CN107678078A - The manufacture method of camera device, lens cap and lens cap - Google Patents
The manufacture method of camera device, lens cap and lens cap Download PDFInfo
- Publication number
- CN107678078A CN107678078A CN201710646140.XA CN201710646140A CN107678078A CN 107678078 A CN107678078 A CN 107678078A CN 201710646140 A CN201710646140 A CN 201710646140A CN 107678078 A CN107678078 A CN 107678078A
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- China
- Prior art keywords
- coating film
- camera device
- lens cap
- hydrophilic coating
- lens
- Prior art date
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Classifications
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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
- G03B11/00—Filters or other obturators specially adapted for photographic purposes
- G03B11/04—Hoods or caps for eliminating unwanted light from lenses, viewfinders or focusing aids
- G03B11/043—Protective lens closures or lens caps built into cameras
-
- G—PHYSICS
- G02—OPTICS
- G02B—OPTICAL ELEMENTS, SYSTEMS OR APPARATUS
- G02B1/00—Optical elements characterised by the material of which they are made; Optical coatings for optical elements
- G02B1/10—Optical coatings produced by application to, or surface treatment of, optical elements
- G02B1/18—Coatings for keeping optical surfaces clean, e.g. hydrophobic or photo-catalytic films
-
- 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
- G03B11/00—Filters or other obturators specially adapted for photographic purposes
- G03B11/04—Hoods or caps for eliminating unwanted light from lenses, viewfinders or focusing aids
- G03B11/045—Lens hoods or shields
-
- 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
- G03B17/08—Waterproof bodies or housings
-
- 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
- G03B17/55—Details of cameras or camera bodies; Accessories therefor with provision for heating or cooling, e.g. in aircraft
-
- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04N—PICTORIAL COMMUNICATION, e.g. TELEVISION
- H04N23/00—Cameras or camera modules comprising electronic image sensors; Control thereof
- H04N23/50—Constructional details
- H04N23/51—Housings
-
- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04N—PICTORIAL COMMUNICATION, e.g. TELEVISION
- H04N7/00—Television systems
- H04N7/18—Closed-circuit television [CCTV] systems, i.e. systems in which the video signal is not broadcast
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- Physics & Mathematics (AREA)
- General Physics & Mathematics (AREA)
- Engineering & Computer Science (AREA)
- Multimedia (AREA)
- Signal Processing (AREA)
- Aviation & Aerospace Engineering (AREA)
- Chemical & Material Sciences (AREA)
- Optics & Photonics (AREA)
- Chemical Kinetics & Catalysis (AREA)
- Studio Devices (AREA)
- Surface Treatment Of Optical Elements (AREA)
- Accessories Of Cameras (AREA)
- Application Of Or Painting With Fluid Materials (AREA)
Abstract
Technical problem：The present invention provides the lens cap used in a kind of camera device for the image that can further suppress the condensation of lens cap medial surface and preferably obtain target area, the camera device and the manufacture method of the lens cap.Solution：Camera device (1) possesses：Imaging sensor (20), lens (10), the lens cap (310) from outer side covers lens (10) for the light from target area is imaged on the image sensor.Medial surface in lens (10) side of lens cap (310), using the hydrophilic coating film forming agent containing volatile hydrophilic compounds (saturated vapour pressure (20 DEG C) is more than 15mmHg below 40mmHg) formed with hydrophilic coating film, turn into the state that compound is volatilized from the surface of hydrophilic coating film.
Description
Technical field
The present invention relates to the lens cap used in a kind of camera device imaged to target area, the camera device with
And for manufacturing the manufacture method of the lens cap.
Background technology
The monitoring camera device that the situation at known You Dui streets, crossing etc. is imaged.Shot by this camera device
Image such as the inspection available for traffic accident.When examining, the situation of vehicle and pedestrian, semaphore can confirm that
Bright light situation etc..Camera device not only images on daytime to target area, and also target area is entered at the night of post sunset
Row shooting.
In this camera device, lens cap is installed in a manner of from outer side covers lens, the lens cap is used to protect
Lens, the lens capture the light of target area.In this case, may due to the temperature difference inside device and outside device
Condensation is produced in the inner side of lens cap.If producing condensation so on lens cap, can be ingested photographed images due to condensation, and
Lead to not well image target area.
In following patent document 1~3, describe and hydrophilic treated is implemented to the medial surface of lens cap or forms parent
Water-based film solves the method for above-mentioned condensation trouble.
Prior art literature
Patent document
Patent document 1：Japanese Patent Publication 2013-218114 publications
Patent document 2：Japanese Patent Publication 2008-239017 publications
Patent document 3：Japanese Patent Publication 2002-350966 publications
The content of the invention
(1) technical problems to be solved
If as described above, implementing hydrophilic treated to the medial surface of lens cap or forming hydrophilic film, then can make because of knot
Reveal and be attached to the water droplet on medial surface and spread on medial surface, it is taken as that photographed images can be improved.
However, the research according to the present inventor, it is thus identified that：Even in feelings of the medial surface formed with hydrophilic film of lens cap
Under condition, compared with the situation of no condensation, photographed images are also very unintelligible.It may thus be appreciated that：Camera device is being used as described above
In the case of purpose is monitored, it is possible to lead to not the feelings of the suitably inspection of carry out accident etc. because of this fogging image
Condition.
In view of the problem, it is an object of the present invention to provide a kind of condensation that can further suppress lens cap medial surface
And preferably obtain the lens cap used in the camera device of the image of target area, the camera device and the system of the lens cap
Make method.
(2) technical scheme
Present inventor has performed conscientiously studying, as a result find：By being included and water in the solvent of dilution hydrophilic material
Compatibility (hydrophily) it is high and there are volatile compound (hereinafter referred to as volatile hydrophilic compounds, for example, isopropyl
Alcohol) hydrophilic coating film is formed, it can effectively suppress the condensation on the inside of lens cap.
The first aspect of the present invention is related to a kind of camera device.The camera device of present aspect possesses：Imaging sensor, make to come
The lens and the lens cap from lens described in outer side covers being imaged from the light of target area in described image sensor.This
In, the medial surface in the lens side of the lens cap, formed with containing volatile hydrophilic compounds (saturated vapour pressure
(20 DEG C) are more than 15mmHg below 40mmHg (being preferably more than 25mmHg below 35mmHg).It is same as below) hydrophily quilt
Film, turn into the state that volatile hydrophilic compounds volatilize from the surface of the hydrophilic coating film.
According to the camera device of present aspect, waved because being formed in the hydrophilic coating film of the medial surface of lens cap containing above-mentioned
The hydrophilic compounds of hair property, so it is caused by condensing to suppress lens cap medial surface by the effect of the compound
It is fuzzy.That is, because the compatibility of volatile hydrophilic compounds and water contained by hydrophilic coating film is high and have volatility,
So volatile hydrophilic compounds can with because of condensation and caused by water droplet mix in the state of volatilize so that water droplet
Sectionalization.The fine liquid particles being so segmented can evaporate in the inside of camera device, in addition, a portion is not evaporated and residual
Stay in camera device, and be attached to the medial surface of lens cap.But because the water droplet of attachment is quite tiny water droplet, institute
That can spread thinner in the hydrophilic coating film for being formed at medial surface surface.Therefore, it is possible to suppress the fuzzy of medial surface, well
Ensure the visuality of photographed images.
