CN211402910U - Fog-penetrating zoom lens - Google Patents
Fog-penetrating zoom lens Download PDFInfo
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- CN211402910U CN211402910U CN202020249010.XU CN202020249010U CN211402910U CN 211402910 U CN211402910 U CN 211402910U CN 202020249010 U CN202020249010 U CN 202020249010U CN 211402910 U CN211402910 U CN 211402910U
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Abstract
The utility model provides a fog-penetrating zoom lens, including focusing lens group, first moving mirror group, second moving mirror group, third moving mirror group, fourth moving mirror group and filtering mirror group. The focusing lens group, the first moving lens group, the second moving lens group, the third moving lens group, the fourth moving lens group and the filter lens group are sequentially arranged along the light incidence direction. In the zooming process of the four moving lens groups, the multiple elements perform curvilinear motion in an optimal mode according to a certain track, so that the focal length is continuously zoomed, aberration is compensated, the stability of an image surface is ensured, and clear imaging in the whole process is realized. The zoom lens has the advantages that the full length of the lens is shorter, the overall size is smaller, and the miniaturization of the high-magnification zoom lens is easy to realize while the maximum zoom effect is achieved. The filter group realizes the functions of color imaging from a visible light band to black and white imaging from a near infrared band by switching the optical filters, and fog penetration is realized.
Description
Technical Field
The utility model belongs to the technical field of optical instrument and specifically relates to indicate a fog-penetrating zoom lens.
Background
In remote monitoring, the effective observation distance of a short-focus camera lens often cannot meet the requirements of users. In visible light environments such as fog, dust, smoke and the like, the common long-focus lens can only obtain a fuzzy picture when imaging. The imaging resolution of the long-focus zoom lens with the fog penetration function in the current market is generally low. With the increasing requirements of users on imaging quality, the current zoom lens with low resolution and low fog penetration capability cannot meet the requirements of users.
SUMMERY OF THE UTILITY MODEL
The utility model discloses the technical problem that will solve is: provides a zoom lens with higher resolution, stronger fog penetration and larger multiplying power
In order to solve the technical problem, the utility model discloses a technical scheme be: the zoom lens comprises a focusing lens group, a first moving lens group, a second moving lens group, a third moving lens group, a fourth moving lens group and a filtering lens group, wherein the focusing lens group, the first moving lens group, the second moving lens group, the third moving lens group, the fourth moving lens group and the filtering lens group are sequentially arranged along the incident direction of light;
the optical filter group comprises a first convex-concave lens, a second convex-concave lens, a plano-convex lens and an optical filter, wherein the first convex-concave lens, the second convex-concave lens, the plano-convex lens and the optical filter are sequentially arranged along the incident direction of light rays.
Furthermore, the focusing mirror group comprises a first biconvex lens, a first concave flat lens and a first convex flat lens, wherein the first biconvex lens, the first concave flat lens and the first convex flat lens are sequentially arranged along the light incidence direction, and the first biconvex lens and the first concave flat lens form a first cemented lens.
Further, the first moving lens group includes a second biconvex lens, a first biconcave lens, a third convex-concave lens and a second biconcave lens, which are sequentially arranged along the light incidence direction, and the second biconvex lens and the first biconcave lens constitute a second cemented lens.
Further, the second moving mirror group includes a third lenticular lens.
Further, the third moving lens group includes a fourth convex-concave lens, a fifth convex-concave lens, and a second concave-flat lens, which are sequentially arranged along the light incident direction.
Furthermore, the fourth moving mirror group comprises a third biconcave lens and a second convex flat lens, and the third biconcave lens and the second convex flat lens are sequentially arranged along the light incidence direction.
Further, the first convex-concave lens, the second convex-concave lens, the third convex-concave lens, the fourth convex-concave lens, the fifth convex-concave lens, the plano-convex lens, the first biconcave lens, the second biconcave lens, the third biconcave lens, the first concave plano lens, the second concave plano lens, the first convex plano lens, the second convex plano lens, the first biconcave lens, the second biconcave lens, and the third biconcave lens are all spherical glass lenses.
Further, the focal length of the zoom lens is 15mm-750mm, and the F number is 2.7-7.5.
Further, the maximum clear aperture of the zoom lens is phi 110mm, the maximum optical cylinder length is 420mm, and the total optical system length is 448 mm.
