The light fixture

 

(57) Abstract:

The invention relates to lighting technology, in particular to the lighting devices of the projector type. It can be used in the development of underwater lights, and automobile headlights and spotlights other vehicles. The technical result consists in expanding the functionality of the device. This is achieved in that the device comprises 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 projection system is made in the form of a set of lenses, each of which is equipped with a turning device capable of displacing it from the optical axis of the ellipsoidal reflector, and a front projection system flat mirror mounted at a 45 angle to the optical axis of the ellipsoidal reflector. Flat mirror is equipped with an adjustable device that allows you to deploy it around the optical axis of the ellipsoidal reflector in conjunction with any combination of lenses of the projection system installed in the course of the rays of the device. 5 C.p. f-crystals, 3 ill.

The invention and development of underwater lighting fixtures, as well as the headlights and spotlights other means of transportation.

The total requirement for any light fixture, the maximum coefficient of performance (COP) equal to the ratio of the luminous flux generated in the light beam to full light output of the radiation source. In some cases, the use efficiency of the light unit is largely determined by its ability to quickly change the angle of the formation of a light beam (scattering angle), the direction of the axis of the light beam, as well as sharp black and white border of a given configuration on the illuminated surface. To improve the reliability and extend the service responsible lighting devices requires backup light source.

Known light fixture firm Dedolight with variable angle forming light beam (scattering angle), contains one set of spherical reflector, the light source (filament halogen lamp) and two optical system. Forming a light beam, this device is by using two optical systems and reflector, the center of curvature of the reflective surface which is a filament lamp. Sudol the optical axis of the reflector, the lamp and the internal lenses.

Technical characteristics of the device DL-100, it follows that its efficiency is reduced by 6 times when the angle of scattering from the 40oto 4othat is due to a reduction of the useful solid angle of the emitter with decreasing scattering angle. This disadvantage is compounded by the fact that the transition to a more narrow light beam is usually caused by deficiency of light on the illuminated surface especially when observing distant objects through the scattering medium (water, fog and so on).

The scope of application of the device DL-100 is limited by the fact that for changing the direction of the light beam it is necessary to rotate the entire light fixture with power cables.

In addition, the design of the device allows you to get a sharp line formed by the light beam required to reduce the interference of the backscattered when observing through the scattering medium or the creation of headlights for iris upper part of the light beam, able to blind the driver of an oncoming car. This disadvantage is particularly evident at small scattering angles and due to the fact that the device is no limit of the light beam aperture located in the area Ivamova device associated with the he has no back light source, operatively enabled when the main one fails.

Famous underwater lighting fixture Deep-SeaLite American company Deep Sea Power & Light design that provides three scattering angle formed by the light beam - 80o, 60oor 30o- depending on the reflector device. However, the design of the device is practically not possible to change its angle scattering due to the complexity of replacing reflector.

Obviously, the last three of the lack of previous similar to the same extent and characteristic of the device Deep-SeaLite.

Known headlight for a vehicle (Patent FR N 2695710) containing a light source, a movable reflector and a corrective device to the motor to control this reflector. This device changes the direction of the light beam, in particular at the place, depending on changes in the vehicle proposed to carry out the corresponding inclination of the reflector. This solution can be used in the case of small angles of changing the direction of the light beam, limited by vignetting inclined beam protective glass, and the two last disadvantage of the first analogue.

The closest technical solution, selected as a prototype, is the headlight (RF Patent N 2052707) containing ellipsoidal reflector, a light source mounted in the middle focus of the ellipsoidal reflector, lens projection system, coaxially with the ellipsoidal reflector and the aperture-reflector located between the ellipsoidal reflector and the projection system. The diaphragm-reflector made from a mirrored reflecting surface having a shape of a body of rotation and facing the concave side to the light source, and the output window aperture is used to retrieve a black and white border of a certain form.

The described prototype is not possible during operation to quickly change the scattering angle and direction of the generated light beam, which reduces its functionality

The objective of the proposed solutions is to expand the functional capabilities of the device.

