CN201986206U - Illumination unit - Google Patents
Illumination unit Download PDFInfo
- Publication number
- CN201986206U CN201986206U CN2009210000267U CN200921000026U CN201986206U CN 201986206 U CN201986206 U CN 201986206U CN 2009210000267 U CN2009210000267 U CN 2009210000267U CN 200921000026 U CN200921000026 U CN 200921000026U CN 201986206 U CN201986206 U CN 201986206U
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- light
- emitting diode
- color
- polychrome line
- line
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Abstract
The utility model relates to an illumination unit, which comprises an optical device (i), a controller (II) and a multi-color line of a light emitting diode, wherein the optical device is positioned between the multi-color line of the light emitting diode and an electric object to be checked, and the controller is used for controlling the light emitting diode in the multi-color line of the light emitting diode on the basis of the expected color and brightness value of expected light patterns capable of being generated on a checking plane during the application, wherein the expected color and brightness value is determined on the basis of measurement results representing actual light patterns, the actual light patterns are obtained through exciting a plurality of light emitting diodes in the multi-color line of the light emitting diode, and the multi-color line of the light emitting diode is controlled by the controller and is used for illuminating the region of the electric object to be checked at least partially positioned in the checking plane.
Description
Technical field
The utility model relates to lighting unit, particularly LED-based lighting unit.
Background technology
Great majority are used for the light source of the traditional illumination system use linear extension of line sweep imaging.The linear optical fiber polychrome line transducer that combines with any external light source has been represented conventional system.Fig. 1 shows widely used and commercial affordable linear light sorurce based on optical fiber.
Light from lamp 1 passes an optics that comprises heat mirror 2 and filter wheel 3 and an end that enters fiber bundle 4.Fiber bundle comprises a plurality of optical fiber.The other end of the optical fiber in the fiber bundle is along dummy line 9 placement that is separated from each other, so that the illumination of polychrome line to be provided.Lamp power supply and power control hardware module 5 are controlled the illumination intensity of lamps 1 and are provided supply voltage for it.Which colour filter that 6 pairs on filter wheel and hardware are used in a plurality of discrete colour filters is controlled.
The utility model content
A kind of method that electric object (object) is thrown light on, this method can comprise: with the light pattern of sensor measurement reality, this light pattern is to obtain by the multi-color LED in the polychrome line of excitation luminescence diode, and the polychrome line of this light-emitting diode comprises the light-emitting diode of the light that is set to launch different colours; Determine when using, can on checking the plane, to produce the desired color and the brightness value of the light-emitting diode in the polychrome line of light-emitting diode of the light pattern of expecting; And be examined in the process of electric object in inspection, throw light on to be positioned at the checked electric subject area of checking the plane to small part by using desired color and brightness value.
A kind of method that checked electric object is thrown light on, this method can comprise: a plurality of light-emitting diodes in the polychrome line of excitation luminescence diode; At least one lighting parameter of the light pattern that measurement is formed by the polychrome line of light-emitting diode; And at least one control characteristic of at least one light-emitting diode in the polychrome line of change light-emitting diode is to provide the light pattern of expectation.
A kind of method of polychrome line of excitation luminescence diode, this method can comprise: the light pattern of determining the expectation that the polychrome line by light-emitting diode forms; And the light-emitting diode in the polychrome line of control light-emitting diode, to obtain the light pattern of expectation basically.
A kind of lighting unit, it can comprise: optics, between the polychrome line and checked electric object of light-emitting diode; Controller is used for based on can check desired color and the brightness value that produces the light pattern of expectation on the plane, the light-emitting diode in the polychrome line of control light-emitting diode when using; Wherein desired color and brightness value are based on that the measurement result of expression actual light pattern determines, this actual light pattern obtains by a plurality of light-emitting diodes in the polychrome line of excitation luminescence diode; And, be used for being thrown light in the zone that is positioned at the checked electric object of checking the plane to small part by the polychrome line of the described light-emitting diode of controller control.
