CN107907212B - Space spectrum radiation measuring method and space spectrum radiation measuring system - Google Patents
Space spectrum radiation measuring method and space spectrum radiation measuring system Download PDFInfo
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Abstract
The invention discloses a space spectrum radiation measuring method and a space spectrum radiation measuring system, belonging to the field of optical radiation measurement, wherein the method comprises a measured light source, a lighting face mask, a light guide collecting screen and a plane spectrum information measuring device, wherein: the measured light source is arranged in the lighting face mask, and a proper number of lighting points with definite space coordinate positions are arranged on the lighting face mask; a light guide input end is arranged on each light sampling point, and the light guide input end is opposite to a detected light source; the light guide output ends are arranged on the light guide collecting screen according to the determined arrangement sequence, and light rays emitted by a detected light source and diverging in all directions of a space are transmitted through the light guide and are output on the light guide collecting screen in a centralized manner; the planar spectral information measuring equipment is arranged on the front face of the light guide collecting screen and used for collecting spectral radiation information output by each light guide on the light guide collecting screen. The invention realizes the one-time rapid acquisition of the spatial spectrum information of the light source, and has high acquisition efficiency and good measurement stability.
Description
Technical Field
The present invention relates to the field of optical radiation measurement, and in particular, to a method and a system for measuring spatial spectrum radiation.
Background
As important parameters of a lamp or a light source, accurate measurement of optical characteristics such as light intensity distribution, chromaticity distribution, luminance distribution, total luminous flux, and the like in each spatial direction is particularly important. The distributed photometer is a special instrument for measuring the characteristics of an optical lamp, and the measuring principle of the distributed photometer is mainly an illumination distance inverse square law which requires that the distance between a measured object and an optical detector is long enough; in addition, in order to accurately measure parameters such as light intensity distribution in a lamp or a light source space, it is necessary to maintain a fixed burning point posture of an object to be measured, and thus, a stability requirement of a distribution photometer is extremely high. The traditional distribution photometers are various in types, and the distribution photometer with high measurement accuracy comprises a reflector type distribution photometer, a synchronous reflection distribution photometer, a rotary mirror type distribution photometer and the like.
The existing distributed photometer measuring method is that a light source is arranged at a fixed position in space, a light detector is arranged on a mechanical arm capable of rotating in space, interval type circular motion is carried out around the light source in the space keeping a certain distance with the light source, in the process of the interval type circular motion, interval type spectrum information sampling is carried out under the control of a mechanical device, the light detector pauses for a certain time at the determined angle position to measure spectrum information when the space rotates for a certain angle, and the like until the spectrum information measurement of different space position points in the whole space to-be-measured range is completed. The measuring method requires the optical detector device to be started and stopped for multiple times, the positions of the optical detector device during starting and stopping are difficult to be accurately positioned mechanically, therefore, the accuracy of the measuring angle is low, long-term repeatability is difficult to guarantee, the measuring method consumes a long time during the measuring process, particularly when the measuring angle interval is small, the measuring frequency is more, and the measuring time is longer. The measurement mode can not meet the requirement of rapid spectrum measurement of a large number of multi-frequency tests.
Disclosure of Invention
In order to solve the technical problems, the invention provides a space spectrum radiation measuring method and a space spectrum radiation measuring system, which realize one-time rapid acquisition of space spectrum information of a light source, and have high acquisition efficiency and good measurement stability.
The technical scheme provided by the invention is as follows:
a space spectrum radiation measuring method comprises a measured light source, a lighting mask, a light guide collecting screen and a plane spectrum information measuring device, wherein:
the measured light source is arranged in the lighting mask, the lighting masks with different sizes are arranged according to different measurement requirements of the measured light source, and a proper number of lighting points with definite space coordinate positions are arranged on the lighting masks;
a light guide input end is arranged on each light collecting point, the light guide input end faces a detected light source, and light rays emitted by the detected light source are collected;
the light guide output ends are arranged on the light guide collecting screen according to the determined arrangement sequence, and light rays emitted by a detected light source and diverging in all directions of a space are transmitted through the light guide and are output on the light guide collecting screen in a centralized manner;
the planar spectral information measuring equipment is arranged on the front face of the light guide collecting screen and used for collecting spectral radiation information output by each light guide on the light guide collecting screen, and the planar spectral information measuring equipment calculates and obtains radiation spectral data of each angle of a measured light source space according to spatial coordinate position information of each light guide input end, arrangement position information of the light guide output ends and spectral radiation information output by each light guide.
