CN213069317U

CN213069317U - High zoom ratio zoom lens

Info

Publication number: CN213069317U
Application number: CN202021520524.0U
Authority: CN
Inventors: 王兰
Original assignee: Zhejiang Huazhou Intelligent Equipment Co ltd
Current assignee: Zhejiang Huazhou Intelligent Equipment Co ltd
Priority date: 2020-07-28
Filing date: 2020-07-28
Publication date: 2021-04-27
Anticipated expiration: 2030-07-28

Abstract

The utility model discloses a high zoom ratio zoom lens in succession, among the optical system of camera lens, be equipped with meniscus positive lens, the first cemented mirror that comprises first biconvex positive lens and first biconcave negative lens, the second cemented mirror that comprises second biconcave negative lens two and second biconvex positive lens along light incidence direction from left to right in proper order, and third biconvex positive lens; the air space between the meniscus positive lens and the first biconvex positive lens is 0.1mm to 1mm, the air space between the first biconcave negative lens and the second biconcave negative lens is 3mm to 4mm, and the air space between the second biconvex positive lens and the third biconvex positive lens is 0.1mm to 1 mm. The utility model discloses a high zoom ratio camera lens in succession can realize the zoom up to 30 times, and has characteristics such as low distortion, high resolution, small, with low costs.

Description

High zoom ratio zoom lens

Technical Field

The utility model relates to an optical lens technical field, concretely relates to high zoom ratio camera lens in succession.

Background

The zoom lens is an optical lens whose magnification can be adjusted continuously within a certain range, and generally has the characteristics of high resolution, high contrast and the like at each magnification, and a user can select the zoom lens within a corresponding magnification range for use according to the size of an object to be tested or photographed. At present, a commonly used optical lens with a high zoom ratio is large in size, the zoom ratio is between 2 times and 20 times, and a large adjustment of a working distance (focusing range) is required.

SUMMERY OF THE UTILITY MODEL

The to-be-solved technical problem of the utility model is to provide a high zoom ratio camera lens, this high zoom ratio continuous zoom lens only need adjust working distance and change at 29mm to 316 mm's scope, can realize that the zoom ratio reaches 30 times, and have characteristics such as low distortion, high resolution, small, with low costs.

In order to solve the technical problem, the utility model provides a following technical scheme:

the utility model provides a high zoom ratio lens in succession, among the optical system of camera lens, be equipped with meniscus positive lens, the first cemented lens that comprises first biconvex positive lens and first biconcave negative lens, the second cemented lens that comprises second biconcave negative lens two and second biconvex positive lens along light from left right side incident direction in proper order, and third biconvex positive lens;

the air space between the meniscus positive lens and the first biconvex positive lens is 0.1mm to 1mm, the air space between the first biconcave negative lens and the second biconcave negative lens is 3mm to 4mm, and the air space between the second biconvex positive lens and the third biconvex positive lens is 0.1mm to 1 mm.

Further, the mechanical structure of the lens comprises an inner lens barrel, a main lens barrel, a curve barrel, a focusing ring and a C interface, wherein the inner lens barrel is positioned in the main lens barrel, and the meniscus positive lens, the first cemented lens, the second cemented lens and the third biconvex positive lens are all arranged in the inner lens barrel;

positive lens of falcate and first biconvex positive lens separate through first space ring, and the positive lens of second biconvex separates through the second space ring with the positive lens of third biconvex, the left end of positive lens of falcate compresses tightly through first clamping ring, the right-hand member of the positive lens of third biconvex compresses tightly through the second clamping ring.

Furthermore, the curve barrel is sleeved on the main lens barrel, the focusing barrel is sleeved on the curve barrel, and the curve barrel and the focusing barrel are fixed together through screws; the main lens cone is provided with a linear groove extending along the axis direction of the main lens cone, and the curve cylinder is provided with a spiral curve groove; a guide nail is fixed on the inner lens cone, and the head of the guide nail sequentially penetrates through the linear groove and the curve groove; the focusing ring is sleeved on the exposed end part of the main lens cone, and a thread is arranged on the contact surface of the focusing ring and the main lens cone to be screwed on the main lens cone; the C interface is installed on the focusing ring.

Further, the curve barrel and the focusing barrel are fixed together through a first flat head screw.

Furthermore, the curve barrel and the focusing barrel are provided with first fastening screws for locking the curve barrel and the focusing barrel on the main lens barrel together.

Furthermore, a second fastening screw is arranged on the focusing ring and used for locking the focusing ring on the main lens barrel.

Furthermore, an annular groove is formed in the peripheral surface of the focusing ring, a second flat head screw is arranged on the joint C, and the end part of the second flat head screw extends into the annular groove; the width of the annular groove is larger than the diameter of the end part of the second flat head screw.

