CN102322839B - Device and method for measuring light emergent angle of optical virtual light source - Google Patents
Device and method for measuring light emergent angle of optical virtual light source Download PDFInfo
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- CN102322839B CN102322839B CN 201110159633 CN201110159633A CN102322839B CN 102322839 B CN102322839 B CN 102322839B CN 201110159633 CN201110159633 CN 201110159633 CN 201110159633 A CN201110159633 A CN 201110159633A CN 102322839 B CN102322839 B CN 102322839B
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Abstract
The invention relates to a device and method for measuring a light emergent angle of an optical virtual light source. The method comprises the following steps of: defining a light beam center according to a connecting line between a light source center and a diaphragm center; arranging a screen board of which the shape is similar to that of the light source in the diaphragm center as a reference body; positioning the light beam center according to the observed symmetry between the light source and the screen board; improving the precision of the light beam center by adopting the observed slit; and calculating the angle of the light beam center according to the distances between the slit and a guide rail, which are measured by two times. The invention has the advantages of reasonable design, simple structure, convenience for operation, less independence on ambient environment during use, strong practicability and capability of better providing real-time field high-precision measurement during measurement of light emergent angles of large-structure and large-size light sources.
Description
Technical field
The present invention relates to a kind of measuring technology, particularly a kind of measurement mechanism of light emergent angle of optical virtual light source and method.
Background technology
Light source is one of the most frequently used equipment of optical field, in different application scenarios, its characteristic and parameter is had different requirements.In the situation that some are special, can use some structures and volume larger, and have the light source of definite rising angle.In order to reduce the physical size of light source, can utilize optical means, actual light source is imaged in distant location to satisfy required requirement than macrostructure.The general structure of this light source is that actual light source is become a certain size the virtual image at distant location by optical system, and the light that it sends forms the light beam with definite rising angle through being positioned at the diaphragm outgoing of light source exiting surface.So-called light source rising angle refers to that here light source sends the sensing of center line in three dimensions of light beam.This light source with definite rising angle all has certain requirement to its rising angle at work.Therefore, need to there be corresponding measuring method and device that it is detected.For the detection of angle, in classic method, can the use angle sensor, it is rigidly fixed on the light source external structure, and guarantees that its central axis with the light source physical arrangement is parallel, represent the rising angle of light source with the reading of this angular transducer.But the just angle of the central axis of light source physical arrangement measured of angular transducer at this moment is not equal to the angle of the light beam that light source sends, and is distinct between the two.And the difference between the two is usually also outline.Obviously, due to direct aligned bundle center, this method could not reasonably be dealt with problems.Another method is used illuminometer, and the varying cross-section on the light beam light direction is measured the position of light intensity maximum of points or hot spot geometric center point, represents the trend of the light beam that light source sends with the line of these points.But still there are several more serious practical problemss here, the one, no matter be the line of using the light intensity maximum of points, or the line of hot spot geometric center point represents the trend of light beam, all has sizable uncertainty, poor repeatability, error is large, is difficult to guarantee measuring accuracy; The 2nd, use the measurement of illuminometer to require to carry out in the environment of darkroom as far as possible, to reduce the veiling glare impact, this condition can not satisfy the requirement that real-time on-site is measured; The 3rd, when larger, the measuring distance of requirement is often far away, is subjected to the impact of light intensity decreasing at the structure of light source and volume, and illuminometer can't work.Also have other angle measurement method and device commonly used, but all can't locate accurately and accurate the measurement the rising angle of this optic virtual light source.
Summary of the invention
The present invention be directed at present and can't propose a kind of measurement mechanism and method of light emergent angle of optical virtual light source to the accurate problem of measuring of light emergent angle of optical virtual light source, solve light emergent angle of optical virtual light source and accurately measure problem.
Technical scheme of the present invention is: a kind of measurement mechanism of light emergent angle of optical virtual light source, actual light source is imaginary light source by optical system imaging, outgoing after diaphragm, described measurement mechanism comprises shadow shield, guide rail and slit, shadow shield is positioned at the diaphragm center of light source, and guide rail is coplanar in measurement point position and measured angle, and slit is positioned on guide rail, direction is vertical with guide rail, can be free to slide along guide rail.
