CN111614950A

CN111614950A - Lens detection device

Info

Publication number: CN111614950A
Application number: CN201910133744.3A
Authority: CN
Inventors: 许玄岳; 赵元庆
Original assignee: HPB Optoelectronics Sz Co ltd
Current assignee: HPB Optoelectronics Sz Co ltd
Priority date: 2019-02-22
Filing date: 2019-02-22
Publication date: 2020-09-01
Anticipated expiration: 2039-02-22
Also published as: CN111614950B

Abstract

The invention discloses a lens detection device, which comprises a base and an optical detection module, wherein the optical detection module is arranged on one side of the base and is not contacted with the base; the optical detection module comprises: the system comprises a light source, a detection image, an image capturing unit and a comparison unit, wherein the light source generates at least one light ray, the light ray penetrates through the lens to be detected and irradiates on the detection image, and the image capturing unit captures an image of the detection image and generates a detection image; the comparison unit compares the difference between the detection image and a standard image to judge the yield of the lens to be detected, thereby avoiding the damage of the vibration module to the image acquisition unit and other components.

Description

Lens detection device

Technical Field

The invention relates to a lens detection device, in particular to a device for detecting vibration of a lens by using an optical detection module.

Background

In the field of lens assembly, the assembly procedure of a general lens is to sequentially assemble a plurality of lenses into a lens barrel, and glue is often used for fixing the lenses at predetermined positions of the lens barrel; however, due to various limitations such as the barrel-shaped structure of the lens barrel itself, the lens cannot be fixed in the lens barrel by glue, so the lens is prone to have defects such as lens shift or loose after being subjected to a vibration test, and further causes the optical axis shift; the problem of detecting the looseness of the lens in the current optical factory is that the detection action is carried out after the whole lens is assembled, so that whether the optical axis of the lens is loosened due to vibration cannot be effectively detected in real time; therefore, the optical axis deviation problem caused by poor lens quality will eventually cause the whole set of cameras to be scrapped, and the assembly and manufacturing cost is increased virtually.

In view of the above, one of the present inventors is to solve the above problems in the patent of "integrated vibration detection method and device thereof" I554749, No. 8/6/2014 in taiwan, the integrated vibration detection device mainly comprises a detection fixture and a comparison unit arranged on a vibrator, wherein the detection fixture comprises a lens fixing module for fixing a lens to be detected; the detection graph is arranged on one side of the lens to be detected and is provided with more than one detection graph; the image forming unit is arranged on one side of the lens to be detected, which is opposite to the detection image, and is used for sensing the light reflected by the detection image and forming a detection image; when light rays penetrate through the lens to be detected and irradiate the detection image, the detection image reflects the light rays to the image forming unit to form an image, and the comparison unit compares the image of the detection image so as to detect whether the optical axis of the lens deviates due to vibration or not in real time; however, the vibration detection described in this patent is mainly a destructive detection method, although the vibration detection can increase the detection rate of the unsurpassed lens, and is also easy to damage other detection components, such as the image forming unit, etc., since the cost of the original is expensive, how to effectively avoid the above-mentioned disadvantages of the prior art, and indeed achieve the purpose of saving the lens detection cost and achieving the nondestructive lens detection, the related industry developers and related researchers such as the lens detection system, etc., still need to continuously try to overcome and solve the problems.

Disclosure of Invention

The present invention is directed to a lens inspection apparatus, which can avoid the problem of damage to an image capturing unit caused by vibration of a vibrating machine.

In order to achieve the above object, the present invention discloses a lens inspection apparatus, which comprises a base, a vibration module disposed on the base, and a fixing module disposed on the base and fixing a lens to be inspected; an optical detection module disposed on one side of the base and not contacting the base, wherein the optical detection module comprises: the light source is arranged on one side of the lens to be detected and generates at least one light ray which passes through the lens to be detected; the detection graph is arranged on the outer side of the lens to be detected relative to the light source, and the light rays irradiate on the detection graph; the image acquisition unit is arranged relative to the detection image, acquires the image of the detection image and generates a detection image; a comparison unit electrically connected with the image capture unit; the comparison unit compares the difference between the detection image and a standard image to judge the yield of the lens to be detected.

In an embodiment of the present invention, it is further disclosed that the optical detection module further includes a suspension module, and the optical detection module is suspended on the suspension module.

In an embodiment of the present invention, it is also disclosed that the vibration module includes a vibration unit, and the vibration unit drives the fixed module to vibrate.

In an embodiment of the present invention, it is also disclosed that the vibration module drives the fixed module to vibrate in a multi-axial manner.

