CN213544919U - Temperature self-adaptive infrared optical vehicle-mounted lens - Google Patents

Abstract

The utility model discloses an infrared optics vehicle-mounted camera lens of temperature self-adaptation belongs to infrared camera lens technical field. The vehicle-mounted lens comprises a lens barrel and an outer shell, wherein a first lens, a second lens and a third lens are sequentially arranged in an inner cavity of the lens barrel from outside to inside, a first space ring is arranged between the first lens and the second lens, a second space ring is arranged between the second lens and the third lens, a plurality of heat dissipation holes are formed in the first space ring and the second space ring, heat dissipation columns are filled in the heat dissipation holes, an infrared lamp layer is arranged on an outer ring of the lens barrel, and a plurality of infrared lamps are uniformly arranged in the circumferential direction of the infrared lamp layer. The utility model fills the heat dissipation columns in the heat dissipation holes, thereby improving the overall heat dissipation effect of the lens; the outer ring of the lens is provided with the heat dissipation fins, so that the cooling effect of the infrared lamp is improved when the infrared lamp is used, the temperature is kept within a reasonable range, the final imaging quality of the lens is guaranteed by matching with the optical temperature self-adaptive technology of the lens, and the lens is simple in overall structure and high in imaging quality.

Description

Temperature self-adaptive infrared optical vehicle-mounted lens

Technical Field

The utility model belongs to the technical field of infrared camera lens, more specifically say, relate to an on-vehicle camera lens of infrared optics of temperature self-adaptation.

Background

Infrared camera lens have that the interference killing feature is good, and the night working distance is far away, pierces through advantages such as smoke and dust, haze ability reinforce, can improve driving safety with its use in the automobile driving field, even the sight receives the environmental obstruction, if meet the road dark, have smog etc. through thermal imaging, night vision system still can detect the place ahead pedestrian in the car assistance, presents clear place ahead road conditions for the driver. The optimal night vision performance is realized, the accident occurrence risk is reduced to the minimum, the accuracy of thermal imaging and the long-distance target detection capability are very critical, so that sufficient reaction time can be provided for a driver, but because the refractive index temperature coefficient of a material used by an infrared lens is large, the material is influenced by the ambient temperature and the temperature rise of the material, the optical material and the mechanical material expand with heat and contract with cold, the refractive index of the optical material can change along with the change of the temperature, the optimal image plane of the whole optical system deviates, the final imaging quality is reduced, the image is blurred due to the reaction on the image, the contrast is reduced, and the imaging performance of the lens is reduced;

the existing technology for improving the imaging quality usually uses an optical temperature self-adaptive technology, adopts a special optical material and a special optical element processing technology, utilizes the difference between the thermal characteristics of the optical material, reasonably combines different characteristic materials and optical elements to realize a temperature self-adaptive function, so that the imaging quality of a lens in a certain temperature range (for example, 20 ℃ below zero to 60 ℃ below zero) is not influenced, but the effect is not good when the temperature is higher;

the vehicle-mounted lens usually adopts an active infrared shooting technology, the active infrared technology is to artificially generate infrared radiation by using a specially-made infrared lamp to generate infrared light invisible to human eyes and captured by a common camera, the infrared light is used for radiating 'lighting' scenery and environment, the lens senses the reflected infrared light, imaging is clearer, but the heat productivity is larger when the infrared lamp is used for a long time, and the temperature is higher than 60 ℃ at times, so that the influence on the whole imaging quality of the lens is larger, and the heat dissipation effect of the vehicle-mounted lens has larger influence on the final imaging quality of the lens.

Disclosure of Invention

The technical problem is as follows: to the above-mentioned problem that exists among the prior art, the utility model aims to solve the technical problem that a temperature self-adaptation infrared optics vehicle-mounted lens solves vehicle-mounted lens and is influenced and self temperature rise by ambient temperature change and cause the problem that imaging quality descends.

The technical scheme is as follows: in order to solve the above problems, the utility model adopts the following technical proposal.