This is achieved by a lighting fixture containing ellipsoidal reflector, a light source mounted in the middle focus of the ellipsoidal reflector, lens projection system, aligned optically with an ellipsoidal reflector and located at the far focus is again which is facing the concave side to the light source, characterized in that the projection system is made in the form of a set of lenses, each of which is equipped with a turning device capable of displacing it from the optical axis of the ellipsoidal reflector, front projection system flat mirror mounted at 45oto the optical axis of the ellipsoidal reflector for her break, with flat mirror features a swivel device having a common axis of rotation with said rotary devices and allows you to deploy it around the optical axis of the ellipsoidal reflector to its fracture together with any combination of lenses of the projection system installed in the course of the rays of the device. The claimed combination of elements and relationships enables us to achieve this goal by installing a front projection system of an inclined mirror, providing a break to the optical axis 90o, performing a projection system in the form of a set of lenses, each of which has an option to turn together with the aforementioned inclined mirror around the optical axis of the elliptic reflector to change the direction of the light beam and offline be displaced from the optical axis of the instrument and does not participate in the formation of a light beam through the tee technics set of features, distinguish the claimed object was not identified. This solution differs from the known.

As stated, the solution can be implemented on modern materials and elements, it is industrially applicable.

In Fig. 1-3 shows the options the relative position of the components of the device, explaining the essence of the device. In Fig. 1 and 2 shows the optical scheme of the proposed lighting device with different combinations of lenses of the projection system installed in the path of beams and respectively providing minimum 2minor average 21the scattering angle. In Fig. 3 shows a variant of the optical circuit device with a backup light source and the scattering angle 22. In the drawings, denoted by:

1 - light source;

2 - the ellipsoidal reflector;

3 - aperture-deflector;

4 - flat mirror:

5 the first lens;

6 the second lens;

7 - protective glass.

The proposed device (Fig. 1) includes a light source 1, located near the focus F2ellipsoidal reflector 2, the aperture of the reflector 3, the flat mirror 4, a projection system, comprising, for example, of two lenses 5, 6, and protective glass 7. Projection system at elipsoidal reflector 2 and the flat mirror 4, installed in front of the projection system. Flat mirror provides a break in the optical axis ellipsoidal reflector 90o. Each of the lenses of the projection system is equipped with a turning device (not shown) capable of displacing it from the optical axis of the ellipsoidal reflector 2 which is located after the point of its fracture. Under the break point mentioned axis will understand the point of intersection of the optical axis of the ellipsoidal reflector with its sequel, as reflected by the flat mirror 4. Flat mirror is equipped with a turning device (not shown) allowing it to rotate around the optical axis of the ellipsoidal reflector in conjunction with a lens projection system installed in the course of the rays.

The device operates as follows. Discrete change of the scattering angle of the light beam generated by the proposed device, by varying the optical power of the projection system due to the conclusion of the rays of devices of different combinations of lenses constituting this projection system. Two projection system allows you to get four of the scattering angle of the light beam. The optical scheme shown in Fig. 1 to 3, illustrating the being of light beam: 2min(Fig. 1), 21(Fig. 2), 22(Fig. 3). As follows from the figures, 2min< 22< 21. It is obvious that to obtain the maximum angle 2maxout of the rays of the device must be removed both lenses 5 and 6.

Conclusion lenses 5 and 6, the projection system of the rays is rotated around the optical axis of the ellipsoidal reflector 2 which is located to the point of it breaking.

Changing the direction of the generated light beam at an angle of 2max is maintained by joint rotation of the mirror 4 and the projection lens system installed in the course of the rays of the device, around the optical axis of the elliptic reflector 2 which is located to the point of its fracture. On sections a-a, shown in Fig. 1-3 dash-dotted line shows the end position jointly rotatable mirror 4 and the projection lens system corresponding to the maximum angle change of direction of the light beam 2max. To rotate the projection lens system in conjunction with a flat mirror 4 can be used the same rotary device, which serves for the withdrawal of these lenses out of the rays.

