CN100592191C - Image pickup device - Google Patents
Image pickup device Download PDFInfo
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- CN100592191C CN100592191C CN200710197078A CN200710197078A CN100592191C CN 100592191 C CN100592191 C CN 100592191C CN 200710197078 A CN200710197078 A CN 200710197078A CN 200710197078 A CN200710197078 A CN 200710197078A CN 100592191 C CN100592191 C CN 100592191C
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Abstract
The invention provides a camera device which can remove the water attached to a surface of an optical element to prevent the water attached to the surface of an optical element from causing bad influence. The camera device is provided with: protective glass (11), which includes an incident face reflected to a photography optical system comprising a lens (3); and a baffle plate (21), which can movebetween an opening position where the incident face (11a) of the protective glass (11) is unfolded and a closing position where the incident face is covered, and locates at the position where the incident face leaves when locating at the opening position, surface of the incident face (11a) of the protective glass (11) actualizes a hydrophobic coating including hydrophobicity, in the other hand, an opposite face (21a) of the baffle plate (21) opposite to the incident face actualizes a hydrophilic coating including hydrophilicity. Water drops split on the hydrophobic coating are absorbed in order to remove the water drops from the surface of the protective glass (11).
Description
Technical field
The present invention relates to camera head, relate to the camera head that to remove attached to the lip-deep water droplet of the optical element of camera head particularly.
Background technology
In recent years, known have in order to possess the camera head of proof mechanism of water using in the rain or in the water.When using this camera head in the rain or in the water, sometimes at the surface attachment water droplet of optical system, if under this state, photograph, then because the water droplet that adheres to might can blur by image or generation hot spot and ghost image.
As the technology of adhering to that prevents this water droplet, known have in the surface of optical element enforcement hydrophobic treatments, or utilize the technology on the surface of wiper (wiper) wiping optical element.For example, following technology being disclosed in patent documentation 1: hydrophobic treatments is implemented on the surface of optics, so that water droplet is difficult on the opticses such as object lens attached to photographic optical system, even and adhered to water droplet and also can remove simply.And disclose following camera head in patent documentation 2: it has wiper on lens barrier, when lens barrier is opened or be closed, by the surface of wiper wiping lens protection glass (lens cover glass).
[patent documentation 1] Japanese kokai publication hei 5-232566 communique
[patent documentation 2] TOHKEMY 2003-219237 communique
By hydrophobic treatments, split and become drops attached to the water on optical element etc.The above water droplet of pre-sizing falls from camera head owing to conduct oneself with dignity, and can remove attached to the water droplet on the optical element.But even big flood drippage down, little water droplet also still on the surface attached to optical element, is difficult to remove.Consider to utilize wiper etc. to wipe this little water droplet away, still, because wiper mechanically contact with the surface of optical element, so possible injured surface is not preferred.
Summary of the invention
The present invention finishes in light of this situation, and its purpose is, the lip-deep water that can remove attached to optical element is provided, with the dysgenic camera head that prevents to cause attached to the water on the optical element surface.
In order to reach above-mentioned purpose; the camera head that first aspect relates to has: guard block; it has makes light beam incide the plane of incidence of photographic optical system; can and cover between the make-position of the above-mentioned plane of incidence at the open position that opens wide this plane of incidence and move; be positioned at when being in above-mentioned open position from the above-mentioned plane of incidence and leave on the position of incident direction of above-mentioned light beam; the surface of the above-mentioned plane of incidence has hydrophobicity, above-mentioned guard block with the opposed opposed faces possess hydrophilic property of the above-mentioned plane of incidence.
And; the camera head that second aspect relates to is; in above-mentioned first aspect, the distance between the opposed faces of the above-mentioned guard block when above-mentioned guard block is in above-mentioned make-position and the above-mentioned plane of incidence is shorter than the entrance pupil diameter dimension of above-mentioned photographic optical system.
And then; the camera head that the third aspect relates to is; in above-mentioned first aspect; above-mentioned photographic optical system is a variable-power optical system, and the distance between the opposed faces of the above-mentioned guard block when above-mentioned guard block is in above-mentioned make-position and the above-mentioned plane of incidence is shorter than the entrance pupil diameter dimension of the wide-angle side of above-mentioned photographic optical system.
And then the camera head that fourth aspect relates to is, in above-mentioned first aspect, this camera head has exterior member, this exterior member keeps constituting the optics of the above-mentioned plane of incidence, and has the circumference that surrounds above-mentioned optics edge, and above-mentioned optics is more outstanding than above-mentioned circumference.