The utility model provides an on-vehicle camera lens of infrared optics of temperature self-adaptation, including lens cone and shell body, the inner chamber of lens cone has set gradually first lens by outer to interior, second lens and third lens, be equipped with first space ring between first lens and the second lens, be equipped with the second space ring between second lens and the third lens, be equipped with a plurality of louvres on first space ring and the second space ring, the inside packing of louvre has the heat dissipation post, the lens cone outer lane is equipped with infrared lamp layer, infrared lamp layer circumference evenly is provided with a plurality of infrared lamps.

Furthermore, the heat dissipation column is made of metal materials or rubber materials.

Furthermore, a plurality of radiating fins are arranged on the outer circle of the infrared lamp layer.

Furthermore, the upper parts of the first lens, the second lens and the third lens are connected with temperature sensors, and the temperature sensors are electrically connected with a heat dissipation circuit board arranged in the outer shell.

Furthermore, the outer wall of the outer shell is connected with more than one heat radiation fan, and the heat radiation fan is electrically connected with the heat radiation circuit board.

Further, the first lens and the third lens are positive lenses, and the second lens is a negative lens.

Furthermore, the lens cone is made of metal materials.

Has the advantages that: compared with the prior art, the heat dissipation holes are formed in the space ring, and the heat dissipation columns are filled in the heat dissipation holes, so that the overall heat dissipation effect of the lens is improved; the outer ring of the lens is provided with the heat dissipation fins, the temperature sensor is arranged in the lens barrel to send temperature signals to the circuit board to control the work of the heat dissipation fan outside the shell, the cooling effect of the infrared lamp is improved when the infrared lamp is used, the temperature is kept within a reasonable range, the final imaging quality of the lens is guaranteed by matching with the optical temperature self-adaption technology of the lens, and the lens is simple in overall structure and high in imaging quality.

Drawings

FIG. 1 is a schematic view of the overall structure of the present invention;

FIG. 2 is a schematic side view of the present invention;

fig. 3 is a schematic structural view of the first space ring of the present invention.

Detailed Description

The invention will be further elucidated with reference to the drawing.

As shown in fig. 1, a temperature adaptive infrared optical vehicle-mounted lens includes a lens barrel 4 and an outer shell 9, a first lens 1, a second lens 2 and a third lens 3 are sequentially arranged in an inner cavity of the lens barrel 4 from outside to inside, the first lens 1, the third lens 3 are positive lenses, the second lens 2 is a negative lens, a symmetrical optical structure of "positive, negative and positive" is the simplest structure capable of correcting all primary phase differences, and the purpose of eliminating thermal differences is achieved by an existing athermalization optical design method with different materials of complementary thermal properties, so that the lens has a function of self-adapting temperature and keeps good imaging quality, for example, the existing athermalization lens adopts Ge20Sb15Se65 as a material for the first lens 1 to have negative thermal differences, adopts optical germanium single crystals as a material for the second lens 2 to have positive thermal differences, and adopts optical germanium single crystals as a material for the third lens 3, the lens has negative thermal difference, the thermal difference values of all the lenses are mutually compensated, the displacement of an image plane is controlled in a tiny magnitude in a temperature range from-20 degrees to +60 degrees, and the imaging quality of the lens is not influenced by the temperature change in the range;

as shown in fig. 1 and 2, a first space ring 5 is disposed between the first lens 1 and the second lens 2, a second space ring 6 is disposed between the second lens 2 and the third lens 3, a plurality of heat dissipation holes 7 are disposed on the first space ring 5 and the second space ring 6, heat dissipation columns are filled inside the heat dissipation holes 7, the heat dissipation columns are made of metal or rubber (such as aluminum heat dissipation columns or silica gel heat dissipation columns) and used for conducting heat dissipation inside the lens barrel 4, the lens barrel 4 can also be made of metal, the heat dissipation columns are in contact with the body of the lens barrel 4, and the overall heat dissipation effect of the lens is improved.

