KR101301878B1 - Visible Laser which can controlling nominal ocular hazard distance - Google Patents

Abstract

Visible light laser illumination according to the present invention, the laser output device 10 for outputting a visible light laser (11); A first optical lens 51 and a second optical lens 52 which are sequentially installed from the laser output device 10 so that the visible light laser 11 output from the laser output device 10 passes; Lens driving means (30) installed to move the first optical lens (51) so that the distance between the first optical lens (51) and the second optical lens (52) can be changed; A main controller 20 installed to control the operation of the lens driving means 30 and the laser output device 10; And a control unit. According to the present invention, it is possible to adjust the safety distance (NOHD) to ensure the safety of the target through divergence angle control and laser modulation.

Description

Visible Laser which can controlling nominal ocular hazard distance

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to visible light laser lighting, and more particularly, to visible light laser lighting capable of adjusting a nominal ocular hazard distance (NOHD).

Recently, LED lighting and laser lighting have been widely used as remote lighting. In particular, the LED is applied and used in many parts due to the low price and improved technology. However, unlike lasers with narrow beams of about 0.2 °, LEDs cannot implement beams with angles of several degrees or less, so they can be easily applied within 500m. Hard. Therefore, there is a need for laser lighting for long distance lighting.

Among lasers, green lasers (532 nm) and red lasers (635 nm or 660 nm) are widely used because they have the best visual effect in the visible region. Since the laser light will be used for the threat or non-threatening light, unlike the laser used for cutting in the industrial field, it is preferable to adjust the intensity of the laser light irradiated to the target.

For example, the beam irradiance or radiation exposure should be less than the maximum allowable exposure to the eye if you do not want to harm the person in the use of the laser, and if you want to do harm to the person, It is necessary to make the illuminance or radiation exposure larger than the maximum allowable exposure amount for the eye.

 The distance from the laser light source where the beam irradiance or exposure is equal to the maximum permissible exposure to the eye is called the nominal ocular hazard distance (NOHD), hereinafter referred to as the safety distance (NOHD). I would like to.

If the irradiance or radiation exposure of the laser beam can be freely adjusted based on the maximum allowable exposure to the safety distance (NOHD), it may be desirable to use visible light laser lighting as a variety of uses for hazards and dangers.

Accordingly, an object of the present invention is to provide a visible light laser light that can be utilized in various ways for risk as well as risk by adjusting a maximum allowable exposure amount for a safety distance (NOHD).

Visible light laser lighting according to the present invention for achieving the above object,

A laser output device for outputting a visible light laser;

A first optical lens and a second optical lens which are sequentially installed from the laser output device to pass the visible light laser output from the laser output device;

Lens driving means arranged to move the first optical lens so that a distance between the first optical lens and the second optical lens can be changed; And

A main controller installed to control operations of the lens driving means and the laser output device; And a control unit.

Here, the main controller,

A target distance input unit for inputting a target distance;

When the distance from the laser light source where the irradiance or the exposure of the laser beam is equal to the maximum allowable exposure amount to the eye is referred to as the safety distance (NOHD), the corresponding distance for each distance is the safety distance (NOHD). A NOHD data input storage unit for storing divergence angles to be input as NOHD data;

A NOHD data extracting unit extracting the corresponding NOHD data from the NOHD data input storage unit so that the target distance input from the target distance input unit corresponds to a safe distance (NOHD);

A risk level input unit for inputting a risk level to the target; And

A divergence angle adjusting unit configured to adjust the divergence angle by driving the lens driving means to correspond to the degree of risk by reflecting the degree of risk input through the risk level input unit to the NOHD data extracted by the NOHD data extraction unit; And the like.

Meanwhile, in the NOHD data input storage unit, a modulation duty for allowing the corresponding distance to be a safety distance (NOHD) for each laser output for each distance may be further input and stored as the NOHD data.

In this case, the main controller,

A blinking degree input unit for inputting a laser blinking degree; And

A modulation duty adjuster configured to adjust a laser modulation duty to correspond to the blinking degree by reflecting the blinking amount input through the blinking degree input unit to the NOHD data extracted by the NOHD data extracting unit; And the like.

The NOHD data input storage unit may further store and store, as the NOHD data, a modulation duty for each divergence angle such that the corresponding distance becomes the safety distance NOHD at the same laser output for each distance.

