CN115640675B - Long-distance projection lamp range prediction method - Google Patents
Long-distance projection lamp range prediction method Download PDFInfo
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- CN115640675B CN115640675B CN202211206080.7A CN202211206080A CN115640675B CN 115640675 B CN115640675 B CN 115640675B CN 202211206080 A CN202211206080 A CN 202211206080A CN 115640675 B CN115640675 B CN 115640675B
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Abstract
The application discloses a method for predicting the range of a remote projection lamp, which comprises the following steps: measuring a light source luminous flux of a projector, the projector comprising a light source and a multi-stage collimating optical system positioned behind the light source; measuring the area of the light source; calculating the surface luminosity L; measuring characteristic area A of final stage collimation optical system ξ The method comprises the steps of carrying out a first treatment on the surface of the By the formulaAnd calculating the projection range of the projection lamp. According to the method, the range is predicted according to the formula, real measurement is not needed, so that the method is not easily affected by fields, weather, personnel and other aspects, is more convenient, saves manpower and material resources, and has high prediction accuracy. In addition, in the prediction process, the quantity to be measured can be measured in a simple mode, and the method is easy to realize.
Description
Technical Field
The application belongs to the technical field of remote illumination, and particularly relates to a range prediction method of a remote projection lamp.
Background
Surface light sources such as LEDs and halogen lamps have been increasingly used in the field of remote illumination, where there are two methods for predicting the range: 1. simulating the range of the lamp by computer software (TracePro, zemax \Lighttool and the like); 2. actual measurement: because the remote lamp is far away, the true measurement is often not practically measuredThe real range adopts an alternative method: according to the illuminance formulaThe illuminance is inversely proportional to the square of the distance, that is,the range (specified in ANSI as the range when the illuminance drops to 0.25lux (also denoted lx)) is calculated by measuring the illuminance at a relatively close distance. The prior method has the following defects: 1. CAD drawing is needed for computer simulation, and simplification is sometimes needed; a large number of photons are required to be added in the simulation process to simulate relatively real data; long time and high computer pressure. 2. The actual measurement is affected by fields, weather, personnel and the like, and the manpower and material resources are spent.
Disclosure of Invention
The application aims to solve the problems of the prior art and provide a remote projection lamp range prediction method.
The technical solution for realizing the purpose of the application is as follows: a method of remote projector range prediction, the method comprising the steps of:
step 1, measuring the light source luminous flux of a projection lamp, wherein the projection lamp comprises a light source and a multi-stage collimation optical system positioned behind the light source;
step 2, measuring the area of the light source;
step 3, calculating the surface luminosity L;
step 4, measuring the characteristic area A of the final stage collimation optical system ξ ；
And 5, calculating the projection lamp range based on the content.
Further, the luminous flux of the light source in the step 1 is measured by an integrating sphere.
Further, the collimating optical system in step 1 is a reflective cup, a lens or a TIR lens system.
Further, when the light source and each stage of collimating optical system are regarded as being independent of each other, the surface luminosity L in step 3 refers to the surface luminosity of the light source, and the calculation formula is as follows:
wherein F is the luminous flux of the light source, A source Is the light source area.
Further, if the projector includes n-stage collimating optical systems, and the light source and the first m-stage collimating optical system are regarded as a whole, the surface luminosity L in step 3 refers to the surface luminosity of the whole; wherein m is less than n or m is less than or equal to n-1.
Further, the collimation optical system characteristic area A in step 4 ξ The light-reflecting cup is the light-emitting opening area of the reflecting cup, the light-emitting opening area of the lens or the light-emitting opening area of the TIR lens.
Further, the formula for calculating the projection lamp range in step 5 is:
wherein r is the projection range of the projection lamp, gamma is a coefficient, and gamma is E (0, 1)]L and A ξ In mm or m.
Further, for the case where the light source and each stage of collimating optical system are regarded as being independent of each other, the coefficientsγ i The values of the coefficients corresponding to the ith level of collimation optical system are (0, 1)]。
Further, for the case where the light source is regarded as one body with the first m-stage collimating optical system, the coefficientγ i The values of the coefficients corresponding to the ith level of collimation optical system are (0, 1)]。
Compared with the prior art, the application has the remarkable advantages that:
1) According to the method, the range is predicted according to the formula, real measurement is not needed, so that the method is not easily affected by fields, weather, personnel and other aspects, is more convenient, saves manpower and material resources, and has high prediction accuracy.
2) In the prediction process, the quantity to be measured can be measured in a simple manner, and the method is easy to realize.
The application is described in further detail below with reference to the accompanying drawings.
Drawings
Fig. 1 is a flowchart of a method of remote projector range prediction.
FIG. 2 is a graph of illumination from a platform TracePro simulation, under one embodiment.
Detailed Description
The present application will be described in further detail with reference to the drawings and examples, in order to make the objects, technical solutions and advantages of the present application more apparent. It should be understood that the specific embodiments described herein are for purposes of illustration only and are not intended to limit the scope of the application.