The beneficial effects of the utility model reside in that: the utility model provides a high-resolution passes through zoom of big multiplying power of fog by force, first moving mirror group, second moving mirror group, third moving mirror group and fourth moving mirror group are organized at the motion in-process that zooms, and the multicomponent is according to certain orbit to make curvilinear motion with the optimal mode, realizes that the focus zooms in succession to compensate and guarantee the stability of image planes to image difference, realize whole clear formation of image. The zoom lens has the advantages that the full length of the lens is shorter, the overall size is smaller, and the miniaturization of the high-magnification zoom lens is easy to realize while the maximum zoom effect is achieved. The filter group realizes the functions of color imaging from a visible light band to black and white imaging from a near infrared band by switching the optical filters, and fog penetration is realized.
Drawings
The specific structure of the present invention is detailed below with reference to the accompanying drawings:
FIG. 1 is a diagram of the structure of the optical system of the present invention;
FIG. 2 is a graph of the visible band short-focus MTF of the optical system of the present invention;
FIG. 3 is a graph of the MTF curve of the visible light band middle focus of the optical system of the present invention;
FIG. 4 is a graph of the visible light band long focus MTF curve of the optical system of the present invention;
FIG. 5 is a graph of the near-infrared band short-focus MTF of the optical system of the present invention;
FIG. 6 is a graph of the near infrared band middle focus MTF of the optical system of the present invention;
fig. 7 is a graph of the near-infrared band long-focus MTF of the optical system of the present invention.
Detailed Description
In order to explain technical contents, structural features, and objects and effects of the present invention in detail, the following description is given in conjunction with the embodiments and the accompanying drawings.
Reference will now be made in detail to embodiments of the present invention, examples of which are illustrated in the accompanying drawings, wherein like 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 used for explaining the present invention, and should not be construed as limiting the present invention.
Referring to fig. 1 and 7, the present invention provides a high resolution zoom lens with high power of fog penetration, which comprises a focusing lens set, a first moving lens set, a second moving lens set, a third moving lens set, a fourth moving lens set and a filtering lens set, wherein the focusing lens set, the first moving lens set, the second moving lens set, the third moving lens set, the fourth moving lens set and the filtering lens set are sequentially arranged along the light incident direction. The focusing lens group mainly completes accurate focusing on targets at different distances, the first moving lens group, the second moving lens group, the third moving lens group and the fourth moving lens group move according to respective optimal tracks, continuous zooming with a focal length of 15-750 mm is achieved, aberration is compensated, stability of an image surface is guaranteed, and clear imaging in the whole process is achieved. The filter group realizes the functions of color imaging from a visible light band to black and white imaging from a near infrared band by switching the optical filters, and fog penetration is realized. The functions of higher resolution, stronger fog penetration and higher multiplying power are realized through the combined action of the focusing lens group, the moving lens group and the filtering lens group. Each lens group is described in detail below:
the focusing mirror group comprises a first biconvex lens 11, a first concave flat lens 12 and a first convex flat lens 13, wherein the first biconvex lens 11, the first concave flat lens 12 and the first convex flat lens 13 are sequentially arranged along the light incidence direction. With the concave surface of the first concave-planar lens 12 in front and the convex surface of the first convex-planar lens 13 in front. Both the first biconvex lens 11 and the first concave-flat lens 12 constitute a cemented lens. The focusing mirror group mainly completes accurate focusing on targets at different distances.
The first moving lens group includes a second biconvex lens 21, a first biconcave lens 22, a third biconcave lens 23, and a second biconcave lens 24. The second biconvex lens 21, the first biconcave lens 22, the third biconcave lens 23 and the second biconcave lens 24 are arranged in sequence along the direction of light incidence, with the convex surface of the third biconcave lens 23 in front. Both the second biconvex lens 21 and the first biconcave lens 22 constitute a cemented lens in combination. And the zoom lens moves according to a specific optimal curve, so that the magnification is realized, meanwhile, the stability of an image surface is kept, and the continuous zooming is realized.
The second moving lens group only has one third biconvex lens 31, and the third biconvex lens 31 moves in cooperation with other moving lens groups and moves according to a specific optimal curve, so that magnification is realized, the stability of an image surface is kept, and continuous zooming is realized.
