CN216718735U

CN216718735U - Objective lens mechanism and laser range finder

Info

Publication number: CN216718735U
Application number: CN202122641005.0U
Authority: CN
Inventors: 陈永泽; 梁海; 吴志勇
Original assignee: Shenzhen Hengtian Weiyan Technology Co ltd
Current assignee: Shenzhen Hengtian Weiyan Technology Co ltd
Priority date: 2021-10-29
Filing date: 2021-10-29
Publication date: 2022-06-10
Anticipated expiration: 2031-10-29

Abstract

The utility model discloses an objective mechanism and a laser range finder, wherein the objective mechanism comprises a shell, a machine core and an objective lens group, wherein the machine core is arranged in the shell; the objective lens group is arranged in the movement and sealed with the movement, a waterproof condensation coating film with a preset thickness is formed on the outer surface of an optical lens of the objective lens group, and the waterproof condensation coating film is used for dispersing water vapor on the surface of the optical lens. The utility model avoids the influence of water drops on the optical lens on the optical signal, and has higher distance measurement effect and precision.

Description

Objective lens mechanism and laser range finder

Technical Field

The utility model relates to the technical field of laser range finding, in particular to an objective mechanism and a laser range finder.

Background

A laser rangefinder is an instrument that accurately measures the distance to a target using laser light. When the laser distance measuring instrument works, a thin laser beam is emitted to a target, the laser beam reflected by the target is received by the photoelectric element, the time from the emitting to the receiving of the laser beam is measured by the timer, and the distance from an observer to the target is calculated. The distance, area and volume can be measured, and the measurement can be carried out indoors and outdoors. In the correlation technique, because the service environment of the laser range finder is complicated, water drops are easily stained on the optical lens, so that the optical signal is easily influenced by the water drops, and the ranging effect and precision can be influenced.

SUMMERY OF THE UTILITY MODEL

The present invention is directed to solving, at least to some extent, one of the technical problems in the related art. To this end, an object of the present invention is to provide an objective lens mechanism comprising:

a housing;

the movement is arranged in the shell;

the objective lens group is arranged in the movement and is mutually sealed with the movement, a waterproof condensation coating film with a preset thickness is formed on the outer surface of an optical lens of the objective lens group, and the waterproof condensation coating film is used for dispersing water vapor on the surface of the optical lens.

Preferably, the movement is provided with an optical path channel, an internal thread is arranged in the optical path channel, and the objective lens group is arranged in the optical path channel and is fixed with the internal thread in a threaded manner.

Preferably, a first sealing ring is sleeved on the outer peripheral surface of the objective lens group, and the first sealing ring is in interference fit with the light path channel and used for sealing a gap between the objective lens group and the movement.

Preferably, the objective lens group includes:

the lens cone is arranged in the light path channel and extends along the axial direction of the light path channel, and the optical lens and the lens cone are arranged in a mutually sealed mode;

the limiting ring is arranged in the lens barrel and is abutted against the optical lens so as to limit the optical lens in the lens barrel.

Preferably, the lens barrel includes a first fixing portion and a second fixing portion integrally provided, the first fixing portion extends along an axial direction of the second fixing portion, and a diameter of the first fixing portion is smaller than a diameter of the second fixing portion.

Preferably, the outer surface of the first fixing part is provided with an external thread, and the external thread is in threaded connection with the internal thread.

Preferably, the optical lens is disposed in the second fixing portion, one side of the optical lens is adjacent to the first fixing portion, and the limiting ring is disposed on the other side of the optical lens and is in threaded connection with the second fixing portion.

Preferably, a second sealing ring is arranged between the optical lens and the second fixing portion, and the second sealing ring is used for sealing a gap between the optical lens and the lens barrel.

Preferably, the predetermined thickness is 10 to 30 nm.

The utility model also provides a laser range finder which comprises the objective lens mechanism.

According to the objective mechanism provided by the utility model, the waterproof condensation coating film with the preset thickness is arranged on the outer surface of the optical lens, so that water vapor on the surface of the optical lens can be dispersed through the waterproof condensation coating film when the objective mechanism is used in places such as the open air, the optical lens is prevented from being stained with water drops to influence optical signals, and the distance measurement effect and precision are higher.

Additional aspects and advantages of the utility model will be set forth in part in the description which follows and, in part, will be obvious from the description, or may be learned by practice of the utility model.

Drawings

In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings 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 some embodiments of the present invention, and for those skilled in the art, other drawings can be obtained according to the structures shown in the drawings without creative efforts.

Fig. 1 is a schematic structural view of an objective lens mechanism provided in an embodiment of the present invention;

fig. 2 is a partial structural sectional view of an objective lens mechanism provided in an embodiment of the present invention;

fig. 3 is an exploded view of an objective lens mechanism provided in an embodiment of the present invention;

fig. 4 is an exploded view of the objective lens assembly provided in the embodiment of the present invention.

The reference numbers illustrate:

10. a housing; 20. a movement; 201. an optical channel; 30. an objective lens group; 31. an optical lens; 32. a lens barrel; 321. a first fixed part; 322. a second fixed part; 33. a limiting ring; 40. a first seal ring; 50. and a second seal ring.

