CN110785077A - Device and method for splicing large focal plane CCD - Google Patents
Device and method for splicing large focal plane CCD Download PDFInfo
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- CN110785077A CN110785077A CN201911113500.5A CN201911113500A CN110785077A CN 110785077 A CN110785077 A CN 110785077A CN 201911113500 A CN201911113500 A CN 201911113500A CN 110785077 A CN110785077 A CN 110785077A
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- H—ELECTRICITY
- H05—ELECTRIC TECHNIQUES NOT OTHERWISE PROVIDED FOR
- H05K—PRINTED CIRCUITS; CASINGS OR CONSTRUCTIONAL DETAILS OF ELECTRIC APPARATUS; MANUFACTURE OF ASSEMBLAGES OF ELECTRICAL COMPONENTS
- H05K13/00—Apparatus or processes specially adapted for manufacturing or adjusting assemblages of electric components
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- H—ELECTRICITY
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- H01L—SEMICONDUCTOR DEVICES NOT COVERED BY CLASS H10
- H01L27/00—Devices consisting of a plurality of semiconductor or other solid-state components formed in or on a common substrate
- H01L27/14—Devices consisting of a plurality of semiconductor or other solid-state components formed in or on a common substrate including semiconductor components sensitive to infrared radiation, light, electromagnetic radiation of shorter wavelength or corpuscular radiation and specially adapted either for the conversion of the energy of such radiation into electrical energy or for the control of electrical energy by such radiation
- H01L27/144—Devices controlled by radiation
- H01L27/146—Imager structures
- H01L27/14683—Processes or apparatus peculiar to the manufacture or treatment of these devices or parts thereof
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- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01L—SEMICONDUCTOR DEVICES NOT COVERED BY CLASS H10
- H01L27/00—Devices consisting of a plurality of semiconductor or other solid-state components formed in or on a common substrate
- H01L27/14—Devices consisting of a plurality of semiconductor or other solid-state components formed in or on a common substrate including semiconductor components sensitive to infrared radiation, light, electromagnetic radiation of shorter wavelength or corpuscular radiation and specially adapted either for the conversion of the energy of such radiation into electrical energy or for the control of electrical energy by such radiation
- H01L27/144—Devices controlled by radiation
- H01L27/146—Imager structures
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- H01L—SEMICONDUCTOR DEVICES NOT COVERED BY CLASS H10
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- H01L27/14—Devices consisting of a plurality of semiconductor or other solid-state components formed in or on a common substrate including semiconductor components sensitive to infrared radiation, light, electromagnetic radiation of shorter wavelength or corpuscular radiation and specially adapted either for the conversion of the energy of such radiation into electrical energy or for the control of electrical energy by such radiation
- H01L27/144—Devices controlled by radiation
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Abstract
The invention discloses a device and a method for splicing a large focal plane CCD (charge coupled device), which comprises a desk type mounting frame, an imaging substrate frame (6), a hanging platform (5), a front and back station translation positioning mechanism and a CCD guide lifting mounting pull rod linkage mechanism, wherein the desk type mounting frame is provided with a desk type positioning mechanism; the imaging substrate frame (6) is arranged in an upper mounting frame (11) of the desktop mounting frame, and the imaging substrate (60) is arranged in the imaging substrate frame (6); the fixed parts of the front and rear station translation positioning mechanisms are fixed on the left side and the right side of an upper installation frame (11), the lifting platforms (5) are arranged above an imaging substrate (60), four Charge Coupled Devices (CCD) (17)2 multiplied by 2 are installed on the imaging substrate (60) in a splicing mode through a CCD guide lifting installation pull rod linkage mechanism, installation of a plurality of CCDs on the same substrate is achieved, positioning accuracy and parallelism are effectively controlled, and electrostatic damage can be effectively reduced.
Description
Technical Field
The invention relates to the technical field of positioning and mounting of a mechanical structure and a photoelectric sensor, is suitable for high-precision mounting and dismounting of the sensor, and particularly relates to a device and a method for splicing a large focal plane CCD (charge coupled device).
Background
With the increasing demand of earth surface observation, surveying and astronomical observation in the direction of large field of view and high resolution, the requirements on the size and accuracy of an image sensor are high. Due to the limitation of the process, the maximum number of pixels that can be accommodated by the current single-chip Charge Coupled Device (CCD) is 10K × 10K, and the size of the pixel is 9 um. As the size of CCDs continues to increase, the high cost of CCDs, the extremely low yield and the high maintenance cost become limiting factors in their development. In order to break through the limitation of a single CCD pixel, the imaging focal plane is generally enlarged by adopting a CCD splicing mode, and the imaging focal plane is typically an active GAIA satellite (European space agency) and a large-caliber all-day inspection telescope (LSST, USA) under construction. The technical verification of the small-scale CCD focal plane splicing camera is also developed in China, and a solid foundation is laid for greatly improving the capability of developing a large-size high-precision splicing camera.
As shown in fig. 1, the single CCD has a specific structure including two mounting screw holes 171 and three mounting posts 172 on the back surface of the single CCD.
