TWI587163B - System and method of lens design - Google Patents

Description

Lens design system and method thereof

The present invention relates to a lens design system and method thereof, and more particularly to a collimating lens that designs a free-form surface and adjusts the ratio of parameters associated with the quasi-value lens to design a lens that meets different lighting requirements.

At present, the general method of manufacturing collimating lenses is mostly for the manufacture and design of a single lens and a light-emitting diode. However, although a single collimating lens can be manufactured, it is difficult to change the illumination type or Appropriate changes are made in the illumination range, and therefore, various needs may not be met, making the use of the lens excessively singular.

On the other hand, the manufacture of lenses often requires experience, so if the lens is not used, an unnecessary cost increase will occur, so establishing a systematic design method is very important for lens manufacturing.

In view of the above-mentioned problems, the object of the present invention is to provide a lens design system and a method thereof for solving the shortcomings of the prior art lens design method.

Based on the above objects, the present invention provides a lens design system including an input module and a processing module. The input module can input a plurality of condition parameters, and the plurality of condition parameters include a refractive index of the lens, a light source coordinate point of the light emitting diode, a starting distance of the free curved surface and the light emitting diode, an incident angle, a light type, or a combination thereof. The processing module can calculate a plurality of slopes and complex numbers according to a plurality of condition parameters a coordinate, and the processing module calculates a plurality of reflection surface slopes and a plurality of refractive surface slopes according to the critical angle, and calculates a plurality of three-dimensional coordinate points according to the slopes of the plurality of reflection surfaces and the slopes of the plurality of refractive surfaces, according to the preset trajectory and the light pattern Extend and adjust a plurality of three-dimensional coordinate points. The plurality of three-dimensional coordinate points may be configured to include at least one light-emitting surface and a cross-section. When the light-emitting surface is non-horizontally disposed by the processing module, the illumination range is enlarged or reduced relative to the horizontal setting.

Preferably, the cross section may extend according to a preset trajectory.

Preferably, the plurality of extended three-dimensional coordinate points are applicable to at least one light source.

Based on the above object, the present invention further provides a lens design method, which is applicable to a lens design system, and includes the following steps: providing an input module to input a plurality of condition parameters, and the plurality of condition parameters further include a lens refractive index and a light emission The source point of the polar body, the starting distance of the free-form surface and the light-emitting diode, the incident angle, the light type, or a combination thereof.

The processing module calculates a plurality of slopes and a plurality of coordinates according to the plurality of condition parameters.

The processing module calculates a slope of the plurality of reflecting surfaces and a slope of the plurality of refractive surfaces according to the critical angle.

The processing module calculates a plurality of three-dimensional coordinate points according to the slope of the plurality of reflecting surfaces and the slope of the plurality of refractive surfaces.

The processing module extends a plurality of three-dimensional coordinate points according to the preset trajectory and the light pattern.

The plurality of three-dimensional coordinate points may be configured to include at least one light-emitting surface and a cross-section. When the light-emitting surface is non-horizontally disposed by the processing module, the illumination range may be enlarged or reduced relative to the horizontal setting.

Preferably, the cross section may extend according to a preset trajectory.

Preferably, the plurality of extended three-dimensional coordinate points are applicable to at least one light source.

As described above, the lens system and method of designing the same according to the present invention may have one or more of the following advantages:

(1) The lens system of the present invention and its design method can be designed to meet lenses of different illumination requirements by adjusting the ratio of lens related parameters.

(2) The lens system of the present invention and the design method thereof can be made into a lens having a wide range of illumination effects, and the light pattern can be adjusted as needed.

1‧‧‧Lens Design System

11‧‧‧Input module

12‧‧‧Processing module

13‧‧‧Display module

14‧‧‧ verification module

I‧‧‧incidence angle

Ic‧‧‧critical angle

The normal of N‧‧‧ free-form lens

Tp‧‧‧ tangent to freeform lens

S11~S16, S201~S209, S301~S310‧‧‧ steps

1 is a block diagram of a first embodiment of a lens design system in accordance with an embodiment of the present invention.

2 is a flow chart of a first embodiment of a lens design method according to an embodiment of the present invention.

Figure 3 is a flow chart of a second embodiment of a lens design method in accordance with an embodiment of the present invention.

Figure 4 is a schematic illustration of a second embodiment of a freeform lens in accordance with an embodiment of the present invention.

Figure 5 is a two-dimensional cross-sectional view showing a second embodiment of a free-form lens according to an embodiment of the present invention.