And then the camera head that the 5th aspect relates to is, in above-mentioned first aspect, this camera head is provided with the water route, and this water route is used to discharge hydrophilic water that is absorbed by above-mentioned guard block.
According to the present invention, the surface of the plane of incidence of photographic optical system has hydrophobicity, with the opposed opposed faces possess hydrophilic property of this plane of incidence, therefore, can provide the camera head that can remove attached to the water on the optical element surface.
Description of drawings
Fig. 1 is the sectional view of exterior body of the face that comprises photographic optical system of the digital camera of an embodiment of the invention.
Fig. 2 is the cover glass figure on every side that the digital camera of an embodiment of the invention is shown.
Fig. 3 illustrates the baffle plate of digital camera of an embodiment of the invention and the figure in water route.
Fig. 4 is that the water droplet that an embodiment of the invention are shown is removed the key diagram of action.
Fig. 5 is the figure that the relation of the photographic optical system of an embodiment of the invention and drop size is shown.
Symbol description
1: digital camera; 3: lens; 4: prism 5: optical unit; 10: adorn main body outward; 11: cover glass 11a: the plane of incidence; 12a: circumference 13a, 13b: boundary vicinity; 14a, 14b: inclined-plane; 15: the water route; 15a, 15b: rib 21: baffle plate 21a: opposed faces; 21b: baffle portion; 21c: arm; 21d: center of rotation; 23: decorative panel; 25: the barrier driving space; 31,32,33,34: water droplet; 36: the entrance pupil position.
Embodiment
Below, with reference to the accompanying drawings, use has been used digital camera of the present invention preferred implementation has been described.This digital camera is following digital camera: will be converted to picture signal by the shot object image of image pickup optical system imaging by imaging apparatus, and will be in recording medium based on the Imagery Data Recording of this picture signal.
Fig. 1 is the sectional view of exterior body of the face that comprises photographic optical system of the digital camera 1 of an embodiment of the invention, and this sectional view is the sectional view along the A-A line among Fig. 3 described later.Outer dress main body 10 is configured to, and covers to comprise lens 3 and the prism 4 inner structure body at interior optical unit 5 etc.Lens 3 are configured for shot object image is carried out the photographic optical system of imaging with the not shown lens in the optical unit 5.Prism 4 is to be used for the light path of the photographic optical system optics to the below bending of disposing imaging apparatus.In addition, in Fig. 1, adorn 10 left sides that cover the inner structure body of main body outward, but cover the right side part too.
In the object side of lens 3 (paper left side), adorn outside and keeping cover glass 11 on the main body 10.That is, cover glass 11 is configured in the front of photographic optical system.This cover glass 11 is to be used to prevent that photographic optical systems such as lens 3 from directly exposing externally and the protection glass that damages.The face of the object side of cover glass 11 (being the left side in the paper) is the plane of incidence 11a that incides photographic optical system from the light beam of subject.This plane of incidence 11a is coated with the hydrophobic material as hydrophobic treatments of teflon (registered trademark), fluorine-type resin etc., has hydrophobicity.And then when water was gone up attached to this plane of incidence 11a, splitting was water droplet.At this moment, bigger than preliminary dimension water droplet falls owing to conducting oneself with dignity.In addition, be not limited to above-mentioned this hydrophobic coating, plane of incidence 11a also can improve the processing to water contact angle, for example, water contact angle is at least more than 90 °, is preferably more than 100 °.
Adorn outside on the extended line of circumference 12a on the main body 10 and inclined-plane 14b, as shown in Figure 3, be provided with the water route 15 that is used to discharge the water droplet of wiping away by baffle plate 21 described later.Be provided with rib 15a, 15b in the both sides in this water route 15, the height of this rib 15a, 15b is the degree that contacts with the surface of baffle plate 21.And the end in water route 15 leads to the gap of decorative panel 23 described later and outer dress main body 10.In addition, rib 15a, 15b be in order to prevent baffle plate 21 contact protection glass 11 when baffle plate 21 is in the close position, and make baffle plate 21 and plane of incidence 11a keep necessary interval, the function of the positioning element of performance baffle plate 21.
Object side (paper left side) at cover glass 11 leaves preset distance W arrangement of baffles 21.As shown in Figure 3, baffle plate 21 is made of baffle portion 21b, arm 21c and center of rotation 21d.Baffle plate 21 comprises lens 3 in covering and rotates freely between the make-position (solid line position of Fig. 3) of interior photographic optical system and open position (the dashdotted position of Fig. 3) that photographic optical system is exposed.Rib 15a, the 15b in described water route 15 is along the slewing area setting of the baffle portion 21b of this baffle plate 21.
