CN104949752A - Light source illumination auxiliary test device - Google Patents
Light source illumination auxiliary test device Download PDFInfo
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- CN104949752A CN104949752A CN201410126909.1A CN201410126909A CN104949752A CN 104949752 A CN104949752 A CN 104949752A CN 201410126909 A CN201410126909 A CN 201410126909A CN 104949752 A CN104949752 A CN 104949752A
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- light source
- worktable
- test unit
- exiting surface
- auxiliary test
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Abstract
The present invention discloses a light source illumination auxiliary test device which comprises a support assembly which is used for supporting and fixing a light source and comprises a base, a telescopic rod and a working table. The telescopic rod is fixed on the base and can expand and contract up and down. The working table is fixedly connected to one end of the telescopic rod far from the base and is used for placing the light source. The light source comprises a light emitting surface, a projection surface which is far from the light source and is parallel to the light emitting surface and is used for projecting the light spot of the light emitting surface, an infrared range finder which is installed on the working table and is used for testing the distance from the light emitting surface to the light spot, and a laser indicator which is installed on the working table and is far from the infrared range finder and is used for marking the geometric center of the light spot. The geometric center illumination test of the light source and the geometric center circumferential side equidistant point illumination test of the light source are realized, thus light source average illumination is calculated, and the effects of an accurate, simple and reliable test is realized.
Description
Technical field
The present invention relates to test of light source field, particularly relate to a kind of light illumination auxiliary test unit.
Background technology
For portable lamp, the size of brightness value and the uniformity coefficient of hot spot are then weigh an important indicator of lamp lighting quality, illuminance of lamp test is that how far, distance brightness value reaches the setting that client needs according to customer requirement light fixture, this is comprising the illumination maximal value of illuminance of lamp, spot diameter, the uniformity coefficient of average illumination and light spot illumination.
Traditional test illumination process is in a dark place, ensures that background illuminance is less than 0.21ux, is placed on by light fixture on desk; Then going the distance measuring light fixture distance metope with tape measure or tape measure, after distance is adjusted, the center illumination of test light fixture, is also the distance needing to test light fixture centre distance ground, but must ensures that bottom surface is smooth; Then the height value on light fixture distance ground is tested out on the wall; The central point finding out light fixture according to the vertical height on light fixture central horizontal irradiation distance and light fixture center and ground again identifies; After testing out central point, light fixture is lighted and is radiated on metope, adopt illuminometer test maximal illumination, the equidistant brightness value of center illumination and illumination both sides, center; The point test illumination of same distance is got again according to central point both sides, then average illumination value.
All need two people to coordinate in this test process can complete, such testing efficiency is low, and test data is inaccurate.
Summary of the invention
The object of the present invention is to provide the accurate light illumination auxiliary test unit of a kind of test.
In order to solve the problems of the technologies described above, the invention provides a kind of light illumination auxiliary test unit, it comprises: supporting component, for supporting and fixed light source, it comprises base, expansion link and worktable, and described expansion link is fixed on described base, and can stretch up and down, described worktable is fixedly connected with described expansion link away from described base one end, and described table surface is for placing described light source, and described light source comprises exiting surface;
Projecting plane, away from described light source, is parallel to described exiting surface, for the hot spot of the described exiting surface that projects out;
Infrared ambulator, is installed on described worktable, for testing the distance of described exiting surface to described hot spot;
Laser designator, is installed on described worktable, and away from described infrared ambulator, for marking described hot spot geometric center.
Wherein, described laser designator is slidably connected described worktable, and the parallel described exiting surface of glide direction, do near or slide away from described light source geometric center illuminated line, described laser designator is positioned at described exiting surface emission side, projecting plane described in vertical irradiation.
Wherein, described worktable edge is provided with slide block, and described slide block is fixedly connected with described laser designator, and described slide block is provided with the chute that vertical direction extends, inserting bolt in described chute, described bolt is bolted in described worktable edge.
Wherein, described light illumination auxiliary test unit also comprises miniature laser pen, and described miniature laser pen is installed on described worktable, for marking described hot spot away from described base a bit.
Wherein, described worktable boundary slip connects a slide bar, and described sliding bar direction and the identical setting of described laser designator glide direction, described slide bar is fixedly connected with described miniature laser pen away from described base one end.
Wherein, described light illumination auxiliary test unit also comprises slide plate, and described slide plate slides is connected to described worktable edge, and described slide plate xsect is parallel to described exiting surface and setting of vertically sliding.
Wherein, described worktable edge is provided with the bolt slot vertically extended, and arranges screw in described bolt slot, and described screw is fixedly connected with described slide plate.