Because additive color (additive) characteristic of different colours parts (they are that frequency spectrum is nonoverlapping), their linear combination only allows by selecting suitable dim factor to produce the illumination frequency spectrum of expectation.This method replaces with filter wheel mechanical device and electronic installation fully with the wide spectrum light source.In addition, the light-emitting diode of polychrome line can provide the illumination " color " of more expectations immediately, and time and money need not be spent in new " external " filter.
A kind of lighting unit comprises that the polychrome line of light-emitting diode, the polychrome line of this light-emitting diode comprise a plurality of light-emitting diodes that are set to launch the light of different colours, is characterized in that this lighting unit also comprises: the optical sensor that is used to measure actual light pattern; And the controller that is connected with light-emitting diode in the polychrome line of described optical sensor and described light-emitting diode, be used for receiving brightness and/or optical information from described optical sensor, control the light-emitting diode in the polychrome line of described light-emitting diode.Preferably, described controller is arranged for described light-emitting diode in the polychrome line of the described light-emitting diode of control to obtain the illumination of uniform luminance on the zone of checked electric object, wherein said zone is than the polychrome line length of described light-emitting diode.Preferably, the polychrome line of described light-emitting diode comprises continuous light-emitting diode and pulsed illumination diode.Preferably, each light-emitting diode is arranged to send the light of multiple color.
Description of drawings
Hereinafter with reference to accompanying drawing the more details of the present invention, scheme and embodiment are only described by way of example.In the accompanying drawings, adopt identical Reference numeral to identify identical or functionally similar element.Element in the accompanying drawing is used for simplifying and clearly explanation, and may not draw in proportion.
Fig. 1 shows the linear light sorurce based on optical fibre device of prior art.
Fig. 2 A-C shows actual according to an embodiment of the invention light pattern, the light pattern of expectation and the brightness of different light-emitting diodes respectively;
Fig. 3 shows system according to an embodiment of the invention;
Fig. 4-6 shows the method for different embodiment according to the subject invention; With
Fig. 7 A and Fig. 7 B show system according to an embodiment of the invention.
Embodiment
The polychrome line of light-emitting diode is provided.The polychrome line comprises a plurality of color LEDs (color light emitting diode), and each can send brightness and the controlled light of frequency spectrum (color).The polychrome line of light-emitting diode can be the part of automatic scan optical instrument, and this automatic scan optical instrument can be used for different industries, for example printed circuit board (PCB) industry, wafer industry, or the like.
Can measure along the brightness of the light of polychrome line and (on the plane of the inspected object) actual color that can use the brightness of the different light-emitting diodes that belong to the polychrome line to compensate and Luminance Distribution and desired color and Luminance Distribution between deviation.This measurement can comprise throws light on or even when not having inspected object transducer is thrown light on transparent object, nontransparent object.
Actual color and Luminance Distribution can be followed the optics influence of the polychrome line of light-emitting diode.For example, can control light-emitting diode luminance, to provide the lighting power profile of adjusting on the space (profile) along (the polychrome line of light-emitting diode) longer size, thereby compensating image optics edge leakage effect (edge drop-out effect), for example well-known cos^4 is low, shown in the curve among Fig. 2 A 110.
Can control the brightness of light-emitting diode 11, provide Luminance Distribution with (on the polychrome line of light-emitting diode), shown in the curve among Fig. 2 B 120.
Light brightness distribution on result-(by behind the optics) inspection plane is (flat curve)-shown in the curve among Fig. 2 C 130 uniformly.
The space and the color parameter of different light-emitting diodes can be (by controller 20) electronic programmable, and submit to calibration process.Controller 20 can be used the flat field correction algorithm.
The light-emitting diode (LEDs) 11 that forms the polychrome line 10 of light-emitting diode can be selected in the commercially available from the market light-emitting diode, and should with high light efficiency, long-life, ease of manageability and independent light-emitting diode control ability is arranged is feature.
Light-emitting diode 11 can be by controller 20 controls, and this controller 20 can receive brightness and/or optical information from optical sensor 100.
The polychrome line of light-emitting diode can have elongated shape is arranged, and can utilize continuous emission light-emitting diode, pulsed illumination diode and combination thereof.Can be in a continuous manner or with pulse mode excitation luminescence diode 11.
