CN216252935U - Airborne camera structure capable of finely adjusting back focal length - Google Patents

Abstract

The utility model discloses an airborne camera structure capable of finely adjusting back focus, which is used outside an cabin in an aircraft cabin and used for shooting state information outside the cabin in the flight process. The onboard camera shooting structure is integrally sealed, so that water vapor is prevented from entering the cavity to damage the photoelectric device; filling nitrogen into the cavity to protect the optical device; the front end heats the glass to realize automatic demisting and deicing; the distance between the optical lens and the photosensitive device is locked through the positioning screw, so that the fine adjustment of the back focal length of the optical lens is realized. The utility model has compact structure, small volume, modularized installation, convenient assembly, disassembly and maintenance, has the functions of automatic demisting and deicing and fine adjustment of the back focal length of the lens, and meets the requirements of special airborne environment.

Description

Airborne camera structure capable of finely adjusting back focal length

Technical Field

The utility model belongs to the field of airborne equipment structures, and particularly relates to airborne camera equipment for shooting state information inside and outside a flight process cabin.

Background

With the continuous improvement of informatization and digitization capabilities of an airborne avionics system, airborne camera equipment is widely used outside an inner cabin of an airplane cabin. Such as monitoring and recording instrument data in the cabin, pilot operation, running states of equipment outside the cabin, flight scenes and the like.

Chinese patent 201711343800.3 "an onboard camera structure" discloses an onboard camera structure capable of meeting the requirement of adaptability to the use environment outside the cabin of an airplane, but the structure is complex, the optical space and the electric appliance space are mixed, and the maintenance and the dismounting are inconvenient. The precision of the optical imaging part depends on the processing precision of parts, the imaging focusing caused by errors is inaccurate, the back focal length of the lens cannot be finely adjusted, and the assembly and debugging are difficult.

SUMMERY OF THE UTILITY MODEL

In order to solve the technical problems mentioned in the background art, the utility model provides an airborne camera structure capable of finely adjusting back focus.

In order to achieve the technical purpose, the technical scheme of the utility model is as follows:

an airborne camera structure capable of finely adjusting back focus is characterized by comprising a lens sleeve, an optical lens, a threaded connection ring, a filter glass pressing ring, filter glass, an optical imaging surface, an image acquisition processing plate, a back cover sealing ring, a sealing type connector, a back cover, a structure base, a lens sleeve back sealing ring, a positioning screw, an insulating isolation sleeve, a lens sleeve front sealing ring and a heating demisting glass combination; the color filter glass is screwed into the central window of the structural base through the color filter glass pressing ring and is locked by a positioning screw; the image acquisition processing board comprises two connected printed circuit boards, a heightening column is arranged between the two printed circuit boards, and the heightening column is overlapped and assembled in a rear cavity of the structural base by screws; the optical imaging surface is parallel to the color filter glass, and the sealing connector is welded on the image acquisition processing board; the rear cover sealing ring is embedded into a rear cavity edge groove of the structural base, and the rear cover penetrates through the sealed connector to be fixedly connected with the structural base through a screw; the screw thread adapter ring is of a circular ring structure, threads are arranged on the inner ring and the outer ring, the threads of the inner ring are screwed with the optical lens in a spiral mode and fixed in a dispensing mode, the threads of the outer ring are screwed into the central window from the front end of the structure base, the heating defogging glass combination is installed in a front section limiting groove of the insulating isolation sleeve, the installed heating defogging glass combination and the insulating isolation sleeve are embedded in the outer layer of the optical lens in a sleeving mode for installation, and a welding heating wire lead is led out to the image acquisition processing board; the rear sealing ring of the lens sleeve is embedded into the structural base, and the front sealing ring of the lens sleeve is embedded between the lens sleeve and the heating demisting glass assembly.

Preferably, the threaded connecting ring is of a light metal structure and is provided with fine-thread external threads; the structure base adopts light metal construction, is provided with fine tooth internal thread for the screw thread adapter ring fine motion normal running fit on the structure base.

Preferably, the color filter glass and the structural base are installed and fixed to form a cavity, and the structural base divides the cavity into a cylindrical independent space and a cubic independent space which are arranged in front and back; the cylindrical independent space is an optical component space, and the cubic independent space is an imaging processing component space.

Preferably, the installation environment of the lens sleeve and the structural base is a glove box filled with nitrogen, so that a cavity formed after the lens sleeve and the structural base are installed is a sealed nitrogen environment.

Preferably, the sealed connector output is connected to a video display device.

Preferably, the insulating isolation sleeve is made of insulating plastic materials, and the front end of the insulating isolation sleeve is provided with a limiting groove; the heating defogging glass combination is arranged in a limiting groove at the front end of the insulating isolation sleeve, and the installed heating defogging glass combination and the insulating isolation sleeve are nested in the outer layer of the optical lens for installation.

Preferably, the image acquisition processing board is formed by connecting two printed circuit boards through a rigid flexible board.

Adopt the beneficial effect that above-mentioned technical scheme brought:

(1) through being the screwed connection circle of ring structure inner and outer lane all screwed, realize optics back focus fine setting, effectively avoid each parts processing on the optics route, installation error causes image blurring.