The CCD splicing technology is mainly divided into optical splicing and mechanical splicing. In the optical splicing, a full field of view is divided into a plurality of sub-fields of view by using a light splitting element, and single linear array or area array CCD images of each sub-field of view are spliced by using an image splicing technology to obtain a full field of view image, but the imaging quality is greatly influenced by aberration and vignetting effect caused by the splicing mode. The mechanical splicing is to splice a plurality of CCDs in a mechanical manner in a linear manner or in a staggered manner to form an image plane, which is also the splicing manner adopted by GAIA and LSST. The key to mechanical splicing is to improve the flatness of the image plane and to reduce the gap between adjacent CCDs, which requires the operator to detach the single die CCD from the package provided by the vendor and mount it on the imaging substrate for adjustment. In consideration of the influence factors such as electrostatic discharge, oil stain, dust, water stain and the like, an operator should avoid direct contact with the CCD in the whole process, and meanwhile, the protection of indirect operation is considered.
The existing detector dismounting device basically adopts a mode of clamping a detector to a mounting position by a tool, the clamping tool designed according to the appearance of the detector is difficult to realize on a bare chip image detector, the positioning precision, the efficiency and the reliability of the clamping tool are also very limited, and the clamping tool is only suitable for mounting the detector with low precision and low requirement.
Disclosure of Invention
The invention aims to provide a device and a method for splicing large focal plane CCDs, which adopt a bottom-up installation mode, and the imaging surface of the CCDs is always downward before all the CCDs are installed, so that the imaging surface of the CCDs can be effectively prevented from being polluted and damaged in the operation process; the installation of a plurality of CCDs on the same substrate is realized, the positioning precision and the parallelism are effectively controlled, and the repeatable operation is higher; the operation to CCD in the whole operation process is through the indirect effect of installation pull rod, and whole operation platform ground connection can effectively reduce electrostatic damage. In addition, a damping and linkage device is designed on the operation platform, and in the operation process, the linkage, speed limitation and hovering of the CCD and a Flexible Printed Circuit (FPC) can be realized in a assisting mode, so that the controllability of the whole process is improved.
The purpose of the invention is realized by the following technical scheme:
a device for splicing large focal plane CCD is used for splicing and installing 172 multiplied by 2 arrays of four charge coupled devices CCD on an imaging substrate 60, and comprises a table type installation frame, an imaging substrate frame 6, a hanging platform 5, a front and back station translation positioning mechanism and a CCD guide lifting installation pull rod linkage mechanism;
the imaging substrate frame 6 is arranged in the upper mounting frame 11 of the desktop mounting frame, and the imaging substrate 60 is arranged in the imaging substrate frame 6; the imaging substrate 60 is provided with four sets of mounting through holes 601 corresponding to the two mounting threaded holes 171 of the CCD 17;
the fixed parts of the front and rear station translation positioning mechanisms are fixed on the left side and the right side of the upper installation frame 11, and the lifting platforms 5 are installed on the moving parts of the front and rear station translation positioning mechanisms and move between the front station and the rear station;
the hanging platform 5 is arranged above the imaging substrate 60, two guide lifting pull rods 2 of the CCD guide lifting installation pull rod linkage mechanism sequentially penetrate through a guide hole in the vertical direction on the hanging platform 5 and a waist-shaped hole 602 on the imaging substrate 60 from top to bottom, the lower end of the guide lifting installation pull rod linkage mechanism is detachably connected with a flexible circuit board FPC connector 14, the FPC connector 14 is connected with an FPC15, and an FPC15 is connected with a CCD17 arranged on a carrying platform 18 of the desktop installation frame; a locking damper 4 is arranged between the at least one guide lifting pull rod 2 and the guide hole of the hanging platform 5;
two CCD installation pull rods 3 of the CCD guide lifting installation pull rod linkage mechanism sequentially penetrate through a guide hole and an installation through hole 601 in the vertical direction on the hanging platform 5 from top to bottom, and the lower ends of the two CCD installation pull rods are detachably connected with the two installation threaded holes 171 through threads; and a locking damper 4 is arranged between the at least one CCD mounting pull rod 3 and the guide hole of the hanging platform 5.
Two groups of CCD guide lifting installation pull rod linkage mechanisms are arranged on two stations along the left and right directions respectively; or the CCD guide lifting installation pull rod linkage mechanisms are in one group, and the left and right positions are changed between two stations in the left and right directions.
The CCD guide lifting installation pull rod linkage mechanism further comprises two linkage blocks 1, the two linkage blocks 1 are arranged up and down, and the guide lifting pull rod 2 sequentially penetrates through the two linkage blocks 1 from top to bottom and then penetrates through a guide hole in the hanging platform 5; the CCD installation pull rod 3 penetrates through the linkage block 1 below from top to bottom and then penetrates through a guide hole in the hanging platform 5.
The locking damper 4 comprises a pressing cylinder 41, a collar 42, a tetrafluoroethylene gasket 43, a rubber ring 44 and a base cylinder 45;
the base cylinder 45 is fixed at the upper opening of a guide hole on the hanging platform 5 and is concentric with the guide hole, a rubber ring 44, a tetrafluoroethylene gasket 43 and a shaft collar 42 are sequentially arranged in the upper inner hole in the base cylinder 45, inner threads are arranged on the inner wall of the pressing cylinder 41, the lower end of the pressing cylinder penetrates through the shaft collar 42, the tetrafluoroethylene gasket 43 and the rubber ring 44 in sequence and then is connected with outer threads arranged on the cylinder wall of the base cylinder 45, and the pressing cylinder 41 is rotated to lock or loosen a guide lifting pull rod 2 or a CCD (charge coupled device) installation pull rod 3 of the CCD guide lifting installation pull rod linkage mechanism.
