CN110927915A

CN110927915A - Optical lens and method for manufacturing the same

Info

Publication number: CN110927915A
Application number: CN201811098390.5A
Authority: CN
Inventors: 方利卡
Original assignee: Ningbo Sunny Automotive Optech Co Ltd
Current assignee: Ningbo Sunny Automotive Optech Co Ltd
Priority date: 2018-09-20
Filing date: 2018-09-20
Publication date: 2020-03-27

Abstract

The present invention provides an optical lens, comprising: the lens assembly comprises a lens barrel, a lens group, wherein lenses of the lens group are fixed on the lens barrel in a certain order, and at least one spacing medium, wherein the spacing medium is assembled on the surfaces of the lenses of the lens group so as to separate the adjacent lenses of the lens group, the lens group and the spacing medium form a lens group main body relative to the lens barrel, and the axial length of the lens group main body is changed along with the axial length of the inside of the lens barrel. In addition, the invention provides a manufacturing method of the optical lens barrel, under the condition of temperature change, no extra gap is generated in the whole structure, and the problem that the stability of the structure or the stability of the optical performance is threatened due to the looseness of the lens is avoided.

Description

Optical lens and method for manufacturing the same

Technical Field

The present invention relates to an optical device, and more particularly, to an optical lens having a certain temperature adaptability, and a method for manufacturing the optical lens.

Background

The optical lens plays an imaging task in different scenes, and the temperature of the environment where the optical lens is located is rarely constant in life or industrial scenes. Then, the lens as an optical device has to face the temperature change, and even the temperature difference in extreme cases has to affect the structure of the optical lens.

In a conventional optical lens, particularly a fixed focus lens, a lens barrel is manufactured by fastening positions of lenses to each other. In the conventional lens assembly, it is necessary to ensure relative stability between lenses and between the lens and the lens barrel in turn. The structural looseness has a great influence on the performance of the overall optical lens. In severe cases, the optical lens cannot be repaired and discarded directly because abrasion occurs between lenses or between the lenses and the lens barrel, which causes permanent damage.

One common cause of looseness between lenses and lens barrels is that due to temperature changes, the temperature changes can cause thermal expansion and contraction of the lenses and the lens barrels, and the materials of the lenses and the lens barrels are different, so that the degrees of thermal expansion and contraction are different. For example, the lens barrel expands to a large extent due to heat, and the lens barrel expands to a small extent, so that a gap inevitably occurs between the lens barrel and the lens. This gap can cause instability of the overall structure and is to be avoided.

In the existing optical lens, the lens and the lens barrel are made of different materials based on optical requirements and other installation requirements. That is, there is certainly a difference in the thermal expansion coefficient. It is a difficult problem to avoid the temperature affecting the structure.

In the conventional optical lens, as shown in fig. 1, a spacer is used between two adjacent lenses to separate the two adjacent lenses. On the one hand, provides support for mounting between the lenses and, on the other hand, prevents relative rotation between the lenses. That is, the spacer is in close proximity to the adjacent lens. In the case where the lens barrel is deformed due to temperature, the lens is additionally deformed together with the spacer. Similar to the spacer ring being adhered between the lenses, the voids that occur are not filled. At present, the space ring is made of plastic materials, has a small thermal expansion coefficient and does not have elasticity. For example, even if the clearance is larger than 0.01mm during the temperature difference change, the spacer ring cannot fill the clearance, and the risk of loosening still remains.

Under the condition of ensuring that the optical performance is not reduced, the temperature adaptability in a large range is realized by using a structure with cost, and the stability of the structure is realized under the change of temperature difference, which is a problem to be solved at present.

Disclosure of Invention

One of the main advantages of the present invention is to provide an optical lens and a method for manufacturing the same, in which no extra gap is generated in the overall structure under the condition of temperature variation, and the lens is prevented from loosening to threaten the structural stability or the optical performance stability.

Another advantage of the present invention is to provide an optical lens and a method of manufacturing the same, which has structural stability under temperature change and can prevent an additional gap from occurring due to expansion and contraction even if existing materials are used.

Another advantage of the present invention is to provide an optical lens and a method for manufacturing the same, which can supplement a gap that may occur between a lens barrel and a lens while ensuring optical performance, so that the lens barrel and the lens are closely arranged in an axial direction, and the overall structure has no relative friction during use.

Another advantage of the present invention is to provide an optical lens and a method for manufacturing the same, wherein at least one spacer is added to the sequentially arranged lenses, wherein the spacer includes at least one buffer for providing an elastic connection between the lenses and the lens barrel.

Another advantage of the present invention is to provide an optical lens and a method for manufacturing the same, in which the buffer member is matched with an axial length of the entire lens, so that the axial length of the lens and the axial length of the lens barrel are kept consistent, and an additional gap caused by a difference in the axial lengths is avoided.

Another advantage of the present invention is to provide an optical lens and a method for manufacturing the same, in which the buffer member has a recovery tendency in the axial length, and the extension difference between the lens barrel and the entire lens in the axial length under the temperature difference change is compensated by the recovery of the buffer member.

Another advantage of the present invention is to provide an optical lens and a method for manufacturing the same, in which the buffer further balances the positions of adjacent lenses, so that the adjacent lenses have good alignment.

Another advantage of the present invention is to provide an optical lens and a method for manufacturing the same, in which the length of the entire lens follows the length of the lens barrel due to the elastic recovery of the buffer in the axial direction, thereby maintaining the generation of no gap in the case of temperature difference.

Another advantage of the present invention is to provide an optical lens and a method of manufacturing the same, which is disposed between a lens barrel and a lens while maintaining the buffer members in a relative tendency during the manufacturing process of the optical lens, so that the length of the buffer members can be normally restored to compensate for a gap that may occur during use.

