LED free-form surface lens array device for uniform illumination of inclined surfaces

Abstract

The invention discloses an LED free-form surface lens array device for uniform illumination of inclined surfaces, belonging to the technical field of non-imaging optical and laser beam shaping. The device comprises free-form surface lens units (U) and LED light source units (V) arranged uniformly in rows and columns; the free-form surface lens units (U) have the same shape, and the LED light source units (V) also have the same shape, the curved lens units (U) and the LED light source units (V) are the same in quantity and are in one-to-one correspondence; the optical axis of each LED light source unit and the optical axis of the corresponding free-form lens unit are coincided, the emitting light of the LED light source units are deflected through the corresponding free-form surface lens units to generate determined uniform light distribution on inclined illumination surfaces, and the free-form surface lens units can be achieved by the materials such as optical resin by the means of theinjection moulding technology. The LED free-form surface lens array device is compact and simple in structure, good in shaping effect, high in energy utilization rate, high in practicability and widein application range.

Description

technical field [0001] The invention relates to the technical field of non-imaging optics and illumination, in particular to an LED free-form surface lens array device for uniform illumination of inclined surfaces. Background technique [0002] Different from traditional coaxial lighting, oblique lighting removes the coaxial limitation and greatly improves the flexibility of lighting. It has a wide range of applications in practice, such as urban road lighting, tunnel lighting, and urban landscape lighting. In order to improve the light intensity, the practical oblique lighting system is generally formed by arraying a group of beam shaping lens units. Since each beam shaping lens unit is identical, the key to designing an oblique illumination system is to design a single beam shaping lens unit. The beam shaping lens unit redistributes the light output from the light source with the help of a certain optical curved surface. Compared with traditional optical curved surfaces,...

AI Technical Summary

Problems solved by technology

The above methods have been extensively studied in the beam shaping of coaxial freeform surfaces, but they cannot solve the problem of non-coaxial oblique illumination well.

Using the coaxial designed lighting system for inclined surface lighting will inevitably lead to the actual light distribution on the inclined surface significantly deviating from the predetermined light distribution, which cannot meet the actual inclined lighting requirements; the effective distribution of energy cannot be realized, which will inevitably lead to energy waste

Images