The front-rear station translation positioning mechanism comprises a sliding block 9 serving as a moving part, a guide rail 10 serving as a fixed part, a left transverse positioning block 7, a right transverse positioning block 7 and two positioning strips 12, wherein the two positioning strips 12 are respectively arranged on the left side and the right side of an upper mounting frame 11, the two transverse positioning blocks 7 are symmetrically arranged on the sliding block 9 in the left-right direction, and a hanging platform 5 is arranged on the sliding block 9; the extension positioning parts of the transverse positioning block 7 are arranged between the locking positioning columns 121 at the front end and the rear end of the positioning strip 12, so that the positioning and locking between the front station and the rear station are realized.
The imaging substrate frame 6 is arranged in the upper mounting frame 11 of the desktop mounting frame through two balance positioning devices 8 at the front and the back respectively;
the balance positioning device 8 comprises a right-angle pressing bar 81, a balance cantilever 82 and a round head positioning pin 83; the lower end of the vertical edge of the right-angle depression bar 81 is fixed above the upper mounting frame 11, the inner end of the transverse edge is connected with a balance cantilever 82, and the lower end of the balance cantilever 82 is provided with a round head positioning pin 83;
the round head positioning pin 83 is matched and positioned with the balance positioning hole 603 of the imaging substrate 60.
The imaging substrate frame 6 comprises a hand-screwed bolt 61, a side frame 62, a polytetrafluoroethylene groove pad 63 and a protective back plate 64;
four side frames 62 are connected with a combined square frame through hand-screwed bolts 61, and four polytetrafluoroethylene groove pads 63 are respectively arranged in the side frames 62 to support the imaging substrate 60; a protective backing 64 is provided below the square frame.
A method for splicing large focal plane CCDs (charge coupled devices) is based on the device and comprises the following steps:
step one, mounting the CCD and the imaging substrate
and step 17, linking the two guide lifting pull rods 2 with the two CCD installation pull rods 3.
Step two, lifting the CCD to the installation position for installation
Step 21, releasing the damper 4 from locking the two guide lifting pull rods 2 and the two CCD installation pull rods 3, and pulling the CCD guide lifting installation pull rod linkage mechanism to the lower part of the installation position;
and step 23, separating the CCD installation pull rod 3 from the CCD17, separating the guide lifting pull rod 2 from the FPC15, lifting the CCD guide lifting installation pull rod linkage mechanism to the highest position, and hovering to complete the installation of one piece of CCD 17.
Two groups of CCD guide lifting installation pull rod linkage mechanisms are arranged above two stations in front along the left-right direction respectively; the two groups of lifting installation pull rod linkage mechanisms simultaneously complete the installation of two pieces of CCDs 17 of two stations in the left and right directions according to the step one and the step two;
then, the locking of the front and rear station translation positioning mechanisms on the hanging platform 5 is released; and transversely moving the hanging platform 5 to be above the two stations at the back in the front-back direction, and mounting the two CCD17 at the two stations at the back, wherein the operation steps are the same as the first step and the second step.
The CCD guide lifting installation pull rod linkage mechanisms are provided with one group and are arranged above the station in front of the left side; the lifting installation pull rod linkage mechanism completes installation of the CCD17 of the station at the front left side according to the first step and the second step;
then, the locking of the front and rear station translation positioning mechanisms on the hanging platform 5 is released; transversely moving the hanging platform 5 to be above the station at the rear of the left side, and mounting the CCD17 of the station at the rear of the left side, wherein the operation steps are the same as the first step and the second step;
the CCD guide lifting installation pull rod linkage mechanism is shifted to the right rear station left and right, the CCD17 of the right rear station is installed, and the operation steps are the same as the first step and the second step;
then, the locking of the front and rear station translation positioning mechanisms on the hanging platform 5 is released; and transversely moving the hanging platform 5 to be above the station at the front right side, and mounting the CCD17 of the station at the front right side, wherein the operation steps are the same as the first step and the second step.
According to the technical scheme provided by the invention, the device and the method for splicing the large-focal-plane CCDs provided by the embodiment of the invention finish the installation of a plurality of CCDs on the imaging substrate only by two installation threaded holes and three installation columns on the back of a single CCD, and simultaneously ensure the safety and the final installation precision in the process. Meanwhile, considering that the CCD imaging surface is not provided with a cover window and that electrostatic discharge may damage or irreversibly degrade the device, the mounting process should reduce unnecessary contact with the CCD and take comprehensive antistatic treatment precautions.
The invention adopts a bottom-up installation mode, and the imaging surface of the CCD is always downward before all the CCDs are installed, thereby effectively preventing the imaging surface of the CCD from being polluted and damaged in the operation process; the installation of a plurality of CCDs on the same substrate is realized, the positioning precision and the parallelism are effectively controlled, and the repeatable operation is higher; the operation to CCD in the whole operation process is through the indirect effect of installation pull rod, and whole operation platform ground connection can effectively reduce electrostatic damage. In addition, a damping and linkage device is designed on the operation platform, and in the operation process, the damping and linkage device can assist in realizing linkage, speed limit and hovering of the CCD and the FPC (flexible Printed circuit), so that the controllability of the whole process is improved.