Another advantage of the present invention is to provide an optical lens and a manufacturing method thereof, in which during the manufacturing process of the optical lens, pressure is provided to the buffer, so that the integrity of the lens and the spacer is ensured, and the stability of the optical lens is improved.

Another advantage of the present invention is to provide an optical lens and a method for manufacturing the same, in which the buffer member is kept under a proper pressure during the manufacturing process of the optical lens, so that elastic fatigue of the buffer member during use is prevented, and the gap compensation effect in the axial direction is prevented from being affected.

Another advantage of the present invention is to provide an optical lens and a method for manufacturing the same, in which the spacer includes at least one spacer, and the spacer and the buffer are respectively disposed between adjacent lenses, and the manufacturing of the optical lens can be completed without additional equipment.

Another advantage of the present invention is to provide an optical lens and a method for manufacturing the same, in which the buffer member has a larger elastic coefficient than the spacer, and assists in compensating for the difference in length between the lens barrel and the lens when the temperature difference varies.

Another advantage of the present invention is to provide an optical lens and a method of manufacturing the same, in which the buffer member has some supplementary effect on a gap generated in a radial direction in some cases.

Another advantage of the present invention is to provide an optical lens and a method of manufacturing the same, in which the lens barrel preferably has a certain mark to visually install the position of the entirety of the lens and the spacing medium with respect to the lens barrel during the manufacturing process of the optical lens.

Additional advantages and features of the invention will be set forth in the detailed description which follows and in part will be apparent from the description, or may be learned by practice of the invention as set forth hereinafter.

In accordance with one aspect of the present invention, the foregoing and other objects and advantages are achieved by an optical lens of the present invention, comprising:

a lens barrel;

a lens group, wherein lenses of the lens group are fixed to the lens barrel in a certain order; and

at least one spacing medium, wherein the spacing medium is assembled on a lens surface of the lens group to separate adjacent lenses of the lens group, wherein the lens group and the spacing medium form a lens group main body with respect to the lens barrel, and an axial length of the lens group main body varies along an axial length of an inside of the lens barrel.

According to an embodiment of the present invention, the lens barrel has a top end and a bottom end, wherein a predetermined distance is provided between the top end and an inner portion of the bottom end, and the lens groups are sequentially arranged from the top end to the bottom end and fixed in the inner portion of the lens barrel.

According to one embodiment of the invention, the overall axial length of all of the lenses and all of the spacing medium of the lens group follows the axial length of the interior of the lens barrel.

According to an embodiment of the present invention, the spacing medium comprises at least one spacer and at least one buffer, wherein the spacer and the buffer are disposed in the lens group in a certain ratio to form the lens group main body.

According to one embodiment of the invention, the spring constant of the buffer is greater than the spring constant of the spacer.

According to an embodiment of the present invention, the lens barrel includes a barrel body and a supporting bracket, wherein the supporting bracket tightly supports the lens group on the image side, and the supporting bracket limits the lens group inside the barrel body.

According to an embodiment of the present invention, the lens barrel includes a barrel body and a supporting bracket, wherein the supporting bracket tightly supports the lenses on the proximal side of the lens group, and the supporting bracket limits the lens group inside the barrel body.

According to an embodiment of the present invention, the fixing pressure of the supporting bracket to the lens group main body is borne by the buffer member, wherein the buffer member is disposed inside the lens barrel main body with a certain elastic recovery tendency.

According to an embodiment of the present invention, the supporting bracket includes a fixing portion, wherein the fixing portion is fixed on an outer wall of the lens barrel body.

According to an embodiment of the present invention, the lens barrel body further includes a mark, wherein the mark is provided on an outer wall of the lens barrel body, wherein the fixing portion determines a position with respect to the lens barrel body with reference to the mark.

According to one embodiment of the present invention, the supporting tray has a supporting surface, wherein the supporting surface is attached to a near-image side surface of a near-image side lens of the lens group.

According to an embodiment of the present invention, the support tray has a support surface, wherein the support surface is attached to a proximal surface of a proximal lens of the lens assembly.

According to one embodiment of the invention, the support surface of the support bracket is annular.

According to one embodiment of the invention, the buffer is an annular disc spring.

According to one embodiment of the invention, the buffer member employs at least two disc springs which are symmetrically placed.

According to one embodiment of the present invention, the buffer member is a U-shaped spring.

According to one embodiment of the invention, the buffer is a spring.

According to one embodiment of the invention, the buffer is a rubber ring.

According to another aspect of the present invention, the present invention further provides a method for manufacturing an optical lens, comprising the steps of:

a. preparing a lens barrel main body;

b. sequentially assembling a lens group main body from the end part of the lens cone main body into the lens cone main body; and

c. a supporting bracket is fixed at one end of the lens cone main body so as to tightly hold the lens group main body in the lens cone main body.

According to an embodiment of the present invention, the lens assembly body includes a lens group and at least one spacing medium, wherein the spacing medium is assembled on a lens surface of the lens group to separate adjacent lenses of the lens group, wherein the spacing medium includes at least one spacer and at least one buffer, wherein the spacer and the buffer are disposed in the lens group in a certain number ratio to form the lens assembly body.

According to an embodiment of the invention, in step b, the manufacturing method further comprises the steps of:

b1. sequentially assembling the lens group on the lens cone main body; and

b2. the spacing medium is placed between lenses of adjacent lens groups.

According to an embodiment of the invention, in step c, the manufacturing method further comprises the steps of:

c1. the supporting bracket applies certain pressure to the lens group and keeps the lens group so that the buffer part has the tendency of elastic recovery; and

c2. a fixing part of the support bracket is tightly attached to the outer wall of the lens cone body and is fixed.

c2. a fixing part of the support bracket is tightly attached to the inner wall of the lens cone body and is fixed.