We offer you the option of changing the angle of scattering allows to achieve an optimal layout and miniahmata, represents the body rotation, the normal to which intersect the optical axis of the ellipsoidal reflector in the light source, and free open (inside edge of the reflecting surfaces) light shield extending beyond the generated light beam. This design of the aperture of the reflector 3 allows you to make space for installation of the lenses 5 and 6, the projection system, the output of the of the rays. In addition, it allows a significant portion of the light flux, nepobedimogo directly on the ellipsoidal reflector 2, to send through the area of the light source on the ellipsoidal reflector 2 to maximize the efficiency of the device.

The number of zones (reflecting surfaces) aperture of the reflector 3, their shape and location are calculated, taking into account characteristics of the light source to achieve the specified uneven lighting and black and white border on the surface of the observed object.

The proposed device in a version with a backup light source (Fig. 3) further comprises a second light source 1, the second ellipsoidal reflector 2, the second aperture of the reflector 3 mounted along the optical axis of the first ellipsoidal reflectors for safe d the VA versions additional independent rotation of the mirror 4, designed for optical coupling to the optical axis of the second ellipsoidal reflector with the optical axis of the projection lens system installed in the course of the rays of the device. In the first embodiment, the rotary device is a flat mirror 4 provides a 180o(without lens projection system) around the optical axis of the ellipsoidal reflector to its fracture and displacement of the mirror mentioned along the optical axis ellipsoidal reflector on the value corresponding to the optical coupling of the optical axes of the second ellipsoidal reflector and lens projection system installed in the course of the rays of the device. Otherwise, the operation principle of the backup and the primary light sources is similar.

In the second variant, an additional rotation of the mirror 4 at an angle of 180ois turning the device around an optical axis of the ellipsoidal reflector after the point of her breaking (in its original position). In this case, the pair of optical axes of the lenses of the projection system installed in the course of the rays of the device, and enter in the course of the rays of the ellipsoidal reflector is not disturbed.

Protective glass 7, are spherical with the center of curvature PowerCore. Reducing the size of the device is especially significant for underwater versions as spherical protective glass 7 has a smaller length, the diameter and thickness than the flat, to withstand the specified pressure.

Implemented and tested the proposed layout of the device, confirming the effectiveness of the changes of the scattering angle.

1. The light fixture containing ellipsoidal reflector, a light source mounted in the middle focus of the ellipsoidal reflector, lens projection system, aligned optically with an ellipsoidal reflector and located at the far focus, located between the ellipsoidal reflector and the projection system aperture-reflector, a reflecting surface facing the concave side to the light source, characterized in that the projection system is made in the form of a set of lenses, each of which is equipped with a turning device capable of displacing it from the optical axis of the ellipsoidal reflector, front projection system is installed flat mirror located at 45oto the optical axis of the ellipsoidal reflector, the mirror features a swivel device that allows you to deploy it around the optical sight device.

2. The light fixture under item 1, characterized in that the aperture of the reflector is made in the form of a number of mirror-reflecting surfaces, which are the body of rotation, the normal to which intersect the optical axis of the ellipsoidal reflector in the light source.

3. The light fixture under item 1, characterized in that it further includes the second ellipsoidal reflector, a second light source, the second aperture of the reflector along the optical axis of the first ellipsoidal reflector similar to the main channel, and a rotary device of a flat mirror allows it to swivel 180o.

4. The light fixture on p. 3, characterized in that the rotary device is a flat mirror provides its 180oaround the optical axis of the ellipsoidal reflector to its fracture and displacement along said axis.

5. The light fixture on p. 3, characterized in that the rotary device is a flat mirror provides its 180oaround the optical axis of the ellipsoidal reflector after the point of its fracture.

6. The light fixture under item 1, characterized in that the projection system is installed protective glass SF is

 

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