The camera device of present aspect is for example using the containing ratio that volatile hydrophilic compounds are isopropanol
Less than more than 10% 80% hydrophilic coating film forming agent and form the hydrophilic coating film.According to the structure, by following implementation
Inspection in mode is understood：The condensation on lens cap medial surface can be suppressed, so as to effectively improve the image quality of photographed images.Cause
This, by camera device for monitoring purposes in the case of, be also capable of the inspection of suitably carry out accident etc..
Preferably, in this case, the containing ratio of the isopropanol in the hydrophilic coating film forming agent is more than 15%
Less than 60%.If so, then from the inspection in embodiment：The knot on lens cap medial surface can more effectively be suppressed
Dew, so as to significantly more improve the image quality of photographed images.
In addition, in this case, it is further preferred that the containing ratio of the isopropanol in the hydrophilic coating film forming agent is
Less than more than 20% 40%.If so, then from the inspection in embodiment：Lens cap can effectively further be suppressed
Condensation on medial surface, so as to by the image quality of photographed images improve to the situation identical degree without condensation.
In the camera device of present aspect, it is preferable that the lateral surface in the opposite side of the lens of the lens cap, also make
With the hydrophilic coating film forming agent containing volatile hydrophilic compounds formed with hydrophilic coating film.If so, then due to
Condensation on the lateral surface of lens cap is also suppressed, so as to further improve the image quality of photographed images.In addition, in the situation
Under, also as described above, isopropanol can be used as volatile hydrophilic compounds.In addition, in this case, isopropyl
Alcohol is preferably less than more than 10% 80%, more preferably more than 15% relative to the containing ratio of hydrophilic coating film forming agent
Less than 60%, it is still more preferably less than more than 20% 40%.
Preferably, the camera device of present aspect is also equipped with the heating of the temperature of the medial surface for improving the lens cap
Device.If so, near the medial surface of lens cap, it is segmented because of the effect of volatile hydrophilic compounds
Water droplet is easier to evaporate, and adheres to so as to suppress the water droplet on the medial surface of lens cap.
The second aspect of the present invention is related to a kind of for covering and protecting the lens cap of lens.The lens cap of present aspect uses
Hydrophilic coating film forming agent containing volatile hydrophilic compounds the lens side medial surface formed with hydrophily quilt
Film, turn into the state that volatile hydrophilic compounds volatilize from the surface of the hydrophilic coating film.
By the way that the lens cap of present aspect is used for into camera device, the effect same with above-mentioned first aspect can be realized.
In addition, in present aspect, also in the same manner as above-mentioned first aspect, isopropanol can be used as volatile hydrophilic
Property compound.In addition, in this case, isopropanol is preferably more than 10% relative to the containing ratio of hydrophilic coating film forming agent
Less than 80%, more preferably less than more than 15% 60%, it is still more preferably less than more than 20% 40%.
The third aspect of the present invention is related to a kind of for the manufacture method for the lens cap for covering and protecting lens.Present aspect
The manufacture method of lens cap contains：By the hydrophilic coating film forming agent containing volatile hydrophilic compounds be coated on it is transparent and
Process on the side at least relative with the lens of plate-like matrix part and form the hydrophilic coating film of coating
The process that agent is dried.Hydrophilic coating film forming agent contains：For forming the hydrophilic material of hydrophilic coating film (for example, amorphous
Silica) and for dispersing or dissolving the solvent of hydrophilic material, volatile hydrophilic compounds play solvent
Effect, also have residual in hydrophilic coating film.For the hydrophilic coating film forming agent used in the present invention, as solvent,
In addition to volatile hydrophilic compounds, it can contain：Volatile hydrophily chemical combination described in saturated vapor pressure ratio
Low solvent (the normal propyl alcohol of volatile hydrophilic compounds described in the high solvent of thing (methanol, ethanol etc.), saturated vapor pressure ratio
Deng).In the drying process, at least a portion volatilization of the higher solvent of saturated vapour pressure.
By the way that the lens cap manufactured using the manufacture method of present aspect is used for into camera device, can realize and above-mentioned first
The same effect of aspect.
In addition, in present aspect, also in the same manner as above-mentioned first aspect, isopropanol can be used as volatile hydrophilic
Property compound.In addition, in this case, isopropanol is preferably more than 10% relative to the containing ratio of hydrophilic coating film forming agent
Less than 80%, more preferably less than more than 15% 60%, it is still more preferably less than more than 20% 40%.
In the present invention, can the use of saturated vapour pressure (20 DEG C) be 15mmHg as volatile hydrophilic compounds
Below above 40mmHg hydrophilic compounds, it is more than 25mmHg 35mmHg to be preferably able to using (20 DEG C) of saturated vapour pressure
Following hydrophilic compounds (being specially isopropanol).It is residual in hydrophilic coating film with being difficult to if saturated vapour pressure is too high
The tendency stayed, if saturated vapour pressure is too low, there is the tendency being difficult to from hydrophilic coating film volatilization.
(3) beneficial effect
According to the present invention, as described above, it is possible to a kind of condensation that can further suppress lens cap medial surface is provided and more
The lens cap used in the camera device of the image of target area, the camera device and the manufacturer of the lens cap are obtained well
Method.
The effect for making the present invention and meaning are more understood by the explanation of embodiment as shown below.But following institute
The embodiment shown is only illustration when by implementationization of the invention, and the present invention is not by content described in following embodiment
Any restrictions.
Brief description of the drawings
(a) in Fig. 1 is the figure of the surface structure for the image management system for representing embodiment.(b) in Fig. 1 is to represent
The figure of one of the photographed images of embodiment.(c) in Fig. 1 is the lens barrel for the camera device for schematically showing embodiment
The figure of the structure of front side.
Fig. 2 is the sectional view of the structure for the camera device for representing embodiment.
(a) in Fig. 3 is the flow chart of the formation process for the hydrophilic coating film for representing embodiment.(b), (c) in Fig. 3
It is the figure of the manufacturing process for the lens cap for schematically showing embodiment.
(a)~(d) in Fig. 4 is that the condensation of the hydrophilic coating film for the lens cap for schematically showing embodiment suppresses to make
Figure.
(a) in Fig. 5 be represent comparative example 1 (no hydrophilic coating film) make in the environment of -10 DEG C camera device on one side
After action is while place 1 hour, the photo of the state on the preceding surface of camera device after just taking out to normal temperature.Fig. 5
In (b) be the figure obtained with the camera device actual photographed landscape after just the taking out to normal temperature of comparative example 1
Picture.(c) in Fig. 5 is in the environment of taking-up to the normal temperature for representing comparative example 1 and the preceding surface of camera device after 5 minutes
The photo of state.
(a) in Fig. 6 be represent comparative example 2 (have hydrophilic coating film, and be not added with isopropanol) in -10 DEG C of environment
Under act camera device while placing 1 hour after, the preceding surface of camera device after just taking out to normal temperature
State photo.(b) in Fig. 6 is clapped with the camera device after just the taking out to normal temperature of comparative example 2 is actual
The image taken the photograph landscape and obtained.(c) in Fig. 6 is in the environment of taking-up to the normal temperature for representing comparative example 2 and after 5 minutes
The photo of the state on the preceding surface of camera device.
(a) in Fig. 7 is to represent (the basic envelope forming agent of embodiment 1：Isopropanol (weight ratio)=2：1) at -10 DEG C
In the environment of act camera device while placing 1 hour after, the camera device after just taking out to normal temperature
The photo of the state on preceding surface.(b) in Fig. 7 is with the camera device after just the taking out to normal temperature of embodiment 1
Actual photographed landscape and the image obtained.(c) in Fig. 7 is in the environment of taking-up to the normal temperature for representing embodiment 1 and passes through 5 points
The photo of the state on the preceding surface of camera device after clock.