Further objects and advantages of the invention will be fully apparent from the ensuing description and drawings.

These and other objects, features and advantages of the present invention will become more fully apparent from the following detailed description, the accompanying drawings and the claims.

Drawings

FIG. 1 is a prior art schematic of the present invention.

Fig. 2 is a sectional view of an optical lens according to a preferred embodiment of the present invention.

Fig. 3 is a schematic view of an optical lens according to the above preferred embodiment of the present invention.

Fig. 4 is a schematic manufacturing flow chart of the optical lens according to the above preferred embodiment of the present invention.

Fig. 5A and 5B are additional possible modes of the optical lens according to the above preferred embodiment of the present invention.

Fig. 6A to 6C are further possible modes of the optical lens according to the above preferred embodiment of the present invention.

Fig. 7 is a sectional view of an optical lens according to another preferred embodiment of the present invention.

Fig. 8 is a schematic view of an optical lens according to the above preferred embodiment of the present invention.

Fig. 9 is a schematic manufacturing flow chart of the optical lens according to the above preferred embodiment of the present invention.

Fig. 10 is a sectional view of an optical lens according to another preferred embodiment of the present invention.

Fig. 11A and 11B are schematic views illustrating a manufacturing flow of the optical lens according to the above preferred embodiment of the present invention.

Fig. 12A and 12B are schematic views illustrating a manufacturing flow of the optical lens according to the above preferred embodiment of the present invention.

Detailed Description

The following description is presented to disclose the invention so as to enable any person skilled in the art to practice the invention. The preferred embodiments in the following description are given by way of example only, and other obvious variations will occur to those skilled in the art. The basic principles of the invention, as defined in the following description, may be applied to other embodiments, variations, modifications, equivalents, and other technical solutions without departing from the spirit and scope of the invention.

It will be understood by those skilled in the art that in the present disclosure, the terms "longitudinal," "lateral," "upper," "lower," "front," "rear," "left," "right," "vertical," "horizontal," "top," "bottom," "inner," "outer," and the like are used in an orientation or positional relationship indicated in the drawings for ease of description and simplicity of description, and do not indicate or imply that the referenced devices or components must be in a particular orientation, constructed and operated in a particular orientation, and thus the above terms are not to be construed as limiting the present invention.

It is understood that the terms "a" and "an" should be interpreted as meaning that a number of one element or element is one in one embodiment, while a number of other elements is one in another embodiment, and the terms "a" and "an" should not be interpreted as limiting the number.

The present invention provides an optical lens, as shown in fig. 2 to 9, which can maintain a certain structural stability in a case where the optical lens is used in an environment where temperature changes.

The optical lens includes a lens barrel 10, a lens group 20 and at least one spacing medium 30, wherein the lens group 20 and the spacing medium 30 are assembled inside the lens barrel 10 to pass light through the lens group 20 inside the lens barrel 10. The spacing medium 30 is assembled on the lens surface of the lens group 20, and the lens group 20 is fixed to the lens barrel 10 in a certain order. The lens group 20 and the spacing medium 30 are integral with the lens barrel 10, and the lens group 20 and the spacing medium 30 are defined as a lens group main body 40 disposed in the lens barrel 10.

Specifically, the axial length of the lens group main body 40 follows the axial length of the inside of the lens barrel 10. That is, under the condition of temperature variation, the lens barrel 10 deforms irresistably in the axial direction, and the lens group main body 40 deforms along with the lens barrel 10, so that the lens group main body 40 does not have a gap with respect to the lens barrel 10. The position of the lens group 20 relative to the lens barrel 10 is relatively stabilized, so as to prevent the lens group 20 from loosening and even being damaged by collision. Based on the deformation of the lens group main body 40 tightly attached to the lens barrel 10, the lens group main body 40 is also prevented from loosening due to the fixation of the lens barrel 10, and the overall structure of the optical lens is relatively stable.

The lens group 20 is sequentially disposed within the lens barrel 10. The lens barrel 10 has two ends, a top end 101 and a bottom end 102, wherein a distance is provided between the inside of the top end 101 and the bottom end 102, as shown by L in fig. 3. Preferably, the lens barrel 10 is a cylinder, and the inner diameter of the top end 101 is smaller than that of the bottom end 102. The lens group 20 is sequentially arranged from the top end 101 to the bottom end 102 and fixed inside the lens barrel 10. After passing through the lens assembly 20, light is transmitted from the top end 101 to the bottom end 102. The lens group 20 includes at least two lenses. The lens disposed proximate to the most proximal side of the top 101, the lens disposed proximate to the most image side of the bottom 102. A lens group having certain optical performance is formed by arranging different lenses in a predetermined order in the lens barrel 10. The interior of the lens barrel 10 is continuous, so that the lens group 20 is placed inside the lens barrel 10 without interruption. That is, the lens barrel 10 is manufactured using the same material continuously.

For convenience of illustration, in the preferred embodiment, the lens group 20 includes five lenses, which are respectively defined as a first lens 201, a second lens 202, a third lens 203, a fourth lens 204, and a fifth lens 205. It will be understood by those skilled in the art that the number of lenses in the present invention is not limited, but five lenses are used as an illustration. The number of lens sets 20 may be varied to meet other usage requirements. It should be noted that the lens group 20 and the lens barrel 10 are made of different materials. That is, the expansion coefficient of the lens group 20 is different from that of the lens barrel 10. Preferably, the lens set 20 is made of glass material or resin material.

