CN210951175U

CN210951175U - Searchlight TIR lens and TIR lens module

Info

Publication number: CN210951175U
Application number: CN201922017297.3U
Authority: CN
Inventors: 岑松原; 赵亮; 马昊辰; 王炜; 楼民
Original assignee: Hunan Yuanxin Optoelectronics Technology Co ltd; Zhejiang Blue Sea Optical Technology Co ltd; Hangzhou Changsong Optics Co ltd
Current assignee: Hunan Yuanxin Optoelectronics Technology Co ltd; Zhejiang Blue Sea Optical Technology Co ltd; Hangzhou Changsong Optics Co ltd
Priority date: 2019-11-21
Filing date: 2019-11-21
Publication date: 2020-07-07
Anticipated expiration: 2029-11-21

Abstract

The utility model discloses a TIR lens for searchlight and TIR lens module thereof, which comprises a lens body, wherein the lens body is rectangular when overlooked; the lens body comprises a first incident surface, a first emergent surface, a second incident surface, a second emergent surface, a total reflection surface, a transition surface and a connecting surface. The first emergent surface is arched; the second emergent surface is annular and is connected with the first emergent surface through the inverted cone-shaped transition surface, so that the first emergent surface is positioned inside the second emergent surface. The first incident surface and the first emergent surface form a first light path, so that part of light enters the lens from the first incident surface and is emitted from the first emergent surface to reach the irradiation surface. The second incident surface, the second emergent surface and the total reflection surface form a second light path, so that the other part of light enters the lens from the second incident surface, is emitted from the second emergent surface through the total reflection surface, is superposed with the irradiation brightness and reaches the irradiation surface. The utility model discloses in reduce the lens quality, increased actual light-emitting area, improve the regional illuminance in center.

Description

Searchlight TIR lens and TIR lens module

Technical Field

The utility model relates to a lens field, concretely relates to searchlight TIR lens and TIR lens module.

Background

The TIR lens used as the searchlight at present is generally a shoe-shaped TIR lens, the TIR lens is of a rotational symmetry structure about a central shaft, and the top view is circular, so that when the lens module is formed, the junction of four adjacent lenses is greatly wasted, for the searchlight with a limited caliber size, the central illumination of the target surface of the searchlight can be further improved, and the lens module formed by the shoe-shaped TIR also can cause the mass of the whole lens module to be larger.

SUMMERY OF THE UTILITY MODEL

The utility model aims at providing a lens can solve one or more among the above-mentioned technical problem.

In order to achieve the above object, the present invention provides the following technical solutions:

a TIR lens for a searchlight, comprising a lens body which is rectangular in plan view; the lens body comprises a first incident surface, a first emergent surface, a second incident surface, a second emergent surface, a total reflection surface, a transition surface and a connecting surface.

The first emergent surface is arched; the second emergent surface is annular and is connected with the first emergent surface through the inverted cone-shaped transition surface, so that the first emergent surface is positioned inside the second emergent surface.

The first incidence surface is in a lower arc shape and is connected with the total reflection surface through a second incidence surface; the total reflection surface is connected with the second emergent surface through the connecting surface.

The first incident surface and the first emergent surface form a first light path, so that part of light enters the lens from the first incident surface and is emitted from the first emergent surface to reach the irradiation surface. The second incident surface, the second emergent surface and the total reflection surface form a second light path, so that the other part of light enters the lens from the second incident surface, is emitted from the second emergent surface through the total reflection surface, is superposed with the irradiation brightness and reaches the irradiation surface.

The optimal value of the arch height is the minimum value of the arch height which can be obtained in the range of the opening at the upper end of the transition surface under the condition that the central illumination of the target surface of the searchlight is not changed. This can reduce the quality of the lens to the maximum.

An LED light source is placed in the center of the bottom of a total reflection surface, small-angle conical light beams of an LED firstly enter an incident surface at the bottom of the lens, enter the inside of the lens after being refracted, reach a first emergent surface of the lens and then are refracted to a target surface; the light with large angle passes through the cylindrical surface at the bottom of the lens, enters the inside of the lens after being refracted, is incident on the total reflection surface, is incident on the annular second emergent surface at the edge of the lens after being totally reflected, and is refracted to the target surface again. The lens is here preferably a TIR lens.