It should be noted that, if there is a description of "first", "second", etc. in the embodiments of the present application, the description of "first", "second", etc. is only for descriptive purposes, and is not to be construed as indicating or implying relative importance or implicitly indicating the number of technical features indicated. Thus, a feature defining "a first" or "a second" may explicitly or implicitly include at least one such feature. In addition, the technical solutions of the embodiments may be combined with each other, but it is necessary to base that the technical solutions can be realized by those skilled in the art, and when the technical solutions are contradictory or cannot be realized, the combination of the technical solutions should be considered to be absent and not within the scope of protection claimed in the present application.
In one embodiment, in conjunction with fig. 1, there is provided a method of remote projector range prediction, the method comprising the steps of:
step 1, measuring the light source luminous flux of a projection lamp, wherein the projection lamp comprises a light source and a multi-stage collimation optical system positioned behind the light source;
step 2, measuring the area of the light source; here, the rectangular light emitting area can be measured for length and width calculation, and the circular light emitting area can be measured for diameter calculation;
step 3, calculating the surface luminosity L;
step 4, measuring the characteristic area A of the final stage collimation optical system ξ ；
And 5, calculating the projection lamp range based on the content.
Here, the order of step 1 and step 2 is adjustable.
Further, in one of the embodiments, the light source luminous flux is measured by an integrating sphere in lumens (lm).
Further, in one embodiment, the collimating optical system in step 1 is a reflective cup, lens, or total internal reflection (total internal reflection, TIR) lens system.
Further, in one embodiment, when the light source and each stage of collimating optical system are regarded as being independent from each other, the surface luminosity L in step 3 refers to the surface luminosity of the light source, and the calculation formula is as follows:
wherein F is the luminous flux of the light source, A source Is the light source area.
Further, in one embodiment, the projector includes n-level collimating optical systems, and the light source and the first m-level collimating optical system are regarded as a whole, and then the surface luminosity L in step 3 refers to the surface luminosity of the whole; wherein m is less than n or m is less than or equal to n-1.
Further, in one embodiment, the collimating optical system characteristic area A in step 4 ξ The light-reflecting cup is the light-emitting opening area of the reflecting cup, the light-emitting opening area of the lens or the light-emitting opening area of the TIR lens.
Further, in one embodiment, the formula for calculating the range of the projector in step 5 is:
wherein r is the projection range of the projection lamp, gamma is a coefficient, and gamma is E (0, 1)]L and A ξ In mm or m. Here, γ takes 1 as the maximum range theoretically attainable by the projector, but it is practically impossible to achieve, the actual value range is preferably 0.6-0.9, the general value is 0.7-0.8, the prediction is relatively close to the actual value, wherein uniform light emission can take 0.8, and Lambertian (LED) light emission can take 0.85.
Here further, for the case where the light source and each stage of collimating optical system are regarded as being independent of each other, the coefficientsγ i The values of the coefficients corresponding to the ith level of collimation optical system are (0, 1)]。
Still further, for the case where the light source is considered as a whole with the first m-stage collimating optical system, the coefficientγ i The values of the coefficients corresponding to the ith level of collimation optical system are (0, 1)]。
In one embodiment, a remote projector range prediction system is provided, the system comprising:
a first module for measuring a light source luminous flux of a projector, the projector comprising a light source and a multi-stage collimating optical system located behind the light source;
a second module for measuring the light source area;
a third module for calculating a face luminosity L;
a fourth module for measuring the characteristic area A of the final stage collimating optical system ξ ；
And a fifth module for calculating a projection lamp range based on the above.
For specific limitations on the remote projector range prediction system, reference may be made to the above limitations on the remote projector range prediction method, and no further description is given here. The various modules in the remote projector range prediction system described above may be implemented in whole or in part by software, hardware, and combinations thereof. The above modules may be embedded in hardware or may be independent of a processor in the computer device, or may be stored in software in a memory in the computer device, so that the processor may call and execute operations corresponding to the above modules.
In one embodiment, a computer device is provided comprising a memory, a processor, and a computer program stored on the memory and executable on the processor, the processor implementing the steps of when executing the computer program:
step 1, measuring the light source luminous flux of a projection lamp, wherein the projection lamp comprises a light source and a multi-stage collimation optical system positioned behind the light source;
step 2, measuring the area of the light source;
step 3, calculating the surface luminosity L;
step 4, measuring the characteristic area A of the final stage collimation optical system ξ ；
And 5, calculating the projection lamp range based on the content.
For specific limitations on each step, reference is made to the above limitation on the remote projector range prediction method, and no further description is given here.
In one embodiment, a computer readable storage medium is provided having a computer program stored thereon, which when executed by a processor, performs the steps of:
step 1, measuring the light source luminous flux of a projection lamp, wherein the projection lamp comprises a light source and a multi-stage collimation optical system positioned behind the light source;
step 2, measuring the area of the light source;
step 3, calculating the surface luminosity L;
step 4, measuring the characteristic area A of the final stage collimation optical system ξ ；
And 5, calculating the projection lamp range based on the content.