The third moving lens group includes a fourth convex-concave lens 41, a fifth convex-concave lens 42, and a second concave-flat lens 43, and the fourth convex-concave lens 41, the fifth convex-concave lens 42, and the second concave-flat lens 43 are sequentially arranged in the light incidence direction. With the convex surface of the fourth convex-concave lens 41 in front, the convex surface of the fifth convex-concave lens 42 in front, and the concave surface of the second concave-flat lens 43 in front. The third moving lens group moves in coordination with other moving lens groups and moves according to a specific optimal curve, magnification is achieved, meanwhile, stability of an image surface is kept, and continuous zooming is achieved.
The fourth moving lens group comprises a third biconcave lens 51 and a second convex-flat lens 52, wherein the third biconcave lens 51 and the second convex-flat lens 52 are sequentially arranged along the light incidence direction, and the convex surface of the second convex-flat lens 52 is in front. The fourth moving lens group moves in coordination with other moving lens groups and moves according to a specific optimal curve, magnification is achieved, meanwhile, stability of an image surface is kept, and continuous zooming is achieved.
The optical filter group comprises a first convex-concave lens 61, a second convex-concave lens 62, a plano-convex lens 63 and an optical filter 64, wherein the first convex-concave lens 61, the second convex-concave lens 62, the plano-convex lens 63 and the optical filter 64 are sequentially arranged along the incident direction of light rays, the convex surface of the first convex-concave lens 61 is in front, the convex surface of the second convex-concave lens 62 is in front, and the plane of the plano-convex lens 63 is in front. The filter group realizes the functions of color imaging from a visible light band to black and white imaging from a near infrared band by switching the optical filters, and fog penetration is realized.
The utility model provides a high-resolution passes through zoom of big multiplying power of fog by force, through the combined action that focusing mirror group, moving mirror group and light filtering mirror group were organized to realize resolving higher, the fog-penetrating ability is stronger, the great function of multiplying power. The focal length of an optical system consisting of the focusing lens group, the first moving lens group, the second moving lens group, the third moving lens group, the fourth moving lens group and the filter lens group is 15mm-750mm, the F number is 2.7-7.5, the maximum clear aperture is phi 110mm, the maximum optical cylinder length is 420mm, and the total length of the optical system is 448 mm. Meanwhile, the target surface applicable to the structure of the utility model is 1/1.7 inch, 1/1.8 inch, 1/1.9 inch and 1/2.0 inch, the central resolution of the visible light wave band is better than 500 ten thousand pixels, the distortion is less than 4 percent, and the applicable spectral line range is 400nm-1100 nm. When the color imaging is switched to the black-and-white fog-penetrating imaging, no lens movement or compensation is needed, the image surface is still strictly kept in focus alignment, and the imaging is clear.
From the above description, the beneficial effects of the present invention are: the utility model provides a high-resolution passes through zoom of big multiplying power of fog by force, first moving mirror group, second moving mirror group, third moving mirror group and fourth moving mirror group are organized at the motion in-process that zooms, and the multicomponent is according to certain orbit to make curvilinear motion with the optimal mode, realizes that the focus zooms in succession to compensate and guarantee the stability of image planes to image difference, realize whole clear formation of image. The zoom lens has the advantages that the full length of the lens is shorter, the overall size is smaller, and the miniaturization of the high-magnification zoom lens is easy to realize while the maximum zoom effect is achieved. The filter group realizes the functions of color imaging from a visible light band to black and white imaging from a near infrared band by switching the optical filters, and fog penetration is realized.
Example 1
The utility model provides a high-resolution passes through zoom of big multiplying power of fog by force, in order to obtain better resolving power and pass through the fog ability when using, need select the better lens of luminousness, further increase zoom's performance. In the practical use process, the first convex-concave lens, the second convex-concave lens, the third convex-concave lens, the fourth convex-concave lens, the fifth convex-concave lens, the plano-convex lens, the first biconcave lens, the second biconcave lens, the third biconcave lens, the first concave plano lens, the second concave plano lens, the first convex plano lens, the second convex plano lens, the first biconcave lens, the second biconcave lens and the third biconcave lens all adopt spherical glass lenses. The spherical glass lens has high light transmittance and good thermal stability, and is suitable for the field of security monitoring. Meanwhile, the optical system adopts a global surface structure, and can realize excellent performances of short cylinder length, large multiplying power, wide waveband, high-resolution imaging and the like.
