KR100744804B1 - Infrared lighting apparatus with interusability - Google Patents

Abstract

An IR(Infrared Ray) illumination apparatus having improved compatibility is provided to output a clear image by making an emitting angle of illumination always correctly stay on an object, wherein the emitting angle of the illumination interworks with a view angle in accordance with a zoom magnification. A CCD(Charge Coupled Device)(10) includes an image pickup zoom lens system(12) and a lens driving part(11) which generates a zoom control signal for view angle adjustment, and outputs an image pickup area, selected in accordance with the zoom control signal, as an image. An IR generator(25) outputs a light source when intensity of illumination around an object is lower than a predetermined level while an image is outputted through the CCD camera. An illumination zoom lens system(30) is disposed in parallel with an optical axis of the image pickup zoom lens system and connected to the lens driving part so that the illumination zoom lens system implements an emitting angle by interworking with view angle adjustment of the image pickup zoom lens system. A compatible assistant lens part(40) is coupled to a front end of the illumination zoom lens system so as to adjust an IR beam type.

Description

Infrared illuminator with improved compatibility {INFRARED LIGHTING APPARATUS WITH INTERUSABILITY}

1 is a schematic diagram of an image output device having an infrared illumination device according to the present invention;

2 is a conceptual view showing a reflection form of the infrared rays formed by the infrared illuminating device according to the present invention;

3A and 3B are conceptual views showing light beam shapes of a compatible auxiliary lens unit according to a C / CS mounted zoom lens system according to an exemplary embodiment of the present invention.

Figure 4 is a conceptual diagram showing the shape of the divergence angle with or without the objective lens unit according to the present invention

5 is a block diagram showing a conventional infrared lighting device

<Description of the symbols for the main parts of the drawings>

(10): CCD camera

(11): lens driver

(12): Zoom lens system for imaging

(20): infrared lighting device

25: Infrared Generator

30: zoom lens system for illumination

(31): objective lens unit

(35): coupling part

40: compatible auxiliary lens unit

The present invention relates to an infrared illumination device having improved compatibility, and more particularly, to clearly illuminate the image output of a subject even in bad weather or at night by interlocking with an angle of view of an electric zoom lens provided in a general image sensing device such as a CCD camera. Infrared illumination device for.

In general, closed circuit television systems using CCD cameras are used to prevent urgent disasters such as unauthorized entry, theft of goods, or fires in places such as general houses, department stores, banks, and performance halls. Even if such an accident occurs, it can be quickly processed afterwards. Also, in factories, it is used to check or manage the operation status of a machine or the flow of a process collectively.

This surveillance system captures a number of surveillance zones to be managed with each video camera and checks multiple surveillance zones through a monitor installed at a specific location.If necessary, only the desired scene is recorded on a video cassette recorder (VCR) or digital video (DVR). You can also record using the Recorder. Therefore, it is possible to carry out effective crime prevention and disaster prevention with a small number of people.

In addition, the CCD camera used as a spiritual output medium for monitoring can clearly capture the surveillance area during the day, but in order to solve the difficulty of shooting in the condition of low ambient light such as in bad weather or at night, Infrared LDs and LEDs, which emit light in a wavelength band that is difficult to see visually, are built in to emit light at night.

In addition, the recent advancement in image output equipment, such as surveillance CCD cameras have been equipped with a CCD camera that can adjust the angle of view through the motorized zoom lens for effective monitoring of subjects located near or far away from the subject. By providing an divergence angle adjusting means of the infrared illuminating device that can be linked to the more effective to output the image of the subject.

As an infrared illuminating device for adjusting the light divergence angle, Korean Patent No. 0518250 "Infrared illuminating device for adjusting light divergence" has been introduced, and will be described in brief with reference to FIG. 5.

A CCD camera 1 for detecting a subject and automatically outputting an image by focusing the zoom lens; A signal detector (2) for detecting an auto iris signal for adjusting the exposure of the CCD camera (1) and a focus adjustment signal for adjusting the focus of the zoom lens according to the perspective of the subject; Compare / analyze the auto iris signal and the focus control signal applied from the signal detector 3 to adjust the infrared light output according to the illuminance around the subject, and adjust the angle of view of the infrared lens according to the angle of view of the zoom lens of the CCD camera. A control unit 3 for outputting a control signal for performing the control; An infrared light source unit 4 which adjusts the output of the infrared light source according to a control signal applied from the control unit 3 so that the subject can be photographed even at a low illuminance; The first optical lens for collecting the light emitted from the infrared light source unit 4, the second optical lens for adjusting the divergence angle of the light collected by the first optical lens, and the dispersion of light emitted from the second optical lens An infrared lens unit 5 forming a blocking third optical lens; The lens driver 6 adjusts the divergence angle of the infrared light by moving the second optical lens of the infrared lens unit 5 according to a control signal applied from the controller 3.