Implemented hydrophilic coating with the opposed faces 21a of the opposed baffle plate 21 of plane of incidence 11a of cover glass 11.As hydrophilic treatment is hydrophilic coating, is coated with materials such as titanium dioxide, when attached to the water droplet on the plane of incidence 11a contact opposed faces 21a, is absorbed and moves to opposed faces 21a from plane of incidence 11a.In addition, opposed faces 21a is not limited to above-mentioned this hydrophilic coating, also can reduce the processing to water contact angle, for example, water contact angle is at least below 40 °, is preferably below 20 °.
The outside of baffle plate 21 and outer dress main body 10 grades disposes metal decorative panel 23.Decorative panel 23 and outside adorn between the main body 10, obtain baffle plate 21 and rotate the required enough spaces (barrier driving space 25) and the space of water route 15 usefulness.
Then, use Fig. 4 that the removal action of water droplet is described.Fig. 4 (A) illustrates the state that baffle plate 21 is shown in an open position, and in the surface attachment of cover glass 11 water droplet 31 is arranged.As mentioned above, because the plane of incidence 11a on cover glass 11 surfaces has implemented hydrophobic coating, so water droplet 31 splits easily, the very heavy water droplet of conduct oneself with dignity is owing to gravity falls, still than its little water droplet still attached to the surface of cover glass 11.
Under this state, baffle plate 21 moves (M1 direction among the figure) in order to protect photographic optical system to make-position, becomes the baffle plate closure state shown in Fig. 4 (B).When under this state, when the apex portion of water droplet 32 contacted with the opposed faces 21a of baffle plate 21, water droplet 32 was absorbed by the opposed faces 21a of baffle plate 21, and from cover glass 11 to baffle plate 21 side shiftings.
When from the baffle plate closure state baffle plate 21 being moved to the M2 direction in order to photograph action; when becoming the baffle plate open mode; shown in Fig. 4 (C), the water droplet 32 on the cover glass 11 is absorbed and removes, and the water droplet 33 on opposed faces 21a surface becomes the whole state that is diffused into.Baffle plate 21 stops in the position shown in the dotted line of Fig. 3, and still, this moment is owing to stopping rapidly, so the water droplet 33 on the opposed faces 21a of baffle plate 21 is discharged to the outside of digital camera 1 because of inertial force splashes by water route 15.
Then, use Fig. 5 that the distance, delta h (being W among Fig. 1) between the plane of incidence 11a of the opposed faces 21a of baffle plate 21 and cover glass 11 is described.Fig. 5 is the structural drawing of the photographic optical system of digital camera 1, the configuration of the lens when (A) focal length being shown and being in wide-angle side, the configuration of the lens when (B) focal length being shown being in telescope end.
Now, when on cover glass 11, existing than entrance pupil diameter (wide-angle side: φ D
WTelescope end: φ D
T) big water droplet 34 (diameter: in the time of φ d), can't obtain good imaging.On the contrary, if be
φD＞φd
The then part of light beam imaging well.Here, if for example be
φd＝(1/2)·φD
Then 3/4 of the light beam influence that is not subjected to water droplet 34, imaging well.
When phtographic lens was zoom lens, the entrance pupil diameter of general wide-angle side was less, that is,
φD
W＜φD
T
So, the entrance pupil diameter D of use wide-angle side
W, the distance, delta h that sets between the plane of incidence 11a of the opposed faces 21a of baffle plate 21 and cover glass 11 gets final product.
For example, in wide-angle side, if establishing focal length is that f, f-number are FNo., then at f=6.7mm, under the situation of FNo.=3.5, usually, φ D
WAbout=1.9mm, therefore, make distance, delta h be that 1mm is following and get final product.And, if be
φd＝(1/4)·φD
Then can absorb littler water droplet, can reduce the influence of water droplet by opposed faces 21a.Under this situation, distance, delta h is below the 0.5mm.And this distance, delta h is for the contact damage of anti-baffle plate 21 with respect to the plane of incidence 11a of cover glass 11, as long as there is the movable interval of baffle plate 21, can be minimal interval.That is, as mentioned above, can be 1mm 〉=Δ h＞0, or 0.5mm 〉=Δ h＞0.
