Wide-angle lens used for uniform near-field illumination

A uniform lighting and wide-angle lens technology, which is applied to the components of lighting devices, lighting devices, lighting and heating equipment, etc., can solve the problems of size limitation, attenuation, and high cost of the light output surface, so as to ensure the uniformity of illumination and increase the light output Angle, the effect of improving edge illumination

Inactive Publication Date: 2015-11-04
HUAQIAO UNIVERSITY +1
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  • Description
  • Claims
  • Application Information

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Problems solved by technology

However, there are low coupling efficiency, high cost, and limited size of the light-emitting surface between the light-emitting diode and the light guide plate, so it is more suitable for small-area light output, such as mobile phones, computer display screens, tablet computers, etc.
In traditional direct lighting, LEDs are directly arranged at the bottom of the target surface. Since

Method used

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  • Wide-angle lens used for uniform near-field illumination
  • Wide-angle lens used for uniform near-field illumination
  • Wide-angle lens used for uniform near-field illumination

Examples

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Example Embodiment

[0035] In order to further explain the technical solution of the present invention, it will be described in detail below with reference to the accompanying drawings.

[0036] figure 1 with figure 2 The lens shown is a wide-angle optical lens with uniform near-field illumination of the present invention, which is made of a transparent material with a refractive index of 1.45-1.6 through an injection molding process. The material is not limited to polycarbonate (PC), polymethyl methacrylate (PMMA).

[0037] Such as figure 2 As shown, in this example, the wide-angle lens is rotationally symmetric about the Z axis. The optical lens includes an inner concave surface 2, an outer convex surface 3, a bottom surface 4, a positioning bracket 5 and a microstructure 7. The light emitting diode 1 is placed directly below the central axis of the bottom of the lens, and the light emitting surface of the light source is flush with the bottom surface. The inner concave surface 2 is the incident...

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Abstract

The invention provides a wide-angle lens used for uniform near-field illumination. The wide-angle lens comprises an inwards concave face, an outwards convex face, a bottom face and a positioning support. The inwards concave face is a light source incident face, is a staged discontinuous curved face and is used for diverging incident light. The outwards convex face is a light emitting face and is determined through distribution of emitted light intensity. The emitted light intensity can be obtained according to the energy conservation formula, and the outwards convex face controls the direction of the emitted light. The bottom face is a reflective face. The lens can effectively increase the light emitting angle of light emitting diodes and improve target surface edge illuminance. By means of the lens, the use number of the light emitting diodes and the distance between the lens and a target surface can be reduced, production cost is reduced to a certain extent, and illuminance uniformity of the target surface can be guaranteed.

Description

technical field [0001] The invention belongs to the field of optical lenses, in particular to a wide-angle lens with uniform illumination in the near field. Background technique [0002] In recent years, light-emitting diodes have the advantages of high efficiency, good light and color performance, and low energy consumption, and have been widely used in indoor and outdoor lighting and backlighting. Among them, panel lights, advertising light boxes and displays in the form of flat light are widely used. [0003] From the structural point of view, the application of planar lighting can be divided into two types: side-type and direct-type lighting. Side-lit lighting requires a light guide plate to reflect the incident light from the LEDs. The side-type lighting is small in size, and the technology of the light guide plate is relatively mature. However, there are low coupling efficiency, high cost, and limited size of the light-emitting surface between the light-emitting diod...

Claims

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Application Information

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IPC IPC(8): F21V5/04
CPCF21V5/04
Inventor 郭震宁连宗山颜稳萍潘诗发
Owner HUAQIAO UNIVERSITY
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