Wherein, described slide plate arranges hook, described hook hangs with horizontal checkout instrument, and described horizontal checkout instrument is for testing the angle of described exiting surface and surface level, and the angle of described projecting plane and surface level.
Wherein, described worktable is provided with light source deck, described light source deck is used for light source described in support, described worktable is bolted with set screw, described set screw one end is through described table surface, and for against described light source away from exiting surface one end, regulate described set screw, to regulate the upset of described exiting surface relatively described projecting plane.
Wherein, described projecting plane is metope.
Described light illumination auxiliary test unit of the present invention, by the height of expansion link adjustment light source distance bottom surface; By the distance on infrared ray tester adjustment light source distance projecting plane; And by the parallel described exiting surface in described projecting plane and the vertical described projecting plane of described laser designator irradiate, to find the geometric center of hot spot accurately.Realize the test of light source geometric center illumination, and the side equidistant points illumination test of light source geometric center week, thus calculate light source average illumination, reach test accurately, simple and reliable effect.
Accompanying drawing explanation
In order to be illustrated more clearly in technical scheme of the present invention, be briefly described to the accompanying drawing used required in embodiment below, apparently, accompanying drawing in the following describes is only some embodiments of the present invention, for those of ordinary skill in the art, under the prerequisite not paying creative work, other accompanying drawing can also be obtained according to these accompanying drawings.
Fig. 1 is the schematic diagram of light illumination auxiliary test unit;
Fig. 2 is the schematic diagram of the light illumination auxiliary test unit of Fig. 1.
Embodiment
Below in conjunction with the accompanying drawing in embodiment of the present invention, the technical scheme in embodiment of the present invention is clearly and completely described.
See also Fig. 1 and Fig. 2, a kind of light illumination auxiliary test unit 100 that embodiment of the present invention provides, described light illumination auxiliary test unit 100 comprises supporting component 10, projecting plane (not shown) and test suite 20.By described supporting component 10 supporting light sources (not shown), and light source distance floor level can be regulated, the whole hot spot of light source is projected on described projecting plane completely; And utilize described test suite 20 to comprise infrared ambulator 21, realize described light source to the distance test on projecting plane, and utilize described test suite 20 to comprise laser designator 22, to mark the hot spot geometric center of described light source, realize testing the geometric center illumination of light source; And utilize hot spot geometric center position can also test the illumination of the equidistant luminous point in hot spot geometric center week side, thus achieve the illumination subtest of light source, reach simple and reliable effect.
Described supporting component 10 comprises base 11, expansion link 12 and worktable 13.Described base 11 is square plate, is positioned on ground.Described expansion link 12, is fixed on described base 11, and can vertically stretches up and down, thus regulates described expansion link 12 length.Described expansion link 12 is provided with holding screw 12a, locks described holding screw 12a, can secure the above expansion link 12, makes it no longer flexible, realizes described expansion link 12 and is adjusted to preset length.
Described worktable 13 is fixed on described expansion link 12 away from described base 11 one end.Described worktable 13 table top places described light source and infrared ambulator 21.Concrete, described worktable 13 is a square plate, and described worktable 13 table top opposite side is fixedly connected with described expansion link 12, and along with described expansion link 12 is adjusted to preset length, described worktable 13 can move up and down and be adjusted to preset height.Described worktable 13 table top is fixedly connected with described infrared ambulator 21, described worktable 13 table top is fixedly connected with a light source deck 131 near described infrared ambulator 21 place.
Described light source deck 131 is near an edge of described worktable 13, and described light source deck 131 is in boss-shaped.In present embodiment, described light source deck 131 arranges arc depression 131a away from the end face of described worktable 13 table top, light source described in described arc depression 131a support.Certainly, in other embodiments, described light source deck can also arrange fixture, and described light source deck clamps described light source.
Described workbench 13 is provided with levelling bolt 132 away from described light source deck 131 place, and described levelling bolt 132 is used in combination with described light source deck 131.Concrete, described worktable 13 is spirally connected in described light source deck 131 side described levelling bolt 132.Vertical described worktable 13 table top of described set screw 132 length direction, described set screw 132 one end through described worktable 13 table top, and is resisted against described light source away from described light source deck 131 one end.Described set screw 132 welds one piece of leveling board 132a against described light source one end.Described leveling board 132a is against described light source.Rotate described levelling bolt 132, the relatively described worktable 13 of described levelling bolt 132 can be realized move up and down, thus drive described leveling board 132a to move up and down, and then promote described light source one end and rotate around described light source deck 131, reach and regulate the geometric center illuminated line of described light source and the effect of horizontal plane angle.When described light source geometric center illuminated line and horizontal plane angle are equal with horizontal plane angle with described exiting surface, just can realize described light source geometric center illuminated line can vertical irradiation to described projecting plane, and then reach the accuracy of described light illumination test.
