CCD camera

Abstract

The invention discloses a CCD (Charge Coupled Device) camera, which solves the problem of moisture condensation and reliably reduces the refrigeration temperature, so that the CCD camera works in a lower noise background environment, the noise of an image signal is small, and the sensitivity is improved. The invention relates to a lens connecting seat, which comprises a connecting seat body, which comprises a profiling seat body and a connecting plate, the connecting plate is arranged at the upper part of the profiling seat body, the periphery of the connecting plate is arranged in a convex manner, the central position of the connecting seat body is provided with a central lens avoiding notch hole, and the connecting plate is provided with a connecting positioning hole; the shell comprises peripheral plates on the periphery and a convex lens positioning cavity, and the peripheral plates on the periphery are combined to form a mounting cavity; the heat dissipation seat body comprises a bottom heat dissipation seat body and a convex contact heat dissipation block, and the center position of the upper surface of the bottom heat dissipation seat body protrudes forwards to form the convex contact heat dissipation block; a PCB assembly; a TEC refrigeration sheet; a CCD module; and a lens.

Description

Technical Field

[0001] The invention relates to the technical field of die-cutting equipment, in particular to a CCD camera. Background Art

[0002] The CCD sensor generates heat when working, thereby reducing dark current noise, achieving a higher signal-to-noise ratio and sensitivity, so that clear and accurate imaging can still be achieved under low light conditions.

[0003] The signal-to-noise ratio of a camera is generally calculated using the following formula:

[0004] The larger the dark current is, the larger the corresponding dark current noise will be, which will reduce the signal-to-noise ratio, thereby causing the image signal to have larger noise and lower sensitivity.

[0005] In deep space photography, the camera needs to work under long exposure under low illumination. The longer the working time, the greater the dark current noise will be, which will cause the image signal noise to increase and the sensitivity to decrease. Therefore, during the operation of CCD cameras, it is necessary to reduce the dark current. Generally speaking, the dark current changes with temperature. For every 5-7℃ decrease in temperature, the dark current is reduced to half of the original. Therefore, it is urgent to develop a corresponding cooling structure for CCD cameras. However, in actual use, there are generally water cooling and air cooling methods for cooling. The water cooling effect is better than air cooling, but it is easy to produce condensation. Therefore, in order to solve the condensation problem, it is urgent to develop a CCD camera with reliable cooling and no condensation. Summary of the invention

[0006] In view of the above problems, the present invention provides a CCD camera, which solves the condensation problem and reliably reduces the cooling temperature, so that the CCD camera works in a lower noise background environment, ensuring that the image signal has low noise and improved sensitivity.

[0007] A CCD camera, characterized in that it comprises:

[0008] The connecting seat body comprises a contoured seat body and a connecting plate, wherein the connecting plate is located at the upper part of the contoured seat body and is convexly arranged on all sides, a central lens avoidance hole is arranged at the central position of the connecting seat body, and a connecting positioning hole is arranged on the connecting plate;

[0009] The housing comprises peripheral panels on all sides and a convex lens positioning cavity, wherein the peripheral panels on all sides are combined to form a mounting cavity;

[0010] The heat sink body comprises a bottom heat sink body and a convex contact heat sink block, wherein the center position of the upper surface of the base heat sink body is convex forward to form a convex contact heat sink block;

[0011] PCB assembly;

[0012] TEC cooling chip;

[0013] CCD module;

[0014] and lenses;

[0015] The hot surface of the TEC cooling sheet is in contact with the exposed surface of the protruding contact heat sink, the cooling surface of the TEC cooling sheet is arranged in close contact with the lower surface of the CCD module, the bottom cover of the shell is installed on the bottom of the heat sink body and the outer periphery of the upper surface of the heat sink body, and is tightly connected, the lens is arranged in the convex lens positioning cavity of the shell, the connecting seat cover is installed in the upper position of the shell, the bottom of the contoured seat is in close contact with the upper surface of the peripheral plate around, and is sealed and connected, and the central lens avoidance hole is arranged corresponding to the convex lens positioning cavity;

[0016] The raised contact heat sink, PCB assembly, TEC cooling sheet, and CCD module are all located in the installation cavity. An air inlet and an air outlet are provided on the peripheral plates around the shell. Dry inert gas is filled into the installation cavity through the air inlet, and the inert gas is discharged from the installation cavity through the air outlet.