The implementation, functional features and advantages of the objects of the present invention will be further explained with reference to the accompanying drawings.

Detailed Description

Reference will now be made in detail to embodiments of the present invention, examples of which are illustrated in the accompanying drawings, wherein like or similar reference numerals refer to the same or similar elements or elements having the same or similar function throughout. The embodiments described below with reference to the drawings are exemplary and intended to be illustrative of the present invention and should not be construed as limiting the present invention, and all other embodiments that can be obtained by one skilled in the art based on the embodiments of the present invention without inventive efforts shall fall within the scope of protection of the present invention.

In the description of the present invention, it is to be understood that the terms "central," "longitudinal," "lateral," "length," "width," "thickness," "upper," "lower," "front," "rear," "left," "right," "vertical," "horizontal," "top," "bottom," "inner," "outer," "clockwise," "counterclockwise," "axial," "circumferential," "radial," and the like are used in the orientations and positional relationships indicated in the drawings for convenience in describing the present invention and to simplify the description, and are not intended to indicate or imply that the referenced devices or elements must have a particular orientation, be constructed and operated in a particular orientation, and are therefore not to be considered limiting of the present invention.

Furthermore, the terms "first", "second" and "first" are used for descriptive purposes only and are not to be construed as indicating or implying relative importance or implicitly indicating the number of technical features indicated. Thus, a feature defined as "first" or "second" may explicitly or implicitly include one or more of that feature. In the description of the present invention, "a plurality" means two or more unless specifically defined otherwise.

In the present invention, unless otherwise explicitly stated or limited, the terms "mounted," "connected," "fixed," and the like are to be construed broadly and may, for example, be fixedly connected, detachably connected, or integrally connected; can be mechanically or electrically connected; they may be connected directly or indirectly through intervening media, or they may be interconnected between two elements. The specific meanings of the above terms in the present invention can be understood by those skilled in the art according to specific situations.

In the present invention, unless otherwise expressly stated or limited, "above" or "below" a first feature means that the first and second features are in direct contact, or that the first and second features are not in direct contact but are in contact with each other via another feature therebetween. Also, the first feature being "on," "above" and "over" the second feature includes the first feature being directly on and obliquely above the second feature, or merely indicating that the first feature is at a higher level than the second feature. A first feature being "under," "below," and "beneath" a second feature includes the first feature being directly under and obliquely below the second feature, or simply meaning that the first feature is at a lesser elevation than the second feature.

The objective lens mechanism and the laser rangefinder according to the embodiments of the present invention will be described in detail below with reference to the accompanying drawings.

Referring to fig. 1 to 3, an objective lens mechanism provided in an embodiment of the present invention includes a housing 10, a movement 20, and an objective lens group 30, where the movement 20 is disposed in the housing 10; the objective lens assembly 30 is disposed in the movement 20 and sealed with the movement 20, and the objective lens assembly 30 has an outer surface of the optical lens 31 formed with a water condensation preventing coating (not shown) having a predetermined thickness for dispersing water vapor on the surface of the optical lens 31.

Wherein the predetermined thickness is 10-30 nm; for example, the thickness of the waterproof condensed film can be 18nm, and the like, and the objective lens group 30 and the movement 20 are hermetically arranged, so that water vapor can be prevented from entering and affecting internal circuit components, and the safety is higher; it can be understood that, when the laser range finder operates, the laser light reflected from the target object can be reflected to the human eye through the objective lens assembly 30 and the eyepiece for the human eye to watch.

According to the objective mechanism provided by the utility model, the waterproof condensation coating film with the preset thickness is arranged on the outer surface of the optical lens 31, so that water vapor on the surface of the optical lens 31 can be dispersed through the waterproof condensation coating film when the objective mechanism is used in places such as the open air, the optical lens 31 is prevented from being stained with water drops to influence optical signals, and the distance measurement effect and precision are higher.

Referring to fig. 3, the movement 20 has an optical path, an internal thread is provided in the optical path, and the objective lens assembly 30 is provided in the optical path and screwed to the internal thread. In this embodiment, when assembling objective lens group 30 and core 20, can carry out the thread tightening with objective lens group 30 and core 20 for objective lens group 30 is more simple and convenient in the equipment process, and can adjust the interval between objective lens group 30 and the eyepiece, thereby adjusts the definition of formation of image to the object, adjusts simply accurate.

Further, a first sealing ring 40 is sleeved on the outer peripheral surface of the objective lens assembly 30, and the first sealing ring 40 is in interference fit with the optical path channel to seal a gap between the objective lens assembly 30 and the movement 20. In this embodiment, through set up first sealing washer 40 between objective lens group 30 and core 20, can avoid in external steam gets into the main casing from the light path passageway, improve holistic leakproofness for when using in places such as open air, the security is higher, long service life.

Referring to fig. 3 and 4, the objective lens assembly 30 includes a lens barrel 32 and a limiting ring 33, the lens barrel 32 is disposed in the optical path channel and extends along an axial direction of the optical path channel, and the optical lens 31 and the lens barrel 32 are sealed with each other; the limiting ring 33 is disposed in the lens barrel 32 and abuts against the optical lens 31 to limit the optical lens 31 in the lens barrel 32.