Drawings
In order to more clearly illustrate the technical solutions of the embodiments of the present invention, the drawings needed to be used in the description of the embodiments are briefly introduced below, and it is obvious that the drawings in the following description are only some embodiments of the present invention, and it is obvious for those skilled in the art to obtain other drawings based on the drawings without creative efforts.
FIG. 1 is a schematic structural diagram of a CCD;
FIG. 2 is a schematic structural diagram of an apparatus for splicing a large focal plane CCD according to an embodiment of the present invention;
FIG. 3 is a schematic structural diagram of an imaging substrate frame of the device for splicing large-focal-plane CCDs according to the embodiment of the present invention;
FIG. 4 is a schematic structural diagram of a balance positioning device of the device for splicing large-focal-plane CCDs according to the embodiment of the present invention;
fig. 5 is a schematic structural diagram of a rectangular connector clamp spring of the device for splicing large focal plane CCDs according to the embodiment of the present invention;
fig. 6 is a schematic structural diagram of a locking damper of the device for splicing the large-focal-plane CCD according to the embodiment of the present invention.
Fig. 7 is a schematic view of a linkage block structure of the device for splicing large-focal-plane CCDs according to the embodiment of the present invention.
Detailed Description
The technical solutions in the embodiments of the present invention are clearly and completely described below with reference to the drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only a part of the embodiments of the present invention, and not all embodiments. All other embodiments, which can be derived by a person skilled in the art from the embodiments of the present invention without making any creative effort, shall fall within the protection scope of the present invention.
Embodiments of the present invention will be described in further detail below with reference to the accompanying drawings.
Example one
As shown in fig. 2, an apparatus for CCD stitching with a large focal plane is used to arrange four pieces of CCD17 into a 2 × 2 array for stitching and mounting on an imaging substrate 60, in this example, the 2 × 2 array of four pieces of CCD17 is taken as an example, and the mounting process is divided into four stations, i.e., a front left station, a rear left station, a front right station, and a rear right station, which will be referred to in the following description. Other combinations can be derived from the present examples and are within the scope of the present patent.
The device specifically comprises a desk type mounting frame, an imaging substrate frame 6, a hanging platform 5, a front-back station translation positioning mechanism and a CCD guide lifting mounting pull rod linkage mechanism.
The desktop installation frame comprises an upper installation frame 11 and a lower object carrying platform 18, the upper installation frame 11 and the lower object carrying platform 18 are connected and installed through four supporting columns 16, and four stabilizing pads 19 are respectively installed at four corners below the object carrying platform 18 and used for supporting the object carrying platform 18 and carrying out horizontal adjustment. The platform 18 is required to be rigid, and the desk-top mounting frame is made of light aluminum alloy and consists of a foot pad 19, an aluminum alloy flat platform 18 and four aluminum alloy cylindrical struts 16. Feet 19 are mounted on the underside of carrier platform 18 for leveling of the desktop mounting frame and four aluminium alloy posts 16 can be embedded in the upper surface of carrier platform 18 for supporting upper mounting frame 11. The upper mounting frame 11 is made of aluminum alloy and is used for bearing the front and rear station translation positioning mechanism.
As shown in fig. 3, the imaging substrate frame 6 is used for supporting and protecting the imaging substrate 60, and the imaging substrate frame 6 comprises a hand-screwed bolt 61, a side frame 62, a teflon groove pad 63 and a protective back plate 64; specifically, four side frames 62 are connected with a combined square frame through hand-screwed bolts 61, and four polytetrafluoroethylene groove pads 63 are respectively installed in the side frames 62 to support the imaging substrate 60; the deformation of the imaging substrate 60 under stress and edge scratch are reduced; the protective back plate 64 is arranged below the square frame, and can protect the imaging surface of the CCD17 after splicing and installation are finished. In practice, the imaging substrate 60 is first loaded into the imaging substrate frame 6, the ptfe pocket pads 63 are first secured to the inner pockets of the four side frames 62, and the four side frames are then joined end-to-end to clamp the imaging substrate 60.
The imaging substrate frame 6 is installed in the upper mounting frame 11 of the desktop mounting frame, and specifically, the imaging substrate 60 with the imaging substrate frame 6 is installed in the upper mounting frame 11 by using the metal sheet 110. Four metal pieces made of aluminum alloy are fixed to the upper side of the upper mounting frame 11 for pulling up the imaging substrate with the frame.
In this example, the imaging substrate frame 6 is mounted in the upper mounting frame 11 of the table mounting frame by two balance positioning devices 8 at the front and rear; as shown in fig. 4, the balance positioning device 8 includes a right-angle bead 81, a balance cantilever 82 and a round head positioning pin 83; the lower end of the vertical edge of the right-angle depression bar 81 is fixed above the upper mounting frame 11, the inner end of the transverse edge is connected with a balance cantilever 82, and the lower end of the balance cantilever 82 is provided with a round head positioning pin 83; the round head positioning pin 83 is matched and positioned with the balance positioning hole 603 of the imaging substrate 60. The right-angle hold-down bar 81 and the balance cantilever 82 are made of aluminum alloy, and the round-head positioning pin 83 is made of stainless steel. In practical use, in addition to ensuring the flatness of the contact surface of the right-angle bead 81 with the imaging substrate 60, the height dimension of the right-angle bead 81 is required to be processed with a positive tolerance, so that the balance positioning device presses the imaging substrate 60 downward to ensure that the imaging substrate 60 is parallel to the mounting upper mounting frame 11.
