CN114690361A - Medium wave capturing and tracking system - Google Patents
Medium wave capturing and tracking system Download PDFInfo
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- CN114690361A CN114690361A CN202111654699.XA CN202111654699A CN114690361A CN 114690361 A CN114690361 A CN 114690361A CN 202111654699 A CN202111654699 A CN 202111654699A CN 114690361 A CN114690361 A CN 114690361A
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- G—PHYSICS
- G02—OPTICS
- G02B—OPTICAL ELEMENTS, SYSTEMS OR APPARATUS
- G02B7/00—Mountings, adjusting means, or light-tight connections, for optical elements
- G02B7/02—Mountings, adjusting means, or light-tight connections, for optical elements for lenses
- G02B7/028—Mountings, adjusting means, or light-tight connections, for optical elements for lenses with means for compensating for changes in temperature or for controlling the temperature; thermal stabilisation
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- G—PHYSICS
- G02—OPTICS
- G02B—OPTICAL ELEMENTS, SYSTEMS OR APPARATUS
- G02B23/00—Telescopes, e.g. binoculars; Periscopes; Instruments for viewing the inside of hollow bodies; Viewfinders; Optical aiming or sighting devices
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- G—PHYSICS
- G02—OPTICS
- G02B—OPTICAL ELEMENTS, SYSTEMS OR APPARATUS
- G02B7/00—Mountings, adjusting means, or light-tight connections, for optical elements
- G02B7/008—Mountings, adjusting means, or light-tight connections, for optical elements with means for compensating for changes in temperature or for controlling the temperature; thermal stabilisation
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- General Physics & Mathematics (AREA)
- Optics & Photonics (AREA)
- Astronomy & Astrophysics (AREA)
- Lenses (AREA)
- Photometry And Measurement Of Optical Pulse Characteristics (AREA)
- Radiation Pyrometers (AREA)
Abstract
The invention relates to a medium wave capturing and tracking system, which is characterized in that: the system is sequentially provided with an optical cabin, a mechanical cabin and an electronic cabin from left to right along the light incidence direction, a transition plate is arranged below the mechanical cabin, the optical cabin is formed by an integral sealed lens barrel, and a main lens group optical system of the lens barrel is sequentially formed by a positive meniscus lens A, a negative meniscus lens B, a negative meniscus lens C, a positive meniscus lens D, a biconcave negative lens E and a biconvex positive lens F from an object plane to an image plane; a detector adjusting assembly is arranged in the mechanical cabin, a driver and a circuit board of the system are installed in the electronic cabin, and the detector adjusting assembly comprises an infrared detector capable of moving along the direction of an optical axis; the phase difference caused by high and low temperature is compensated by adjusting the position of the target surface of the detector, the whole lens machine is connected with the four-way table through the transition mechanism, and the transition mechanism has a two-dimensional inclination adjusting function so as to realize the coaxial parallel installation and adjustment of the optical machine and the main optical system through actual installation and adjustment.
Description
The technical field is as follows:
the invention relates to an infrared capturing system for medium waves, and belongs to the technical field of photoelectricity.
Background art:
the traditional fixed focus lens mainly adjusts the focal length by adjusting the interval of lenses and is used for compensating the change of high and low temperature phase surfaces, and if the mode is applied to a place with a slightly severe environment, the internal corrosion of the lens can be caused; and if a sealing measure is adopted, the wiring of the electronic components is considered, the size of the whole machine is inevitably increased, and the interchangeability is not facilitated.
The invention content is as follows:
the invention aims to provide a medium wave capturing and tracking system used in severe marine environment, which realizes focusing by adjusting the position of a detector, separates optics from machinery, ensures the sealing property of an optical cabin and the interchangeability and adjustment property of the mechanical cabin, and has the advantages of high reliability, compact structure and low cost.
