

the wide angle unit projects toward the deeper side beyond the narrow angle unit, and

the narrow angle unit is on an upper side of the wide angle unit.

13. The camera module according to claim 12, wherein

angles of view of at least two of the lens units, which belong to the noted set, overlap with each other within a distance of 10 meters from the camera module.

14. A camera module configured to be mounted on an inside of a windshield of a vehicle and to image an external environment of the vehicle, the camera module comprising:

a plurality of lens units having optical axes, respectively, wherein the optical axes are shifted from each other, an optical image of the external environment individually enters within angles of view, which are around the optical axes, respectively, the angles of view are different from each other; and

an imaging system to perform imaging individually through the lens units and to generate an outside image of the external environment, wherein

under a definition that a noted set is a set of the lens units in which angles of view overlap with each other, at least two of the lens units, which belong to the noted set, overlap with each other when viewed in a vertical direction of the vehicle, wherein

the lens units, which belong to the noted set, include;

a wide angle unit having an angle of view defined with the wide angle lens;

a narrow angle unit having an angle of view narrower than that of the wide angle unit; and

a telescopic unit having an angle of view narrower than that of the narrow angle unit, and

a far point, which defines a depth of recognition field of the narrow angle unit, is on a deeper side beyond a near point, which defines a depth of recognition field of the telescopic unit.

15. The camera module according to claim 14, wherein

angles of view of at least two of the lens units, which belong to the noted set, overlap with each other within a distance of 10 meters from the camera module.

16. A camera module configured to be mounted on an inside of a windshield of a vehicle and to image an external environment of the vehicle, the camera module comprising:

a plurality of lens units having optical axes, respectively, wherein the optical axes are shifted from each other, an optical image of the external environment individually enters within angles of view, which are around the optical axes, respectively, the angles of view are different from each other; and

an imaging system to perform imaging individually through the lens units and to generate an outside image of the external environment, wherein

under a definition that a noted set is a set of the lens units in which angles of view overlap with each other, at least two of the lens units, which belong to the noted set, overlap with each other when viewed in a vertical direction of the vehicle, wherein

the lens units, which belong to the noted set, include;

a wide angle unit having an angle of view defined with the wide angle lens;

a narrow angle unit having an angle of view narrower than that of the wide angle unit; and

a telescopic unit having an angle of view narrower than that of the narrow angle unit,

the windshield is inclined downward toward a deeper side,

the narrow angle unit projects toward the deeper side beyond the telescopic unit, and

the telescopic unit is on an upper side of the narrow angle unit.

17. The camera module according to claim 16, wherein

angles of view of at least two of the lens units, which belong to the noted set, overlap with each other within a distance of 10 meters from the camera module.

18. A camera module configured to be mounted on an inside of a windshield of a vehicle and to image an external environment of the vehicle, the camera module comprising:

a plurality of lens units having optical axes, respectively, wherein the optical axes are shifted from each other, an optical image of the external environment individually enters within angles of view, which are around the optical axes, respectively, the angles of view are different from each other; and

an imaging system to perform imaging individually through the lens units and to generate an outside image of the external environment, wherein

under a definition that a noted set is a set of the lens units in which angles of view overlap with each other, at least two of the lens units, which belong to the noted set, overlap with each other when viewed in a vertical direction of the vehicle,

the optical axes of the at least two of the lens units are shifted from each other in the vertical direction, and

the optical axes of the at least two of the lens units coincide with each other in a width direction of the vehicle.