Furthermore, the measured light source is a point light source, the lighting mask is a spherical lighting mask, the point light source is arranged on a spherical center point of the spherical lighting mask, and according to different measurement requirements of the point light source, spherical lighting masks with different radiuses are arranged and lighting points with proper numbers and definite spherical coordinate positions are arranged on the spherical lighting mask.
Furthermore, each lighting point is arranged on the spherical lighting surface cover according to the arrangement mode of a series of circular rings, and the circular rings are perpendicular to the central axis of the point light source.
Further, the light guide output ends are arranged on the light guide collecting screen in concentric circles corresponding to the series of circular rings.
Furthermore, the measured light source is a linear light source, the lighting mask is a cylindrical lighting mask, the linear light source is installed on a central shaft of the cylindrical lighting mask, cylindrical lighting masks with different axial radiuses are arranged according to different measurement requirements of the linear light source, and a proper number of lighting points with definite cylindrical coordinate positions are arranged on the cylindrical lighting mask.
Furthermore, each lighting point is arranged on the cylindrical lighting face cover according to the arrangement mode of a series of circular rings, and the series of circular rings are perpendicular to the central axis of the lighting face cover.
Furthermore, the light guide output ends are distributed on the light guide collecting screen according to a rectangular surface corresponding to the unfolded surface of the cylindrical lighting mask.
The utility model provides a space spectral radiance measurement system, including the light source of being surveyed, the daylighting face guard, a plurality of light guides, the light guide gathers the screen, plane spectral information measuring equipment, the light source of being surveyed is installed inside the daylighting face guard, the light guide input end is installed on the daylighting face guard according to definite space coordinate position, the light guide input end is just to being surveyed the light source, gather the light that is sent by the light source, the light that is sent by the light source and diverges to the space all directions passes through the light guide conduction, the concentrated output on the light guide gathers the screen, plane spectral information measuring equipment sets up the front of light guide gathers the screen, gather the spectral radiance information of each light guide output on the light guide gathers the screen.
Furthermore, the detected light source is a point light source, and the lighting mask is a spherical lighting mask.
Furthermore, the measured light source is a linear light source, and the lighting mask is a cylindrical lighting mask.
The invention has the following beneficial effects:
the lighting mask with the determined spatial position is arranged according to different measurement requirements of the measured light source, the light guide input end is installed at the determined position on the lighting mask, the spectral information of the light source is collected, the spatial position of each lighting point on the lighting mask is determined relative to the spatial position of the measured light source, and the setting density of the lighting points on the lighting mask can be flexibly set according to the measurement requirements of the measured light source, so that the spatial position accuracy of the spatial spectrum collection of the measured light source is ensured.
The light spectrum of the measured light source at each spectrum collection point on the lighting surface cover enters the light guide through the light guide input end and then outputs the spectrum information through the light guide output end, and the spectrum information output by the light guide output end is collected by the plane spectrum information measuring equipment. The light guide output ends are installed on the light guide collecting screen according to the determined arrangement sequence, the plane spectrum collecting device can collect all spectrum information on the light guide collecting screen at one time, the plane position information of the light guide output ends and the space position information of the light guide input ends are accurately determined and are in one-to-one correspondence, the plane spectrum collecting device records the plane position information of the light guide output ends and the space position information of the light guide input ends while collecting the spectrum information of the light guide output ends, and the plane spectrum collecting device can accurately and quickly calculate the space spectrum distribution data of the detected light source according to the information.
Drawings
FIG. 1 is a schematic diagram of a method (system) for measuring spatial spectrum radiation in accordance with the present invention;
FIG. 2 is a top view of a spherical daylighting mask;
FIG. 3 is a schematic view of a light-guiding collecting screen corresponding to a spherical lighting mask;
FIG. 4 is a schematic illustration of a set of concentric circles on a light guide summary screen;
FIG. 5 is a schematic view of another set of concentric circles on a light guide summary screen;
FIG. 6 is a schematic view of a cylindrical daylighting mask;
fig. 7 is a schematic view of a light-guiding collecting screen corresponding to a cylindrical lighting mask.
Detailed Description
In order to make the technical problems, technical solutions and advantages of the present invention more apparent, the following detailed description is given with reference to the accompanying drawings and specific embodiments.