[0017] It is further characterized by:

[0018] The peripheral plates are provided with through connection holes at the height positions corresponding to the TEC cooling sheets. The TEC cooling sheets are provided with connecting wires through the through connection holes. The connecting wires are externally connected to the cooling control board. The cooling control board is arranged outside the installation cavity to reduce the heat of the installation cavity and the space of the installation cavity, so that the entire CCD camera can be as small as possible.

[0019] The PCB assembly includes a first PCB board and a second PCB board. The first PCB board and the second PCB board are both central notch structures. The first PCB board and the second PCB board are connected by pillars around to form a three-dimensional double-layer arrangement structure. The first PCB board and the second PCB board are both mounted on the outer periphery of the protruding contact heat sink, so that the layout of the entire installation cavity is compact.

[0020] The first PCB board is located in the upper layer, and the second PCB board is located in the lower layer. The first PCB board is provided with two rows of upward convex pins, and the upward convex pins are used to correspond to the corresponding side connection areas of the CCD module. The first PCB board is also provided with threaded connection holes. The bottom side convexities of a pair of side edges of the CCD module form a connecting bottom plate. The connecting bottom plate is provided with a U-shaped connecting groove. The external connecting bolts are fixedly connected to the U-shaped connecting groove and the corresponding threaded connection holes, so that the PCB assembly and the CCD module are reliably connected;

[0021] The peripheral boards are also provided with signal output interfaces, the height and position of the signal output interfaces correspond to the corresponding port positions of the PCB components, and the signal output interfaces are sealed;

[0022] The air inlet and the air outlet are arranged on different peripheral plates to ensure that the dry inert gas quickly fills the entire installation cavity;

[0023] The outer periphery of the bottom of the shell is provided with a lower convex stopper, the outer periphery of the upper surface of the heat dissipation seat is provided with a notch groove, the lower convex stopper alignment cover is installed in the notch groove, and the lower surface of the bottom of the shell and the fitting surface of the heat dissipation seat are provided with a sealing ring to ensure fast and reliable assembly and reliable sealing;

[0024] A stop step ring is provided at the bottom of the convex lens positioning cavity, and the lens is positioned and installed in the stop step ring.

[0025] After adopting the structure of the present invention, the heat dissipation bottom of the CCD module is directly connected to the cold surface of the TEC cooling plate. When the CCD module is working, the TEC cooling plate also works at the same time. The cooling surface of the TEC is attached to the heating surface of the CCD module, and the hot surface of the TEC is close to the exposed surface of the raised contact heat sink. The raised contact heat sink and the bottom heat sink body are an integrated part. Heat is dissipated through the exposed surface area of ​​the bottom heat sink body to perform sufficient heat exchange. At the same time, the entire device works in a closed installation cavity. Dry inert gas is introduced through the air inlet to fill the working surface of the CCD module and the remaining heating surfaces inside, achieving a sub-vacuum environment. When the cooling temperature reaches ≤-40°C, condensation will not form on the surface of the CCD module, so that the working temperature of the CCD camera can be reduced to -45°C or even lower. It solves the condensation problem and reliably reduces the cooling temperature, so that the CCD camera works in a lower noise background environment, ensuring that the image signal has low noise and improved sensitivity. BRIEF DESCRIPTION OF THE DRAWINGS

[0026] Figure 1 It is a schematic diagram of the three-dimensional structure of the present invention;

[0027] Figure 2 It is a schematic diagram of the cross-sectional structure of the front view of the present invention;

[0028] Figure 3 is a three-dimensional schematic diagram of a housing of the present invention;

