CN104678682A - Lens assembly, light supplementing assembly and a camera with light supplementing assembly - Google Patents
Lens assembly, light supplementing assembly and a camera with light supplementing assembly Download PDFInfo
- Publication number
- CN104678682A CN104678682A CN201310629342.5A CN201310629342A CN104678682A CN 104678682 A CN104678682 A CN 104678682A CN 201310629342 A CN201310629342 A CN 201310629342A CN 104678682 A CN104678682 A CN 104678682A
- Authority
- CN
- China
- Prior art keywords
- light
- intensity distribution
- luminous intensity
- distribution module
- camera
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Pending
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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
- G03B15/00—Special procedures for taking photographs; Apparatus therefor
- G03B15/02—Illuminating scene
- G03B15/03—Combinations of cameras with lighting apparatus; Flash units
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F21—LIGHTING
- F21V—FUNCTIONAL FEATURES OR DETAILS OF LIGHTING DEVICES OR SYSTEMS THEREOF; STRUCTURAL COMBINATIONS OF LIGHTING DEVICES WITH OTHER ARTICLES, NOT OTHERWISE PROVIDED FOR
- F21V5/00—Refractors for light sources
- F21V5/04—Refractors for light sources of lens shape
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- 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
- H04N23/55—Optical parts specially adapted for electronic image sensors; Mounting thereof
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F21—LIGHTING
- F21Y—INDEXING SCHEME ASSOCIATED WITH SUBCLASSES F21K, F21L, F21S and F21V, RELATING TO THE FORM OR THE KIND OF THE LIGHT SOURCES OR OF THE COLOUR OF THE LIGHT EMITTED
- F21Y2101/00—Point-like light sources
Abstract
The invention relates to a lens assembly. The lens assembly comprises at least three light distribution modules and one transparent panel; the transparent panel comprises two opposite panel surfaces and is provided with one light transmitting hole penetrating the two panel surfaces; the light transmitting holes are used for aligning to a lens of the camera; the at least three light distribution modules are arranged around the light transmitting hole; each light distribution module is a convex lens; each light distribution module comprises an inward concave curved surface and an outward convex curved surface which are oppositely arranged, wherein each inward concave curved surface is an incident surface; each inward concave curved surface is a hemispherical surface of which the circle center is located on the optical axis of each light distribution module; each inward concave curved surface is fixed on one panel surface; the outward convex curved surface takes the optical axis of each light distribution module as a central shaft; each outer convex curved surface is used for refracting light emitted by each inward concave surface in a mode of multiple equal-width circular ring ranges, and the circular ring ranges are the same in illuminance. By the adoption of the lens assembly, the light source uniformity is better, and the light flux utilization rate is higher. In addition, the invention also provides a light supplementing assembly with the lens assembly, and the camera.
Description
Technical field
The present invention relates to field of photography, particularly relate to a kind of lens subassembly, light filling assembly and there is the camera of this light filling assembly.
Background technology
Current employing shot record information is in people's daily life widespread use, and along with supervisory system is in civilian day by day the popularizing of commercialization, CCTV camera (monitoring camera) is widely used in every field, for social security escorts.
CCTV camera is widely used in the occasions such as residential building, road, arcade shop premises and accounting office.Each different application, needs dissimilar CCTV camera.For meeting the demand of the monitoring of night monitoring and some Code in Hazardous Special Locations, day and night type CCTV camera arises at the historic moment, and presents fast development.
Day and night the camera lens side of type camera monitor is all equipped with LED and is carried out light filling, but these light filling modes mainly contain two kinds at present on the market: 1. the LED that aside directly arranges carries out light filling, 2. add reflector with LED and carry out light filling, however above two kinds of its illuminance of mode and uniformity coefficient generally not ideal.
Summary of the invention
The object of the present invention is to provide a kind of illuminance uniformity better, the lens subassembly that utilance is higher, light filling assembly and have the camera of this light filling assembly.
In order to solve the problems of the technologies described above, the invention provides a kind of lens subassembly, it comprises at least 3 luminous intensity distribution modules and a transparent panel, described transparent panel comprises two cards be oppositely arranged, described transparent panel offers the light hole that runs through described two cards, described light hole is for aiming at the camera lens of camera, described at least 3 luminous intensity distribution modules are arranged around described light hole, each described luminous intensity distribution module is all convex lens, described luminous intensity distribution module comprises the inner sunken face and convex outward that are oppositely arranged, described inner sunken face is the plane of incidence, described inner sunken face is the hemisphere face that the center of circle is positioned on described luminous intensity distribution module optical axis, described inner sunken face is fixed on a described card, described convex outward is axle centered by described luminous intensity distribution module optical axis, the light that described convex outward is used for described inner concave to transmit reflects with the angular range of multiple equal portions, and the luminous energy of each part angular range is equal.
