Night sky bright star instantaneous image acquisition device and starry sky viewing suitability determination system

Abstract

The utility model discloses a night sky bright star instantaneous image acquisition device and a starry sky viewing suitability determination system. The night-sky bright star instantaneous image acquisition device comprises a telephoto lens and a CMOS image sensor for bright star instantaneous image acquisition, the CMOS image sensor for bright star instantaneous image acquisition is arranged in a CMOS photosensitive chip box, the CMOS photosensitive chip box is fixed at one end of the telephoto lens, the CMOS image sensor for bright star instantaneous image acquisition and the telephoto lens are coaxially arranged, and the CMOS photosensitive chip box is fixed at the other end of the telephoto lens. The telephoto lens and the CMOS photosensitive chip box which are connected into a whole are installed on the lens azimuth control assembly, and the telephoto lens can face a pre-shot target bright star under the control of the lens azimuth control assembly. The night daylight star instantaneous image acquisition device can provide reliable night daylight star instantaneous images for star sky viewing suitability judgment, and is low in cost and suitable for popularization.

Description

Technical Field

[0001] The utility model relates to a night sky bright star instantaneous image acquisition device and a starry sky viewing suitability determination system based on the night sky bright star instantaneous image acquisition device. Background Art

[0002] In recent years, with the improvement of living standards, people have paid more and more attention to starry sky tourism, and enjoying the brilliant stars outdoors has become a trend. Starry sky viewing is closely related to factors such as cloud cover, atmospheric stability, atmospheric transparency and light pollution. At present, when people watch the starry sky, they mostly judge whether it is suitable to travel and watch the starry sky based on the meteorological conditions reported by the weather forecast, which is very uncertain. In addition, there are some professionals and departments who usually use some observation equipment to assist in judging whether it is suitable to watch the starry sky, such as using all-sky imagers or cloud cover monitors to obtain cloud cover, using night sky light monitors to obtain light pollution, using visibility observation instruments to obtain atmospheric transparency, using professional cameras for shooting or professional seeing observation instruments to obtain atmospheric seeing (representing atmospheric stability), etc. However, it can be found from actual implementation that the judgments made based on the above-mentioned observation equipment are often inconsistent with the actual situation of the starry sky, and cannot meet people's starry sky viewing needs well. The reason is that there are inappropriate uses of the above-mentioned observation equipment. For example, the horizontal visibility obtained by the visibility observation instrument cannot fully represent the atmospheric transparency in the vertical direction, which has limitations. In addition, the above-mentioned observation equipment is expensive and difficult to popularize. Utility Model Content

[0003] The utility model aims to provide a device for collecting instantaneous images of bright stars at night and a system for determining the suitability of starry sky viewing. The device for collecting instantaneous images of bright stars at night can provide reliable instantaneous images of bright stars at night for determining the suitability of starry sky viewing.

[0004] In order to achieve the above purpose, the utility model adopts the following technical solutions:

[0005] A device for capturing instantaneous images of bright stars in the night sky comprises a telephoto lens and a CMOS image sensor for capturing instantaneous images of bright stars, wherein the CMOS image sensor for capturing instantaneous images of bright stars is arranged in a CMOS photosensitive chip box, the CMOS photosensitive chip box is fixed at one end of the telephoto lens, the CMOS image sensor for capturing instantaneous images of bright stars is coaxially arranged with the telephoto lens, wherein the telephoto lens and the CMOS photosensitive chip box connected as one are mounted on a lens position control component, and the telephoto lens can be directed toward a pre-photographed target bright star under the control of the lens position control component.

[0006] A starry sky viewing suitability determination system comprises a night sky starry sky image acquisition device and a night sky bright star instantaneous image acquisition device, wherein the night sky starry sky image acquisition device and the night sky bright star instantaneous image acquisition device are connected to a control device, and the night sky starry sky image acquisition device, the night sky bright star instantaneous image acquisition device and the control device are connected to a power supply, wherein the power supply supplies power to the control device, and the power supply supplies power to the night sky starry sky image acquisition device and the night sky bright star instantaneous image acquisition device under the control of the control device.

[0007] The advantages of the utility model are:

[0008] The instantaneous image acquisition device of bright stars at night can capture and acquire instantaneous images of bright stars at night for obtaining the atmospheric seeing level. The atmospheric seeing level obtained based on the instantaneous images of bright stars at night can fully reflect the atmospheric stability. The instantaneous image acquisition device of bright stars at night and the night sky image acquisition device form the present invention's starry sky viewing suitability determination system, which is used for determining the suitability of starry sky viewing. The determination result is reliable and close to the actual situation, providing a reference for people's starry sky viewing travel plans, and improving people's experience when viewing the starry sky. In addition, the present invention has low cost and is suitable for popularization and promotion. BRIEF DESCRIPTION OF THE DRAWINGS

[0009] Figure 1 It is a structural schematic diagram of the first embodiment of the utility model of the instantaneous image acquisition device of bright stars in the night sky.

