CN2917136Y - Auto focus infrared video camera - Google Patents
Auto focus infrared video camera Download PDFInfo
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- CN2917136Y CN2917136Y CN 200620121665 CN200620121665U CN2917136Y CN 2917136 Y CN2917136 Y CN 2917136Y CN 200620121665 CN200620121665 CN 200620121665 CN 200620121665 U CN200620121665 U CN 200620121665U CN 2917136 Y CN2917136 Y CN 2917136Y
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- infrared
- image sensor
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- focal plane
- lens assembly
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Abstract
The utility model discloses an autofocus infrared camera, which is mainly utilized for active infrared closed circuit television monitoring system, and eliminates blurry images of the common infrared camera for the active infrared closed circuit television monitoring system while the camera is moved from the visible light environment to the infrared environment or from the infrared environment to the visible light environment. The camera is composed of a lens assembly, an image sensor assembly and a switching assembly. An optical detecting control assembly realizes automatic control over the switching assembly to make the lens assembly and image sensor assembly alternatively move in the position of focal plane of the visible light and infrared light, thus ensuring clear image of the infrared camera under the visible light and infrared light. The autofocus infrared camera can be widely applied to the active infrared closed circuit television monitoring system, and ensures clear image under both the visible and infrared light environment. The utility model is characterized in lower cost, stable operation, quick focusing and high precision.
Description
Technical field
The utility model relates to a kind of picture pick-up device, relates generally to the thermal camera in the active infrared closed-circuit TV monitoring system.
Background technology
At present, widely used thermal camera in the active infrared closed-circuit TV monitoring system, its core is mainly by image sensor module, lens assembly is formed, infrared lamp is integrated in the video camera or is installed in outside the video camera, when ambient light illumination is higher than set point, video camera output coloured image, infrared lamp is closed, when ambient light illumination is lower than set point, video camera output black and white image, infrared lamp is opened, lens assembly adopts fixed form to be connected with image sensor module, and camera lens uses tight shot or manual zoom lens.When video camera forwards infrared ray environmental work to or when the infrared ray environment forwards visible light environmental work to from the visible light environment, because visible light is different with ultrared wavelength, refractive index difference during by same camera lens, cause the imaging focal plane position to change, thereby cause thermal camera clear at visible light environment hypograph, it is fuzzy to forward infrared ray environment hypograph to, or infrared ray environment hypograph is clear, and it is fuzzy to forward visible light environment hypograph to.Address this is that four kinds of methods of main employing in the engineering at present: one is to use automatic focusing integrated camera; Two are to use special-purpose infrared focus non-migration camera lens; Three are to use the double image sensor video camera; Four are to use the Power focus camera lens, the increase engineering cost that these several schemes all can be in various degree, and the 4th kind of scheme will be regulated focusing by the remote manual mode, uses inconvenient.
The utility model content
In order to make the active infrared closed-circuit TV monitoring system, can both obtain distinct image at visible light and infrared ray environment, the utility model provides a kind of automatic focus thermal camera.It can detect under the control of control assembly at light, finishes focusing with image sensor module relative to switching the mode that moves with lens assembly, makes thermal camera can both obtain distinct image at visible light environment and infrared ray environment
This automatic focus thermal camera, its core is made of lens assembly, image sensor module and changeover module.According to visible light and infrared ray during by same camera lens, the visual light imaging position of focal plane is different with the infrared imaging position of focal plane, but two characteristics that the imaging focal plane fixed-site is constant, the lens assembly of original thermal camera is separated with image sensor module, be connected with changeover module with the image sensor module interface unit by the lens assembly interface unit respectively, lens assembly can be moved relative to switching at the drive lower edge of changeover module optical axis direction with image sensor module.When infrared video camera transfers the infrared ray environment to by the visible light environment, or when transferring visible light environmental work to by the infrared ray environment, the control signal control changeover module that is detected control assembly output by light moves, and imageing sensor imaging target surface always is on visual light imaging position of focal plane or the infrared imaging position of focal plane.Thereby reach the purpose that thermal camera can both blur-free imaging under visible light and infrared ray environment.
The utility model automatic focus thermal camera, solved widely used thermal camera in the present active infrared closed-circuit TV monitoring system, forward the infrared ray environment to or the infrared ray environment forwards the problem that the visible light ambient image fogs at the visible light environment, this automatic focus thermal camera have cost low, characteristics simple, easy to use are installed.The solution of Power focus camera lens is adopted in contrast, has the advantages that switch speed is fast, precision is high.Control signal is taken flexibly, can be obtained by infrared lamp or video camera interior lights detection components, also can add light separately and detect control assembly, can be used with the filter handoff technique.