[0029] Figure 4 This is a three-dimensional diagram of the assembly of the heat sink body, PCB assembly, TEC cooling sheet, and CCD module of the present invention; the names corresponding to the serial numbers in the figure are as follows:

[0030] The invention comprises a connecting seat body 10, a contoured seat body 11, a connecting plate 12, a central lens avoidance hole 13, a connecting positioning hole 14, a shell 20, an outer plate 21, a convex lens positioning cavity 22, a stop step ring 221, and the surrounding outer plates 21 are combined to form an installation cavity 23, an air inlet hole 24, an air outlet hole 25, a through-connecting hole 26, a signal output interface 27, a lower convex stopper 28, a sealing ring 29, a heat dissipation seat body 30, a bottom heat dissipation seat body 31, a notch groove 311, a convex contact heat dissipation block 32, an SPC connector 33, a PCB assembly 40, a first PCB board 41, an upper convex pin 411, a threaded connection hole 412, a second PCB board 42, a connecting column 43, a TEC cooling sheet 50, a CCD module 60, a connecting bottom plate 61, a U-shaped connecting groove 62, and a lens 70. DETAILED DESCRIPTION

[0031] A CCD camera, see Figure 1-Figure 4 : It includes a connecting seat 10, a shell 20, a heat dissipation seat 30, a PCB assembly 40, a TEC cooling sheet 50, a CCD module 60, and a lens 70;

[0032] The connecting seat body 10 includes a contoured seat body 11 and a connecting plate 12. The connecting plate 12 is located at the upper part of the contoured seat body 11 and is convexly arranged on all sides. A central lens avoidance hole 13 is arranged at the center of the connecting seat body 10. A connecting positioning hole 14 is arranged on the connecting plate 12. The connecting positioning hole 14 is used for positioning assembly of the entire CCD camera.

[0033] The housing 20 includes peripheral panels 21 and a convex lens positioning cavity 22, and the peripheral panels 21 are combined to form a mounting cavity 23;

[0034] The heat sink body 30 includes a bottom heat sink body 31 and a protruding contact heat sink block 32. The center of the upper surface of the base heat sink body 31 is convex to form a protruding contact heat sink block 32. The heat sink body 30 also has a built-in connection line and an external SPC connector 33, which is used for arranging the circuit and signal connection lines of the PCB board assembly 40. In specific implementation, the heat sink body 30 is made of aluminum to ensure reliable heat dissipation performance.

[0035] The TEC cooling sheet 50 includes a cooling surface and a heating surface;

[0036] The hot surface of the TEC cooling sheet 50 is in contact with the exposed surface of the convex contact heat sink 32, and the cooling surface of the TEC cooling sheet 50 is arranged in close contact with the lower heating surface of the CCD module 60. The bottom cover of the housing 20 is mounted on the outer periphery of the upper surface of the bottom heat sink 31 of the heat sink 30 and is tightly connected. The lens 70 is arranged in the convex lens positioning cavity 22 of the housing 20. The connecting seat 10 is covered at the upper position of the housing 20. The bottom of the contoured seat 11 is in close contact with the upper surface of the surrounding peripheral plates 21 and is sealed and connected. The central lens avoidance hole 13 is arranged corresponding to the convex lens positioning cavity 22.

[0037] The raised contact heat sink 31, the PCB assembly 40, the TEC cooling sheet 50, and the CCD module 60 are all located in the installation cavity 23. An air inlet 24 and an air outlet 25 are provided on the peripheral plate 21 around the shell 20. Dry inert gas is filled into the installation cavity 23 through the air inlet 24, and the inert gas is discharged from the installation cavity 23 through the air outlet 25.

[0038] In a specific embodiment, the surrounding outer plates 21 are also provided with through connection holes 26 at height positions corresponding to the TEC cooling plate 50. The TEC cooling plate 50 is provided with connecting wires (and sealed) through the through connection holes 26. The connecting wires are externally connected to a cooling control board. The cooling control board is arranged outside the mounting cavity 23 to reduce the heat of the mounting cavity 23 and the space of the mounting cavity 23, so that the entire CCD camera can be as small as possible.

