Lens loosening test device and lens loosening test method

1 . A lens loosening test device configured to detect whether a lens to be tested is loose or not, comprising a frame, a testing mechanism fixed on the frame, and a testing picture card fixed on the frame and adjacent to the testing mechanism, wherein:

the testing mechanism includes a base fixed to the frame, a rotating drive component fixed to the base, a rotating bracket connected to and driven by the rotating drive component to rotate, a knocking component fixed to the rotating bracket, an imaging component fixed to the rotating bracket, and a fixing component fixed to the rotating bracket, wherein the knocking component and the fixing component are arranged adjacent to the imaging component, the fixing component is configured to fix the lens to be tested to enable the lens to be tested to be arranged at top of the imaging component, the knocking component is configured to knock the lens to be tested, and the imaging component is configured to capture an image of the testing picture card by the lens to be tested and determine whether the lens to be tested is loose or not based on the image;

wherein the knocking component comprises a first fixing frame fixed on the rotating bracket, a knocking cylinder fixed on the first fixing frame, and a knocking portion connected to the knocking cylinder and driven by the knocking cylinder, wherein the knocking cylinder is configured to drive the knocking portion to knock the lens to be tested.

2 . The lens loosening test device according to claim 1 , wherein the fixing component comprises a second fixing frame fixed on the rotating bracket, a clamping cylinder fixed on the second fixing frame, and a clamping portion connected to the clamping cylinder and driven by the clamping cylinder, wherein the clamping cylinder is configured to drive the clamping portion to clamp the lens to be tested.

3 . A lens loosening test method, wherein a lens to be tested is tested by a lens loosening test device according to claim 2 , and the lens loosening test method comprises:

placing the lens to be tested on an imaging component, and fixing, by a fixing component, the lens to be tested;

capturing, by the imaging component, a first image of a testing picture card, and calculating a first spatial frequency response (SFR) value based on the first image;

knocking, by a knocking component, the lens to be tested;

capturing, by the imaging component, a second image of the testing picture card, and calculating a second SFR value based on the second image;

driving, by a rotating drive component, a rotating bracket, the knocking component, the imaging component, and the fixing component installed on the rotating bracket to rotate to a predetermined position;

knocking, by the knocking component, the lens to be tested, and driving, by the rotating drive component, the rotating bracket, the knocking component, the imaging component, and the fixing component installed on the rotating bracket to return;

capturing, by the imaging component, a third image of the testing picture card, and calculating a third SFR value based on the third image; and

determining whether the lens to be tested is loose or not based on the first SFR value, the second SFR value, and the third SFR value.

4 . The lens loosening test device according to claim 1 , wherein the imaging component comprises an adjusting component fixed to the rotating bracket and a sensor component fixed on top of the adjusting component, wherein the adjusting component is configured to adjust a position of the sensor component.

5 . The lens loosening test device according to claim 4 , wherein the adjusting component comprises a horizontal adjusting component fixed on the rotating bracket and a vertical adjusting component fixed on the horizontal adjusting component, wherein the sensor component is fixed on top of the vertical adjusting component, and the vertical adjusting component is configured to adjust the position of the sensor component along a vertical direction, and the horizontal adjusting component is configured to adjust a position of the vertical adjusting component to adjust the position of the sensor component along a horizontal direction.

6 . A lens loosening test method, wherein a lens to be tested is tested by a lens loosening test device according to claim 5 , and the lens loosening test method comprises:

placing the lens to be tested on an imaging component, and fixing, by a fixing component, the lens to be tested;

capturing, by the imaging component, a first image of a testing picture card, and calculating a first spatial frequency response (SFR) value based on the first image;

knocking, by a knocking component, the lens to be tested;

capturing, by the imaging component, a second image of the testing picture card, and calculating a second SFR value based on the second image;

driving, by a rotating drive component, a rotating bracket, the knocking component, the imaging component, and the fixing component installed on the rotating bracket to rotate to a predetermined position;

knocking, by the knocking component, the lens to be tested, and driving, by the rotating drive component, the rotating bracket, the knocking component, the imaging component, and the fixing component installed on the rotating bracket to return;

capturing, by the imaging component, a third image of the testing picture card, and calculating a third SFR value based on the third image; and

determining whether the lens to be tested is loose or not based on the first SFR value, the second SFR value, and the third SFR value.

7 . A lens loosening test method, wherein a lens to be tested is tested by a lens loosening test device according to claim 4 , and the lens loosening test method comprises:

placing the lens to be tested on an imaging component, and fixing, by a fixing component, the lens to be tested;

capturing, by the imaging component, a first image of a testing picture card, and calculating a first spatial frequency response (SFR) value based on the first image;

knocking, by a knocking component, the lens to be tested;

capturing, by the imaging component, a second image of the testing picture card, and calculating a second SFR value based on the second image;

driving, by a rotating drive component, a rotating bracket, the knocking component, the imaging component, and the fixing component installed on the rotating bracket to rotate to a predetermined position;

knocking, by the knocking component, the lens to be tested, and driving, by the rotating drive component, the rotating bracket, the knocking component, the imaging component, and the fixing component installed on the rotating bracket to return;

capturing, by the imaging component, a third image of the testing picture card, and calculating a third SFR value based on the third image; and

determining whether the lens to be tested is loose or not based on the first SFR value, the second SFR value, and the third SFR value.