(a) in Fig. 8 is to represent (the basic envelope forming agent of embodiment 2：Isopropanol (weight ratio)=1：1) at -10 DEG C
In the environment of act camera device while placing 1 hour after, the camera device after just taking out to normal temperature
The photo of the state on preceding surface.(b) in Fig. 8 is with the camera device after just the taking out to normal temperature of embodiment 2
Actual photographed landscape and the image obtained.(c) in Fig. 8 is in the environment of taking-up to the normal temperature for representing embodiment 2 and passes through 5 points
The photo of the state on the preceding surface of camera device after clock.
(a) in Fig. 9 is to represent (the basic envelope forming agent of embodiment 3：Isopropanol (weight ratio)=1：2) at -10 DEG C
In the environment of act camera device while placing 1 hour after, the camera device after just taking out to normal temperature
The photo of the state on preceding surface.(b) in Fig. 9 is with the camera device after just the taking out to normal temperature of embodiment 3
Actual photographed landscape and the image obtained.(c) in Fig. 9 is in the environment of taking-up to the normal temperature for representing embodiment 3 and passes through 5 points
The photo of the state on the preceding surface of camera device after clock.
(a) in Figure 10 is to represent (the basic envelope forming agent of embodiment 4：Isopropanol (weight ratio)=1：3) at -10 DEG C
In the environment of act camera device while placing 1 hour after, the camera device after just taking out to normal temperature
The photo of the state on preceding surface.(b) in Figure 10 is with the camera device after just the taking out to normal temperature of embodiment 4
Actual photographed landscape and the image obtained.(c) in Figure 10 is in the environment of taking-up to the normal temperature for representing embodiment 4 and by 5
The photo of the state on the preceding surface of camera device after minute.
(a) in Figure 11 is to represent (the basic envelope forming agent of embodiment 5：Isopropanol (weight ratio)=4：1) at -10 DEG C
In the environment of act camera device while placing 1 hour after, the camera device after just taking out to normal temperature
The photo of the state on preceding surface.(b) in Figure 11 is with the camera device after just the taking out to normal temperature of embodiment 5
Actual photographed landscape and the image obtained.(c) in Figure 11 is in the environment of taking-up to the normal temperature for representing embodiment 5 and by 5
The photo of the state on the preceding surface of camera device after minute.
(a) in Figure 12 is to represent (the basic envelope forming agent of embodiment 6：Isopropanol (weight ratio)=7：1) at -10 DEG C
In the environment of act camera device while placing 1 hour after, the camera device after just taking out to normal temperature
The photo of the state on preceding surface.(b) in Figure 12 is with the camera device after just the taking out to normal temperature of embodiment 6
Actual photographed landscape and the image obtained.(c) in Figure 12 is in the environment of taking-up to the normal temperature for representing embodiment 6 and by 5
The photo of the state on the preceding surface of camera device after minute.
(a) in Figure 13 is to represent (the basic envelope forming agent of embodiment 7：Isopropanol (weight ratio)=9：1) at -10 DEG C
In the environment of act camera device while placing 1 hour after, the camera device after just taking out to normal temperature
The photo of the state on preceding surface.(b) in Figure 13 is with the camera device after just the taking out to normal temperature of embodiment 7
Actual photographed landscape and the image obtained.(c) in Figure 13 is in the environment of taking-up to the normal temperature for representing embodiment 7 and by 5
The photo of the state on the preceding surface of camera device after minute.
Embodiment
Then, embodiments of the present invention are illustrated referring to the drawings.
(a) in Fig. 1 is the figure of the surface structure for the image management system for representing embodiment.
As shown in (a) in Fig. 1, image management system possesses camera device 1 and external device (ED) 2.Camera device 1 is monitoring
Video camera, it is arranged in a manner of it can be imaged to the road including semaphore, crossing etc. and thing 3 is set.Thing 3 is set
The e.g. outer wall of building etc., the structure on roof, electric pole etc..The image of shooting is recorded in interior by camera device 1 at any time
In the record media in portion.External device (ED) 2 is pocket pc.In addition, external device (ED) 2 can also be mobile phone, flat board
Other portable information terminating machines such as computer.
The image being recorded in camera device 1 is easy to recycle appropriately to external device (ED) 2.Camera device 1 and the energy of external device (ED) 2
Enough communicated by WLAN.External device (ED) 2 establishes communication path by WLAN, and image is downloaded from camera device 1.Take the photograph
As the communication between device 1 and external device (ED) 2 is not limited to WLAN, bluetooth (registration mark) etc. can also be used other logical
Letter mode.
(b) in Fig. 1 is the figure of one for representing the photographed images with the shooting of camera device 1.Here, semaphore will be included
4 crossing 5 is set as target area.For convenience, in (b) in Fig. 1, illustrate only towards the direction of camera device 1
Semaphore 4.By the image that camera device 1 is shot after external device (ED) 2 is recovered to, such as it can be used for the inspection of traffic accident
Deng.In the inspection, in addition to entering the vehicle at crossing 5, the situation of pedestrian, the bright light situation of semaphore 4 can also confirm that.
I.e., it is possible to confirm that the lamp that the semaphore 4 when accident occurs lights is any color in red, green, yellow.
(c) in Fig. 1 is the figure for schematically showing the structure on front side of the lens barrel of camera device 1.
As shown in (c) in Fig. 1, camera device 1 is configured with multiple light emitting diodes 101 and one around lens 10
For the illuminance transducer 102 for the illumination for detecting target area.Under the relatively low situation of night equiluminous, light emitting diode 101
Light, illuminate target area.Light emitting diode 101 is the lighting source being illuminated by infrared light to target area.
In the front side of lens 10, the lens cap 310 (reference picture 2) for covering and protecting lens 10 is configured with.In addition,
The front side of light emitting diode 101, it is configured with the LED hood 320 (reference picture 2) for covering and protecting all light emitting diodes 101.
In addition to all light emitting diodes 101, LED hood 320 also covers illuminance transducer 102 simultaneously.
Fig. 2 is the sectional view for the internal structure for schematically showing camera device 1.The sectional view is in the light with lens 10
The section of camera device 1 is cut off in the parallel plane of axle.For convenience, only to lens barrel 11, housing 201, lid 202, supporting substrates
204th, lens cap 310, LED hood 320 and bearing 400 mark hachure.
Housing 201 has hollow drum.Covered 202 closure in the rear portion of housing 201.Lead in the front portion of housing 201
Cross bearing 400 and lens cap 310 and LED hood 320 are installed.Contained in the inside of housing 201：For driving and controlling each portion
Point circuit board unit 203, the supporting substrates 204 for supporting light emitting diode 101 and illuminance transducer 102, heating
Device 205 and the communication module 206 for being communicated with external device (ED) 2.In addition, the supply lines for supplying source power supply
207 pass through the power supply substrate connection in lid 202, with circuit board unit 203.
Lens cap 310 is by transparent and formed in the part of circular plate shape.The diameter of lens cap 310 omits than the diameter of lens 10
Greatly.As described later, the lateral surface in the 10 opposite side of medial surface and lens of the side of lens 10 of lens cap 310 is respectively formed with hydrophilic
The overlay film of property.
