| dc.description.abstract | In this thesis, a one-dimensional cylindrical lens array (Cylindrical Lens Array, CLA) is used for refractive and reflective optical elements to design high-contrast light patterns. Discuss the exclusive light pattern design applicable to the cylindrical lens array, and try to move the bright spot of the light pattern upward in order to increase the contrast of the near light pattern.
In the design of the refractive optical element combined with the cylindrical lens array, first, evaluate the etendue of the light source and the volume of the refractive optical element, and find out the suitable segment for shaping the high-contrast light pattern. By analyzing the divergence angle of the light beams emitted by different segments of the refractive optical element, and considering the influence of the light emitted by the cylindrical lens array on the different segments, after the horizontal direction is developed, the influence on the vertical light pattern distribution. The cut-off line light pattern is designed by using the light output area with a small vertical distribution range; and for the segment that is not conducive to shaping the light pattern, in order to effectively use the energy of the light source, this thesis guides the light with a large divergence angle to the other surface to provide the fully illuminance.
Combined with the design of the reflective optical element of the cylindrical lens array, the degree of freedom of the light pattern design is higher by using the reflector, and the light pattern design exclusive to the cylindrical lens array is analyzed. Since the cylindrical lens has a linear shift-invariant to the light pattern distribution response of the collimated light, the light type generated by the reflector can be convoluted with the distribution function of the cylindrical lens array to calculate the output light pattern. This result is related to the simulated light pattern. The NCC value is as high as 99.5%. | en_US |