The brightness of light-emitting diode can be chosen as height,, thereby obtain enough optical informations with higher scan rate so that enable to have the optical sensor 100 of known sensitivity.
Can adopt Water Cooling Technology, air-cooled technology, heat dissipation element to wait and cool off light-emitting diode 11.
The polychrome line of light-emitting diode should comprise at least two kinds (and routine be 3 or 4 kind) light-emitting diode of different colours.Light-emitting diode can send the light of monochrome or polychrome.
Utilize multi-color LED can simplify the controlling schemes of light-emitting diode-because do not need to be in control the desired color of illumination from a plurality of different light-emitting diodes.
The optical characteristics of light-emitting diode can be designed to compliance with system optics (CCD, image optics device, routine or fluorescence imaging notion or the like).Each color parts can be managed independently.Carry out radiation from identical effective coverage to the combination of each color parts or any color parts.
The multi-color LED of polychrome line can be controlled light-emitting diode (light-emitting diode luminance), so that spatially uniform to be provided.The luminous flux of emission should show the uniformity of power and angular distribution on the longer size of (illumination) effective coverage, thereby all provides uniform reflection from height reflection (minute surface) and matt (diffusive matt) (lambert (Lambertian)) of diffusion surface.
Angular aperture should conform to the input digit aperture of illuminating block design, so that maximum coupling efficiency and flexibility to be provided.
The light-emitting diode of polychrome line is connected to control circuit, and control circuit can be controlled the color and the power of each light-emitting diode (or light-emitting diode group).For example, the emitting diode that the luminous power of each color parts is controlled separately, this emitting diode have the light modulation of maximum of possibility than (dynamic range).Because additive color (additive) characteristic of different colours parts (they are that frequency spectrum is nonoverlapping), their linear combination only allows by selecting suitable dim factor to produce the illumination frequency spectrum of expectation.This method replaces with filter wheel mechanical device and electronic installation fully with the wide spectrum light source.In addition, the light-emitting diode of polychrome line can provide the illumination " color " of more expectations immediately, and time and money need not be spent in new " external " filter.
Fig. 4 illustrates the method 400 that electric object is thrown light on according to the embodiment of the invention.
Step 420 is followed step 410, determines can to produce on checking the plane when using the desired color and the brightness value of the light-emitting diode in the polychrome line of light-emitting diode of the light pattern of expecting in step 420.
Step 420 can be included as at least two different light scenes and determine desired color and brightness value, and the color of described scene differs from one another.Can design different light scenes and detect dissimilar defectives.
Step 420 can also comprise determines desired color and brightness value, so that checking realization uniform power distribution and uniform angular distribution on the plane.
Step 430 is followed step 420, by adopting desired color and brightness value, during the inspection of checked electric object, is thrown light in the zone that is positioned at the checked electric object of checking the plane at least in part in this step.
Described illumination can be used continuous light-emitting diode and the pulsed illumination diode in the polychrome line of light-emitting diode.
Described illumination can utilize the polychrome line of light-emitting diode when the color that each light-emitting diode of control sends, wherein each light-emitting diode is set to send the light of multiple color.
Step 430 can comprise and adopt desired color and brightness value so that on checked electric subject area, obtain the illumination of uniform luminance, wherein should the zone than the polychrome line length of light-emitting diode.The application of desired color and brightness value compensates the heterogeneity of the transfer function of optics, and this optics is between the polychrome line and checked electric object of light-emitting diode.
Step 420 can comprise determines to send the dim factor of color radiation with the different light-emitting diode in the polychrome line that the light-emitting diode of expecting light pattern is provided.
Repeatedly repeating step 430, so that the zones of different of checked electric object is thrown light on and imaging.This may relate to respect to optics and moves electric inspected object.
Fig. 5 shows according to an embodiment of the invention by the throw light on method 500 of checked electric object of the multi-color LED in the excitation polychrome line.
Method 500 is with step 510 beginning of a plurality of light-emitting diodes in the excitation multi-color LED line.