Figure 6 is a schematic illustration of the parallel illumination of light reflected by a freeform lens in accordance with an embodiment of the present invention.

Figure 7 is a schematic illustration of the parallel illumination of light rays refracted by a freeform lens according to an embodiment of the present invention.

8 is a flow chart of a third embodiment of a lens design method according to an embodiment of the present invention.

Figure 9 is a two-dimensional cross-sectional view showing a third embodiment of an embodiment of the present invention.

Figure 10 is a schematic view of a third embodiment of an embodiment of the present invention.

The technical features, contents, and advantages of the present invention, as well as the advantages thereof, can be understood by the present inventors, and the present invention will be described in detail with reference to the accompanying drawings. The subject matter is only for the purpose of illustration and description, and is not necessarily the true proportion and precise configuration after the implementation of the present invention. Therefore, the scope and configuration relationship of the attached drawings should not be interpreted or limited. First described.

Embodiments of the lens design system and method thereof according to the present invention will be described below with reference to the accompanying drawings. For the sake of understanding, the same elements in the following embodiments are denoted by the same reference numerals.

Please refer to FIG. 1, which is a block diagram of a first embodiment of a high lens design system in accordance with an embodiment of the present invention. As shown in the figure, the lens design system 1 of the present invention comprises an input module 11, a processing module 12, a display module 13, and a verification module 14.

In practice, the main systems and methods of the present invention mostly follow the methods and systems of the previous case. First, a plurality of condition parameters are first input to the input module 11 according to the required condition, wherein the plurality of condition parameters may include a refractive index of the lens, a light source coordinate point of the light emitting diode, a starting distance of the free curved surface and the light emitting diode, and incidence. Angle, light type, etc.

Thereafter, the plurality of condition parameters input through the input module 11 are processed by the processing module 12 according to the plurality of condition parameters to calculate a plurality of slopes and a plurality of coordinates, and the processing module 12 calculates the slopes of the plurality of reflection surfaces according to the critical angle. And a plurality of refractive surface slopes, and calculating a plurality of three-dimensional coordinate points according to the slopes of the plurality of reflecting surfaces and the slopes of the plurality of refractive surfaces.

After the above data is calculated by the processing module 12, a plurality of three-dimensional coordinate points are displayed via the display module 13, and finally, the verification module 14 is used to verify a plurality of three-dimensional coordinate points according to a plurality of conditions and a plurality of three-dimensional coordinate points. Whether the light type and illumination of the lens meet the requirements.

Referring now to Figure 2, there is shown a flow chart of a first embodiment of a lens designing method in accordance with an embodiment of the present invention.

First, as shown in step S11 and step S12, step S11 inputs a plurality of condition parameters for providing the input module, and then step S12 is to calculate a plurality of slopes and a plurality of coordinates according to the plurality of condition parameters by the processing module. Wherein, in step S11, the plurality of condition parameters may be parameters such as a refractive index of the lens, a coordinate point of the light-emitting diode source, a starting distance of the free-form surface and the light-emitting diode, and an incident angle. Then, in step S12, the processing module calculates a plurality of slopes, a plurality of coordinates, a critical angle, a plurality of reflection surface slopes, a plurality of refractive surface slopes, and a plurality of three-dimensional coordinate points according to the plurality of condition parameters input by the input module. content.

After the information is calculated in step S12, the processing module performs a plurality of reflection surface slopes according to the incident angle through the processing module, and finally calculates the complex number according to the incident angle and the slopes of the plurality of reflection surfaces by the processing module via step S122. Reflection point coordinates.

Wherein, in step S121 and step S122, when the incident angle of the light source is larger and larger, the vertical position of the coordinate of the reflection point will increase rapidly, that is, the thickness of the free surface may be increased. Therefore, it is impossible to make a thin lens. Therefore, further, the processing module 12 can calculate a critical angle according to a plurality of condition parameters, which is a boundary angle between light reflection and light refraction.

Therefore, as shown in step S13, S13 is to use a processing module to calculate a plurality of reflection surface slopes of the reflection surface and a plurality of refraction surface slopes of the refraction surface according to the critical angle.

Therefore, the step S13 includes the following steps S131 and S132, wherein the step S131 is to calculate a plurality of refractive surface slopes according to the critical angle and the incident angle by the processing module, and then the step S132 is performed by the processing module according to the critical angle, the incident angle, and A plurality of refractive index coordinates are calculated for a plurality of refractive surface slopes.

