Searchlight with frenel's lens

FIELD: the invention refers to searchlights.

SUBSTANCE: the searchlight with Frenel's lens with a regulated angle of aperture of coming out beam of light has preferably an elliptical reflector, a lamp and at least one Frenel's lens. The Frenel's lens has a diffuser, at that the diffuser is fulfilled of round form and is located only in the center of the Frenel's lens or the diffuser is fulfilled with changing degree of dispersion in such a way, that more powerfully dispersed fields are located in the middle of the diffuser and fields dispersed in a less degree are located along its edge. The Frenel's lens with the diffuser form a system of light displacement which changes the share of dispersed light in relation to the share of geometrically and optically projected light and thus changes correlation of light displacement as a function of installing a searchlight with Frenel's lens and also has a real point of focusing of a reflector removed from the reflector. The Frenel's lens is a flat-convex lens with chromatic corrected properties of projection. The covering of the Frenel's lens has a system of dielectric interference layers that changes the spectrum of light passing through it. An auxiliary reflector is installed between the Frenel's lens and the reflector.

EFFECT: provides high degree of effectiveness of obtaining of even coming out of light.

17 cl, 5 dwg

 

The technical field to which the invention relates.

The present invention relates to the spotlight with Fresnel lens with adjustable angle of aperture of the output beam of light, which preferably contains an elliptical reflector, a lamp and at least one Fresnel lens.

The level of technology

Normal lights with Fresnel lens used in the technique of lighting equipment, usually contain a lamp, Fresnel lens and an auxiliary spherical reflector. The filament of the lamp is usually essentially motionless in the center of the spherical reflector. Part of the light emitted by a lamp, therefore, reflected back at her and amplifies the light emitted in the forward hemisphere. Such forward looking light colliery using a Fresnel lens. The degree of collimation, however, depends on the distance between the Fresnel lens and the lamp. The narrow collimation get when the filament of the lamp is located in the focal point of the Fresnel lens. Receive mode quasi parallel optical path, also called a mode of a light spot. The angle of aperture of the output beam of light can be continuously increased, while reducing the distance between the Fresnel lens and the lamp. Receive mode divergent optical path, which is also called flood light.

The lack of such Pro is Ktorov, however, is the low efficiency of light emission, in particular, when setting the mode of the light spot, because only a relatively small spatial angle of the sphere of the lamp radiation is captured by the Fresnel lens. Another negative effect arises due to the fact that a large part of the light reflected by the spherical reflector, falls again on the filament of the lamp, where it is absorbed and additionally heats the filament of the lamp.

In DE 3919643 A1 describes floodlight with reflector, aperture and Fresnel lens. In this spotlight lighting change by adjusting the light source. This changes the brightness of the light. The adjustment of the distance between the top (the focal point of the Fresnel lens and the reflector and between the aperture and the reflector is used for brightness control.

In DE 3413310 A1 describes the spotlight, containing the lamp and the reflector or the lamp, and a collecting lens. Spotlight, in addition, contains a diffuser or a mirror set at an angle of 45°. The light is deflected by the mirror and is scattered by the diffuser. The change in the angle of propagation of the beam of light produced by the movement of the cone.

In DE 10113385 C1 described spotlight with Fresnel lens, in which the Fresnel lens is a collecting lens, the focal point of which is mounted on the side of the light source and mode of the light spot is, approximately at the focal point of the elliptic reflector, located further away from the reflector. This prevents excessive heating of the lamp in the reverse reflection of light. In addition, the ratio of the distance between the lamp and the reflector and the distance between the reflector and Fresnel lens regulate independently, using carefully configured guide. However, this device requires the use of additional mechanical tools.

However, with increasing degree of miniaturization of the light source, for example, in the case of application of the discharge lamps high-pressure high power output light field may even appear even more strongly pronounced dark area, located in the center, which can not be accounted for scattering instruments located inside the reflector, or which can be compensated using them only for large loss of light. Even ordinary scattering instruments used to prevent the formation of the image of the center of radiation of the light source, allow to solve the problem only partially, if at all, because at least the Central aperture cone shading should be evenly lit at all installations spotlight with Fresnel lens. However, in particular, set the mode of the light spot is right leads to large losses of light, because, although in this case the shaded area has a very small angle of aperture, the whole area of the Fresnel lens, however, is used to dissipate the field light in a conventional Fresnel lenses, in which they use the tools of dispersion.