Described light source is positioned on described worktable 13, and irradiation light is to described projecting plane.In present embodiment, described light source is conventional electric torch.Concrete, described light source comprises exiting surface (not shown).Described exiting surface is rounded, and described exiting surface sends irradiation light, thus at described projecting plane projection glossing up.Utilize illumination tester to get a little on described hot spot, thus test the illumination of described light source.Due to the vertical described exiting surface of described light source geometric center illuminated line, described exiting surface is regulated to parallel with described projecting plane, namely the vertical described projecting plane of illuminated line in described light source geometry is realized, and then described light source is projected out circular light spot on described projecting plane, thus conveniently test out the geometric center illumination of described light source, and the illumination that around described light source geometric center, other are put.Certainly, in other embodiments, described light source can also be any one of bulb, fluorescent light or LED lamp panel, and described exiting surface can also be square, triangle or pentagonal arbitrary shape.
Described infrared ambulator 21 is fixed on described worktable 13 table top, and is positioned at described light source side.Concrete, the infrared emitting direction of described infrared ambulator 21 and the direction of illumination of described light source be arranged in parallel, the infrared emitting end of described infrared ambulator 31 is mutually concordant with described exiting surface simultaneously, thus measure the distance of exiting surface to described projecting plane of described light source accurately, and utilize the digital display module of described infrared ambulator 21 directly can read distance values, save time, easy to use.
In present embodiment, described projecting plane is metope, ensure that the vertical of projecting plane and surface level, saves the time of the described projecting plane of test and horizontal plane angle, and then also ensure that the accuracy of described test of light source illumination.Described in described light source irradiation during projecting plane, described projecting plane projects out the circular light spot of described light source.Certainly, in other embodiments, described projecting plane can also be the one side of rectangle plate, now, if non-vertical direction, described projecting plane is arranged, then needs the angle testing described projecting plane and surface level, to ensure the parallel of described projecting plane and described exiting surface; If the exiting surface of described light source is square, then described projecting plane can also project out square focus spot.
Described laser designator 22 is installed on described worktable 13, away from described infrared ambulator 21, and for marking described hot spot geometric center.Concrete, described laser designator 22 sends linearly extended light, and vertical irradiation is to described projecting plane.Described laser designator 22 is positioned at described exiting surface emission side, and when described exiting surface geometric center place of aliging exposes to described projecting plane, just can mark described hot spot geometric center.Meanwhile, described exiting surface geometric center position comparatively will conveniently be found in described hot spot geometric center position, realizes described laser designator 22 and can mark described hot spot geometric center accurately.More specifically, described laser designator 22 is slidably connected described workbench 13, and can do near along parallel described exiting surface direction or slide away from described light source geometric center illuminated line, described hot spot edge can be marked to realize described laser designator away from during described light source geometric center illuminated line, thus measure described hot spot edge brightness value; Can also mark simultaneously and multiplely between described hot spot geometric center to edge equidistantly distribute a little, according to described hot spot geometric center illumination, multiplely equidistantly distribute the average illumination that illumination a little and edge illumination can calculate described hot spot.
In present embodiment, described laser designator 22 is fixed on slide block 221, and described slide block 221 is slidably connected to described worktable 13 edge, arranges near described light source deck 131.Concrete, described worktable 13 is provided with bolt 222 at the edge near described light source deck 131, and described slide block 221 is provided with the chute 221a that corresponding described bolt 222 passes, and described chute 221a vertically extends.Described laser designator 22 is driven vertically to do near or slide away from described light source geometric center lines to realize described slide block 221, thus can hot spot geometric center described in mark, and described hot spot edge is near described base a bit.Certainly, in other embodiments, described laser designator can also be fixed on slide bar, and described slide bar length direction extends in the horizontal direction, and arranges through the relatively described light source deck slip of a rectangular block; Or described laser designator is installed on electric expansion bar, described workbench is fixed in described electric expansion bar one end, and the other end vertically relatively described light source stretches.