(2) The structure base ingeniously realizes two independent spaces of the optical component and the imaging processing component.

(3) The two independent spaces of the optical component and the imaging processing component of the airborne camera shooting structure are physically isolated through the color filter glass, and the damp-proof processing of the optical component and the electromagnetic compatibility processing of the imaging processing component can be respectively carried out.

(4) The heating defogging glass is installed in the front section limiting groove of the insulating isolation sleeve in a combined mode, the component is nested in the outer layer of the optical lens, and the safe and effective fixation of the heating defogging glass, the insulating glass and the heating defogging glass in the all-metal structure is achieved through materials and installation modes.

(5) In the glove box filled with nitrogen, the lens sleeve and the structural base are screwed down in the glove box, so that the cavity is ensured to be in a sealed nitrogen environment, and the purpose of protecting the optical component by filling nitrogen into the cavity of the optical component of the airborne camera structure is realized.

Drawings

FIG. 1 is a schematic view of an onboard camera structure with fine-adjustable back focus; the optical lens comprises a lens sleeve 1, an optical lens 2, a threaded adapter ring 3, a filter glass pressing ring 4, filter glass 5, an optical imaging surface 6, an image acquisition processing plate 7, a rear cover sealing ring 8, a sealing type connector 9, a rear cover 10, a structural base 11, a lens sleeve rear sealing ring 12, a positioning screw 13, an insulating isolation sleeve 14, a cavity 15, a lens sleeve front sealing ring 16 and a heating demisting glass combination 17.

Fig. 2 is a sectional view taken along the plane B-B of fig. 1.

Detailed Description

The technical scheme of the utility model is explained in detail in the following with the accompanying drawings.

With reference to fig. 1 and 2, the airborne camera structure capable of finely adjusting back focus according to the present invention includes a lens sleeve 1, an optical lens 2, a threaded coupling ring 3, a filter glass pressing ring 4, filter glass 5, an optical imaging surface 6, an image collecting and processing plate 7, a back cover sealing ring 8, a sealing type connector 9, a back cover 10, a structural base 11, a lens sleeve back sealing ring 12, a positioning screw 13, an insulating spacer sleeve 14, a cavity 15, a lens sleeve front sealing ring 16, and a heating defogging glass assembly 17.

The color filter glass pressing ring 4 is made of an aluminum alloy 6061 material, and an external thread is arranged on the outer side of the color filter glass pressing ring; the structural base 11 is made of aluminum alloy 6061, and internal threads are arranged in the central window. The color filter glass 5 is fixed by screwing the color filter glass pressing ring 4 into the central window of the structural base 11, and the cavity 15 is divided into a cylindrical independent space and a cubic independent space which are arranged in front and back. The cylindrical independent space is an optical component space, and the cubic independent space is an imaging processing component space.

The image acquisition processing board 7 is formed by connecting two printed circuit boards through a rigid-flexible board, wherein the former printed circuit board is used for acquiring image information, and the latter printed circuit board is used for processing the image information. Be provided with 4 screw holes in the cavity behind structure base 11, be provided with the bed hedgehopping post in the middle of two printed circuit board of image acquisition processing board 7, assemble in 11 back cavities of structure base with 4 screw superposes. The optical imaging surface 6 is parallel to the surface of the color filter glass 5, and the sealing type connector 9 is welded on the image acquisition processing plate 7.

The rear cover sealing ring 8 is an annular conductive rubber ring with high water vapor sealing performance and a solid circle cross section, and a circle of sealing groove is arranged on the rear end face of the structure base 11. The rear cover sealing ring 8 is embedded into a sealing groove on the rear end face of the structure base 11, and the rear cover 10 penetrates through the sealing type connector 9 to be fixedly connected with the structure base 11 through screws.

The threaded connection ring 3 is of a circular structure, threads are arranged on the inner ring and the outer ring, and the internal threads are screwed up with the optical lens 2 and fixed by dispensing; the external thread is set to be a fine thread with a tiny thread pitch, and the front end of the structure base 11 is screwed into the central window, so that the back focal length of the optical lens can be adjusted accurately and finely, and the distance from the back end surface of the optical lens 2 to the optical imaging surface 6 of the sensor is L.

And the 9 end of the sealed connector is connected with a power supply, is connected with a video display device and is used for observing images from the video display device.

The optical lens 2 is provided with two adjusting hand screws for adjusting the aperture size and the focal length size respectively. And positioning screw holes are formed in the upper side and the lower side of a central window in the front end of the structure base 11. The aperture of the optical lens 2 is adjusted to be maximum and locked, the focal length is adjusted to be minimum and locked, a test target is placed at the minimum object distance of the focal length, the optical lens 2 is slowly screwed into a central window at the front end of the structural base 11 and the clear condition of an output image is observed, the position of the optical lens 2 is locked by two positioning screws 13 when the image is clear, and finally the focal length of the optical lens 2 is adjusted to be infinite and locked.

