Light emitting device

 

The invention relates to lighting devices of the projector type and can be used to create underwater lighting devices and appliances, projector type, including vehicle headlights. The technical result is an increase in the intensity of the light beam. The device contains a light source, a main reflector with a concave surface and a projection lens system, while the main reflector with a concave surface and a projection lens system are optically aligned relative to each other, and the light source is located between the reflector and the projection lens system and so on the same optical axis with them. In addition, between the light source and the main reflector it has the main prereflective collecting lens, while the concave surface of the main reflector is made in the form of a spherical segment, the light source is in focus with the main reflector and the main prereflective collecting lens has a focal distance greater than the focal length of the primary reflector 1.252.0 times its diameter equal to the diameter of the main reflector or exceeds it, and is this lens the La to the light source. 4 C.p. f-crystals, 2 Il.

The invention relates to lighting devices of the projector type and can be used to create underwater lighting devices and appliances, projector type, including vehicle headlights.

Known lighting device described in the application for the invention RF 98109712 "Headlight for hire", the priority of 19.05.1999,, publ. 27.02.2000, the Device comprises a reflector, refractor, and the light source. This reflector has a base surface of a spherical, parabolic, elliptical or hyperbolic type and is provided with a convex or concave base of the reflective elements, the working surface of which is made in the form of a surface of Bezier or has the form of a circle or ellipse in the vertical and horizontal sections. In addition, the reflective elements are provided with a concentrating reflector elements, the vertical size of which is chosen less than or equal to the vertical size of the base of the reflective elements and their horizontal size of the selected less than or equal to the horizontal size of the base of the reflective elements of This luminaire is not possible to obtain a high density of luminous flux in the beam, since it includes AMESim, than the diameter of the reflector.

Known as the lighting device described in the patent of the Russian Federation 2115060 "Headlight for vehicles, priority dated 16.12.1993,, publ. 10.07.1998, Headlight Faro is a projection type and contains a reflector, a light source, screen and lens. This reflector is a concave surface having the shape of a paraboloid; the light source is located inside the reflector, and the lens is located so that its optical axis coincides with the optical axis of the reflector, and its focus coincides with the focus of the reflector.

This light device also does not allow to concentrate the beam along its optical axis, because it does not provide for any devices that allows you to collect the light radiation into a beam with a diameter less than the diameter of the reflector.

The closest known is the device described in the patent of the Russian Federation 2149307 "lightsource", priority dated 11.12.1998,, publ. 20.05.2000, the Device contains a light source, an ellipsoidal reflector, a projection lens system aligned optically with an ellipsoidal reflector located between the ellipsoidal reflector and the projection system aperture-reflector. This mintova projection system are located relative to each other so to their foci coincide.

This device allows you to increase the intensity of light in the beam due to the fact that part of the radiation coming from the light source in the direction opposite to the reflector side, returns to the reflector aperture. However, to concentrate this light flux along the optical axis of the system, because any lens projection system can only colliergate falling on her light beam, but does not compress its axis.

The objective of this invention is to provide a lighting device that provides compression of the light beam along the optical axis and due to this significant increase in its intensity.

The problem is solved in that, as is known, the inventive lighting device includes a light source, a main reflector with a concave surface and a projection lens system, while the main reflector with a concave surface and a projection lens system are optically aligned relative to each other, and the light source is located between the reflector and the projection lens system and so on the same optical axis with them.

Unlike well-known in the inventive lighting device ri this concave surface of the main reflector is made in the form of a spherical segment, the light source is in focus with the main reflector and the main prereflective collecting lens has a focal distance greater than the focal length of the primary reflector 1.252.0 times its diameter equal to the diameter of the main reflector or exceeds it, and is this lens at this distance from the main reflector, which does not exceed half the distance from the main reflector to a light source.

In the inventive lighting device main prereflective collecting lens configured to move along its optical axis. This gives you the ability to produce accurate optical configuration of the entire device and to receive the most dense and narrow optical beam.

In the inventive lighting device in front of the lens projection system can be installed aperture, which will reduce the level of that part of the radiation that was not generated by the device in a narrow light beam.

In the inventive lighting device can be installed additional reflector with a concave surface and the other prereflective collecting lens; however, the size and shape specified additionally the second reflector is a through hole with a diameter of not less than half the diameter of a point source of light, but not exceeding the diameter of a point source of light is more than two times, and the axis of this through hole coincides with the optical axis of the additional reflector; the other prereflective collecting lens for all characteristics similar to the main prereflective collecting lens; said additional reflector with a concave surface and the other prereflective collecting lens arranged opposite the light source relative to the main reflector with a concave surface and the main lenticular lens side, symmetrically them and thus, to the optical axis of the additional reflector with a concave surface and the other prereflective collecting lens coincides with the optical axis of the main reflector with a concave surface.