As shown in fig. 1 and 2, an annular infrared lamp layer is arranged on the outer ring of the lens barrel 4, 8 infrared lamps 11 (the number of which can be adjusted according to the use environment) are uniformly arranged on the periphery of the infrared lamp layer, and the infrared lamps 11 are used as active light sources when the vehicle-mounted lens is used, so that the imaging quality of the vehicle-mounted lens is improved; after the infrared lamp is used for a long time, the temperature can reach more than 60 ℃, a plurality of radiating fins 41 are arranged on the outer circle of the infrared lamp layer and surround the infrared lamp layer in a circular shape, and the heat generated by the infrared lamp 11 can be quickly dissipated in a heat conduction mode;

as shown in fig. 3, the first space ring 5 is circular ring-shaped, 6 heat dissipation holes 7 are formed and uniformly distributed along the circumferential direction of the first space ring 5 (the number of the heat dissipation holes can be reasonably adjusted), the distribution positions of the heat dissipation holes 7 can be distributed in the same cross section as shown in fig. 3, and also can be distributed on different cross sections on the first space ring 5 in a staggered manner, so that the heat dissipation effects at different positions are enhanced, the distribution of the heat dissipation holes 7 of the second space ring 6 can be arranged in one or more planes as the heat dissipation holes of the first space ring 5, and the heat dissipation holes are uniformly and annularly arranged or are arranged on the second space ring 6 in a staggered manner.

As shown in fig. 1 and 2, in order to improve the overall heat dissipation effect of the lens, a temperature sensor 81 is connected to the upper portions of the first lens 1, the second lens 2 and the third lens 3, the temperature sensor 81 is electrically connected to a heat dissipation circuit board 82 disposed in the outer housing 9, 4 heat dissipation fans 83 are connected to the outer wall of the outer housing 9, the heat dissipation fans 83 are electrically connected to the heat dissipation circuit board 82, when the temperature sensor 81 detects that the temperature in the lens barrel 4 is too high, the heat dissipation circuit board 82 sends an electric signal to control the start of the heat dissipation fans 83, so as to enhance the air flow, and quickly dissipate heat of the heat dissipation fins 41, and reduce the overall temperature of the lens to reduce the temperature in the lens barrel 4 to a proper range, so that the optical temperature adaptive technology functions.

The foregoing is only a preferred embodiment of the present invention, and it should be noted that, for those skilled in the art, a plurality of modifications and decorations can be made without departing from the principle of the present invention, and these modifications and decorations should also be regarded as the protection scope of the present invention.

Claims (7)

1. The utility model provides an on-vehicle camera lens of infrared optics of temperature self-adaptation, its characterized in that, includes lens cone (4) and shell body (9), the inner chamber of lens cone (4) has set gradually first lens (1), second lens (2) and third lens (3) by outer to interior, be equipped with first space ring (5) between first lens (1) and second lens (2), be equipped with second space ring (6) between second lens (2) and third lens (3), be equipped with a plurality of louvres (7) on first space ring (5) and second space ring (6), the inside packing of louvre (7) has the heat dissipation post, lens cone (4) outer lane is equipped with infrared lamp layer, infrared lamp layer circumference evenly is provided with a plurality of infrared lamps (11).

2. The temperature-adaptive infrared optical vehicle-mounted lens according to claim 1, wherein the heat dissipation column is made of a metal material or a rubber material.

3. The temperature-adaptive infrared optical vehicle-mounted lens according to claim 1, characterized in that a plurality of heat dissipation fins (41) are arranged on the outer periphery of the infrared lamp layer.

4. The temperature-adaptive infrared optical vehicle-mounted lens according to claim 1, characterized in that a temperature sensor (81) is connected to the upper parts of the first lens (1), the second lens (2) and the third lens (3), and the temperature sensor (81) is electrically connected with a heat dissipation circuit board (82) arranged in the outer shell (9).

5. The temperature-adaptive infrared optical vehicle-mounted lens according to claim 4, wherein more than one heat dissipation fan (83) is connected to the outer wall of the outer shell (9), and the heat dissipation fan (83) is electrically connected with the heat dissipation circuit board (82).

6. The temperature-adaptive infrared optical vehicle-mounted lens according to claim 1, characterized in that the first lens (1) and the third lens (3) are positive lenses, and the second lens (2) is a negative lens.

7. The temperature-adaptive infrared optical vehicle-mounted lens according to claim 1, wherein the lens barrel (4) is made of metal.

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