The insulating isolation sleeve 14 is made of ABS plastic material, and the front end of the insulating isolation sleeve is provided with a limiting groove. The heating defogging glass combination 17 is made of glass materials with good heat conduction performance, and the heating defogging glass combination 17 is bonded in a limiting groove at the front end of the insulating isolation sleeve 14, so that the front surface of the heating defogging glass combination 17 is flush with the front surface of the insulating isolation sleeve 14. The member is fitted over the outer layer of the optical lens 2 and fixed with an adhesive. The heating demisting glass assembly 17 is provided with two electrode leads which are led out and welded to corresponding welding holes of the image acquisition processing plate 7.

The rear lens sleeve sealing ring 12 is an annular conductive rubber ring with high water vapor sealing performance and a solid circle cross section, a circle of sealing groove is formed in the side edge of the front end of the structure base 11, and the rear lens sleeve sealing ring 12 can be sleeved into the sealing groove of the structure base 11. The lens sleeve front sealing ring 16 is an annular conductive rubber ring with high water vapor sealing performance and a solid rectangular cross section, a circle of sealing groove is arranged on the inner side surface of the front end of the lens sleeve 1, and the lens sleeve front sealing ring 16 is placed in the sealing groove of the lens sleeve 1 and fixed by dispensing.

The completed part is placed into a glove box filled with nitrogen, the lens sleeve 1 and the structure base 11 are screwed tightly in the glove box, and the outer side structure gap is sealed with silica gel to ensure that the cavity 15 is in a sealed nitrogen environment.

The surface spraying of lens sleeve 1, back lid 10 and structure base 11 outside satisfies the paint that three proofings required, ensures the environment operation requirement of airborne camera.

The embodiments are only for illustrating the technical idea of the present invention, and the technical idea of the present invention is not limited thereto, and any modifications made on the basis of the technical scheme according to the technical idea of the present invention fall within the scope of the present invention.

Claims (7)

1. An airborne camera structure capable of finely adjusting back focus is characterized by comprising a lens sleeve, an optical lens, a threaded connection ring, a filter glass pressing ring, filter glass, an optical imaging surface, an image acquisition processing plate, a back cover sealing ring, a sealing type connector, a back cover, a structure base, a lens sleeve back sealing ring, a positioning screw, an insulating isolation sleeve, a lens sleeve front sealing ring and a heating demisting glass combination; the color filter glass is screwed into the central window of the structural base through the color filter glass pressing ring and is locked by a positioning screw; the image acquisition processing board comprises two connected printed circuit boards, a heightening column is arranged between the two printed circuit boards, and the heightening column is overlapped and assembled in a rear cavity of the structural base by screws; the optical imaging surface is parallel to the color filter glass, and the sealing connector is welded on the image acquisition processing board; the rear cover sealing ring is embedded into a rear cavity edge groove of the structural base, and the rear cover penetrates through the sealed connector to be fixedly connected with the structural base through a screw; the screw thread adapter ring is of a circular ring structure, threads are arranged on the inner ring and the outer ring, the threads of the inner ring are screwed with the optical lens in a spiral mode and fixed in a dispensing mode, the threads of the outer ring are screwed into the central window from the front end of the structure base, the heating defogging glass combination is installed in a front section limiting groove of the insulating isolation sleeve, the installed heating defogging glass combination and the insulating isolation sleeve are embedded in the outer layer of the optical lens in a sleeving mode for installation, and a welding heating wire lead is led out to the image acquisition processing board; the rear sealing ring of the lens sleeve is embedded into the structural base, and the front sealing ring of the lens sleeve is embedded between the lens sleeve and the heating demisting glass assembly.

2. The airborne camera structure capable of finely adjusting the back focus according to claim 1, wherein the threaded adapter ring is of a light metal structure and is provided with fine-thread external threads; the structure base adopts light metal construction, is provided with fine tooth internal thread for the screw thread adapter ring fine motion normal running fit on the structure base.

3. The airborne camera structure capable of finely adjusting the back focal length according to claim 1, wherein a cavity is formed after the color filter glass and the structural base are installed and fixed, and the structural base divides the cavity into a cylindrical independent space and a cubic independent space which are arranged in front and back; the cylindrical independent space is an optical component space, and the cubic independent space is an imaging processing component space.

4. The airborne camera structure capable of finely adjusting the back focus according to claim 3, wherein the installation environment of the lens sleeve and the structural base is a nitrogen-filled glove box, and the cavity formed after the lens sleeve and the structural base are installed is a sealed nitrogen environment.

5. The structure of claim 1, wherein the sealed connector is connected to a video display device at the output end.

6. The airborne camera structure capable of finely adjusting the back focus according to claim 1, wherein the insulating isolation sleeve is made of insulating plastic material, and the front end of the insulating isolation sleeve is provided with a limiting groove; the heating defogging glass combination is arranged in a limiting groove at the front end of the insulating isolation sleeve, and the installed heating defogging glass combination and the insulating isolation sleeve are nested in the outer layer of the optical lens for installation.

7. The structure of claim 1, wherein the image capturing and processing board is two printed circuit boards connected by a rigid flexible board.

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