CN1725097A - Monitoring device and method of optical center - Google Patents
Monitoring device and method of optical center Download PDFInfo
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- CN1725097A CN1725097A CN200410071700.6A CN200410071700A CN1725097A CN 1725097 A CN1725097 A CN 1725097A CN 200410071700 A CN200410071700 A CN 200410071700A CN 1725097 A CN1725097 A CN 1725097A
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Abstract
The invention is an optical center monitoring device and method for corresponding to a lens to calculate an optical center of a sensor array. The sensor array comprises a plurality of sensing cells. The optical center monitoring device comprises a monitoring component and a processing unit, where the monitoring component is used to arrange the lens and the sensor array. When a testing light comes to the lens, the sensor array makes each sensing cell separately obtain a sensed value by detecting the quantity of the testing light. The processing unit is connected with the sensor array through the monitoring component to select a plurality of sensing cells with a certain sensed value each so as to calculate the optical center.
Description
Technical field
The present invention relates to a kind of optical centre monitoring device and method.More particularly, the present invention relates to a kind of optical centre monitoring device and method that a digital picture forms system that be applied to.
Background technology
It is wide popular consumer products that digital camera is become by the professional equipment of costliness.Its principle is to utilize camera lens with the sensor of image projection to digital camera, for example on the Charged Coupled Device (ChargeCoupled Device, abbreviation CCD).By Charged Coupled Device, the light signal with camera lens is taked converts the digital picture signal to, by the processing of electronic circuit, the digital picture signal is stored in the internal memory again.
Image sensor is generally the form of an array, by 320 * 240,640 * 480,1280 * 960 of very early time, the main flow on the market 2048 * 1536 up to now.Thereby along with the continuous progress of sensor, digital camera occupies the ground of a seat gradually on market, and along with digital camera and sensor component succeeding in developing in succession, digital camera replaces traditional camera gradually and becomes main flow on the market at present.
Form in the assembling process of device (as digital camera or lens assembly) in digital picture, it is an individual good problem to study that the optical axis that how to detect sensor array center and eyeglass aligns levels of collimation.Especially form in the device in high-quality digital picture, also need the center of sensor array itself is aimed at the optical axis (optical axis) of eyeglass, and the intersection point on lens light axis and this sensor array, be this paper alleged " optical centre ", the optical axis by calibration sensor array center and eyeglass is best in quality with the acquisition image.
General known calibrating mode is to utilize register pin (position pin), sensor array is fixed in the position on a picture plane (image plane) in lens barrel (lens barrel) structure.Yet in higher SLR (single lens reflex) camera system,, therefore need more complicated design because the camera lens of camera can be changed.For example at United States Patent (USP) the 5th, 483, in No. 284,, exactly sensor array is arranged on the position on picture plane by the register pin on four corners.Yet United States Patent (USP) the 5th, 483 there is no the direction that is disclosed in vertical optical axis No. 284, adjusts the position of sensor with respect to lens light axis.Relative therewith, United States Patent (USP) the 6th, 628 is then addressed a kind of fixed sturcture in No. 339, is to utilize a shaft collar (mountingplate), can adjust the position of sensor with respect to lens light axis in the direction of vertical and parallel optical axis.
About the definition of optical axis, can be referring to " http://www.photonics.com/directory/ ", or " http://www.usa.canon.com/eflenses/lens1001/glossary/index_a.htm l ".Briefly, in a reflective or refraction type optical module, " optical axis " is the axis by each surface curvature center of assembly, and optical axis also can be by the focus of this optical module.Because optical axis is not an entity, therefore do not have a kind of mode easily at present, with alignment optical center whether, the center of judging sensor itself.Eyeglass when light beam incident one camera with the direction of parallel optical axis, can focus on a focus of this eyeglass, and the light intensity that is detected on this focal position has a maximal value, so position that can have the maximal value light intensity by searching, seeking the focus of this eyeglass, and alignment optical center whether, the center of further judging sensor.Yet in practical application, noise may cause recording the position of maximal value light intensity, is not equal to the position of focus, and then causes a deviation in the process of aiming at.
Summary of the invention
A purpose of the present invention provides a kind of optical centre monitoring device and method, to monitor an optical centre on the sensor array.
Another purpose of the present invention provides a kind of optical centre monitoring device and method, in the alignment procedures of a sensor array and an eyeglass, for the deviation of the center of an optical centre and this sensor array itself on this sensor array of judgement.
Another object of the present invention provides a kind of optical centre monitoring device and method, forms in the manufacture process of device in digital picture, judges the deviation of the center of an optical centre and this sensor array itself on the sensor array.