This prior art allows the control unit to detect the angle of view of the zoom lens for imaging of the camera to adjust the infrared lens unit through which the divergence angle of the infrared light source can be linked to the angle of view.

However, in general, CCD cameras installed in the detection zone generally have many design differences depending on the size of the CCD camera image sensor, the motorized zoom lens having various zoom magnification, the mounting method of the zoom lens, or the manufacturer. There is still less compatibility with each other than the goods.

In order to implement the above-described infrared illumination device in various kinds of CCD cameras as described above, there is a difference in the above specifications. In operation of the actual infrared illumination device, the compatibility with each CCD camera is easily combined and interlocked. In order to maintain it, each installation had to be equipped with an infrared lighting device.

In addition, since the optical axis of the CCD camera and the optical axis of the infrared illumination device are arranged side by side in parallel to each other, the subjects outputted to the image sensor (CCD) are actually lowered in the illuminance of a certain outside, so that a clear image of the entire subject is obtained. Could not be obtained (see Fig. 4).

The present invention has been made to solve the above-described problems, the object of which is to use a zoom lens system synchronized with the zoom lens system for imaging installed in the CCD camera as it is, divergent angle of view and illumination without the need for a separate lens controller By simply interlocking the angles and by synchronizing the auxiliary lens unit according to the specifications of the existing commercially available zoom lens system, the motorized zoom lens unit / zoom lens mount according to the size / various zoom ratio of the image sensor (CCD) of the CCD camera It is to make it easy to overcome incompatibilities caused by many design differences between methods and manufacturers.

Another object of the present invention is to provide a red-line lighting apparatus for outputting a clear image as a whole so that the divergence angle of the illumination linked with the angle of view according to the zoom magnification always stays exactly on the subject.

The present invention, which achieves the above object and performs the problem for eliminating the defects of the related art, in the infrared illumination device which can take a picture of a subject located in a low illumination area,

A CCD camera configured to include a zoom lens system for generating a zoom adjustment signal for adjusting an angle of view of a subject according to a perspective, and outputting an image capturing area selected according to the angle of view adjustment as an image;

An infrared generator for outputting a light source when the illuminance around the subject is lower than a predetermined level among the images output by the CCD camera;

An illumination zoom lens system arranged in parallel with an optical axis of the zoom lens system for imaging and connected to a lens driver for generating a zoom adjustment signal toward the zoom lens system for realizing divergence angle in conjunction with an angle of view adjustment of the zoom lens system for imaging. Wow;

A compatible auxiliary lens unit coupled to the front end of the illumination zoom lens system and configured to adjust the shape of the light beam according to the incident pupil of the illumination zoom lens system from the light source output from the infrared generator positioned at the front end thereof; Characterized in that consisting of.

In addition, the rear end of the illumination zoom lens system spaced apart from the optical axis of the zoom lens system for imaging is characterized in that it comprises a magnified objective lens to expand the divergence angle to surround the angle of view of the zoom lens system for imaging.

Hereinafter, an embodiment of the present invention will be described in detail with reference to the accompanying drawings.

1 is a conceptual diagram of a monitoring image output device having an infrared light emitting apparatus according to the present invention, Figure 2 is a conceptual diagram showing a diverging state of the light beam formed by the infrared lighting apparatus of the present invention,

The present invention includes a lens driving unit (11) for generating a zoom adjustment signal for adjusting the angle of view of a subject according to the perspective by including a zoom lens system (12) for imaging as an image output device. And a CCD camera 10 for outputting the light source, and an infrared light generator 20 that outputs a light source when the illuminance around the subject is lower than a predetermined level during the image output through the CCD camera 10. And an illumination zoom lens system disposed in parallel with an optical axis of the imaging zoom lens system 12 and adjusting a divergence angle in cooperation with the imaging zoom lens system 12 through a zoom adjustment signal of the lens driver 11. 30) and disposed between the infrared generator 25 and the zoom lens system 30 for illumination to maintain a proper incident light toward the illumination zoom lens system 30 coupled to the light source output from the infrared generator 25 to the rear. ore The diameter of the control consists of a possible compatibility auxiliary lens unit 40.

The CCD camera 10 having the zoom lens system 12 for capturing the image may be controlled according to an iris signal and an object's perspective to automatically adjust the degree of exposure according to the brightness of the image signal detected by the image sensor CCD. Detecting a focus control signal to perform an autofocus function, the detected signal is output as an electrical signal through the lens driver 11 to drive the zoom lens system for imaging 12, such a zoom lens system ( 12), the angle of view of the subject is adjusted within the range of the zoom ratio.