The imaging substrate 60 is mounted in the imaging substrate frame 6; the imaging substrate 60 is provided with four sets of mounting through holes 601 corresponding to the two mounting threaded holes 171 of the CCD 17; and six waist-shaped holes 602 are formed at the same time for the passage of the rear guide lifting pull rod 2. A balance positioning hole 603 is also formed for subsequent positioning. There are also provided mounting fixing holes 604 through which the three mounting posts 172 of the CCD17 pass, respectively, of the imaging substrate 60.
The fixed parts of the front and rear station translation positioning mechanisms are fixed on the left side and the right side of the upper installation frame 11, and the lifting platforms 5 are installed on the moving parts of the front and rear station translation positioning mechanisms and move between the front station and the rear station; the front-rear station translation positioning mechanism comprises a sliding block 9 serving as a moving part, a guide rail 10 serving as a fixed part, a left transverse positioning block 7, a right transverse positioning block 7 and two positioning strips 12, wherein the two positioning strips 12 are respectively arranged on the left side and the right side of an upper mounting frame 11, the positioning strips 12 are made of stainless steel, the two transverse positioning blocks 7 are symmetrically arranged on the sliding block 9 in the left-right direction, and a hanging platform 5 is arranged on the sliding block 9; the extending positioning part of the transverse positioning block 7 is limited between the locking positioning columns 121 at the front end and the rear end of the positioning strip 12, and the transverse positioning hand-screwed nut 120 can assist in realizing the positioning and locking between the front station and the rear station.
The hanging platform 5 is made of aluminum alloy with strong rigidity and light weight, is fixedly connected to the sliding block 9 through the transverse positioning block 7 in a bearing mode, and can transversely slide along with the sliding block 9 at a low resistance and a uniform speed. The thickness of the top of the hanging platform 5 reaches 45mm, and a PTFE resin type oilless bushing is embedded into a guide hole in the vertical direction up and down, so that the pull rod is ensured to be vertically downward. The oilless lining material has a self-lubricating effect, and ensures that the relative sliding between the pull rod and the lifting platform 5 is smooth and has no blockage.
Two groups of CCD guide lifting installation pull rod linkage mechanisms are arranged on two stations along the left and right directions respectively; or the CCD guide lifting installation pull rod linkage mechanisms are in one group, and the left and right positions are changed between two stations in the left and right directions.
The example is a group of CCD guide lifting installation pull rod linkage mechanisms, adopts a left-right transposition mode, and particularly, seven guide holes in the vertical direction are formed in a hanging platform 5, and a middle hole and three holes on the left side are used in the left position; and in the right position, a middle hole and three holes on the right side are used, after the left side is finished, the three pull rods on the left side are pulled out, the positions are changed to the three holes on the right side, and the pull rod in the middle is shared.
If two groups of CCD guide lifting installation pull rod linkage mechanisms are adopted, the lifting platform 5 can be provided with seven guide holes in the vertical direction, the middle holes are shared, and the lengths of the pull rods can be different; eight guide holes in the vertical direction can be formed in the hanging platform 5 as long as the structure allows.
The CCD guide lifting installation pull rod linkage mechanism comprises two guide lifting pull rods 2, two CCD installation pull rods 3 and two linkage blocks 1, wherein the two linkage blocks 1 are arranged up and down, and the guide lifting pull rods 2 sequentially penetrate through the two linkage blocks 1 from top to bottom and then penetrate through guide holes in a hanging platform 5; the CCD installation pull rod 3 penetrates through the linkage block 1 below from top to bottom and then penetrates through a guide hole in the hanging platform 5. The linkage block 1 is provided with a locking nut for locking the guide lifting pull rod 2 and the CCD installation pull rod 3 to realize linkage. As shown in fig. 7, two linkage blocks 1 are respectively provided with 4 linkage block hand-screwed nuts 102, the linkage block side hand-screwed nuts 102 on both sides are used for tightly holding the guide lifting pull rod 2 by extruding side notches of the linkage blocks 1, and the hand-screwed nuts 101 in the middle two linkage blocks can be screwed into the threaded holes to tightly push the CCD installation pull rod 3, so that linkage of four pull rods is realized.
The guide lifting pull rod 2 and the CCD installation pull rod 3 are made of high-hardness steel, the tail parts of the four pull rods are provided with threads, and the middle two CCD installation pull rods 3 are connected with two installation threaded holes 171 of the CCD17 and can be linked through a linkage block 1 made of aluminum alloy; two direction lifting pull rod 2 of side cooperate and use rectangular connector jump ring 13 to act on FPC connector 14, also can link through linkage piece 1. The speed limit and the hovering of the CCD installation pull rod 3 are realized by a locking damper 4.
Hanging platform 5 locate formation of image base plate 60 top, CCD direction lift installation pull rod link gear's two direction lift pull rods 2 pass the guiding hole of vertical direction on hanging platform 5 and the waist shape hole 602 on the formation of image base plate 60 downwards by the top in proper order, the connection flexible circuit board FPC connector 14 can be dismantled to the lower extreme, here concrete through as shown in figure 5, adopt a rectangular connector jump ring 13, realize lift pull rod 2 and FPC connector 14 quick detachable connection, rectangular connector jump ring 13 can adopt the mode preparation that 3D printed, can conveniently adapt to different sizes. The FPC connector 14 is connected to an FPC15, and the FPC15 is connected to a CCD17 provided on the stage 18 of the desk mount frame. The CCD17 has downward imaging surface, and before all CCD's are installed, the CCD's imaging surface is downward all the time, can effectively avoid the CCD imaging surface to receive pollution and damage in the operation process.