A further object of the present invention provides a kind of lens assembly detection method, in this lens assembly in the alignment procedures of a sensor array and a lens set, for the departure of the center of an optical centre and this sensor array itself on this sensor array of detection, to determine the quality of this lens assembly.
When test light incident one eyeglass that is parallel to optical axis, for arbitrary plane vertical with optical axis behind this eyeglass, the Luminance Distribution on the plane is to have a symmetry corresponding to this optical axis.Therefore, the one plane sensor array vertical with this optical axis is set to receive the light that this eyeglass penetrates, light intensity measured on this sensor array has symmetry, then can be according to the pairing position of specific sensing cell, judge the intersection point of this optical axis on this sensor array, meaning is the present invention's alleged " optical centre ".Monitor optical axis with the mode of the focus of known technology by seeking eyeglass and compare with the means of optical centre, the present invention is fast simple and precisely, and can judge the range deviation between the center of this optical centre and sensor array itself easily.
Notion of the present invention, characteristic according to the optical axis of eyeglass is the highest place of imaging surface brightness, and the brightness meeting of other position, whole picture plane is because the reason of oblique incidence, along with deepening away from optical axis, therefore can distribute by brightness (luminance) level line (contour) that is parsed into image planes (image plane), calculate the isocontour geometric center of brightness, to obtain the optical centre position of optical system at imaging surface.Thereby, the present invention proposes a kind of optical centre monitoring device, supply a corresponding eyeglass to calculate an optical centre on the sensor array, this sensor array comprises a plurality of sensing cells, each this sensing cell has a position on this sensor array, this eyeglass has an optical axis, and this optical centre monitoring device comprises a monitoring assembly and a processing unit.This monitoring assembly is for being provided with this eyeglass and this sensor array, and wherein, when this eyeglass of test light incident of parallel this optical axis, then this sensor array is received from this eyeglass test light quantity by detecting one, and makes each sensing cell obtain a sensing value.This processing unit is connected with this sensor array via this monitoring assembly, chooses the pairing position of a plurality of sensing cells with a specific sensing value from a plurality of sensing value, calculates this optical centre.
The present invention also proposes a kind of optical centre monitoring method, supply a corresponding eyeglass to calculate an optical centre on the sensor array, this sensor array comprises a plurality of sensing cells, each this sensing cell has a position on this sensor array, this eyeglass has an optical axis, this method comprises: (a) provide a test light, this eyeglass of incident with the direction of parallel this optical axis; (b) this sensor array is received from the test light quantity of this eyeglass by detecting one, and makes each sensing cell obtain a sensing value; (c) from a plurality of sensing value, choose the pairing position of a plurality of sensing cells with a specific sensing value; And (d) calculate optical centre on this sensor array.
Description of drawings
Accompanying drawing is for cooperating instructions to explain the present invention.
Fig. 1 a is the optical centre monitoring device synoptic diagram of one embodiment of the invention;
Fig. 1 b is the optical centre monitoring device synoptic diagram of another embodiment of the present invention;
Fig. 2 a to Fig. 2 d is the synoptic diagram of sensor array among the different embodiment;
Fig. 3 a is the optical centre method flow diagram of one embodiment of the invention;
Fig. 3 b is the optical centre method flow diagram of another embodiment of the present invention; And
Fig. 4 a to Fig. 4 f is the digital test image according to the embodiment of the invention.
The reference numeral explanation:
100,150 optical centre monitoring devices
101 monitoring assemblies
151 image pickup assemblies
102,152 eyeglasses
104,150 sensor arrays
106,156 processing units
The TL test light
The OA optical axis
Embodiment
Fig. 1 a is optical centre (optical center) the monitoring device synoptic diagram according to one embodiment of the invention.Optical centre monitoring device 100 supplies a corresponding eyeglass (lens) 102 to calculate an optical centre on the sensor array 104.Optical centre monitoring device 100 comprises a monitoring assembly 101 and a processing unit 106.What deserves to be mentioned is that eyeglass 102 further can be used as an image pickup assembly with sensor array 104,, produce a Digital Image Data for these optical centre monitoring device 100 corresponding objects.
In one embodiment, monitoring assembly 101 has a pedestal (not shown), for eyeglass 102 and sensor array 104 are set, and provide with sensor array 104 between necessary being electrically connected with signal handle.This pedestal can have one and adjust function, optionally according to the result of the following stated optical centre monitoring, carries out aiming at of eyeglass 102 and sensor array 104 for the user.After finishing aligning, again with the relative position of known encapsulation technology fixing len 102 with sensor array 104.What deserves to be mentioned is that the eyeglass 102 after the encapsulation can separate with monitoring assembly 101 with sensor array 104, and monitoring assembly 101 can be used for aiming at of next set of contact lenses and sensor array.
