CN204392696U - A kind of video camera ball cover - Google Patents
A kind of video camera ball cover Download PDFInfo
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- CN204392696U CN204392696U CN201520045135.XU CN201520045135U CN204392696U CN 204392696 U CN204392696 U CN 204392696U CN 201520045135 U CN201520045135 U CN 201520045135U CN 204392696 U CN204392696 U CN 204392696U
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- land portions
- marginal portion
- ball cover
- sagitta
- video camera
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Abstract
The utility model discloses a kind of video camera ball cover.Described video camera ball cover comprises the land portions (A) being positioned at center and the marginal portion (B) be attached thereto, the inner surface of described marginal portion (B) and outer surface are the surface of revolution, and its axis of rotation is parallel to the axis of rotation of described land portions, described inner surface from described land portions junction on the direction away from described land portions, radius of gyration dullness increases, and the meridian direction of described marginal portion (B) and the focal power in sagitta of arc direction are all identical with described land portions (A).Due to the utility model, the meridian direction of video camera ball cover marginal portion and the focal power in sagitta of arc direction to be arranged to land portions identical, therefore light beam is by after ball cover, the meridian direction of ball cover and the light beam in sagitta of arc direction can focus in same point, eliminating in prior art because the astigmatism that same point produces is failed to focus in meridian direction and sagitta of arc direction, providing advantage for obtaining imaging clearly.
Description
Technical field
The utility model relates to optical imaging field, particularly relates to a kind of video camera ball cover and has its optical imaging system.
Background technology
Transparent ball cover is widely used in optical imaging field, is mainly video camera and camera lens provides mechanical protection, needs to possess excellent optical property, to reduce to minimum by the adverse effect of imaging simultaneously.The translucent cover of safety-security area uses high performance optical plastic manufacture usually.In order to maximally utilise inner space, partially transparent ball cover can make the shape of hemispherical.
This kind of video camera ball cover adopts Shooting Technique manufacture usually.In order to ensure demolding performace, video camera ball cover can not make sphere completely.Usually sphere is processed in the central area of video camera ball cover, fringe region is processed into taper seat.The central area of this type of ball cover, in order to ensure good optical property, inner surface and outer surface all adopt concentric spherical; At the fringe region of ball cover, inner surface and outer surface then all adopt taper seat.Taper seat is connected by tangent mode with land portions, and thickness keeps evenly, thus it is simple to have processing, the feature that core picture element is good.
But the inherent shortcoming of this type of ball cover be taper seat because of meridian direction different with the curvature in sagitta of arc direction, focal power in both direction also produces difference thereupon, light beam is by after ball cover, the light beam in its meridian direction and sagitta of arc direction does not focus in same point, imaging is occurred fuzzy, produce remarkable astigmatism, affect imaging effect, particularly serious in the bigbore optical system of long-focus.Because there is the defect of astigmatism, the application scenario of video camera ball cover is very limited.
Another technology utilizes blow molding process, and manufacturing is the video camera ball cover of concentric spherical type completely.The video camera ball cover of this kind of concentric spherical type has consistent focal power, because meridian is identical with the radius of curvature in sagitta of arc direction, avoids the generation of astigmatism, also there is not the problem of the demoulding simultaneously.But by the restriction of blow molding process technical characterstic, the Wall thickness uniformity of this kind of ball cover is not good, and image quality is very poor, is difficult to the requirement meeting high definition imaging optical system.
Therefore wish a kind of technical scheme to overcome or at least to alleviate in the above-mentioned defect of prior art one or more.
Utility model content
Terminological interpretation
Focal power refers to the ability of optical elements focused or divergent rays, is generally the inverse of its focal length.
Astigmatism is the one of optical imagery aberration.Light beam is by after optical element, and the light beam in its meridian and sagitta of arc direction does not focus in same point, and imaging is occurred fuzzy, this kind of aberration is called astigmatism.
Meridian direction refers in particular to the direction of revolution solid along its bus in this article.
The direction of revolution solid along rotation round is refered in particular in sagitta of arc direction in this article, and sagitta of arc direction is perpendicular to meridian direction and gyroaxis.
Ring surface is the one of optical surface, and shape is equivalent to conventional tyre surface.The key property of ring surface is that meridian and sagitta of arc direction have different radius of curvature.
The purpose of this utility model is to provide a kind of video camera ball cover to overcome or at least to alleviate in the above-mentioned defect of prior art one or more.
For achieving the above object, the utility model provides a kind of video camera ball cover, described video camera ball cover comprises the land portions being positioned at center and the marginal portion be attached thereto, the inner surface of described marginal portion and outer surface are the surface of revolution, and its axis of rotation is parallel to the axis of rotation of described land portions, described inner surface from described land portions junction on the direction away from described land portions, radius of gyration dullness increases, and the meridian direction of described marginal portion is all identical with described land portions with the focal power in sagitta of arc direction.It is pointed out that in the utility model, the implication of " equal " comprises " roughly equal ", for example, in the difference of two values and in both, the absolute value of the ratio of higher value is less than 10%, think " equal ".
Preferably, the inner surface of described marginal portion is taper seat, and this taper seat is connected with the inner surface of described land portions is tangent; The outer surface of described marginal portion is ring surface, and this ring surface is connected with the outer surface of described land portions is tangent.
Preferably, the inner surface of described marginal portion is taper seat, and the bus of this taper seat is relative to tangent line at connecting portion place of the inner surface of described land portions to inner rotary angle correction, and wherein said angle correction is greater than 0 degree and is less than or equal to 3 degree; The outer surface of described marginal portion is ring surface, and this ring surface is connected with the outer surface of described land portions is tangent.
Preferably, the curvature of the meridian direction of described ring surface equals described taper seat and the described ring surface difference in the curvature in sagitta of arc direction.
Preferably, the angle between the bus of described taper seat and described axis of rotation is more than or equal to 0.1 degree, is less than or equal to 30 degree.Further preferably, 15 degree are less than or equal to.
Preferably, the inner surface of described marginal portion is ring surface, and this ring surface is connected with the inner surface of described land portions is tangent; The outer surface of described marginal portion is taper seat, and this taper seat is connected with the outer surface of described land portions is tangent.
Preferably, the inner surface of described marginal portion is ring surface, and this ring surface is connected with the inner surface of described land portions is tangent; The outer surface of described marginal portion is taper seat, and the bus of this taper seat inwardly rotates an angle correction relative to the tangent line of outer surface at connecting portion place of described land portions, and wherein said angle correction is greater than 0 degree and is less than or equal to 3 degree.
Preferably, the difference of the curvature of the meridian direction of described ring surface is identical in the difference of the curvature in sagitta of arc direction with described taper seat with described ring surface.
Preferably, the inner surface of described marginal portion is the first ring surface, and this first ring surface is connected with the inner surface of described land portions is tangent; The outer surface of described marginal portion is the second ring surface, and this second ring surface is connected with the outer surface of described land portions is tangent.
Preferably, described first ring surface is identical in the difference of the curvature in sagitta of arc direction with both in the difference of the curvature of meridian direction with described second ring surface.
Due to the utility model, the meridian direction of video camera ball cover marginal portion and the focal power in sagitta of arc direction to be arranged to land portions identical, therefore light beam is by after ball cover, the meridian direction of ball cover and the light beam in sagitta of arc direction can focus in same point, eliminating in prior art because the astigmatism that same point produces is failed to focus in meridian direction and sagitta of arc direction, providing advantage for obtaining imaging clearly.
The utility model also provides a kind of optical imaging system, and described optical imaging system comprises video camera ball cover described above.
Accompanying drawing explanation
Fig. 1 provides by the utility model the structural representation of video camera ball cover.
Reference numeral:
| A | Land portions | B | Marginal portion |
| 1 | The inner surface of land portions | 2 | The outer surface of land portions |
| 3 | The inner surface of marginal portion | 4 | The outer surface of marginal portion |
| O | Gyroaxis |
Embodiment
The object implemented for making the utility model, technical scheme and advantage clearly, below in conjunction with the accompanying drawing in the utility model embodiment, are further described in more detail the technical scheme in the utility model embodiment.In the accompanying drawings, same or similar label represents same or similar element or has element that is identical or similar functions from start to finish.Described embodiment is the utility model part embodiment, instead of whole embodiments.Be exemplary below by the embodiment be described with reference to the drawings, be intended to for explaining the utility model, and can not be interpreted as restriction of the present utility model.Based on the embodiment in the utility model, those of ordinary skill in the art are not making the every other embodiment obtained under creative work prerequisite, all belong to the scope of the utility model protection.Below in conjunction with accompanying drawing, embodiment of the present utility model is described in detail.
In description of the present utility model, it will be appreciated that, term " " center ", " longitudinal direction ", " transverse direction ", " front ", " afterwards ", " left side ", " right side ", " vertically ", " level ", " top ", " end " " interior ", orientation or the position relationship of the instruction such as " outward " are based on orientation shown in the drawings or position relationship, only the utility model and simplified characterization for convenience of description, instead of indicate or imply that the device of indication or element must have specific orientation, with specific azimuth configuration and operation, therefore the restriction to the utility model protection range can not be interpreted as.
The land portions being positioned at center and the marginal portion be attached thereto is comprised according to video camera ball cover of the present utility model.The inner surface of described marginal portion and outer surface are the surface of revolution, and its axis of rotation is parallel to the axis of rotation of described land portions, described inner surface from described land portions junction on the direction away from described land portions, radius of gyration dullness increases, and the meridian direction of described marginal portion is all identical with described land portions with the focal power in sagitta of arc direction.
Due to the utility model, the meridian direction of video camera ball cover marginal portion and the focal power in sagitta of arc direction to be arranged to land portions identical, therefore light beam is by after ball cover, the meridian direction of ball cover and the light beam in sagitta of arc direction can focus in same point, eliminating in prior art because the astigmatism that same point produces is failed to focus in meridian direction and sagitta of arc direction, providing advantage for obtaining imaging clearly.
As shown in Figure 1, video camera ball cover (hereinafter referred to as ball cover) adopts revolution symmetrical structure form, has gyroaxis O.The fringe region that ball cover comprises central area and is attached thereto.Central area is formed by land portions A, namely inner surface 1 and outer surface 2 all adopt sphere, and the centre of sphere of inner surface 1 and outer surface 2 overlaps, i.e. two spherical concentric, therefore light beam is by after land portions A, the meridian direction of land portions A and the light beam in sagitta of arc direction can focus in same point, stigmatic, imaging clearly.Fringe region is positioned at the periphery of central area, corresponding to marginal portion B.In prior art, land portions A is not identical in meridian direction focal power with marginal portion B, therefore makes ball cover fail to focus on same point at the light beam in meridian direction and sagitta of arc direction, and produces astigmatism.
Given this, land portions A and marginal portion B is all arranged to identical or roughly the same in the focal power in meridian direction and sagitta of arc direction by the utility model, to avoid the astigmatism problem of prior art as far as possible.
Particularly, the focal power of the meridian direction of marginal portion B is identical with the focal power of the meridian direction of land portions A, and the focal power in the sagitta of arc direction of marginal portion B is identical with the focal power in the sagitta of arc direction of land portions A.
Therefore, light beam is by after ball cover provided by the utility model, the meridian direction of the ball cover of whole hemispherical structure and the light beam in sagitta of arc direction can focus in same point, eliminating in prior art because the astigmatism that same point produces is failed to focus in meridian direction and sagitta of arc direction, providing advantage for obtaining imaging clearly.
Above-mentioned " focal power " refers to the ability of optical elements focused or divergent rays.The computing formula of focal power is: focal power=n '/f '=(n '-n) * C, in formula, n and n ' is the refractive index (air side is 1) of surperficial both sides respectively, and C is the curvature on surface, and f ' is focal length.That is, refractive index n, the n ' of focal power and surperficial both sides are relevant with the curvature C on surface, and thus, the control of the focal power of marginal portion B can extend the requirement of two aspects:
One, by land portions A and marginal portion B is used identical making material, just can meet the land portions A requirement identical with the refractive index of marginal portion B.
Two, by controlling the curvature of land portions A and marginal portion B, make the focal power of the meridian direction of marginal portion B identical with the focal power of the meridian direction of land portions A, the focal power in the sagitta of arc direction of marginal portion B is identical with the focal power in the sagitta of arc direction of land portions A.And the focal power of the meridian direction of marginal portion B is approximately equal to the superposition of the focal power of the inner surface 3 of marginal portion B and the meridian direction of outer surface 4, the focal power in the sagitta of arc direction of marginal portion B is approximately equal to the superposition of the focal power in the inner surface 3 of marginal portion B and the sagitta of arc direction of outer surface 4.
On the basis of requirement meeting at first, then meet second point, just can realize land portions A all identical with the focal power in sagitta of arc direction at meridian direction with marginal portion B.The implementation of second point is described below by some embodiments.
Embodiment 1:
The inner surface 3 of marginal portion B adopts taper seat, and this taper seat and the inner surface 1 of land portions A be tangent to be connected or close to tangent connection, thus can introduce certain curvature in sagitta of arc direction.The outer surface 4 of marginal portion B is ring surface, and this ring surface is connected with the outer surface 2 of land portions A is tangent, and ring surface has different curvature at meridian direction and sagitta of arc direction, thus can all introduce different curvature at meridian direction and sagitta of arc direction.By inner surface 3 and outer surface 4 are combined, focal power after combination is consistent with the focal power of land portions A respectively with sagitta of arc direction at meridian direction, ball cover is now equivalent to the ball cover of the spherical surface type of a hemispherical in optical characteristics, therefore no matter from land portions A, or marginal portion B, light beam can focus in same point all the time at meridian direction and sagitta of arc direction, avoids the generation of astigmatism.
The curvature of the meridian direction of taper seat (inner surface 3) is zero, and the curvature in sagitta of arc direction is the inverse of its radius of gyration; The curvature in the sagitta of arc direction of ring surface (outer surface 4) is the inverse of its radius of gyration, and the curvature of meridian direction is close to taper seat and the ring surface difference in the curvature in sagitta of arc direction.By by taper seat and ring surface after the focal power superposition of meridian direction and ring surface, can find out, the focal power of marginal portion B then keeps roughly the same with land portions A, namely the meridian direction of described marginal portion is all identical with described land portions with the focal power in sagitta of arc direction, thus eliminates astigmatism preferably.
The inner surface 3 (taper seat) of marginal portion B is connected close to tangent with the inner surface 1 of land portions A, refers to that the tangent line of the inner surface 1 of the bus of this taper seat relative to described land portions A at connecting portion place is to inner rotary angle correction.Advantageously, described angle correction is greater than 0 degree and is less than or equal to 3 degree.Such as, in one embodiment, described angle correction is 0.2 degree.Why arranging above-mentioned angle correction is for following consideration.
When practical application, for the taper seat technical scheme that be connected tangent with the inner surface 1 of land portions A, detect: when horizontal direction chief ray passes through inner surface 3 and the outer surface 4 of marginal portion B, the deviation of about about 0.03 ° can be produced.If be used on the optical imaging system of long-focus, this deviation can produce some adverse influences to imaging.By arranging described correction angle, this deviation can be compensated.Because inner surface 3 is taper seats, namely therefore change angle correction is the conicity that trace revises taper seat.Along with the change of the conicity of inner surface 3, the horizontal chief ray drift angle of penetration edges part B changes thereupon, when being adjusted to certain specific less value, and the incident chief ray of marginal portion B and outgoing chief ray keeping parallelism.Now, revise focal power and astigmatism characteristic that angle both can not affect ball cover entirety, the slight angle of light can be compensated again simultaneously, thus achieve excellent imaging effect.
It should be noted that, once exist above-mentioned " correction angle ", then cannot be completely tangent between the inner surface 1 of above-mentioned taper seat and land portions A, but can close to tangent connection.
Advantageously, the angle between the bus of described taper seat and described axis of rotation is more than or equal to 0.1 degree, is less than or equal to 30 degree, thus is convenient to the demoulding.Angle is larger, and work in-process more easily realizes demoulding; But angle too conference causes the increase of the bore of marginal portion too fast, thus makes the cumulative volume of ball cover excessive.Therefore, preferably, the angle between the bus of described taper seat and described axis of rotation is less than or equal to 15 degree.
Embodiment 2:
The inner surface 3 of marginal portion B adopts ring surface, and this ring surface is connected with the inner surface 1 of land portions A is tangent, and ring surface has different curvature at meridian direction and sagitta of arc direction, thus can all introduce different curvature at meridian direction and sagitta of arc direction.The outer surface 4 of marginal portion B is taper seat, and this taper seat and the outer surface 2 of land portions A be tangent to be connected or close to tangent connection, thus can introduce certain curvature in sagitta of arc direction.By inner surface 3 and outer surface 4 are combined, focal power after combination is consistent with the focal power of land portions A respectively with sagitta of arc direction at meridian direction, ball cover is now equivalent to the ball cover of the spherical surface type of a hemispherical in optical characteristics, therefore no matter from land portions A, or marginal portion B, light beam can focus in same point all the time at meridian direction and sagitta of arc direction, avoids the generation of astigmatism.
The curvature of the meridian direction of ring surface (inner surface 3) is close to ring surface and the taper seat difference in the curvature in sagitta of arc direction, and the curvature in sagitta of arc direction is the inverse of its radius of gyration.The curvature of the meridian direction of taper seat (outer surface 4) is zero, and the curvature in sagitta of arc direction is the inverse of its radius of gyration.By by ring surface and taper seat after the focal power superposition of meridian direction and ring surface, can find out, the focal power of marginal portion B then keeps identical with land portions A, thus eliminates astigmatism.
The outer surface 4 (taper seat) of marginal portion B is connected close to tangent with the outer surface 2 of land portions A, refers to that the tangent line of the outer surface 2 of the bus of this taper seat relative to described land portions A at connecting portion place inwardly rotates an angle correction.Preferably, described angle correction is greater than 0 degree and is less than or equal to 3 degree.Advantageously, described angle correction is greater than 0 degree and is less than or equal to 3 degree.Such as, in one embodiment, described angle correction is 0.2 degree.Why arranging above-mentioned angle correction is for following consideration.
When practical application, for the taper seat technical scheme that be connected tangent with the outer surface 2 of land portions A, when horizontal direction chief ray passes through inner surface 3 and the outer surface 4 of marginal portion B, the deviation of about about 0.03 ° can be produced.If be used on the optical imaging system of long-focus, this deviation can produce some adverse influences to imaging.Above-mentioned correction angle is set and can compensates this deviation.Along with the change of this correction angle, the light drift angle of penetration edges part B changes thereupon, when being adjusted to certain specific less value, and the incident chief ray of marginal portion B and outgoing chief ray keeping parallelism.Now, revise focal power and astigmatism characteristic that angle both can not affect ball cover entirety, the slight angle of light can be compensated again simultaneously, thus achieve excellent imaging effect.
It should be noted that, once exist above-mentioned " correction angle ", then cannot be completely tangent between the inner surface 1 of above-mentioned taper seat and land portions A, but can close to tangent connection.
Embodiment 3:
The inner surface 3 of marginal portion B adopts the first ring surface, first ring surface is connected with the inner surface 1 of land portions A is tangent, first ring surface has different curvature at meridian direction and sagitta of arc direction, thus can all introduce different curvature at meridian direction and sagitta of arc direction.The outer surface 4 of marginal portion B is the second ring surface, and this second ring surface is connected with the outer surface 2 of land portions A is tangent, thus also can all introduce different curvature at meridian direction and sagitta of arc direction.By inner surface 3 and outer surface 4 are combined, focal power after combination is consistent with the focal power of land portions A respectively with sagitta of arc direction at meridian direction, ball cover is now equivalent to the ball cover of the spherical surface type of a hemispherical in optical characteristics, therefore no matter from land portions A, or marginal portion B, light beam can focus in same point all the time at meridian direction and sagitta of arc direction, avoids the generation of astigmatism.
The curvature in the sagitta of arc direction of the first ring surface (inner surface 3) is the inverse of its radius of gyration, and the curvature in the sagitta of arc direction of the second ring surface (outer surface 4) is the inverse of its radius of gyration.First ring surface and the second ring surface are in the difference of the differential of the curvature of meridian direction both curvature in sagitta of arc direction nearly.By by the first ring surface and the second ring surface after the focal power superposition of meridian direction and ring surface, can find out, the focal power of marginal portion B then keeps identical with land portions A, thus eliminates astigmatism.
In fact, the inner surface 3 of marginal portion B and outer surface 4 can also be the curved surfaces of other shape.Such as, the bus of inner surface is made up of the first straightway and the first circular arc line, and the bus of outer surface is made up of the second circular arc line and the second straightway.Again such as, the bus of inner surface is made up of the circular arc line of multistage different radii, and the bus of outer surface is also made up of the circular arc line of different radii.Will not enumerate at this, as long as total ensure that inner surface 3 is identical respectively on meridian direction with sagitta of arc direction with land portions A with the focal power of outer surface 4.
Above-mentioned " chief ray " mentioned refers to the centre of sphere by ball cover and direction is the light of level.
Being meant to of above-mentioned " close " mentioned is approximate or substantially equal.
The utility model also provides a kind of optical imaging system, and it at least comprises the ball cover in the various embodiments described above, and the other parts in described optical imaging system are prior art, no longer launches to describe at this.
Finally it is to be noted: above embodiment only in order to the technical solution of the utility model to be described, is not intended to limit.Although be described in detail the utility model with reference to previous embodiment, those of ordinary skill in the art is to be understood that: it still can be modified to the technical scheme described in foregoing embodiments, or carries out equivalent replacement to wherein portion of techniques feature; And these amendments or replacement, do not make the essence of appropriate technical solution depart from the spirit and scope of each embodiment technical scheme of the utility model.
Claims (10)
1. a video camera ball cover, it comprises the land portions (A) being positioned at center and the marginal portion (B) be attached thereto, it is characterized in that: the inner surface of described marginal portion (B) and outer surface are the surface of revolution, and its axis of rotation is parallel to the axis of rotation of described land portions, described inner surface from described land portions junction on the direction away from described land portions, radius of gyration dullness increases, and the meridian direction of described marginal portion (B) and the focal power in sagitta of arc direction are all identical with described land portions (A).
2. video camera ball cover as claimed in claim 1, it is characterized in that: the inner surface (3) of described marginal portion (B) is taper seat, this taper seat is connected with the inner surface (1) of described land portions (A) is tangent; The outer surface (4) of described marginal portion (B) is ring surface, and this ring surface is connected with the outer surface (2) of described land portions (A) is tangent.
3. video camera ball cover as claimed in claim 1, it is characterized in that: the inner surface (3) of described marginal portion (B) is taper seat, the bus of this taper seat is relative to tangent line at connecting portion place of the inner surface (1) of described land portions (A) to inner rotary angle correction, and wherein said angle correction is greater than 0 degree and is less than or equal to 3 degree; The outer surface (4) of described marginal portion (B) is ring surface, and this ring surface is connected with the outer surface (2) of described land portions (A) is tangent.
4. as claimed in claim 2 or claim 3 video camera ball cover, is characterized in that: the curvature of the meridian direction of described ring surface equals described taper seat and the described ring surface difference in the curvature in sagitta of arc direction.
5. video camera ball cover as claimed in claim 2 or claim 3, is characterized in that: the angle between the bus of described taper seat and described axis of rotation is more than or equal to 0.1 degree, is less than or equal to 30 degree.
6. video camera ball cover as claimed in claim 1, it is characterized in that: the inner surface (3) of described marginal portion (B) is ring surface, this ring surface is connected with the inner surface (1) of described land portions (A) is tangent; The outer surface (4) of described marginal portion (B) is taper seat, and this taper seat is connected with the outer surface (2) of described land portions (A) is tangent.
7. video camera ball cover as claimed in claim 6, it is characterized in that: the inner surface (3) of described marginal portion (B) is ring surface, this ring surface is connected with the inner surface (1) of described land portions (A) is tangent; The outer surface (4) of described marginal portion (B) is taper seat, the bus of this taper seat inwardly rotates an angle correction relative to the tangent line of outer surface (2) at connecting portion place of described land portions (A), and wherein said angle correction is greater than 0 degree and is less than or equal to 3 degree.
8. video camera ball cover as claimed in claim 7, is characterized in that: the difference of the curvature of the meridian direction of described ring surface is identical in the difference of the curvature in sagitta of arc direction with described taper seat with described ring surface.
9. video camera ball cover as claimed in claim 1, it is characterized in that: the inner surface (3) of described marginal portion (B) is the first ring surface, this first ring surface is connected with the inner surface (1) of described land portions (A) is tangent; The outer surface (4) of described marginal portion (B) is the second ring surface, and this second ring surface is connected with the outer surface (2) of described land portions (A) is tangent.
10. video camera ball cover as claimed in claim 9, is characterized in that: described first ring surface is identical in the difference of the curvature in sagitta of arc direction with both in the difference of the curvature of meridian direction with described second ring surface.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201520045135.XU CN204392696U (en) | 2015-01-22 | 2015-01-22 | A kind of video camera ball cover |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201520045135.XU CN204392696U (en) | 2015-01-22 | 2015-01-22 | A kind of video camera ball cover |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN204392696U true CN204392696U (en) | 2015-06-10 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201520045135.XU Withdrawn - After Issue CN204392696U (en) | 2015-01-22 | 2015-01-22 | A kind of video camera ball cover |
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| CN (1) | CN204392696U (en) |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO2016115951A1 (en) * | 2015-01-22 | 2016-07-28 | 杭州海康威视数字技术股份有限公司 | Camera dome cover |
| WO2019140820A1 (en) * | 2018-01-22 | 2019-07-25 | 杭州海康威视数字技术股份有限公司 | Transparent cover and optical camera system |
| CN110068981A (en) * | 2018-01-22 | 2019-07-30 | 杭州海康威视数字技术股份有限公司 | A kind of translucent cover and the imaging optical system with it |
-
2015
- 2015-01-22 CN CN201520045135.XU patent/CN204392696U/en not_active Withdrawn - After Issue
Cited By (9)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO2016115951A1 (en) * | 2015-01-22 | 2016-07-28 | 杭州海康威视数字技术股份有限公司 | Camera dome cover |
| CN105873383A (en) * | 2015-01-22 | 2016-08-17 | 杭州海康威视数字技术股份有限公司 | Camera dome cover |
| EP3249463A4 (en) * | 2015-01-22 | 2018-08-29 | Hangzhou Hikvision Digital Technology Co., Ltd. | Camera dome cover |
| US10104274B2 (en) | 2015-01-22 | 2018-10-16 | Hangzhou Hikvision Digital Technology Co., Ltd. | Dome camera |
| CN105873383B (en) * | 2015-01-22 | 2018-10-26 | 杭州海康威视数字技术股份有限公司 | A kind of video camera ball cover |
| WO2019140820A1 (en) * | 2018-01-22 | 2019-07-25 | 杭州海康威视数字技术股份有限公司 | Transparent cover and optical camera system |
| CN110068981A (en) * | 2018-01-22 | 2019-07-30 | 杭州海康威视数字技术股份有限公司 | A kind of translucent cover and the imaging optical system with it |
| EP3745199A4 (en) * | 2018-01-22 | 2021-03-17 | Hangzhou Hikvision Digital Technology Co., Ltd. | Transparent cover and optical camera system |
| US11150543B2 (en) | 2018-01-22 | 2021-10-19 | Hangzhou Hikvision Digital Technology Co., Ltd. | Transparent cover and imaging optical system |
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