METHOD FOR DETERMINING THE SHARPNESS OF A FIXED-FOCUS CAMERA, TEST DEVICE FOR TESTING THE SHARPNESS OF A FIXED-FOCUS CAMERA, FIXED-FOCUS CAMERA AS WELL AS METHOD FOR ASSEMBLING A FIXED-FOCUS CAMERA
First Claim
1. A method for determining a sharpness of a fixed-focus camera, the method comprising:
- capturing a first image of an object by the camera;
determining a sharpness of the first image;
introducing first optical element, separate from the camera, into an optical path of the camera;
capturing a second image of the object;
determining a sharpness of the second image; and
,identifying presence of an imaging error of the camera depending on a comparison of the sharpness of the first and second images.
1 Assignment
0 Petitions
Accused Products
Abstract
The invention relates to a method for determining the validity of a measured sharpness of a fixed-focus camera (8), in which a first image of an object (13) is captured by the camera (8) and the sharpness of the image is determined, wherein an additional first optical element (15, 15′) is introduced into the optical path of the camera (8) and a second image of the object (13) is captured and the sharpness of the second image is determined, wherein depending on the comparison of the sharpnesses of at least the two images, the presence of an imaging error of the camera (8) is identified. The invention also relates to a device for testing the sharpness of a fixed-focus camera, a fixed-focus camera as well as the use of a test device for a fixed-focus camera in a vehicle and a method for assembling a fixed-focus camera.
-
Citations
15 Claims
-
1. A method for determining a sharpness of a fixed-focus camera, the method comprising:
-
capturing a first image of an object by the camera; determining a sharpness of the first image; introducing first optical element, separate from the camera, into an optical path of the camera; capturing a second image of the object; determining a sharpness of the second image; and
,identifying presence of an imaging error of the camera depending on a comparison of the sharpness of the first and second images. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10)
-
-
11. A test device for testing a sharpness of a fixed-focus camera, the camera comprising a camera lens, an image capturing unit, and at least one optical element separate from the camera and positioned in an optical path of the camera on a side of the camera lens facing away from the image capturing unit, the test device comprising:
an evaluating unit, wherein a first image of an object is captured by the camera without the at least one optical element and a second image of the object is captured by the camera with the at least one optical element, and the evaluating unit is is configured to determine;
a sharpness of the first and second images, and presence of an imaging error of the camera depending on a comparison of the sharpness of the first and second images.
-
12. A fixed-focus camera mountable on or in a motor vehicle for environmental detection of the motor vehicle, comprising:
-
a camera lens; and an image capturing unit spaced from the camera lens, wherein, upon assembly of the camera, a distance between said camera lens and said image capturing unit is adjusted such that a sharpness of the camera deviates in a defined manner from a sharpness required in at least one operational phase in the field of the camera with respect to temperature conditions, upon assembly, and wherein, due to temperature conditions existing in the at least one operational phase, the distance automatically varies such that a sharpness of the camera is within a tolerance interval of a sharpness maximum.
-
-
13. A method for assembling a fixed-focus camera, comprising:
adjusting, upon assembly of camera components, a distance between a camera lens and an image capturing unit such that a sharpness of the camera deviates in a defined manner from a sharpness required in at least one operational phase in the field of the camera with respect to temperature conditions, upon assembly, and due to temperature conditions existing in the at least one operational phase the distance automatically varies such that a sharpness of the camera is within a tolerance interval of a sharpness maximum. - View Dependent Claims (14, 15)
Specification