In order to solve the technical problems, the invention adopts the following technical scheme:
the invention relates to a wave capturing and tracking system, which is characterized in that: the system is sequentially provided with an optical cabin, a mechanical cabin and an electronic cabin from left to right along the light incidence direction, a transition plate is arranged below the mechanical cabin, the optical cabin is formed by an integral sealed lens barrel, and a main lens group optical system of the lens barrel is sequentially formed by a meniscus positive lens A, a meniscus negative lens B, a meniscus negative lens C, a meniscus positive lens D, a biconcave negative lens E and a biconvex positive lens F from an object plane to an image plane; the detector adjusting assembly is arranged in the mechanical cabin, a driver and a circuit board of the system are installed in the electronic cabin, the detector adjusting assembly comprises an infrared detector which can move along the direction of an optical axis, and the infrared detector is arranged on the infrared detector as an imaging surface of an optical system, namely a detector target surface.
Further, the specific parameters of the light system are as follows:
(1) focal length: 400 mm;
(2) f number: 2.0;
(3) a detector: refrigerating 640x512, 15 um;
(4) working spectral range: 3.7-4.8 um.
Further, the optical parameter table of the primary lens group is as follows:
data relating to aspherical surface
The aspheric expression is:
z represents a position in the optical axis direction, r represents a height in the vertical direction with respect to the optical axis, c represents a radius of curvature, k represents a conic coefficient,
、
、
、
.., represents aspheric coefficients. In aspherical data, E-n represents "
", for example 3.0451E-005 stands for
。
Furthermore, a front protection sheet and a rear protection sheet which are respectively positioned in front of and behind the main lens group are also arranged in the lens cone; the attenuation sheet switching group comprises a motor frame, an attenuation sheet driving motor fixed on the motor frame, a gear fixed on an output shaft of the attenuation sheet driving motor, and an attenuation sheet rotary table with a handle and in meshing transmission with the gear, wherein the attenuation sheet rotary table with the handle is provided with two rotating stations coaxial with the main mirror group, the two rotating stations are respectively provided with different attenuation sheets, when the attenuation sheets need to be switched, the attenuation sheet driving motor rotates, the attenuation sheet rotary table is driven to rotate through gear meshing to realize the switching work of the attenuation sheets, when the rotary table moves to a required stroke, a separation blade on the rotary table enables the potential of a photoelectric switch to change, the control panel controls the attenuation sheet driving motor to power off, and the attenuation sheet driving motor stops rotating.
Further, still be equipped with the guide rail in above-mentioned machinery compartment, install the detector mounting panel on the guide rail, infrared detector installs on the detector mounting panel, is equipped with the linear stepping motor that the drive detector mounting panel removed along the optical axis direction in machinery compartment, and when temperature variation, linear stepping motor drives infrared detector optical axis back-and-forth movement, through adjustment detector target surface position to the change of the focus that the adaptation temperature leads to.
Furthermore, skin cover plates are arranged on four sides of the mechanical cabin and the electronic cabin.
Further, the optical chamber is sealed by filling nitrogen.
The invention realizes focusing by adjusting the movement of the imaging surface (namely the target surface of the detector) of the optical system in the optical axis direction, thereby overcoming the change of the focal length of the main lens group caused by temperature, and realizes the separation of the electronic cabin and the optical cabin by adjusting the detector and the target surface of the detector thereon, thereby arranging the electronic component in the electronic cabin, and ensuring the sealing performance of the optical cabin without arranging wire holes and the like in the optical cabin.
Description of the drawings:
FIG. 1 is a cross-sectional view of the complete machine of the present invention;
FIG. 2 is a view of the primary mirror set of the present invention;
FIG. 3 is a side view of a switching group of attenuation sheets of the present invention;
FIG. 4 is a schematic perspective view of a detector adjustment group of the present invention;
FIG. 5 is a schematic view of the installation of FIG. 4;
FIG. 6 is an exterior perspective view of the present invention;
FIG. 7 is a perspective view of FIG. 3;
in the figure: 1-1, an optical cabin; 1-2, a machinery cabin; 1-3, an electronic cabin; 1-4, a transition plate; 2-1, an attenuation sheet motor frame; 2-2, an attenuation sheet motor; 2-3, a gear; 2-4, attenuation sheet rotating disc; 2-5, a photoelectric switch; 2-6, attenuation sheet; 3-1, linear stepping motor; 3-2, a detector mounting plate; 3-3, a guide rail; 3-4, a linear potentiometer; 3-5, photoelectric switch; 3-6, an infrared detector; 4-2, adjusting blocks; 4-3, a mechanical cabin box body; 4-4, positioning ball.