Furthermore, the inner wall of the main lens cone, the first spacing ring, the second spacing ring, the first pressing ring and the second pressing ring are provided with extinction lines and/or are coated with extinction paint.

Compared with the prior art, the beneficial effects of the utility model reside in that:

1. the utility model discloses a high zoom ratio zoom lens in succession only needs to adjust working distance and changes at 29mm to 316 mm's scope, can realize that the zoom ratio reaches 30 times, and in addition, this camera lens still has characteristics such as low distortion, high resolution, small, with low costs.

2. The utility model discloses a high zoom ratio zoom lens in succession can be used to the test circuit board, arrives the solder joint for a short time, arrives the location measurement of mark point all around greatly.

Drawings

Fig. 1 is a schematic cross-sectional view of a high zoom ratio zoom lens of the present invention;

FIG. 2 is a schematic diagram of the lens optical system of FIG. 1;

FIG. 3 is an exploded schematic view of the lens of FIG. 1;

the reference numbers in the figures illustrate: 1. an inner barrel; 1-1, a straight line groove; 2. a main barrel; 3. a curved tube; 3-1, a curved groove; 4. a focusing barrel; 5. a focusing ring; 5-1, a threaded part; 6. interface C; 7-1, a first space ring; 7-2, a second space ring; 8-1, a first pressure ring; 8-2, a second pressure ring; 9-1, a first set screw; 9-2, a second set screw; 10. guiding the nail; 11-1, a first flat head screw; 11-2, a second flat head screw;

A. a meniscus positive lens; B. a first biconvex positive lens; C. a first biconcave negative lens; D. a second biconcave negative lens; E. a second biconvex positive lens; F. a third biconvex positive lens.

Detailed Description

The present invention is further described with reference to the following drawings and specific embodiments so that those skilled in the art can better understand the present invention and can implement the present invention, but the embodiments are not to be construed as limiting the present invention.

Unless defined otherwise, all technical and scientific terms used herein have the same meaning as commonly understood by one of ordinary skill in the art to which this invention belongs. The terminology used in the description of the invention herein is for the purpose of describing particular embodiments only and is not intended to be limiting of the invention. As used herein, the term "and/or" includes any and all combinations of one or more of the associated listed items.

The experimental methods used in the following examples are conventional methods unless otherwise specified, and materials, reagents and the like used therein are commercially available without otherwise specified.

As described in the background art, a high zoom ratio optical lens commonly used at present is large in size, the zoom ratio is between 2 times and 20 times, and a large adjustment of a working distance (focusing range) is required.

In order to solve the problem, the utility model provides a high zoom ratio lens. Referring to fig. 2, in the optical system of the lens barrel, a positive meniscus lens a, a first cemented lens composed of a first biconvex positive lens B and a first biconcave negative lens C, a second cemented lens composed of a second biconcave negative lens D and a second biconvex positive lens E, and a third biconvex positive lens F are sequentially disposed along the incident direction of light from left to right. The air space between the meniscus positive lens A and the first biconvex positive lens B is 0.1-1 mm, the air space between the first biconcave negative lens C and the second biconcave negative lens D is 3-4 mm, and the air space between the second biconvex positive lens E and the third biconvex positive lens F is 0.1-1 mm.

The positive meniscus lens A, the first cemented lens, the second cemented lens and the third biconvex positive lens F are all installed in the inner lens barrel 1, wherein the positive meniscus lens A and the first biconvex positive lens B are separated by a first space ring 7-1, the second biconvex positive lens E and the third biconvex positive lens F are separated by a second space ring 7-2, the left end of the positive meniscus lens A is pressed by a first pressing ring 8-1, and the right end of the third biconvex positive lens F is pressed by a second pressing ring 8-2.

Referring to fig. 1-3, the mechanical structure of the lens includes an inner barrel 1, a main barrel 2, a curve barrel 3, a focusing barrel 4, a focusing ring and a C interface 6, wherein the inner barrel 1 is located in the main barrel 2, the curve barrel 3 is sleeved on the main barrel 2, the focusing barrel 4 is sleeved on the curve barrel 3, and the curve barrel 3 and the focusing barrel 4 are fixed together by screws. In this embodiment, the cam cylinder 3 and the focus cylinder 4 are fixed together by a first flat head screw 11-1 so as to be rotatable together.

Referring to fig. 3, the main barrel 2 is provided with a linear groove 1-1 extending along the axial direction thereof, and the curved barrel 3 is provided with a spiral curved groove 3-1. A guide nail 10 is fixed on the inner lens cone 1, and the head of the guide nail 10 sequentially passes through the linear groove 1-1 and the curved groove 3-1. Therefore, when the focusing barrel 4 is rotated, the guide pin 10 moves along the curve groove 3-1, and further drives the inner lens barrel 1 to move, so as to realize coarse adjustment of magnification. Preferably, the curve cylinder 3 and the focusing cylinder 4 are provided with first fastening screws 9-1, so that after coarse adjustment is finished, the curve cylinder 3 and the focusing cylinder 4 can be locked on the main lens barrel 2 together by tightening the first fastening screws 9-1.

