CN210323532U - High-definition fisheye lens - Google Patents
High-definition fisheye lens Download PDFInfo
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- CN210323532U CN210323532U CN201921363731.7U CN201921363731U CN210323532U CN 210323532 U CN210323532 U CN 210323532U CN 201921363731 U CN201921363731 U CN 201921363731U CN 210323532 U CN210323532 U CN 210323532U
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Abstract
The utility model provides a high-definition fisheye lens, which comprises a lens cone, a front gland, a rear gland, a first lens group arranged between the lens cone and the front gland, and a second lens group arranged between the lens cone and the rear gland; the first lens group is sequentially provided with a first concave lens, a second concave lens, a third concave lens and a fourth convex lens; the second lens group is sequentially provided with a fifth concave lens, a sixth convex lens, a seventh convex lens, an eighth convex lens, a ninth concave lens and an optical filter; the fifth concave lens and the sixth convex lens are glued together, and the eighth convex lens and the ninth concave lens are glued together; a first circular groove, a second circular groove, a third circular groove and a fourth circular groove are formed in one object space side of the lens barrel; a fifth circular groove, a seventh circular groove and a ninth circular groove are formed in the image side of the lens barrel; the utility model discloses can improve the adaptability of fisheye camera lens in high temperature or low temperature occasion, and can effectively reduce the size of whole high definition fisheye camera lens.
Description
Technical Field
The utility model relates to a camera lens design field, in particular to high definition fisheye lens that high resolution, temperature stability are strong and small.
Background
In recent years, since a fisheye lens has an advantage of an ultra-large field angle, the fisheye lens is widely applied to the fields of VR (virtual reality) cameras, unmanned aerial vehicle cameras, security surveillance cameras, panoramic cameras, and the like, and particularly, the application to the panoramic cameras has almost developed explosively in recent years. This undoubtedly stimulates a great demand for fish-eye lenses.
Compared with the common camera, the novel panoramic camera has an important judgment standard, namely the definition of the camera, which directly influences the resolution of the shot video, besides meeting the basic factors of accurate color restoration, low brightness and no noise. At present, a panoramic camera with better definition applied in professional grade can be provided with more concave lens and convex lens combinations, so that the size of the whole fisheye lens is larger.
Meanwhile, the lens barrel structure of the existing fisheye lens has poor fixing stability to the lens, so that the fisheye lens is difficult to adapt to high-temperature or low-temperature occasions.
Therefore, it is desirable to provide a high-definition fisheye lens to solve the above-mentioned technical problems.
SUMMERY OF THE UTILITY MODEL
The utility model provides a high definition fisheye lens that high resolution, temperature stability are strong and small to solve the great and relatively poor technical problem of temperature stability of volume of current high definition fisheye lens.
In order to solve the technical problem, the utility model adopts the technical scheme that:
a high-definition fisheye lens comprises a lens barrel, a front gland, a rear gland, a first lens group arranged between the lens barrel and the front gland, and a second lens group arranged between the lens barrel and the rear gland;
the first lens group is provided with a first concave lens, a second concave lens, a third concave lens and a fourth convex lens in sequence from an object side to an image side;
the second lens group is sequentially provided with a fifth concave lens, a sixth convex lens, a seventh convex lens, an eighth convex lens, a ninth concave lens and an optical filter in the direction from the object space to the image space; wherein the fifth concave lens and the sixth convex lens are cemented together, and the eighth convex lens and the ninth concave lens are cemented together;
a first annular groove for fixing the first concave lens, a second annular groove for fixing the second concave lens, a third annular groove for fixing the third concave lens and a fourth annular groove for fixing the fourth convex lens are formed in one object space side of the lens barrel;
and a fifth annular groove for fixing the fifth concave lens, a seventh annular groove for fixing the seventh convex lens and a ninth annular groove for fixing the ninth concave lens are formed in one image side of the lens barrel.
High definition flake camera lens in, preceding gland is provided with the gland internal thread, the lens cone is provided with the object space external screw thread in object space one end, through the gland internal thread with the thread cooperation locking of object space external screw thread is fixed first battery of lenses.