[0010] Figure 2 It is a structural schematic diagram of the second embodiment of the instantaneous image acquisition device of bright stars in the night sky of the utility model.

[0011] Figure 3 It is a side view schematic diagram of the second embodiment of the instantaneous image acquisition device of bright stars in the night sky of the utility model.

[0012] Figure 4 It is a schematic diagram of the composition of the starry sky viewing suitability determination system of the utility model.

[0013] Figure 5 It is a schematic diagram of the structure of a night sky starry sky image acquisition device. DETAILED DESCRIPTION

[0014] like Figures 1 to 5As shown, the instantaneous image acquisition device 20 of bright stars in the night sky of the utility model is used for photographing and collecting instantaneous images of bright stars in the night sky, which includes a telephoto lens 21 and a CMOS image sensor for instantaneous image acquisition of bright stars (not shown in the figure), the CMOS image sensor for instantaneous image acquisition of bright stars is arranged in a CMOS photosensitive chip box 22, the CMOS photosensitive chip box 22 is fixed to one end of the telephoto lens 21, the CMOS image sensor for instantaneous image acquisition of bright stars in the CMOS photosensitive chip box 22 is coaxially arranged with the telephoto lens 21, wherein the telephoto lens 21 and the CMOS photosensitive chip box 22 connected as one are installed on a lens orientation control component, and the telephoto lens 21 can be directed toward the pre-photographed target bright star under the control of the lens orientation control component.

[0015] In actual design, there are two schemes for designing the lens position control component, depending on the location of the viewing location, which are described in detail below.

[0016] When the viewing location is in an area where the North Star is visible in the night sky, Figure 1 As shown, the lens azimuth control assembly includes a lens fixing plate 52 and a lens fixing sleeve 51. The lens fixing plate 52 is vertically arranged on one side of the substrate 50. The lens fixing sleeve 51 is sleeved on one end of the telephoto lens 21. The lens fixing sleeve 51 can move along an arc-shaped azimuth adjustment groove 53 provided on the lens fixing plate 52 via a positioning member (not shown in the figure). The CMOS photosensitive chip box 22 at the other end of the telephoto lens 21 is rotatably mounted on the lens fixing plate 52 via a rotating shaft (not shown in the figure). The groove edge of the azimuth adjustment groove 53 is provided with an elevation scale line. Driven by the positioning member, the telephoto lens 21 can be rotated toward the North Star (the target bright star for pre-shooting).

[0017] In actual design, the positioning parts can be implemented using bolts. In addition, preferably, the rotating shaft connected to the CMOS photosensitive chip box 22 is provided on the lens fixing plate 52 via a bearing (not shown in the figure). Usually, the rotating shaft is fixed to the inner ring of the bearing, and the outer ring of the bearing is fixed to the lens fixing plate 52.

[0018] When the viewing location is in an area where the North Star is not visible at night, Figure 2 and Figure 3As shown, the lens orientation control assembly includes a flat cylindrical base 60 and a lens fixing kit 61. A horizontal orientation drive motor 69 is provided in the base 60. A horizontal orientation plate 68 is provided at the top of the base 60. The horizontal orientation plate 68 can rotate in a horizontal plane under the drive of the horizontal orientation drive motor 69. A pair of L-shaped support plates 63 are fixed on the horizontal orientation plate 68. The lens fixing kit 61 is sleeved on one end of the telephoto lens 21. The lens fixing kit 61 and the CMOS photosensitive chip box 22 fixed on the other end of the telephoto lens 21 are as a whole. The two sides of the whole are divided into A rotating plate 62 is fixed to each of the rotating plates 62, and each rotating plate 62 is rotatably mounted on a corresponding L-shaped support plate 63 via a rotating shaft 67. The rotating plate 62 mounted on one of the L-shaped support plates 63 is connected to an elevation drive motor 65. The telephoto lens 21 equipped with a lens fixing kit 61 and a CMOS photosensitive chip box 22 is located between the two L-shaped support plates 63 and can rotate in a vertical plane under the drive of the elevation drive motor 65. The telephoto lens 21 can be driven by the horizontal azimuth drive motor 69 and the elevation drive motor 65 to face the pre-photographed target bright star.

[0019] In the actual design, the horizontal azimuth plate 68 is connected to the horizontal azimuth drive motor 69 through the first gear assembly. Specifically, the first gear assembly includes a power gear 691 and a passive gear 692. The power gear 691 is connected to the output shaft of the horizontal azimuth drive motor 69, and the passive gear 692 is fixed to the bottom surface of the horizontal azimuth plate 68 by fixing bolts. Usually, the passive gear 692 is annular. During actual operation, the horizontal azimuth drive motor 69 drives the power gear 691 to rotate, so that the power gear 691 drives the passive gear 692 to rotate, and then the passive gear 692 drives the horizontal azimuth plate 68 to rotate, thereby completing the horizontal azimuth adjustment of the telephoto lens 21.