In the inventive lighting device for additional reflector with a concave surface may be located at such a distance from the main reflector with a concave surface, which focuses both reflectors will coincide with each other.

At the present time is not known a lighting device, in which between the light source and reflector installed viruuma lens collects on the reflector coming from the source of light emission in small-diameter light spot. Built in spot light radiation is additionally focused by the reflector on the collecting lens in an even tighter spot light, in which light radiation has a fairly large divergence. However, the passing of the light through the set before reflector lens, light is collected in the focus of the lens. However, since passing through prereflective the lens, the light beam enters from the small diameter of the light spot, the focus of this prereflective lens radiation has a small divergence. Therefore, when getting this radiation on the lens projection system installed for the light source, this radiation is formed of the specified lens projection system in a narrow light beam with minimal divergence. This narrow light beam to the same formed of focused radiation reflector, so it has a high intensity, which exceeds the intensity of the received known devices radiation, at least two times, as shown by our measurements. Taking into account that the installation between the light source and reflector prereflective lenses will pederasty radiation generated by the inventive device, the beam is, at least two times higher than when receiving the light beam other lighting devices. This is because the effect of focusing the impact prereflective lens is higher than the effect of the reflection of radiation on the surface of the lens.

In Fig.1 shows a diagram of a lighting device with one reflector and one prereflective collecting lens.

In Fig.2 shows a diagram of a lighting device with two reflectors and two prereflective collecting lenses.

The inventive light fixture has a main reflector 1 with a concave reflecting surface, is made in the form of a sphere segment; a point light source 2, for example an electric arc lamp or candle; lens projection system 3; the main prereflective collecting lens 4, which in this example is biconvex and symmetric; and the aperture 5. The main reflector 1 and the projection lens system 3 is placed against each other and so that their optical axes coincide with each other, the distance between them exceeded the focal length of the reflector 1, at least 1.5 times. Between the main reflector 1 and the projection lens system 3 is set t is its location coincides with the focus of the main reflector 1. Between the point light source 2 and the main reflector 1 set main prereflective collecting lens 4, focal length which exceeds the focal length of the primary reflector 1.252.0 times. The main prereflective collecting lens 4 is installed so that its optical axis coincides with the optical axis of the main reflector 1 and set it at such a distance from the main reflector 1, which is 0.50,25 fokusnovo distance of the main reflector 1. Before the projection lens system 3 with the aperture 5, the hole diameter and the distance of the projection lens system 3 are chosen such as to reduce the level of light from the light source 2 that did not appear on the main reflector 1.

In this lighting device can be installed additional reflector 6 (see Fig.2). This additional reflector 6 has the same reflective surface as that of the main reflector 1, i.e., its surface has the shape of a spherical segment with a focal distance equal to the focal length of the main reflector 1. However, the additional reflector 6 is made a through hole 7, orogen thus, so that its optical axis coincides with the optical axis of the main reflector 1, and its focus coincides with the focus also of the main reflector 1. Between the light source 2 and the additional reflector 6 installed additional collecting lens 8, focal length which exceeds the focal length of the additional reflector 6 1.252.0 times. Additional collecting lens 8 is positioned in such a way that its optical axis coincides with the optical axis of the main reflector 1, and she was at such a distance from the additional reflector 6, which does not exceed half the distance from the secondary reflector 6 to the light source 2. Before a through hole 7 on the side opposite to that against which is located a light source 2, installed projection lens system 3. This projection lens system 3 is located so that its optical axis coincides with the optical axis of the main reflector 1.

If the device only main reflector it works as follows (see Fig.1.). Light emission from the light source 2 in a dispersed form is distributed in all directions. In this part of this scattered light slutet beam is transmitted into the space. Another part of this scattered light radiation, which goes in the opposite direction from the main projection lens system 3, goes first to the main prereflective collecting lens 4. This basic prereflective collecting lens 4, the dispersed light is focused on the reflective surface of the primary reflector 1 in the light spot, the diameter of which depends on the distance between the main prereflective collecting lens 4 reflecting surface of the main reflector 1. Light emission from the light reflected by the main reflector 1 and is formed in the form of a focused light beam with the focus being in the main body prereflective collecting lens 4, as the light source 2 is located at the focus of the main reflector 1 in terms of the design of this device. However, reflected from the main reflector 1, the light beam from the light falls again on the main prereflective collecting lens 4. This basic prereflective collecting lens 4 has a focal distance greater than the focal length of the main reflector 1 1.252.0 times, in terms of the design of the device. The poet is zo 4 in laboratoriais narrow light beam, which then gets on the projection lens system 3, where he advanced collyriums in narrow parallel light beam and is excreted in the space. In this case, as shown by the test results, the intensity of this light beam exceeds at least 2 times the intensity of the light beam received in the absence of the main prereflective collecting lens 4 when all other parameters of a lighting device. If this device will be installed aperture 5, it will cut off that part of the light radiation, which is not formed by the main reflector 1 of the main prereflective collecting lens 4 in a narrow light beam, and thus will increase the contrast emerging from the projection lens system 3 of the light beam.