Two CCD installation pull rods 3 of the CCD guide lifting installation pull rod linkage mechanism sequentially penetrate through a guide hole and an installation through hole 601 in the vertical direction on the hanging platform 5 from top to bottom, and the lower ends of the two CCD installation pull rods are detachably connected with the two installation threaded holes 171 through threads.
In addition, in the embodiment, a locking damper 4 is arranged between at least one guide lifting pull rod 2 and a guide hole of the hanging platform 5; and a locking damper 4 is arranged between the at least one CCD mounting pull rod 3 and the guide hole of the hanging platform 5. As can be seen, there are four lock dampers 4 respectively provided at the left and right two stations.
As shown in fig. 6, the locking damper 4 includes a pressing cylinder 41, a collar 42, a tetrafluoroethylene washer 43, a rubber ring 44 and a base cylinder 45; the base cylinder 45 is fixed at the upper opening of a guide hole on the hanging platform 5 and is concentric with the guide hole, a rubber ring 44, a tetrafluoroethylene gasket 43 and a shaft ring 42 are sequentially arranged in an upper inner hole in the base cylinder 45, an inner thread is arranged on the inner wall of the pressing cylinder 41, the lower end of the pressing cylinder 41 sequentially penetrates through the shaft ring 42, the tetrafluoroethylene gasket 43 and the rubber ring 44 and is connected with an outer thread arranged on the cylinder wall of the base cylinder 45, and the pressing cylinder 41 is rotated to lock or loosen a guide lifting pull rod 2 or a CCD (charge coupled device) mounting pull rod 3 of the CCD guide lifting mounting pull rod linkage mechanism. The locking degree of the rotary pressing cylinder 41 is properly adjusted, so that the guide lifting pull rod 2 and the CCD installation pull rod 3 can move up and down under certain damping, and hovering is realized. Specifically, the rotary drum 41 is made of stainless steel (AISI 304), ensuring rigidity. The pressure cylinder 41 is rotated, the internal thread of the inner wall of the pressure cylinder 41 is meshed with the external thread of the base cylinder 45, the tetrafluoroethylene gasket 43 and the rubber ring 44 are extruded through the shaft collar 42, the inner hole of the rubber ring 44 is reduced, the guide lifting pull rod 2 and the CCD installation pull rod 3 are tightly installed, and speed limiting and hovering are achieved.
Example two
Referring to fig. 1 to 6, a method for splicing a large-focal-plane CCD, based on the apparatus of the first embodiment, includes the following specific steps:
step one, mounting of the CCD17 and the imaging substrate 60
and step 17, linking the two guide lifting pull rods 2 with the two CCD installation pull rods 3.
Step two, lifting the CCD to the installation position for installation
Step 21, releasing the damper 4 from locking the two guide lifting pull rods 2 and the two CCD installation pull rods 3, and pulling the CCD guide lifting installation pull rod linkage mechanism to the lower part of the installation position;
and step 23, separating the CCD installation pull rod 3 from the CCD17, separating the guide lifting pull rod 2 from the FPC15, lifting the CCD guide lifting installation pull rod linkage mechanism to the highest position, and hovering to complete the installation of one piece of CCD 17.
The steps just described complete the installation of the CCD17 at one station, and the way to continue the installation of other stations is as follows:
two groups of CCD guide lifting installation pull rod linkage mechanisms are arranged above two stations in front along the left-right direction respectively; the two groups of lifting installation pull rod linkage mechanisms simultaneously complete the installation of two pieces of CCDs 17 of two stations in the left and right directions according to the step one and the step two;
then, the locking of the front and rear station translation positioning mechanisms on the hanging platform 5 is released; the operation steps are the same as the first step and the second step by moving the platform 5 laterally to the upper side of the two rear stations in the front-rear direction and mounting the two CCDs 17 at the two rear stations.
The CCD guide lifting installation pull rod linkage mechanism is provided with a group and is arranged above the station in front of the left side; the lifting installation pull rod linkage mechanism completes installation of the CCD17 of the station at the front left side according to the first step and the second step;
then, the locking of the front and rear station translation positioning mechanisms on the hanging platform 5 is released; transversely moving the hanging platform 5 to be above the station at the rear of the left side, and mounting the CCD17 at the station at the rear of the left side, wherein the operation steps are the same as the first step and the second step;
the CCD guide lifting installation pull rod linkage mechanism is shifted to the right rear station left and right, the CCD17 of the right rear station is installed, and the operation steps are the same as the first step and the second step;
then, the locking of the front and rear station translation positioning mechanisms on the hanging platform 5 is released; and transversely moving the hanging platform 5 to be above the station at the front right side, and mounting the CCD17 of the station at the front right side, wherein the operation steps are the same as the first step and the second step.
The above description is only for the preferred embodiment of the present invention, but the scope of the present invention is not limited thereto, and any changes or substitutions that can be easily conceived by those skilled in the art within the technical scope of the present invention are included in the scope of the present invention. Therefore, the protection scope of the present invention shall be subject to the protection scope of the claims.