Eyeglass 102 has an optical axis (optical axis) OA, and for the incident of accepting a test light TL, this test light TL is parallel to optical axis OA.In one embodiment, monitoring assembly 101 is further combined with a uniform planar luminophor (not shown), so that this parallel testing light TL to be provided, for example Japanese kettle slope (the TSUBOSAKAELECTRIC CO. of Electric Co., Ltd, LTD.) " the light source box " that is produced, also can use an integrating sphere (Integrating Sphere), or can utilize general light source to cooperate a diffusing globe (diffuser).Before test light TL incident, need utilize an illuminometer (light meter) or other optical gauge to measure, to determine homogeneity and the direct of travel of test light TL.What deserves to be mentioned is that eyeglass 102 is non-limiting to be one to focus on (convergent) eyeglass or and disperse (divergent) eyeglass, also is a non-refractor or the reflecting optics of being defined as.In addition, in conjunction with a plurality of eyeglasses, optically to produce the design that has same effect with eyeglass 102, also in scope that the present invention will be contained.
Fig. 2 a to Fig. 2 d is the synoptic diagram of sensor array 104 among the different embodiment, yet those skilled in the art should be understood that with sensor array cellular or that alternate manner is arranged, also in the scope that the present invention will be contained.Sensor array 104 comprises a plurality of sensing cells, and each this sensing cell has a position on sensor array 104, and sensor array 104 is received from the test light quantity of eyeglass 102 by detecting one, and makes each sensing cell obtain a sensing value.What deserves to be mentioned is that sensor array 104 might not be arranged on the picture plane (image plane) of eyeglass 102 and locate, and sensor array 104 can be arranged on and this is as parallel plane position any.
Processing unit 106 is connected with sensor array 104 via monitoring assembly 101.In one embodiment, processing unit 106 is a computing machine, is connected with monitoring assembly 101 via a USB (universal serial bus).Processing unit 106 is chosen the pairing position of a plurality of sensing cells with a specific sensing value from a plurality of sensing value, and calculates an optical centre on the sensor array 104.Processing unit 106 can comprise a tailored version processor, or a universal processor, and can implement by the combination of software, hardware or software and hardware.
In the explanation below in conjunction with Fig. 2 a, 2b, 2c and 2d, sensor array 104 has 7X7 sensing cell, and sensor array 104 is divided into 49 (meaning is 7 * 7) positions.Add coordinate in the accompanying drawing with aid illustration.What deserves to be mentioned is, Centromedian position (4,4) be the center of sensor array 104 itself, therefore can pass through the distance of position and the sensor array 104 Centromedian positions of the optical centre that calculates, judge whether eyeglass 102 and sensor array 104 finish alignment procedure.
In the embodiment shown in Fig. 2 a, the sensing cell that indicates A is represented the sensing value (for example brightness value is all 100) of a tool same brightness, and the sensing cell of sign B is represented the sensing value (for example brightness value is all 200) of another tool same brightness.The pairing position of all sensing cell A (or sensing cell B) forms a closed curve at sensor array 104.Can be according to the geometric center (3,4) of all pairing positions of sensing cell A, as optical centre; Or according to the geometric center (3,4) of all pairing positions of sensing cell B, as optical centre; Even according to the common geometric center (3,4) in all pairing positions of sensing cell A and all pairing positions of sensing cell B, as optical centre.The selection of this optical centre is answered the characteristic (disperse, converge) of visor sheet and the character of sensor array (brightness is directly proportional with sensing value, inverse ratio) and is decided, in another embodiment, the sensing value that has convergence characteristics and sensor array with eyeglass is directly proportional with brightness and is example, so should select the sensing value of sensing cell A to be the maximal value in these a plurality of sensing value, and calculate the geometric center (3 of all pairing positions of sensing cell A with processing unit 106,4), as optical centre.
And among Fig. 2 b, the sensing cell that indicates A is represented the sensing value of tool same brightness, and the sensing cell that indicates B is represented the sensing value of another same brightness of tool, and the pairing position of all sensing cell A (or sensing cell B) forms a rotational symmetry at sensor array 104 and distributes.Can be according to the geometric center (4,4) of all pairing positions of sensing cell A, as optical centre; Or according to the geometric center (4,4) of all pairing positions of sensing cell B, as optical centre; Even according to the common geometric center (4,4) in all pairing positions of sensing cell A and all pairing positions of sensing cell B.In another embodiment, be directly proportional with brightness with the sensing value of eyeglass tool divergence characterization and sensor array and be example, so should select the sensing value of sensing cell B to be the minimum value in these a plurality of sensing value, and calculate the geometric center (4 of all pairing positions of sensing cell B with processing unit 106,4), as optical centre.