The spacing medium 30 is placed between adjacent lenses. Each of the spacing mediums 30 is adjacent to an adjacent lens. In the preferred embodiment, the number of the spacing mediums 30 is five, and the spacing mediums are respectively disposed on the object side surfaces of the first lens 201, the second lens 202, the third lens 203, the fourth lens 204, and the fifth lens 205. Specifically, the spacing medium 30 is respectively disposed between the object side surface of the fifth lens 205 and the image side surface of the fourth lens 204, between the object side surface of the fourth lens 204 and the image side surface of the third lens 203, between the object side surface of the third lens 203 and the image side surface of the second lens 202, between the object side surface of the second lens 202 and the image side surface of the first lens 201, and between the object side surface of the first lens 201 and the top end 101 of the lens barrel 10. That is, the lens group main body 40 includes the first lens 201, the second lens 202, the third lens 203, the fourth lens 204, the fifth lens 205, and five of the spacing media 30. The overall axial length of the first lens 201, the second lens 202, the third lens 203, the fourth lens 204, the fifth lens 205 and five spacing media 30 of the lens group main body 40 follows the axial length of the inside of the lens barrel 10. That is, under the condition of temperature change, the lens barrel 10 deforms irresistably in the axial direction, and the whole of the first lens 201, the second lens 202, the third lens 203, the fourth lens 204, the fifth lens 205, and five spacing media 30 of the lens group main body 40 deforms along with the lens barrel 10, so that the whole of the first lens 201, the second lens 202, the third lens 203, the fourth lens 204, the fifth lens 205, and five spacing media 30 does not have a gap relative to the lens barrel 10. The positions of the first lens 201, the second lens 202, the third lens 203, the fourth lens 204, and the fifth lens 205 of the lens group 20 relative to the lens barrel 10 are also relatively stabilized, so as to avoid the lens group 20 from loosening and being damaged by collision.

In particular, said spacing medium 30 comprises at least one spacer 31 and at least one buffer 32. That is, the spacer 31 and the buffer 32 are disposed in the lens group 20 in a certain ratio to form the lens group main body 40. Preferably, the elastic coefficient of the buffer 32 is greater than that of the spacer 31. The overall spring constant of the spacing medium 30 is configured accordingly by the proportional arrangement of the number of damping elements 32 and spacers 31. The buffer member 32 of the spacing medium 30 is elastically deformed to match the axial direction irresistible deformation of the lens barrel 10 under the temperature change. Then, in the case of temperature change, the lens barrel 10 deforms irresistably in the axial direction, and the spacing medium 30 inside the lens barrel 10 deforms, so that the length of the lens group main body 40 in the axial direction follows the deformation of the lens barrel 10 in the axial direction.

In addition, it is worth mentioning that the spacing medium 30 is disposed closely to the lens group 20, and when the expansion length of the lens group 20 cannot follow the expansion length of the lens barrel 10, the elastic deformation of the spacing medium 30 supplements the difference between the lens barrel 10 and the lens group 20. More, the number ratio of the spacers 31 to the buffers 32 in the spacing medium 30 is set according to the materials of the lens barrel 10 and the lens group 20. In the preferred embodiment, there are four spacers 31 and one buffer 32. In other words, one buffer member 32 is used for the spacing medium 30 according to the expansion of the materials of the lens barrel 10 and the lens group 20 in the preferred embodiment.

Specifically, the lens barrel 10 includes a barrel body 11 and a supporting bracket 12, and the supporting bracket 12 tightly supports the lens group 20 on the near-image side. In the preferred embodiment, the support tray 12 tightly supports the fifth lens 205. The first lens 201, the second lens 202, the third lens 203, the fourth lens 204, the fifth lens 205 and five spacing media 30 are fixed inside the lens barrel body 11, and the support bracket 12 fixes the lens group body 40 inside the lens barrel body 11. In particular, for the buffer member 32 having the elastic spacing medium 30, the fixing pressure of the supporting bracket 12 to the lens group main body 40 is borne by the buffer member 32, and the buffer member 32 may be disposed inside the lens barrel main body 11 with a certain elastic recovery.

It will be understood by those skilled in the art that the object-side lens and the image-side lens are relative, and the description of the object-side lens and the image-side lens can be simply replaced for different requirement scenarios.

The barrel body 11 includes an outer wall 111 and an inner wall 112, and the barrel body 11 is defined between the outer wall 111 and the inner wall 112. More, the supporting bracket 12 limits the first lens 201, the second lens 202, the third lens 203, the fourth lens 204, the fifth lens 205 and five spacing mediums 30 of the lens group main body 40 at the bottom end 102 to the inner side of the inner wall 112 of the lens barrel main body 11.

More specifically, the support holder 12 includes a fixing portion 121, and the fixing portion 121 is fixed to the outer wall 111 of the lens barrel body 11. Preferably, the fixing portion 121 is fixed near the bottom end 102 of the lens barrel 10. In the preferred embodiment, the fixing portion 121 surrounds the lens barrel body 11 and is closely attached to the outer wall 111 of the lens barrel body 11.

The supporting bracket 12 has a supporting surface 122, and the supporting surface 122 is attached to a near-image side surface of a near-image side lens of the lens group 20. The supporting surface 122 of the supporting bracket 12 provides a supporting surface for the lens group 20 inside the lens barrel body 11 at the bottom end 102 of the lens barrel body 11. The support surface 122 is an annular surface. That is, the supporting bracket 12 does not affect the light passing, and the peripheral edge of the lens set 20 is a fixed area.

More, the length from the top end 101 to the bottom end 102 inside the lens barrel 10 is defined as L. The overall length of the lens group main body 40 in the lens barrel is limited to approximately L by the support bracket 12. Preferably, the length of the lens group main body 40 is limited to L by the supporting bracket 12.

