CN210270355U

CN210270355U - Zoom monitoring lens

Info

Publication number: CN210270355U
Application number: CN201921058111.2U
Authority: CN
Inventors: 黄晓光; 黄雷; 张许娜; 陈胜利; 刘维娜; 杨方元; 李智超
Original assignee: LIDA PHOTOELECTRICAL CO Ltd NANYANG
Current assignee: LIDA PHOTOELECTRICAL CO Ltd NANYANG
Priority date: 2018-12-14
Filing date: 2019-07-09
Publication date: 2020-04-07
Anticipated expiration: 2029-07-09
Also published as: CN110456492A

Abstract

The utility model discloses a zoom monitoring lens, which comprises four parts of a zoom group, a diaphragm, a compensation group and a rear fixing group from an object space to an image space in sequence, the zoom group consists of a first lens with negative focal power, a second lens with negative focal power and a third lens with positive focal power, the compensation group consists of a fourth lens with positive focal power, a fifth lens with positive focal power, a sixth lens with negative focal power, a seventh lens with positive focal power, an eighth lens with positive focal power, a ninth lens with negative focal power, a tenth lens with positive focal power and an eleventh lens with positive focal power, the fifth lens with positive focal power and the sixth lens group with negative focal power become a first cemented lens with negative focal power, the eighth lens with positive focal power and the ninth lens group with negative focal power become a second cemented lens with negative focal power, the fixed group is composed of a twelfth lens with negative focal power and a thirteenth lens with positive focal power. The utility model discloses zoom monitoring camera can realize zooming of 4-16mm focus, and resolution ratio is high, confocal, stable good, compact structure day night, is fit for being arranged in 24 hours monitored control systems in various places.

Description

Zoom monitoring lens

Technical Field

The utility model relates to an optical imaging equipment technical field specifically is a zoom monitoring camera.

Background

If a monitoring lens is used for monitoring a large-range target place, a relatively large field angle, namely a wide-angle lens, is required; if a small range of target details is to be resolved, a relatively long focal length, i.e. a telephoto lens, is required. For a fixed-focus lens, the wide angle and the telephoto are contradictory to each other and cannot be realized simultaneously. The zoom monitoring lens integrates a wide angle and a long focus, realizes large-range target monitoring by using a short focus end, and realizes small-range detail identification by using a long focus end. And the confocal imaging of the visible light wave band and the near infrared light wave band also solves the problem that the monitoring picture of the monitoring lens is unclear at night.

SUMMERY OF THE UTILITY MODEL

The utility model aims to overcome the not enough of prior art, provide a confocal high definition of excellent performance, day night and zoom monitoring camera.

In order to achieve the above design purpose, the utility model adopts the following technical scheme: a zoom monitoring lens comprises a zoom group, a diaphragm, a compensation group and a rear fixed group in sequence from an object side to an image side, wherein the zoom group comprises a first lens with negative focal power, a second lens with negative focal power and a third lens with positive focal power, the compensation group comprises a fourth lens with positive focal power, a fifth lens with positive focal power, a sixth lens with negative focal power, a seventh lens with positive focal power, an eighth lens with positive focal power, a ninth lens with negative focal power, a tenth lens with positive focal power and an eleventh lens with positive focal power, the fifth lens with positive focal power and the sixth lens with negative focal power form a first cemented lens with negative focal power, the eighth lens with positive focal power and the ninth lens with negative focal power form a second cemented lens with negative focal power, and the fixed group comprises a twelfth lens with negative focal power and a thirteenth lens with positive focal power, the twelfth lens with negative focal power and the thirteenth lens group with positive focal power become a third cemented lens with positive focal power, and the first lens with negative focal power is a meniscus lens with negative focal power and convex to the object; the second lens with negative focal power is a biconcave lens with negative focal power; the third lens with positive focal power is a meniscus lens with positive focal power and convex to the object; the fourth lens with positive focal power is a biconvex lens with positive focal power; the fifth lens with positive focal power is a biconvex lens with positive focal power, and the sixth lens with negative focal power is a biconcave lens with negative focal power; the seventh lens with positive focal power is a biconvex lens with positive focal power; the eighth lens with positive focal power is a biconvex lens with positive focal power; the ninth lens with negative focal power is a biconcave lens with negative focal power; the tenth lens with positive focal power is a meniscus lens with positive focal power and convex towards the image; the eleventh lens with positive focal power is a biconvex lens with positive focal power; the twelfth lens with negative focal power is a biconcave lens with negative focal power; the thirteenth lens with positive focal power is a biconvex lens with positive focal power.