8 . The lens loosening test device according to claim 1 , wherein there are a plurality of testing picture cards, and the imaging component is configured to capture images of the plurality of testing picture cards by the lens to be tested.

9 . A lens loosening test method, wherein a lens to be tested is tested by a lens loosening test device according to claim 8 , and the lens loosening test method comprises:

placing the lens to be tested on an imaging component, and fixing, by a fixing component, the lens to be tested;

capturing, by the imaging component, a first image of a testing picture card, and calculating a first spatial frequency response (SFR) value based on the first image;

knocking, by a knocking component, the lens to be tested;

capturing, by the imaging component, a second image of the testing picture card, and calculating a second SFR value based on the second image;

driving, by a rotating drive component, a rotating bracket, the knocking component, the imaging component, and the fixing component installed on the rotating bracket to rotate to a predetermined position;

knocking, by the knocking component, the lens to be tested, and driving, by the rotating drive component, the rotating bracket, the knocking component, the imaging component, and the fixing component installed on the rotating bracket to return;

capturing, by the imaging component, a third image of the testing picture card, and calculating a third SFR value based on the third image; and

determining whether the lens to be tested is loose or not based on the first SFR value, the second SFR value, and the third SFR value.

10 . The lens loosening test device according to claim 1 , wherein there are 5 testing picture cards, in which 4 testing picture cards are arranged on four sides of the testing mechanism, respectively, and 1 testing picture card is arranged directly above the testing mechanism.

11 . A lens loosening test method, wherein a lens to be tested is tested by a lens loosening test device according to claim 10 , and the lens loosening test method comprises:

placing the lens to be tested on an imaging component, and fixing, by a fixing component, the lens to be tested;

capturing, by the imaging component, a first image of a testing picture card, and calculating a first spatial frequency response (SFR) value based on the first image;

knocking, by a knocking component, the lens to be tested;

capturing, by the imaging component, a second image of the testing picture card, and calculating a second SFR value based on the second image;

driving, by a rotating drive component, a rotating bracket, the knocking component, the imaging component, and the fixing component installed on the rotating bracket to rotate to a predetermined position;

knocking, by the knocking component, the lens to be tested, and driving, by the rotating drive component, the rotating bracket, the knocking component, the imaging component, and the fixing component installed on the rotating bracket to return;

capturing, by the imaging component, a third image of the testing picture card, and calculating a third SFR value based on the third image; and

determining whether the lens to be tested is loose or not based on the first SFR value, the second SFR value, and the third SFR value.

12 . A lens loosening test method, wherein a lens to be tested is tested by a lens loosening test device according to claim 1 , and the lens loosening test method comprises:

placing the lens to be tested on an imaging component, and fixing, by a fixing component, the lens to be tested;

capturing, by the imaging component, a first image of a testing picture card, and calculating a first spatial frequency response (SFR) value based on the first image;

knocking, by a knocking component, the lens to be tested;

capturing, by the imaging component, a second image of the testing picture card, and calculating a second SFR value based on the second image;

driving, by a rotating drive component, a rotating bracket, to drive the knocking component, the imaging component, and the fixing component installed on the rotating bracket to rotate to a predetermined position;

knocking, by the knocking component, the lens to be tested, and driving, by the rotating drive component, the rotating bracket, the knocking component, the imaging component, and the fixing component installed on the rotating bracket to return;

capturing, by the imaging component, a third image of the testing picture card, and calculating a third SFR value based on the third image; and

determining whether the lens to be tested is loose or not based on the first SFR value, the second SFR value, and the third SFR value.

13 . The lens loosening test method according to claim 12 , wherein determining whether the lens to be tested is loose or not based on the first SFR value, the second SFR value, and the third SFR value comprises:

calculating a first difference between the first SFR value and the second SFR value;

calculating a second difference between the first SFR value and the third SFR value;

determining whether the first difference and the second difference are both less than a preset threshold; and

in response to the first difference and the second difference not being both less than the preset threshold, determining that the lens to be tested is loose.

14 . The lens loosening test method according to claim 12 , wherein driving, by the rotating drive component, the rotating bracket, the knocking component, the imaging component, and the fixing component installed on the rotating bracket to rotate to the predetermined position comprises:

driving, by the rotating drive component, the rotating bracket, the knocking component, the imaging component, and the fixing component installed on the rotating bracket to rotate 180 degrees to the predetermined position, at which the rotating bracket is horizontally downward.

15 . A lens loosening test method, wherein a lens to be tested is tested by a lens loosening test device according to claim 1 , and the lens loosening test method comprises: placing the lens to be tested on an imaging component, and fixing, by a fixing component, the lens to be tested; capturing, by the imaging component, a first image of a testing picture card, and calculating a first spatial frequency response (SFR) value based on the first image; knocking, by a knocking component, the lens to be tested; capturing, by the imaging component, a second image of the testing picture card, and calculating a second SFR value based on the second image; driving, by a rotating drive component, a rotating bracket, the knocking component, the imaging component, and the fixing component installed on the rotating bracket to rotate to a predetermined position; knocking, by the knocking component, the lens to be tested, and driving, by the rotating drive component, the rotating bracket, the knocking component, the imaging component, and the fixing component installed on the rotating bracket to return; capturing, by the imaging component, a third image of the testing picture card, and calculating a third SFR value based on the third image; and determining whether the lens to be tested is loose or not based on the first SFR value, the second SFR value, and the third SFR value.