In the another embodiment shown in Fig. 2 a or the 2b, when the brightness impression measured value of the sensing cell A brightness impression measured value greater than all sensing cells, then processing unit 106 calculates the geometric center of all pairing positions of sensing cell A, as optical centre.Or in sensor array 104, when the quantity with the brightness impression measured value that is same as sensing cell B during more than sensing cell A and other all sensing cells, then processing unit 106 calculates the geometric center of all pairing positions of sensing cell B, as this optical centre.What deserves to be mentioned is that the geometric center of the pairing position of sensing cell A is equal to the geometric center with the pairing position of sensing cell B among Fig. 2 a and Fig. 2 b.Yet those skilled in the art should work as and know, in the practical application, because the cause of noise, shown in Fig. 2 c, the geometric center (4 of the pairing position of sensing cell A, 4) can not be equal to geometric center (3,4) with the pairing position of sensing cell B, and this situation is also in the scope that the present invention will be contained.
In one embodiment, processing unit 106 is chosen the pairing position of a plurality of effective sensing cells further by in these a plurality of sensing value, and wherein the sensing value of each this effective sensing cell is less than or equal to a fixed value with the difference of this specific sensing value.Processing unit 106 further calculates this pairing position of a plurality of effective sensing cells and the common geometric center in the pairing position of a plurality of sensing cells with this specific sensing value, as optical centre.In addition, processing unit 106, is for example worked as eyeglass 102 and is had focus characteristics to determine this fixed value also optionally according to maximal value or minimum value in these a plurality of sensing value, and then processing unit 106 is according to the maximal value in these a plurality of sensing value, to determine this fixed value; Have divergence characterization and work as eyeglass 102, then processing unit 106 is according to the minimum value in these a plurality of sensing value, to determine this fixed value.
With Fig. 2 d is example, and the sensing value of selected sensing cell A is a specific sensing value.The sensing value of all sensing cell C is less than or equal to a fixed value with the difference of this specific sensing value.Processing unit 106 further calculates all pairing positions of sensing cell A and the common geometric center (4,4) in all pairing positions of sensing cell C, as optical centre.For instance, this specific sensing value is 100, then processing unit 106 adopt these specific sensing value ten minutes one, just 10 as this fixed value, then the sensing value scope of sensing cell C is 90 to 110, therefore calculate the sensing value scope and be 90 to 110 the common geometric center in the pairing position of sensing cell, as optical centre.In another example, when the sensing value of sensing cell A is a maximal value in these a plurality of sensing value, for example be 100, processing unit 106 is with the descending ordering of remaining sensing value, choosing ordering is the 3rd sensing value, for example is 95, and the difference that then with the sensing value of sensing cell A and this ordering is the 3rd sensing value is as this fixed value (being 5 in this embodiment), therefore calculate the sensing value scope and be 95 to 100 the common geometric center in the pairing position of sensing cell, as optical centre.In another example, when the sensing value of sensing cell A is a minimum value in these a plurality of sensing value, then processing unit 106 with 10 times minimum value as this fixed value.
In addition, processing unit 106 also produces a digital test image, with to should the position of a plurality of sensing cells on sensor array 104 and these a plurality of sensing value, and in this digital test image corresponding display optical center.In this digital test image and the corresponding center that shows sensor array 104 itself, judge both deviations for the user.
Fig. 1 b is optical centre (optical center) monitoring device synoptic diagram according to another embodiment of the present invention.Optical centre monitoring device 150 comprises an image pickup assembly (image pick up unit) 151 and one processing unit 156.Image pickup assembly 151 produces Digital Image Data for corresponding object.Image pickup assembly 151 comprises an eyeglass 152 and a sensor array 154.Eyeglass 151 has an optical axis, and for the incident of accepting a test light, this test light is parallel to this optical axis.Sensor array 154 comprises a plurality of sensing cells, and each this sensing cell has a position on sensor array 154, and sensor array 154 makes each sensing cell obtain a sensing value by being received from the test light quantity of eyeglass 152.Processing unit 156 is connected with image pickup assembly 151, chooses the pairing position of a plurality of sensing cells with a specific sensing value from a plurality of sensing value, calculates an optical centre on the sensor array 154.And among Fig. 2 a to Fig. 2 d for the explanation and the narration of optical centre monitoring device 100, also be applicable to optical centre monitoring device 150.And, also be applicable to eyeglass 152 and sensor array 154 about the explanation and the narration of eyeglass 102 with sensor array 104.