For specific limitations on each step, reference is made to the above limitation on the remote projector range prediction method, and no further description is given here.
As a specific example, in one embodiment, the present application is further illustrated.
1. Range simulation
The parameters are as follows:
1) Area of light source: 1.0X1.0;
2) Face luminosity: 750/ 2 The method comprises the steps of carrying out a first treatment on the surface of the Uniformly emitting light;
3) Collimation optical system: parabolic reflector cup, 120 high, 100 outlet diameter, 100% reflectivity of inner surface;
4) And (3) a platform: tracePro calculates 500000 rays, the illuminance map is shown in FIG. 2, 100 points are selected as the target surface, and as can be seen from FIG. 2, the maximum illuminance at 100 points is 153.46lux, the range is thenHere according to ANSI standard e=0.25 lux.
The range is calculated according to the formula provided by the application:
the range calculated by the formula of the application is calculated from the above to be 1.13% of the error of the simulated range.
2. Range experiment
The parameters are as follows:
1) LED light source: 1.0X1.0;
2) Face luminosity: 451.25/ 2 (the LED luminous flux is 451.25lm at 4A current measured by an integrating sphere); the lambertian body emits light;
3) Collimation optical system: parabolic reflecting cup with height of 120, outlet diameter of 100, inner surface vacuum aluminizing, reflectivity of 98%;
4) Actual measurement: the maximum illuminance value at 100m is 82.6lux, and the estimated range is:
the illuminance value is 85.75 under the same parameters as the actual measurement through the tracePro platform simulation calculation, and the calculated range is as follows:
the range calculated by the formula provided by the application is as follows:
the above results were compared: the error between the calculated range and the simulated range of the formula is 0.67%, and the error between the calculated range and the actual experimental measurement range of the formula is 1.21%.
From the above, the prediction accuracy of the remote projection lamp range prediction method provided by the application is relatively high.
The foregoing has outlined and described the basic principles, features, and advantages of the present application. It will be understood by those skilled in the art that the foregoing embodiments are not intended to limit the application, and the above embodiments and descriptions are meant to be illustrative only of the principles of the application, and that various modifications, equivalent substitutions, improvements, etc. may be made within the spirit and scope of the application without departing from the spirit and scope of the application.
Claims (7)
1. A method for predicting range of a remote projector, the method comprising the steps of:
step 1, measuring the light source luminous flux of a projection lamp, wherein the projection lamp comprises a light source and a multi-stage collimation optical system positioned behind the light source; the collimating optical system is a reflecting cup, a lens or a Total Internal Reflection (TIR) lens system;
step 2, measuring the area of the light source;
step 3, calculating the surface luminosity L; the face luminosity L refers to the face luminosity of the light source;
step 4, measuring the final level of quasi-Characteristic area A of straight optical system ξ The method comprises the steps of carrying out a first treatment on the surface of the Collimation optical system characteristic area A ξ The light outlet area of the reflecting cup, the light outlet area of the lens or the light outlet area of the TIR lens;
and 5, calculating the projection lamp range based on the content, wherein the formula is as follows:
wherein r is the projection range of the projection lamp, gamma is a coefficient, and gamma is (0, 1).
2. The method of claim 1, wherein the light source luminous flux in step 1 is measured by an integrating sphere.
3. The method according to claim 1, wherein when the light source and each stage of collimating optical system are regarded as independent of each other, the face luminosity L in step 3 is calculated by:
wherein F is the luminous flux of the light source, A source Is the light source area.
4. The method according to claim 1, wherein the projector comprises an n-stage collimating optical system, and the light source and the first m-stage collimating optical system are regarded as a whole, and the surface luminosity L in the step 3 is the surface luminosity of the whole; wherein m is less than n or m is less than or equal to n-1.
5. A method of predicting range of a remote projector according to claim 1 or 3, wherein the coefficients are set for the case where the light source and each stage of collimating optical system are regarded as independent of each otherγ i The values of the coefficients corresponding to the ith level of collimation optical system are (0, 1)]。
6. The method according to claim 1 or 4, wherein the coefficients are for a case where the light source is considered as one body with the first m-stage collimating optical systemγ i The values of the coefficients corresponding to the ith level of collimation optical system are (0, 1)]。
7. The method of claim 6, wherein the coefficient corresponding to each stage of collimating optics preferably has a value in the range of 0.6 to 0.9.
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| EP2728633A2 (en) * | 2012-11-05 | 2014-05-07 | LG Innotek Co., Ltd. | Light emitting device |
| CN203299456U (en) * | 2012-12-28 | 2013-11-20 | 上海天狼星电器有限公司 | Optical system capable of realizing remotely-projected quasi parallel narrow beams |
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