LED hood 320 is made up of transparent plate-shaped member.From view is overlooked, LED hood 320 has toroidal.LED
The internal diameter of cover 320 is bigger than the diameter of lens cap 310, and the external diameter of LED hood 320 is roughly the same with the internal diameter that housing 201 is overall.
Bearing 400 possesses in center：For keeping the lens cap maintaining part 401 of lens cap 310, and possess on the outside of it：
For keeping the LED hood maintaining part 402 of LED hood 320.Lens cap maintaining part 401 (is not schemed with LED hood maintaining part 402 by crane span structure portion
Show) integratedly link, the crane span structure portion passes through from the gap between light emitting diode 101 adjacent in the circumferential.
Lens cap maintaining part 401 has drum.The inner diameter area that lens cap 310 passes through embedded lens cap maintaining part 401
Domain A1, and kept by lens cap maintaining part 401.In addition, LED hood maintaining part 402 has diameter bigger than lens cap maintaining part 401
Drum.LED hood 320 by the annular section A2 between embedded lens cap maintaining part 401 and LED hood maintaining part 402, and
Kept by LED hood maintaining part 402.
Bearing 400 is embedded into the groove for the ring-type for being formed at the front side of housing 201.So, the front side of housing 201 is by lens cap
310 and LED hood 320 block.In this condition, the lens barrel 11 for keeping lens 10 is embedded with the inner side of lens cap maintaining part 401.
The medial surface of lens cap 310 is in the state in face of confined space.
In addition, the imaging sensor 20 of the side of circuit board unit 203 is configured with the position relative with lens 10.Image
Sensor 20 is for example made up of cmos image sensor.Lens 10 make shooting of the light from target area in imaging sensor 20
It is imaged on face.Light emitting diode 101 and illuminance transducer 102 are configured in the inner side of LED hood 320.
Heater 205 is used for the temperature for improving the medial surface of lens cap 310.Thus, as described later, due to hydrophilic coating film
The effect of contained volatile hydrophilic compounds (isopropanol), is segmented near the medial surface of lens cap 310
Water droplet becomes prone to evaporate.Heater 205 controls its ON/OFF by equipping in the control circuit of circuit board unit 203.Example
Such as, heater 205 is controlled as follows, i.e.,：Detection extraneous air temperature sensor detected value for 0 DEG C with
Driven in the case of lower, temperature sensor detected value more than 0 DEG C in the case of be in non-driven state.
However, in the structure shown in Fig. 2, because, with the temperature difference outside device, meeting is in lens cap 310 inside device
Inner side condenses.That is, if camera device 1 starts shooting action, the temperature inside device can be due to circuit board unit 203
Heating and rise.At this moment, if the temperature of extraneous air is lower than inside device, the air inside device can be in lens cap
310 inner side is cooled, therefore neighbouring saturated steam amount reduces, and can produce condensation in the medial surface of lens cap 310.If picture
Condensation so is produced in the medial surface of lens cap 310, then condensation can be caused to be ingested photographed images, can not be well to target area
Domain is imaged.In addition, in the case where the temperature of extraneous air is higher than the temperature inside device, due to same phenomenon,
It can be condensed in the lateral surface of lens cap 310.
Therefore, in the present embodiment, it is respectively formed with hydrophilic coating film in the medial surface and lateral surface of lens cap 310.
(a) in Fig. 3 is the flow chart for the formation process for representing hydrophilic coating film.
As shown in (a) in Fig. 3, first, in the one side of transparent and plate-like matrix part, hydrophilic coating film shape is coated with
Into agent (S101), and the hydrophilic coating film forming agent of coating is set to dry (S102).Thus, parent is formed in the single face of matrix part
Water-based envelope.Afterwards, in the another side coating hydrophilic coating film forming agent (S103) of matrix part, and cover the hydrophily of coating
Film forming agent dries (S104).So, hydrophilic coating film is formed in the another side of matrix part.In hydrophilic coating film forming agent
In drying process (S101, S104), the higher solvent of saturated vapour pressure (methanol, ethanol etc.) preferentially volatilizees, and is formed to contain and waved
The hydrophilic coating film of the hydrophilic compounds (isopropanol) of hair property.
In addition, hydrophilic coating film forming agent is, for example, by material (amorphous silica, the silane of composition hydrophilic coating film
Compound etc.) carried out dissolving with alcohols (ethanol, normal propyl alcohol, methanol etc.), propylene glycol monomethyl ether equal solvent and formed, the present invention is made
Hydrophilic coating film forming agent contains volatile hydrophilic compounds (isopropanol etc.).
(b), (c) in Fig. 3 are the figures for the manufacturing process for schematically showing lens cap 310.
In the present embodiment, will be to the hydrophilic coating film for not containing above-mentioned volatile hydrophilic compounds (isopropanol)
The hydrophilic coating film forming agent coating that volatile hydrophilic compounds form is with the addition of in forming agent (basic envelope forming agent)
In matrix part.For example, using envelope forming agent based on commercially available hydrophilic coating film forming agent, isopropanol is used
As volatile hydrophilic compounds.By because so so containing the hydrophilic coating film shape of volatile hydrophilic compounds
Into agent, as shown in (b) in Fig. 3, the upper of transparent matrix part 311 is coated on by spin-coating method and with defined thickness
Surface.
That is, matrix part 311 is installed on rotating device 6, and is rotated with fixing speed.In this condition, it is close
Water-based envelope forming agent drips to the center of matrix part 311.So, hydrophilic coating film forming agent is due to centrifugal force and in matrix
The upper surface diffusion of part 311.By so so, hydrophilic coating film forming agent being coated on into matrix part with defined thickness
311 upper surface.
Matrix part 311 is for example made up of the excellent resin material of translucency (for example, makrolon).Seen from visual angle is overlooked
Examine, matrix part 311 is shaped as circle.
After hydrophilic coating film forming agent is coated with by above-mentioned painting process, the back tender shown in (c) in Fig. 3 is carried out
Sequence.That is, matrix part 311 is placed into certain time in high temperature environments, makes the hydrophilic coating film shape of the upper surface of matrix part 311
Dried into agent because of heat.Thus, envelope forming agent (hydrophilic material) is fixed on the upper surface of matrix part 311, form rule
The hydrophilic coating film 312 of fixed thickness (for example, 2 μm or so).In the hydrophilic coating film 312 formed, remain and be added to
The isopropanol of basic envelope forming agent.Therefore, isopropanol can volatilize from the hydrophilic coating film 312 formed.
If completing the formation of hydrophilic coating film 312 by above-mentioned operation, by same process, also in matrix part
The face of 311 opposite side forms hydrophilic coating film 313 ((a)~(d) in reference picture 4).
(a)~(d) in Fig. 4 is the condensation inhibitory action for the hydrophilic coating film 312 for schematically showing lens cap 310
Figure.Here, hydrophilic coating film 312 is configured in the private side i.e. side of lens 10 of camera device 1.
If camera device 1 starts shooting action, the temperature inside device can due to circuit board unit 203 heating and
Rise.At this moment, can be as shown in (a) in Fig. 4, in lens cap 310 if the temperature of extraneous air is lower than inside device
Side produces water droplet 500 because of condensation.
On the other hand, in hydrophilic coating film 312, isopropanol is contained as described above, and such as dotted line arrow in (a) in Fig. 4
Shown in head, isopropanol volatilizees from the surface of hydrophilic coating film 312.Here, because the compatibility of isopropanol and water is high and with waving
Hair property, isopropanol can with because of condensation and caused by water droplet 500 mix in the state of volatilize, therefore, as shown in (b) in Fig. 4,
Water droplet 500 is segmented as tiny water droplet 501.