Wherein, described transparent panel is disc-shaped structure.
Wherein, described luminous intensity distribution module adopts optical-grade transparent plastic material to make.
The present invention also provides a kind of light filling assembly, it comprises at least 3 light sources and a lens subassembly, described lens subassembly comprises at least 3 luminous intensity distribution modules and a transparent panel, described transparent panel comprises two cards be oppositely arranged, described transparent panel offers the light hole that runs through described two cards, described light hole is for aiming at the camera lens of camera, described each luminous intensity distribution module respectively with each described light source one_to_one corresponding, described at least 3 luminous intensity distribution modules are arranged around described light hole, each described luminous intensity distribution module is all convex lens, described luminous intensity distribution module comprises the inner sunken face and convex outward that are oppositely arranged, described inner sunken face is the plane of incidence, described inner sunken face is the hemisphere face that the center of circle is positioned on described luminous intensity distribution module optical axis, described inner sunken face is fixed on a described card, described convex outward is axle centered by described luminous intensity distribution module optical axis, each described light source is contained in each described inner sunken face respectively, be positioned at the circle centre position of described inner sunken face, the light that described light source sends keeps light type to be transmitted through described convex outward through described inner sunken face, reflect with the angular range of multiple equal portions at described convex outward, and the luminous energy of each part angular range is equal.
Wherein, described transparent panel is disc-shaped structure.
Wherein, described light source is Lambertian source.
Wherein, described luminous intensity distribution module adopts optical-grade transparent plastic material to make.
The present invention also provides a kind of camera, and it comprises camera lens and above-mentioned light filling assembly, light hole described in described alignment lens.
Wherein, described transparent panel is disc-shaped structure.
Wherein, described light source is Lambertian source.
Light filling assembly provided by the present invention adopts light source to add lens and does light filling, and light filling illuminance uniformity is better, and utilance is higher.
Accompanying drawing explanation
In order to be illustrated more clearly in technical scheme of the present invention, be briefly described to the accompanying drawing used required in embodiment below, apparently, accompanying drawing in the following describes is only some embodiments of the present invention, for those of ordinary skill in the art, under the prerequisite not paying creative work, other accompanying drawing can also be obtained according to these accompanying drawings.
Fig. 1 is the schematic diagram of the camera that embodiment of the present invention provides;
Fig. 2 is the schematic diagram of the subelement of the light filling assembly of the camera of Fig. 1;
Fig. 3 is the cut-open view along III-III direction of the light filling assembly of Fig. 2;
Fig. 4 is the design concept figure of the convex outward of the camera of Fig. 1;
Fig. 5 is the Illumination Distribution figure of the light filling assembly of the camera of Fig. 1.
Embodiment
Below in conjunction with the accompanying drawing in embodiment of the present invention, the technical scheme in embodiment of the present invention is clearly and completely described.
Refer to Fig. 1, a kind of camera 100 that embodiment of the present invention provides, described camera 100 comprises light filling assembly 10 and camera lens 20.Described light filling assembly 10 is described camera lens 20 light filling.
Described light filling assembly 10 comprises 4 light sources 11 and a lens subassembly 12.Certainly, in other embodiments, described light filling assembly 10 can also comprise 2,4 or more described light sources 11.Described lens subassembly 12 comprises 3 luminous intensity distribution modules 120 and a transparent panel 121.
Described transparent panel 121 comprises two the card 121a be oppositely arranged, and described transparent panel 121 offers light hole 121b and 3 the through hole 121c that runs through described two card 121a, and described light hole 121b is for aiming at the camera lens 20 of described camera 100.Described 3 through hole 121c are arranged around light hole 121b, for arranging described luminous intensity distribution module 120.In present embodiment, described transparent panel 121 is disc structure.Certainly, in other embodiments, described transparent panel 121 also can be the disk-like structure of other shapes such as ellipse, polygon.3 described luminous intensity distribution modules 120 are one-body molded by described transparent panel 121, form a lens subassembly 12, are convenient to install location.