In present embodiment, described test suite 20 also comprises miniature laser pen 23, and described miniature laser pen 23 is installed on described worktable 13, away from described laser designator 22, for marking described hot spot away from described base a bit, namely mark the peak of described hot spot opposing bottom surface.Concrete, described worktable 13 boundary slip connects a slide bar 231, described slide bar 231 glide direction and the identical setting of described laser designator 22 glide direction.Namely described slide bar 231 length direction vertically extends, and described slide bar 231 is through a rectangular block 232, and described rectangular block 232 is arranged at described worktable 13 edge, and relatively described slide block 221a is arranged.To realize described miniature laser pen 23 with described laser designator 22 in same plane of movement, can cooperatively interact, mark the highs and lows on the relative ground of described hot spot respectively, and then correct the geometric center of described hot spot more accurately.Certainly, in other embodiments, described miniature laser pen can also be fixed on slide block, and described skid is connected in the chute of described worktable; Or described miniature laser pen can also be installed on screw rod, described spiro rod length direction horizontal-extending, and install on described worktable, rotate described screw rod can realize described miniature laser pen and move back and forth along described spiro rod length direction, and then mark described hot spot edge and geometric center point.
Described test suite 20 is except measuring described light source to projecting plane distance, and mark described hot spot geometric center, described test suite 20 also comprises horizontal checkout instrument 24, described horizontal checkout instrument 24 is for testing the angle of described exiting surface and surface level, and the angle of described projecting plane and surface level.Described horizontal checkout instrument 24 is installed on described workbench 13.Concrete, relatively described slide block 221 place, described workbench 13 edge is provided with bolt slot 241, and described bolt slot 241 vertically extends.Described bolt slot 241 slidably connects bolt 242.Described bolt 242 is fixedly connected with slide plate 243 away from described worktable 13 one end, vertically to slide setting to realize described slide plate 243.Described slide plate 243 xsect is parallel to described exiting surface, makes described light source when length exposes described workbench, described slide plate 243 can be slided near described base 11, avoid the installation interfering described light source.In present embodiment, described slide plate 243 is fixedly connected with described rectangular block 232 away from described worktable one side, and certainly, in other embodiments, can also need not arrange described slide plate, described rectangular block is directly fixed on described worktable edge.
Meanwhile, described plate 243 is provided with hook (not shown), described level meter is hung on described hook.When needs test described projecting plane and horizontal plane angle, and when testing described exiting surface and horizontal plane angle, described level meter 24 is taken off from described hook; At the described projecting plane of measurement and described horizontal plane angle, time identical with horizontal plane angle with described exiting surface, namely ensure that described projecting plane parallels with described exiting surface, described level meter 24 is hung on hook, to realize using at any time, save time; If test described projecting plane and described exiting surface not parallel time, then need to regulate described levelling bolt 132, until described exiting surface parallels with described projecting plane.In present embodiment, described level meter is PRO360 level meter, and certainly, in other embodiments, described level meter can also be laser leveler or air-bubble level.Certainly, described level meter can also be directly hang and described worktable edge.
Described light illumination auxiliary test unit of the present invention, by the height of expansion link adjustment light source distance bottom surface; By the distance on infrared ray tester adjustment light source distance projecting plane; And by the parallel described exiting surface in described projecting plane and the vertical described projecting plane of described laser designator irradiate, to find the geometric center of hot spot accurately.Realize the test of light source geometric center illumination, and the side equidistant points illumination test of light source geometric center week, thus calculate light source average illumination, reach test accurately, simple and reliable effect.
The above is the preferred embodiment of the present invention; it should be pointed out that for those skilled in the art, under the premise without departing from the principles of the invention; can also make some improvements and modifications, these improvements and modifications are also considered as protection scope of the present invention.
Claims (10)
1. a light illumination auxiliary test unit, is characterized in that, it comprises:
Supporting component, for supporting and fixed light source, it comprises base, expansion link and worktable, described expansion link is fixed on described base, and can stretch up and down, described worktable is fixedly connected with described expansion link away from described base one end, and described table surface is for placing described light source, and described light source comprises exiting surface;
Projecting plane, away from described light source, is parallel to described exiting surface, for the hot spot of the described exiting surface that projects out;
Infrared ambulator, is installed on described worktable, for testing the distance of described exiting surface to described hot spot;
Laser designator, is installed on described worktable, and away from described infrared ambulator, for marking described hot spot geometric center.
2. light illumination auxiliary test unit according to claim 1, it is characterized in that, described laser designator is slidably connected described worktable, and the parallel described exiting surface of glide direction, do near or slide away from described light source geometric center illuminated line, described laser designator is positioned at described exiting surface emission side, projecting plane described in vertical irradiation.
3. light illumination auxiliary test unit according to claim 2, it is characterized in that, described worktable edge is provided with slide block, described slide block is fixedly connected with described laser designator, described slide block is provided with the chute that vertical direction extends, inserting bolt in described chute, described bolt is bolted in described worktable edge.