The NOHD data input storage unit may include an operation unit that inputs only NOHD data for some distances of each distance and calculates and calculates the rest by extrapolation or the like.

In the visible light laser illumination according to the present invention, it is preferable that a laser range finder is further provided to measure a target distance which is a distance to the target that the visible light laser reaches. In this case, the target distance input unit is the target distance from the laser range finder. Get input.

The visible light laser illumination according to the present invention preferably comprises beam pointer means for outputting a pointer laser having a wavelength different from that of the visible light laser to the same target.

According to the present invention, the visible light laser is used as a versatile use for harm and danger by freely adjusting the irradiance or radiation exposure of the laser beam based on the divergence angle control and laser modulation based on the maximum allowable exposure amount to the safety distance NOHD. Lighting can be utilized.

1 is a view for explaining the visible light laser illumination 100 according to the present invention;
2 is a diagram for explaining laser modulation;
3 is a view for explaining a divergence limit lock function;
4 is a view for explaining the beam pointer means 70;
5 and 6 are views for explaining an example in which the visible light laser illumination according to the present invention is applied to the position tracking radar system;
7 and 8 are views for explaining a position tracking radar system equipped with a distance checking automatic laser focusing system;
FIG. 9 is a diagram for describing the main controller 20 of FIG. 3.

Hereinafter, preferred embodiments of the present invention will be described in detail with reference to the accompanying drawings. The following embodiments are merely provided to understand the contents of the present invention, and those skilled in the art will be able to make many modifications within the technical scope of the present invention. Therefore, the scope of the present invention should not be construed as being limited to these embodiments.

1 is a view for explaining the visible light laser light 100 according to the present invention. As shown in FIG. 1, the visible light laser 11 output from the laser output device 10 is sequentially outputted through the first optical lens 51 and the second optical lens 52. The first optical lens 51 is movably installed through the lens driving means 30, for example, a step motor, so that the distance between the first optical lens 51 and the second optical lens 52 can be changed.

The reason why the first optical lens 51 is movably installed is to adjust the divergence of the laser. This divergence angle plays a decisive role in the safety distance (NOHD) as it is a major factor in determining not to emit excessive light to the target. If the laser beam output is the same, but the divergence angle is large, the exposure amount per unit area irradiated to the target will be smaller, and the safety distance (NOHD) will be closer, and if the divergence angle is smaller, the exposure distance per unit area will be greater and the safety distance (NOHD) will be farther away. .

On the other hand, although the second optical lens 52 may be installed to be movable, it is preferable to fix the second optical lens 52 because the second optical lens 52 will be installed in contact with the outside of the case of the laser illuminating apparatus 100. Therefore, it is preferable to install the first optical lens 51 to be movable than the second optical lens 52.

The main controller 20 controls the operations of the lens driving means 30 and the laser output device 10. The main controller 20 may be connected to the external controller 40 through a communication port so as to be remotely controlled from the outside.

FIG. 2 is a diagram for explaining laser modulation. As shown in FIG. 2A, when a CW laser modulates a modulation duty of 1: 1, the amount of light emitted per hour of the laser is reduced to 1/2, thereby reducing risk. Therefore, the safety distance (NOHD) is also reduced to 1/2. This flickering can enhance the visual effect even with low light output. These effects will be greater if the modulation duty is 1: 4 as in FIG. 2B. Using this principle, the safety distance (NOHD) can be as far or as close as necessary. In other words, if the amount of light reaching the safe distance (NOHD) is reduced by half by modulating the laser outputting the maximum allowable exposure dose to the safe distance (NOHD), the risk at that safe distance (NOHD) It can be expressed as being reduced to 1/2. The output modulation of the laser output device 10 may be performed through the control of the main controller 20.

Since the maximum allowable exposure dose corresponding to the safety distance (NOHD) will have to be determined and determined by the authorized agency for each distance, it cannot be specified numerically accurately.

Table 1 shows the results of experiments on the degree of glare felt by a person according to the degree of modulation. The number of respondents who felt glare by irradiating a laser for 20 seconds at a distance of 100 m for 5 seconds was checked. The laser used here is a laser that outputs a safety distance (NOHD) of 100m.

Flashing per second CW 1 to 2 Hz 3 to 4 Hz 5 to 6 Hz 7 ~ 8 Hz 9-10 Hz Number of Respondents 0 0 0 3 15 2

It was checked that there was no glare for continuous laser (CW) and 1-4Hz laser. This is because continuous lasers have glare when the subject is initially exposed, but the glare is not strong continuously. In the case of 1 ~ 4Hz lasers, the flashing is slow and the glare is small.