And a diaphragm is arranged between the zooming group and the compensation group.

The first lens to the thirteenth lens are all spherical lenses.

In the process that the focal length of the zoom lens is changed from 4mm to 16mm, the change range of the distance between the zoom lens group and the compensation group is 53.52-3.84 mm, and the change range of the distance between the compensation group and the rear fixed group is 1.39-15.59 mm. The utility model discloses beneficial effect: according to the zoom monitoring lens designed according to the scheme, an optical system formed by the first lens L1 with negative focal power and the thirteenth lens L13 with positive focal power achieves the following technical indexes: 4-time focal length conversion of the focal length f' from 4mm to 16mm is realized; confocal imaging of a visible light wave band and a near infrared wave band is realized; the conversion of the lens field of view from 136 to 34 is realized. The utility model discloses zoom monitoring camera can realize zooming of 4-16mm focus, and resolution ratio is high, confocal, stable good, compact structure day night, is fit for being arranged in 24 hours monitored control systems in various places.

Drawings

Fig. 1 is a schematic diagram of an optical structure at a wide-angle end according to an embodiment of the present invention;

FIG. 2 is a schematic diagram of a tele-end optical configuration according to an embodiment of the present invention;

fig. 3 is a schematic view of an assembly structure according to an embodiment of the present invention.

Detailed Description

The following detailed description of the embodiments of the present invention will be made with reference to the accompanying drawings. As shown in fig. 1-3: a zoom monitoring lens comprises a variable power group A01, a diaphragm STOP, a compensation group A02 and a rear fixed group A03 in sequence from an object side to an image side, wherein the variable power group A01 comprises a first lens L1 with negative focal power, a second lens L2 with negative focal power and a third lens L3 with positive focal power, the compensation group A02 comprises a fourth lens L4 with positive focal power, a fifth lens L5 with positive focal power, a sixth lens L6 with negative focal power, a seventh lens L7 with positive focal power, an eighth lens L8 with positive focal power, a ninth lens L9 with negative focal power, a tenth lens L10 with positive focal power and an eleventh lens L11 with positive focal power, the fifth lens L5 with positive focal power and the sixth lens L6 with negative focal power form a first lens L01 with negative focal power, and the ninth lens L02 with positive focal power are cemented negative focal power, the fixed group A03 consists of a twelfth lens L12 with negative focal power and a thirteenth lens L13 with positive focal power, the twelfth lens L12 with negative focal power and the thirteenth lens L13 with positive focal power form a third cemented lens A03 with positive focal power, and the first lens L1 with negative focal power is a meniscus lens with negative focal power and convex to the object; the second lens L2 with negative focal power is a biconcave lens with negative focal power; the third lens L3 with positive focal power is a meniscus lens with positive focal power and convex to the object; the fourth lens L4 with positive focal power is a biconvex lens with positive focal power; the fifth lens L5 with positive focal power is a biconvex lens with positive focal power, and the sixth lens L6 with negative focal power is a biconcave lens with negative focal power; the seventh lens L7 with positive focal power is a biconvex lens with positive focal power; the eighth lens L8 with positive focal power is a biconvex lens with positive focal power; the ninth lens L9 with negative focal power is a biconcave lens with negative focal power; the tenth lens L10 with positive focal power is a meniscus lens with positive focal power and convex direction towards the image side; the eleventh lens L11 of positive optical power is a biconvex lens having positive optical power; the twelfth lens L12 with negative power is a biconcave lens with negative power; the thirteenth lens L13 of positive power is a double convex lens having positive power.

The lens parameters are as follows:

and a diaphragm STOP is arranged between the variable magnification group A01 and the compensation group A02.

The first lens L1 to the thirteenth lens L13 are all spherical lenses.