Further: the second incident surface is a cylindrical surface.

Further: the arc height of the incident surface is H1, the height of the cylindrical surface is H2, and H1 is less than H2. The LED light source can be effectively ensured to refract light to the illumination area through the lens. Preferably a single-sided illumination LED light source is selected.

Further: the arc height of the first emergent surface is H3, the height of the transition surface is H4, and H4 is less than H3.

Further: and the included angle between the total reflection surface and the horizontal plane is A, then: a is more than 0 degree and less than 90 degrees. Ensuring that total reflection occurs.

Further: the included angle between the second emergent surface and the horizontal plane is B, then: a is more than 90 degrees and less than 180 degrees. The light rays emitted from the second emergent surface can be overlapped with the light rays emitted from the first emergent surface, and the illuminance of the central area is increased.

Further: the connecting surface is a vertical plane, the number of the connecting surfaces is 4, and the included angle between two adjacent connecting surfaces is 90 degrees.

Further: the center of the incident surface, the center of the first emergent surface and the annular center of the second emergent surface are all located on the same axis.

A TIR lens module for searchlight comprises a plurality of single lenses.

The technical effects of the utility model are that:

1. the first incident surface is set into a lower arc shape, so that the height of the first emergent surface matched with the first incident surface is reduced, the first emergent surface moves down as much as possible in a movable range, the minimum value with the highest brightness of the irradiated surface is selected in the moving down process, the quality of the lens is reduced under the condition of not changing a light path, and the quality of the whole lens module is further reduced;

2. the lens is cut into a rectangle (a rectangle or a square, preferably a square), the first emergent surface and the second emergent surface are combined to be in a limited searchlight caliber, the actual emergent light area is increased, the advantage is that the illumination of the central area of the spot of the searchlight is improved, the lost energy only affects the illumination of the area outside the target surface, and the effective spot is the central area for a high-power searchlight.

Drawings

The accompanying drawings, which form a part of the present application, are included to provide a further understanding of the invention, and are incorporated in and constitute a part of this specification, illustrate embodiments of the invention and together with the description serve to explain the invention and not to limit the invention.

In the drawings:

FIG. 1 is a schematic view of a prior art lens;

fig. 2 is a schematic view of the lens structure of the present invention;

FIG. 3 is a more bright schematic view of the light ray overlay central region of FIG. 2;

FIG. 4 is a schematic perspective view of FIG. 2;

fig. 5 is a first schematic view of the lens formation of the present invention;

FIG. 6 is a further schematic illustration of FIG. 5;

fig. 7 is a second schematic view of the lens formation of the present invention;

FIG. 8 is a further schematic illustration of FIG. 7;

FIG. 9 is a schematic structural diagram of the lens module of FIG. 4 in use in a luminaire;

wherein the figures include the following reference numerals:

the LED light source comprises an incident surface 1, a first emergent surface 2, a cylindrical surface 3, a total reflection surface 4, a second emergent surface 5, a connecting surface 6, a transition surface 7, a part of incident light X, the other part of incident light Y, a light central area O and an LED light source 10.

Detailed Description

The invention will be described in detail with reference to the drawings and specific embodiments, wherein the exemplary embodiments and the description are only intended to explain the invention, but not to limit the invention in a proper manner.

It should be noted that the embodiments and features of the embodiments in the present application may be combined with each other without conflict. The present invention will be described in detail below with reference to the accompanying drawings in conjunction with embodiments.

As shown in fig. 1 to 4, a TIR lens for a searchlight includes a lens body which is rectangular in a plan view.

The top view of the lens is not a circle, but is cut into a rectangle (square or rectangle), so that the module lens has higher space utilization rate and higher target surface central illumination in a limited caliber.

The lens body comprises a first incident surface, a first emergent surface, a second incident surface, a second emergent surface, a total reflection surface, a transition surface and a connecting surface.

Compared with the prior art, the utility model discloses with integrative emergent face fall into two independent first emergent faces and second emergent face each other, first emergent face (arch) not directly link to each other with second emergent face (annular), but one section distance of inward movement, through the transition face connection of back taper, under the condition that does not change the chief ray, reduced the height of emergent face, reduced the quality of lens, reduce cost.