The focusing ring is sleeved on the exposed end part of the main lens barrel 2, and the contact surfaces of the focusing ring and the main lens barrel 2 are provided with threads for mutual screwing. When the focusing ring is rotated, the main lens barrel 2 and the focusing ring can move relatively, so that the working distance is changed, and fine adjustment of magnification is realized. Preferably, the focusing ring is provided with a second set screw 9-2, so that after fine adjustment is completed, the focusing ring can be locked on the main lens barrel 2 by tightening the second set screw 9-2.

The C interface 6 is arranged on the focusing ring, and the right end of the C interface 6 is used for installing a camera of the C interface 6. An annular groove is arranged on the outer peripheral surface of the focusing ring, a second flat head screw 11-2 is arranged on the C interface 6, and the end part of the second flat head screw extends into the annular groove. The width of the annular groove is larger than the diameter of the end part of the second flat head screw 11-2, so that the existence of the annular groove limits the moving stroke of the focusing ring.

Preferably, the inner wall of the main lens barrel 2, the first space ring 7-1, the second space ring 7-2, the first press ring 8-1 and the second press ring 8-2 are provided with extinction lines and/or coated with extinction paint, so that the influence of stray light on imaging can be reduced to the greatest extent.

The utility model discloses a zoom lens, its magnification is 0.1 times to 3 times, and relative numerical aperture is F6-F21, and the biggest 2/3 "target surface sensor that matches, the biggest optical caliber is less than 10mm, and optics total length is first lens and is 43mm to the distance on image plane, and the field of vision scope is 3mm-88mm, and operating band is 400nm-700nm, and the working distance variation range is 29mm-316mm, and full field of vision within range distortion is less than 0.1%, and the focus is between 30-35.

The above-mentioned embodiments are merely preferred embodiments for fully illustrating the present invention, and the scope of the present invention is not limited thereto. Equivalent substitutes or changes made by the technical personnel in the technical field on the basis of the utility model are all within the protection scope of the utility model. The protection scope of the present invention is subject to the claims.

Claims

1. A high zoom ratio zoom lens in succession, characterized by that, in the optical system of the said lens, there are positive lens of meniscus, the first cemented lens formed by first biconvex positive lens and first biconcave negative lens, the second cemented lens formed by second biconcave negative lens and second biconvex positive lens, and the third biconvex positive lens sequentially along the incident direction of light from left to right;

the air space between the meniscus positive lens and the first biconvex positive lens is 0.1 mm-1 mm, the air space between the first biconcave negative lens and the second biconcave negative lens is 3 mm-4 mm, and the air space between the second biconvex positive lens and the third biconvex positive lens is 0.1 mm-1 mm.

2. A high zoom ratio zoom lens as claimed in claim 1, wherein the mechanical structure of the lens comprises an inner barrel, a main barrel, a curve barrel, a focusing ring and a C-interface, the inner barrel is located in the main barrel, and the positive meniscus lens, the first cemented lens, the second cemented lens and the third biconvex positive lens are all mounted in the inner barrel;

3. A high zoom ratio zoom lens system as claimed in claim 2, wherein the curved barrel is fitted over the main barrel, the focusing barrel is fitted over the curved barrel, and the curved barrel and the focusing barrel are fixed together by screws; the main lens cone is provided with a linear groove extending along the axis direction of the main lens cone, and the curve cylinder is provided with a spiral curve groove; a guide nail is fixed on the inner lens cone, and the head of the guide nail sequentially penetrates through the linear groove and the curve groove; the focusing ring is sleeved on the exposed end part of the main lens cone, and a thread is arranged on the contact surface of the focusing ring and the main lens cone to be screwed on the main lens cone; the C interface is installed on the focusing ring.

4. A high zoom ratio zoom lens system as recited in claim 3, wherein said curve barrel and said focus barrel are fixed together by a first flat screw.

5. A high zoom ratio zoom lens assembly as recited in claim 3, wherein the curve barrel and the focus barrel are provided with first fastening screws for locking the curve barrel and the focus barrel together to the main barrel.

6. A high zoom ratio zoom lens system as recited in claim 3, wherein the focus ring has a second set screw for locking the focus ring to the main barrel.

7. A high zoom ratio zoom lens system as recited in claim 3, wherein an annular groove is formed on an outer peripheral surface of said focus ring, and a second flat head screw is provided on said C-port, an end portion of which extends into said annular groove; the width of the annular groove is larger than the diameter of the end part of the second flat head screw.

8. A high zoom ratio zoom lens according to claim 3, wherein the inner wall of the main barrel, the first spacer, the second spacer, the first compression ring and the second compression ring are provided with extinction marks and/or are coated with extinction paint.