The specific implementation mode is as follows:
as shown in fig. 1, in the present embodiment, the light system of the device of the present invention is sequentially provided with an optical cabin 1-1, a mechanical cabin 1-2, and an electronic cabin 1-3 from left to right along the light incidence direction; the transition plates 1-4 are arranged below the mechanical cabin, the optical cabin is filled with nitrogen for sealing, meanwhile, the mechanical cabin and the electronic cabin are provided with replaceable drying agent boxes, sealing rings are additionally arranged between the cabin bodies for connecting, so that the phenomenon that external air flow enters each cabin to cause damp corrosion is avoided, white fluorocarbon paint is sprayed on the outer surface of each cabin, and the corrosion of marine environment is prevented.
A detector adjusting component is arranged in the mechanical cabin 1-2, a driver and a circuit board of the system are installed in the electronic cabin, the detector adjusting component comprises an infrared detector 3-6 which can move along the direction of an optical axis, and an imaging surface IMA serving as an optical system, namely a detector target surface, is arranged on the infrared detector.
The invention realizes focusing by adjusting the movement of the imaging surface (namely the target surface of the detector) of the optical system in the optical axis direction, thereby overcoming the change of the focal length of the main lens group caused by temperature, and realizes the separation of the electronic cabin and the optical cabin by adjusting the detector and the target surface of the detector thereon, thereby arranging the electronic component in the electronic cabin, and ensuring the sealing performance of the optical cabin without arranging wire holes and the like in the optical cabin.
As shown in fig. 2, the main lens group of the optical system of the present invention adopts a secondary imaging structure, the main lens group optical system of the lens barrel is composed of a positive meniscus lens a, a negative meniscus lens B, a negative meniscus lens C, a positive meniscus lens D, a double concave negative lens E and a double convex positive lens F in sequence from the object plane to the image plane, the focal power is reasonably distributed and even aspheric surfaces are used to balance the system aberration, so that the overall volume of the optical system is small enough, the YNI values of cold reflected light on each refracting surface are improved by changing the curvature of the lenses or changing the intervals, the cold reflected light is defocused when returning to the detector and blocked by the cold diaphragm and other apertures, and the cold reflected intensity is reduced; the sensitivity of each optical element is reduced through the adjustment of the curvature and the thickness, so that the lens is easier to process and adjust.
The specific parameters of the light system are as follows:
(5) focal length: 400mm
(6) F number: 2.0
(7) A detector: refrigeration 640x512, 15um
(8) Working spectral range: 3.7-4.8 um
Data of the following tables, optical parameters of the primary lens group of the present invention
Table one: optical element parameter table
Table two: data relating to aspherical surface
The aspheric expression is:
z represents a position in the optical axis direction, r represents a height in the vertical direction with respect to the optical axis, c represents a radius of curvature, k represents a conic coefficient,
、
、
、
.., represents aspheric coefficients. In aspherical data, E-n represents "
", e.g. 3.0451E-005 stands for
。
As shown in fig. 3, the MTF curve of the primary lens group; as can be seen from FIG. 3, the MTF curve of the lens is close to the diffraction limit, has higher resolution, and meets the transfer function requirement of the refrigeration type long-wave infrared detector with the power of 640x512 and 15 um.
As shown in fig. 4, a front protection sheet and a rear protection sheet are further arranged in the lens barrel and are respectively positioned in front of and behind the main lens group; an attenuation sheet switching group is arranged in the mechanical cabin and positioned on the rear surface of the lens cone, the attenuation sheet switching group comprises a motor frame 2-1, an attenuation sheet driving motor 2-2 fixed on the motor frame, a gear 2-3 fixed on an output shaft of the attenuation sheet driving motor, and an attenuation sheet rotary table 2-4 with a handle and meshed with the gear for transmission, two rotating stations coaxial with the main lens group are arranged on the attenuation sheet rotary table with the handle, different attenuation sheets 2-6 are respectively arranged on the two rotating stations, when the attenuation sheets need to be switched, the attenuation sheet driving motor rotates, the attenuation sheet rotary table is driven to rotate through gear meshing to realize the switching work of the attenuation sheets, when the rotary table moves to a required stroke, a separation blade on the rotary table enables the potential of a photoelectric switch 2-5 to change, and a control panel controls the attenuation sheet driving motor to be powered off, the attenuation sheet drives the motor to stop rotating.
