TIR collimating lens contour simulation method

Abstract

The invention discloses a TIR collimating lens contour simulation method, and relates to the technical field of lenses. The method comprises the following step (1) of obtaining the condition that stray light is not generated according to a reflection law, a refraction law and a relation between reflectivity and polarization; the step (2) of calculating the value range of an incident angle theta i according to the condition that the stray light is not generated; calculating alpha 1 according to the incident angle theta i, and taking a constant value; calculating theta 3 according to the incident angle theta i and the constant value alpha 1, and taking the constant value; calculating alpha 2 + alpha 3 according to the alpha 1, selecting the constant value for the alpha 3, and calculating the value of the alpha 2 since the alpha 1 is the constant value; calculating alpha 3 - theta 2 according to the incident angle theta i, calculating theta 2 since the alpha 3 is a constant value, and taking the constant value; selecting the theta 1 as a constant value according to the manufacturing requirements; and the step (3) of selecting an initial point according to the values of alpha 1, alpha 2, alpha 3, theta 1 and theta 2, and drawing the contour of a TIR collimating lens. The simulation method has the beneficial effects that the stray light can be effectively removed through the designed lens, and the height of the lens can be further reduced.

Description

technical field [0001] The invention relates to the field of lens technology, in particular to a TIR collimating lens profile simulation method. Background technique [0002] The beam angle of the direct output light of the LED light source is relatively large, and when performing long-distance lighting, the light received by the target surface is relatively small. The related solution is to add a TIR collimator lens in front of the LED light source. The original larger beam angle is constrained to a smaller range by the TIR collimator lens. However, after the light emitted by the LED light source passes through the TIR collimator lens, Although the beam angle is significantly reduced, a lot of stray light appears. [0003] Although the relevant improved TIR collimating lens can effectively remove stray light, in order to smoothly install the improved TIR collimating lens on the light source, it is necessary to ensure that the size of the bottom opening is greater than the ...

AI Technical Summary

Problems solved by technology

[0005] Although the TIR collimating lens can effectively remove stray light, but the technical problem of the high height of the lens, the present invention provides a TIR collimating lens profile simulation method , the lens designed by it can not only effectively remove stray light, but also reduce the height of the lens

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