Disclosure of inventions

The present invention is directed to the spotlight with Fresnel lens, which makes it possible to obtain uniform light output. This spotlight with Fresnel lens must also be simple and not costly to manufacture.

This problem was suddenly solved using spotlight with Fresnel lens according to claim 1 of the claims and the lighting unit 17 of the claims.

The authors of the present invention found that a large light loss can be prevented in a surprisingly simple way by using a diffuser. In this case, especially, it is preferable to set the cone on the Fresnel lens, which, in particular, preferably has a round shape and is located in the center of the Fresnel lens.

In this embodiment, the shaded area in the middle of the field lighting can be very effectively excluded from the settings of any of the operating modes of the spotlight with Fresnel lens, and not having a large loss of light when installing the reflector mode light spot.

Unexpectedly, it was determined that geom traceski optical path of the light beam, emerging from the reflector illuminates the smaller area at the exact location of the Fresnel lens, the greater the proportion of scattered light.

The authors of this proposal have used this effect to create automatic or adaptive system for mixing light, in accordance with the present invention, which synchronously adjustable spotlight with Fresnel lens only that part of the scattered light, which is necessary for such installation, mixed with geometrically-optically projected light.

The ratio of mixing of light, which can be almost optimally adapted to the distribution of light required in each case, for the sake of brevity, the following description will be called the mixing ratio.

This automatic light mixing system provides the right ratio of mixing, essentially, for any installations of the reflector and therefore consistently provides the possibility of forming a very evenly illuminated light field without undesirable loss scattering.

In this case, the mixing ratio for the Fresnel lens, illuminated over the entire surface, can be determined by selection of the diameter of the cone in proportion to the rest of the field Fresnel lens, and the angle of aperture of the scattered light can be determined by the scattering properties of a Fresnel lens.

The scattering effect can,in addition, change in the integrated diffuser so that, for example, more strongly scattering region can be located in the middle of the cone, and to a lesser extent of the scattering region can be located on its edge. Because of this, it is very much focused beam of light will be further expanded, and this provides an opportunity to get an exceptionally wide angle of illumination.

Alternatively, the edge of the diffuser may be formed not only drastically ending, but with a gradual decrease of the scattering effect, here again, he will be held under the Fresnel lens or on top of it. This makes it possible to obtain other adaptation of a mixed, depending on settings.

In preferred versions of the diffuser can be located on the entrance side of light or side light output. In addition, the possible preferred variant of installation of diffusers on the entrance side of light and side light output. In the latter case it is even possible to use differential scattering diffusers, such as diffusers, which have a different degree of dispersion, depending on the situation.

We will refer to an application entitled "Optical arrangement with fresnel lens", filed by the present Applicant on the same day, the open content which is contained entirely in ka is este links in the disclosed content of the present application.

Evenness of illumination across the field of light at a time is how to install mode light spot and for installation in flood light mode, as shown in the example shown in figure 5.

In accordance with the present invention proposed the reflector is elliptical with a large aperture. Setting spot is adjusted so that the filament lamp emitter with a black body, in particular a halogen lamp or an arc discharge lamp, set in the focus point of the ellipsoid on the side of the reflector, and a real focal point of the Fresnel lens located on the side of the reflector, set approximately on the second focus point of the ellipsoid, which is located away from the reflector.

Before entering the Fresnel lens is reflected by the reflector, the light is almost completely focused at the point of focus of the ellipsoid, remote from the reflector. The image of the filament of the lamp or discharge arc, located in the point focus Fresnel lens on the side of the reflector after passing through the Fresnel lens is projected to infinity, so that its light is converted into an almost parallel beam of light.

With proper choice of the angle of aperture of the reflector and Fresnel lens light reflected by the reflector, will be almost completely collected by the Fresnel lens and passing the sterile forward in the form of a narrow beam spotlight.

In one embodiment of the present invention, the elliptical reflector is made of a metal or a transparent dielectric material. As materials of the dielectric preferably use glass and polymeric materials, i.e. plastic, which may be a coating of metal, for example aluminum.

