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CN-116107084-B - Lens surface parameter acquisition method and device and blackboard lamp lens

CN116107084BCN 116107084 BCN116107084 BCN 116107084BCN-116107084-B

Abstract

The application relates to the field of optics, and discloses a lens surface parameter acquisition method and device and a blackboard lamp lens. The method for acquiring the lens surface parameters comprises the step of acquiring target parameters in lens application. And reversely fitting according to the target parameters to obtain a target light distribution curve. And establishing a corresponding relation between the light source beam angle and the target light distribution curve according to a preset algorithm and the target light distribution curve. And calculating according to the corresponding relation between the target light distribution curve, the light source beam angle and the target light distribution curve to obtain the surface parameters of the lens. The obtained lens can realize target parameters in application scenes, effectively reduce design period, improve design precision, reduce cost and reduce requirements on designers.

Inventors

  • FANG XIANG

Assignees

  • 厦门立达信照明有限公司

Dates

Publication Date
20260508
Application Date
20220125

Claims (9)

  1. 1. A method for obtaining parameters of a lens surface, comprising: acquiring target parameters in the application of the lens; reversely fitting according to the target parameters to obtain a target light distribution curve; establishing a corresponding relation between a light source beam angle and the target light distribution curve according to a preset algorithm and the target light distribution curve; calculating to obtain the surface parameters of the lens according to the corresponding relation between the target light distribution curve, the light source beam angle and the target light distribution curve; The target parameters comprise illumination intensity of a light source, distance and height between a lens and an irradiated target and an included angle between at least one measuring point on the irradiated target and the light source, wherein the target parameters also comprise blackboard illumination and uniformity; The step of reversely fitting according to the target parameters to obtain a target light distribution curve comprises the following steps: And reversely fitting to obtain a function of the target luminous intensity of each measuring point according to the distance and the height between the lens and the irradiated target and the included angle between at least one measuring point on the irradiated target and the light source, wherein the curve of the function of the target luminous intensity of the measuring point in a coordinate system is the target light distribution curve.
  2. 2. The method according to claim 1, wherein the establishing a correspondence between the light source beam angle and the target light distribution curve according to a preset algorithm and the target light distribution curve includes: Obtaining a plurality of groups of luminous intensity values according to a function of the target luminous intensity of the measuring point through a preset interpolation algorithm; Fitting to obtain a function of the light source beam angle according to the multiple groups of luminous intensity values; and calculating and acquiring the corresponding relation between the light source beam angle and the target light distribution curve according to the function of the light source beam angle and the function of the target luminous intensity of the measuring point.
  3. 3. The method of claim 2, wherein calculating the surface parameters of the lens from the correspondence between the target light distribution curve, the light source beam angle, and the target light distribution curve comprises: and according to the Snell's law, calculating and acquiring coordinates of each point on the lens surface according to the corresponding relation between the target light distribution curve, the light source beam angle and the target light distribution curve.
  4. 4. A method according to any one of claims 1-3, further comprising, after obtaining the surface parameters of the lens: And establishing a model of the lens according to the surface parameters of the lens.
  5. 5. A lens surface parameter acquisition apparatus, comprising: the acquisition module is used for acquiring target parameters in the application of the lens; The fitting module is used for reversely fitting according to the target parameters to obtain a target light distribution curve; the fitting module is further used for establishing a corresponding relation between a light source beam angle and the target light distribution curve according to a preset algorithm and the target light distribution curve; The calculation module is used for calculating the surface parameters of the lens according to the corresponding relation between the target light distribution curve, the light source beam angle and the target light distribution curve; The target parameters comprise illumination intensity of a light source, distance and height between a lens and an irradiated target and an included angle between at least one measuring point on the irradiated target and the light source, wherein the target parameters also comprise blackboard illumination and uniformity; the fitting module is specifically configured to reversely fit to obtain a function of a target luminous intensity of each measurement point according to a distance and a height between the lens and the irradiated target and an included angle between at least one measurement point on the irradiated target and the light source, where a curve of the function of the target luminous intensity of the measurement point in a coordinate system is the target light distribution curve.
  6. 6. The device according to claim 5, wherein the fitting module is specifically configured to obtain a plurality of sets of luminous intensity values according to a function of the target luminous intensity of the measurement point through a preset interpolation algorithm; Fitting to obtain a function of the light source beam angle according to the multiple groups of luminous intensity values; and calculating and acquiring the corresponding relation between the light source beam angle and the target light distribution curve according to the function of the light source beam angle and the function of the target luminous intensity of the measuring point.
  7. 7. The device according to claim 6, wherein the calculating module is configured to calculate and obtain coordinates of each point on the lens surface according to the corresponding relationship between the target light distribution curve, the light source beam angle and the target light distribution curve according to snell's law.
  8. 8. The apparatus of any of claims 5-7, further comprising a modeling module for modeling the lens based on surface parameters of the lens.
  9. 9. A blackboard lamp lens, characterized in that the surface parameters of the blackboard lamp lens are obtained according to the lens surface parameter acquisition method provided in any one of claims 1 to 4.

