CN220601308U - Novel light beam lamp lens of structure - Google Patents

Abstract

The utility model relates to a novel-structure beam lamp lens, which comprises a first lens group G1, a second lens group G2 and a third lens group G3, wherein the first lens group G1 is positioned at the front part, the second lens group G2 is positioned at the middle part, the third lens group G3 is positioned at the rear part, the focal power of the first lens group G1. is positive, the focal length f1 of the first lens group is satisfied with the focal length f ratio of the whole lens, f1/f is greater than 0.7, the focal length f2 of the second lens group G2 is negative, the focal length f2 is satisfied with the focal length f of the whole lens, -0.52> f2/f > -0.72, and the focal power of the third lens group G3 is satisfied with the focal length f3 of the first lens and the focal length f of the whole lens, and f3/f is greater than 0.64. The light-emitting lens group is simple in structure and can be used for being used as a waterproof beam lamp; and meanwhile, imaging definition of a plurality of positions can be realized.

Description

Novel light beam lamp lens of structure

Technical Field

The utility model relates to the technical field of beam lamp lenses, in particular to a beam lamp lens with a novel structure.

Background

The lens with light-emitting angle smaller than 3 degrees is generally called a beam lens in the stage lighting industry, the beam lamp has larger light-emitting lens because of the small light-emitting angle, and the light rays from the lens are slammed like a thick light column, thus obtaining the name beam lamp, the existing beam lamp lens consists of the following 2 structures, both the structures have the advantages and the disadvantages,

the first is an integral structure, as shown in figure 1, the integral structure is composed of three lenses and then assembled by hardware, and an integral lens group is formed, so that the integral lens group has the advantages of integrally focusing, ensuring that most of the application occasions with different projection distances of the beam lamp can focus, ensuring clear and consistent patterns, and the defects that 1) the aperture is not too large, only can be below 130mm, 2) the aperture of the three lenses is basically consistent, 3) the weight of the lens group is large, because of integrally focusing, the weight of the lens group is large, and the motor load is large, 4) the lamp cannot be made into a waterproof structure, and 5) the angle is too small, so that the integral lens group is generally applied to the beam lamp below 230W.

The second type of split structure is shown in fig. 2 and 3. The group structure generally has a single sheet of crown glass and a fixed distance from the aperture, the focusing lens group is a lens group composed of 2 or 3 sheets of lenses, focusing is carried out by moving the focusing group length, and the advantages are that 1) the aperture can be more than 200 mm.2) the front lens is fixed, the focusing group can be placed inside the lamp, thus the waterproof structure can be made.3) the focusing group is smaller than the light-emitting lens with smaller integral weight, compared with the integral structure lens, the motor burden is smaller.4) the light-emitting lens is thinner at the same time, compared with the integral structure lens with the lower aperture, the larger aperture is the larger the cost is, 5) the total optical length is shorter than the integral structure is short, and the total length is fixed.

The grouping structure is designed according to different wattage of the lamp and actual application places, and the grouping structure is the most used beam lens in the market due to cost and lamp structure.

According to the advantages and disadvantages of the two structures, a new structure is provided to meet the advantages and disadvantages, and most of the disadvantages can be solved.

Disclosure of Invention

The present utility model is directed to a novel structure of a lens of a beam lamp, so as to solve the problems set forth in the background art.

In order to achieve the above purpose, the present utility model provides the following technical solutions: the utility model provides a beam lamp camera lens of novel structure, beam lamp camera lens includes first lens group G1, second lens group G2, third lens group G3, first lens group G1 is fixed in the front portion, and second lens group G2 is fixed in the middle part, and third lens group G3 is movable in the rear portion, first lens group G1. its focal length f1 and the focal length f ratio of whole camera lens satisfy, f1/f >0.7, and second lens group G2 focal length f2 is negative, and focal length f2 and the focal length f ratio of whole camera lens satisfy, -0.52> f2/f > -0.72, and third lens group G3 focal length is positive its focal length f3 and the focal length f ratio of whole camera lens satisfy, f3/f >0.64.

Preferably, the first lens group G1 is composed of a lens L1, a lens L2, and a lens L3, and the lens L1 is composed of a surface S1 and a surface S2, wherein the focal power is positive, and the surface S1 and the surface S2 are both convex surfaces; the lens L2 consists of a surface S3 and a surface S4, the focal power of the lens is positive, the surface S3 is a convex surface, and the surface S4 is a plane; the lens L3 consists of a surface S4 and a surface S5, wherein the surface S4 is a plane, the surface S5 is a concave surface, and the focal power of the concave surface is negative; where the surface S4 is the common plane of the lenses L2 and L3.