In the process that the focal length of the zoom lens is changed from 4mm to 16mm, the change range of the distance between the zoom group A01 and the compensation group A02 is 53.52-3.84 mm, and the change range of the distance between the compensation group A02 and the rear fixed group A03 is 1.39-15.59 mm.

The embodiment of the present invention will be further explained with reference to fig. 3:

the first lens L1 with negative focal power, the second lens L2 with negative focal power and the third lens L3 with positive focal power of the variable power group A01 are assembled into the first lens barrel S11 through a first spacing ring S12 and a first pressing ring S10. The barrel one S11 is connected to the main barrel S1 through the focus ring one S2.

The fourth lens L4 with positive focal power, the first cemented lens B01, the seventh lens L7 with positive focal power, the second cemented lens B02, the tenth lens L10 with positive focal power and the eleventh lens L11 with positive focal power of the compensation group A02 are assembled into the second lens barrel S14 through a second clamping ring S13, a second spacing ring S15, a third spacing ring S16, a fourth spacing ring S17 and a fifth spacing ring S18, the second lens barrel S14 is connected with the main lens barrel S1 through a second focusing ring S3 and a third focusing ring S4, and the auxiliary lens barrel S5 plays a role in rotating connection, so that the second focusing ring S3 and the third focusing ring S4 are connected together and connected with the interface S6.

The third cemented lens B03 of the rear fixed group a03 is directly fitted into the main barrel S1 through the outer clamping ring S7.

The zoom monitoring lens is a continuous zoom system, and the rear working distance is unchanged under any focal length, namely, an imaging picture can be adjusted to be clear all the time in the zooming process.

Claims

1. A zoom monitoring lens is characterized in that: the zoom lens comprises a zoom group, a diaphragm, a compensation group and a rear fixed group in sequence from an object side to an image side, wherein the zoom group consists of a first lens with negative focal power, a second lens with negative focal power and a third lens with positive focal power, the compensation group consists of a fourth lens with positive focal power, a fifth lens with positive focal power, a sixth lens with negative focal power, a seventh lens with positive focal power, an eighth lens with positive focal power, a ninth lens with negative focal power, a tenth lens with positive focal power and an eleventh lens with positive focal power, the fifth lens with positive focal power and the sixth lens with negative focal power form a first cemented lens with negative focal power, the eighth lens with negative focal power and the ninth lens with negative focal power form a second cemented lens with negative focal power, and the fixed group consists of a twelfth lens with positive focal power and a thirteenth lens with positive focal power, the twelfth lens with negative focal power and the thirteenth lens group with positive focal power become a third cemented lens with positive focal power, and the first lens with negative focal power is a meniscus lens with negative focal power and convex to the object; the second lens with negative focal power is a biconcave lens with negative focal power; the third lens with positive focal power is a meniscus lens with positive focal power and convex to the object; the fourth lens with positive focal power is a biconvex lens with positive focal power; the fifth lens with positive focal power is a biconvex lens with positive focal power, and the sixth lens with negative focal power is a biconcave lens with negative focal power; the seventh lens with positive focal power is a biconvex lens with positive focal power; the eighth lens with positive focal power is a biconvex lens with positive focal power; the ninth lens with negative focal power is a biconcave lens with negative focal power; the tenth lens with positive focal power is a meniscus lens with positive focal power and convex towards the image; the eleventh lens with positive focal power is a biconvex lens with positive focal power; the twelfth lens with negative focal power is a biconcave lens with negative focal power; the thirteenth lens with positive focal power is a biconvex lens with positive focal power.

2. A zoom monitoring lens according to claim 1, characterized in that: and a diaphragm is arranged between the zooming group and the compensation group.

3. A zoom monitoring lens according to claim 1, characterized in that: the first lens to the thirteenth lens are all spherical lenses.

4. A zoom monitoring lens according to claim 1, characterized in that: in the process that the focal length of the zoom lens is changed from 4mm to 16mm, the change range of the distance between the zoom lens group and the compensation group is 53.52-3.84 mm, and the change range of the distance between the compensation group and the rear fixed group is 1.39-15.59 mm.