In addition, the notion of the described selection optical centre of the foregoing description is the highest place of imaging surface brightness according to the characteristic of the optical axis of eyeglass, and the brightness meeting of other position, whole picture plane because the reason of oblique incidence along with deepening away from optical axis, and distribute by brightness (luminance) level line (countour) that is parsed into image planes (image plane), find out the isocontour geometric center of brightness, to obtain the optical centre position of optical system at imaging surface, can learn the optical centre position of the optical axis of eyeglass whereby corresponding to sensor array, optical centre as Fig. 2 a is (3,4), and best sensor array geometric center is (4,4), can make optical centre aim at the center of sensor array itself whereby with the relative position of calibration eyeglass and sensor array.
What deserves to be mentioned is, optical centre monitoring device 150 can be used as a digital picture and forms device, for example digital camera, digital camera camera and have digital camera and/or the portable electronic devices of digital camera camera function, the mobile phone that for example has camera function, or has personal digital assistant of camera function or the like, scopes that will contain all in the present invention.
The present invention proposes a kind of optical centre monitoring method, supply a corresponding eyeglass to calculate an optical centre on the sensor array, this sensor array comprises a plurality of sensing cells, and each this sensing cell has a position on this sensor array, and this eyeglass has an optical axis.Fig. 3 a is the optical centre monitoring method process flow diagram that cooperates the optical centre monitoring device of Fig. 1 a with Fig. 3 b.In the step 301, provide a test light TL, incident eyeglass 102 with the direction of parallel optical axis OA." light source box LSB-80 " that this test light TL can utilize Japanese kettle slope Electric Co., Ltd to be produced produces.
In step 303, sensor array 104 receives the light that eyeglasses 102 penetrate, and each sensing cell obtains a sensing value, in one embodiment, sensor array 104 further according to the sensing value of each sensing cell to form an image.In the step 305, from a plurality of sensing value, choose the pairing position of a plurality of sensing cells with a specific sensing value, for example can be with the maximal value in these a plurality of sensing value or minimum value as this specific sensing value.In the step 307, calculate an optical centre on the sensor array 104, in one embodiment, step 307 is to calculate the geometric center of the pairing position of a plurality of sensing cells with this specific sensing value, as optical centre.
In another embodiment shown in Fig. 3 b, step 317 is optionally according to maximal value or minimum value in these a plurality of sensing value, to determine a fixed value, for example work as eyeglass 102 and have focus characteristics, then one of the peaked ten minutes in these a plurality of sensing value of basis as this fixed value; When eyeglass 102 has divergence characterization, then according to the twice of the minimum value in these a plurality of sensing value, as this fixed value.Step 319 is by in these a plurality of sensing value, also chooses the pairing position of a plurality of effective sensing cells, and wherein the sensing value of each effective sensing cell is less than or equal to this fixed value with the difference of this specific sensing value.In the step 321, calculate this pairing position of a plurality of effective sensing cells and have the geometric center of the pairing position of a plurality of sensing cells of this specific sensing value, as optical centre.
In addition, Fig. 3 a or the described method of Fig. 3 b also can comprise sets a default departure, by setting optical system acceptable range deviation amount between the center of optical centre and sensor array itself, can detect the quality of eyeglass and sensor array calibration in the monitoring assembly whereby, as default departure is X, the actual deviation amount is Y, then if X then is certified products greater than Y, anti-then is poor products, at this moment, processing unit can send a warning signal to drive an alarming device, can utilize monitoring assembly to carry out Quality Detection easily and effectively whereby.
Fig. 3 a or the described method of Fig. 3 b can also comprise: produce a digital test image with corresponding each this sensing cell position on this sensor array, comprising the corresponding position that shows the center of sensor own in this digital test image.Fig. 4 a to Fig. 4 f is the digital test image according to the embodiment of the invention, the position of the sensing cell on the corresponding sensor array and have 352 * 288 pixels (pixel).In this digital test image, show respectively sensing value be 90,100,110,120,130,140,150, with the pairing positions of many group sensing cells such as 160.For instance, referring to Fig. 4 a, sensing value 150 is the maximal values in these many group sensing value, then chooses sensing value and be 150 the pairing position of sensing cell (step 305), and the computational geometry center is with as optical centre (step 307).In another embodiment shown in Fig. 4 a, the deviation between the center of also display optical center in this digital test image, and display optical center and sensor array itself is 3.1452 pixels, for user's reference.