If the light fixture additional reflector 6 with additional collecting lens 8 (see Fig. 2) he works as follows. Light emission from the light source 2 in a dispersed form is distributed in all directions. In this part of this light scattered radiation is transferred to the main reflector 1 with the main prereflective collecting lens 4 and is formed in laboratoriais narrow light beam, as Pocatello focus this lens 8 through the through hole 7 falls on the projection lens system 3, where it is formed into a parallel light beam and is displayed in the space. However, additional collecting lens 8 in this case works as part of the projection lens system 3, and thereafter, the light beam falls on this lens projection system 3 is formed in a narrow light beam with low divergence, therefore, in the projection lens system 3, it will be formed in a narrow parallel light beam of a higher quality than those in all other cases it is received. The other part of the light radiation coming from the light source 2 in the direction opposite from the main reflector 1, gets to an additional collecting lens 8 and after the secondary reflector 6. Additional collecting lens 8 focuses falling on her radiation and forms it into a light spot on the surface of the additional reflector 6. When this part of the radiation of the light spot passes through the through hole 7 and enters the projection lens system 3, but since the diameter of the through hole 7 is small, the luminous flux passing through it, has a low divergence, is formed in this projection lens system 3 in the beam is small, the R light beam, which was not hit in the through hole 7, an additional reflector 6 for additional collecting lens 8, where it is light again focuses and then goes to the main prereflective collecting lens 4. This basic prereflective collecting lens 4, the light beam is again focused and collected on the surface of the main reflector 1 in the light spot, the diameter of which does not exceed the diameter of the light spot formed of the same basic prereflective collecting lens 4 during the passage through it of the light radiation coming directly from the light source 2. Next, the process of forming the light beam when reflected light beam from the light is the same as described above. On the whole projection lens system 3 enters the light beam coming from the light source 2 directly to an additional collecting lens 8 coming from the light source 2 on the main reflector 1 with the main prereflective collecting lens 4, and coming from the light source 2 additional reflector 6 with additional collecting lens 8. With all these threads radiation formed into one stream with approximately oame 3, the output from this lens projection system 3 is formed by the light beam with the total intensity from all these light fluxes with very low divergence. As shown by the test results, the intensity of this light beam exceeds at least 34 times the intensity of a light beam produced in the known lighting devices with the same light characteristics light source.

Claims

1. Light emitting device containing a light source, a main reflector with a concave surface and a projection lens system, and the main reflector with a concave surface and a projection lens system are optically aligned relative to each other, and the light source is honey reflector and lens projection system and also on the same optical axis with them, characterized in that it is between the light source and the main reflector installed main prereflective collecting lens, while the concave surface of the main reflector is made in the form of a spherical segment, the light source is in focus with the main reflector, and ukazannogo reflector 1.252.0 times its diameter equal to the diameter of the main reflector or exceeds it, and is this lens at this distance from the main reflector, which does not exceed half the distance from the main reflector to a light source.

2. Lighting device according to p. 1, characterized in that in it the main prereflective collecting lens configured to move along its optical axis.

3. Lighting device according to p. 1, characterized in that it has an aperture that is located between the projection lens system and the light source and mounted coaxially with this lens projection system and the main reflector.

4. Lighting device according to p. 1, characterized in that it includes an additional reflector with a concave surface and the other prereflective collecting lens, the dimensions and the form of this additional reflector is similar to the main reflector with a concave surface, but in the wall of the specified additional reflector is a through hole with a diameter of not less than half the diameter of a point source of light, but not exceeding the diameter of a point source of light is more than two times, and the axis of this scvaa lens on all characteristics similar to the main prereflective collecting lens, these additional reflector with a concave surface and the other prereflective collecting lens are located on the opposite of the light source relative to the main reflector with a concave surface and the main lenticular lens side, symmetrically with them and so that the optical axis of the additional reflector with a concave surface and the other prereflective collecting lens coincides with the optical axis of the main reflector with a concave surface.

5. Lighting device according to p. 1, characterized in that the additional reflector with a concave surface is located at a distance from the main reflector with a concave surface, which focuses both reflectors will coincide with each other.

 

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