CN210742592U - Infrared lens capable of rapidly switching view field - Google Patents
Infrared lens capable of rapidly switching view field Download PDFInfo
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- CN210742592U CN210742592U CN201921908140.3U CN201921908140U CN210742592U CN 210742592 U CN210742592 U CN 210742592U CN 201921908140 U CN201921908140 U CN 201921908140U CN 210742592 U CN210742592 U CN 210742592U
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- 230000003287 optical effect Effects 0.000 description 7
- 230000009977 dual effect Effects 0.000 description 2
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Abstract
The utility model discloses an infrared camera lens of fast switch over visual field, include: the lens comprises a lens base, a lens assembly, a cam and a focusing ring; the cam is provided with a cam groove, and the lens assembly is provided with a guide pin positioned in the cam groove; the cam groove comprises at least one steep slope section and at least two sections of fine adjustment sections, the inclination angle of each fine adjustment section is smaller than that of each steep slope section, and the inclination angle is an included angle between the length direction of the cam groove and the bottom surface of the cam in a flat state of the cam; the rotating focusing ring drives the cam to rotate so that the guide pin moves along the axial direction of the focusing ring and the lens assembly is close to or far away from the lens base. The setting of steep section makes the speed that leads nail edge axial displacement improve to make the process of focusing quicker, in addition, because the inclination of steep section is greater than the inclination of fine setting section, consequently, compare single inclination among the prior art, under the condition of realizing the same focusing result, can make the length of cam groove shorten, reduce cam axial direction's size.
Description
Technical Field
The utility model relates to an imaging device technical field, more specifically say, relate to an infrared camera lens of fast switch over visual field.
Background
With the continuous development of the infrared thermal imaging technology, the application scenes and the requirements of an infrared optical system are more and more, the infrared optical system is mainly applied to the fields of monitoring, temperature measurement, military and the like, and the infrared optical system can be divided into a single-view-field lens, a double-view-field lens and a multi-view-field lens according to different application scenes.
At present, the electric focusing structural mode is adopted for double-view-field and multi-view-field lenses in China, and the operation of a lens motor is controlled through an upper computer, so that the switching of different view fields is achieved. In the prior art, a dual-view-field and multi-view-field lens is mainly driven by a host computer to realize different view fields, and a motor focusing structure is added to a lens optical mechanism, so that the overall structure of the lens is large, a motor circuit is complex, the lens is driven by a power supply, and the phenomenon of inaccurate focusing can occur at different temperatures; for the manual focusing lens, the lens cannot be automatically switched between different view fields when the lens is separated from the driving motor and the upper computer, and the time required for manual focusing is long, as shown in fig. 1 and 2, the conventional cam groove 01 has a single inclination slope, and a cam groove which is long enough is required for the multi-view-field lens, so that the length of the lens is increased.
In summary, how to provide an infrared lens capable of rapidly switching a viewing field is an urgent problem to be solved by those skilled in the art.
SUMMERY OF THE UTILITY MODEL
In view of this, the utility model aims at providing an infrared camera lens of fast switch over visual field can realize high-efficient and accurate focusing to can reduce the structure size.
In order to achieve the above object, the present invention provides the following technical solutions:
an infrared lens for fast switching field of view, comprising: the focusing device comprises a lens base, a lens assembly connected with the lens base, a cam rotatably arranged on the lens base and a focusing ring connected with the cam;
the cam is provided with a cam groove, and the lens assembly is provided with a guide pin positioned in the cam groove; the cam groove comprises at least one steep slope section and at least two fine adjustment sections, the inclination angle of each fine adjustment section is smaller than that of the steep slope section, and the inclination angle is an included angle between the length direction of the cam groove and the bottom surface of the cam in the flat laying state of the cam;
the focusing ring is rotated to drive the cam to rotate, so that the guide pin moves along the axial direction of the focusing ring, and the lens assembly is close to or far away from the lens base.
Preferably, the rotation angle of any section of the fine adjustment section corresponding to the focusing ring is 65-75 degrees, and the rotation angle of any section of the steep slope section corresponding to the focusing ring is 5-15 degrees.
Preferably, the rotation angles of the fine adjustment sections corresponding to the focusing rings are all the same and are all 70 degrees, and the rotation angles of the steep slope sections corresponding to the focusing rings are all the same and are all 10 degrees.
Preferably, the inclination angle of the fine adjustment section is 2-6 degrees, and the inclination angle of the steep section is 45-55 degrees.
Preferably, the fine adjustment section and the steep slope section are arranged at intervals, and both ends of the cam groove in the length direction are the fine adjustment section.
Preferably, a transition fillet is arranged at the connection position of the fine adjustment section and the steep slope section.
