CN115992947A

CN115992947A - Laser projection lighting optical system

Info

Publication number: CN115992947A
Application number: CN202111217209.XA
Authority: CN
Inventors: 曾庆兵; 张磊
Original assignee: Shanghai Aviation Electric Co Ltd
Current assignee: Shanghai Aviation Electric Co Ltd
Priority date: 2021-10-19
Filing date: 2021-10-19
Publication date: 2023-04-21

Abstract

The invention discloses a laser projection lighting optical system, which comprises a laser energy source, a fluorescent material, a converging and collimating device, a convex lens array and a concave lens array, wherein the convex lens array adopts a plano-convex form, the middle plane of the convex lens array is an incident plane, the middle convex surface of the convex lens array is an emergent plane, the concave lens array adopts a plano-concave form, the middle concave surface of the concave lens array is an incident plane and is opposite to the middle convex surface of the convex lens array, and the middle plane of the concave lens array is an emergent plane, wherein the middle concave surface of the concave lens array and the middle convex surface of the convex lens array are complementarily designed. The invention has the beneficial effects that: the system has high overall efficiency, simple structure and low cost, can be applied to various illumination fields, and has high light energy utilization rate and more obvious energy-saving effect compared with the illumination optical system of the traditional light source.

Description

Laser projection lighting optical system

Technical Field

The invention relates to the field of laser illumination, in particular to a laser projection illumination optical system.

Background

Compared with LED illumination and traditional illumination, the laser illumination has high photoelectric conversion efficiency and high effective light energy utilization rate, and has wide application prospect in the field of green energy-saving illumination. At present, the laser illumination is mainly applied to industrial occasions such as long-distance strong light illumination, automobile high beam fields and the like, and the occasions fully show the advantages of high brightness, high light intensity and long-distance linear light source of the laser illumination. In the wide general illumination application field, the design of the laser general illumination light source into a planar light source can further realize the expansion of laser illumination application occasions. Compared with LED illumination and other traditional light sources, the high-brightness light source based on laser illumination has the unique advantages of easier collimation and the like.

Disclosure of Invention

The invention aims to solve the problem that the illumination light source in the prior art adopts LEDs, and provides a novel laser projection illumination optical system.

In order to achieve the purpose, the technical scheme of the invention is as follows: the laser projection lighting optical system comprises a laser energy source, a fluorescent material, a converging and collimating device, a convex lens array and a concave lens array, wherein the convex lens array adopts a plano-convex form, the middle plane of the convex lens array is an incident plane, the middle convex surface of the convex lens array is an emergent plane, the concave lens array adopts a plano-concave form, the middle concave surface of the concave lens array is an incident plane and is opposite to the middle convex surface of the convex lens array, and the middle plane of the concave lens array is an emergent plane, wherein the concave surface of the concave lens array and the convex surface of the convex lens array are complementarily designed, the fluorescent material converts laser energy provided by the laser energy source into general light energy, and the general light energy is focused and collimated by the converging and collimating device and then sequentially passes through the convex lens array and the concave lens array;

and the distance between the convex surface in the convex lens array and the concave surface in the concave lens array is changed to realize the beam angle adjustment of the general light energy.

As the preferred scheme of laser light projector illumination optical system, still include, the laser reflector, the incident side of laser reflector has been arranged laser energy source, laser condensing lens, laser even light lens, the laser energy that the laser energy source provided is through the laser condensing lens reaches after the laser even light lens the laser reflector, the play optical side of laser reflector has been arranged the fluorescent material, the play optical side of fluorescent material has been arranged the collection collimating device.

As the preferable scheme of the laser projection illumination optical system, the converging and collimating device consists of a free-form surface lens and a collimating lens.

As the preferable scheme of the laser projection illumination optical system, the converging and collimating device consists of a reflecting bowl and a collimating lens.

As a preferable mode of the laser projection lighting optical system, the laser mirror is integrated with the collimator lens.

Compared with the prior art, the invention has the beneficial effects that: the adjustment of the distance between the convex lens array and the concave lens array realizes the free change of the beam angle of the general light energy, the general light energy generated by exciting the fluorescent material by the laser is subjected to space asymmetric light distribution design, the system has high overall efficiency, simple structure and low cost, can be applied to various illumination fields, and has high light energy utilization rate and more obvious energy-saving effect compared with an illumination optical system of a traditional light source.

Drawings

Fig. 1 is a schematic diagram of the present invention.

Fig. 2 is a schematic structural diagram of embodiment 1 of the present invention.

Fig. 3 is a schematic structural diagram of embodiment 2 of the present invention.

Detailed Description

The invention will be described in further detail below with reference to the accompanying drawings of specific embodiments. The description of these embodiments is provided to assist understanding of the present invention, but is not to be construed as limiting the present invention. In addition, the technical features of the embodiments of the present invention described below may be combined with each other as long as they do not collide with each other.

Referring to fig. 1, a laser projection illumination optical system is shown.

