RU1415846C - Fog he adlight - Google Patents

Description

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ABOUT)

The invention relates to traffic lighting, and in particular to fog lamps designed to ensure the operation of vehicles in conditions of limited visibility.

The aim of the invention is to reduce the horizontal dimension of the headlamp,

Fig. 1 shows the path of the rays and the cross-section of the structure of the optical element of the headlight with a vertical projection plane} Fig. 2 shows the path of the beams and the cross-section of the structure of the optical element of the headlight with a horizontally projecting plane passing along the para-paracircular upper part of the reflector; Fig. 3 shows the path of the rays and the structural section of the optical element of the headlight by a horizontal projection plane passing along the paraboloidal lower part of the reflector; on Fig, 4 shows a front view of the optical element of the headlight,

The fog lamp contains an optical element representing interconnected reflector 1, a light source 2 with a filament body 3, a deflector 4, a diffuser 5,

The reflector 1 consists of two parts 6 and 7, one of which 6 has a parabolic profile 8 in the vertical plane and a profile 9 of the circle in the horizontal plane, t, e. made in the form of a parabolocircular surface truncated from above by a horizontal plane 10, The other part 7 of the reflector 1 is filled in the form of a paraboloid element truncated from below by a horizontal plane 11, and the height (H) of the paraboloid part is located in the lower part of the reflector 1 7, the reflector 1 does not exceed the distance from the plane 11 to the upper point of the counter-reflector 4, the focal points 12 of both parts 6 and 7 of the reflector 1 are aligned, An ellipsoid counter-reflector 4 is installed opposite the lower paraboloid part 7 of the reflector 1, the axis 13 of which is aligned with the horizontal line 14 of the focal plane of the reflector 1, perpendicular to the optical axis of the Headlamp, and the foci 15 and 16 are removed from the focal point 12 by an amount not exceeding the length of the filament body 3 of the light source 2 installed in the reflector 1 with an offset (L) so that the focal points 12 of the reflector 1

and one of the foci of 15 counterreflectors 4 were within the size of the filament body 3. The ratio of the focal length of the reflector 1 to the total length of the filament body 3 and its image 17 formed by the counterreflector 4 is in the range 2.66, .4 , O, t, e 2.66 f / 1 (4.0,

The diffuser 5 in this design of the fog lamp practically acts as a protective glass and has only a small c 18, equal in height to the paraboloid part 7 of the reflector and placed opposite it. Po equipped with a diffusing cylindrical lenses 19,

The fog lamp creates the required light distribution as follows.

The radiation from the filament body 3 of the light source 2 falls on the ellipsoid surface of the counter-reflector 4, reflected from which in accordance with the laws of geometric optics, forms an image 17 of the filament body 3 on the major axis 13 of the ellipsoid counter-reflector 4, since the position of the filament body 3 is Since the focal points 12 of the reflector 1 and one of the foci 15 or 16 of the reflector 4, for example, the focus 15, are within the dimensions of the glow body 3, the image 17 of the glow body 3 is practically a continuation of the glow body 3 itself and forms t, together with Hi-tM, a light body of the total length (1), symmetrical with respect to the optical axis of the headlamp. In this case, the radiation from the filament body 3 and its image 17 falls on the reflector 1, and since the reflector 1 in the upper part 6 has a parabolic profile 8 in the vertical plane (see, Fig. 1) and a circle profile in the horizontal plane (see, Fig. , 2), when the filament body 3 is located along the horizontal line 14, perpendicular to the optical axis of the headlamp and passing through the focus 12 of the reflector 1, part 6 of the latter forms a light distribution corresponding to that required for the fog lamp, i.e., the scattering angle of the light beam in upright plane is less than 3 °, and in the horizontal plane is 180 °, In this practical effect Český equality brighter areas parabopokrugovoy 1 part f reflector working in normalized horizontal directions, the character svetoraspredelr-audio such design lights very uniform.