The invention provides a space spectrum radiation measuring method, as shown in fig. 1-2, comprising a measured light source 1, a lighting face mask 2, a light guide 3, a light guide collecting screen 4 and a plane spectrum information measuring device 5, wherein:
the light source 1 to be measured is installed in the lighting mask 2, and according to different measurement requirements of the light source 1 to be measured, lighting masks 2 with different sizes are arranged, and a proper number of lighting points 6 with definite coordinate positions are selected on the lighting mask 2.
A light guide input end 7 is arranged on each light collecting point 6, the light guide input end 7 is opposite to the light source 1 to be measured, and light rays emitted by the light source 1 to be measured are collected; light guide output ends 8 are arranged on the light guide collecting screen 4 according to a determined arrangement sequence, and light rays emitted by the light source 1 to be detected and diverged in all directions of space are transmitted through the light guide 3 and are output on the light guide collecting screen 4 in a centralized mode.
The planar spectral information measuring device 5 is arranged on the front face of the light guide collecting screen 4 and used for collecting spectral radiation information output by each light guide 3 on the light guide collecting screen 4, and the planar spectral information measuring device 5 calculates and obtains radiation spectral data of each angle in the space of the measured light source 1 according to the space coordinate position information of each light guide input end 7, the arrangement position information of the light guide output ends 8 and the spectral radiation information output by each light guide.
The lighting mask with the determined spatial position is arranged according to different measurement requirements of the measured light source, the light guide input end is installed at the determined position on the lighting mask, the spectral information of the light source is collected, the spatial position of each lighting point on the lighting mask is determined relative to the spatial position of the measured light source, and the setting density of the lighting points on the lighting mask can be flexibly set according to the measurement requirements of the measured light source, so that the spatial position accuracy of the spatial spectrum collection of the measured light source is ensured.
The light spectrum of the measured light source at each spectrum collection point on the lighting surface cover enters the light guide through the light guide input end and then outputs the spectrum information through the light guide output end, and the spectrum information output by the light guide output end is collected by the plane spectrum information measuring equipment. The light guide output ends are installed on the light guide collecting screen according to the determined arrangement sequence, the plane spectrum collecting device can collect all spectrum information on the light guide collecting screen at one time, the plane position information of the light guide output ends and the space position information of the light guide input ends are accurately determined and are in one-to-one correspondence, the plane spectrum collecting device records the plane position information of the light guide output ends and the space position information of the light guide input ends while collecting the spectrum information of the light guide output ends, and the plane spectrum collecting device can accurately and quickly calculate the space spectrum distribution data of the detected light source according to the information.
When the light source 1 to be measured is a point light source, the lighting mask 2 is preferably a spherical lighting mask, as shown in fig. 1-2, the point light source 1 is preferably installed on the spherical center point of the spherical lighting mask 2, and according to different measurement requirements of the point light source 1, the spherical lighting mask 2 with different radii and the spherical lighting mask are provided with a proper number of lighting points 6 with definite spherical coordinate positions.
The central axis 14 of the point light source is the central axis formed by the most concentrated direction of the light radiation of the point light source and is also the symmetrical distribution axis of the point light source, the intersection point of the central axis of the point light source and the spherical lighting mask is the lighting pole 9 of the spherical lighting mask, and the coordinate position of the lighting pole 9 of the spherical lighting mask corresponds to the coordinate central point 10 of the light guide collecting screen or the coordinate position of the starting point of the sequential arrangement mode.
In order to make the distribution of lighting points more uniform, according to the central point of lighting 9 of the spherical lighting mask, each lighting point 6 is arranged on the spherical lighting mask 2 according to the arrangement mode of a series of circular rings 11, each circular ring 11 comprises a plurality of lighting points 6, the lighting points 6 on the same circular ring 11 are evenly spaced, and the circular rings 11 are perpendicular to the central axis 14 of the point light source. The circular ring of the present invention is not a circular ring line actually existing, but a shape in which the respective lighting points are arranged, and the circular ring line in the drawings is a line for assisting understanding, and does not actually exist.
In order to conveniently position the series of circular rings 11, a zenith angle theta (12 in fig. 1 is the zenith angle theta) of a spherical coordinate is used for measuring the series of circular rings 11, and a lighting pole 9 of the spherical lighting mask is a zenith angle of 0 degree (the lighting pole is also regarded as a circular ring, and the radius of the circular ring is 0); other rings may be any zenith angle, and a specific example is given below: the zenith angle is 10-180 degrees, a ring is arranged every 10 degrees, and 180 degrees of the zenith angle is the lower extreme.