In the event of a temperature change in the environment in which the optical lens assembly is used, as shown in the drawings, expansion is given by a temperature increase, because of the temperature increase, the material of the barrel body 11 expands, and thus the length of the barrel body in the axial direction deforms, and the material of the lens group 20 expands, but because of the difference in the material of the barrel body and the lens group 20, the amount of expansion of the lens group 20 is generally negligible with respect to the barrel body 11. it is worth mentioning that the change in the temperature of the spacer 31 of the spacer medium 30 is relatively small, the cushion 32 of the spacer medium 30 deforms with the difference between the barrel body 11 and the lens group 20. the amount of deformation of the cushion 32 compensates for the difference in the expansion between the barrel body 11 and the lens group 20. that is, regardless of the temperature of the deformation of the barrel body 11 and the lens group 20 being consistent with the temperature change, it is preferable that the deformation of the barrel body 11 and the lens group 20 with the temperature change of the cushion 32 is not constant, and the axial deformation of the cushion 32 is not limited by the axial deformation of the barrel body 11 and the axial cushion 40, and the axial cushion 32 is not deformed, and the axial cushion 40 is not deformed when the temperature of the barrel body 11 increases.

It should be noted that, under the condition of temperature change, the position of the support holder 12 relative to the lens barrel body 11 is relatively fixed, and the support surface 122 of the support holder 12 is always tightly attached to the lens group 20 to keep the lens group 20 in the inner wall 112 of the lens barrel body 11. That is, the supporting bracket 12 does not change its position due to the deformation of the buffer member 32.

Preferably, the buffer 32 of the preferred embodiment is a disc spring with a ring shape. In another possible embodiment, the buffer 32 may also be at least two disc springs symmetrically disposed.

Preferably, the buffer 32 in the present preferred embodiment is placed between the inner surface of the top end 101 of the lens barrel body 11 and the object-near side surface of the first lens 201.

The present invention further provides a method for manufacturing an optical lens, specifically as shown in fig. 4, the method includes the steps of:

d. preparing the lens barrel body 11;

e. sequentially assembling the lens group main body 40 from the bottom end 102 of the lens barrel main body 11 into the lens barrel main body 11; and

f. the supporting bracket 12 is fixed to the bottom end 102 of the lens barrel body 11 to tightly hold the lens group main body 40 in the lens barrel body 11.

More, in step b, the manufacturing method further comprises:

b1. sequentially assembling the lens group 20 to the barrel body 11; and

b2. the spacing medium 30 is placed between adjacent lenses of the lens group 20.

It is worth mentioning that the spacing medium 30 at least comprises a buffer member 32. In the preferred embodiment, there are four spacers 31 and one buffer 32. The cushion member 32 is disposed on a proximal surface of the lens group 20. That is, the buffer 32 is assembled into the lens barrel body 11 first, and the lens group 20 and the spacer 31 are assembled into the lens barrel body 11 later.

More, in step c, the manufacturing method further comprises:

c1. the supporting surface 122 of the supporting bracket 12 exerts a certain pressure on the lens group 20 and keeps the lens group, so that the buffer member 32 has a tendency of elastic recovery; and

c2. the fixing portion 121 of the support holder 12 is fixed in close contact with the outer wall 111 of the lens barrel body 11.

It is worth mentioning that the pressure applied in step b1 is set according to the ratio of the number of the spacers 31 to the number of the buffers 32. In addition, the pressure applied in step b1 is set according to the position of the cushion member 32 relative to the lens group 20. Preferably, under the condition that the pressure applied in step b1 keeps the buffer member 32 relatively compressed, if a deformation difference occurs between the lens group 20 and the lens barrel body 11, the buffer member 32 can elastically stretch to supplement the deformation difference. More preferably, the pressure applied in step b1 compresses the bumper 32 to a state where it can recover length but does not have long term elastic fatigue. If the buffer 32 is compressed to the elastic fatigue state, it may not be compensated most effectively for the deformation difference between the lens group 20 and the barrel body 11.

In another possible embodiment, the manufacturing method preferably coats the inner wall 112 of the lens barrel 10 with a material such that the coefficient of thermal expansion of the inner wall 112 is close to the coefficient of thermal expansion of the lens group 20.

More specifically, the position of the cushion member 32 relative to the lens group 20 can be selected according to different needs, as shown in fig. 5A and 5B.

In the embodiment shown in fig. 5A, the buffer 32 is disposed between the near-image side surface of the fourth lens 204 and the near-object side surface of the fifth lens 205. And the cushion 32 is placed in common between the image-side surface of the fourth lens 204 and the object-side surface of the fifth lens 205 in cooperation with the spacer 31. That is, the number of the spacers 31 is five, and the number of the buffer 32 is one. On one hand, the requirement of the distance between the near-image side surface of the fourth lens 204 and the near-object side surface of the fifth lens 205 is met to achieve certain optical performance; on the other hand, compensation for the deformation difference is provided between the fourth lens 204 and the fifth lens 205.

In the embodiment illustrated in fig. 5B, the buffer 32 is disposed between the near-image side surface of the second lens 202 and the near-object side surface of the third lens 203. According to the requirement of the optical performance of the optical lens, a certain deformation difference compensation is provided while the distance between the second lens 202 and the third lens 203 is ensured. Therefore, the number, for example, and the positions of the spacers 31 and the buffer members 32 are set according to the requirements of optical performance.

In another possible embodiment of the optical lens system, as shown in fig. 6A to 6C, the structures of the lens barrel 10 and the lens group 20 are similar to those of the optical lens system of the above preferred embodiment, and are not repeated herein. It is worth mentioning that the buffer member 32 of the spacing medium 30 is different from the above-mentioned embodiment in that the buffer member 32 may be selected from any one of a U-shaped spring, a spring, and a rubber ring. Here, the buffer 32 is placed between the inner side of the top end 101 of the lens barrel body 11 and the object side of the lens group 20.