4. light illumination auxiliary test unit according to claim 2, is characterized in that, described light illumination auxiliary test unit also comprises miniature laser pen, and described miniature laser pen is installed on described worktable, for marking described hot spot away from described base a bit.
5. light illumination auxiliary test unit according to claim 4, it is characterized in that, described worktable boundary slip connects a slide bar, described sliding bar direction and the identical setting of described laser designator glide direction, described slide bar is fixedly connected with described miniature laser pen away from described base one end.
6. light illumination auxiliary test unit according to claim 1, it is characterized in that, described light illumination auxiliary test unit also comprises slide plate, and described slide plate slides is connected to described worktable edge, and described slide plate xsect is parallel to described exiting surface and setting of vertically sliding.
7. light illumination auxiliary test unit according to claim 6, is characterized in that, described worktable edge is provided with the bolt slot vertically extended, and arranges screw in described bolt slot, and described screw is fixedly connected with described slide plate.
8. light illumination auxiliary test unit according to claim 7, it is characterized in that, described slide plate arranges hook, and described hook hangs with horizontal checkout instrument, described horizontal checkout instrument is for testing the angle of described exiting surface and surface level, and the angle of described projecting plane and surface level.
9. light illumination auxiliary test unit according to claim 8, it is characterized in that, described worktable is provided with light source deck, described light source deck is used for light source described in support, described worktable is bolted with set screw, described set screw one end through described table surface, and for against described light source away from exiting surface one end, regulate described set screw, to regulate the relatively described projecting plane upset of described exiting surface.
10. light illumination auxiliary test unit according to claim 1, is characterized in that, described projecting plane is metope.
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| Application Number | Priority Date | Filing Date | Title |
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| CN201410126909.1A CN104949752B (en) | 2014-03-29 | 2014-03-29 | Light illumination auxiliary test unit |
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| CN201410126909.1A CN104949752B (en) | 2014-03-29 | 2014-03-29 | Light illumination auxiliary test unit |
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| CN104949752A true CN104949752A (en) | 2015-09-30 |
| CN104949752B CN104949752B (en) | 2018-05-25 |
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN108760240A (en) * | 2018-06-27 | 2018-11-06 | 上海中医药大学 | A kind of detection method and device of tcm inspection instrument acquisition light path illuminance uniformity |
| CN108844625A (en) * | 2018-07-11 | 2018-11-20 | 商洛市虎之翼科技有限公司 | A kind of auxiliary device of luminance detection |
Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH09264781A (en) * | 1996-03-27 | 1997-10-07 | Matsushita Electric Ind Co Ltd | Apparatus and method for measuring luminous intensity distribution characteristics |
| CN200979488Y (en) * | 2006-11-28 | 2007-11-21 | 刘柯 | A light source illumination distribution measurement imaging system |
| CN101608948A (en) * | 2008-06-20 | 2009-12-23 | 鸿富锦精密工业（深圳）有限公司 | Be used to measure the method for illuminance of lamp |
| CN202928689U (en) * | 2012-11-30 | 2013-05-08 | 海洋王（东莞）照明科技有限公司 | Portable tool for rapid detection of lamp illumination |
-
2014
- 2014-03-29 CN CN201410126909.1A patent/CN104949752B/en active Active
Patent Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH09264781A (en) * | 1996-03-27 | 1997-10-07 | Matsushita Electric Ind Co Ltd | Apparatus and method for measuring luminous intensity distribution characteristics |
| CN200979488Y (en) * | 2006-11-28 | 2007-11-21 | 刘柯 | A light source illumination distribution measurement imaging system |
| CN101608948A (en) * | 2008-06-20 | 2009-12-23 | 鸿富锦精密工业（深圳）有限公司 | Be used to measure the method for illuminance of lamp |
| CN202928689U (en) * | 2012-11-30 | 2013-05-08 | 海洋王（东莞）照明科技有限公司 | Portable tool for rapid detection of lamp illumination |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN108760240A (en) * | 2018-06-27 | 2018-11-06 | 上海中医药大学 | A kind of detection method and device of tcm inspection instrument acquisition light path illuminance uniformity |
| CN108760240B (en) * | 2018-06-27 | 2024-04-09 | 上海合参智能医疗科技有限公司 | Detection method and device for uniformity of illumination of acquisition light path of traditional Chinese medicine inspection instrument |
| CN108844625A (en) * | 2018-07-11 | 2018-11-20 | 商洛市虎之翼科技有限公司 | A kind of auxiliary device of luminance detection |
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| CN104949752B (en) | 2018-05-25 |
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