In the case of 5 ~ 6Hz laser, there is glare, but it is easy to recognize the surrounding objects. In case of 7 ~ 8Hz laser, the glare is most severe. Although the 9 ~ 10Hz laser has a better glare effect than the continuous laser, it is similar to the 5 ~ 6Hz laser.

3 is a diagram for describing a divergence limit lock function. The automatic divergence angle locking function referred to herein means that the user measures the distance to the target 90 to widen the divergence angle of the laser beam so that the distance corresponds to the safety distance (NOHD). On the contrary, it refers to an automatic function that narrows the divergence angle so that it does not correspond to the safety distance (NOHD) so that a hazard can be applied.

To this end, as shown in FIG. 3B, the distance between the laser and the target 90 is measured by the laser range finder 60. Laser divergence angle adjustment may be achieved by controlling the lens driving means 30 through the main controller 20.

FIG. 9 is a diagram for describing the main controller 20 of FIG. 3. Referring to FIG. 9, the maximum allowable exposure amount corresponding to the safety distance NOHD may be determined by measuring by an authorized institution for each distance. Of course, private organizations can present this data. In the NOHD data input storage unit 22, (i) divergence angle data for the corresponding laser output for each distance to be the safety distance (NOHD), and (ii) for each distance, the corresponding distance for each laser output is the safety distance. The modulation duty to make (NOHD) and (i) the modulation duty for each divergence angle for the corresponding distance to the safety distance (NOHD) at the same laser output for each distance are input and stored.

Here, (i) divergence angle data, (ii) modulation duty, and (iii) modulation duty for each divergence angle are virtually impossible to input, so if only a few pieces of data are input, extrapolation is performed for the remaining distances. It can be determined by a calculation such as). In addition, the modulation duty of each divergence angle of (i) can also be calculated from the divergence angle data of (i) and the modulation duty data of (ii). To this end, the NOHD data input storage 22 includes a calculator 23.

The target distance measured by the laser range finder 60 is input to the target distance input unit 21. The NOHD data extractor 24 extracts NOHD data for the target distance from the NOHD data input storage 22 so that the target distance provided from the target distance input unit 21 corresponds to the safety distance NOHD. For example, when the target distance is 100m, the divergence angle, the modulation duty, and the modulation duty for each divergence angle corresponding to the maximum allowable exposure amount for the case where the NOHD is 100m are extracted.

The degree of risk to be applied to the target is input to the degree of risk input unit 25, the degree of blinking is input to the blinking degree input unit 26. This input will be made by the user. The drive control unit 29 controls the divergence angle adjusting unit 27 and the modulation duty control unit 28 based on the information input from the risk level input unit 25 and the flashing degree input unit 26 to generate a desired divergence angle and a blinking laser. Will output

  For example, when the target distance provided through the target distance input unit 21 is 100m, the divergence angle corresponding to the case where the safety distance NOHD is 100m may be extracted, for example, 10 °. At this time, if the degree of risk is input through the risk degree input unit 25, the divergence angle adjusting unit 27 drives the lens driving means 30 so that the divergence angle becomes 12 °, which is larger than 10 °. Here, 12 ° is not mathematically calculated but merely presented here to explain that it is larger than 10 ° for convenience of explanation.

 At this time, if the blinking degree of the 1: 1 modulation duty is flickered through the inputting part 26, the amount of irradiation light decreases and the risk is reduced to 1/2 again by the 1: 1 modulation duty, so that the divergence angle is narrowed to 10 When set to °, a blinking laser of modulation duty 1: 1 is output. Of course, in this case, irrespective of the amount of irradiation light, the flickering degree of the laser may be 7 to 8 Hz per second through the input unit 26 (see Table 1) to turn off the person.

4 is a diagram for explaining the beam pointer means 70. In order to ensure safety of the laser lighting user, there may be a case where the laser lighting user wears protective glasses. In this case, the visible light laser 11 may not be visible due to the protective glasses. With this case in mind, the beam pointer means 70 is further provided.

The beam pointer means 70 is provided to output the pointer laser 12 at the same position as the visible light laser 11. At this time, the pointer laser 12 is preferably a low power class laser having a wavelength different from that of the visible light laser 11 so as to be visible through the protective glasses.