High definition flake camera lens in, back clamping ring is provided with the clamping ring external screw thread, the lens cone is provided with the image space internal thread in image space one end, through the clamping ring external screw thread and the internal screw thread of image space cooperation locking is fixed the second battery of lenses.
High definition fisheye lens in, high definition fisheye lens is still including the base that is used for setting up the module of making a video recording, the base with the one end that the lens cone is connected is provided with the base internal thread, the lens cone is provided with the image side external screw thread in image side one end, the base internal thread of base with the image side external screw thread cooperation of lens cone is connected.
In the high definition fisheye lens of the present invention, the middle portion of the lens barrel is provided with a separation portion for keeping the distance between the fourth convex lens and the fifth concave lens.
In the high definition fisheye lens of the present invention, the isolation portion is provided with a protrusion for blocking light at the edge of the lens.
In the high definition fisheye lens of the present invention, the fifth concave lens and the seventh convex lens are disposed therebetween for ensuring the sixth convex lens and the seventh convex lens are disposed at a distance from each other by a first spacing ring.
In the high definition fisheye lens of the present invention, the first spacer ring and the contact area of the seventh convex lens are located on the boundary of the object space working area of the seventh convex lens.
In the high definition fisheye lens of the present invention, the seventh convex lens and the eighth convex lens are provided with a second spacing ring therebetween for ensuring the distance between the seventh convex lens and the eighth convex lens.
In the high definition fisheye lens of the present invention, the second spacer ring is located on the boundary of the contact area of the seventh convex lens at the edge of the image space working area of the seventh convex lens.
The utility model discloses compare in prior art, its beneficial effect is: the structure of the first lens group, the second lens group, the lens cone, the front gland and the rear compression ring in the high-definition fisheye lens of the utility model can better ensure the structural stability of the high-definition fisheye lens, thereby improving the adaptability of the fisheye lens in high-temperature or low-temperature occasions; simultaneously the utility model discloses a compact structure of first battery of lens and second battery of lens can effectively reduce the size of whole high definition fisheye camera lens. Thereby the effectual relatively poor and great technical problem of size of stability that has solved current fisheye lens.
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 embodiments are briefly introduced below, and the drawings in the following description are only corresponding drawings of some embodiments of the present invention.
Fig. 1 is a three-dimensional structure diagram of an embodiment of the high-definition fisheye lens of the present invention;
fig. 2 is a sectional view of the high definition fisheye lens according to an embodiment of the present invention;
fig. 3 is an exploded view of the high definition fisheye lens according to an embodiment of the present invention;
fig. 4 is a schematic diagram illustrating the image resolution of the high-definition fisheye lens of the present invention;
fig. 5 is a schematic diagram illustrating color expression of the high-definition fisheye lens of the present invention;
description of the drawings: the high-definition fisheye lens comprises a high-definition fisheye lens 10, a lens barrel 11, a first annular groove 111, a second annular groove 112, a third annular groove 113, a fourth annular groove 114, a separating part 115, a protrusion 1151, a fifth annular groove 116, a seventh annular groove 117, a ninth annular groove 118, a front gland 12, a rear press ring 13, a first lens group 14, a first concave lens 141, a second concave lens 142, a third concave lens 143, a fourth convex lens 144, a second lens group 15, a fifth concave lens 151, a sixth convex lens 152, a seventh convex lens 153, an eighth convex lens 154, a ninth concave lens 155, an optical filter 156, a first spacing ring 157, a second spacing ring 158 and a base 16.
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 the skilled in the art without creative work belong to the protection scope of the present invention.
Referring to fig. 1-3, fig. 1 is a three-dimensional structure diagram of an embodiment of a high-definition fisheye lens of the present invention; fig. 2 is a sectional view of the high definition fisheye lens according to an embodiment of the present invention; fig. 3 is an exploded view of the high definition fisheye lens according to an embodiment of the present invention.
The high-definition fisheye lens 10 of the embodiment includes a lens barrel 11, a front cover 12, a rear cover 13, a first lens group 14, and a second lens group 15.