With Fig. 4 b is example, because being 130 the pairing position of sensing cell, sensing value forms a closed curve, and the quantity of pairing position is 140 or 150 sensing cell more than sensing value, then choose sensing value and be 130 the pairing position of sensing cell (step 305), the computational geometry center is with as optical centre (step 307).In another embodiment shown in Fig. 4 b, the deviation between the center of also display optical center in this digital test image, and display optical center and sensor array itself is 15.9203 pixels.
With Fig. 4 c is example, sensing value is that 150 the pairing position of sensing cell is because the relation of noise, its axial symmetry is relatively poor, therefore choose sensing value and be 160 pairing position of sensing cell and sensing value and be 140 the pairing position of sensing cell (step 305), the computational geometry center is with as optical centre (step 307).In another embodiment shown in Fig. 4 c, the deviation between the center of also display optical center in this digital test image, and display optical center and sensor array itself is 39.224 pixels.
With Fig. 4 d is example, is that to choose sensing value be that 150 pairing position of sensing cell and sensing value are 140 the pairing position of sensing cell (step 305), and the computational geometry center is with as optical centre (step 307).In another embodiment shown in Fig. 4 d, the deviation between the center of also display optical center in this digital test image, and display optical center and sensor array itself is 28.9492 pixels.
With Fig. 4 e is example, be that to choose sensing value be that 150 the pairing position of sensing cell, sensing value are that 140 pairing position of sensing cell and sensing value are 130 the pairing position of sensing cell (step 305), the computational geometry center is with as optical centre (step 307).In another embodiment shown in Fig. 4 e, the deviation between the center of also display optical center in this digital test image, and display optical center and sensor array itself is 13.4406 pixels.
Fig. 4 f is an example, if sensing value 150 is the maximal value in these a plurality of sensing value, then setting this fixed value is 20 (steps 317), and chooses all sensing value between the pairing position of 130 to 150 sensing cell (step 319), and the computational geometry center is with as optical centre (step 321).In another embodiment shown in Fig. 4 f, the deviation between the center of also display optical center in this digital test image, and display optical center and sensor array itself is 42.842 pixels.
The present invention also proposes a kind of computer fetch medium, has a section sign indicating number of carrying out by a computing machine, in order to carry out the optical centre monitoring method shown in Fig. 3 a or Fig. 3 b.Fig. 3 a or the described step of Fig. 3 b can be implemented by computer program instructions whereby.This computer fetch medium can be any suitable computer fetch medium, comprises internal memory, hard disk, light memory device, magnetic storage device or the like.
Above-mentioned explanation is not the restriction to category of the present invention, and the arrangement of above-mentioned explanation and various change and isotropism is all in the claimed scope of claims scope of the present invention.
Claims (33)
1. optical centre monitoring device, to calculate an optical centre on the sensor array, this sensor array comprises a plurality of sensing cells for a corresponding eyeglass, and each this sensing cell has a position on this sensor array, this eyeglass has an optical axis, and this optical centre monitoring device comprises:
One monitoring assembly, this monitoring assembly is for being provided with this eyeglass and this sensor array, and wherein, when this eyeglass of test light incident of parallel this optical axis, then this sensor array makes each this sensing cell obtain a sensing value by being received from the test light quantity of this eyeglass; And
One processing unit, this processing unit is connected with this sensor array via this monitoring assembly, chooses the pairing position of a plurality of sensing cells with a specific sensing value from a plurality of sensing value, calculates this optical centre.
2. optical centre monitoring device as claimed in claim 1 is characterized in that: this monitoring assembly also comprises a Digital System Processor, and this Digital System Processor is used to control this sensor array and makes each this sensing cell obtain this sensing value.
3. optical centre monitoring device as claimed in claim 1 is characterized in that: this sensing value is to be a brightness value.
4. optical centre monitoring assembly as claimed in claim 1, this processing unit also provide a default departure set-up function, with the default departure in one between the center of setting this optical centre and this sensor array itself.
5. optical centre monitoring assembly as claimed in claim 4, it is characterized in that: this processing unit also provides a warning signal, wherein, then send this warning signal when the departure between the center of this optical centre and this sensor array itself during greater than this default departure.
6. optical centre monitoring device as claimed in claim 1, it is characterized in that: this processing unit also produces a digital test image with to should the position of a plurality of sensing cells on this sensor array and this a plurality of sensing value, and in this digital test image corresponding this optical centre of demonstration.
7. optical centre monitoring device as claimed in claim 1 is characterized in that: this processing unit calculates the geometric center of the pairing position of a plurality of sensing cells with this specific sensing value, as this optical centre.
