CN208459663U - A kind of safety monitoring camera lens - Google Patents
A kind of safety monitoring camera lens Download PDFInfo
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- CN208459663U CN208459663U CN201821133157.1U CN201821133157U CN208459663U CN 208459663 U CN208459663 U CN 208459663U CN 201821133157 U CN201821133157 U CN 201821133157U CN 208459663 U CN208459663 U CN 208459663U
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- lens
- safety monitoring
- monitoring camera
- light
- fixing shell
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Abstract
The utility model relates to field of optical lens, disclose a kind of safety monitoring camera lens, including fixing shell, and fixing shell is interior to be disposed with the first lens, the second lens, the third lens and the 4th lens along the path of light；First lens are concavees lens, and the first lens protrude setting far from the side of the second lens, and the first lens are recessed close to the side of the second lens and are arranged；Second lens and the third lens are convex lens；4th lens are concavees lens, 4th lens are recessed towards the side of the third lens and are arranged, 4th lens protrude setting far from the side of the third lens, the utility model has the following advantages that and effect: this programme utilizes new mechanical structure, pass through the first lens of setting, the second lens, the third lens and the 4th lens, so that camera lens transmitted light increases, while light can preferably be projected to the imaging sensor of video camera, so that last imaging is relatively clear.
Description
Technical field
The utility model relates to a kind of optical lens, more specifically, it relates to a kind of safety monitoring camera lens.
Background technique
Security lens, alias CCTV camera lens, monitoring camera are for being matched with video camera use in safety and protection system
, it is the eyes in security industry.
Currently, the video camera for safety monitoring is needed in day and night all in operating status, but day and night
External environment luminance difference it is larger, camera lens can preferably focus daytime, and image is relatively clear；After to evening, by
It is reduced in external environment brightness, entering amount light in camera lens reduces, and causes the received image of video camera to more obscuring.
Utility model content
In view of the deficienciess of the prior art, having the utility model lies in that providing a kind of safety monitoring camera lens at night
Make the effect that image is relatively clear.
To achieve the above object, the utility model provides following technical solution: a kind of safety monitoring camera lens, including fixation
Shell, the fixing shell is interior to be disposed with the first lens, the second lens, the third lens and the 4th thoroughly along the path of light
Mirror；First lens are concavees lens, and first lens protrude setting far from the side of second lens, and described first thoroughly
Mirror is recessed close to the side of second lens and is arranged；Second lens and the third lens are convex lens；Described 4th thoroughly
Mirror is concavees lens, and the 4th lens are recessed towards the side of the third lens and are arranged, and the 4th lens are saturating far from third
Protrude setting in the side of mirror.
By using above-mentioned technical proposal, light is dissipating after convex lens, then saturating by the second lens and third
Mirror is converged, and is dissipated finally by the 4th lens；Setting is protruded in the side of first lens, and the first lens are converged
Gather more light；The convergence of second lens and the third lens is so that light is more concentrated, and the diverging of the 4th lens is so that light
It more uniformly exposes at the imaging sensor of video camera, so that video camera can receive more in day and night
Clearly image.
The utility model is further arranged to: it is provided with spacer ring between first lens and second lens, it is described
One end of spacer ring towards second lens offers the holding tank accommodated for second lens.
By using above-mentioned technical proposal, spacer ring makes the position between the first lens and the second lens be not susceptible to move,
Holding tank keeps the position of the second lens relatively stable, so that the light through the second lens be made to be not susceptible to change, improves most
The effect being imaged afterwards.
The utility model is further arranged to: being provided with diaphragm between second lens and the third lens.
By using above-mentioned technical proposal, diaphragm plays restriction effect to light beam, and light is made to be not easy to be irradiated to the third lens
Edge or the useless part of the third lens, to reduce the generation of interference light, so that last imaging is more clear
It is clear.
The utility model is further arranged to: the F value of the diaphragm is 2.2, first lens, the second lens, third
The image circle diameter that lens and the 4th lens are constituted is 6.85mm.
By using above-mentioned technical proposal, the F value of diaphragm is 2.2, and image circle diameter is 6.85mm, meets light-inletting quantity more
The light-inletting quantity of the illumination variation at night and daytime, daytime will not be excessive, and the light-inletting quantity in evening will not be very little, makes camera on daytime
Relatively clear image can be received with evening.
The utility model is further arranged to: the fixing shell is fixedly connected on one end far from first lens
Stop collar, the stop collar offer light passing inclined-plane far from one end of the fixing shell.
By using above-mentioned technical proposal, stop collar and diaphragm simultaneously limit the position of the third lens and the 4th lens
It is fixed；Since light is being in divergent state after the 4th lens, light passing inclined-plane makes light be not easy to be blocked.
The utility model is further arranged to: first lens, the second lens, the third lens and the 4th lens are formed
Effective focal length have 4.0mm.