The first incidence surface is in a lower arc shape and is connected with the total reflection surface through a second incidence surface; the total reflection surface is connected with the second emergent surface through the connecting surface. The second incident surface is a cylindrical surface, and the upper edge of the cylindrical surface is connected with the first incident surface; the lower edge of the cylindrical surface is connected with the lower edge of the total reflection surface; the upper edge of the total reflection surface is connected with the second emergent surface through the connecting surface.

Two light paths are formed in the square lens, wherein the first light path comprises an incident surface and a first emergent surface, the incident surface is in a lower arc shape, and the first emergent surface is in an arc shape. Part of the light enters the lens from the incident surface and is emitted from the first emergent surface.

The first incident surface and the first emergent surface form a first light path, so that part of light enters the lens from the first incident surface and is emitted from the first emergent surface to reach the irradiation surface. The light is more concentrated in the central area of the illumination.

The second incident surface, the second emergent surface and the total reflection surface form a second light path, so that the other part of light enters the lens from the second incident surface, is emitted from the second emergent surface through the total reflection surface, is superposed with the irradiation brightness and reaches the irradiation surface. And part of the light rays can not enter the lens through the first incident surface, and are refracted through the lens by the second light path to superpose the first light path in the central area, so that the illumination is increased.

The light rays emitted from the second emergent surface refract the large-angle light rays, and the central illumination area is subjected to superposition illumination through the second emergent surface, so that the brightness is better.

Further: the center of the incident surface, the center of the first emergent surface and the annular center of the second emergent surface are all located on the same axis. Ensuring the irradiation angle.

As shown in fig. 5-8, when using with the searchlight, a plurality of the utility model discloses a lens module is constituteed to the lens and is used, this lens is equivalent to at a square (or rectangle of present circular lens inscription, the inscription is extreme position here, can slightly be greater than when actually processing manufacturing and correct squarely, the processing manufacturing of being convenient for), through the structure that changes lens, cut four angles (the shadow area in fig. 5, 7) of lens, under the condition that the regional luminance of illumination improves, the effectual quality that reduces lens for the volume of whole lens module is also littleer.

As shown in fig. 6 and 8, and when a plurality of lenses are combined into a lens module for use, the distance between the central irradiation areas is shortened by 2r-L, wherein fig. 8 shows that the maximum distance can be reached

Is the distance, where r is the existing lens radius, L ≦ r. The illumination areas of the two adjacent light sources are closer to each other, the brightness of the whole illumination surface is more uniform, and the illumination use comfort is improved.

As shown in fig. 9, a TIR lens module for a searchlight includes a plurality of single lenses. The individual lenses are arranged here in a rectangular shape. Can be adjusted according to actual needs.

The above description is only a preferred embodiment of the present invention and is not intended to limit the present invention, and various modifications and changes may be made by those skilled in the art. Any modification, equivalent replacement, or improvement made within the spirit and principle of the present invention should be included in the protection scope of the present invention.

Claims

1. A TIR lens for a searchlight, comprising: the lens comprises a lens body, wherein the lens body is rectangular in plan view; the lens body comprises a first incident surface, a first emergent surface, a second incident surface, a second emergent surface, a total reflection surface, a transition surface and a connecting surface;

the first emergent surface is arched; the second emergent surface is annular and is connected with the first emergent surface through an inverted cone-shaped transition surface, so that the first emergent surface is positioned inside the second emergent surface;

the first incidence surface is in a lower arc shape and is connected with the total reflection surface through a second incidence surface; the total reflection surface is connected with the second emergent surface through the connecting surface;

the first incident surface and the first emergent surface form a first light path, so that part of light enters the lens from the first incident surface and is emitted from the first emergent surface to reach the irradiation surface;

the second incident surface, the second emergent surface and the total reflection surface form a second light path, so that the other part of light enters the lens from the second incident surface, is emitted from the second emergent surface through the total reflection surface, is superposed with the irradiation brightness and reaches the irradiation surface.

2. The TIR lens of claim 1, wherein: the second incident surface is a cylindrical surface.

3. The TIR lens of claim 1, wherein: the center of the incident surface, the center of the first emergent surface and the annular center of the second emergent surface are all located on the same axis.

4. A lens module comprising the TIR lens of claim 1, comprising a plurality of individual lenses.