8. optical centre monitoring device as claimed in claim 1 is characterized in that: this specific sensing value is maximal value or minimum value in these a plurality of sensing value.
9. optical centre monitoring device as claimed in claim 1, it is characterized in that: this processing unit is further by choosing the pairing position of a plurality of effective sensing cells in these a plurality of sensing value, wherein the sensing value of each this effective sensing cell is less than or equal to a fixed value with the difference of this specific sensing value, this processing unit further calculates this pairing position of a plurality of effective sensing cells and has the geometric center of the pairing position of a plurality of sensing cells of this specific sensing value, as this optical centre.
10. optical centre monitoring device as claimed in claim 9 is characterized in that: this processing unit also optionally according to maximal value or minimum value in these a plurality of sensing value, is determined this fixed value.
11. optical centre monitoring device as claimed in claim 9 is characterized in that: this specific sensing value is maximal value or minimum value in these a plurality of sensing value.
12. an optical centre monitoring device comprises:
One image pickup assembly, this image pickup assembly produces a Digital Image Data for a corresponding object, and this image pickup assembly comprises:
One eyeglass, this eyeglass has an optical axis, and for the incident of accepting a test light, this test light is parallel to this optical axis; And
One sensor array, this sensor array comprises a plurality of sensing cells, and each this sensing cell has a position on this sensor array, and this sensor array makes each this sensing cell obtain a sensing value by being received from the test light quantity of this eyeglass; And
One processing unit, this processing unit is connected with this image pickup assembly, chooses the pairing position of a plurality of sensing cells with a specific sensing value from a plurality of sensing value, calculates an optical centre on this sensor array.
13. optical centre monitoring device as claimed in claim 12 is characterized in that: this sensing value is a brightness value.
14. optical centre monitoring device as claimed in claim 12 is characterized in that: this monitoring assembly also comprises a Digital System Processor, this Digital System Processor is used to control this sensor array and makes each this sensing cell obtain this sensing value.
15. optical centre monitoring device as claimed in claim 12, it is characterized in that: this processing unit also produces a digital test image with to should the position of a plurality of sensing cells on this sensor array and this a plurality of sensing value, and in this digital test image corresponding this optical centre of demonstration.
16. optical centre monitoring device as claimed in claim 12 is characterized in that: this processing unit calculates the geometric center of the pairing position of a plurality of sensing cells with this specific sensing value, as this optical centre.
17. optical centre monitoring device as claimed in claim 12 is characterized in that: this specific sensing value is maximal value or minimum value in these a plurality of sensing value.
18. optical centre monitoring device as claimed in claim 12, it is characterized in that: this processing unit is further by choosing the pairing position of a plurality of effective sensing cells in these a plurality of sensing value, the sensing value of each this effective sensing cell is less than or equal to a fixed value with the difference of this specific sensing value, this processing unit further calculates this pairing position of a plurality of effective sensing cells and has the geometric center of the pairing position of a plurality of sensing cells of this specific sensing value, as this optical centre.
19. optical centre monitoring device as claimed in claim 18 is characterized in that: this processing unit also optionally according to maximal value or minimum value in these a plurality of sensing value, is determined this fixed value.
20. optical centre monitoring device as claimed in claim 18 is characterized in that: this specific sensing value is maximal value or minimum value in these a plurality of sensing value.
21. optical centre monitoring method, to calculate an optical centre on the sensor array, this sensor array comprises a plurality of sensing cells for a corresponding eyeglass, and each this sensing cell has a position on this sensor array, this eyeglass has an optical axis, and this method comprises:
(a) provide a test light, this eyeglass of incident with the direction of parallel this optical axis;
(b) this sensor array makes each this sensing cell obtain a sensing value by being received from the test light quantity of this eyeglass;
(c) from a plurality of sensing value, choose the pairing position of a plurality of sensing cells with a specific sensing value; And
(d) calculate this optical centre on this sensor array.
22. method as claimed in claim 21 is characterized in that: also comprise:
(e) produce a digital test image with corresponding each this sensing cell position on this sensor array; And
(f) corresponding this optical centre that shows in this digital test image.
23. method as claimed in claim 21 is characterized in that: also comprise:
(g) set a default departure; And
(h) relatively should default departure and the center of this optical centre and this sensor array itself between departure.
24. method as claimed in claim 23 is characterized in that: this departure be to should optical centre and the center of this sensor array itself between range deviation.
25. method as claimed in claim 21 is characterized in that: this sensing value is a brightness value in the step (b).
26. method as claimed in claim 25 is characterized in that: these a plurality of sensing cells that have this specific sensing value in the step (c) are for all having a plurality of sensing cells of a particular luminance value.