As shown in fig. 6A, the buffer 32 is implemented as a U-shaped spring. The two elastic arms of the buffer 32 are respectively closely attached to the inner side of the top end 101 of the lens barrel body 11 and the near side of the lens group 20. If the deformation difference occurs between the lens barrel body 11 and the lens group 20, the distance between the two elastic arms of the buffer 32 changes to compensate the deformation difference. For example, when the expansion amount between the barrel body 11 and the lens group 20 is different due to temperature rise, the distance between the two elastic arms of the buffer 32 is increased, so that the lens group 20 is still fastened inside the barrel body 11 through the buffer 32.

As shown in fig. 6B, the buffer 32 is implemented as a spring. The two elastic end portions of the cushion member 32 are respectively closely attached to the inner side of the top end 101 of the lens barrel body 11 and the near side of the lens group 20. If the deformation difference occurs between the lens barrel body 11 and the lens group 20, the distance between the two elastic ends of the buffer 32 changes to compensate the deformation difference. For example, when the expansion amount between the barrel body 11 and the lens group 20 is different due to temperature rise, the distance between the two elastic ends of the buffer 32 is increased, so that the lens group 20 is still fastened inside the barrel body 11 by the buffer 32.

As shown in fig. 6C, the buffer 32 is implemented as a rubber ring. The cushion member 32 has upper and lower surfaces respectively closely attached to the inner side of the distal end 101 of the lens barrel body 11 and the proximal side of the lens group 20. If the deformation difference occurs between the lens barrel body 11 and the lens group 20, the distance between the upper and lower surfaces of the buffer member 32 changes, that is, the thickness of the rubber ring deforms to compensate the deformation difference. For example, when the expansion amount between the barrel body 11 and the lens group 20 is different due to temperature rise, the distance between the upper and lower surfaces of the buffer 32 is increased, so that the lens group 20 is still fastened inside the barrel body 11 by the buffer 32.

An optical lens assembly of another preferred embodiment of the present invention is illustrated, as shown in fig. 7 to 9, wherein the adjustable working lamp includes a lens barrel 10A, a lens group 20A and at least one spacing medium 30A, and the structures of the lens barrel 10A and the lens group 20A are similar to the lens barrel 10 and the lens group 20 of the optical lens assembly of the first preferred embodiment, and therefore, the detailed description thereof is omitted.

The spacing medium 30A includes at least one spacer 31A and at least one buffer 32A. That is, the spacer 31A and the cushion 32A are disposed in the lens set 20A in a certain ratio to form a lens set main body 40A. Preferably, the elastic modulus of the buffer 32A is greater than that of the spacer 31A. The overall spring constant of the spacing medium 30A is configured accordingly by the number ratio of the buffer elements 32A to the spacers 31A. The buffer member 32A of the spacing medium 30A is elastically deformed to match the axial direction irresistible deformation of the lens barrel 10A under the condition of temperature change. Then, under the condition of temperature change, the lens barrel 10A deforms irresistably in the axial direction, and the spacing medium 30A inside the lens barrel 10A deforms, so that the length of the lens group main body 40A in the axial direction follows the deformation of the lens barrel 10A in the axial direction.

It should be noted that the spacing medium 30A is disposed closely to the surface of the lens group 20A, and when the expansion length of the lens group 20A cannot follow the expansion length of the lens barrel 10A, the elastic deformation of the spacing medium 30A compensates the difference between the lens barrel 10A and the lens group 20A. More specifically, the number ratio of the spacers 31A to the cushioning members 32A in the spacing medium 30A is set according to the material of the lens barrel 10A and the lens group 20A. In the preferred embodiment, there are four spacers 31A and one buffer 32A. In other words, one buffer member 32A is used for the spacing medium 30A according to the expansion of the materials of the lens barrel 10A and the lens group 20A according to the preferred embodiment.

For the purpose of illustrating the features of the preferred embodiment, the spacing medium 30A is selected from a buffer 32A disposed inside the top end 101A of the lens barrel body 11A and an object-near side of the lens group 20A as an example, which is not limited to the buffer 32A.

In the preferred embodiment, the buffering member 32A is an elastic sleeve attached to the upper and lower edges of the first lens 201A. The cushion 32A is preferably annular to completely cover the edge of the first lens 201A. In another embodiment, the bumpers 32A are at least two arc-shaped sleeves, and the bumpers 32A are symmetrically attached to the periphery of the first lens 201A. It is worth mentioning that the buffer 32A has a tendency to be elastically restored in both the axial direction and the radial direction. That is, the buffer member 32A provides complementary action in the axial direction and the radial direction inside the lens barrel body 11A.

In the embodiment shown in fig. 8, the expansion of the lens barrel body 11A due to temperature rise is exemplified, the length of the lens barrel body 11A is deformed in the axial direction due to temperature rise, but the expansion of the lens group 20A is also different due to different materials of the lens barrel body 20A, generally, the expansion of the lens group 20A is negligible with respect to the lens barrel body 11A, similar to the above embodiment, the change of the spacer 31A of the spacing medium 30A due to temperature is relatively small, the deformation of the spacer 32A of the spacing medium 30A is caused based on the difference △ 2 between the lens barrel body 11A and the lens group 20A, the deformation of the spacer 32A compensates the expansion difference between the lens barrel body 11A and the lens group 20A, that is to compensate for the expansion difference between the lens barrel body 11A and the lens group 20A, that is to the deformation of the lens barrel body 32A and the lens group 20A due to temperature rise, that is caused by the deformation of the lens barrel body 11A and the lens group 20A due to temperature rise, the deformation of the lens barrel body 32A and the axial buffer 32A is preferably caused by the axial expansion of the buffer 32A near side of the lens barrel body 32A, the axial buffer 32A is caused by the axial buffer 32A, the axial buffer 32A and the axial buffer 32b, the axial buffer 32b is caused by the axial buffer 32b, and the axial buffer 32b may be caused by the axial buffer 32b, and the axial buffer 32b, and the axial buffer 32b, the axial buffer 32b may be caused by the axial buffer 32b, the axial buffer 32b may be increased.