The tiny water droplet 501 being so so segmented can evaporate in the inside of camera device 1, but one part does not steam
Send out and residue in camera device 1, the medial surface of lens cap 310 is attached to as shown in (c) in Fig. 4.At this moment, the water of attachment
Drop 501 is quite tiny water droplet, therefore the hydrophilic coating film 312 with being formed at medial surface surface is affine, so as to such as Fig. 4 (d)
It is shown, obtained in the diffusion into the surface of hydrophilic coating film 312 relatively thin.Therefore, the fuzzy of the medial surface of lens cap 310 is suppressed, can be good
Ground ensures the visuality of photographed images.
＜ examines ＞
Present inventor has performed experiment to verify：Whether can be by the way that isopropanol be added into basic quilt as described above
In film forming agent, to suppress the medial surface of lens cap 310 situation fuzzy because of condensation.Specifically, in lens cap 310
Side and lateral surface form hydrophilic coating film 312,313 respectively, make what is used in the formation of these hydrophilic coating films 312,313
The changes of contents of volatile hydrophilic compounds (isopropanol) contained by hydrophilic coating film forming agent, so to lens cap
The 310 medial surface state fuzzy because of condensation is compared.Based on envelope forming agent, used by commercially available
The hydrophilic coating of hydrophilic material and base solvent composition (ethanol 31% (weight %, same as below), normal propyl alcohol 26%, the third two
Alcohol monomethyl ether 26%, methanol 5%, water 5%, amorphous silica 3%, silane compound 3%, other micro constitutents) institute's structure
Into hydrophilic coating film forming agent.The volatility of ethanol and methanol (saturated vapour pressure (20 DEG C)) is higher than isopropanol, and positive third
The volatility of alcohol and propylene glycol monomethyl ether (saturated vapour pressure (20 DEG C)) is lower than isopropanol.By with the isopropanol of purity 99%
(additive) dilutes solution coating that basic envelope forming agent forms in matrix part 311, so as to formed hydrophilic coating film 312,
313.The thickness of hydrophilic coating film 312,313 is about 2 μm.
In an experiment, camera device 1 (is actually subjected to the state of shooting action, light emitting diode in the state of action
Extinguish) placed 1 hour in the environment of -10 DEG C, afterwards, take out to normal temperature, observe the state of lens cap 310.
Observation is carried out after under just taking out camera device 1 to normal temperature environment, and from the time point by the time point of 5 minutes.For
Expression assay, at the two time points, shoots to the preceding surface of camera device 1, obtains photographed images.In addition,
It is real with camera device 1 after under just taking out camera device 1 to normal temperature environment for the ambiguity of testing lens cover 310
Border shoots landscape, obtains photographed images.
Further, since act camera device 1 during being placed 1 hour in the environment of -10 DEG C, therefore camera device
Temperature inside 1 can become higher than the temperature (- 10 DEG C) of outside.Therefore predict：In the process, can be in lens cap 310
Medial surface nearby produces condensation.In each experiment, the observation by above-mentioned two time point and the shooting to landscape, it is thus identified that
How caused fuzzy caused by the condensation is.
In addition, as comparative example 1, the camera device to being provided with the lens cap 310 for not forming hydrophilic coating film 312,313
1 has carried out same experiment.In addition, as comparative example 2, it is not added with additive (isopropanol) to being provided with and basic quilt is used only
The camera device 1 that film forming agent forms the lens cap 310 of hydrophilic coating film 312,313 has carried out same experiment.
In Fig. 5~Figure 13, (a)~(c) of each figure shows experimental result.In every figure including three width images,
Above and below image be respectively：In the case where just camera device 1 is taken out to normal temperature environment after and from the time light by
The time point of 5 minutes, the photographed images that the preceding surface of camera device 1 is shot and obtained；Middle image is：Just
After camera device 1 is taken out to normal temperature environment, with the actual photographed landscape of camera device 1 and the photographed images of acquirement.
(a)~(c) in Fig. 5 is the figure for the experimental result for representing comparative example 1.
As shown in (a) in Fig. 5, in comparative example 1, the rear lenses in the case where just taking out camera device 1 to normal temperature environment
Serious obscure is generated on cover 310.In addition, as shown in (c) in Fig. 5, in comparative example 1, camera device 1 is taken just
By time point of 5 minutes after going out to normal temperature environment, also generated on lens cap 310 serious fuzzy.Further, such as
It is rear actual with camera device 1 in the case where just taking out camera device 1 to normal temperature environment in comparative example 1 shown in (b) in Fig. 5
The photographed images for shooting landscape and obtaining are in and show that the fuzzy state of the degree of landscape can not be seen clearly.
(a)~(c) in Fig. 6 is the figure for the experimental result for representing comparative example 2.
As shown in (a) in Fig. 6, in comparative example 2, saturating after under just camera device 1 is taken out to normal temperature environment
Fuzzy but fuzzy degree is generated in lens cover 310 compared to comparative example 1 to diminish.In addition, as shown in (c) in Fig. 6,
In comparative example 2, by time point of 5 minutes after under just taking out camera device 1 to normal temperature environment, on lens cap 310 also
Fuzzy but fuzzy degree is remained compared to comparative example 1 to diminish.Therefore, according to these assays, it is thus identified that by
Hydrophilic coating film 312,313 is formed on lens cap 310, caused obscure that condense can be suppressed.
However, as shown in (b) in Fig. 6, in comparative example 2, after under just camera device 1 is taken out to normal temperature environment
The photographed images obtained with the actual photographed landscape of camera device 1, are improved, but also show difficulty compared to comparative example 1
To see the fuzzy of the degree of landscape clearly well, photographed images are also quite unintelligible.It is thus identified that used by camera device 1
In the case of purpose is monitored, if basic envelope forming agent is used only as comparative example 2 forms hydrophilic coating film 312,313,
It is then unintelligible due to image, can there is a situation where can not suitably carry out accident etc. inspection.
(a)~(c) in Fig. 7 is the figure for the experimental result for representing embodiment 1.
In embodiment 1, so that basic envelope forming agent (in figure, is designated as base solvent.It is same as below)：Additive is (different
Propyl alcohol)=2：1 mode, the basic envelope forming agent of hydrophilic material is contained additive (isopropanol), and be used as hydrophily
Envelope forming agent.Therefore, additive (isopropanol) is 33.3% relative to the containing ratio of hydrophilic coating film forming agent.
As shown in (a) in Fig. 7, in embodiment 1, the rear lenses in the case where just taking out camera device 1 to normal temperature environment
It is almost fuzzy without producing on cover 310.In addition, as shown in (c) in Fig. 7, in embodiment 1, camera device 1 is taken just
It is also almost fuzzy without producing on lens cap 310 by time point of 5 minutes after going out to normal temperature environment.Therefore, according to these
Assay, it is thus identified that by using the hydrophilic coating film forming agent of additive (isopropanol) is with the addition of with above-mentioned ratio and saturating
Hydrophilic coating film 312,313 is formed in lens cover 310, can significantly suppress caused obscure that condense.