Preferably, lens L1 and lens L2 are crown optical glasses, lens L3 is a flint or heavy flint optical glass; the lens L2 and the lens L3 are connected in a glued form.

Preferably, the second lens group G2 is composed of a lens L4 and a lens L5, wherein the focal power of the lens L4 is negative, the focal power of the lens L5 is positive, the lens L4 is composed of a surface S6 and a surface S7, the focal power of the lens L4 is negative, the surface S6 and the surface S7 are both concave, the lens L5 is composed of a surface S7 and a surface S8, the focal power of the lens L5 is positive, the surface S7 is convex, the surface S8 is concave, and the surface S7 is the common plane of the lenses L4 and L5.

Preferably, the lens L4 is flint or heavy flint optical glass and the lens L5 is crown or heavy crown optical glass.

Preferably, the third lens group G3 is composed of a lens L6 and is composed of a surface S9 and a surface S10, and the surface S7 is a convex surface and the surface S8 is a concave surface.

Preferably, the lens L4 is heavy flint glass.

Compared with the prior art, the utility model has the beneficial effects that:

the light emergent lens group (the first lens group G1 and the second lens group G2) is fixed, the focusing group (the first lens group G3) is simple in structure, light and convenient, has little motor burden and can be used for making a waterproof beam lamp; meanwhile, imaging definition of a plurality of positions can be realized, particularly, imaging with a projection distance of more than 5 meters can be actually and clearly realized, and in addition, the utility model is insensitive to the installation position and the total optical length; the aperture of the light beam can be 200mm (most of light beams in the market are within 200 mm), and the light beam is thicker.

Drawings

FIG. 1 is a prior art beam lens of unitary construction;

FIG. 2 is a prior art beam lens of grouping structural formula 1;

FIG. 3 is a prior art beam lens of grouping structural formula 2;

FIG. 4 is a schematic diagram of the structure of the present utility model;

FIG. 5 is a ray diagram of the present utility model;

FIG. 6 is a graph of an 8 meter projection distance optical data provided by the present utility model;

FIG. 7 is a plot of 8 meter projected distance points provided by the present utility model;

FIG. 8 is a graph of the aberration of the projected distance of 8 meters according to the present utility model;

FIG. 9 is a 20 meter projected distance optical data table provided by the present utility model;

FIG. 10 is a plot of 20 meter projected distance points provided by the present utility model;

FIG. 11 is a graph of the aberration of the projected distance of 20 meters according to the present utility model;

FIG. 12 is a 100 meter projection distance optical data table provided by the present utility model;

FIG. 13 is a plot of 100 meter projected distance points provided by the present utility model;

FIG. 14 is a view showing the aberration of 100 m projected distance in the vertical axis provided by the present utility model;

the reference numerals in the figure indicate 1 optical aperture or pattern disc, 2 pattern disc.

Detailed Description

The technical solution in one embodiment of the present utility model will be clearly and completely described below with reference to the accompanying drawings in the embodiment of the present utility model.

Please refer to fig. 1-14: the utility model provides a novel light beam lamp camera lens of structure which characterized in that: the beam lamp lens comprises a first lens group G1, a second lens group G2 and a third lens group G3, wherein the first lens group G1 is fixedly arranged at the front part, the second lens group G2 is fixedly arranged at the middle part, the third lens group G3 is movably arranged at the rear part, the focal power of the first lens group G1. is positive, the focal length f1 of the first lens group is satisfied with the focal length f ratio of the whole lens, f1/f >0.7, the focal power of the second lens group G2 is negative, the focal length f2 is satisfied with the focal length f of the whole lens, -0.52> f2/f > -0.72, and the focal length f3 of the third lens group G3 is satisfied with the focal length f ratio of the positive focal length f3 and the whole lens, and f3/f >0.64. The utility model can realize clear imaging at a plurality of positions, and meanwhile, the third lens group G3 can be movably arranged at the rear part, so that for different projection distances, different pattern discs can meet the requirements only by moving the third lens group G3.