The same light source of described shadow shield shape, its size is determined by following requirement: namely shadow shield should be less than the subtended angle of imaginary light source to observation station to the subtended angle of observation station.
A kind of measuring method of light emergent angle of optical virtual light source comprises the measurement mechanism of light emergent angle of optical virtual light source, and actual light source is imaginary light source by optical system imaging, outgoing after diaphragm; Fixedly shadow shield is in the diaphragm center; In the measured angle the same face, fixed guide along the guide rail travelling slit, and is observed imaginary light source in the position 1 from slit, and when observing imaginary light source when the shadow shield symmetria bilateralis distributes, fixed slit records the position of slit on guide rail; Moving guide rail is observed imaginary light source when the shadow shield symmetria bilateralis distributes equally to position 2, records the position of slit on guide rail; If when measuring for twice, the displacement of guide rail is X, the difference of the position of slit on guide rail is Y, so, in the measured angle plane, take perpendicular to the guide rail direction as benchmark, the rising angle of this optic virtual light source is arc tangent arctan (Y/X).
Beneficial effect of the present invention is: the measurement mechanism of light emergent angle of optical virtual light source of the present invention and method, reasonable in design, simple in structure, easy to operate, dependence to surrounding environment during use is little, practical, when measuring, the rising angle of macrostructure large scale light source more can provide the high-acruracy survey of real-time on-site.
Description of drawings
Fig. 1 is the measuring method schematic diagram of light emergent angle of optical virtual light source of the present invention;
Fig. 2 is the measuring method schematic diagram of light emergent angle of optical virtual light source of the present invention;
Fig. 3 is guide rail in the measurement mechanism of light emergent angle of optical virtual light source of the present invention and the structural representation of slit;
Fig. 4 is the measurement observing effect schematic diagram of light emergent angle of optical virtual light source of the present invention.
Embodiment
Be as depicted in figs. 1 and 2 the measuring method principle schematic of light emergent angle of optical virtual light source of the present invention, actual light source 1 is imaginary light source 2 by optical system imaging, outgoing after diaphragm 3.Fixedly shadow shield 4 is in diaphragm 3 centers; In the measured angle the same face, fixed guide 5 is in the position 1.Along guide rail 5 travelling slits 6, and observe imaginary light source 2 from slit 6, when observing imaginary light source 2 when shadow shield 4 symmetria bilateralis distribute, fixed slit 6 records the position of slit 6 on guide rail 5.Moving guide rail 5 is observed imaginary light source 2 when shadow shield 4 symmetria bilateralis distribute equally to position 2, records the position of slit 6 on guide rail 5.If when measuring for twice, the displacement of guide rail 5 is X, the difference of the position of slit 6 on guide rail 5 is Y, so, in the measured angle plane, take perpendicular to the guide rail direction as benchmark, the rising angle of this optic virtual light source is arc tangent arctan (Y/X).
Be measurement mechanism structural representation and the observing effect schematic diagram of light emergent angle of optical virtual light source as Fig. 3,4, structure is by shadow shield 4, and guide rail 5 and slit 6 consist of.Shadow shield 4 is positioned at diaphragm 3 centers, and shape is similar to light source 1, and its size is definite by following requirement: namely the subtended angle of 4 pairs of observation stations of shadow shield should be less than the subtended angle of 2 pairs of observation stations of imaginary light source; Guide rail 5 is coplanar in measurement point position and measured angle, and length and measurement point position and imaginary light source 2 angles are complementary; Slit 6 is positioned on guide rail 5, direction is vertical with guide rail 5, can be free to slide along guide rail 5, the length of slit 6 and width and measurement point position and observation sight line are complementary, human eye sees through slit and observes, when sight line was aimed at the diaphragm center with light source center, beam center was positioned, and can observe the effect of Fig. 4.
The present invention is with the definition of the line between light source center and diaphragm center beam center; The shape shadow shield similar to light source is set as the reference body at the diaphragm center; Come the aligned bundle center according to the symmetry of the light source that observes and shadow shield; Adopt the observation slit to improve the precision at aligned bundle center; Calculate the angle of beam center according to the distance between slit and between guide rail in twice measurement, method is practical simple.