Alternatively or in addition, to obtain a reflective surface in an embodiment with a transparent dielectric material on one of the two surfaces of the reflector or on both of its surfaces coated in the form of optically thin layers. Floor Fresnel lens preferably contains a system of dielectric interference layers that modify the spectrum of light passing through them. Because of this, the visible components of radiation can mainly be reflected, and invisible components, in particular components of thermal radiation that can pass without reflection.

In General, both the reflector and Fresnel lens and/or diffuser can be deposited coating at least one side, for example, in a layer that is resistant to scratches, and/or antireflective layer in the case of the use of plastic.

In another preferred embodiment of the present invention, the metallic coating is applied on one and on both main surfaces of the reflector.

In another alternative configuration, the reflector can also be made as a metal reflector without coating or with a dielectric or metallic coating to provide the required spectral properties and corrosion resistance.

In a preferred embodiment of the present invention contains the spotlight with Fresnel lens in which the light-reflecting surface of the reflector is made of structured, preferably using subsurface layers or faces, which scatter light, and at the same time or none of them, either one or both surfaces of the Fresnel lens is structured so that they scatter light. Thus, it provides a fixed amount of superposition of scattered light from the geometrically-optically projected light, compensating the dark rings in the light field.

The Fresnel lens is preferably pre-stressed, preferably pre-stressed by thermal method, so it has high strength and thermal stability.

In accordance with the present invention, the floodlight can be used for medicine, architecture, cinema, theatres, studios, photo studios and lighting.

In preferred versions of the diffuser can be located either on the entrance side of light is, or on the exit side of the light. In a preferred embodiment, moreover, the diffusers are installed on the entrance side of light, and on the output side of the world. In the latter embodiment, it is even possible to use diffusers in a different light-scattering, for example one of which is different scatters light, depending on the situation.

Brief description of drawings

The present invention will be described in more detail by the example of preferred embodiments and with reference to the accompanying drawings.

The figure 1 shows an embodiment spotlight with Fresnel lens when setting the mode of the light spot, which is estimated to impose a point of focus of the reflector located at a distance from the reflector, left point focus Fresnel lens.

The figure 2 shows an embodiment spotlight with Fresnel lens, presented in figure 1, in the first mode, flood light, at this point the focus of the reflector located at a distance from the reflector, installed near the surface of the Fresnel lens.

The figure 3 shows an embodiment spotlight with Fresnel lens presented on figure 1, the installation mode of the light spot, with the auxiliary reflector, through which additional the first portion of the light is deflected by the reflector, and then the lens Panel is.

The figure 4 shows the collecting Fresnel lens diffuser located at the center.

The figure 5 shows the representation of the logarithmic dependence of light intensity on the angle of aperture of the spotlight with Fresnel lens installed in the mode of a light spot and one flood light modes.

The implementation of the invention

In the following detailed description assumes that the same numbers of reference marked elements that are the same or have the same effects in different respective versions of the runtime.

Let us first consider figure 1, which presents an embodiment spotlight with Fresnel lens mode light spot. Spotlight with Fresnel lens, essentially contains the reflector 1 elliptical lamp 2, which may be an incandescent lamp, in particular a halogen lamp, light emitting diode, a set of light-emitting diodes or gas discharge lamp, and the Fresnel lens 3, which is a collecting lens, preferably PLANO-convex Fresnel lens.

In the figure 1 at the point F2 of the elliptical focus of the reflector 1, which is located away from the reflector, approximately superimposed real or positive point F3 focusing on the left side of the lens 3 Fresnel.

Beam 4 light output is ASCII from the spotlight, indicated on the drawings very schematically only its external peripheral rays.

The figure 1 also presents the distance between the Fresnel lens and the front edge of the reflector 1.

The installation of the light spot is adjusted so that the filament lamp or a gas discharge arc lamp 2 is set at the point F1 focus of the elliptical reflector, which is located on the side of the reflector.

With this installation, the light reflected by the reflector 1, almost entirely directed at the point F2 focus of the ellipsoid 1. Left a positive or a real point F3 of the focusing lens 3 Fresnel with approximately coincides with a point F2 focus of the ellipsoid reflector.

The figure 1 also shows how in the near zone 5 hole inside the reflector 2 forms a shaded area 6 in the parallel optical path length of the field 4.