In an embodiment of the present invention, it is also disclosed that the vibration module vibrates in a frequency conversion manner.

In an embodiment of the present invention, it is also disclosed that the optical detection module further includes a display unit, and the display unit is electrically connected to the comparison unit.

In an embodiment of the present invention, it is further disclosed that the display unit further includes an electrically linked processing module, an algorithm is disposed in the processing module for comparing a difference between the detected image and the standard image, and when the difference exceeds a threshold, the processing module sends a signal.

In an embodiment of the present invention, it is also disclosed that the optical detection module further includes an alarm unit, and the alarm unit is electrically connected to the comparison unit.

In an embodiment of the present invention, it is also disclosed that the detection graph includes a feature pattern.

In an embodiment of the present invention, it is also disclosed that the feature pattern includes a cross mark or a resolution pattern.

Drawings

FIG. 1: which is a front view of a preferred embodiment of the present invention;

FIG. 2: which is a top view of a preferred embodiment of the present invention;

FIG. 3: it is a first detection diagram of a preferred embodiment of the present invention;

FIG. 4: it is the second detection diagram of a preferred embodiment of the present invention;

FIG. 5: it is a schematic circuit connection diagram of a preferred embodiment of the present invention; and

FIG. 6: which is a frequency conversion diagram of a preferred embodiment of the present invention.

[ brief description of the drawings ]

10 base

20 vibration module

30 lens to be tested

32 fixed module

40 optical detection module

42 light source

44 detection map

442 cross plot

444 resolution graphics

46 image capturing unit

462 detecting the image

48 alignment unit

482 display unit

483 processing module

484 alarm unit

50 suspension module

60 frequency conversion type vibration module

Detailed Description

In order to provide a further understanding and appreciation for the structural features and advantages achieved by the present invention, the following detailed description of the presently preferred embodiments is provided:

the invention is developed aiming at the lens detection device in the prior art, and solves the problem that the image capturing unit is damaged due to the vibration of the vibration machine in the prior art.

First, please refer to fig. 1 and fig. 2, which are a front view and a top view of a preferred embodiment of the present invention. The lens detection device comprises a base 10, wherein a vibration module 20 is arranged on the base 10, a vibration unit is arranged in the vibration module 20 and used for generating vibration, and the vibration module 20 is used for driving the base 10 to vibrate; a fixed module 32 is disposed on the base 10, and the vibration module 20 vibrates and drives the fixed module 32 to vibrate, wherein the vibration module 20 is a vibration mode with a multi-axial mode M to drive the base 10 to vibrate, thereby driving the fixed module 32 to vibrate; the fixed module 32 is provided with a lens 30 to be tested, wherein a plurality of lenses are disposed inside the lens 30 to be tested, and for convenience of detection, the lenses are disposed perpendicular to the base 10.

Referring to fig. 1 and fig. 2, as shown in the drawings, the lens inspection apparatus of the present invention further includes an optical inspection module 40, the optical inspection module 40 is disposed at one side of the base 10, in order to avoid affecting components of the optical inspection module 40 when the base 10 vibrates, the optical inspection module 40 does not contact with the base 10, specifically, the optical inspection module 40 can be suspended above the base 10, and the components of the optical inspection module 40 are respectively disposed at two sides of the lens 30 to be inspected; the components of the optical detection module 40 can also be separately supported on two sides of the base 10, and the main purpose is not to contact with the base 10, so that the structure can avoid the damage of the optical detection module 40. In the present embodiment, the optical detection module 40 is suspended above the base 10, a suspension module 50 is disposed above the base 10, and the components of the optical detection module 40 are respectively suspended on the suspension module 50.

The optical detection module 40 includes a light source 42 and a detection map 44, the light source 42 is suspended at one side of the lens 30 to be detected, the light source 42 generates at least one light ray, the light ray passes through the lens 30 to be detected, the detection map 44 is suspended at the outer side of the lens 30 to be detected relative to the light source 42, and the light ray passes through the lens 30 to be detected and then irradiates the detection map 44. The optical inspection module 40 further includes an image capturing unit 46, the image capturing unit 46 is hung on the hanging module 50 relative to the inspection chart 44, the image capturing unit 46 is used for capturing the image of the inspection chart 44 and generating an inspection image, wherein the image capturing unit 46 is a Charge Coupled Device (CCD) or a Complementary Metal Oxide Semiconductor (CMOS), etc. The optical inspection module 40 further includes a comparison unit 48, the comparison unit 48 is electrically connected to the image capturing unit 46, the comparison unit 48 is configured to receive the inspection image generated by the image capturing unit 46, and the comparison unit 48 determines the yield of the lens 30 by comparing the difference between the inspection image and a standard image.