[0039] In a specific embodiment, the PCB assembly 40 includes a first PCB board 41 and a second PCB board 42. The first PCB board 41 and the second PCB board 42 are both central notch structures. The first PCB board 41 and the second PCB board 42 are connected by pillars 43 around them to form a three-dimensional double-layer arrangement structure. The first PCB board 41 and the second PCB board 42 are both mounted on the outer periphery of the protruding contact heat sink 32, so that the layout of the entire installation cavity 23 is compact.

[0040] The first PCB board 41 is located in the upper layer and the second PCB board 42 is located in the lower layer. The first PCB board 41 is provided with two rows of upward convex pins 411. The upper convex pins 411 are used to correspond to the corresponding side connection areas of the CCD module 60. The first PCB board 41 is also provided with threaded connection holes 412. The bottom side protrusions of a pair of side edges of the CCD module 60 form a connecting base plate 61. The connecting base plate 61 is provided with a U-shaped connecting groove 62. The external connecting bolts fix the U-shaped connecting groove 62 and the corresponding threaded connection hole 412, so that the PCB assembly 40 and the CCD module 60 are reliably connected.

[0041] In a specific implementation, a signal output interface 27 is also provided on a peripheral board 21, the height and position of the signal output interface 27 correspond to the corresponding port position arrangement of the PCB assembly 40, and the signal output interface 27 is sealed;

[0042] The air inlet 24 and the air outlet 25 are arranged on different peripheral plates 21 to ensure that the dry inert gas quickly fills the entire installation cavity 23 .

[0043] In specific implementation, a lower convex stopper 28 is provided on the outer periphery of the bottom of the housing 20, and a notch groove 311 is provided on the outer periphery of the upper surface of the heat dissipation seat 31. The lower convex stopper 28 is aligned and covered in the notch groove 311. A sealing ring 29 is provided on the lower surface of the bottom of the housing 20 and the fitting surface of the heat dissipation seat 31 to ensure fast and reliable assembly and reliable sealing.

[0044] A stop step ring 221 is provided at the bottom of the convex lens positioning cavity 22 , and the lens 70 is positioned and installed in the stop step ring 221 .

[0045] Its working principle is as follows: the heat dissipation bottom of the CCD module is directly connected to the cold surface of the TEC cooling plate. When the CCD module is working, the TEC cooling plate also works at the same time. The cooling surface of the TEC is attached to the heating surface of the CCD module, and the hot surface of the TEC is close to the exposed surface of the raised contact heat sink. The raised contact heat sink and the bottom heat sink body are an integrated part. Heat is dissipated through the exposed surface area of ​​the bottom heat sink body to carry out sufficient heat exchange. At the same time, the entire device works in a closed installation cavity, and dry inert gas is introduced through the air inlet to fill the working surface of the CCD module and the remaining heating surfaces inside, achieving a sub-vacuum environment. When the cooling temperature reaches ≤-40℃, condensation will not form on the surface of the CCD module, thereby reducing the operating temperature of the CCD camera to -45℃ or even lower. It solves the condensation problem and reliably reduces the cooling temperature, so that the CCD camera works in a lower noise background environment, ensuring that the image signal has low noise and improved sensitivity.

[0046] It will be apparent to those skilled in the art that the invention is not limited to the details of the exemplary embodiments described above and that the invention can be implemented in other specific forms without departing from the spirit or essential features of the invention. Therefore, the embodiments should be considered exemplary and non-limiting in all respects, and the scope of the invention is defined by the appended claims rather than the foregoing description, and it is intended that all variations falling within the meaning and scope of the equivalent elements of the claims be included in the invention. Any reference numeral in a claim should not be considered as limiting the claim to which it relates.