27. method as claimed in claim 26 is characterized in that: step (c) also comprises: indicate a level line, have the pairing position distribution of these a plurality of sensing cells of this particular luminance value with demonstration.
28. method as claimed in claim 21 is characterized in that: step (d) comprising: calculate the geometric center of the pairing position of a plurality of sensing cells with this specific sensing value, as this optical centre.
29. method as claimed in claim 21 is characterized in that: this specific sensing value is maximal value or minimum value in these a plurality of sensing value.
30. method as claimed in claim 21 is characterized in that: step (d) also comprises:
(i) choose the pairing position of a plurality of effective sensing cells from these a plurality of sensing value, wherein the sensing value of each this effective sensing cell is less than or equal to a fixed value with the difference of this specific sensing value; And
(j) calculate this pairing position of a plurality of effective sensing cells and have the geometric center of the pairing position of a plurality of sensing cells of this specific sensing value, as this optical centre.
31. method as claimed in claim 30 is characterized in that: step (i) also comprises: optionally according to maximal value or minimum value in these a plurality of sensing value, to determine this fixed value.
32. method as claimed in claim 30 is characterized in that: this specific sensing value is maximal value or minimum value in these a plurality of sensing value.
33. the computer fetch medium with section sign indicating number of carrying out by a computing machine is in order to carry out as described optical centre monitoring method one of in the claim 21 to 32.
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| CNB2004100717006A CN100428049C (en) | 2004-07-21 | 2004-07-21 | Monitoring device and method of optical center |
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| CNB2004100717006A CN100428049C (en) | 2004-07-21 | 2004-07-21 | Monitoring device and method of optical center |
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| CN1725097A true CN1725097A (en) | 2006-01-25 |
| CN100428049C CN100428049C (en) | 2008-10-22 |
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| CNB2004100717006A Expired - Fee Related CN100428049C (en) | 2004-07-21 | 2004-07-21 | Monitoring device and method of optical center |
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Cited By (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101207833B (en) * | 2006-12-19 | 2010-05-19 | Tcl数码科技（深圳）有限责任公司 | Method for checking optical centre bias of lens of digital camera |
| CN102256053A (en) * | 2010-05-18 | 2011-11-23 | 鸿富锦精密工业（深圳）有限公司 | Image correcting system and method |
| CN107071400A (en) * | 2017-05-31 | 2017-08-18 | 信利光电股份有限公司 | A kind of optical centre measuring system of wide-angle imaging module |
| CN107255557A (en) * | 2017-05-02 | 2017-10-17 | 深圳大学 | A kind of optical centre detection method and device of camera |
| CN109443697A (en) * | 2018-09-29 | 2019-03-08 | 歌尔股份有限公司 | Optical centre test method, device, system and equipment |
| TWI661260B (en) * | 2018-04-17 | 2019-06-01 | 國立交通大學 | System and method for automatic calibration of principal point |
Family Cites Families (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| FR2654513B1 (en) * | 1989-11-10 | 1993-07-16 | Essilor Int | METHOD AND DEVICE FOR DETERMINING THE CHARACTERISTICS OF A LENS, AND IN PARTICULAR OF ITS POWER. |
| JPH04275534A (en) * | 1991-03-04 | 1992-10-01 | Nikon Corp | Single lens reflex camera capable of fitting electronic still adapter |
| US6628339B1 (en) * | 1999-06-14 | 2003-09-30 | Eastman Kodak Company | Image sensor mount for a digital camera |
-
2004
- 2004-07-21 CN CNB2004100717006A patent/CN100428049C/en not_active Expired - Fee Related
Cited By (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101207833B (en) * | 2006-12-19 | 2010-05-19 | Tcl数码科技（深圳）有限责任公司 | Method for checking optical centre bias of lens of digital camera |
| CN102256053A (en) * | 2010-05-18 | 2011-11-23 | 鸿富锦精密工业（深圳）有限公司 | Image correcting system and method |
| CN107255557A (en) * | 2017-05-02 | 2017-10-17 | 深圳大学 | A kind of optical centre detection method and device of camera |
| CN107071400A (en) * | 2017-05-31 | 2017-08-18 | 信利光电股份有限公司 | A kind of optical centre measuring system of wide-angle imaging module |
| TWI661260B (en) * | 2018-04-17 | 2019-06-01 | 國立交通大學 | System and method for automatic calibration of principal point |
| CN109443697A (en) * | 2018-09-29 | 2019-03-08 | 歌尔股份有限公司 | Optical centre test method, device, system and equipment |
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| CN100428049C (en) | 2008-10-22 |
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