A free-form surface and aspheric beam shaping device and method

By designing free-form surface and aspheric beam shaping devices, the problems of incident beam distribution limitation and system non-universality in the existing technology are solved, and flexible control of light distribution and collimated beam output are achieved, which is suitable for multiple light sources and high-power scenarios.

CN119376097BActive Publication Date: 2025-09-05JIANGNAN UNIV
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Patent Information

Application Number
CN202411646167.5
Authority / Receiving Office
CN · China
Patent Type
Patents(China)
Current Assignee / Owner
Filing Date
2024-11-18
Publication Date
2025-09-05
Estimated Expiration
2044-11-18

AI Technical Summary

Technical Problem

Existing technologies are difficult to adapt to free-form beam shaping with arbitrarily distributed incident light beams. Transmission and reflection designs are not universal, and there is a lack of multi-light source and multi-beam system designs. The situation where the optical extension is not zero is complex, making it difficult to achieve beam shaping with a specific aperture shape.

Method used

A free-form surface and aspheric beam shaping device and method are designed. They are suitable for various incident beam apertures, can design both transmissive and reflective light distribution control, and are suitable for multi-light source and multi-beam systems. By optimizing the target surface grid and calculating the normal vector field, precise control of light distribution is achieved.

Benefits of technology

It realizes flexible control of light distribution, is suitable for incident light beams and target surface spots of different sizes, can output specific irradiance distribution and collimated light beam, and is suitable for high-power light distribution control scenarios.

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Abstract

The present invention discloses a free-form surface beam shaping device and method, which belongs to the technical field of light distribution control. The free-form surface beam shaping method provided by the present invention first generates a standardized incident and exit surface grid distribution map, then maps the standardized incident and exit grid distribution map to the free-form surface and the target surface respectively, and then calculates the normal vector of the corresponding sampling point on the free-form surface according to the direction of the incident light and the exit light, and calculates each sampling point on the free-form surface based on the normal vector. This method can design free-form surface optical elements to control light distribution. By integrating the designed free-form surface optical elements into an optical element array, the light distribution of multiple light beams can be controlled. This design method has strong versatility, and can be used to design free-form surface light distribution control for multiple light sources and multiple light beams, so that it can be applied in high-power application scenarios, and can achieve precise control of non-zero expansion beams.
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