As shown in fig. 5, a guide rail 3-3 and a detector mounting plate 3-2 mounted on the guide rail are further arranged in the machinery compartment 1-2, the infrared detector 3-6 is mounted on the detector mounting plate, a linear stepping motor 3-1 for driving the detector mounting plate to move along the optical axis direction is arranged in the machinery compartment, when the temperature changes, the linear stepping motor 3-1 drives the optical axis of the infrared detector to move back and forth, and the change of the focal length caused by the temperature is adapted by adjusting the position of the target surface of the detector; the linear potentiometer 3-4 feeds back the position through a feedback resistor so as to realize automatic adjustment control, and the front and the back of the detector mounting plate are provided with stop nails which are matched with the photoelectric switches 3-5 for limiting.
As shown in fig. 6, a transition plate adjusting group is arranged at the bottom of the mechanical cabin, in order to meet the requirement of coaxially parallel installation and adjustment of an optical machine optical axis and a main optical system, an interface (a four-way mounting surface) of the optical machine and a telescope main machine needs to have a two-dimensional tilt adjusting function, the two-dimensional tilt adjusting function is divided into pitching adjustment and azimuth adjustment, the pitching adjustment and the azimuth adjustment are not interfered with each other, and the actual installation and adjustment are facilitated, therefore, a transition mechanism is added between the optical machine system and the four-way surface, wherein the transition plate and the optical machine system are used as a primary installation positioning method through a central positioning ball 4-4, and decoupling of the two-dimensional tilt adjustment can be realized; the pitching direction is subjected to angle fine adjustment by jacking the front end or the rear end of the optical-mechanical system through a jack screw in an auxiliary mode according to the actual experimental data conclusion; and after the requirement is met, filling a thin gasket with corresponding thickness at the jacking position and locking screws at all positions, so that fine adjustment in the pitching direction can be realized.
In the horizontal direction, the fine adjustment is realized by combining the optical mechanical system and 2 jackscrew mechanisms arranged on the adjusting block 4-2 on the right side of the transition plate with a central positioning ball mechanism, in the installation process, when the optical mechanical system optical axis and the main system optical axis incline in the azimuth direction, 4 locking screws on the adjusting block 4-2 can be loosened, and the jackscrew mechanism on one side is loosened according to the guidance of test data to push the jackscrew mechanism on the other side, so that the adjustment of the inclination in the azimuth direction is realized.
The invention compensates the phase difference caused by high and low temperature by adjusting the position of the target surface of the detector, the lens complete machine is connected with the four-way table through the transition mechanism, and the transition mechanism has a two-dimensional inclination adjusting function so as to realize the coaxial parallel adjustment of the optical machine and the main optical system by actual adjustment.
The above description is only a preferred embodiment of the present invention, and all equivalent changes and modifications made in accordance with the claims of the present invention should be covered by the present invention.
Claims (7)
1. A medium wave acquisition tracking system, characterized by: the system is sequentially provided with an optical cabin, a mechanical cabin and an electronic cabin from left to right along the light incidence direction, a transition plate is arranged below the mechanical cabin, the optical cabin is formed by an integral sealed lens barrel, and a main lens group optical system of the lens barrel is sequentially formed by a meniscus positive lens A, a meniscus negative lens B, a meniscus negative lens C, a meniscus positive lens D, a biconcave negative lens E and a biconvex positive lens F from an object plane to an image plane; the mechanical cabin is internally provided with a detector adjusting assembly, a driver and a circuit board of the system are installed in the electronic cabin, the detector adjusting assembly comprises an infrared detector which can move along the direction of an optical axis, and the infrared detector is used as an imaging surface of an optical system, namely a detector target surface and is arranged on the infrared detector.