Description

Lens surface parameter acquisition method and device and blackboard lamp lens Technical Field The present application relates to the field of optics, and in particular, to a method and an apparatus for obtaining a lens surface parameter, and a blackboard lamp lens. Background The blackboard is a common device used in teaching or meeting, and the blackboard arranged indoors is often required to be illuminated due to insufficient indoor light, so that a better effect can be provided. At present, when designing lenses required by blackboard lamps, design requirements can be met through repeated debugging of a large number of repeated optical simulations according to previous experience. The method has the advantages of high requirements on designers, long design period, poor precision and high cost. Disclosure of Invention The application mainly aims to provide a lens surface parameter acquisition method and device and a blackboard lamp lens, and aims to solve the problems of high requirements on designers, long design period, poor precision and high cost when designing the lens. In a first aspect, the application provides a method for acquiring lens surface parameters, comprising the step of acquiring target parameters in lens application. And reversely fitting according to the target parameters to obtain a target light distribution curve. And establishing a corresponding relation between the light source beam angle and the target light distribution curve according to a preset algorithm and the target light distribution curve. And calculating according to the corresponding relation between the target light distribution curve, the light source beam angle and the target light distribution curve to obtain the surface parameters of the lens. In some embodiments, the target parameters include the illumination intensity of the light source, the distance and height between the lens and the illuminated target, and the angle between at least one measurement point on the illuminated target and the light source. And reversely fitting according to the target parameters to obtain a target light distribution curve, wherein the curve of the function of the target luminous intensity of each measuring point in a coordinate system is the target light distribution curve according to the distance and the height between the lens and the irradiated target and the included angle between at least one measuring point on the irradiated target and the light source. In some embodiments, the corresponding relation between the light source beam angle and the target light distribution curve is established according to a preset algorithm and the target light distribution curve, and the method comprises the steps of obtaining a plurality of groups of luminous intensity values according to a function of the target luminous intensity of the measuring point through a preset interpolation algorithm. And fitting to obtain a function of the light source beam angle according to the multiple groups of luminous intensity values. And calculating and acquiring the corresponding relation between the light source beam angle and the target light distribution curve according to the function of the light source beam angle and the function of the target luminous intensity of the measuring point. In some embodiments, the surface parameters of the lens are calculated according to the corresponding relation between the target light distribution curve and the light source beam angle, and the surface parameters of the lens are calculated and obtained according to the Snell's law and the corresponding relation between the target light distribution curve and the light source beam angle, and the target light distribution curve. In some embodiments, after obtaining the surface parameters of the lens, the method further comprises modeling the lens based on the surface parameters of the lens. In a second aspect, the application also provides a lens surface parameter acquisition device, which comprises an acquisition module for acquiring target parameters in lens application. And the fitting module is used for reversely fitting according to the target parameters to obtain a target light distribution curve. And the fitting module is also used for establishing the corresponding relation between the light source beam angle and the target light distribution curve according to a preset algorithm and the target light distribution curve. And the calculation module is used for calculating the surface parameters of the lens according to the corresponding relation between the target light distribution curve, the light source beam angle and the target light distribution curve. In some embodiments, the target parameters include the illumination intensity of the light source, the distance and height between the lens and the illuminated target, and the angle between at least one measurement point on the illuminated target and the light source. The fitting module is specifically confi