The infrared ray generator 25 is disposed in parallel with the CCD camera 10 to detect an iris signal and a focus control signal output through the CCD camera 10 and the illumination to the surroundings of the object to be output. Infrared light source is generated when the output image information is difficult to determine). It is preferable that the infrared ray generator 25 is installed with a known laser diode (LD) or a light emitting diode (LED).

On the other hand, the infrared illumination device 20 according to the present invention comprising the infrared ray generator 25 is a CCD camera produced in the above various specifications (zoom magnification, zoom speed, angle of view, lens combination mount, manufacturer-specific design) Irrespective of the type, it is simply interlocked with the angle of view adjustment operation of the selected installed CCD camera 10 to form a diverging angle corresponding to this angle of view, which greatly improves the efficiency of infrared illumination and compatibility by device.

More specifically, the optical zoom lens system 12 is disposed in parallel with the optical axis of the imaging zoom lens system 12 and connected to the lens driver 11 for generating a zoom adjustment signal toward the imaging zoom lens system 12. 12) in conjunction with the angle of view adjustment to maintain the same divergence angle as the angle of view or to configure a zoom lens system for illumination 30 that can implement a divergence angle larger than the angle of view. As shown in FIG. 1, the illumination zoom lens system 30 is preferably an electric zoom lens having the same specifications as the imaging zoom lens system 12, and the lens driver 11 of the CCD camera 10. By simultaneously receiving an electrical signal output to the zoom lens system for imaging 12 through the angle of view adjustment of the zoom lens system for imaging 12 and the divergence angle of the illumination zoom lens system 30 to be made in conjunction.

In this case, the illumination zoom lens system 30 is parallel to the optical axis of the imaging zoom lens system 12 of the CCD camera 10 and arranged in parallel with the infrared generator 25 as described above. Even if the divergence angle works correctly, a divergence angle that is shifted from the angle of view is formed for the difference of the distance, so that the outer part of the output image appears a little dark, so as to prevent the lighting zoom lens system ( 30) further includes an objective lens unit 31 which enlarges and compensates the divergence angle shifted from the center of the view angle by a spaced difference (see FIG. 4).

Subsequently, as the infrared illumination device 20 according to the present invention, a light source disposed between the infrared ray generator 25 and the zoom lens system 30 for illumination to form a longitudinally elongated shape generated from the infrared ray generator 25 is used. A compatible auxiliary lens unit 40 is formed so as to form a light beam close to a circle, and to form such a light beam into a parallel light suitable for the incident pupil required by the illumination zoom lens system 30. That is, the monitoring of the device according to the incident pupil required by the zoom lens system according to the specifications of the imaging zoom lens system 12 and the illumination zoom lens system 30 which are generally determined according to the type of the CCD camera 10 according to the purpose of use. It is set in advance before driving.

As shown in FIG. 2, the light source is converged or diverged close to the circular shape using, for example, a cylindrical lens part 41, and a collimating lens part 42 is used to form parallel rays, but the collie is collimated. The mating lens unit 42 adjusts the diameter D of the parallel light outputted to be moved forward or backward by the external driving unit (not shown) toward the circumferential lens unit 41, and is coupled to the rear end 35. It exactly matches the incident pupil of the illumination zoom lens system 30 coupled through). In this case, as shown in FIG. 1, the driving unit of the collimating lens unit 42 is connected to the lens driving unit 11 of the CCD camera 10 and is electrically configured or operated from an electrical signal. The rotary adjuster connected to the unit 42 and provided to the outside of the interchangeable auxiliary lens unit 40 allows the initial installer to directly operate.

In the implementation of the infrared illuminating device 20 as described above, when the actual device is installed, the infrared generator 25 may be integrally provided at the tip of the compatible auxiliary lens unit 40.

Referring to FIG. 3A and FIG. 3B, the installation step of the infrared lighting device having the advantage of installation compatibility according to the specifications of the CCD camera 10 will be described below.

In general, the image capturing area is determined according to the size of the CCD sensor of the CCD camera, and the imaging lens unit determined therein is a C-mount type that requires relatively large light incident pupils, and a relatively small light incident pupil pupil. Consider the case where the CCD cameras provided differently according to the purpose of using the CS-mounted type required to install the infrared illuminating device according to the present invention.

First, as shown in FIG. 3A, in the case of a CCD camera having a C-mount imaging zoom lens system, a C-mount zoom lens system 30c is adopted as an illumination zoom lens system for adjusting the divergence angle that is the same as the angle of view adjustment. The collimating lens unit 42 of 40 is moved backward in the optical axis direction to form a parallel ray having a diameter D1 corresponding to the incident pupil required by the C-mount zoom lens system 30c, thereby providing substantial image sensing work. You will perform a simple installation preparation step before running.