Description of drawings
Below in conjunction with drawings and Examples the utility model is further specified
Fig. 1: automatic focus thermal camera structural representation
Fig. 2: the automatic focus thermal camera schematic diagram of under the visible light environment, working
Fig. 3: the automatic focus thermal camera schematic diagram of under the infrared ray environment, working
3. infrared imaging positions of focal plane, 1. lens assemblies, 2. visual light imaging positions of focal plane, 4. image sensor modules, 5. image sensor module interface units, 6. changeover modules, 7. visual light imaging position of focal plane position-limit mechanisms, 8. lens assembly interface units, 9. infrared imaging position of focal plane position-limit mechanism 10. light detect control assembly among the figure
Embodiment
The core component of forming changeover module in the present embodiment with small-sized DC 12V electromagnet and back-moving spring, the power supply of electromagnet is controlled by a miniature relay, and visible light and infrared ray operational environment switch-over control signal detect control assembly (10) by the light in the infrared lamp and provide.At first the lens assembly (1) with thermal camera is respectively installed on lens assembly interface unit (8) and the image sensor module interface unit (5) with image sensor module (4), guarantee that imageing sensor photosurface center overlaps with camera lens optical axis, and image sensor module (4) can relatively move along optical axis direction and lens assembly (1) with the action of changeover module (6), the scope that moves surpasses the scope of visual light imaging position of focal plane (2) and infrared imaging position of focal plane (3) substantially, next determine visual light imaging position of focal plane (2) and infrared imaging position of focal plane (3), carry out in two steps.
The first step, determine visual light imaging position of focal plane (2), under automatic focus thermal camera place and visible light environment, video camera output coloured image, light detects control assembly (10) output control signal, infrared lamp is closed, relay contact disconnects, electromagnet outage and under the effect of back-moving spring changeover module (6) image sensor module (4) and lens assembly (1) are pushed away closely, adjust the focusing ring and the visual light imaging position of focal plane position-limit mechanism (7) of camera lens, make video camera imaging clear, fixed lens and visual light imaging position of focal plane position-limit mechanism (7).
Second step, determine infrared imaging position of focal plane (3), the automatic focus thermal camera is in dark surrounds, video camera output black and white image, light detects control assembly (10) output control signal, the control infrared lamp is opened, relay contact closure, electromagnet powers up adhesive, changeover module (6) zooms out the distance of image sensor module (4) with lens assembly (1), adjusts infrared imaging position of focal plane position-limit mechanism (9) and image sensor module interface unit (5), and the direction of adjustment is that imageing sensor is moved to lens direction, clear until video camera imaging, fixing infrared imaging position of focal plane position-limit mechanism (9).
After visual light imaging position of focal plane (2) is determined with infrared imaging position of focal plane (3), image sensor module (4) will detect under the automatic control of control assembly (10) at light, between visual light imaging position of focal plane (2) and infrared imaging position of focal plane (3), switch to move, realize the purpose that video camera can both blur-free imaging under visible light and infrared ray environment.
Claims (5)
1. automatic focus thermal camera, mainly constitute by lens assembly and image sensor module, it is characterized in that also comprising changeover module, lens assembly is connected with changeover module with the image sensor module interface unit by the lens assembly interface unit respectively with image sensor module, lens assembly moves relative to switching at point-to-point transmission under the drive of changeover module with image sensor module, the action suspension control signal control of changeover module.
2. automatic focus thermal camera according to claim 1 is characterized in that the direction that lens assembly and image sensor module relatively move is along optical axis direction.
3. automatic focus thermal camera according to claim 1 is characterized in that described point-to-point transmission relative to switching 2 positions of moving, is visual light imaging position of focal plane and infrared imaging position of focal plane.
4. automatic focus thermal camera according to claim 1 is characterized in that the control signal of controlling changeover module is provided by light detection control assembly.
5. automatic focus thermal camera according to claim 3 is characterized in that described visual light imaging position of focal plane and infrared imaging position of focal plane, is limited by the mechanism that is no less than a position-limit mechanism or plays limit function, and its limited range is adjustable.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 200620121665 CN2917136Y (en) | 2006-07-06 | 2006-07-06 | Auto focus infrared video camera |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 200620121665 CN2917136Y (en) | 2006-07-06 | 2006-07-06 | Auto focus infrared video camera |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN2917136Y true CN2917136Y (en) | 2007-06-27 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN 200620121665 Expired - Fee Related CN2917136Y (en) | 2006-07-06 | 2006-07-06 | Auto focus infrared video camera |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN2917136Y (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103973982A (en) * | 2014-05-08 | 2014-08-06 | 山东神戎电子股份有限公司 | Night vision device capable of automatically focusing laser and focusing method |
| CN108593710A (en) * | 2018-06-14 | 2018-09-28 | 湖南大学 | A kind of the thermal imaging detecting system and method for highly reflective material surface defect |
-
2006
- 2006-07-06 CN CN 200620121665 patent/CN2917136Y/en not_active Expired - Fee Related
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103973982A (en) * | 2014-05-08 | 2014-08-06 | 山东神戎电子股份有限公司 | Night vision device capable of automatically focusing laser and focusing method |
| CN103973982B (en) * | 2014-05-08 | 2017-11-07 | 山东神戎电子股份有限公司 | A kind of automatic focusing laser night vision equipment and focus method |
| CN108593710A (en) * | 2018-06-14 | 2018-09-28 | 湖南大学 | A kind of the thermal imaging detecting system and method for highly reflective material surface defect |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| C17 | Cessation of patent right | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20070627 |