The first lens group G1 consists of a lens L1, a lens L2 and a lens L3, wherein the lens L1 consists of a surface S1 and a surface S2, the focal power of the lens is positive, and the surface S1 and the surface S2 are convex; the lens L2 consists of a surface S3 and a surface S4, the focal power of the lens is positive, the surface S3 is a convex surface, and the surface S4 is a plane; the lens L3 consists of a surface S4 and a surface S5, wherein the surface S4 is a plane, the surface S5 is a concave surface, and the focal power of the concave surface is negative; wherein the surface S4 is the common surface of lenses L2 and L3; lenses L1 and L2 are crown optical glasses, and lens L3 is flint or heavy flint optical glass; the lens L2 and the lens L3 are connected in a glued form. The lenses L1 and L2 are crown optical glass, and the caliber is larger, the crown optical glass is relatively low in price, and the lens L3 is heavy flint optical glass, so that the caliber can be reduced, the weight can be reduced, and the cost can be reduced due to the fact that the unit price of flint or heavy flint optical glass is relatively high, and the flint or heavy flint optical glass is placed at the position L3. In addition, the lenses L2 and L3 are in a cemented form to reduce chromatic aberration thereof.

The second lens group G2 is composed of a lens L4 and a lens L5, wherein the focal power of the lens L4 is negative, the focal power of the lens L5 is positive, the lens L4 is composed of a surface S6 and a surface S7, the focal power of the lens L4 is negative, the surface S6 and the surface S7 are concave, the lens L5 is composed of a surface S7 and a surface S8, the focal power of the lens L5 is positive, the surface S7 is convex, the surface S8 is concave, and the surface S7 is the common plane of the lenses L4 and L5. The lens L4 is flint or heavy flint optical glass, the lens L5 is crown or heavy crown optical glass,

the third lens group G3 is composed of a lens L6, and is composed of a surface S9 and a surface S10, wherein the surface S7 is a convex surface, the surface S8 is a concave surface, and the lens L4 is heavy flint glass.

The foregoing description is only illustrative of the present utility model and is not intended to limit the scope of the utility model, and all equivalent structures or equivalent processes or direct or indirect application in other related technical fields are included in the scope of the present utility model.

Claims (7)

1. The utility model provides a novel light beam lamp camera lens of structure which characterized in that: the beam lamp lens comprises a first lens group G1, a second lens group G2 and a third lens group G3, wherein the first lens group G1 is fixedly arranged at the front part, the second lens group G2 is fixedly arranged at the middle part, the third lens group G3 is movably arranged at the rear part, the focal power of the first lens group G1. is positive, the focal length f1 of the first lens group is satisfied with the focal length f ratio of the whole lens, f1/f >0.7, the focal power of the second lens group G2 is negative, the focal length f2 is satisfied with the focal length f of the whole lens, -0.52> f2/f > -0.72, and the focal length f3 of the third lens group G3 is satisfied with the focal length f ratio of the positive focal length f3 and the whole lens, and f3/f >0.64.

2. The novel structured beam lamp lens as claimed in claim 1, wherein: the first lens group G1 consists of a lens L1, a lens L2 and a lens L3, wherein the lens L1 consists of a surface S1 and a surface S2, the focal power of the lens is positive, and the surface S1 and the surface S2 are convex; the lens L2 consists of a surface S3 and a surface S4, the focal power of the lens is positive, the surface S3 is a convex surface, and the surface S4 is a plane; the lens L3 consists of a surface S4 and a surface S5, wherein the surface S4 is a plane, the surface S5 is a concave surface, and the focal power of the concave surface is negative; where the surface S4 is the common plane of the lenses L2 and L3.

3. The novel structured beam lamp lens as claimed in claim 2, wherein: the lens L1 and the lens L2 are crown optical glass, and the lens L3 is flint or heavy flint optical glass; the lens L2 and the lens L3 are connected in a glued form.

4. The novel structured beam lamp lens as claimed in claim 1, wherein: the second lens group G2 is composed of a lens L4 and a lens L5, wherein the focal power of the lens L4 is negative, the focal power of the lens L5 is positive, the lens L4 is composed of a surface S6 and a surface S7, the focal power of the lens L4 is negative, the surface S6 and the surface S7 are concave, the lens L5 is composed of a surface S7 and a surface S8, the focal power of the lens L5 is positive, the surface S7 is convex, the surface S8 is concave, and the surface S7 is the common plane of the lenses L4 and L5.

5. The novel structured beam lamp lens as claimed in claim 4, wherein: the lens L4 is flint or heavy flint optical glass, and the lens L5 is crown or heavy crown optical glass.

6. The novel structured beam lamp lens as claimed in claim 1, wherein: the third lens group G3 is composed of a lens L6 and a surface S9 and a surface S10, wherein the surface S7 is a convex surface, and the surface S8 is a concave surface.

7. The novel structured beam lamp lens as claimed in claim 5, wherein: the lens L4 is heavy flint glass.