Claims (10)
1. An apparatus for splicing large focal plane CCD, which is used for splicing and installing four pieces of CCD (17)2 x 2 arrays on an imaging substrate (60), and is characterized in that: the device comprises a desk type mounting frame, an imaging substrate frame (6), a hanging platform (5), a front and back station translation positioning mechanism and a CCD guide lifting mounting pull rod linkage mechanism;
the imaging substrate frame (6) is arranged in an upper mounting frame (11) of the desktop mounting frame, and the imaging substrate (60) is arranged in the imaging substrate frame (6); the imaging substrate (60) is provided with four groups of mounting through holes (601) corresponding to two mounting threaded holes (171) of the CCD (17);
the fixed parts of the front and rear station translation positioning mechanisms are fixed on the left side and the right side of an upper mounting frame (11), and the lifting platforms (5) are mounted on the movable parts of the front and rear station translation positioning mechanisms and move between the front station and the rear station;
the hanging platform (5) is arranged above the imaging substrate (60), two guide lifting pull rods (2) of the CCD guide lifting installation pull rod linkage mechanism sequentially penetrate through a guide hole in the vertical direction in the hanging platform (5) and a waist-shaped hole (602) in the imaging substrate (60) from top to bottom, the lower end of the guide lifting installation pull rod linkage mechanism is detachably connected with a flexible circuit board FPC connector (14), the FPC connector (14) is connected with an FPC (15), and the FPC (15) is connected with a CCD (17) arranged on a carrying platform (18) of the desktop installation frame; a locking damper (4) is arranged between the at least one guide lifting pull rod (2) and the guide hole of the hanging platform (5);
two CCD installation pull rods (3) of the CCD guide lifting installation pull rod linkage mechanism sequentially penetrate through a guide hole and an installation through hole (601) in the vertical direction on the hanging platform (5) from top to bottom, and the lower ends of the two CCD installation pull rods are detachably connected with two installation threaded holes (171) through threads; a locking damper (4) is arranged between the at least one CCD mounting pull rod (3) and the guide hole of the hanging platform (5).
2. The device for splicing the large focal plane CCD as claimed in claim 1, wherein two groups of linkage mechanisms of the CCD guide lifting installation pull rods are respectively arranged on two stations along the left and right directions; or the CCD guide lifting installation pull rod linkage mechanisms are in one group, and the left and right positions are changed between two stations in the left and right directions.
3. The device for splicing the large focal plane CCD (charge coupled device) according to claim 2, wherein the CCD guide lifting installation pull rod linkage mechanism further comprises two linkage blocks (1), the two linkage blocks (1) are arranged up and down, and the guide lifting pull rod (2) sequentially penetrates through the two linkage blocks (1) from top to bottom and then penetrates through a guide hole in the hanging platform (5); the CCD installation pull rod (3) penetrates through the linkage block (1) below from top to bottom and then penetrates through a guide hole in the hanging platform (5).
4. The device for CCD splicing of large focal planes according to claim 1, 2 or 3, wherein the locking damper (4) comprises a pressing cylinder (41), a shaft ring (42), a tetrafluoroethylene gasket (43), a rubber ring (44) and a base cylinder (45);
the upper opening of the guide hole on the hanging platform (5) is fixed on the base cylinder (45) and is concentric with the guide hole, a rubber ring (44), a tetrafluoroethylene gasket (43) and a shaft collar (42) are sequentially installed in an inner hole above the base cylinder (45), an inner wall of the pressing cylinder (41) is provided with an internal thread, the lower end of the pressing cylinder sequentially penetrates through the shaft collar (42), the tetrafluoroethylene gasket (43) and the rubber ring (44) and then is connected with an external thread arranged on the cylinder wall of the base cylinder (45), and the guiding lifting pull rod (2) or the CCD installing pull rod (3) of the CCD guiding lifting installing pull rod linkage mechanism is locked or loosened by rotating the pressing cylinder (41).
5. The device for splicing the large focal plane CCD (charge coupled device) according to claim 1, 2 or 3, wherein the front and back station translation positioning mechanism comprises a sliding block (9) serving as a moving part and a guide rail (10) serving as a fixed part, and further comprises a left transverse positioning block (7), a right transverse positioning block (7) and two positioning strips (12), the two positioning strips (12) are respectively arranged on the left side and the right side of the upper mounting frame (11), the two transverse positioning blocks (7) are arranged on the sliding block (9) in a left-right symmetrical manner, and the sliding block (9) is provided with a hanging platform (5); the extension positioning parts of the transverse positioning blocks (7) are arranged between the locking positioning columns (121) at the front end and the rear end of the positioning strip (12), so that the positioning and the locking between the front station and the rear station are realized.
6. The device for CCD splicing of large focal planes according to claim 1, 2 or 3, wherein the imaging substrate frame (6) is arranged in an upper mounting frame (11) of a desktop mounting frame by two balance positioning devices (8) respectively at the front and the back;
the balance positioning device (8) comprises a right-angle pressing bar (81), a balance cantilever (82) and a round head positioning pin (83); the lower end of the vertical edge of the right-angle depression bar (81) is fixed above the upper mounting frame (11), the inner end of the transverse edge is connected with a balance cantilever (82), and the lower end of the balance cantilever (82) is provided with a round-head positioning pin (83);
the round head positioning pin (83) is matched and positioned with a balance positioning hole (603) of the imaging substrate (60).