The laser projection lighting optical system consists of a laser energy source 1, a fluorescent material 2, a converging and collimating device (comprising a converging device 3 and a collimating device 4), a convex lens array 5, a concave lens array 6 and the like. The convex lens array 5 takes the form of a plano-convex. The plane in the convex lens array 5 is an incident plane. The convex surface in the convex lens array 5 is an emergent surface. The concave lens array 6 takes the form of a plano-concave. The concave surface of the concave lens array 6 is an incident surface and is opposite to the convex surface of the convex lens array 5. The middle plane of the concave lens array 6 is an emergent plane. Wherein the concave surface of the concave lens array 6 and the convex surface of the convex lens array 5 are complementarily designed (i.e. the curvature absolute values of the concave lens array and the convex lens array are equal and opposite in sign). The fluorescent material 2 converts the laser energy provided by the laser energy source 1 into general light energy. The general light energy is focused and collimated by the converging and collimating device and then sequentially passes through the convex lens array 5 and the concave lens array 6.

The beam angle adjustment of the general light energy is achieved by changing the spacing between the convex surface in the convex lens array 5 and the concave surface in the concave lens array 6. When the distance between the convex surface in the convex lens array 5 and the concave surface in the concave lens array 6 is shortened to be close to 0, the beam angle reaches a minimum value.

Example 1:

referring to fig. 2, a laser light transmissive illumination system is shown. The laser light-transmitting illumination system consists of a laser energy source 1, a fluorescent material 2, a converging and collimating device, a convex lens array 5, a concave lens array 6, a laser reflector 7, a laser condensing lens 8, a laser light homogenizing lens 9 and the like. The incidence side of the laser reflector 7 is provided with the laser energy source 1, the laser condensing lens 8 and the laser homogenizing lens 9. The laser energy provided by the laser energy source 1 passes through the laser condensing lens 8 and the laser homogenizing lens 9 and then reaches the laser reflector 7. The light exit side of the laser mirror is arranged with the fluorescent material 2. The light-emitting side of the fluorescent material 2 is provided with the converging collimating means. The converging and collimating device consists of a free-form surface lens 3 and a collimating lens 4. The free-form surface lens 3 may be made of optical glass or quartz, and is used for collecting and converging the general light energy emitted by the fluorescent material 2 within a half space range of 180 degrees, and transmitting the energy to the incident surface of the collimating lens 4.

Example 2:

referring to fig. 3, a laser light transmissive illumination system is shown.

The laser light-transmitting illumination system consists of a laser energy source 1, a fluorescent material 2, a converging and collimating device, a convex lens array 5, a concave lens array 6, a laser reflector 7, a laser condensing lens 8, a laser light homogenizing lens 9 and the like. The incidence side of the laser reflector 7 is provided with the laser energy source 1, the laser condensing lens 8 and the laser homogenizing lens 9. The laser energy provided by the laser energy source 1 passes through the laser condensing lens 8 and the laser homogenizing lens 9 and then reaches the laser reflector 7. The light exit side of the laser mirror is arranged with the fluorescent material 2. The light-emitting side of the fluorescent material 2 is provided with the converging collimating means. The converging and collimating device consists of a reflecting bowl 3 and a collimating lens 4.

While only embodiments of the invention have been shown and described in detail, it is not intended that the scope of the invention be limited thereby. It should be noted that it will be apparent to those skilled in the art that several variations and modifications can be made without departing from the spirit of the invention, which are all within the scope of the invention. Accordingly, the scope of protection of the present invention is to be determined by the appended claims.

Claims

1. The laser projection lighting optical system is characterized by comprising a laser energy source, a fluorescent material, a converging and collimating device, a convex lens array and a concave lens array, wherein the convex lens array adopts a plano-convex form, the middle plane of the convex lens array is an incident plane, the middle convex surface of the convex lens array is an emergent plane, the concave surface of the concave lens array is an incident plane and is opposite to the middle convex surface of the convex lens array, the middle plane of the concave lens array is an emergent plane, the concave surfaces of the concave lens array and the convex surfaces of the convex lens array are complementarily designed, the fluorescent material converts laser energy provided by the laser energy source into general light energy, and the general light energy is focused and collimated by the converging and collimating device and then sequentially passes through the convex lens array and the concave lens array;

2. The laser projection lighting optical system of claim 1, further comprising a laser reflector, wherein the laser energy source, the laser condensing lens and the laser homogenizing lens are arranged on the incident side of the laser reflector, the laser energy provided by the laser energy source passes through the laser condensing lens and the laser homogenizing lens and then reaches the laser reflector, the fluorescent material is arranged on the light emitting side of the laser reflector, and the converging collimating device is arranged on the light emitting side of the fluorescent material.

3. The laser projection lighting optical system of claim 1 or 2, wherein the converging collimating device is composed of a free-form surface lens and a collimating lens.

4. The laser projection lighting optical system of claim 1 or 2, wherein the converging and collimating device is composed of a reflecting bowl and a collimating lens.

5. The laser light projector illumination optical system of claim 3 or 4, wherein the laser light reflecting mirror is integral with the collimator lens.