2. The medium wave acquisition tracking system according to claim 1, characterized in that: the specific parameters of the light system are as follows:
focal length: 400 mm;
f number: 2.0;
a detector: refrigerating 640x512, 15 um;
working spectral range: 3.7-4.8 um.
3. The medium wave acquisition tracking system according to claim 1 or 2, characterized in that: the optical parameter table of the main lens group is as follows:
data relating to aspherical surface
The aspheric expression is:
z represents a position in the optical axis direction, r represents a height in the vertical direction with respect to the optical axis, c represents a radius of curvature, k represents a conic coefficient,
、
、
、
.., representing aspheric coefficients;
in aspherical data, E-n represents "
", e.g. 3.0451E-005 stands for
。
4. The medium wave acquisition tracking system according to claim 3, characterized in that: the lens cone is also internally provided with a front protective sheet and a rear protective sheet which are respectively positioned in front of and behind the main lens group; the attenuation sheet switching group comprises a motor frame, an attenuation sheet driving motor fixed on the motor frame, a gear fixed on an output shaft of the attenuation sheet driving motor, and an attenuation sheet rotary table with a handle and in meshing transmission with the gear, wherein the attenuation sheet rotary table with the handle is provided with two rotating stations coaxial with the main mirror group, the two rotating stations are respectively provided with different attenuation sheets, when the attenuation sheets need to be switched, the attenuation sheet driving motor rotates, the attenuation sheet rotary table is driven to rotate through gear meshing to realize the switching work of the attenuation sheets, when the rotary table moves to a required stroke, a separation blade on the rotary table enables the potential of a photoelectric switch to change, the control panel controls the attenuation sheet driving motor to power off, and the attenuation sheet driving motor stops rotating.
5. The medium wave acquisition tracking system according to claim 4, characterized in that: the mechanical cabin is also provided with a guide rail and a detector mounting plate arranged on the guide rail, the infrared detector is arranged on the detector mounting plate, the mechanical cabin is provided with a linear stepping motor for driving the detector mounting plate to move along the direction of the optical axis, when the temperature changes, the linear stepping motor drives the optical axis of the infrared detector to move back and forth, and the position of the target surface of the detector is adjusted to adapt to the change of the focal distance caused by the temperature.
6. The medium wave acquisition tracking system according to claim 5, characterized in that: and skin cover plates are arranged on four sides of the mechanical cabin and the electronic cabin.
7. The medium wave acquisition tracking system according to claim 6, characterized in that: the optical chamber is sealed by filling nitrogen.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202111654699.XA CN114690361B (en) | 2021-12-31 | 2021-12-31 | Medium wave capturing and tracking system |
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|---|---|---|---|
| CN202111654699.XA CN114690361B (en) | 2021-12-31 | 2021-12-31 | Medium wave capturing and tracking system |
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| CN114690361A true CN114690361A (en) | 2022-07-01 |
| CN114690361B CN114690361B (en) | 2023-06-02 |
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| CN211454082U (en) * | 2020-01-03 | 2020-09-08 | 福建福光天瞳光学有限公司 | Large-target-surface high-resolution optical athermalization lens |
| CN112946866A (en) * | 2021-02-02 | 2021-06-11 | 昆明云锗高新技术有限公司 | Low-distortion large-relative-aperture refrigeration type athermalization infrared wide-angle optical system |
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2021
- 2021-12-31 CN CN202111654699.XA patent/CN114690361B/en active Active
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| JP2007212777A (en) * | 2006-02-09 | 2007-08-23 | Nikon Corp | Zoom lens |
| JP2013217952A (en) * | 2012-04-04 | 2013-10-24 | Nikon Corp | Optical system, optical device, method for manufacturing optical system |
| CN203324565U (en) * | 2013-06-28 | 2013-12-04 | 山东神戎电子股份有限公司 | Infrared zooming lens |
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| CN114690361B (en) | 2023-06-02 |
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