However, it is impossible to make the entire reflector 1 parabolic circular since the reflector 4 shields a part of the radiation reflected by the similar surface of the reflector 1 located opposite the reflector 4. Therefore, part 7 of the reflector 1 (see, Fig. 3) is paraboloid. from the glowing body 3 and its image 17 falls in this region onto the paraboloidal surface 7 of the reflector 1 and since the position of the focal points 12 of parts 6 and 7 of the reflector 1 coincide, the beam reflected by part 7 will be concentrated enough and can in the case of the need to create greater luminous intensity in the central region of the light-dispersed (f) mirror 1 to the coaxial length (1) of the body of Jacal 3, and then the reference 17, formed by the counter-reflector 4, should be in the dipole 2.66 .. ..4.0, i.e. 2.66. f / 1: 4.0.

At values (f / 1) less than 2.66, there is a noticeable change in the orientation of the projections of elementary mappings in the peripheral zones of light distribution, which leads to unacceptable expansion of the light beam and a decrease in luminous intensities. At values greater than 4.0, there is a sharp decrease in luminous intensity in all areas of the light distribution, caused by a decrease in the values of the areas of the corresponding bright zones of the reflector.

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Claims (1)

20 Claims A fog lamp comprising a reflector with a parabolic profile, a diffuser, an anti-reflector for illumination. For the sake of excellence, the lighting is 25 lipsoid in shape and a light source with its characteristics, i.e. in order to achieve greater uniformity, installed on the large axis of the countercurrent, on the diffuser in the area working with this part of the reflector 1, scattering vertical cylindrical 3O axes of the headlight are distinguished, they are distinguished from the lens 19. The light reflected on them reflects that , with the enhancement circuit of light part 7, the radiation is scattered in the horizontal plane, adding a crook, both of which focus and pho. the cus of the reflector is located on one line perpendicular to the optical technical characteristics, the reflector is made in the form of a parabolic circular surface conjugated in the lower luminous intensity in the main directions of the light distribution pattern within +40. It has been experimentally established that the current regulatory requirement is met by a condition under which the ratio of the focal length nn (f) otrlkatpl 1 to the sokojunnuyu length (1) of the body of jacal 3 and then type 17, formed by the counter-deflector 4, should be in the dipole 2.66 .... 4.0, i.e. 2 , 66. f / 1: 4.0. At values (f / 1) less than 2.66, there is a noticeable change in the orientation of the projections of elementary mappings in the peripheral zones of light distribution, which leads to unacceptable expansion of the light beam and a decrease in luminous intensities. At values greater than 4.0, there is a sharp decrease in luminous intensity in all areas of the light distribution, caused by a decrease in the values of the areas of the corresponding bright zones of the reflector. Yu 20 Claims A fog lamp containing a reflector with a parabolic profile, a diffuser, an anti-reflective zlipsoid shape and a light source mounted on the major axis of the counter axis of the headlight are distinguished by the fact that, with a light-improving circuit a crook, both of which focus and pho. the cus of the reflector is located on one line perpendicular to the optical A fog lamp comprising a reflector with a parabolic profile, a diffuser, an anti-reflective zlipsoid shape and a light source mounted on the major axis of the counter-axis of the headlight is distinguished by the fact that, with a light-improving circuit technical characteristics, the reflector is made in the form of a parabolic circular surface conjugated in the lower parts with an element of a paraboloidal surface, while the focal points of the reflector and one of the foci of the reflector coincide with the incandescent body of the light source, and the height of the paraboloid part of the reflector is equal to the height of the reflector. fifteen. 72 figg fig.Z / y. r " Editor L. Volkova Order 1956 VINYL State Committee of the CCC 4/5, according to the made inventions and discoveries P3035, Moscow, Zh-35, Rauska nab., 4/5 F1L. Compiled by G. Velichkim Tehred L. Serdyukov; Corrector V. Girn to Circulation L Subscription