The first lens group 14 is provided between the lens barrel 11 and the front cover 12, and the first lens group 14 is formed by arranging a first concave lens 141, a second concave lens 142, a third concave lens 143, and a fourth convex lens 144 in order from an object side (object position) to an image side (image forming position) so that incident light is bent in a stepwise manner in parallel with the optical axis and guided to the second lens group. The first concave lens 141, the second concave lens 142, and the third concave lens 143 are concave meniscus lenses having convex surfaces on the object side and concave surfaces on the image side, and the fourth convex lens 144 is a biconvex lens having convex surfaces on the object side and the image side.
Be provided with the gland internal thread on the preceding gland 12, lens cone 11 is provided with the object space external screw thread in object space one end, and the screw tooth cooperation locking through gland internal thread one object space external screw thread fixes first lens group.
The second lens group 15 is disposed between the barrel 11 and the rear press ring 13. In the second lens group 15, a fifth concave lens 151, a sixth convex lens 152, a seventh convex lens 153, an eighth convex lens 154, a ninth concave lens 155, and an optical filter 156 are arranged in this order from the object side to the image side. For guiding the light incident from the first lens group 14 to an imaging surface of the camera module at a set incident angle. The fifth concave lens 151 and the ninth concave lens 155 are biconcave lenses having concave surfaces on both the object side and the image side, and the sixth convex lens 152, the seventh convex lens 153, and the eighth convex lens 154 are biconvex lenses having convex surfaces on both the object side and the image side. The light emitting surface of the fifth concave lens 151 and the light incident surface of the sixth convex lens 152 are bonded together, and the light emitting surface of the eighth convex lens 154 and the light incident surface of the ninth concave lens 155 are bonded together.
The rear pressing ring 13 is provided with a pressing ring external thread, the lens barrel 11 is provided with an image space internal thread at one end of an image space, and the second lens group 15 is locked and fixed through the pressing ring external thread and the image space internal thread in a screw tooth matching mode.
High definition flake camera lens 10 is still including the base 16 that is used for setting up the module of making a video recording, and the one end that base 16 and lens cone 11 are connected is provided with the base internal thread, and lens cone 11 is provided with the image side external screw thread in image side one end, and the base internal thread of base 16 is connected with the image side external screw thread cooperation of lens cone 11.
The first lens group 14 and the second lens group 15 can be stably fixed through the matching structure between the lens barrel 11, the front gland 12 and the rear press ring 13, and the influence of temperature change on the fisheye lens in high-temperature or low-temperature occasions can be well eliminated. Specifically, the lens barrel 11 is provided with a first annular groove 111 for fixing the first concave lens 141, a second annular groove 112 for fixing the second concave lens 142, a third annular groove 113 for fixing the third concave lens 143, and a fourth annular groove 114 for fixing the fourth convex lens 144 on the object side. The aperture of the first circular groove 111 matches the maximum diameter of the first concave lens 141, the aperture of the second circular groove 112 matches the maximum diameter of the second concave lens 142, the aperture of the third circular groove 113 matches the maximum diameter of the third concave lens 143, and the aperture of the fourth circular groove 114 matches the maximum diameter of the fourth convex lens 144. The diameters of the fourth circular groove 114, the third circular groove 113, the second circular groove 112, and the first circular groove 111 become smaller in this order.
Therefore, the first concave lens 141 is fixed by the front cover 12, the edge of the second concave lens 142, and the first annular groove 111, the second concave lens 142 is fixed by the edge of the first concave lens 141, the third concave lens 143, and the second annular groove 112, the third concave lens 143 is fixed by the edge of the second concave lens 142, the fourth convex lens 144, and the third annular groove 113, and the fourth convex lens 144 is fixed by the third concave lens 143, the partition 115 of the barrel 11, and the fourth annular groove 114.