Inside the lens 3 Fresnel center is a round cone 7, which forms a certain ratio of scattered light and a certain angle of aperture of the scattered light. So, get a certain mixing ratio of scattered light with respect to light, geometrically-optically projected through lens 3 Fresnel.

Alternatively, this variant of execution of the diffuser 7, in another embodiment, the effect of dispersion of continuous what about the changes along the radius of the diffuser 7, so more strongly scattering region located in the middle of the diffuser 7 and less strongly scattering region are located on its abruptly ending edge.

In yet another alternative embodiment, the edge of the diffuser not only abruptly ends, but it is also designed in such a way that the scattering effect is gradually reduced, and it can also pass under or over the Fresnel lens.

Other adaptation of mixing depending on the settings do on a regular basis in the same way, so the specialist in the art will be able to obtain optimal mixing evenly lit field of light or even field of light with a higher local intensity generated in a specific way.

In figure 1, in addition, it is shown that only a small portion of the total light passes through the diffuser 7, the installation mode of the light spot.

The diffuser 7 provides a very uniform illumination, as shown for installation in a mode of a light spot by the line 8 in figure 5, which shows a logarithmic representation of the dependence of light intensity on the angle of aperture of the spotlight with Fresnel lens.

The figure 2 shows an embodiment spotlight with Fresnel lens shown in figure 1, in the first mode, flood light, at which point F2 of the focusing OTP is gates 1, which is located away from the reflector, set approximately on the surface of the lens 3 of Fresnel, which is located closer to the reflector.

The degree of bias in relation to the installation of a light spot in a certain way is changed by a mechanical guide.

This structure essentially corresponds to the structure of the spotlight with Fresnel lens described with reference to figure 1.

In figure 2, however, can clearly be seen that as the angle of aperture of the output beam 4 light and the shaded area 6 increased.

In addition, because of the very high proportion of the light falling at such installation on a very small area in the middle of the diffuser 7, this area can be appropriately configured so that its front petal scattering approximately compensates required by the shaded area 6 in the far zone or at a great distance. It should also make reference to figure 5, which uses line 9 presents, as an example, the ratio of light for installation in flood light mode.

In one embodiment, the distance change can be done manually, and for this purpose you can use the axial guiding of optical components. Alternatively, the optical components can also assests the TB with the help of the engine.

Figure 3 shows another preferred embodiment of. In this embodiment, which essentially corresponds to execution options described above, except that the additional auxiliary reflector 18, the light from the lamp 2, which could be distributed in the right direction in the figure 3 and which never would get on the reflector 1, in fact, is rejected on the reflector 1 through the auxiliary reflector 18. This provides not only the possibility of using light, which is presented only as an example, the optical path 19 and which would not be used for lighting without auxiliary reflector, but it is also possible to ensure the best use to provide the desired light distribution the part of the world, which otherwise directly fell on the Fresnel lens 3.

The shape of the auxiliary reflector 18 is preferably chosen such that light reflected them, misses again in the tool generate light based on the lamp 2, for example, misses on the filament or in the discharge zone, and does not result in excessive additional heat.

Alternatively, the auxiliary reflector 18 can be installed inside or outside the glass of the lamp housing 2. The glass of the lamp housing with this purpose can in order to have the proper form, to provide the desired directional effect of the reflected light.

The figure 4 shows an example of a lens 3 Fresnel diffuser 7 in accordance with the present invention. The Fresnel lens 3 has a transparent body 10 of the base and the system 11 rings of the Fresnel lens 11 and the ring segments 11, 12, 13 of the lens, inside of which has a circular diffuser 7.

The diffuser 7 has a definite structure or made with sides 15, 16, 17, showing the scattering behavior, which can be accurately determined within wide ranges, as described in the patent application DE Germany 10343630.8 made by the Applicant of the present application, entitled "Diffuser", which was filed on September 19, the Office of patents and trademarks in Germany. Open the content of this Application is fully herein by reference as disclosed content of the present Application.

The present invention, however, is not limited to these previously described variants perform diffusers.

The above-described spotlight with Fresnel lens particularly preferably can be used as a lighting unit together with the power supply or ballast device is essentially smaller than in the prior art. For the same received light power, as in the prior art, such a power source can be made less the m electric, and from a mechanical point of view, because the spotlight with Fresnel lens, in accordance with the present invention, has a much higher efficiency lighting. Therefore, the installation is lighter and takes up less space during transportation and storage.