Described each luminous intensity distribution module 120 respectively with each described light source 11 one_to_one corresponding, described 3 luminous intensity distribution modules 120 are arranged around described light hole 121b.In present embodiment, described 3 luminous intensity distribution modules 120 are evenly arranged in annulus.Certainly, in other embodiments, described luminous intensity distribution module 120 can also adopt 2,4 or more according to the number of described light source 11.
See also Fig. 2 and Fig. 3, described luminous intensity distribution module 120 is convex lens, described luminous intensity distribution module 120 comprises the inner sunken face 120a and convex outward 120b that are oppositely arranged, described inner sunken face 120a is the plane of incidence, described inner sunken face 120a is the hemisphere face that the center of circle is positioned on described luminous intensity distribution module 120 optical axis, and the radius of described inner sunken face 120a is 2.5mm.Described inner sunken face 120a is fixed on a described card 121a (consulting Fig. 1), described convex outward 120b is axle centered by described luminous intensity distribution module 120 optical axis 00 ', the light that described convex outward 120b is used for described inner sunken face 120a to transmit is with multiple wide annulus range mode refraction, and the illumination of each described annulus scope is equal.In present embodiment, described inner sunken face 120a is just arranged described through hole 121c.
Described convex outward 120b, according to following method design, presets multiple described annulus scope, by equal for the illuminance setting of each described annulus scope.Due to illumination=light intensity/square distance, the distribution of light of each annulus scope can be calculated, then according to the Illumination Distribution of law of conservation of energy and described light source 11, utilize refraction law can calculate the curve of described convex outward 120b.Particularly, refer to Fig. 4, such as described luminous point is positioned at O point, i.e. true origin; AB line is parallel with X-axis, and OC is Z axis, presets described annulus scope, i.e. the coordinate of terminal R.According to refraction law: nsin (θ '+β)=sin (alpha+beta), derives
the curve can obtaining described convex outward 120b is put horizontal ordinate and the ordinate of Q.Initial coordinate point C is set for (0.00,5.00), then obtains free curve coordinate points by interative computation, finally import 3D mapping software and draw out lens.
In present embodiment, described luminous intensity distribution module 120 adopts optical-grade transparent plastic material to make.Particularly, described luminous intensity distribution module 120 adopts polymethylmethacrylate to make.Described luminous intensity distribution module 120 also can adopt glass to make.
See also Fig. 3, described light source 11 is contained in described inner sunken face 120a, the optical axis NN ' of described light source 11 coincides with the optical axis OO ' of described luminous intensity distribution module 120, the light L1 that described light source 11 sends is transmitted through described luminous intensity distribution module 120 convex outward 120b through described inner sunken face 120a, bright dipping is reflected with multiple wide annulus range mode refraction through described convex outward 120b, and the illumination of each described annulus scope is equal, final formed a uniform-illumination, half light intensity angle is the light distribution effect of 90 degree.Particularly, described light source 11 is Lambertian source.Described light source 11 adopts light to lead to 1001m High Power LED chip.Certainly, in other embodiments, as long as described light source 11 light-configuration mode meets can adopting of lambert's type.
Refer to Fig. 5, its largest light intensity value of light filling assembly 10 provided by the present invention reaches 150cd, and half light intensity angle is 90 °.2 meter Yuan center illumination are 231x, can cover the camera watch region that field angle is 90 °.
Light filling assembly provided by the present invention adopts light source to add lens and does light filling, and light filling illuminance uniformity is better, and utilance is higher.
In addition, light filling modular construction provided by the present invention is fairly simple, die sinking is easily shaping.
The above is the preferred embodiment of the present invention; it should be pointed out that for those skilled in the art, under the premise without departing from the principles of the invention; can also make some improvements and modifications, these improvements and modifications are also considered as protection scope of the present invention.
Claims (10)
1. a lens subassembly, it comprises at least 3 luminous intensity distribution modules and a transparent panel, described transparent panel comprises two cards be oppositely arranged, described transparent panel offers the light hole that runs through described two cards, described light hole is for aiming at the camera lens of camera, described at least 3 luminous intensity distribution modules are arranged around described light hole, each described luminous intensity distribution module is all convex lens, described luminous intensity distribution module comprises the inner sunken face and convex outward that are oppositely arranged, described inner sunken face is the plane of incidence, described inner sunken face is the hemisphere face that the center of circle is positioned on described luminous intensity distribution module optical axis, described inner sunken face is fixed on a described card, described convex outward is axle centered by described luminous intensity distribution module optical axis, the light that described convex outward is used for described inner concave to transmit is with multiple wide annulus range mode refraction, and the illumination of each described annulus scope is equal.