According to the actual measurement requirement of the measured light and the volume size of the lighting mask, different numbers of lighting points, such as 5, 50, 100 and the like, are arranged on the circular rings at different zenith angles. One specific example is given below:
the number of lighting points on the circular ring with the zenith angle of 0-180 degrees (at an interval of 10 degrees) is 1, 6, 12, 18, 23, 28, 31, 34, 35, 36, 35, 34, 31, 28, 23, 18, 12, 6 and 1 in sequence.
In order to achieve an intuitively uniform distribution of the light-guide outputs on the light-guide collecting screen, the light-guide outputs 8 are arranged on the light-guide collecting screen 4 in concentric circles 13 corresponding to the aforementioned series of circles 11, as shown in fig. 3-5. The concentric circles of the present invention do not actually exist, but are arranged in a shape, and the concentric circles in the drawings are lines for assisting understanding, and do not actually exist. As shown in fig. 4 and 5, the concentric circles of fig. 4 correspond to a circle having a zenith angle of 0 ° to a zenith angle of 90 ° from inside to outside, and the concentric circles of fig. 5 correspond to a circle having a zenith angle of 100 ° to a zenith angle of 170 ° from outside to inside.
When the light source 1 to be measured is a linear light source, the lighting mask 2 is preferably a cylindrical lighting mask, as shown in fig. 6, the linear light source is preferably installed on the central axis of the cylindrical lighting mask, cylindrical lighting masks with different axial radii and lengths are arranged according to different measurement requirements of the linear light source, and a proper number of lighting points 6 with definite cylindrical coordinate positions are arranged on the cylindrical lighting mask.
For example, the lighting points are arranged on the cylindrical lighting cover according to the arrangement of a series of rings 11, the distances between the rings 11 are equal or different, preferably, the number of the lighting points 6 on each ring 11 is the same, the lighting points 6 on the same ring 11 are evenly spaced, and the series of rings 11 are perpendicular to the central axis of the lighting cover 2. The space position of each light collecting point is determined relative to the position of the linear light source, and the coordinates are clear.
In order to achieve an intuitively uniform distribution of the light guide outputs over the light guide collecting screen, the light guide outputs are distributed over the light guide collecting screen 4 according to a rectangular plane corresponding to the extended surface of the cylindrical lighting mask, as shown in fig. 7.
On the other hand, the invention provides a spatial spectral radiance measuring system, as shown in fig. 1, including a measured light source 1, a lighting mask 2, a plurality of light guides 3, a light guide collecting screen 4, and a planar spectral radiance measuring device 5, where the measured light source 1 is installed inside the lighting mask 2, a light guide input end 7 is installed on the lighting mask 2 according to a determined spatial coordinate position, the light guide input end 7 faces the measured light source 1, collects light emitted by the measured light source 1, a light guide output end 8 is installed on the light guide collecting screen 4 according to a determined arrangement order, light emitted by the measured light source 1 and diverging in all directions of the space is transmitted through the light guides 3 and is centrally output on the light guide collecting screen 4, the planar spectral radiance measuring device 5 is installed on the front of the light guide collecting screen 4, and collects spectral radiance information output by each light guide 3 on the light guide.
The space spectrum radiation measuring system of the invention measures the space spectrum distribution data of the light source according to the space spectrum radiation measuring method. The method and the device realize one-time rapid acquisition of the spatial spectrum information of the light source, and have high acquisition efficiency and good measurement stability.
When the measured light source is a point light source, the lighting mask is a spherical lighting mask, and when the measured light source is a linear light source, the lighting mask is a cylindrical lighting mask. In the present invention, the spherical mask is not a full sphere, but may be a part of a sphere, such as a hemisphere.
While the foregoing is directed to the preferred embodiment of the present invention, it will be understood by those skilled in the art that various changes and modifications may be made without departing from the spirit and scope of the invention as defined in the appended claims.