Alternatively, as shown in FIG. 3B, in the case of a CCD camera using the CS-mounted zoom lens system, a CS-mounted zoom lens system 30cs is adopted as an illumination zoom lens system for adjusting the divergence angle that is the same as the angle of view adjustment. The collimating lens unit 42 of 40 is advanced in the optical axis direction, corresponding to the incident pupil required by the CS-mounted zoom lens system 30cs (generally requiring smaller incident pupil than that of the C-mount zoom lens system). By forming a parallel beam having a diameter (D2) to perform a simple installation preparation step before performing the actual image sensing operation.

In this case, the C-mount zoom lens system 30c or the CS-mount zoom lens system 30cs coupled with the compatible auxiliary lens unit 40 according to the present invention is separated according to the lens mounting method. 35 may be coupled using a separate adapter.

As described above, the infrared illumination device according to the present invention, in which selective initial setting is completed according to the specifications of the CCD camera, is provided with a lens driving unit provided in the CCD camera 10 together with the image output of the subject within a certain level of illuminance. An image zoom and divergence angle are interlocked at the same time through the zoom lens system 12 and the illumination zoom lens system 30 simultaneously receiving electrical driving signals through the same, for example, the zoom lens system 12 for imaging. In accordance with the movement from the minimum zoom magnification to the maximum zoom magnification), the zoom lens system 30 for lighting is implemented with the minimum divergence angle at the maximum divergence angle.

In addition, as shown in FIG. 4, the area photographed according to the angle of view adjustment through the magnification objective lens 31 provided at the rear end of the zoom lens system 30 for illumination stays within a range of illumination that is always emitted. A clear image in the area is obtained.

The present invention is not limited to the above-described specific preferred embodiments, and various modifications can be made by any person having ordinary skill in the art without departing from the gist of the present invention claimed in the claims. Of course, such changes will fall within the scope of the claims.

As described above, the present invention dramatically improves the linkage of the light divergence angle which is automatically linked with the change of the angle of view of the camera, and also forms the divergence angle at all times to include the angle of view for the subject, thereby improving the lighting efficiency of the subject. Clear images can be output.

In addition, the lighting auxiliary lens unit that synchronizes the incompatibility according to the manufacturer or camera specifications, it is possible to maintain compatibility through a simple installation setting for the video output equipment of various specifications, according to the manufacturing cost of equipment There is an effect that can be reduced.

Claims (6)

In the infrared illuminating device to shoot a subject located in the low light area, A CCD camera configured to include a zoom lens system for generating a zoom adjustment signal for adjusting an angle of view of a subject according to a perspective, and outputting an image capturing area selected according to the angle of view adjustment as an image; An infrared generator for outputting a light source when the illuminance around the subject is lower than a predetermined level among the images output by the CCD camera; An illumination zoom lens system arranged in parallel with an optical axis of the zoom lens system for imaging and connected to a lens driver for generating a zoom adjustment signal toward the zoom lens system for realizing divergence angle in conjunction with an angle of view adjustment of the zoom lens system for imaging. Wow; A compatible auxiliary lens unit coupled to the front end of the illumination zoom lens system to adjust an infrared ray shape according to an incident pupil of the illumination zoom lens system from a light source output from the infrared generator positioned at the front end thereof; Infrared illumination device to improve the compatibility, characterized in that consisting of. The method of claim 1, The rear end of the illumination zoom lens system spaced apart from the optical axis of the imaging zoom lens system is arranged to include a magnified objective lens to expand the divergence angle to surround the angle of view of the zoom lens system for imaging, characterized in that the infrared light enhanced the compatibility Device. The method of claim 1, The compatible auxiliary lens unit comprises a circumferential lens unit for forming a light source output from the infrared generator with a circular divergence angle; A collimating lens unit for forming a parallel beam for injecting a light beam passing through the circumferential lens unit into an illumination zoom lens system coupled to a rear end thereof, and for adjusting the diameter of the parallel beam outputted forward or backward toward the circumferential lens unit; Infrared illumination device to improve the compatibility, characterized in that consisting of. The method of claim 3, Infrared illumination device to improve compatibility, characterized in that the outside of the compatible auxiliary lens unit is provided with a rotary controller for driving forward or backward in the collimating lens unit therein. The method of claim 1, The compatibility auxiliary lens unit and the illumination zoom lens system is an infrared illumination device having improved compatibility, characterized in that coupled using a separate connection adapter. The method of claim 1, And the zoom lens system for imaging and the zoom lens system for illumination are electric zoom lenses having the same zoom magnification which is operated by receiving a zoom adjustment signal of the lens driver.

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