Because of this, in particular, when using a cold light reflectors, further reduced the overall exposure of the heat load on the illuminated people and objects.

Spotlight with Fresnel lens in accordance with the present invention preferably can also be used to improve the efficiency of light lighting fixtures.

1. Spotlight with Fresnel lens with adjustable angle of aperture of the output beam of light, preferably containing an elliptical reflector, a lamp and at least one Fresnel lens and Fresnel lens includes a diffuser, and the diffuser is made of circular shape and is located in the center of the Fresnel lens or diffuser is made with a varying degree of dispersion so that more strongly scattering region located in the middle of the cone, and to a lesser extent of the scattering region is located at its edge.

2. Spotlight with Fresnel lens according to claim 1, in which the Fresnel lens diffuser forms a light mixing system, which changes the proportion of scattered light in terms of percentage geome rejeski-optically projected light, and, thus, changes the ratio of mixing of light as a function of the installation spotlight with Fresnel lens.

3. Spotlight with Fresnel lens of claim 1, wherein the Fresnel lens has a valid point of focus, which may be imposed at the point of focus of the reflector remote from the reflector, in particular, when installing the spotlight with Fresnel lens in a mode of a light spot.

4. Spotlight with Fresnel lens according to claim 1, in which the Fresnel lens is designed as a Fresnel lens preferably as a PLANO-convex collecting lens.

5. Spotlight with Fresnel lens of claim 1, wherein the Fresnel lens includes a dual lens with corrected chromatic properties of the projection.

6. Spotlight with Fresnel lens of claim 1, wherein the reflector consists of a metal or preferably transparent dielectric material, glass and/or plastic.

7. Spotlight with Fresnel lens according to claim 1, in which at least one of the two main surfaces of the reflector contains a system of optically thin layers.

8. Spotlight with Fresnel lens according to claim 1, in which the light-reflecting surface of the reflector is made preferably structured with subsurface layers or faces so that it scatters light, and none of the surfaces, one or two surfaces of the Fresnel lens is made of structures the bathrooms so, they scatter light in addition to the cone.

9. Spotlight with Fresnel lens according to claim 1, in which the reflector, a Fresnel lens and/or diffuser are coated at least on one side.

10. Spotlight with Fresnel lens according to claim 9, in which the coating Fresnel lens provides a dielectric interference layers, which modifies the spectrum of light passing through it.

11. Spotlight with Fresnel lens according to claim 1, in which at least one of the two major surfaces of the reflector has a coating of metal, preferably aluminum.

12. Spotlight with Fresnel lens according to claim 1, in which the lamp is an incandescent lamp, in particular a halogen lamp, light emitting diode, a set of light-emitting diodes or gas discharge lamp.

13. Spotlight with Fresnel lens according to claim 1, in which the auxiliary reflector is located between the Fresnel lens and reflector.

14. Spotlight with Fresnel lens according to claim 1, in which the Fresnel lens is made preferably pre-stressed using a pre-heat voltage on its surface.

15. Lighting unit, contains the spotlight with Fresnel lens according to any one of claims 1 to 14 and the corresponding power supply or load device.

16. Application spotlight with Fresnel lens according to one of claims 1 to 14 as lighting devices is for medicine, architecture, cinema, theatre, studios and pictures.

17. Lighting device containing the spotlight with Fresnel lens according to any one of claims 1 to 14.



 

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40 cl, 30 dwg

FIELD: automotive industry.

SUBSTANCE: proposed blinding effect optical limiter contains light receiver unit and light source with reflector and lens. Light radiation of light source can be adjusted depending on light radiation of external source of blinding light, and it completely falls onto reflecting surface, and light radiation reflected from said surface in field of vision has reduced blinding action. Light receiver unit is component whose electric value changes depending on intensity of light radiation of external source of blinding effect. Lends is made elongated, and diffuser and/or reflector installed before lens is made asymmetrical.

EFFECT: reduced blinding of driver by light from external light radiation sources.

7 cl, 4 dwg

FIELD: light engineering.