In addition, as shown in (b) in Fig. 7, in embodiment 1, after under just camera device 1 is taken out to normal temperature environment
The photographed images obtained with the actual photographed landscape of camera device 1 almost do not show to obscure, in almost whole region all
It is clearly image.It is thus identified that by camera device 1 for monitoring purposes in the case of, can also pass through such as embodiment 1
The hydrophilic coating film forming agent that forms of additive (isopropanol) that makes basic envelope forming agent contain above-mentioned ratio like that and
Hydrophilic coating film 312,313 is formed, so that photographed images will not be suffered damage due to condensation, photographed images can be used appropriate
The inspection of ground carry out accident etc..
(a)~(c) in Fig. 8 is the figure for the experimental result for representing embodiment 2.
In example 2, so that basic envelope forming agent：Additive (isopropanol)=1：1 mode, makes hydrophilic material
Basic envelope forming agent contain additive (isopropanol), and be used as hydrophilic coating film forming agent.Therefore, additive (isopropanol)
Containing ratio relative to hydrophilic coating film forming agent is 50.0%.
As shown in (a) in Fig. 8, in example 2, the rear lenses in the case where just taking out camera device 1 to normal temperature environment
Generated on cover 310 it is a little fuzzy, it is fuzzy to be inhibited but compared to comparative example 2.In addition, as shown in (c) in Fig. 8,
In embodiment 2, by time point of 5 minutes after under just taking out camera device 1 to normal temperature environment, produced on lens cap 310
Given birth to it is a little fuzzy, it is fuzzy to be inhibited but compared to comparative example 2.Therefore, according to these assays, it is thus identified that pass through
Use so that above-mentioned ratio with the addition of the hydrophilic coating film forming agent of additive (isopropanol) and form hydrophily on lens cap 310
Envelope 312,313, caused obscure that condense can be suppressed compared to comparative example 2.
In addition, as shown in (b) in Fig. 8, in example 2, after under just camera device 1 is taken out to normal temperature environment
The photographed images obtained with the actual photographed landscape of camera device 1 shown in a part of region it is fuzzy, but in other regions
Obtain clearly image.It is thus identified that by as in Example 2, containing above-mentioned ratio using basic envelope forming agent is made
Hydrophilic coating film forming agent that the additive (isopropanol) of rate forms and form hydrophilic coating film 312,313, compared to comparative example
2, the situation that the clarity of photographed images is suffered damage due to condensation can be suppressed, preferably carry out accident using photographed images
Deng inspection.
(a)~(c) in Fig. 9 is the figure for the experimental result for representing embodiment 3.
In embodiment 3, so that basic envelope forming agent：Additive (isopropanol)=1：2 mode, makes hydrophilic material
Basic envelope forming agent contain additive (isopropanol), and be used as hydrophilic coating film forming agent.Therefore, additive (isopropanol)
Containing ratio relative to hydrophilic coating film forming agent is 66.6%.
As shown in (a) in Fig. 9, in embodiment 3, the rear lenses in the case where just taking out camera device 1 to normal temperature environment
Generated on cover 310 it is fuzzy, it is fuzzy to be inhibited but compared to comparative example 2.In addition, as shown in (c) in Fig. 9, implementing
In example 3, by time point of 5 minutes after under just taking out camera device 1 to normal temperature environment, generated on lens cap 310
It is fuzzy, but compared to comparative example 2, it is fuzzy to be inhibited.Therefore, according to these assays, it is thus identified that by using the above
State ratio with the addition of the hydrophilic coating film forming agent of additive (isopropanol) and formed on lens cap 310 hydrophilic coating film 312,
313, it can suppress caused obscure that condense compared to comparative example 2.
In addition, as shown in (b) in Fig. 9, in embodiment 3, after under just camera device 1 is taken out to normal temperature environment
The photographed images obtained with the actual photographed landscape of camera device 1 shown in a part of region it is fuzzy, but in other regions
Obtain and compare clearly image.It is thus identified that by as in Example 3, being contained using basic envelope forming agent is made
State the hydrophilic coating film forming agent that the additive (isopropanol) of ratio forms and form hydrophilic coating film 312,313, compared to than
Compared with example 2, the situation that the clarity of photographed images is suffered damage due to condensation can be suppressed, preferably carried out using photographed images
The inspection of accident etc..
(a)~(c) in Figure 10 is the figure for the experimental result for representing embodiment 4.
In example 4, so that basic envelope forming agent：Additive (isopropanol)=1：3 mode, makes hydrophilic material
Basic envelope forming agent contain additive (isopropanol), and be used as hydrophilic coating film forming agent.Therefore, additive (isopropanol)
Containing ratio relative to hydrophilic coating film forming agent is 75.0%.
As shown in (a) in Figure 10, in example 4, the rear lenses in the case where just taking out camera device 1 to normal temperature environment
Generate fuzzy on cover 310, but die down and be inhibited compared to comparative example 2 is fuzzy.In addition, as shown in (c) in Figure 10,
In example 4, after under just taking out camera device 1 to normal temperature environment by time point of 5 minutes, on lens cap 310
Generate fuzzy, but die down and be inhibited compared to comparative example 2 is fuzzy.Therefore, according to these assays, it is thus identified that logical
Use is crossed so that above-mentioned ratio with the addition of the hydrophilic coating film forming agent of additive (isopropanol) and be formed on lens cap 310 hydrophilic
Property envelope 312,313, can suppress to condense compared to comparative example 2 caused fuzzy.
In addition, as shown in (b) in Figure 10, in example 4, in the case where just camera device 1 is taken out to normal temperature environment
The photographed images obtained afterwards with the actual photographed landscape of camera device 1 show fuzzy on the whole, but show fuzzy
It is weaker, obtain compare clearly image on the whole.It is thus identified that by as in Example 4, using making basic envelope
Hydrophilic coating film forming agent that the additive (isopropanol) that forming agent contains above-mentioned ratio forms and formed hydrophilic coating film 312,
313, compared to comparative example 2, the situation that the clarity of photographed images is suffered damage due to condensation can be suppressed, preferably used
The inspection of photographed images carry out accident etc..
(a)~(c) in Figure 11 is the figure for the experimental result for representing embodiment 5.
In embodiment 5, so that basic envelope forming agent：Additive (isopropanol)=4：1 mode, makes hydrophilic material
Basic envelope forming agent contain additive (isopropanol), and be used as hydrophilic coating film forming agent.Therefore, additive (isopropanol)
Containing ratio relative to hydrophilic coating film forming agent is 20.0%.
As shown in (a) in Figure 11, in embodiment 5, the rear lenses in the case where just taking out camera device 1 to normal temperature environment
It is almost fuzzy without producing on cover 310.In addition, as shown in (c) in Figure 11, in embodiment 5, just by camera device 1
Take out to after under normal temperature environment the time point by 5 minutes, it is also almost fuzzy without producing on lens cap 310.Therefore, according to this
A little assays, it is thus identified that by using the hydrophilic coating film forming agent that additive (isopropanol) is with the addition of with above-mentioned ratio
Hydrophilic coating film 312,313 is formed on lens cap 310, can significantly suppress caused obscure that condense.
In addition, as shown in (b) in Figure 11, in embodiment 5, in the case where just camera device 1 is taken out to normal temperature environment
Its clarity is slightly worse compared to embodiment 1 for the photographed images obtained afterwards with the actual photographed landscape of camera device 1, but does not almost have
Show to obscure, be all substantially clearly image in almost whole region.It is thus identified that camera device 1 is being used to monitor
, also can be by as in Example 1 using the additive for making basic envelope forming agent contain above-mentioned ratio in the case of purpose
Hydrophilic coating film forming agent that (isopropanol) forms and form hydrophilic coating film 312,313 so that photographed images will not be due to knot
Reveal and suffer damage, the inspection of photographed images suitably carry out accident etc. can be used.