As described above, in embodiments of the present invention, be provided with: cover glass 11, it has to incide and comprises the plane of incidence of lens 3 in interior photographic optical system; And baffle plate 21; it can and cover between the make-position of the plane of incidence at the open position of the plane of incidence that opens wide cover glass 11 and move; be positioned at when being shown in an open position from the position that the plane of incidence leaves; hydrophobic hydrophobic coating has been implemented to have in the surface of the plane of incidence of cover glass 11; on the other hand, baffle plate 21 has implemented the hydrophilic coating of possess hydrophilic property with the opposed opposed faces of the plane of incidence.Therefore, the water droplet that splits on hydrophobic coating is absorbed by hydrophilic coating, can be from the surface removal water droplet of cover glass 11.
And in embodiments of the present invention, the distance between the plane of incidence of the opposed faces of the baffle plate when baffle plate 21 is in the close position and cover glass 11 is shorter than the entrance pupil diameter dimension of photographic optical system.Therefore, can remove the water droplet that captured image is brought dysgenic size.
And then; in embodiments of the present invention; in photographic optical system is under the situation of zoom lens (variable-power optical system), and the distance between the opposed faces of the baffle plate 21 when baffle plate 21 is in the close position and the plane of incidence of cover glass 11 is shorter than the entrance pupil diameter dimension of the wide-angle side of photographic optical system.Therefore, even photographic optical system is the camera lens of variable-focus, also can remove the water droplet that the image of bat picture is brought dysgenic size.
And then in embodiments of the present invention, exterior member 10 keeps cover glass 11, and cover glass 11 is more outstanding than circumference 12a.Therefore, can not accumulate in both boundary vicinity 13a, 13b outward, and flow to the below attached to cover glass 11 or the water droplet adorned on the main body 10.This structure has been not limited to make up the situation of the hydrophobic coating and the hydrophilic coating of present embodiment, even use separately, also can bring into play effect.
That is, in camera heads such as digital camera in the past, therefore the holding member indentation configuration of the optical element that exposes by it is kept, exist in the unfavorable condition that its recess part is accumulated water droplet easily.Particularly using baffle plate or wiper to remove under the situation attached to the water droplet on the optical element, existing in water droplet that recess partly accumulates once more attached to the problem on the optical element.As present embodiment, it is kept than holding member (adorning main body 10 outward) is outstanding by making optical element (cover glass 11), thereby can eliminate this unfavorable condition.
And, in embodiments of the present invention, be provided with the water route 15 that is used to discharge the water that the hydrophilic coating by baffle plate 21 absorbs.Therefore, do not worry getting back to once more the surface of cover glass 11 by the water that hydrophilic coating absorbs.
In addition, in embodiments of the present invention, the optical element as optics that exposes externally is a cover glass 11, but is not limited thereto, and for example, can certainly be the lens that constitute the part of photographic optical system.And baffle plate 21 is that rotate at the center with center of rotation 21d, but is not limited thereto, and also can be the type that goes up inferior slip.And then, on the baffle plate 21 that the light path that is used for photographic optical system opens and closes, hydrophilic coating is set, but hydrophilic coating is not limited thereto, so long as water droplet is removed the wiper etc. of the special use of usefulness, the opposed faces of face that water droplet adheres to gets final product.
In the explanation of embodiments of the present invention, enumerated general small digital camera as an example, but be not limited thereto, also can be applied in the various camera heads such as camera built-in in the electronic equipments such as digital single-lens reflex camera, portable phone certainly.
Claims (5)
1. camera head, this camera head have at the make-position of the front that covers photographic optical system and the guard block from moving between the position of keeping out of the way previously of photographic optical system, it is characterized in that,
This camera head possesses optics; this optics is arranged on the front of above-mentioned photographic optical system; on the plane of incidence of the object side of this optics, implemented hydrophobic treatments, above-mentioned guard block be implemented hydrophilic treatment with the opposed opposed faces of the above-mentioned plane of incidence.
2. camera head according to claim 1 is characterized in that,
Distance between the opposed faces of the above-mentioned guard block when above-mentioned guard block is in above-mentioned make-position and the above-mentioned plane of incidence is shorter than the entrance pupil diameter dimension of above-mentioned photographic optical system.
3. camera head according to claim 1 is characterized in that,
Above-mentioned photographic optical system is a variable-power optical system, and the distance between the opposed faces of the above-mentioned guard block when above-mentioned guard block is in above-mentioned make-position and the above-mentioned plane of incidence is shorter than the entrance pupil diameter dimension of the wide-angle side of above-mentioned photographic optical system.