By using above-mentioned technical proposal, effective focal length 4.0mm keeps the light by the 4th lens relatively clear
Image is incident upon at the imaging sensor of video camera.
The utility model is further arranged to: first lens, the second lens, the third lens and the 4th lens are formed
Chief ray angle less than 14 °.
By using above-mentioned technical proposal, chief ray angle is less than 14 °, and incident small smaller, transmitted light is more, to make
It is relatively clear to obtain last imaging.
The utility model is further arranged to: the radius of curvature of first lens two sides be respectively 17.96mm and
2.99mm；The radius of curvature of second lens two sides is respectively 13.87mm and 7.5mm；The curvature of the third lens two sides
Radius is respectively 5.85mm and 4.07mm；The radius of curvature of the 4th lens two sides is respectively 4.76mm and 9.97mm.
By using above-mentioned technical proposal, the radius of curvature value of the first lens two sides enables the first lens through more
Light and light is dissipated；The radius of curvature value of second lens two sides enables the second lens preferably to carry out light
Convergence；The radius of curvature value of the third lens two sides makes the third lens poor compared to the second lens aggregate capabilities；4th lens
The radius of curvature value of two sides makes the 4th lens have weaker dissipating effect, so that the image that video camera receives is relatively clear.
In conclusion the utility model has the following beneficial effects:
1, pass through the first lens of setting, the second lens, the third lens and the 4th lens, the first lens, the second lens, third
Lens and the 4th lens, which are formed by effective focal length, 4.0mm, the first lens, the second lens, the third lens and the 4th lens institute
The chief ray angle of formation is less than 14 °, so that camera lens transmitted light increases, while light can be projected preferably to video camera
Imaging sensor at so that last imaging is relatively clear.
Detailed description of the invention
Fig. 1 is the external structure diagrammatic cross-section of the utility model.
Appended drawing reference: 1, fixing shell；2, the first lens；3, the second lens；4, the third lens；5, the 4th lens；6, every
Circle；61, holding tank；7, diaphragm；8, stop collar；81, light passing inclined-plane.
Specific embodiment
The utility model is described further referring to attached drawing.
As shown in Figure 1, a kind of safety monitoring camera lens, including fixing shell 1, in fixing shell 1 successively along the path of light
It is provided with the first lens 2, the second lens 3, the third lens 4 and the 4th lens 5.First lens 2 are concavees lens, and the first lens 2 are solid
Surely it being connected in fixing shell 1, the first lens 2 are provided projectingly far from the side of the second lens 3 and subsequent corrosion is 17.96mm,
First lens 2 are towards the recess setting of the side of the second lens 3 and subsequent corrosion is 2.99mm, and the first lens 2 and the second lens 3 are adopted
It is made of glass.
Spacer ring 6 is provided between first lens 2 and the second lens 3, spacer ring 6 is fixedly connected in fixing shell 1, spacer ring 6
One end and first lens 2 contradict, the other end and the second lens 3 conflict.Second lens 3 are convex lens, and the second lens 3 are solid
Surely it is connected in fixing shell 1, radius of curvature of second lens 3 close to the side of spacer ring 6 is 13.87mm, and the second lens 3 are separate
The radius of curvature of the side of spacer ring 6 is 7.5mm.One end of spacer ring 6 towards the second lens 3 offers holding tank 61, the second lens 3
Side far from the third lens 4 is located in holding tank 61.Diaphragm 7 is provided between second lens 3 and the third lens 4, diaphragm 7 is solid
Surely it is connected and fixed on shell 1, the F value of diaphragm 7 is 2.2, and the both ends of diaphragm 7 are contradicted with the second lens 3 and the third lens 4 respectively.
The third lens 4 are fixedly connected in fixing shell 1, and the third lens 4 are convex lens, and the third lens 4 are saturating towards second
The radius of curvature of the side of mirror 3 is 5.85mm, and the radius of curvature of the third lens 4 towards the side of the 4th lens 5 is 4.07mm.The
Four lens 5 are fixedly connected in fixing shell 1, and the 4th lens 5 are contradicted close to the side of the third lens 4 and the third lens 4, and the 4th
Lens 5 towards the third lens 4 side recess setting and radius of curvature be 4.76mm, the 4th lens 5 far from the third lens 4 one
Side protrusion is arranged and radius of curvature is 9.97mm.Fixing shell 1 is fixedly connected with restraining position ring block 8 far from one end of the first lens 2, limit
Position ring 8 offers light passing inclined-plane 81, side and fourth lens of the stop collar 8 towards the 4th lens 5 far from the side of the 4th lens 5
5 contradict.The third lens 4 and the 4th lens 5 are made of high temperature resistant polymethyl methacrylate.
First lens 2, the second lens 3, the third lens 4 and the 4th lens 5 are formed by effective focal length and have 4.0mm, and first
Lens 2, the second lens 3, the third lens 4 and the 4th lens 5 are formed by chief ray angle less than 14 °, the first lens 2, second
The image circle diameter that lens 3, the third lens 4 and the 4th lens 5 are constituted is 6.85mm.