(a)~(c) in Figure 12 is the figure for the experimental result for representing embodiment 6.
In embodiment 6, so that basic envelope forming agent：Additive (isopropanol)=7：1 mode, makes hydrophilic material
Basic envelope forming agent contain additive (isopropanol), and be used as hydrophilic coating film forming agent.Therefore, additive (isopropanol)
Containing ratio relative to hydrophilic coating film forming agent is 12.5%.
As shown in (a) in Figure 12, in embodiment 6, the rear lenses in the case where just taking out camera device 1 to normal temperature environment
Generated on cover 310 it is a little fuzzy, it is fuzzy to be inhibited but compared to comparative example 2.In addition, as shown in (c) in Figure 12,
In example 2, after under just taking out camera device 1 to normal temperature environment by time point of 5 minutes, on lens cap 310
Generate it is a little fuzzy, it is fuzzy to be inhibited but compared to comparative example 2.Therefore, according to these assays, it is thus identified that logical
Use is crossed so that above-mentioned ratio with the addition of the hydrophilic coating film forming agent of additive (isopropanol) and be formed on lens cap 310 hydrophilic
Property envelope 312,313, can suppress to condense compared to comparative example 2 caused fuzzy.
In addition, as shown in (b) in Figure 12, in embodiment 6, in the case where just camera device 1 is taken out to normal temperature environment
Its clarity is slightly worse compared to embodiment 1 for the photographed images obtained afterwards with the actual photographed landscape of camera device 1, but its clarity
The degree of whole region can be seen clearly by ensuring.It is thus identified that by as in Example 6, being formed using basic envelope is made
Hydrophilic coating film forming agent that the additive (isopropanol) that agent contains above-mentioned ratio forms and form hydrophilic coating film 312,313,
Compared to comparative example 2, it can be ensured that the clarity of photographed images, preferably using the inspection of photographed images carry out accident etc..
(a)~(c) in Figure 13 is the figure for the experimental result for representing embodiment 7.
In embodiment 7, so that basic envelope forming agent：Additive (isopropanol)=9：1 mode, makes hydrophilic material
Basic envelope forming agent contain additive (isopropanol), and be used as hydrophilic coating film forming agent.Therefore, additive (isopropanol)
Containing ratio relative to hydrophilic coating film forming agent is 10.0%.
As shown in (a) in Figure 13, in embodiment 7, the rear lenses in the case where just taking out camera device 1 to normal temperature environment
Generated on cover 310 it is fuzzy, it is fuzzy to be inhibited but compared to comparative example 2.In addition, as shown in (c) in Figure 13, in reality
Apply in example 7, by time point of 5 minutes after under just taking out camera device 1 to normal temperature environment, produced on lens cap 310
It is fuzzy, but compared to comparative example 2, it is fuzzy to be inhibited.Therefore, according to these assays, it is thus identified that by using with
Above-mentioned ratio with the addition of the hydrophilic coating film forming agent of additive (isopropanol) and form hydrophilic coating film on lens cap 310
312nd, 313, it can suppress caused obscure that condense compared to comparative example 2.
In addition, as shown in (b) in Figure 13, in embodiment 7, in the case where just camera device 1 is taken out to normal temperature environment
The photographed images obtained afterwards with the actual photographed landscape of camera device 1 show to obscure slightly, but obtain can see clearly it is whole
The image in region.It is thus identified that by as in Example 7, being added using making basic envelope forming agent contain with above-mentioned ratio
Add the envelope forming agent that agent (isopropanol) forms and form hydrophilic coating film 312,313, compared to comparative example 2, can suppress to take the photograph
As the situation that the clarity of image is suffered damage due to condensation, preferably using the inspection of photographed images carry out accident etc..
Experimental result more than, it is thus identified that by adding additive (isopropanol), energy into basic envelope forming agent
Enough suppress the caused condensation on lens cap 310, and the clarity of photographed images can be improved.
Particularly, it is thus identified that by with the scope of the containing ratio shown in above-described embodiment 1~7, i.e. more than 10.0%
The scope of less than 75.0% containing ratio makes envelope forming agent contain additive (isopropanol), can suppress on lens cap 310
Caused condensation, and the clarity of photographed images can be improved.Thus, it could be seen that by making additive (isopropanol) relative to envelope
The containing ratio of forming agent is at least less than more than 10.0% 80.0% degree, compared to comparative example 2, can be suppressed in lens cap
Caused condensation on 310, and the clarity of photographed images can be improved.
In addition, for the experimental result of embodiment 1,2,5, compared to the experimental result of other embodiments, obtain more
Clearly photographed images.Thus, it could be seen that additive (isopropanol) is preferably to wrap relative to the containing ratio of hydrophilic coating film forming agent
Scope, i.e. more than 15% 60% containing the containing ratio (33.3%, 50.0%, 20.0%) used in these embodiments 1,2,5
Following degree.
In addition, for the experimental result of embodiment 1,5, significantly more clarity is obtained, and almost do not had
There are fuzzy clearly photographed images.Thus, it could be seen that containing ratio of the additive (isopropanol) relative to hydrophilic coating film forming agent
More preferably include scope, i.e. less than more than 20% 40% of the containing ratio (33.3%, 20.0%) used in embodiment 1,5
The scope of degree.
It is furthermore conceivable that：Although used in above-mentioned experiment as added to the additive in basic envelope forming agent
Isopropanol, but as long as be can give play to the effect that (a)~(d) in reference picture 4 is illustrated compound, i.e. with water
Compatibility is high and has volatile compound, then can also realize same effect when adding other compounds as additive
Fruit, that is, suppress the caused condensation on lens cap 310 and improve effect as the clarity of photographed images.
The effect ＞ of ＜ embodiments
According to present embodiment, following effect can be achieved.
Because the hydrophilic coating film 312 of the medial surface formation in lens cap 310 is (different containing volatile hydrophilic compounds
Propyl alcohol), therefore the medial surface of lens cap 310 feelings fuzzy because of condensation can be suppressed by the effect of the compound (isopropanol)
Condition.That is, the compatibility of volatile hydrophilic compounds (isopropanol) contained by hydrophilic coating film 312 and water is high and with waving
Hair property, therefore the compound (isopropanol) can with because of condensation and caused by water droplet 500 mix in the state of volatilize so that water
Drip 500 sectionalizations.The tiny water droplet 501 being so segmented evaporates in the inside of camera device 1, in addition, one part is not
Evaporate and residue in camera device 1, and be attached to the medial surface of lens cap 310.But the water droplet 501 of attachment is quite tiny
Water droplet, therefore can spread thinner in the hydrophilic coating film 312 for being formed at the medial surface of lens cap 310.Therefore, lens can be suppressed
Cover the fuzzy of 310 medial surfaces and ensure the visuality of photographed images well.
Here, in the case where using isopropanol as volatile hydrophilic compounds, such as above-mentioned experimental result (is implemented
Example 1~7) shown in like that, isopropanol is set as less than more than 10% 80% relative to the containing ratio of hydrophilic coating film forming agent,
So as to suppress the condensation on the medial surface of lens cap 310, and effectively improve the image quality of photographed images.
In this case, according to the experimental result of above-described embodiment 1,2,5, by make hydrophilic coating film forming agent with
The scope of less than more than 15.0% 60.0% containing ratio contains isopropanol, can obtain clearly photographed images.