4. camera head according to claim 1 is characterized in that,
This camera head has exterior member, and this exterior member keeps constituting the optics of the above-mentioned plane of incidence, and has the circumference at the edge that surrounds above-mentioned optics, and above-mentioned optics is more outstanding than above-mentioned circumference.
5. camera head according to claim 1 is characterized in that,
This camera head is provided with the water route, and this water route is used to discharge hydrophilic water that is absorbed by above-mentioned guard block.
Applications Claiming Priority (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP2007011471 | 2007-01-22 | ||
| JP2007011471A JP4885746B2 (en) | 2007-01-22 | 2007-01-22 | Imaging device |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN101231447A CN101231447A (en) | 2008-07-30 |
| CN100592191C true CN100592191C (en) | 2010-02-24 |
Family
ID=39703256
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN200710197078A Expired - Fee Related CN100592191C (en) | 2007-01-22 | 2007-12-06 | Image pickup device |
Country Status (2)
| Country | Link |
|---|---|
| JP (1) | JP4885746B2 (en) |
| CN (1) | CN100592191C (en) |
Families Citing this family (10)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US20130136436A1 (en) * | 2011-11-25 | 2013-05-30 | Panasonic Corporation | Camera cover and camera |
| JP5756818B2 (en) * | 2013-01-10 | 2015-07-29 | 富士重工業株式会社 | Imaging device for installation outside the vehicle |
| JP2015035722A (en) * | 2013-08-09 | 2015-02-19 | 市光工業株式会社 | On-vehicle camera |
| EP2923990B1 (en) | 2014-03-28 | 2018-01-03 | Konecranes Global Corporation | Optical measurement device, load handling apparatus, method for protecting optical measurement device and method for updating load handling apparatus |
| EP3171217B1 (en) * | 2015-11-17 | 2017-10-25 | Axis AB | Camera cover glass unit with water removal function |
| JP2017170303A (en) * | 2016-03-22 | 2017-09-28 | オリンパス株式会社 | Droplet removal device, imaging device having droplet removal device, control method of droplet removal device, and control program of droplet removal device |
| US10363326B2 (en) | 2017-07-12 | 2019-07-30 | Ford Global Technologies, Llc | Self-cleaning sensor surface |
| CN107249094B (en) * | 2017-07-31 | 2019-10-25 | 重庆三朵蜜生物技术有限公司 | A kind of movies-making video camera |
| JP7424557B2 (en) | 2019-12-18 | 2024-01-30 | 株式会社東海理化電機製作所 | Vehicle camera device |
| CN111367134B (en) * | 2020-04-21 | 2021-11-23 | 湖南镭目科技有限公司 | Camera protection device |
Family Cites Families (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS59131725A (en) * | 1983-01-17 | 1984-07-28 | Toyota Motor Corp | Intake-air controlling apparatus |
| JPS6479031A (en) * | 1987-09-19 | 1989-03-24 | Ishizuka Glass | Method for cutting moil by laser beam |
| JPH08152287A (en) * | 1994-11-29 | 1996-06-11 | Sanyo Electric Co Ltd | Heat exchanger |
| JP2002032891A (en) * | 2000-07-13 | 2002-01-31 | Matsushita Electric Ind Co Ltd | Vehicle detecting device |
| JP2002079880A (en) * | 2000-09-06 | 2002-03-19 | Auto Network Gijutsu Kenkyusho:Kk | Vehicle periphery visually confirming device |
| JP2003078788A (en) * | 2001-08-31 | 2003-03-14 | Hitachi Kokusai Electric Inc | Outdoor use television camera |
| JP4147914B2 (en) * | 2002-11-25 | 2008-09-10 | ソニー株式会社 | Imaging device |
-
2007
- 2007-01-22 JP JP2007011471A patent/JP4885746B2/en not_active Expired - Fee Related
- 2007-12-06 CN CN200710197078A patent/CN100592191C/en not_active Expired - Fee Related
Also Published As
| Publication number | Publication date |
|---|---|
| JP4885746B2 (en) | 2012-02-29 |
| CN101231447A (en) | 2008-07-30 |
| JP2008176207A (en) | 2008-07-31 |
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| SE01 | Entry into force of request for substantive examination | ||
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| C41 | Transfer of patent application or patent right or utility model | ||
| TR01 | Transfer of patent right |
Effective date of registration: 20151119 Address after: Tokyo, Japan, Japan Patentee after: Olympus Corporation Address before: Tokyo, Japan Patentee before: Olympus Imaging Corp. |
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| CF01 | Termination of patent right due to non-payment of annual fee | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20100224 Termination date: 20191206 |