2. lens subassembly according to claim 1, is characterized in that, described transparent panel is disc-shaped structure.
3. lens subassembly according to claim 1, is characterized in that, described luminous intensity distribution module adopts optical-grade transparent plastic material to make.
4. a light filling assembly, it comprises at least 3 light sources and a lens subassembly, described lens subassembly comprises at least 3 luminous intensity distribution modules and a transparent panel, described transparent panel comprises two cards be oppositely arranged, described transparent panel offers the light hole that runs through described two cards, described light hole is for aiming at the camera lens of camera, described each luminous intensity distribution module respectively with each described light source one_to_one corresponding, described at least 3 luminous intensity distribution modules are arranged around described light hole, each described luminous intensity distribution module is all convex lens, described luminous intensity distribution module comprises the inner sunken face and convex outward that are oppositely arranged, described inner sunken face is the plane of incidence, described inner sunken face is the hemisphere face that the center of circle is positioned on described luminous intensity distribution module optical axis, described inner sunken face is fixed on a described card, described convex outward is axle centered by described luminous intensity distribution module optical axis, each described light source is contained in each described inner sunken face respectively, be positioned at the circle centre position of described inner sunken face, the light that described light source sends keeps light type to be transmitted through described convex outward through described inner sunken face, reflect with the angular range of multiple equal portions at described convex outward, and the luminous energy of each part angular range is equal.
5. light filling assembly according to claim 4, is characterized in that, described transparent panel is disc-shaped structure.
6. light filling assembly according to claim 4, is characterized in that, described light source is Lambertian source.
7. light filling assembly according to claim 4, is characterized in that, described luminous intensity distribution module adopts optical-grade transparent plastic material to make.
8. a camera, it comprises camera lens and the light filling assembly as described in claim 4-7 any one, light hole described in described alignment lens.
9. camera according to claim 8, is characterized in that, described transparent panel is disc-shaped structure.
10. camera according to claim 8, is characterized in that, described light source is Lambertian source.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201310629342.5A CN104678682A (en) | 2013-11-29 | 2013-11-29 | Lens assembly, light supplementing assembly and a camera with light supplementing assembly |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201310629342.5A CN104678682A (en) | 2013-11-29 | 2013-11-29 | Lens assembly, light supplementing assembly and a camera with light supplementing assembly |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN104678682A true CN104678682A (en) | 2015-06-03 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201310629342.5A Pending CN104678682A (en) | 2013-11-29 | 2013-11-29 | Lens assembly, light supplementing assembly and a camera with light supplementing assembly |
Country Status (1)
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| CN (1) | CN104678682A (en) |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105306798A (en) * | 2015-10-27 | 2016-02-03 | 东莞市美光达光学科技有限公司 | Flashlight illumination module with short-range light ranging function and camera device |
| CN109973859A (en) * | 2017-12-27 | 2019-07-05 | 核动力运行研究所 | A kind of LED illumination structure of primary side of steam generator water chamber |
| TWI686658B (en) * | 2018-06-19 | 2020-03-01 | 吳易座 | Image-capturing apparatus including fill-in light devices with the same optical axis |
-
2013
- 2013-11-29 CN CN201310629342.5A patent/CN104678682A/en active Pending
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105306798A (en) * | 2015-10-27 | 2016-02-03 | 东莞市美光达光学科技有限公司 | Flashlight illumination module with short-range light ranging function and camera device |
| CN105306798B (en) * | 2015-10-27 | 2018-09-04 | 东莞市美光达光学科技有限公司 | A kind of flash lamp illumination module and photographic device with short distance ligh-ranging function |
| CN109973859A (en) * | 2017-12-27 | 2019-07-05 | 核动力运行研究所 | A kind of LED illumination structure of primary side of steam generator water chamber |
| TWI686658B (en) * | 2018-06-19 | 2020-03-01 | 吳易座 | Image-capturing apparatus including fill-in light devices with the same optical axis |
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| Date | Code | Title | Description |
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| C06 | Publication | ||
| PB01 | Publication | ||
| WD01 | Invention patent application deemed withdrawn after publication |
Application publication date: 20150603 |