In conclusion light is dissipating after convex lens, then converged by the second lens 3 and the third lens 4,
It is dissipated finally by the 4th lens 5；Setting is protruded in the side of first lens 2, and the first lens 2 are converged more
Light；The convergence of second lens 3 and the third lens 4 is so that light is more concentrated, and the diverging of the 4th lens 5 is so that light is more equal
Even exposes at the imaging sensor of video camera.First lens 2, the second lens 3, the third lens 4 and the 4th lens 5 are formed
Effective focal length have 4.0mm, the first lens 2, the second lens 3, the third lens 4 and the 4th lens 5 are formed by chief ray angle
Less than 14 °, so that camera lens transmitted light increases.First lens 2 and the second lens 3 are made of glass, the third lens 4 and the
Four lens 5 are made of high temperature resistant polymethyl methacrylate, and glass and high temperature resistant polymethyl methacrylate can bear higher
Temperature, safety monitoring camera lens is worked at a higher temperature.Both the third lens 4 and the 4th lens 5 are tight
Patch, the third lens 4 are convex lens, and the 4th lens 5 are recessed close to 4 side of the third lens, so as to form achromatic effect, so that
Safety monitoring camera lens is less prone to purple boundary phenomenon.
The above is only the preferred embodiment of the utility model, and the protection scope of the utility model is not limited merely to
Above-described embodiment, technical solution belonging to the idea of the present invention belong to the protection scope of the utility model.It should refer to
Out, for those skilled in the art, it is without departing from the principle of the utility model it is several improvement and
Retouching, these improvements and modifications also should be regarded as the protection scope of the utility model.
Claims (8)
1. a kind of safety monitoring camera lens, it is characterized in that: including fixing shell (1), the fixing shell (1) is interior along the path of light
It is disposed with the first lens (2), the second lens (3), the third lens (4) and the 4th lens (5)；First lens (2) are
Concavees lens, first lens (2) protrude setting far from the side of second lens (3), and first lens (2) are close to institute
State the side recess setting of the second lens (3)；Second lens (3) and the third lens (4) are convex lens；Described 4th thoroughly
Mirror (5) is concavees lens, and the 4th lens (5) are recessed towards the side of the third lens (4) and are arranged, the 4th lens
(5) setting is protruded in the side far from the third lens (4).
2. a kind of safety monitoring camera lens according to claim 1, it is characterized in that: first lens (2) and described second
It is provided between lens (3) spacer ring (6), one end of the spacer ring (6) towards second lens (3) is offered for described second
The holding tank (61) that lens (3) accommodate.
3. a kind of safety monitoring camera lens according to claim 2, it is characterized in that: second lens (3) and the third
Diaphragm (7) are provided between lens (4).
4. a kind of safety monitoring camera lens according to claim 3, it is characterized in that: the F value of the diaphragm (7) is 2.2, it is described
The image circle diameter that first lens (2), the second lens (3), the third lens (4) and the 4th lens (5) are constituted is 6.85mm.
5. a kind of safety monitoring camera lens according to claim 2, it is characterized in that: the fixing shell (1) is far from described the
It is fixedly connected on one end of one lens (2) restraining position ring block (8), the stop collar (8) is opened far from the one end of the fixing shell (1)
Equipped with light passing inclined-plane (81).
6. a kind of safety monitoring camera lens according to claim 1, it is characterized in that: first lens (2), the second lens
(3), the third lens (4) and the 4th lens (5) are formed by effective focal length and have 4.0mm.
7. a kind of safety monitoring camera lens according to claim 6, it is characterized in that: first lens (2), the second lens
(3), the third lens (4) and the 4th lens (5) are formed by chief ray angle less than 14 °.
8. a kind of safety monitoring camera lens according to claim 7, it is characterized in that: the curvature of first lens (2) two sides
Radius is respectively 17.96mm and 2.99mm；The radius of curvature of second lens (3) two sides is respectively 13.87mm and 7.5mm；
The radius of curvature of the third lens (4) two sides is respectively 5.85mm and 4.07mm；The curvature of 4th lens (5) two sides half
Diameter is respectively 4.76mm and 9.97mm.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201821133157.1U CN208459663U (en) | 2018-07-17 | 2018-07-17 | A kind of safety monitoring camera lens |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201821133157.1U CN208459663U (en) | 2018-07-17 | 2018-07-17 | A kind of safety monitoring camera lens |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN208459663U true CN208459663U (en) | 2019-02-01 |
Family
ID=65180421
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201821133157.1U Active CN208459663U (en) | 2018-07-17 | 2018-07-17 | A kind of safety monitoring camera lens |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN208459663U (en) |
-
2018
- 2018-07-17 CN CN201821133157.1U patent/CN208459663U/en active Active
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