Further, according to the experimental result of above-described embodiment 1,5, by making hydrophilic coating film forming agent with more than 20%
The scope of less than 40% containing ratio contains isopropanol, can obtain the photographed images become apparent from, and can almost not had
There are fuzzy clearly photographed images.
In addition, in the present embodiment, due on the lateral surface of the lens cap 310 of 10 opposite side of lens, also using containing
There is the hydrophilic coating film forming agent of volatile hydrophilic compounds (isopropanol) formed with hydrophilic coating film 313, therefore also can
Enough suppress the condensation on the lateral surface of lens cap 310, and can further improve the image quality of photographed images.
Further, in the present embodiment, due to being configured with the heating of the temperature for improving the medial surface of lens cap 310
Device, therefore the water droplet 501 being segmented near the medial surface of lens cap 310 by the effect of compound (isopropanol) is easier
Evaporation, can suppress attachment of the water droplet 501 in the medial surface of lens cap 310.Therefore, it is possible to more effectively suppress lens cap 310
The medial surface situation fuzzy because of condensation.
＜ modifications ＞
In the above-described embodiment, not only also use to basic envelope and formed in lateral surface in the medial surface of lens cap 310
The solvent that volatile hydrophilic compounds (isopropanol) form is added in agent and forms hydrophilic coating film 313, but in lens
The lateral surface of cover 310 can also form hydrophilic coating film 313 using the basic envelope forming agent for being not added with the additive.
In addition, in the above-described embodiment, hydrophilic coating film is not formed in LED hood 320, but in the inner side of LED hood 320
Face can also be identically formed hydrophilic coating film with lens cap 310, further, LED hood 320 lateral surface can also with it is saturating
Lens cover 310 is identically formed hydrophilic coating film.
In addition, in fig. 2, as the structure for the optical system for obtaining the light from target area, only diagram has lens 10,
But in the front side of imaging sensor 20, can also be further containing the other structures beyond lens 10.For example, it is also possible to enter one
Step contains：For limiting the light from outside so as to be incident to the strong and weak corresponding suitable light quantity of the light from target area
The aperture positioning mechanism of imaging sensor 20, the optical filtering for removing infrared ray is used in day and night relative to optical system
The optical filtering mechanism loaded and unloaded of light path etc..
In addition, the quantity of light emitting diode 101 and configuration are not necessarily limited to as shown in (c) in Fig. 1,
Light emitting diode 101 can be configured on camera device 1 according to other quantity and configuration.
In addition, in the above-described embodiment, camera device 1 is transmitted by radio communication to external device (ED) 2, but image
Device 1 can also be transmitted by wire communication to external device (ED) 2.Or can also be by the way that photographed images be recorded in into peace
In storage card loaded on camera device 1, and the storage card is taken out from camera device 1, is then mounted in external device (ED) 2,
So as to which photographed images are inputted into external device (ED) 2.
In addition, in the above-described embodiment, camera device 1 is arranged at the outer wall of building etc., the structure on roof, electric wire
Bar etc., but the setting place not limited to this of camera device 1.For example, it is also possible to camera device 1 is set on traffic mark, or,
Camera device 1 can also be integratedly included on street lamp etc..Camera device 1 is not necessarily camera device for monitoring purposes,
It can also be the portable camera device for being used to shoot landscape.
In addition, embodiments of the present invention can be suitably in the range of the technological thought shown in claims
Carry out various changes.
Description of reference numerals
1- camera devices；10- lens；20- imaging sensors；310- lens caps；311- matrix parts；312nd, 313- is hydrophilic
Property envelope.
Claims (11)
1. a kind of camera device, it is characterised in that it possesses：
Imaging sensor；
The lens for making the light from target area be imaged in described image sensor；And
From the lens cap of lens described in outer side covers,
Medial surface in the lens side of the lens cap, uses the hydrophilic coating film containing volatile hydrophilic compounds
Forming agent turns into volatile hydrophilic compounds and volatilized from the surface of the hydrophilic coating film formed with hydrophilic coating film
State, wherein, 20 DEG C of saturated vapour pressure of volatile hydrophilic compounds is more than 15mmHg below 40mmHg.
2. camera device according to claim 1, it is characterised in that volatile hydrophilic compounds are isopropyl
Alcohol, the containing ratio of the isopropanol in the hydrophilic coating film forming agent is less than more than 10% 80%.
3. camera device according to claim 2, it is characterised in that isopropanol in the hydrophilic coating film forming agent
Containing ratio is less than more than 15% 60%.
4. camera device according to claim 2, it is characterised in that isopropanol in the hydrophilic coating film forming agent
Containing ratio is less than more than 20% 40%.
5. camera device according to any one of claim 1 to 4, it is characterised in that in the described of the lens cap
The lateral surface of the opposite side of mirror, also using the hydrophilic coating film forming agent containing volatile hydrophilic compounds formed with hydrophily
Envelope.
6. camera device according to any one of claim 1 to 4, it is characterised in that it is also equipped with described for improving
The heater of the temperature of the medial surface of lens cap.
7. camera device according to claim 5, it is characterised in that it is also equipped with the inner side for improving the lens cap
The heater of the temperature in face.
8. a kind of lens cap, the lens cap is used to cover and protect lens, and the lens cap is characterised by,
Medial surface in the lens side, using the hydrophilic coating film forming agent containing volatile hydrophilic compounds formed with
Hydrophilic coating film, turn into the state that volatile hydrophilic compounds volatilize from the surface of the hydrophilic coating film,
Wherein, 20 DEG C of saturated vapour pressure of volatile hydrophilic compounds is more than 15mmHg below 40mmHg.
9. lens cap according to claim 8, it is characterised in that volatile hydrophilic compounds are isopropanol,
The containing ratio of isopropanol in the hydrophilic coating film forming agent is less than more than 10% 80%.
10. a kind of manufacture method of lens cap, the lens cap is used to cover and protect lens, and the manufacture method of the lens cap contains
Have：
Hydrophilic coating film forming agent containing volatile hydrophilic compounds is coated on transparent and plate-like matrix part
Side at least relative with the lens on process；And
The process for drying the hydrophilic coating film forming agent of coating,
Wherein, 20 DEG C of saturated vapour pressure of volatile hydrophilic compounds is more than 15mmHg below 40mmHg.
11. the manufacture method of lens cap according to claim 10, it is characterised in that in the hydrophilic coating film forming agent
Isopropanol containing ratio be less than more than 10% 80%.
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| JP2016152361A JP2018022007A (en) | 2016-08-02 | 2016-08-02 | Imaging device, lens cover, and method of manufacturing lens cover |
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| CN112925151B (en) * | 2021-01-26 | 2022-02-11 | 山东优越智能装备科技有限公司 | Conveying device for cooked food processing and using method thereof |
-
2016
- 2016-08-02 JP JP2016152361A patent/JP2018022007A/en active Pending
-
2017
- 2017-07-13 TW TW106123482A patent/TW201816499A/en unknown
- 2017-07-20 KR KR1020170091791A patent/KR20180015078A/en unknown
- 2017-08-01 CN CN201710646140.XA patent/CN107678078A/en active Pending
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110278351A (en) * | 2018-03-15 | 2019-09-24 | 欧姆龙株式会社 | Imaging sensor |
Also Published As
| Publication number | Publication date |
|---|---|
| TW201816499A (en) | 2018-05-01 |
| KR20180015078A (en) | 2018-02-12 |
| JP2018022007A (en) | 2018-02-08 |
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Application publication date: 20180209 |