Preferably, the fine adjustment section has the same width as the steep section.
Preferably, the one end of cam groove length direction is provided with first semicircle, and the other end is provided with the second semicircle, just the radius of first semicircle, the radius of second semicircle is half of the cam groove width.
The utility model provides an infrared camera lens of fast switch-over field of view, include: the focusing device comprises a lens base, a lens assembly connected with the lens base, a cam rotatably arranged on the lens base and a focusing ring connected with the cam; the cam is provided with a cam groove, and the lens assembly is provided with a guide pin positioned in the cam groove; the cam groove comprises at least one steep slope section and at least two sections of fine adjustment sections, the inclination angle of each fine adjustment section is smaller than that of each steep slope section, and the inclination angle is an included angle between the length direction of the cam groove and the bottom surface of the cam in a flat state of the cam; the rotating focusing ring drives the cam to rotate so that the guide pin moves along the axial direction of the focusing ring and the lens assembly is close to or far away from the lens base.
In the use, thereby can drive the cam through rotating the focusing ring and rotate, cam pivoted in-process can drive the cam groove and rotate, because the cam groove is provided with one section at least steep slope section and two sections at least sections fine setting sections, consequently, cam pivoted in-process leads the nail and can take place to remove at the axial, when leading the nail and being located the fine setting section, the nail is more slow along axial translation rate to the cam rotation in-process of leading, when leading the nail and being located the steep slope section, the nail is faster along axial translation rate to the cam rotation in-process of leading.
The setting of steep slope section makes the speed that leads the nail along axial displacement improve to make the process of focusing quicker, in addition, because the inclination of steep slope section is greater than the inclination of fine setting section, consequently, compare single inclination among the prior art, under the condition of realizing the same focusing result, can make the length of cam groove shorten, thereby reduce cam axial direction's size, be favorable to realizing the miniaturization and the lightweight of structure.
Drawings
In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings required to be used in the description of the embodiments or the prior art will be briefly described below, it is obvious that the drawings in the following description are only embodiments of the present invention, and for those skilled in the art, other drawings can be obtained according to the provided drawings without creative efforts.
FIG. 1 is a schematic diagram of a prior art cam groove configuration;
FIG. 2 is a schematic view of the cam groove of FIG. 1 in a flat state;
fig. 3 is a schematic structural diagram of an embodiment of an infrared lens for fast switching a viewing field according to the present invention;
FIG. 4 is a schematic structural diagram of the infrared lens with rapidly switched fields of view of FIG. 3 with a focus ring removed;
fig. 5 is a schematic diagram of a tiled state of cam grooves in a dual field lens provided by the present invention;
fig. 6 is a schematic diagram of a tiled state of cam grooves in a multi-view-field lens.
In FIGS. 1-6:
01 is the existing cam groove, 1 is the focusing ring, 2 is the lens base, 3 is the cam groove, 31 is the steep section, 32 is the fine setting section.
Detailed Description
The technical solutions in the embodiments of the present invention will be described clearly and completely with reference to the accompanying drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only some embodiments of the present invention, not all embodiments. Based on the embodiments in the present invention, all other embodiments obtained by a person skilled in the art without creative work belong to the protection scope of the present invention.
The core of the utility model is to provide an infrared camera lens of fast switch over visual field, at the in-process of focusing, compare in prior art, the switching of the different visual fields of realization that can be faster.
Referring to fig. 1-6, fig. 1 is a schematic structural diagram of a cam groove in the prior art; FIG. 2 is a schematic view of the cam groove of FIG. 1 in a flat state; fig. 3 is a schematic structural diagram of an embodiment of an infrared lens for fast switching a viewing field according to the present invention; FIG. 4 is a schematic structural diagram of the infrared lens with rapidly switched fields of view of FIG. 3 with a focus ring removed; fig. 5 is a schematic diagram of a tiled state of cam grooves in a dual field lens provided by the present invention; fig. 6 is a schematic diagram of a tiled state of cam grooves in a multi-view-field lens.
The infrared lens of fast switch field of view that this embodiment provided includes: the lens comprises a lens base 2, a lens assembly connected with the lens base 2, a cam rotatably arranged on the lens base 2 and a focusing ring 1 connected with the cam; the cam is provided with a cam groove 3, and the lens assembly is provided with a guide pin positioned in the cam groove 3; the cam groove 3 comprises at least one steep slope section 31 and at least two fine adjustment sections 32, the inclination angle of the fine adjustment sections 32 is smaller than that of the steep slope section 31, and the inclination angle is the included angle between the length direction of the cam groove 3 and the bottom surface of the cam in the flat state of the cam; the focusing ring 1 is rotated to drive the cam to rotate, so that the guide pin moves along the axial direction of the focusing ring 1, and the lens assembly is close to or far away from the lens base 2.