[0047] In addition, it should be understood that although the present specification is described according to implementation modes, not every implementation mode contains only one independent technical solution. This description of the specification is only for the sake of clarity. Those skilled in the art should regard the specification as a whole. The technical solutions in each embodiment may also be appropriately combined to form other implementation modes that can be understood by those skilled in the art.

Claims

1. A CCD camera, characterized in that: It includes: The connecting seat body comprises a contoured seat body and a connecting plate, wherein the connecting plate is located at the upper part of the contoured seat body and is convexly arranged on all sides, a central lens avoidance hole is arranged at the central position of the connecting seat body, and a connecting positioning hole is arranged on the connecting plate; The housing comprises peripheral panels on all sides and a convex lens positioning cavity, wherein the peripheral panels on all sides are combined to form a mounting cavity; The heat sink body comprises a bottom heat sink body and a convex contact heat sink block, wherein the center position of the upper surface of the base heat sink body is convex forward to form a convex contact heat sink block; PCB assembly; TEC cooling chip; CCD module; and lenses; The hot surface of the TEC cooling sheet is in contact with the exposed surface of the protruding contact heat sink, the cooling surface of the TEC cooling sheet is arranged in close contact with the lower surface of the CCD module, the bottom cover of the shell is installed on the bottom of the heat sink body and the outer periphery of the upper surface of the heat sink body, and is tightly connected, the lens is arranged in the convex lens positioning cavity of the shell, the connecting seat cover is installed in the upper position of the shell, the bottom of the contoured seat is in close contact with the upper surface of the peripheral plate around, and is sealed and connected, and the central lens avoidance hole is arranged corresponding to the convex lens positioning cavity; The raised contact heat sink, PCB assembly, TEC cooling sheet, and CCD module are all located in the installation cavity. An air inlet and an air outlet are provided on the peripheral plates around the shell. Dry inert gas is filled into the installation cavity through the air inlet, and the inert gas is discharged from the installation cavity through the air outlet.

2. A CCD camera according to claim 1, characterized in that: The peripheral plates are also provided with through connection holes at height positions corresponding to the TEC refrigeration plates. The TEC refrigeration plates are provided with connecting wires through the through connection holes. The connecting wires are externally connected to a refrigeration control board. The refrigeration control board is arranged outside the installation cavity.

3. A CCD camera according to claim 1, characterized in that: The PCB assembly includes a first PCB board and a second PCB board. The first PCB board and the second PCB board both have a central notch structure. The first PCB board and the second PCB board are connected by pillars on all sides to form a three-dimensional double-layer arrangement structure. The first PCB board and the second PCB board are both mounted on the periphery of the raised contact heat sink.

4. A CCD camera according to claim 3, characterized in that: The first PCB board is located in the upper layer and the second PCB board is located in the lower layer. The first PCB board is provided with two rows of upward convex pins, and the upward convex pins are used to correspond to the corresponding side connection areas of the CCD module. The first PCB board is also provided with threaded connection holes. The bottom side protrusions of a pair of side edges of the CCD module form a connecting bottom plate. The connecting bottom plate is provided with a U-shaped connecting groove, and the external connecting bolts are fixed to the U-shaped connecting groove and the corresponding threaded connection hole.

5. A CCD camera according to claim 1, characterized in that: Signal output interfaces are also arranged on the peripheral boards around the periphery. The height and position of the signal output interfaces correspond to the corresponding port positions of the PCB components, and the signal output interfaces are sealed.

6. A CCD camera according to claim 1, characterized in that: The air inlet and the air outlet are arranged on different peripheral plates.

7. A CCD camera according to claim 1, characterized in that: A lower convex stopper is arranged at the outer periphery of the bottom of the shell, a notch groove is arranged at the outer periphery of the upper surface of the heat dissipation seat, the lower convex stopper alignment cover is installed in the notch groove, and a sealing ring is arranged at the lower surface of the bottom of the shell and the fitting surface of the heat dissipation seat.

8. A CCD camera according to claim 1, characterized in that: A stop step ring is provided at the bottom of the convex lens positioning cavity, and the lens is positioned and installed in the stop step ring.

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