In this embodiment, please refer to fig. 5, which is a schematic circuit connection diagram according to a preferred embodiment of the present invention, the optical detection module 40 further includes a display unit 482, the display unit 482 is electrically connected to the comparison unit 48, the display unit 482 is used for displaying the comparison data of the comparison unit 48, the display unit 482 is electrically connected to a processing module 483, the processing module 483 compares a difference value between the detected image and the standard image, and the processing module 483 sends a signal when the difference value exceeds a threshold value. The optical detection module 40 further includes an alarm unit 484, the alarm unit 484 is electrically connected to the comparison unit 48, and the alarm unit 484 is used to issue an alarm.

Referring to fig. 6, fig. 6 is a schematic diagram of variable frequency vibration according to a preferred embodiment of the invention, wherein the difference between fig. 6 and fig. 1 is that the vibration module 20 is a vibration mode employing a multi-axial mode M, the variable frequency vibration module 60 is a vibration mode employing a variable frequency mode F, that is, the vibration module 20 generates a plurality of reciprocating displacements of vibration in a plurality of axial directions, and the variable frequency vibration module 60 tests the lens 30 to be tested in a single test for a plurality of vibration frequencies, for example, a vibration frequency change from 1 hertz (Hz) to 1 megahertz (MHz).

In the actual inspection process, the light generated by the light source 42 passes through the lens 30 to be inspected and then irradiates the inspection image 44, and the inspection image 44 includes a feature pattern. Referring to fig. 3 and 4, as shown, the feature pattern may be a cross plot 442 or a resolution plot 444. After the light irradiates the inspection chart 44, the image capturing device 46 captures the image of the inspection chart 44 and generates the inspection image, and then the image capturing device 46 transmits the inspection image to the comparison unit 48, the comparison unit 48 receives the detected image, compares the detected image with a standard image, and then, the processing module 483 compares the difference between the detected image and the standard image, and when the difference exceeds a threshold, the processing module 483 sends a signal to the display unit 482 for displaying, when there is a difference between the detected image and the standard image, the processing module 483 sends a signal to the alarm unit 484 and issues an alarm, for example: when the difference between the detected image and the standard image exceeds 10%, the processing module 483 sends a signal to the display unit 482 to display and sends a signal to the alarm unit 484 to send an alarm.

In summary, the lens inspection apparatus of the present invention is configured such that the optical inspection module 40 is not in contact with the base 10, thereby preventing the image capturing unit 44 and other components of the base 10 from being damaged due to vibration, and saving the inspection cost.

The above description is only for the purpose of illustrating the preferred embodiments of the present invention and is not intended to limit the scope of the present invention, which is defined by the appended claims.

Claims

1. A lens inspection apparatus, comprising:

the base is provided with a vibration module, and the base is further provided with a fixing module for fixing a lens to be tested; and

an optical detection module disposed on one side of the base and not contacting the base, wherein the optical detection module comprises:

the light source is arranged on one side of the lens to be detected and generates at least one light ray which passes through the lens to be detected;

the detection graph is arranged on the outer side of the lens to be detected relative to the light source, and the light rays irradiate on the detection graph;

the image acquisition unit is arranged relative to the detection image, acquires the image of the detection image and generates a detection image; and

a comparison unit electrically connected with the image capture unit;

the comparison unit compares the difference between the detection image and a standard image to judge the yield of the lens to be detected.

2. The lens inspection device as claimed in claim 1, further comprising a suspension module, wherein the optical inspection module is suspended on the suspension module.

3. The lens detecting device as claimed in claim 1, wherein the vibration module includes at least one vibration unit, the vibration unit drives the base to vibrate.

4. The lens detecting device as claimed in claim 3, wherein the vibrating module is configured to drive the base to vibrate in a multi-axial manner.

5. The lens detecting device as claimed in claim 4, wherein the vibration module vibrates in a frequency conversion manner.

6. The lens inspection device as claimed in claim 1, wherein the optical inspection module further comprises a display unit electrically connected to the comparison unit.

7. The lens barrel detecting device as claimed in claim 6, wherein the display unit is electrically linked to a processing module, the processing module is configured with an algorithm for comparing a difference between the detected image and the standard image, and the processing module sends a signal when the difference exceeds a threshold.

8. The lens inspection device as claimed in claim 1, wherein the optical inspection module further comprises an alarm unit electrically connected to the comparison unit.

9. The lens barrel inspection device as claimed in claim 1, wherein the inspection chart includes a feature pattern.

10. The lens barrel inspection device as claimed in claim 9, wherein the feature pattern includes a cross mark or a resolution pattern.