In addition, if the lens barrel body 11A expands in the radial direction due to a temperature change, the buffer member 32A returns to its length in the radial direction to compensate for a radial difference between the lens barrel body 11A and the first lens 201A. It should be noted that the first lens 201A can provide pressure to the second lens 202A, the third lens 203A, the fourth lens 204A and the fifth lens 205A through the buffer 32A, so that no additional axial gap is generated between the lens group 20A and the barrel body 11A when the temperature of the optical lens changes. Moreover, the supplement in the radial direction to which the first lens 201A is subjected also relatively fixes the position of the first lens 201A, the relative stabilization of the first lens 201A will assist the second lens 202A, the third lens 203A, the fourth lens 204A and the fifth lens 205A to also remain stable. The entire lens assembly 20A is prevented from being displaced or collided with by looseness.

The barrel body 11A of the optical lens of the present preferred embodiment further includes a mark 50A. The mark 50A is provided on the outer wall 111A of the barrel body 11A. In the manufacturing and assembling of the optical lens, the position of the fixing portion 121A relative to the lens barrel body 11A is designated for the support holder 12A. In other words, when the temperature changes, the position of the supporting holder 12A relative to the mark 50A of the barrel body 11A is relatively determined, and the supporting surface 122A of the supporting holder 12A is always in close contact with the lens group 20A to hold the lens group 20A in the inner wall 112A of the barrel body 11A. That is, the supporting bracket 12A does not change its position due to the deformation of the buffer member 32A.

More, the manufacturing method of the optical lens in the preferred embodiment is as shown in fig. 9. The manufacturing method includes the steps of:

i. inverting the barrel body 11A;

affixing said bumper 32A to the periphery of said first lens 201A;

assembling the lens group 20A and the spacing medium 30A into the lens barrel body 11A sequentially from the bottom end 102A of the lens barrel body 11A to form the lens group body 40A; and

fixing the supporting bracket 12A to the bottom end 102A of the lens barrel body 11A with reference to the mark 50A to tightly hold the lens group body 40A in the lens barrel body 11A.

Further, in step iii, the manufacturing method further includes:

iii1. the first lens 201A is assembled into the barrel body 11A in a state where the cushion member 32A has a tendency of elastic recovery in the radial direction.

Further, in step iii, the manufacturing method further includes:

the supporting surface 122A of the supporting holder 12A exerts a certain pressure on the lens group 20A and holds the lens group, so that the buffer 32A has a tendency of elastic recovery; and

iii3. the fixing portion 121A of the support holder 12A is fixed with reference to the mark 50A being in close contact with the outer wall 111A of the barrel body 11A.

More, the pressure applied in step iii2 is set according to the number ratio of the spacers 31A to the buffers 32A. In addition, the pressure applied in step iii2 is set according to the position of the cushion member 32A relative to the lens group 20A. Preferably, under the condition that the pressure applied in step iii2 keeps the buffer member 32A relatively compressed, if a deformation difference occurs between the lens group 20A and the lens barrel body 11A, the buffer member 32A can elastically stretch to supplement the deformation difference. More preferably, the pressure applied in step iii2 compresses the bumper 32A to a state that allows for recovery of length but without long term elastic fatigue. If the buffer 32A is compressed to the elastic fatigue state, it may not be compensated most effectively for the difference in deformation between the lens group 20A and the barrel body 11A.

It should be noted that, in the case where the number ratio of the spacers 31A to the cushion members 32A, the position of the cushion members 32A relative to the lens group 20A, and other conditions are consistent, the position of the mark 50A relative to the lens barrel body 11A is also relatively determined. Then, the extent of the support holder 12A to the index 50A is determined, which provides convenience in mass production of the optical lens.

An optical lens of another preferred embodiment of the present invention is illustrated, as shown in fig. 10 to 12B, wherein the adjustable working lamp includes a lens barrel 10B, a lens group 20B and at least one spacing medium 30B, and the structures of the lens barrel 10B and the lens group 20B are similar to the lens barrel 10 and the lens group 20 of the optical lens of the first preferred embodiment, and therefore, the detailed description thereof is omitted.

The spacing medium 30B includes at least one spacer 31B and at least one buffer 32B. That is, the spacer 31B and the cushion 32B are disposed in the lens set 20B in a certain ratio to form a lens set main body 40B. Preferably, the elastic coefficient of the buffer 32B is larger than that of the spacer 31B. The spring constant of the overall spacing medium 30B is configured accordingly by the proportional arrangement of the number of the damping elements 32B and the spacers 31B. The buffer member 32B of the spacing medium 30B is elastically deformed to match the axial direction irresistible deformation of the lens barrel 10B under the condition of temperature change. Then, under the condition of temperature change, the lens barrel 10B deforms irresistably in the axial direction, and the spacing medium 30B inside the lens barrel 10B deforms, so that the length of the lens group main body 40B in the axial direction follows the deformation of the lens barrel 10B in the axial direction.

It is worth mentioning that the lens barrel 10B further includes a pressing member 13B. The pressing member 13B tightly supports the lens on the image side of the lens group 20B. The pressing member 13B is fixed to the inner side of the tip 101B, and stably restricts the lens group main body 40B to the inside of the lens barrel 10B. In addition, the pressing member 13B is fixed to the inner wall of the lens barrel body 11B corresponding to the support holder 12B. More, the barrel body 11B further includes a boss 113B, and the boss 113B protrudes from the inner wall 112B to the inside of the barrel body 11B to separate two lenses.

