CN201479319U

CN201479319U - Imaging detection device

Info

Publication number: CN201479319U
Application number: CN200920149775XU
Authority: CN
Inventors: 李丰雷
Original assignee: AZUREWAVE TECHNOLOGY (SHANGHAI) Co Ltd
Current assignee: AZUREWAVE TECHNOLOGY (SHANGHAI) Co Ltd
Priority date: 2009-06-18
Filing date: 2009-06-18
Publication date: 2010-05-19
Anticipated expiration: 2019-06-18

Abstract

The utility model provides an imaging detection device. A light source module, at least one test pattern and a bearing platform are arranged in a case from top to bottom in sequence, and a control system is connected in the case. The imaging detection device is characterized in that the bearing platform is provided with a base and a lifting table, wherein the base can be used for placing a bracket for a camera module, and a lens group is combined on the bracket; the lifting table is provided with a focusing ring capable of vertically moving relative to the base, and the focusing ring is shifted downwards during the test so that the bottom of the focusing ring is propped against the head part of the lens group for the purpose of fixing the camera module; and the control system is provided with an image sensor, the image sensor is arranged between the bracket for the camera module and the lens group and electrically connected with a control center and a display screen, a photoelectric signal passing through the lens group to be transformed into an electrical signal is read through the image sensor, and the electrical signal is transmitted to the control center and is then transformed into a calculation result to be transmitted to a display screen after being analyzed through the control center. Therefore, the imaging yield of the camera module is improved, and the time required for detecting the time course can be shortened for the camera module.

Description

Imaging detection device

Technical field

The relevant a kind of camera module testing apparatus of the utility model, particularly a kind of checkout gear that is applied to the photographing module of device for mobile communication, personal digital assistant and notebook computer etc.

Background technology

Lifting along with telecommunications product application popularization rate, functional completeness for telecommunications products such as mobile phone, notebook computer and personal digital assistants also requires diversification relatively, can see that increasing on the market electronic product all has the plyability function, especially possess the telecommunications product that the photography or the photographing module of taking pictures are arranged and popularize especially, also drive the Rong Jing of opto-electronics relatively; Also because so, how in the various again photographing module, the photographing module that selection fast and accurately is suitable for has become an important problem.

General photographing module is after manufacturing is finished, can do suitable detection at its lens group, (Modulation Transfer Function MTF), Defect Detection (blemish) etc., hands over to client's hand after lens group being combined in a bracket again to resolve modulation transfer function as optics; As patent application case numbers 200710134511 testing apparatus of module " a kind of mobile phone take pictures " with auto-focus function, one standard graph card, a testing light-cylinder from top to bottom are set in light box in regular turn, an and lens group to be measured, with light source projects through the standard graph card, light can pass testing light-cylinder, lens group to be measured, project again on the optics sensor chip,, understand the distant view sensing function of lens group to be measured by this via testing light-cylinder simulation distant view situation; Can also add test pattern in a similar manner, measure the physical characteristic of lens group, as the explanation in patent application case number 200410007975 " the lens optical parsing measurement systems ", in casing, between light source and lens group, add a test pattern and come detection optical inspection modulation transfer function (MTF) and parsing power.Detection like that, what all the physical characteristic of lens group can have been showed is very clear, and being made for already, personnel finely tune or supply client's reference as factory data.

But, to commonly use testboard and be and do MTF, Defect Detection at the lens group of photographing module earlier, the test pattern of arranging in pairs or groups is again done the test of parsing power, after the lens group test is finished, again with the bracket and the adjustment of focusing after lens group combines.But, electronics running gears such as mobile phone and notebook computer all develop towards miniaturization at present, relatively the photographing module volume is also very small, so-called " millimeter of mistake; a thousand li of difference ", lens group is the change of the previous test result of meeting Image lens group with combining of bracket, also therefore causes photographing module to adopt picture quality deviation; In view of this, the utility model proposes a kind of imaging detection device, in order to improve the availability that only whether meets customer demand in the past, but reckon without lens group and combine the image deviation influence that the back is produced with bracket, with the above-mentioned prior art problem points of effective improvement in the screening lens group.

Summary of the invention

The purpose of this utility model is, solves existing imaging detection device, and lens group and image deviation that can generation after bracket combine cause photographing module to adopt technical problem as the quality deviation.

In order to achieve the above object, the imaging detection device that the utility model discloses, in order to check a photographing module, this photographing module includes a lens group and the bracket of this lens group is carried in a holder; This imaging detection device includes:

One cabinet:

One light source module is located in this cabinet;

At least one test pattern is located in this cabinet, and is positioned at this light source module below;

One plummer is located in this cabinet, and is positioned at this test pattern below, and this plummer has a pedestal, and this bracket of this photographing module is placed on this pedestal; And a lifting platform, it links this pedestal, this lifting platform have a focusing ring relatively this pedestal move up and down, and this focusing ring replaces this lens group head of this photographing module when moving down, to fix this photographing module;

One control system has between this lens group and this bracket that an image sensor is installed in this photographing module, and this image sensor receives and passes a photosignal of this lens group, and this photosignal is converted to a signal of telecommunication; One control centre, this image sensor of its electrical ties, this control centre receives this signal of telecommunication and analyzes is an operation result; And a display screen, this control centre of its electrical ties, and can show this operation result.

The beneficial effects of the utility model are, can promote the imaging yield of photographing module; Can do multiple physical detection and focal length adjustment, detect the time-histories required time with the reduction photographing module; The versatility height can be used in the detection of different lens group and different bracket combinations.

Thus, photographing module can the complete nonnegotiable demands characteristic that reaches.Under cooperate appended graphic explanation in detail by specific embodiment, be convenient to the juror and be easier to understand and distinguish the purpose of this utility model, technology contents, characteristics and the effect of being reached thereof.

Description of drawings

Fig. 1 is a stereogram of the present utility model;

Fig. 2 is the stereogram of the utility model plummer;

Fig. 3 settles the schematic diagram of photographing module for Fig. 2;

Fig. 4 settles the end view of photographing module for the utility model;

Fig. 5 moves down the schematic diagram of replacing lens group head situation among Fig. 4 with focusing ring;

State diagram when Fig. 6 is actual detected;

Test pattern schematic diagram when Fig. 7 is actual detected;

The schematic flow sheet of Fig. 8 for detecting.

Description of reference numerals:

The 10-cabinet; The 101-opening; The 102-framework; The 12-light source module; The 14-test pattern; The 16-plummer; The 20-pedestal; The 22-storage tank; The 24-slide rail; The 30-lifting platform; The 31-runner block; The 32-focusing ring; The 321-opening; The 18-control system; The 50-image sensor; 52-control centre; The 54-display screen; The 40-photographing module; The 41-bracket; The 42-lens group.

Embodiment

The utility model is considered and is only screened the availability whether lens group meets customer demand in the past, might influence the camera module image quality after but reckoning without lens group and bracket combining, and treat lens group with bracket in conjunction with after the program of also need focusing, consuming time and not convenient.Therefore the utility model is done detection again in conjunction with behind the lens group of camera module and the bracket, and can focus simultaneously in the testing process, with shortening testing process and formality.

The utility model is a kind of imaging detection device, and at first with reference to figure 1, it includes a cabinet 10, a light source module 12, a test pattern 14, a plummer 16 and a control system 18.This cabinet 10 is circumferential closed casing (for more knowing show internal structure, its side plate of removal among the figure), is provided with an opening 101, the inside of cabinet 10 and horizontal fixed one framework 102 in its front near bottom position.One light source module 12 is located at cabinet 10 inner tip, and in order to provide cabinet 10 inner sufficient light sources, this light source module 12 also can be arranged on cabinet 10 outsides, by perforate on cabinet 10 light-ray condensing is throwed towards cabinet 10 bottoms.The test pattern (not shown) is placed on the framework 102 of cabinet 10, and its corresponding testing is different and can adopt different patterns.Cooperate and consult Fig. 2 and Fig. 3, plummer 16 is the combination of a pedestal 20 and a lifting platform 30, and this pedestal 20 is fixed on cabinet 10 inner bottom surface, its end face offers a storage tank 22, in order to the bracket 41 of settling a photographing module 40, moreover these pedestal 20 1 end faces also uprightly are provided with a slide rail 24; Secondly, lifting platform 30 1 ends are provided with a runner block 31, the other end is provided with a focusing ring 32, this runner block 31 is incorporated on the slide rail 24 of pedestal 20, when making lifting platform 30 slippages, focusing ring 32 is storage tank 22 upper and lower displacements of pedestal 20 relatively, in addition, focusing ring 32 is that the mode with the male and female screw thread is incorporated on the lifting platform 30, therefore the focusing ring 32 clockwise or reverse of lifting platform 30 and upper and lower displacement relatively, again, focusing ring 32 has an opening 321, these opening 321 diameters are slightly less than the lens group 42 of photographing module 40, in order to replace the head of lens group 42 when testing.And control system 18 mainly is made up of an image sensor 50, a control centre 52 and a display screen 54, image sensor 50 can be placed between the lens group 42 and bracket 41 of photographing module 40, it has the photosignal of reception, is the ability of the signal of telecommunication again with electrical signal conversion; And this image sensor 50 of control centre's 52 electrical ties in order to the signal of telecommunication of reception image sensor 50, and behind control centre's 52 interpretation signals of telecommunication, can calculated into this signal of telecommunication analysis one operation result; These display screen 54 electrical ties control centres 52 in order to the operation result that is provided by control centre 52 to be provided, provide the tester test data of photographing module 40 to be measured again.

Then consult Fig. 4 and Fig. 5, the tester can select photographing module 40 to be measured, the bracket 41 of photographing module 40 to be measured is seated in earlier in the storage tank 22 of pedestal 20, then, the image sensor 50 that installing will be adopted on bracket 41, then, the lens group 42 of photographing module 40 to be measured is installed, and with lifting platform 30 declines, till the opening 321 of focusing ring 32 entangles lens group 42 heads, by this, fixedly the relative position in photographing module 40 and the cabinet 10 promptly can detect at required project.Consult Fig. 6, Fig. 7 and Fig. 8, be the utility model one photographing module 40 complete testing processes to be measured, at this wherein, after photographing module 40 to be measured installed, the tester can do test according to the depth of field (DOF test), cent(e)ring (Centering test), shading correction (shadingtest), aberration (Color Shading test), detection of particulates (Particle test), noise (Noise test), automatic exposure (AE test) white balance (AWB test); Certainly, program in the middle of this must be changed the image sensor 50 of different test pattern 14 and corresponding usefulness and just can reach, and in the different testing process controls, control centre 52 must have the correspondence database analysis that just can compare, because the image sensor of the existing mostly standard testing graph card of present every detection, relative engagement, and detection software that can be corresponding, its mode of using of can arranging in pairs or groups is numerous, those skilled in the art also can simply buy or get by illegal means application, so the present invention is not at this detailed description.

By this, the utility model considers that the photographing module overall integrity provides test, not only can improve the production yield, and focusing in the lump in the testing process, shortens testing process and time again.In addition, have displacement between the lens group of photographing module and special-purpose bracket, so, road ability and practicality between testing product increased.

More than be illustrative to description of the present utility model; and it is nonrestrictive; those skilled in the art is understood, and can carry out many modifications, variation or equivalence to it within spirit that claim limits and scope, but they will fall in the protection range of the present utility model all.

Claims

1. imaging detection device, in order to check a photographing module, this photographing module includes a lens group and the bracket of this lens group is carried in a holder; It is characterized in that this imaging detection device includes:

One cabinet:

One light source module is located in this cabinet;

2. imaging detection device as claimed in claim 1 is characterized in that this focusing ring can rotate, and adjusts the imaging definition that this lens group is incident upon this image sensor.

3. imaging detection device as claimed in claim 1 is characterized in that, this pedestal of this plummer has a slide rail, and this lifting platform has the slide rail of a runner block in conjunction with this pedestal.

4. imaging detection device as claimed in claim 1 is characterized in that this cabinet has an opening.

5. imaging detection device as claimed in claim 1 is characterized in that, has a framework in this cabinet, and this test pattern is placed on this framework.

6. imaging detection device as claimed in claim 1 is characterized in that, this base top surface of this plummer has a storage tank, and the bracket of this photographing module places in this storage tank.