To sum up, the utility model provides a high-resolution passes through zoom of big multiplying power of fog by force, first moving mirror group, second moving mirror group, third moving mirror group and fourth moving mirror group are in the motion process of zooming, and the multicomponent is according to certain orbit to make curvilinear motion with the optimal mode, realizes that the focus zooms in succession to compensate and guarantee the stability of image planes to image difference, realize whole clear formation of image. The zoom lens has the advantages that the full length of the lens is shorter, the overall size is smaller, and the miniaturization of the high-magnification zoom lens is easy to realize while the maximum zoom effect is achieved. The filter group realizes the functions of color imaging from a visible light band to black and white imaging from a near infrared band by switching the optical filters, and fog penetration is realized. The optical system adopts a global surface structure, and can realize excellent performances of short cylinder length, large multiplying power, wide waveband, high-resolution imaging and the like.
The above only is the embodiment of the present invention, not limiting the patent scope of the present invention, all the equivalent structures or equivalent processes that are used in the specification and the attached drawings or directly or indirectly applied to other related technical fields are included in the patent protection scope of the present invention.
Claims (9)
1. A fog-transparent zoom lens is characterized in that: the focusing lens group, the first moving lens group, the second moving lens group, the third moving lens group, the fourth moving lens group and the filtering lens group are sequentially arranged along the light incidence direction;
the optical filter group comprises a first convex-concave lens, a second convex-concave lens, a plano-convex lens and an optical filter, wherein the first convex-concave lens, the second convex-concave lens, the plano-convex lens and the optical filter are sequentially arranged along the incident direction of light rays.
2. The fog-transparent zoom lens of claim 1, wherein: the focusing mirror group comprises a first biconvex lens, a first concave flat lens and a first convex flat lens, wherein the first biconvex lens, the first concave flat lens and the first convex flat lens are sequentially arranged along the light incidence direction, and the first biconvex lens and the first concave flat lens form a first cemented lens.
3. The fog-transparent zoom lens of claim 2, wherein: the first moving lens group comprises a second biconvex lens, a first biconcave lens, a third convex-concave lens and a second biconcave lens, the second biconvex lens, the first biconcave lens, the third convex-concave lens and the second biconcave lens are sequentially arranged along the incident direction of light rays, and the second biconvex lens and the first biconcave lens form a second cemented lens.
4. The fog-transparent zoom lens of claim 3, wherein: the second moving mirror group includes a third biconvex lens.
5. The fog-penetrating zoom lens of claim 4, wherein: the third moving lens group comprises a fourth convex-concave lens, a fifth convex-concave lens and a second concave-flat lens, and the fourth convex-concave lens, the fifth convex-concave lens and the second concave-flat lens are sequentially arranged along the light incidence direction.
6. The fog-penetrating zoom lens of claim 5, wherein: the fourth moving mirror group comprises a third biconcave lens and a second convex flat lens, and the third biconcave lens and the second convex flat lens are sequentially arranged along the light incidence direction.
7. The fog-penetrating zoom lens of claim 6, wherein: the first convex-concave lens, the second convex-concave lens, the third convex-concave lens, the fourth convex-concave lens, the fifth convex-concave lens, the plano-convex lens, the first biconcave lens, the second biconcave lens, the third biconcave lens, the first concave plano lens, the second concave plano lens, the first convex plano lens, the second convex plano lens, the first biconcave lens, the second biconcave lens and the third biconcave lens are all spherical glass lenses.
8. The fog-transparent zoom lens of any one of claims 1 to 7, wherein: the focal length of the zoom lens is 15mm-750mm, and the F number is 2.7-7.5.
9. The fog-transparent zoom lens of any one of claims 1 to 7, wherein: the maximum clear aperture of the zoom lens is phi 110mm, the maximum optical cylinder length is 420mm, and the total length of the optical system is 448 mm.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202020249010.XU CN211402910U (en) | 2020-03-04 | 2020-03-04 | Fog-penetrating zoom lens |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202020249010.XU CN211402910U (en) | 2020-03-04 | 2020-03-04 | Fog-penetrating zoom lens |
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| Publication Number | Publication Date |
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| CN211402910U true CN211402910U (en) | 2020-09-01 |
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| Application Number | Title | Priority Date | Filing Date |
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| CN202020249010.XU Active CN211402910U (en) | 2020-03-04 | 2020-03-04 | Fog-penetrating zoom lens |
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| CN (1) | CN211402910U (en) |
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