It should be noted that, as shown in fig. 5 and 6, the inclination angle of the fine adjustment section 32 is an included angle between the length direction of the fine adjustment section 32 and the plane of the bottom surface of the cam when the cam is in a flat state, where the plane of the bottom surface of the cam is parallel to the plane of the lens; the inclination angle of the steep slope section 31 is the angle between the length direction of the steep slope section 31 and the plane of the bottom surface of the cam in the flat laying state of the cam, wherein the plane of the bottom surface of the cam is parallel to the plane of the lens.
In the using process, the focusing ring 1 is connected with the cam, so that the cam can be driven to rotate by rotating the focusing ring 1, the cam groove 3 can be driven to rotate in the rotating process of the cam, and the cam groove 3 is provided with at least one steep slope section 31 and at least two fine adjustment sections 32, so that the guide pin can move in the axial direction in the rotating process of the cam, as shown in fig. 4, when the cam rotates clockwise, the guide pin can move in the direction far away from the lens base 2 along with the rotation of the cam, and when the cam rotates anticlockwise, the guide pin can move in the direction close to the lens base 2 along with the rotation of the cam; when the guide nail is positioned in the fine adjustment section 32, the guide nail moves slowly along the axial direction in the rotation process of the cam, and when the guide nail is positioned in the steep section 31, the guide nail moves fast along the axial direction in the rotation process of the cam.
The setting of steep section 31, focusing ring 1 rotates under the condition of the same angle, can make lead the nail along the longer distance of axial displacement, thereby make the speed that leads the nail along axial displacement improve, make the process of focusing quicker, in addition, because the inclination of steep section 31 is greater than the inclination of fine setting section 32, therefore, compare in single inclination among the prior art, under the condition of realizing the same focusing result, can make the length of cam groove 3 shorten, thereby reduce the size of cam axial direction, be favorable to realizing the miniaturization and the lightweight of structure.
On the basis of the above embodiment, in consideration of the actual focusing process of the lens, the rotation angle of any one section of the fine adjustment section 32 corresponding to the focus ring 1 may be 65 ° to 75 °, and the rotation angle of any one section of the steep section 31 corresponding to the focus ring 1 may be 5 ° to 15 °.
Of course, the rotation angles of the focusing ring 1 corresponding to the fine tuning section 32 and the steep slope section 31 may also be other values, which are determined according to the actual situation and are not described herein again.
Preferably, the rotation angles of any one section of the fine adjustment section 32 corresponding to the focusing ring 1 are all the same and are all 70 °, and the rotation angles of any one section of the steep section 31 corresponding to the focusing ring 1 are all the same and are all 10 °.
For example, in a dual-field lens, the cam groove 3 may include two fine adjustment sections 32 and a steep section 31 disposed between the two fine adjustment sections 32, when the focus ring 1 is located in the range of 0 ° to 70 °, the optical structure portion represents a small-field lens, when the focus ring 1 is located in the range of 80 ° to 150 °, the optical structure portion represents a large-field lens, and when the focus ring 1 is located in the range of 70 ° to 80 °, the optical structure portion represents a portion for switching between the small-field lens and the large-field lens, so that the fast switching of the fields of view can be achieved, the unnecessary operation time during field switching is reduced, and the fine adjustment precision requirement of the field accessory is maintained.
On the basis of the above embodiment, the inclination angle of the fine adjustment section 32 can be set to 2-6 °, and the inclination angle of the steep slope section 31 can be set to 45-55 °.
Preferably, the angle of inclination of the fine adjustment section 32 is 4 ° and the angle of inclination of the steep slope section 31 is 50 °.
On the basis of the above embodiment, in order to maintain the focusing accuracy in the original fine adjustment process, the fine adjustment section 32 and the steep slope section 31 may be provided at an interval, and both ends of the cam groove 3 in the length direction are the fine adjustment sections 32.
In the using process, the adjustment precision is high in the focusing process of the fine adjustment section 32, one fine adjustment section 32 corresponds to one view field, the steep slope section 31 is arranged between the two fine adjustment sections 32, the quick switching between different view fields can be realized, and the fine adjustment precision is ensured.
On the basis of the above embodiment, in order to avoid the phenomenon that the transition between the fine adjustment section 32 and the steep slope section 31 is jammed during the focusing process, a transition fillet may be provided between the fine adjustment section 32 and the steep slope section 31.
Preferably, the fine adjustment section 32 is the same width as the steep slope section 31.