Visible light laser lighting according to the present invention can be utilized in various ways as follows.

5 and 6 are views for explaining an example in which the visible light laser illumination 100 according to the present invention is applied to the position tracking radar system. As shown in FIG. 5, the daytime is visible light laser according to the present invention continuously through the visible light laser illumination 100 along the target while tracking the position of the target by grabbing an image from the camera 300 without the IR laser light 200. Investigate (11). At night, the IR laser light 300 is added to capture the image from the camera 300 at night to track the position of the target, and to continuously display the visible light laser 11 according to the present invention through the visible light laser light 100 along the target. Investigate.

When the target is identified through the IR laser light 200 and the camera 300, the risk is also determined. If the target is dangerous, the target is damaged by reducing the divergence angle of the visible light laser 11 to be focused on the target. If the target is not dangerous, the divergence angle of the visible light laser 11 is increased to reduce the risk or stop the emission of the visible light laser 11 depending on the situation.

7 and 8 are views for explaining a position tracking radar system equipped with a distance confirmation automatic laser focusing system. Specifically, the laser rangefinder 60 as shown in FIG. 3 is installed in the camera 300 to adjust the divergence angle of the targeted visible laser 11 according to the distance, thereby emitting the high or low visible laser 11. To control.

According to the present invention, by adjusting the irradiance or the radiation exposure of the laser beam based on the maximum allowable exposure to the safety distance (NOHD) through divergence angle and modulation, it can be used for various uses for laser lighting and non-hazardous use. .

10: laser output device
11: visible light laser
20: main controller
21: target distance input unit
22: NOHD data input storage
23: calculator
24: NOHD data extraction unit
25: risk level input
26: flashing degree input section
27: divergence angle control unit
28: Modulation Duty Control
29: drive control unit
30: lens driving means
51, 52: optical lens
100: visible light laser light

Claims (7)

delete A laser output device for outputting a visible light laser;
A first optical lens and a second optical lens which are sequentially installed from the laser output device to pass the visible light laser output from the laser output device;
Lens driving means arranged to move the first optical lens so that a distance between the first optical lens and the second optical lens can be changed; And
A main controller installed to control operations of the lens driving means and the laser output device; And,
The main controller includes:
A target distance input unit for inputting a target distance;
When the distance from the laser light source where the irradiance or the exposure of the laser beam is equal to the maximum allowable exposure amount to the eye is referred to as the safety distance (NOHD), the corresponding distance for each distance is the safety distance (NOHD). A NOHD data input storage unit for storing divergence angles to be input as NOHD data;
A NOHD data extracting unit extracting the corresponding NOHD data from the NOHD data input storage unit so that the target distance input from the target distance input unit corresponds to a safe distance (NOHD);
A risk level input unit for inputting a risk level to the target; And
A divergence angle adjusting unit configured to adjust the divergence angle by driving the lens driving means to correspond to the degree of risk by reflecting the degree of risk input through the risk level input unit to the NOHD data extracted by the NOHD data extraction unit; Visible laser light, characterized in that comprises a. 3. The NOHD data input storage unit of claim 2, wherein the NOHD data input storage unit further stores and stores, as the NOHD data, a modulation duty such that a corresponding distance becomes a safety distance (NOHD) for each laser output for each distance.
The main controller includes:
A blinking degree input unit for inputting a laser blinking degree; And
A modulation duty adjuster configured to adjust a laser modulation duty to correspond to the blinking degree by reflecting the blinking amount input through the blinking degree input unit to the NOHD data extracted by the NOHD data extracting unit; Visible laser light, characterized in that comprises a. The visible light according to claim 3, wherein the NOHD data input storage unit further stores and stores, as the NOHD data, a modulation duty for each diverging angle such that the corresponding distance becomes a safe distance (NOHD) at the same laser output for each distance. Laser lights. The method according to any one of claims 2 to 4, wherein the NOHD data input storage unit includes an arithmetic unit which inputs only NOHD data for a partial distance of each distance and calculates and calculates the rest by extrapolation or the like. Visible laser light, characterized in that. The laser range finder of claim 2, further comprising a laser range finder configured to measure a target distance which is a distance to a target that the visible light laser reaches. Visible laser light, characterized in that receiving the distance. 3. The visible light laser illumination according to claim 2, further comprising beam pointer means for outputting a pointer laser having a wavelength different from that of the visible light laser to the same target.

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