After obtaining the above-mentioned refraction point and the coordinates and the slope of the reflection point, the processing module calculates a plurality of three-dimensional coordinate points according to the slope of the plurality of reflection surfaces and the slopes of the plurality of refraction surfaces, and extends according to the desired light pattern. A plurality of three-dimensional coordinate points.

In order to enable the information to be imaged for observation, as shown in step S15, a plurality of three-dimensional coordinate points are displayed through the display module.

In order to know whether the designed free-form lens is sufficient for the lighting requirements of the design, the method for verifying the plurality of three-dimensional coordinate points according to the plurality of conditions and the plurality of three-dimensional coordinate points is verified by the verification module via step S16. Light type and illumination

If the obtained result is not as expected, the steps S14 to S16 may be repeated to perform the adjustment, and the implementation of the above steps may be achieved by the computer with the corresponding simulation software.

According to the first embodiment, the present invention further provides a second embodiment for further exemplification.

Please refer to FIG. 3, which is a flow chart of a second embodiment of the lens design method of the present invention. Please refer to the block diagram of the lens design system of FIG. 1 first, as shown in step S201, step S201 is to provide the coordinate point of the input module input light-emitting diode light source as the origin (0, 0), free-form surface and The distance of the light-emitting diode is 10 mm, the light source of the light-emitting diode is 1 mm ² and the incident angle is 0° to a critical angle.

Then, as shown in step S202 and step S204, step S202 is to calculate a plurality of reflection surface slopes according to the incident angle from 0° to the critical angle, and then pass through the processing module according to the incident angle of 0° to step S203. The critical angle and the plurality of reflection surface slopes calculate a plurality of reflection point coordinates, and the critical angle is 42.0390625° calculated by the processing module in step S204.

Then, through step S205, the processing module calculates a plurality of refractive surface slopes according to a critical angle of 42.0390625° and an incident angle of a critical angle to 90°; and step S26, by processing the module according to a critical angle of 42.0390625°, incident The angle is a critical angle to 90° and a plurality of refractive surface slopes are used to calculate a plurality of refractive point coordinates.

After a plurality of refraction point coordinates are obtained, a plurality of three-dimensional coordinate points are calculated by the processing module according to the slope of the plurality of reflection surfaces and the slopes of the plurality of refraction surfaces by the processing module.

So far, a plurality of three-dimensional coordinate points can be displayed through the display module in step S208.

Please refer to FIG. 4 together, which is a schematic diagram of a second embodiment of the free-form lens of the present invention. As shown in the figure, the lens design system of the present invention obtains a plurality of three-dimensional coordinate points by using steps S201 to S207, and displays a three-dimensional perspective view of the free-form surface lens by using the display module 13 to display a plurality of three-dimensional coordinate points in step S208. Moreover, the light-emitting diode light source passes through the free-form lens, and the light is collimated and collimated, that is, the free-form lens is a collimating lens, and finally the light pattern and the illuminance of the lens are completed through step S209. verification.

Please refer to FIG. 5, which is a two-dimensional cross-sectional view showing a second embodiment of the free-form lens of the present invention. In Fig. 5, the free-form lens is represented by a two-dimensional sectional view, and a light-emitting diode wafer 51 can be disposed at the center of the bottom of the lens as a light source. The solid line is the incident light and the light is refracted and then collimated The light emitted, the dotted line is the incident light and the light reflected by the parallel light. Among them, ic is the critical angle, and its critical angle is the boundary angle between light reflection and light refraction.

Figure 6 is a schematic diagram of the parallel light emitted by the light reflected through the freeform lens. Wherein, the coordinate point of the light-emitting diode light source is set as the origin (0, 0), i is the incident angle, the broken line N is the normal of the free-form lens, and the broken line Tp is the tangent of the free-form lens, and the solid line is light. Into the ray, the dotted line is the reflection line of the light, and the thick solid line is the free-form lens of the light reflecting portion.

Please refer to Fig. 7, which is a schematic diagram of the parallel light emitted by the light after being refracted by the free-form lens. Wherein, the coordinate point of the light-emitting diode light source is set as the origin (0, 0), i is the incident angle, the broken line N is the normal of the free-form lens, and the broken line Tp is the tangent of the free-form lens, and the solid line is light. The incident ray, the dotted line is the refracting line of the light, and the thick solid line is the free-form lens of the light reflecting portion.

However, the present invention is not limited thereto, and the system and method of the present invention can not only produce the free-form lens as shown in FIG. 5, but also change the inclination angle of the surfaces 501, 502 of the free-form lens in FIG. The light path of the edge light is changed so that it is not collimated, so the light type can be changed, and if the original illumination range is insufficient, the size range of the lens can be changed.