SUBSTANCE: searchlight comprises Fresnel lens with controlled aperture of output beam, elliptical reflector, lamp, and at least one Fresnel lens. The distance between the Fresnel lens and reflector can be changed depending on the distance between the lamp and reflector according to the controlled angle of the aperture of the searchlight beam. The Fresnel lens has circular diffusion screen mounted at the center of the lens. The Fresnel lens and the screen define a system for shifting light, which allows the fraction of the diffused light to be changed, and the Fresnel lens has real point of focusing that can be set in coincidence with the focusing point of the reflector. The reflector focusing point is located far from the reflector. The Fresnel lens represents a flat-convex collecting lens and has double lens with chromatic-corrected projection properties. The coating of the Fresnel lens has a system of dielectric interference layer that changes the spectrum of the light passing through it. The auxiliary reflector is interposed between the Fresnel lens and reflector.

EFFECT: enhanced efficiency.

19 cl, 6 dwg

FIELD: electric engineering; mine lamps.

SUBSTANCE: invention relates to portable lamps with built-in storage batteries, particularly, to explosionproof head lamps for use in mines. Proposed lamp has storage battery, light, electronic device connected to light and charging contacts connected to storage battery. Electronic device has electronic switch and electronic switch control circuit. One of charging contacts is connected to output of electronic switch. Lamp is furnished with timer connected to control circuit, circuit to determine presence of charging voltage across electronic switch output and circuit to measure voltage drop across electronic switch in process of battery charging whose inputs are connected to output of electronic switch, and outputs, to input of control circuit.

EFFECT: provision of control of battery charging according to chosen algorithm, increased service life of storage batteries.

4 cl, 2 dwg

FIELD: outdoor lighting fixtures for functioning in the dark.

SUBSTANCE: proposed outdoor lighting fixture supplied with power from solar battery and wind-electric power unit has vertical post and overhanging support lever that mounts single module. The latter accommodates oscillatory wind-electric power unit installed between solar energy powered lamps incorporating photoelectric panels, storage batteries, control units, and light-emitting diode strips and electrically connected to lamp batteries.

EFFECT: ability of off-line operation and environment lighting at night.

1 cl, 1 dwg

FIELD: electrical engineering, particularly devices preventing sparking of machines or apparatus used in chemical, oil refinery, gas-processing, metal mining industries, of portable equipment provided with built-in storage batteries, for instance mine lamps.

SUBSTANCE: device comprises electronic key to be connected to electrical consumer, control switch to control electronic key, overcharge signaling sensor and commutation signaling sensor, which are made as transformers, "OR" circuit, trigger, voltage doubler, integrating circuit and voltage divider. The device additionally has controller and monostable multivibrator.

EFFECT: simplified structure along with increased sensitivity and extended functional capabilities.

3 cl, 1 dwg

FIELD: the invention refers to illuminating mine equipment for individual use.

SUBSTANCE: the mine lamp for individual use has in a quality of a source of light a matrix of light diodes installed in a headlight, a connecting cord and two blocks of accumulator batteries located in a helmet in a position counterbalancing the headlight. At that the mine lamp is provided with a mechanical current generator located on the rear exterior side of the helmet in its center with possibility of its removal and is connected with the light diode headlight with the aid of a spiral wire through a condenser-capacitor.

EFFECT: possibility of getting emergency lighting in a mechanical way in case of breaking or complete discharging of the main feeding elements (accumulator batteries).

1 dwg

FIELD: lighting equipment.

SUBSTANCE: device with control device has emission source, diffuser, electric outputs. Emission source has at least two light diodes of different colors with given space distributions of emission and localized in space as at least one group, board and control device, containing programmed channels for separate control over emission of light diodes of each color by feeding periodically repeating power pulses, lengths of which for light diodes of different color are independent from each other, while relations of lengths of period of power pulse, its increase front, decrease and pause are determined for light diodes of each color. Diffuser, inside which board with light diodes is positioned, is made at least partially enveloping the area of effect of emission of light diodes of emission source.

EFFECT: better aesthetic and emotional effect, close to optimal psycho-physiological effect of decorative multicolor lamp with vastly improved gamma of color effects, resulting in hypnotizing effect, increase of its attractiveness, efficiency, and broadening of its functional capabilities and addition of new consumer functions, lower costs and simplified usage.

20 cl, 15 dwg, 1 tbl

The invention relates to lighting mining equipment for individual use
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