Claims (4)
1. A space spectrum radiation measuring method comprises a measured light source, a lighting mask, a light guide collecting screen and a plane spectrum information measuring device, and is characterized in that:
the measured light source is arranged in the lighting mask, the lighting masks with different sizes are arranged according to different measurement requirements of the measured light source, and a proper number of lighting points with definite space coordinate positions are arranged on the lighting masks;
a light guide input end is arranged on each light collecting point, the light guide input end faces a detected light source, and light rays emitted by the detected light source are collected;
the light guide output ends are arranged on the light guide collecting screen according to the determined arrangement sequence, and light rays emitted by a detected light source and diverging in all directions of a space are transmitted through the light guide and are output on the light guide collecting screen in a centralized manner;
the planar spectral information measuring equipment is arranged on the front face of the light guide collecting screen and used for collecting spectral radiation information output by each light guide on the light guide collecting screen, and the planar spectral information measuring equipment calculates and obtains radiation spectral data of each angle of a measured light source space according to the spatial coordinate position information of each light guide input end, the arrangement position information of the light guide output ends and the spectral radiation information output by each light guide;
wherein: the detected light source is a point light source, and the lighting mask is a spherical lighting mask; each lighting spot is arranged on the spherical lighting surface cover according to the arrangement mode of a series of circular rings, and the series of circular rings are vertical to the central axis of the point light source; the light guide output ends are arranged on the light guide collecting screen according to concentric circles corresponding to the series of circular rings;
or, the measured light source is a linear light source, and the lighting mask is a cylindrical lighting mask; each lighting spot is arranged on the cylindrical lighting surface cover according to the arrangement mode of a series of circular rings, and the series of circular rings are perpendicular to the central axis of the lighting surface cover; the light guide output ends are distributed on the light guide collecting screen according to a rectangular surface corresponding to the unfolded surface of the cylindrical lighting mask.
2. The method for measuring spatial spectrum radiation according to claim 1, wherein the point light source is installed on a spherical center point of a spherical lighting mask, and spherical lighting masks with different radii and a proper number of lighting points with definite spherical coordinates are installed on the spherical lighting mask according to different measurement requirements of the point light source.
3. The method for measuring spatial spectrum radiation according to claim 1, wherein the linear light source is installed on the central axis of the cylindrical lighting mask, and cylindrical lighting masks with different axial radii are provided and a suitable number of lighting points with definite cylindrical coordinate positions are provided on the cylindrical lighting mask according to different measurement requirements of the linear light source.
4. A space spectrum radiation measuring system is characterized by comprising a measured light source, a lighting face mask, a plurality of light guides, a light guide collecting screen and a plane spectrum information measuring device, wherein the measured light source is arranged in the lighting face mask, a light guide input end is arranged on the lighting face mask according to a determined space coordinate position, a light guide input end faces the measured light source and collects light rays emitted by the measured light source, a light guide output end is arranged on the light guide collecting screen according to a determined arrangement sequence, light rays emitted by the measured light source and emitted towards all directions of a space are transmitted through the light guides and are output on the light guide collecting screen in a centralized manner, the plane spectrum information measuring device is arranged on the front face of the light guide collecting screen and collects spectrum radiation information output by each light guide on the light guide collecting screen;
the detected light source is a point light source, and the lighting mask is a spherical lighting mask; each lighting spot is arranged on the spherical lighting surface cover according to the arrangement mode of a series of circular rings, and the series of circular rings are vertical to the central axis of the point light source; the light guide output ends are arranged on the light guide collecting screen according to concentric circles corresponding to the series of circular rings;
or, the measured light source is a linear light source, and the lighting mask is a cylindrical lighting mask; each lighting spot is arranged on the cylindrical lighting surface cover according to the arrangement mode of a series of circular rings, and the series of circular rings are perpendicular to the central axis of the lighting surface cover; the light guide output ends are distributed on the light guide collecting screen according to a rectangular surface corresponding to the unfolded surface of the cylindrical lighting mask.
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| CN109632098B (en) * | 2019-01-18 | 2021-06-11 | 陈岱晴 | Method and system for measuring space optical radiation of small-sized luminous body and optical fiber image transmission bundle |
| CN109612583A (en) * | 2019-01-18 | 2019-04-12 | 陈岱晴 | A kind of point light source method for measuring space spectral radiance and measuring system |
| CN109612584A (en) * | 2019-01-18 | 2019-04-12 | 陈岱晴 | A kind of linear light source method for measuring space spectral radiance and measuring system |
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| JP6101176B2 (en) * | 2013-08-30 | 2017-03-22 | 富士フイルム株式会社 | Optical characteristic measuring apparatus and optical characteristic measuring method |
| CN105954209A (en) * | 2016-04-21 | 2016-09-21 | 厦门大学 | Multichannel testing system for near-field spatial distribution of light source |
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