Referring to FIG. 8, steps S301 to S307 are the same as the second embodiment. The difference is that if the free-form lens does not meet the actual requirements, the free-form lens needs to be adjusted through step S308. Therefore, if a lens for illumination of a wide range and uniformity is required, for example, a uniform and illuminating illumination is required for a distance of 8 meters from a free-form surface lens and a plane of 8 meters in length and width. The plurality of three-dimensional point coordinates are finally displayed and verified through steps S308 and S309.

Please refer to FIG. 8 and FIG. 9 respectively, which are respectively a flow chart according to a third embodiment of the present invention and a two-dimensional cross-sectional view of the third embodiment, as shown in the figure, from steps 301 to 307. The second embodiment is the same, except that the surface 601 of the free-form lens can be adjusted in step 308, The tilt angle of 602, and from the basic optical refraction principle, the light will be refracted to the outside, so the tilt angle of the surface 601, 602 of the adjusted free-form lens is as shown in Fig. 9, not the freedom in Fig. 5. The surfaces 501, 502 of the curved lens are horizontal, thereby expanding the range of illumination.

Referring now to FIG. 10, FIG. 10 is a schematic view of a third embodiment of an embodiment of the present invention. In addition to changing the illumination type of the cross section of the lens, the cross section may be extended as shown. , into a wider lens, we will be able to extend it according to the actual needs as shown in Figure 10, into a circular free-form lens 70, and finally, the free-form lens 70 in the third embodiment in Figure 10 can be The verification module 14 verifies that 60 LEDs of 1 watt are disposed under the free-form lens 70, and a uniform and illuminating sufficient for the free-form lens 70 to be 8 meters away and 8 meters long and wide can be performed. illumination.

Therefore, the free-form surface lens of the present invention can change the range of illumination and the light type in addition to the collimated illumination characteristics of the prior case, and becomes a more versatile and multifunctional free-form surface lens.

The above is intended to be illustrative only and not limiting. Any equivalent modifications or alterations to the spirit and scope of the invention are intended to be included in the scope of the appended claims.

S11~S16‧‧‧Steps

Claims (6)

A lens design system comprising: an input module for inputting a plurality of condition parameters, wherein the plurality of condition parameters include a refractive index of a lens, a light source coordinate point of a light emitting diode, a free curved surface and the light emitting diode a starting distance of the body, an incident angle, a light type or a combination thereof; and a processing module, calculating a plurality of slopes and a plurality of coordinates according to the plurality of condition parameters, and the processing module calculates the complex number according to a critical angle a slope of the reflection surface and a slope of the plurality of refraction surfaces, and calculating a plurality of three-dimensional coordinate points according to the slope of the plurality of reflection surfaces and the slope of the plurality of refraction surfaces, and extending and adjusting the plurality of three-dimensional coordinates according to a predetermined trajectory and the optical pattern The plurality of three-dimensional coordinate points are configured to include at least one light-emitting surface and a cross-section. When the light-emitting surface is non-horizontally disposed by the processing module, the illumination range is enlarged or reduced relative to the horizontal setting. The lens design system of claim 1, wherein the cross section extends according to the predetermined trajectory. The lens design system of claim 1, wherein the plurality of three-dimensional coordinate points extending are applicable to at least one light source. A lens design method, suitable for a lens design system, comprising the steps of: providing an input module to input a plurality of condition parameters, wherein the plurality of condition parameters further comprise a lens refractive index, a light source coordinate point of a light emitting diode, a starting distance of a free curved surface from the light emitting diode, an incident angle, a light type, or a combination thereof; Calculating a plurality of slopes and a plurality of coordinates according to the plurality of condition parameters by using a processing module; using the processing module to calculate a plurality of reflection surface slopes and a plurality of refractive surface slopes according to a critical angle; The group calculates a plurality of three-dimensional coordinate points according to the slopes of the plurality of reflection surfaces and the slopes of the plurality of refractive surfaces; and extending, by the processing module, the plurality of three-dimensional coordinate points according to a predetermined trajectory and the light pattern; wherein the plurality The three-dimensional coordinate points are formed to include at least one light-emitting surface and a cross-section. When the light-emitting surface is disposed by the processing module to be non-horizontal, the illumination range is enlarged or reduced relative to the horizontal setting. The lens design method of claim 4, wherein the cross section extends according to the predetermined trajectory. The lens design method of claim 4, wherein the plurality of three-dimensional coordinate points extending are applicable to at least one light source.