7. The device for splicing large focal planes CCD (charge coupled device) according to claim 1, 2 or 3, wherein the imaging substrate frame (6) comprises a hand-screwed bolt (61), a side frame (62), a polytetrafluoroethylene groove pad (63) and a protective back plate (64);
four side frames (62) are connected with a combined square frame through hand-screwed bolts (61), and four polytetrafluoroethylene groove pads (63) are respectively arranged in the side frames (62) to support the imaging substrate (60); a protective backing plate (64) is arranged below the square frame.
8. Method for large focal plane CCD stitching, based on the device according to any one of claims 1 to 7, comprising:
step one, mounting the CCD and the imaging substrate
Step 11, two guide lifting pull rods (2) of the CCD guide lifting installation pull rod linkage mechanism and two CCD installation pull rods (3) are linked and lifted to the highest position of the lifting platform (5); the suspension of the CCD guide lifting installation pull rod linkage mechanism is realized through the locking damper (4);
step 12, fixing the imaging substrate frame (6) with the imaging substrate (60) on the upper mounting frame (11);
step 13, placing the CCD (17) with the protective sleeve on an object carrying platform (18) with the front face facing downwards by adopting a CCD holding tool;
14, releasing the locking damper (4) of the CCD mounting pull rod (3), adjusting the front and rear transverse positions of the hanging platform (5), slowly lowering the CCD mounting pull rod (3) to enable the CCD mounting pull rod to penetrate through a mounting through hole (601) in the mounting position of the imaging substrate (60) to the position of a mounting threaded hole (171) in the back of the CCD (17); a locking hanging platform (5) of the front and rear station translation positioning mechanism;
step 15, releasing the linkage of the CCD guide lifting installation pull rod linkage mechanism, and screwing the front ends of the two CCD installation pull rods (3) into the installation threaded holes (171);
step 16, slowly putting down the guide lifting pull rod (2) to ensure that the distance from the bottom end of the guide lifting pull rod (2) to the bottom end of the CCD installation pull rod (3) is equal to the length of an FPC (15) of a CCD (17), then connecting the bottom end of the guide lifting pull rod (2) with the FPC (15),
and step 17, linking the two guide lifting pull rods (2) with the two CCD installation pull rods (3).
Step two, lifting the CCD to the installation position for installation
Step 21, releasing the dampers (4) locked by the two guide lifting pull rods (2) and the two CCD installation pull rods (3), and pulling the CCD guide lifting installation pull rod linkage mechanism to the lower part of the installation position;
step 22, tightening the locking damper (4), and installing a pull rod linkage mechanism on the CCD in a guiding lifting manner to realize hovering; disassembling a CCD protective sleeve of the CCD (17); unlocking the damper (4), and pulling up the CCD (17) to the mounting position; three mounting columns (172) of the CCD (17) penetrate through corresponding mounting fixing holes (604) of the imaging substrate (60), and a torque wrench is adopted to screw copper column bolts on the mounting columns (172) by using the same torque for fixing;
and step 23, separating the CCD installation pull rod (3) from the CCD (17), separating the guide lifting pull rod (2) from the FPC (15), and lifting the CCD guide lifting installation pull rod linkage mechanism to the highest position for hovering to finish the installation of one CCD (17).
9. The method for splicing the large focal plane CCD as claimed in claim 8, wherein two groups of linkage mechanisms of the CCD guide lifting installation pull rods are respectively arranged above two stations in front along the left-right direction; the two groups of lifting installation pull rod linkage mechanisms simultaneously complete the installation of two CCD (17) of two stations in the left and right directions according to the step one and the step two;
then, the locking of the front and rear station translation positioning mechanisms on the hanging platform (5) is released; and transversely moving the hanging platform (5) to the positions above two stations at the back in the front-back direction, and installing two CCD (17) at the two stations at the back, wherein the operation steps are the same as the first step and the second step.
10. The method for splicing the large focal plane CCD as claimed in claim 8, wherein the CCD guide lifting installation pull rod linkage mechanisms are provided with one group and are arranged above the station in front of the left side; the lifting installation pull rod linkage mechanism completes the installation of a CCD (17) of a station in front of the left side according to the first step and the second step;
then, the locking of the front and rear station translation positioning mechanisms on the hanging platform (5) is released; transversely moving the hanging platform (5) to the position above the station at the rear of the left side, and mounting the CCD (17) of the station at the rear of the left side, wherein the operation steps are the same as the first step and the second step;
the CCD guide lifting installation pull rod linkage mechanism is shifted to a station behind the right side from left to right, the CCD (17) of the station behind the right side is installed, and the operation steps are the same as the first step and the second step;
then, the locking of the front and rear station translation positioning mechanisms on the hanging platform (5) is released; and (3) transversely moving the hanging platform (5) to the position above the station in front of the right side, and installing the CCD (17) of the station in front of the right side, wherein the operation steps are the same as the first step and the second step.
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| CN201911113500.5A CN110785077B (en) | 2019-11-14 | 2019-11-14 | Device and method for large focal plane CCD (charge coupled device) splicing |
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| CN113804626A (en) * | 2021-10-12 | 2021-12-17 | 安徽像元光测科技有限公司 | Scientific-grade CCD high-precision splicing installation protection device and method |
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