Step 520 is followed step 510, measures at least one lighting parameter (brightness and/or color) of the light pattern that the polychrome line by light-emitting diode forms in step 520.
Step 530 is followed step 520, changes at least one control characteristic (brightness of illumination, the color of selection) of the light-emitting diode in the polychrome line in step 530, so that the light pattern of expectation to be provided.
Fig. 6 shows the method 600 of the polychrome line that is used for the excitation luminescence diode according to an embodiment of the invention.
The step 610 of the light pattern of the expectation that method 600 forms with the polychrome line of determining by light-emitting diode (in Luminance Distribution, color or aspect both) begins.Step 620 is followed step 610, and the light-emitting diode in step 620 in the polychrome line of control light-emitting diode is to obtain the light pattern of expectation basically.
System 710 and 720 and provide by the example of the image outline of the indication in the zone of the polychromatic light of light-emitting diode illumination are provided respectively for Fig. 7 A and Fig. 7 B.
System 710 comprises the polychrome line of the light-emitting diode that the catoptrical diffuse reflection object of subtend optics throws light on, and described optics comprises object lens and line camera.The zone of being thrown light on is a rectangle-shown in the profile on the system 710.
System 720 comprises the polychrome line of the light-emitting diode that the catoptrical direct reflection object of subtend optics throws light on, and described optics comprises object lens and line camera.The zone of being thrown light on is not a rectangle-shown in the profile on the system 720.
In the above description, the specific examples with reference to embodiments of the invention is described invention.Yet, under the situation that does not deviate from the wideer spirit and scope that the present invention illustrates in appending claims, obviously can make various distortion and change.
Those of skill in the art will recognize that the border between the box only is illustrative, and alternative can merge box or circuit element or Different Logic frame or circuit element are carried out alternative Function Decomposition.
Claims (4)
1. lighting unit comprises that the polychrome line of light-emitting diode, the polychrome line of this light-emitting diode comprise a plurality of light-emitting diodes that are set to launch the light of different colours, is characterized in that this lighting unit also comprises:
Be used to measure the optical sensor of actual light pattern; And
The controller that is connected with light-emitting diode in the polychrome line of described optical sensor and described light-emitting diode is used for receiving brightness and/or optical information from described optical sensor, controls the light-emitting diode in the polychrome line of described light-emitting diode.
2. lighting unit according to claim 1, it is characterized in that, described controller is arranged for described light-emitting diode in the polychrome line of the described light-emitting diode of control to obtain the illumination of uniform luminance on the zone of checked electric object, wherein said zone is than the polychrome line length of described light-emitting diode.
3. lighting unit according to claim 1 is characterized in that, the polychrome line of described light-emitting diode comprises continuous light-emitting diode and pulsed illumination diode.
4. lighting unit according to claim 1 is characterized in that, each light-emitting diode is arranged to send the light of multiple color.
Applications Claiming Priority (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| US12243708P | 2008-12-15 | 2008-12-15 | |
| US61/122,437 | 2008-12-15 |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN201986206U true CN201986206U (en) | 2011-09-21 |
Family
ID=44613655
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN2009210000267U Expired - Lifetime CN201986206U (en) | 2008-12-15 | 2009-12-15 | Illumination unit |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN201986206U (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN113438775A (en) * | 2021-06-04 | 2021-09-24 | 佛山喀视科技有限公司 | System for calibrating brightness and color temperature attenuation of tile light source |
-
2009
- 2009-12-15 CN CN2009210000267U patent/CN201986206U/en not_active Expired - Lifetime
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN113438775A (en) * | 2021-06-04 | 2021-09-24 | 佛山喀视科技有限公司 | System for calibrating brightness and color temperature attenuation of tile light source |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| TR01 | Transfer of patent right |
Effective date of registration: 20180912 Address after: Hongkong, Tongluowan, China Patentee after: Kang Dai image technology program Limited Hong Kong Company Address before: Israel Haman Mead Patentee before: Camtek Ltd. |
|
| TR01 | Transfer of patent right | ||
| CX01 | Expiry of patent term |
Granted publication date: 20110921 |
|
| CX01 | Expiry of patent term |