It should be noted that the optical lens of the preferred embodiment can be assembled with the lens group main body 40B sequentially from the top end 101B and the bottom end 102B. The assembly process from the top end 101B and then the bottom end 102B is illustrated in fig. 12A-12B. The assembly process from the bottom end 102B and then from the top end 101B is illustrated in fig. 11A-11B.

Specifically, the manufacturing method includes the steps of:

a. preparing the lens barrel body 11B;

b. assembling the lens group main body 40B into the lens barrel main body 11B from one end of the lens barrel main body 11B in sequence; and

c. the supporting bracket 12B is fixed to the bottom end 102B of the lens barrel body 11B, and the pressing member 13B is fixed to the top end 101B, so as to tightly hold the lens group body 40B in the lens barrel body 11B.

More, in step b, the manufacturing method further comprises:

b1. sequentially assembling the lens group 20B to the barrel body 11B; and

b2. in the lens group 20B on both sides of the boss 113B, the spacing medium 30B is disposed between adjacent lenses.

More, in step c, the manufacturing method further comprises:

c1. the supporting surface 122B of the supporting base 12B applies a certain pressure to and holds the lens group 20B; and

c2. the pressing member 13B applies a certain pressure to and holds the lens group 20B.

That is, both sides of the boss 113B can hold the entire length of the mirror group main body 40B by the buffer 32B.

It will be appreciated by persons skilled in the art that the embodiments of the invention described above and shown in the drawings are given by way of example only and are not limiting of the invention. The objects of the invention have been fully and effectively accomplished. The functional and structural principles of the present invention have been shown and described in the examples, and any variations or modifications of the embodiments of the present invention may be made without departing from the principles.

Claims

1. An optical lens, comprising:

a lens barrel;

2. The optical lens assembly as claimed in claim 1, wherein the lens barrel has a top end and a bottom end, wherein a predetermined distance is provided between the top end and an inner portion of the bottom end, and wherein the lens groups are sequentially arranged from the top end to the bottom end to be fixed in the inner portion of the lens barrel.

3. The optical lens of claim 2 wherein an overall axial length of all of the lenses and all of the spacing media of the lens group follows an axial length of the lens barrel interior.

4. The optical lens of claim 2 wherein the spacing medium comprises at least one spacer and at least one buffer, wherein the spacer and the buffer are disposed in the lens group in a ratio to form the lens group body.

5. An optical lens according to claim 4, wherein the buffer member has a coefficient of elasticity greater than that of the spacer.

6. The optical lens assembly as claimed in claim 4, wherein the lens barrel includes a barrel body and a support bracket, wherein the support bracket tightly supports the lens group on the image side, and wherein the support bracket limits the lens group inside the barrel body.

7. The optical lens assembly as claimed in claim 4, wherein the lens barrel includes a barrel body and a support bracket, wherein the support bracket tightly supports the lenses on the proximal side of the lens group, and wherein the support bracket limits the lens group inside the barrel body.

8. The optical lens assembly according to claim 6 or 7, wherein the fixing pressure of the supporting bracket to the lens group main body is borne by the buffer member, wherein the buffer member is disposed inside the lens barrel main body with a certain elastic recovery tendency.

9. The optical lens barrel according to claim 6 or 7, wherein the support bracket includes a fixing portion, wherein the fixing portion is fixed to an outer wall of the barrel body.

10. The optical lens barrel according to claim 6 or 7, wherein the barrel body further includes a mark, wherein the mark is provided on an outer wall of the barrel body, wherein the fixing portion determines a position with respect to the barrel body with reference to the mark.

11. The optical lens assembly as claimed in claim 6 or 7, wherein the supporting bracket has a supporting surface, wherein the supporting surface is attached to a near-image side surface of a near-image side lens of the lens group.

12. The optical lens assembly as claimed in claim 6 or 7, wherein the supporting bracket has a supporting surface, wherein the supporting surface is attached to a proximal surface of a proximal lens of the lens group.

13. An optical lens according to claim 11, wherein the support surface of the support bracket is annular.

14. An optical lens according to claim 12, wherein the support surface of the support bracket is annular.

15. An optical lens according to any one of claims 5 to 7, wherein the buffer member employs a disc spring having a ring shape.

16. An optical lens according to any one of claims 5 to 7, wherein the buffer employs at least two disc springs placed symmetrically.

17. An optical lens according to any one of claims 5 to 7, wherein the buffer member is a U-shaped spring.

18. An optical lens according to any one of claims 5 to 7, wherein the buffer employs a spring.

19. An optical lens according to any one of claims 5 to 7, wherein the buffer member employs a rubber ring.

20. A method of manufacturing an optical lens, comprising the steps of:

a. preparing a lens barrel main body;

21. The method of claim 20, wherein the lens assembly body comprises a lens group and at least one spacing medium, wherein the spacing medium is assembled to a lens surface of the lens group to separate adjacent lenses of the lens group, wherein the spacing medium comprises at least one spacer and at least one buffer, wherein the spacer and the buffer are disposed in the lens group in a quantitative ratio to form the lens assembly body.

22. The manufacturing method according to claim 21, wherein in step b, the manufacturing method further comprises the steps of:

b1. sequentially assembling the lens group on the lens cone main body; and

b2. the spacing medium is placed between lenses of adjacent lens groups.

23. The manufacturing method according to claim 21, wherein in step c, the manufacturing method further comprises the steps of:

24. The manufacturing method according to claim 21, wherein in step c, the manufacturing method further comprises the steps of: