CN106168730A - Camera head - Google Patents
Camera head Download PDFInfo
- Publication number
- CN106168730A CN106168730A CN201610264867.7A CN201610264867A CN106168730A CN 106168730 A CN106168730 A CN 106168730A CN 201610264867 A CN201610264867 A CN 201610264867A CN 106168730 A CN106168730 A CN 106168730A
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- China
- Prior art keywords
- optical filter
- photo
- rectangle
- opposite side
- photosensitive region
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- G—PHYSICS
- G03—PHOTOGRAPHY; CINEMATOGRAPHY; ANALOGOUS TECHNIQUES USING WAVES OTHER THAN OPTICAL WAVES; ELECTROGRAPHY; HOLOGRAPHY
- G03B—APPARATUS OR ARRANGEMENTS FOR TAKING PHOTOGRAPHS OR FOR PROJECTING OR VIEWING THEM; APPARATUS OR ARRANGEMENTS EMPLOYING ANALOGOUS TECHNIQUES USING WAVES OTHER THAN OPTICAL WAVES; ACCESSORIES THEREFOR
- G03B17/00—Details of cameras or camera bodies; Accessories therefor
- G03B17/02—Bodies
- G03B17/12—Bodies with means for supporting objectives, supplementary lenses, filters, masks, or turrets
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- Physics & Mathematics (AREA)
- General Physics & Mathematics (AREA)
- Blocking Light For Cameras (AREA)
- Studio Devices (AREA)
Abstract
The invention discloses a kind of camera head, including camera lens, rectangle optical filter and imageing sensor；Imageing sensor is provided with rectangular photosensitive region near the one side of optical filter, and center and the rectangular photosensitive region of rectangle optical filter are centrally located on the straight line at optical axis place of camera lens；Two groups of opposite side of rectangle optical filter are the most parallel with the two of rectangular photosensitive region groups of opposite side and at least first group of opposite side of rectangle optical filter meets following condition: L2For the length of first group of opposite side of rectangle optical filter, L3For the length of the first group of opposite side in rectangular photosensitive region, D2For rectangle optical filter near the distance between the surface of camera lens and rectangular photosensitive region；The rectangle optical filter surface configuration parallel with rectangular photosensitive region has two the first photo-shield strips, and the length direction of second group of opposite side of the length direction of every first photo-shield strip and rectangle optical filter is consistent and the relative side of two the first photo-shield strip adjacent second group of opposite side of rectangle optical filter respectively.The present invention solves the technical problem that veiling glare is big to Imaging.
Description
Technical field
The present invention relates to optical image technology field, particularly to a kind of camera head.
Background technology
Existing coaxial video camera, as it is shown in figure 1, include the camera lens 10 that order is arranged, optical filter 21 and imageing sensor,
Wherein, optical filter 21 is arranged on the window's position of optical filter fixed window 22.Scene reflections in the range of angle of visual field α of camera lens 10
Light is radiated on the rectangular photosensitive region 31 of imageing sensor by camera lens 10 and optical filter 21, and optical signal is turned by imageing sensor
Change the signal of telecommunication into and form the image of video camera shooting.Owing to optical filter 21 and optical filter fixed window 22 have certain thickness,
When the outside at the angle of visual field edge of camera lens 10 exists intense light source 40, the light that intense light source 40 sends is radiated at optical filter through camera lens
21 and the window side of optical filter fixed window 22, the window side of filtered 21 and optical filter fixed window 22 reflects to form spuious
Light, veiling glare can collect filter in the rectangular photosensitive region of the imaging in imageing sensor rectangular photosensitive region, i.e. imageing sensor
The veiling glare that the window side of mating plate and optical filter fixed window reflects to form, forms light at the edge of the image of video camera shooting
Speckle, the effect causing video camera imaging is poor.In order to reduce the veiling glare impact on video camera imaging, can strengthen optical filter and
The size of the window of optical filter fixed window, so can make that the window edge of optical filter and optical filter fixed window reflects to form is miscellaneous
The major part of astigmatism cannot be irradiated on imageing sensor, reduces the veiling glare impact on video camera imaging.But, this is not only
Need to increase window and the size of optical filter of optical filter fixed window, and the miscellaneous part with existing video camera can be caused such as
Not mating of the parts such as generic mirror headstock, need the miscellaneous part to video camera again to model, considerably increase cost.
Summary of the invention
The invention provides a kind of camera head, solve the technical problem that veiling glare is big on video camera imaging impact.
For reaching above-mentioned purpose, the present invention provides techniques below scheme:
A kind of camera head, the camera lens arranged including order, optical filter and imageing sensor；Described optical filter is rectangle filter
Mating plate, described imageing sensor is provided with rectangular photosensitive region, in described rectangle optical filter near the one side of described optical filter
The heart and rectangular photosensitive region are centrally located on the straight line at optical axis place of described camera lens；
Two groups of opposite side in two groups of opposite side of described rectangle optical filter and described rectangular photosensitive region are the most parallel and at least institute
State first group of opposite side of rectangle optical filter and meet following condition:
Wherein, L2For the length of first group of opposite side of rectangle optical filter, L3For rectangular photosensitive region first
The length of group opposite side, D2For rectangle optical filter near the distance between the surface of camera lens and rectangular photosensitive region；Described rectangle is filtered
The mating plate surface configuration parallel with described rectangular photosensitive region has two the first photo-shield strips, the length of every described first photo-shield strip
The length direction of the second group of opposite side in direction and rectangle optical filter is consistent and two described first photo-shield strips distinguish adjacent described rectangles
The relative side of second group of opposite side of optical filter.
Preferably, the length of every described first photo-shield strip is consistent to edge lengths with rectangle optical filter second group.
Preferably, the width of described first photo-shield stripWherein, L1For in camera lens
Near the diameter of the lens of described optical filter, D1For rectangle optical filter close described optical filter in the surface and camera lens of camera lens
Lens place, edge plane between distance, L1, L2, L3, D1, D2Unit be millimeter.
Preferably, the width of described first photo-shield stripWherein, L1For in camera lens
Near the diameter of the lens of described optical filter, D1For rectangle optical filter close described optical filter in the surface and camera lens of camera lens
Lens place, edge plane between distance, L1, L2, L3, D1, D2Unit be millimeter.
Preferably, second group of opposite side of described rectangle optical filter meets following condition:
Wherein, L2' for the length of described second group of opposite side of rectangle optical filter, L3' for rectangular photosensitive district
The length of the second group of opposite side in territory, the described rectangle optical filter surface configuration parallel with described rectangular photosensitive region has two second screenings
Light belt, the length direction of first group of opposite side of the length direction of every described second photo-shield strip and rectangle optical filter is consistent and two institutes
State the relative side of the second photo-shield strip adjacent described first group of opposite side of rectangle optical filter respectively.
Preferably, the width of described second photo-shield stripL2', L3' unit
For millimeter.
Preferably, the width of described second photo-shield strip isL2', L3' unit
For millimeter.
Preferably, described first photo-shield strip and described second photo-shield strip are positioned at the described optical filter one side near camera lens.
Preferably, the thickness of described first photo-shield strip and described second photo-shield strip is less than 0.05mm.
Preferably, camera head also includes that optical filter fixed window, described optical filter fixed window have the filter window of rectangle,
The thickness of described optical filter fixed windowThe thickness of described optical filter
The camera head of the present invention, when there is intense light source in the outside at the angle of visual field α edge of camera lens, the light that intense light source sends
It is pointed into the side that optical filter is vertical with rectangular photosensitive region, owing to some light is blocked cannot filter by the first photo-shield strip through lens
The side that mating plate is vertical with rectangular photosensitive region is reflected so that the light that intense light source sends cannot be radiated at imageing sensor
Rectangular photosensitive region, reduces the impact on camera head imaging of light-initiated veiling glare that intense light source sends, improves
The effect of camera head imaging.
Accompanying drawing explanation
Fig. 1 is the partial schematic diagram of the camera head of prior art；
Fig. 2 is the partial schematic diagram of an embodiment of camera head of the present invention；
Fig. 3 is the principle schematic of the camera head shown in Fig. 2；
Fig. 4 is the principle schematic of the first photo-shield strip width of the camera head shown in Fig. 2；
Fig. 5 is the partial schematic diagram of another embodiment of camera head of the present invention.
Main element description of reference numerals:
In background technology:
10 camera lenses, 21 optical filters, 22 optical filter fixed windows, the rectangular photosensitive region of 31 imageing sensors,
40 intense light sources；
In the present invention:
100 camera lenses, 210 optical filters, 310 rectangular photosensitive regions, 410 first photo-shield strips, 500 intense light sources.
Detailed description of the invention
Below in conjunction with the accompanying drawing in the embodiment of the present invention, the technical scheme in the embodiment of the present invention is carried out clear, complete
Describe, it is clear that described embodiment is only a part of embodiment of the present invention rather than whole embodiments wholely.Based on
Embodiment in the present invention, it is every other that those of ordinary skill in the art are obtained under not making creative work premise
Embodiment, broadly falls into the scope of protection of the invention.
Embodiment one
The camera head of one embodiment of the present of invention, as in figure 2 it is shown, include the incident direction order setting along light
Camera lens 100, optical filter 210 and imageing sensor；Described optical filter is rectangle optical filter, and described imageing sensor is near described filter
The one side of mating plate is provided with rectangular photosensitive region 310, in the center of described rectangle optical filter 210 and rectangular photosensitive region 310
The heart is positioned on the straight line at optical axis place of described camera lens；
Two groups of opposite side in two groups of opposite side of described rectangle optical filter 210 and described rectangular photosensitive region 310 the most parallel and
First group of opposite side of the most described rectangle optical filter meets following condition:
Wherein, L2For the length of 210 first groups of opposite side of rectangle optical filter, L3For rectangular photosensitive region
The length of 310 first groups of opposite side, D2For rectangle optical filter 210 near between the surface of camera lens and rectangular photosensitive region 310 away from
From；Described rectangle optical filter 210 surface configuration parallel with described rectangular photosensitive region has two width to be the first of preset value
Photo-shield strip 410, the rectangle optical filter surface parallel with described rectangular photosensitive region includes that rectangle optical filter is near rectangular photosensitive district
The one side in territory and rectangle optical filter are near the one side of optical filter, the length direction of every described first photo-shield strip and rectangle optical filter
The length direction of second group of opposite side is consistent, and the length of every described first photo-shield strip and rectangle optical filter second group are to edge lengths one
Cause, and the relative side of two described first photo-shield strip adjacent described second group of opposite side of rectangle optical filter respectively.
The principle of the camera head of the present embodiment is as follows: as it is shown on figure 3,
In triangle ABC, ∠ BCA β represents.It is miscellaneous that the offside reflection that optical filter is vertical with rectangular photosensitive region is formed
The angle of emergence of astigmatism is less than β, and the rectangular photosensitive region of imageing sensor can collect the veiling glare that optical filter reflects to form.
About the span of β, β is the biggest, and the rectangular photosensitive region of imageing sensor can collect optical filter and reflect to form
Veiling glare the most, β is the least, and the rectangular photosensitive region of imageing sensor can collect veiling glare that optical filter reflects to form more
Few.It is thus desirable to find a marginal value of β, less than marginal value, β then thinks that the rectangular photosensitive region of imageing sensor can gather
The veiling glare reflected to form to optical filter is considerably less, and the impact on camera head imaging is not considered.Marginal value elects 30 as
Degree, when β is less than 30 degree, the impact of camera head imaging is not considered by veiling glare；When β is more than or equal to 30 degree, need
Try every possible means to reduce the veiling glare impact on camera head imaging.The marginal value of β selects the reason of 30 degree to be, at camera lens
When the outside at angle of visual field α edge exists intense light source 500, through the reflection at the edge of optical filter, spuious less than 30 degree of the angle of emergence
Light is the most considerably less, can ignore the impact on camera head imaging.
When β is more than or equal to 30 degree,Can deriveAt this time, it may be necessary to
Process veiling glare to reduce the impact on camera head imaging.By cutting off the route of transmission of veiling glare, permissible
Stray illumination is stoped to be mapped to the rectangular photosensitive region of imageing sensor.The method used is in rectangle optical filter and rectangular photosensitive district
Two the first photo-shield strips of surface configuration that territory is parallel, the length direction of every described first photo-shield strip and rectangle optical filter second group
The length direction of opposite side is consistent and two described first photo-shield strips distinguish the relative of adjacent described second group of opposite side of rectangle optical filter
Side.So, the first photo-shield strip has blocked a part of light being pointed into the optical filter side vertical with rectangular photosensitive region
Light path, decreases and is pointed into the light in rectangular photosensitive region because of the optical filter offside reflection vertical with rectangular photosensitive region；With
Time also blocked the light in the optical filter offside reflection vertical with the rectangular photosensitive region rectangular photosensitive region to imageing sensor,
Decrease the veiling glare impact on camera head imaging.
The camera head of the present embodiment, when there is intense light source in the outside at the angle of visual field α edge of camera lens, intense light source 500
The light gone out is pointed into, through lens, the side that optical filter is vertical with rectangular photosensitive region, owing to major part light is blocked by the first photo-shield strip
Cannot reflect in the side that optical filter is vertical with rectangular photosensitive region so that the light that intense light source sends cannot be radiated at image
The rectangular photosensitive region of sensor, the light that the intense light source in the outside largely reducing the angle of visual field α edge at camera lens sends
The veiling glare the caused impact on camera head imaging, improves the effect of camera head imaging.
Concrete, the width of the first photo-shield stripThe width of the first photo-shield strip is to be subject to
To limit, derivation is as follows:
As shown in Figure 4, triangle ABD and triangle AB'D' is similar triangles, and limit BD a represents, limitCan deriveLimit AD is the light energy through camera lens
Getting at the critical localisation of the leftmost side in the rectangular photosensitive region reaching imageing sensor, the width of the first photo-shield strip not can exceed that D point
Position.
Length b of CD represents, 2b+2a+L3=L2；Can derive
This is the Limit Width at the first photo-shield strip not considering the first photo-shield strip printing width and site error, it is contemplated that printing width
And site error, need suitably to reduce, the first photo-shield stripWherein, L1For camera lens
In near the diameter of lens of described optical filter, D1For the close described optical filtering in the surface and camera lens of camera lens of rectangle optical filter
Distance between place, the edge plane of the lens of sheet, L1, L2, L3, D1, D2Unit be millimeter..
So the first photo-shield strip of width, on the one hand can block the outside at the angle of visual field edge being positioned at camera lens and be positioned at square
The edge of filtered of the light that the intense light source outside second group of opposite side of shape optical filter sends is pointed into optical filter and rectangular photosensitive district
The light path of the light of the side that territory is vertical, has also blocked the optical filter offside reflection vertical with rectangular photosensitive region to image simultaneously
The light in the rectangular photosensitive region of sensor, it addition, the first photo-shield strip of such width does not interferes with the angle of visual field model of camera lens yet
Enclose the imaging in the rectangular photosensitive region of imageing sensor of the interior scenery.If the width of the first photo-shield strip exceedes above-mentioned width,
May result in the scenery in the range of the angle of visual field of camera lens to be affected in the rectangular photosensitive region of imageing sensor generation shadow
Risk.
As the optional mode of one, the width of described first photo-shield strip?So, the first photo-shield strip can block a part of edge being pointed into optical filter
The light path of light, can also block the edge reflections of a part of optical filter light to the rectangular photosensitive region of imageing sensor simultaneously
Line, decreases the veiling glare impact on camera head imaging.Although effect does not hasReduce
It is effective that veiling glare is risen, but can avoid the scenery in the range of the angle of view at imageing sensor to a greater extent
Rectangular photosensitive region be affected produce shadow risk.
In like manner, second group of opposite side of described rectangle optical filter meets following condition:
Wherein, L2' for the length of described second group of opposite side of rectangle optical filter, L3' for rectangular photosensitive district
The length of the second group of opposite side in territory, the described rectangle optical filter surface configuration parallel with described rectangular photosensitive region has two second screenings
Light belt, the length direction of first group of opposite side of the length direction of every described second photo-shield strip and rectangle optical filter is consistent and two institutes
State the relative side of the second photo-shield strip adjacent described first group of opposite side of rectangle optical filter respectively.
Preferably, the width of described second photo-shield strip isL2', L3' unit
For millimeter.
As the optional mode of one,L2', L3' unit be millimeter
Further, described first photo-shield strip and described second photo-shield strip are positioned at the described optical filter one side towards camera lens.
As such, it is possible to there is the light that intense light source sends in the outside farthest reducing the angle of visual field α edge of camera lens shines optical filter
The probability at edge.
Further, the thickness of described first photo-shield strip and described second photo-shield strip is less than 0.05mm.Such first
Photo-shield strip and the second photo-shield strip thickness are less, and the outside at the angle of visual field α edge decreasing camera lens exists the illumination that intense light source sends
Edge to the first photo-shield strip and described second photo-shield strip forms the probability of veiling glare again.Concrete, the first photo-shield strip and the
Two photo-shield strips use the formation of silk-screen.Silk-screen can be accurately controlled very much the first photo-shield strip and the width of the second photo-shield strip, precision
Higher；Silk-screen is formed simultaneously the first photo-shield strip and the thickness of the second photo-shield strip are the least.
Generally, the thickness of optical filter is less, and above-mentioned first photo-shield strip and the second photo-shield strip just can be by mirrors
There is the light that intense light source sends and shine the edge overwhelming majority of optical filter and block in the outside at angle of visual field α edge of head, but
When the thickness of optical filter is the biggest, the first photo-shield strip and the second photo-shield strip also cannot block veiling glare.Therefore, described optical filter
Thickness
Arranging the mode of optical filter in camera head, the most conventional is realized by optical filter fixed window, optical filter
Fixed window has the filter window of rectangle, the thickness of described optical filter fixed window
About optical filter and optical filter fixed window fixed form, can by include shown in the way of, optical filter can completely from
Filter window exposes；Can also is that mode as shown in Figure 5, the edge of the surrounding of optical filter is integrally fixed at optical filter fixed window
On the inside casing of filter window, now, because under normal circumstances, the edge of the surrounding of optical filter is fixed on optical filter fixed window
The width of inside casing of filter window be all less, thereforeImpact on this scope is the least, can neglect
Slightly.And the width L of the first photo-shield strip shown in derivation graph 20Mode also apply to the width of the first photo-shield strip shown in Fig. 5
Mode.So, the first photo-shield strip has blocked a part of light being pointed into the optical filter side vertical with rectangular photosensitive region
Light path, decreases and is pointed into the light in rectangular photosensitive region because of the optical filter offside reflection vertical with rectangular photosensitive region；With
Time also blocked the window inside casing of the optical filter side vertical with rectangular photosensitive region and optical filter fixed window and be reflected towards image and pass
The light in the rectangular photosensitive region of sensor, decreases the veiling glare impact on camera head imaging.
Obviously, those skilled in the art can carry out various change and modification without deviating from this to the embodiment of the present invention
Bright spirit and scope.So, if these amendments of the present invention and modification belong to the claims in the present invention and equivalent technologies thereof
Within the scope of, then the present invention is also intended to comprise these change and modification.
Claims (10)
1. a camera head, it is characterised in that include the camera lens that order is arranged, optical filter and imageing sensor；Described optical filtering
Sheet is rectangle optical filter, and described imageing sensor is provided with rectangular photosensitive region, described rectangle near the one side of described optical filter
Center and the rectangular photosensitive region of optical filter are centrally located on the straight line at optical axis place of described camera lens；
Two groups of opposite side of described rectangle optical filter distinguish parallel and the most described squares with two groups of opposite side in described rectangular photosensitive region
First group of opposite side of shape optical filter meets following condition:
Wherein, L2For the length of first group of opposite side of rectangle optical filter, L3For the first group pair, rectangular photosensitive region
The length on limit, D2For rectangle optical filter near the distance between the surface of camera lens and rectangular photosensitive region；Described rectangle optical filter
The surface configuration parallel with described rectangular photosensitive region has two the first photo-shield strips, the length direction of every described first photo-shield strip
And two described first photo-shield strip respectively adjacent described rectangles consistent with the length direction of second group of opposite side of rectangle optical filter filter
The relative side of second group of opposite side of sheet.
Camera head the most according to claim 1, it is characterised in that the length of every described first photo-shield strip is filtered with rectangle
Mating plate second group is consistent to edge lengths.
Camera head the most according to claim 2, it is characterised in that the width of described first photo-shield strip
Wherein, L1For the diameter of the lens of described optical filter close in camera lens, D1For rectangle optical filter in the surface and camera lens of camera lens
Distance between place, the edge plane of the lens of described optical filter, L1, L2, L3, D1, D2Unit be millimeter.
Camera head the most according to claim 2, it is characterised in that the width of described first photo-shield stripWherein, L1For the diameter of the lens of described optical filter close in camera lens, D1Lean on for rectangle optical filter
In the surface of portrait attachment and camera lens near described optical filter lens place, edge plane between distance, L1, L2, L3, D1, D2
Unit be millimeter.
Camera head the most according to claim 1, it is characterised in that second group of opposite side of described rectangle optical filter meets following
Condition:
Wherein, L2' for the length of described second group of opposite side of rectangle optical filter, L3' for rectangular photosensitive region
The length of two groups of opposite side, the described rectangle optical filter surface configuration parallel with described rectangular photosensitive region has two the second shadings
Band, the length direction of first group of opposite side of the length direction of every described second photo-shield strip and rectangle optical filter is consistent and described in two
The relative side of the second photo-shield strip adjacent described first group of opposite side of rectangle optical filter respectively.
Camera head the most according to claim 5, it is characterised in that the width of described second photo-shield stripL2', L3' unit be millimeter.
Camera head the most according to claim 5, it is characterised in that the width of described second photo-shield strip isL2', L3' unit be millimeter.
Camera head the most according to claim 5, it is characterised in that described first photo-shield strip and described second photo-shield strip position
In described optical filter near the one side of camera lens.
Camera head the most according to claim 5, it is characterised in that described first photo-shield strip and described second photo-shield strip
Thickness is less than 0.05mm.
Camera head the most according to claim 1 or 5, it is characterised in that camera head also includes optical filter fixed window,
Described optical filter fixed window has the filter window of rectangle, the thickness of described optical filter fixed windowDescribed
The thickness of optical filter
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201610264867.7A CN106168730A (en) | 2016-04-25 | 2016-04-25 | Camera head |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201610264867.7A CN106168730A (en) | 2016-04-25 | 2016-04-25 | Camera head |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN106168730A true CN106168730A (en) | 2016-11-30 |
Family
ID=57358944
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201610264867.7A Pending CN106168730A (en) | 2016-04-25 | 2016-04-25 | Camera head |
Country Status (1)
| Country | Link |
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| CN (1) | CN106168730A (en) |
Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101109837A (en) * | 2006-07-21 | 2008-01-23 | 鸿富锦精密工业（深圳）有限公司 | Lens module |
| CN102902137A (en) * | 2012-10-31 | 2013-01-30 | 信利光电(汕尾)有限公司 | Camera module and base thereof |
| CN103997596A (en) * | 2014-06-10 | 2014-08-20 | 信利光电股份有限公司 | Camera module |
| CN204481931U (en) * | 2015-01-15 | 2015-07-15 | 宁波舜宇光电信息有限公司 | A kind of black coating film optical filters and camera module |
| CN205643995U (en) * | 2016-04-25 | 2016-10-12 | 浙江大华技术股份有限公司 | Image capture device |
-
2016
- 2016-04-25 CN CN201610264867.7A patent/CN106168730A/en active Pending
Patent Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101109837A (en) * | 2006-07-21 | 2008-01-23 | 鸿富锦精密工业（深圳）有限公司 | Lens module |
| CN102902137A (en) * | 2012-10-31 | 2013-01-30 | 信利光电(汕尾)有限公司 | Camera module and base thereof |
| CN103997596A (en) * | 2014-06-10 | 2014-08-20 | 信利光电股份有限公司 | Camera module |
| CN204481931U (en) * | 2015-01-15 | 2015-07-15 | 宁波舜宇光电信息有限公司 | A kind of black coating film optical filters and camera module |
| CN205643995U (en) * | 2016-04-25 | 2016-10-12 | 浙江大华技术股份有限公司 | Image capture device |
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Application publication date: 20161130 |