The lens barrel 11 is provided on the image side with a fifth annular groove 116 for fixing a fifth concave lens 151, a seventh annular groove 117 for fixing a seventh convex lens 153, and a ninth annular groove 118 for fixing a ninth concave lens 155. The fifth circular groove 116 matches the maximum diameter of the fifth concave lens 151, the seventh circular groove 117 matches the maximum diameter of the seventh convex lens 153, and the ninth circular groove 118 matches the maximum diameter of the ninth concave lens 155. The diameters of the fifth circular groove 116, the seventh circular groove 117, and the ninth circular groove 118 increase in this order.
A first spacer ring 157 for securing a distance between the sixth convex lens 152 and the seventh convex lens 153 is disposed between the fifth concave lens 151 and the seventh convex lens 153, and a second spacer ring 158 for securing a distance between the seventh convex lens 153 and the eighth convex lens 154 is disposed between the seventh convex lens 153 and the eighth convex lens 154.
Therefore, the fifth concave lens 151 is fixed by the spacer 115, the first spacer ring 157, and the fifth annular groove 116 of the lens barrel 11, the seventh convex lens 153 is fixed by the first spacer ring 157, the second spacer ring 158, and the seventh annular groove 117, and the ninth concave lens 155 is fixed by the second spacer ring 158, the rear press ring 13, and the ninth annular groove 118.
The middle portion of the lens barrel 11 is provided with a spacer 115 for maintaining a distance between the fourth convex lens 144 and the fifth concave lens 151.
The utility model discloses a high definition fisheye lens 10 uses, when object formation of image light (specific light path please see lines a and lines b in fig. 2) kicked into first lens battery 14 from the A direction, first lens battery 14 made the incident light buckle with optical axis parallel direction stepwisely to second lens battery 15 is led to the isolation part 115 through lens cone 11.
The isolation part 115 of the lens barrel 11 is provided with a projection 1151 for blocking light at the edge of the lens, so that an imaging deformation area of an imaging edge area can be eliminated well.
Then, the light emitted from the first lens group 14 enters the second lens group 15, and the second lens group 15 guides the light incident from the first lens group 14 to an imaging surface of the camera module at a set incident angle. The boundary of the contact area of the first spacing ring 157 and the seventh convex lens 153 is located at the edge of the object side working area of the seventh convex lens 153, and the imaging quality outside the object side working area of the seventh convex lens 153 is poor, so that part of light rays incident to the edge of the seventh convex lens 153 are blocked by the first spacing ring 157. The boundary of the contact area between the second spacing ring 158 and the seventh convex lens 153 is located at the edge of the image-side working area of the seventh convex lens 153, and the imaging quality outside the image-side working area of the seventh convex lens 153 is poor, so that the edge light of the seventh convex lens 153 is partially blocked by the second spacing ring 158.
Finally, the emergent light of the second lens group 15 is incident on the imaging surface of the camera module at a set incident angle, so that the imaging process of the high-definition fisheye lens 10 of the embodiment is completed.
The utility model discloses a burnt variable quantity is shown as table 1 behind the optics of high definition fisheye camera lens under different temperatures. The optical back focus variation amount of the high-definition fisheye lens between high temperature and low temperature is small, so that the high-definition fisheye lens is good in stability. And the line pair of 436mm at 50 cm can be distinguished from the large-field-angle position (as shown in fig. 4), and the high resolution of the shot picture can be ensured. In addition the utility model discloses a high definition fisheye lens is under low colour temperature environment, and is stronger to the expressive force and the resolution power of big visual field angle position to the colour (the differentiation degree of the different colour objects of big visual field angle department shown in figure 5 is stronger).
The structure of the first lens group, the second lens group, the lens cone, the front gland and the rear compression ring in the high-definition fisheye lens of the utility model can better ensure the structural stability of the high-definition fisheye lens, thereby improving the adaptability of the fisheye lens in high-temperature or low-temperature occasions; simultaneously the utility model discloses a compact structure of first battery of lens and second battery of lens can effectively reduce the size of whole high definition fisheye camera lens. Thereby the effectual relatively poor and great technical problem of size of stability that has solved current fisheye lens.