Claims (3)
1. the measurement mechanism of a light emergent angle of optical virtual light source, actual light source (1) is imaginary light source (2) by optical system imaging, outgoing after diaphragm (3), it is characterized in that, described measurement mechanism comprises shadow shield (4), guide rail (5) and slit (6), and shadow shield (4) is positioned at diaphragm (3) center, guide rail (5) is coplanar in measurement point position and measured angle, slit (6) is positioned on guide rail (5), and direction is vertical with guide rail (5), can be free to slide along guide rail (5).
2. the measurement mechanism of light emergent angle of optical virtual light source according to claim 1, it is characterized in that, the same light source of described shadow shield (4) shape (1), its size is determined by following requirement: shadow shield (4) should be less than the subtended angle of imaginary light source (2) to observation station to the subtended angle of observation station.
3. the measuring method of the light emergent angle of optical virtual light source that installs as claimed in claim 1 of a utilization, is characterized in that, actual light source (1) is imaginary light source (2) by optical system imaging, outgoing after diaphragm (3); Fixedly shadow shield (4) is in diaphragm (3) center; In the measured angle the same face, fixed guide (5) is in the position 1, along guide rail (5) travelling slit (6), and observe imaginary light source (2) from slit (6), when observing imaginary light source (2) when shadow shield (4) symmetria bilateralis distributes, fixed slit (6) records the position of slit (6) on guide rail (5); Moving guide rail (5) is observed imaginary light source (2) when shadow shield (4) symmetria bilateralis distributes equally to position 2, records the position of slit (6) on guide rail (5); If when measuring for twice, the displacement of guide rail (5) is X, the difference of the position of slit (6) on guide rail (5) is Y, so, and in the measured angle plane, take perpendicular to the guide rail direction as benchmark, the rising angle of this optic virtual light source is arc tangent arctan (Y/X).
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| Application Number | Priority Date | Filing Date | Title |
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| CN 201110159633 CN102322839B (en) | 2011-06-15 | 2011-06-15 | Device and method for measuring light emergent angle of optical virtual light source |
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| CN 201110159633 CN102322839B (en) | 2011-06-15 | 2011-06-15 | Device and method for measuring light emergent angle of optical virtual light source |
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| CN102322839A CN102322839A (en) | 2012-01-18 |
| CN102322839B true CN102322839B (en) | 2013-05-22 |
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| CN 201110159633 Expired - Fee Related CN102322839B (en) | 2011-06-15 | 2011-06-15 | Device and method for measuring light emergent angle of optical virtual light source |
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| Publication number | Priority date | Publication date | Assignee | Title |
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| CN104019963B (en) * | 2014-05-28 | 2017-02-22 | 上海理工大学 | Plane light source virtual image distance measurement device and method thereof |
| WO2020029178A1 (en) * | 2018-08-09 | 2020-02-13 | 太平洋未来科技（深圳）有限公司 | Light and shadow rendering method and device for virtual object in panoramic video, and electronic apparatus |
| CN111722177B (en) * | 2019-03-22 | 2023-06-16 | 成都信息工程大学 | Method for determining the orientation error of a radiation source |
Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1841123A (en) * | 2005-03-31 | 2006-10-04 | 周龙交 | Light source generation system and method thereof |
| DE102008022011A1 (en) * | 2008-05-02 | 2009-11-05 | Becker, Stefanie | Device for virtual representation of a light source and use of this |
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Patent Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1841123A (en) * | 2005-03-31 | 2006-10-04 | 周龙交 | Light source generation system and method thereof |
| DE102008022011A1 (en) * | 2008-05-02 | 2009-11-05 | Becker, Stefanie | Device for virtual representation of a light source and use of this |
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| CN102322839A (en) | 2012-01-18 |
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Inventor after: Li Xiangning Inventor after: Xue Dengpan Inventor after: Zhang Xiaohai Inventor after: Li Yuan Inventor before: Li Xiangning Inventor before: Xue Dengpan |
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Free format text: CORRECT: INVENTOR; FROM: LI XIANGNING XUE DENGPAN TO: LI XIANGNING XUE DENGPAN ZHANG XIAOHAI LI YUAN |
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