On the basis of the above embodiment, in order to facilitate the processing of the cam groove 3, a first semicircular arc may be provided at one end of the cam groove 3 in the length direction, and a second semicircular arc may be provided at the other end, and the radius of the first semicircular arc and the radius of the second semicircular arc are both half of the width of the cam groove 3.
It should be noted that, in the present application, the first and second half arcs mentioned in the first half arc and the second half arc are only used for distinguishing the difference of the positions, and are not sequentially distinguished.
The embodiments in the present description are described in a progressive manner, each embodiment focuses on differences from other embodiments, and the same and similar parts among the embodiments are referred to each other. The utility model provides an arbitrary compound mode of all embodiments all is in this utility model's a protection scope, does not do here and gives unnecessary details.
It is right above the utility model provides an infrared camera lens of fast switch over visual field has carried out detailed introduction. The principles and embodiments of the present invention have been explained herein using specific examples, and the above descriptions of the embodiments are only used to help understand the method and its core ideas of the present invention. It should be noted that, for those skilled in the art, without departing from the principle of the present invention, the present invention can be further modified and modified, and such modifications and modifications also fall within the protection scope of the appended claims.
Claims (8)
1. An infrared lens for rapidly switching a field of view, comprising: the lens comprises a lens base (2), a lens assembly connected with the lens base (2), a cam rotatably arranged on the lens base (2), and a focusing ring (1) connected with the cam;
the cam is provided with a cam groove (3), and the lens assembly is provided with a guide pin positioned in the cam groove (3); the cam groove (3) comprises at least one steep slope section (31) and at least two fine adjustment sections (32), the inclination angle of each fine adjustment section (32) is smaller than that of the steep slope section (31), and the inclination angle is an included angle between the length direction of the cam groove (3) and the bottom surface of the cam in the flat state of the cam;
the focusing ring (1) is rotated to drive the cam to rotate, so that the guide pin moves along the axial direction of the focusing ring (1), and the lens assembly is close to or far away from the lens base (2).
2. The IR lens for fast switching of field of view according to claim 1, wherein any one of the fine adjustment segments (32) has a rotation angle of 65 ° -75 ° with respect to the focus ring (1), and any one of the steep segments (31) has a rotation angle of 5 ° -15 ° with respect to the focus ring (1).
3. The infrared lens for rapidly switching the field of view according to claim 2, wherein the rotation angles of any one section of the fine adjustment section (32) corresponding to the focus ring (1) are the same and are all 70 °, and the rotation angles of any one section of the steep section (31) corresponding to the focus ring (1) are the same and are all 10 °.
4. The infrared lens for rapidly switching a field of view according to claim 1, wherein an inclination angle of the fine adjustment section (32) is 2 ° -6 °, and an inclination angle of the steep section (31) is 45 ° -55 °.
5. The infrared lens for rapidly switching the visual field according to claim 1, wherein the fine adjustment section (32) is provided at a distance from the steep slope section (31), and both ends of the cam groove (3) in the length direction are the fine adjustment sections (32).
6. The IR lens with fast switching field of view according to any of claims 1 to 5, characterized in that the junction of the fine adjustment section (32) and the steep section (31) is provided with a transition fillet.
7. The fast switching field of view infrared lens of claim 6, characterized in that said fine adjustment segment (32) is the same width as said steep segment (31).
8. The infrared lens for rapidly switching the visual field according to claim 7, wherein a first semicircular arc is disposed at one end of the cam groove (3) in the length direction, a second semicircular arc is disposed at the other end, and the radius of the first semicircular arc and the radius of the second semicircular arc are both half of the width of the cam groove (3).
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201921908140.3U CN210742592U (en) | 2019-11-06 | 2019-11-06 | Infrared lens capable of rapidly switching view field |
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| Application Number | Priority Date | Filing Date | Title |
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| CN201921908140.3U CN210742592U (en) | 2019-11-06 | 2019-11-06 | Infrared lens capable of rapidly switching view field |
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| CN210742592U true CN210742592U (en) | 2020-06-12 |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN113391456A (en) * | 2021-08-16 | 2021-09-14 | 山东省科学院海洋仪器仪表研究所 | Electronic angle mirror that expands of laser initiative formation of image illumination light source |
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2019
- 2019-11-06 CN CN201921908140.3U patent/CN210742592U/en active Active
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN113391456A (en) * | 2021-08-16 | 2021-09-14 | 山东省科学院海洋仪器仪表研究所 | Electronic angle mirror that expands of laser initiative formation of image illumination light source |
| CN113391456B (en) * | 2021-08-16 | 2021-11-26 | 山东省科学院海洋仪器仪表研究所 | Electronic angle mirror that expands of laser initiative formation of image illumination light source |
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