In this embodiment, the optical lens 31 may be installed in the lens barrel 32, and then the limiting ring 33 is installed to limit the optical lens 31 therein, so that in the distance measurement process, the laser may pass through the optical lens 31 via the limiting ring 33 and be emitted to the eyepiece through the optical path channel, thereby performing observation and distance measurement; it can be understood that, by limiting the optical lens 31 in the lens barrel 32 by the limiting ring 33, the optical lens 31 can be ensured to be more stable in the lens barrel 32, and the assembly is simpler and more convenient.

Further, the lens barrel 32 includes a first fixing portion 321 and a second fixing portion 322 integrally provided, the first fixing portion 321 extends along an axial direction of the second fixing portion 322, and a diameter of the first fixing portion 321 is smaller than a diameter of the second fixing portion 322. Wherein, the outer surface of the first fixing portion 321 is provided with an external thread, and the external thread is in threaded connection with the internal thread; it is understood that the first fixing portion 321 and the second fixing portion 322 may be configured in a cylindrical shape, and may be integrally fitted with the optical channel 201 to be mounted in the movement 20 to a higher degree.

Further, the optical lens 31 is disposed in the second fixing portion 322, and one side of the optical lens 31 is adjacent to the first fixing portion 321, and the limiting ring 33 is disposed on the other side of the optical lens 31 and is in threaded connection with the second fixing portion 322. In this embodiment, the diameter of the optical lens 31 is matched with the inner diameter of the second fixing portion 322, and when the optical lens 31 is assembled, the optical lens 31 is firstly installed in the second fixing portion 322, and then the inner wall of the limiting ring 33 and the inner wall of the second fixing portion 322 are screwed, so that the optical lens 31 can be fixed more stably, and the assembly is simpler and more convenient.

Preferably, a second sealing ring 50 is disposed between the optical lens 31 and the second fixing portion 322, and the second sealing ring 50 is used for closing a gap between the optical lens 31 and the lens barrel 32. Wherein, second sealing washer 50 is with the back of the clearance seal between lens cone 32 and the optical lens 31, can avoid steam to get into from between optical lens 31 and the lens cone 32, has promoted whole sealed effect, and life is longer.

The laser range finder provided in the embodiment of the utility model comprises the objective lens mechanism. Wherein, this laser range finder can adopt foretell objective mechanism to measure a distance for can be through preventing the water logging coating film with the steam dispersion on optical lens 31 surface when using such as open air, avoided optical lens 31 to be stained with the water droplet and influence optical signal, the effect and the precision of range finding are higher.

In the description herein, references to the description of the term "one embodiment," "some embodiments," "an example," "a specific example," or "some examples," etc., mean that a particular feature, structure, material, or characteristic described in connection with the embodiment or example is included in at least one embodiment or example of the utility model. In this specification, the schematic representations of the terms used above are not necessarily intended to refer to the same embodiment or example. Furthermore, the particular features, structures, materials, or characteristics described may be combined in any suitable manner in any one or more embodiments or examples. Furthermore, various embodiments or examples and features of different embodiments or examples described in this specification can be combined and combined by one skilled in the art without contradiction.

The above description is only a preferred embodiment of the present invention, and not intended to limit the scope of the present invention, and all modifications and equivalents of the technical solutions of the present invention, which are made by using the contents of the present specification and the accompanying drawings, or directly/indirectly applied to other related technical fields, are included in the scope of the present invention.

Claims

1. An objective lens mechanism, comprising:

a housing;

the movement is arranged in the shell;

2. The objective mechanism according to claim 1, wherein the movement has an optical path channel with an internal thread therein, and the objective lens group is disposed in the optical path channel and screwed to the internal thread.

3. An objective mechanism as claimed in claim 2, wherein a first sealing ring is sleeved on an outer peripheral surface of the objective lens group, and the first sealing ring is in interference fit with the optical path channel to seal a gap between the objective lens group and the movement.

4. The objective mechanism according to claim 2, wherein the objective lens group comprises:

5. The objective lens mechanism according to claim 4, wherein the lens barrel includes a first fixing portion and a second fixing portion that are integrally provided, the first fixing portion extends in an axial direction of the second fixing portion, and a diameter of the first fixing portion is smaller than a diameter of the second fixing portion.

6. An objective lens mechanism as recited in claim 5, wherein the first fixing portion is provided with an external thread on an outer surface thereof, and the external thread is screwed with the internal thread.

7. The objective lens mechanism according to claim 5, wherein the optical lens is disposed in the second fixing portion with one side of the optical lens adjacent to the first fixing portion, and the retainer ring is disposed on the other side of the optical lens and is screwed to the second fixing portion.

8. The objective lens mechanism according to claim 5, wherein a second sealing ring is disposed between the optical lens and the second fixing portion, and the second sealing ring is used for sealing a gap between the optical lens and the lens barrel.

9. An objective lens arrangement according to claim 1, wherein the predetermined thickness is 10-30 nm.

10. A laser rangefinder comprising an objective mechanism as claimed in any one of claims 1 to 9.