TABLE 1
In summary, although the present invention has been described with reference to the preferred embodiments, the above-described preferred embodiments are not intended to limit the present invention, and those skilled in the art can make various changes and modifications without departing from the spirit and scope of the present invention, so that the scope of the present invention shall be determined by the scope of the appended claims.
Claims (10)
1. A high-definition fisheye lens is characterized by comprising a lens barrel, a front gland, a rear gland, a first lens group arranged between the lens barrel and the front gland, and a second lens group arranged between the lens barrel and the rear gland;
the first lens group is provided with a first concave lens, a second concave lens, a third concave lens and a fourth convex lens in sequence from an object side to an image side;
the second lens group is sequentially provided with a fifth concave lens, a sixth convex lens, a seventh convex lens, an eighth convex lens, a ninth concave lens and an optical filter in the direction from the object space to the image space; wherein the fifth concave lens and the sixth convex lens are cemented together, and the eighth convex lens and the ninth concave lens are cemented together;
a first annular groove for fixing the first concave lens, a second annular groove for fixing the second concave lens, a third annular groove for fixing the third concave lens and a fourth annular groove for fixing the fourth convex lens are formed in one object space side of the lens barrel;
and a fifth annular groove for fixing the fifth concave lens, a seventh annular groove for fixing the seventh convex lens and a ninth annular groove for fixing the ninth concave lens are formed in one image side of the lens barrel.
2. The high definition fisheye lens of claim 1, wherein the front gland is provided with a gland internal thread, the lens barrel is provided with an object side external thread at one end of the object side, and the first lens group is locked and fixed by the gland internal thread and a thread of the object side external thread.
3. The high definition fisheye lens of claim 1, wherein the rear press ring is provided with a press ring external thread, the lens barrel is provided with an image side internal thread at one end of an image side, and the second lens group is locked and fixed by the press ring external thread and the image side internal thread.
4. The high-definition fisheye lens of claim 1 further comprising a base for arranging a camera module, wherein an inner base thread is arranged at one end of the base connected with the lens barrel, an outer image-side thread is arranged at one image-side end of the lens barrel, and the inner base thread of the base is in fit connection with the outer image-side thread of the lens barrel.
5. The high definition fisheye lens of claim 1, wherein a spacer for maintaining a distance between the fourth convex lens and the fifth concave lens is provided in a middle portion of the lens barrel.
6. The high definition fisheye lens of claim 5 wherein the spacer is provided with protrusions for blocking light at the edge of the lens.
7. The high definition fish-eye lens as claimed in claim 1, wherein a first spacer ring for securing a distance between the sixth convex lens and the seventh convex lens is disposed between the fifth concave lens and the seventh convex lens.
8. The high definition fisheye lens of claim 7 wherein the boundary of the contact area of the first spacer ring and the seventh convex lens is located at the edge of the object working area of the seventh convex lens.
9. The high definition fisheye lens of claim 1, wherein a second spacer ring for ensuring a distance between the seventh convex lens and the eighth convex lens is arranged between the seventh convex lens and the eighth convex lens.
10. The high definition fisheye lens of claim 9, wherein the boundary of the contact area of the second spacer ring and the seventh convex lens is located at the edge of the image working area of the seventh convex lens.
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201921363731.7U CN210323532U (en) | 2019-08-21 | 2019-08-21 | High-definition fisheye lens |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201921363731.7U CN210323532U (en) | 2019-08-21 | 2019-08-21 | High-definition fisheye lens |
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| CN210323532U true CN210323532U (en) | 2020-04-14 |
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| CN201921363731.7U Active CN210323532U (en) | 2019-08-21 | 2019-08-21 | High-definition fisheye lens |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN112558279A (en) * | 2020-12-18 | 2021-03-26 | 湖北云泰时代光学仪器有限公司 | High-definition wide-angle lens |
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2019
- 2019-08-21 CN CN201921363731.7U patent/CN210323532U/en active Active
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN112558279A (en) * | 2020-12-18 | 2021-03-26 | 湖北云泰时代光学仪器有限公司 | High-definition wide-angle lens |
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