[0020] Preferably, if Figure 3 , the horizontal azimuth plate 68 is supported by a support column 690, which is disposed in the base 60. The top of the support column 690 passes through a passive gear 692 and is rotatably connected to the horizontal azimuth plate 68. In actual implementation, the support column 690 can be connected to the horizontal azimuth plate 68 through a bearing (not shown in the figure). Usually, the inner ring of the bearing is fixed to the horizontal azimuth plate 68, and the outer ring of the bearing is fixed to the support column 690.

[0021] Preferably, if Figure 2 A horizontal azimuth scale line 602 is provided on the circumferential edge of the top of the base 60, and a reference line 601 is correspondingly provided on the horizontal azimuth plate 68. Therefore, when the horizontal azimuth plate 68 rotates, by checking the position of the reference line 601 relative to the horizontal azimuth scale line 602, the rotation angle of the horizontal azimuth plate 68 on the horizontal plane, or the horizontal position of the telephoto lens 21 at this time, can be determined.

[0022] Similarly, in an actual design, one of the rotating plates 62 is connected to the elevation drive motor 65 through a second gear assembly. Specifically, the second gear assembly includes a main gear 651 and a sub-gear 652. The main gear 651 is connected to the output shaft of the elevation drive motor 65, and the sub-gear 652 is fixed on the rotating plate 62 and coaxially arranged with the rotating shaft 67 fixed on the rotating plate 62. During actual operation, the elevation drive motor 65 drives the main gear 651 to rotate, thereby the main gear 651 drives the sub-gear 652 to rotate, and then the sub-gear 652 drives the rotating plate 62 to rotate, thereby completing the elevation adjustment of the telephoto lens 21.

[0023] Preferably, if Figure 2 An elevation pointer 64 is provided on the portion of the rotating shaft 67 connected to the rotating plate 62 that extends out of the L-shaped supporting plate 63, and an elevation scale line 66 is provided on the outer side of the L-shaped supporting plate 63. Therefore, when the rotating plate 62 rotates, the elevation angle of the rotating plate 62 or the telephoto lens 21 at this time can be determined by checking the position of the elevation pointer 64 relative to the elevation scale line 66.

[0024] In actual design, preferably, the rotating shaft 67 is disposed on the L-shaped support plate 63 via a bearing (not shown in the figure). Usually, the rotating shaft 67 is fixed to the inner ring of the bearing, and the outer ring of the bearing is fixed to the L-shaped support plate 63.

[0025] Of course, in addition to the first gear assembly and the second gear assembly mentioned above, other forms of transmission assemblies can also be used to achieve drive without limitation.

[0026] When the viewing location is in an area where the North Star is visible in the night sky, in actual use, in order to make the telephoto lens 21 face the North Star, firstly, the substrate 50 is placed facing the due north, that is, the telephoto lens 21 is facing the due north, and then the geographical latitude of the viewing location is measured, and then the elevation angle of the telephoto lens 21 and the CMOS photosensitive chip box 22 is adjusted along the azimuth adjustment groove 53 through the positioning member (bolt) to position them at the elevation scale line corresponding to the measured geographical latitude. At this time, the angle between the telephoto lens 21 and the horizontal plane is the geographical latitude of the viewing location, so the telephoto lens 21 will face the North Star. In the actual shooting process, the azimuth and elevation of the telephoto lens 21 do not need to be adjusted again.

[0027] When the viewing location is in an area where the North Star is not visible in the night sky, in actual use, in order to accurately control the azimuth of the telephoto lens 21, the lens azimuth control assembly is first set to face the due north direction, that is, the reference line 601 on the horizontal azimuth plate 68 is set to face the due north direction. The initial horizontal azimuth of the telephoto lens 21 is due north, and the elevation angle is 90°. Then, according to the target bright star instruction and based on the azimuth of the target bright star obtained through the current actual star map, the control device 30 controls the horizontal azimuth drive motor 69 and the elevation drive motor 65 to make the telephoto lens 21 face the target bright star.

[0028] During shooting, when the control device 30 receives a shooting instruction, the control device 30 controls the power supply 70 to supply power to the CMOS image sensor used for capturing instantaneous images of bright stars, thereby capturing a plurality of instantaneous images of bright stars in the night sky in a short period of time, and sending the captured instantaneous images of bright stars in the night sky to the control device 30, which performs relevant processing to obtain the atmospheric seeing level.

[0029] In the present invention, the image of the night sky is a panoramic image, which refers to an image that conforms to the normal effective viewing angle of human eyes (approximately 90 degrees horizontally and 70 degrees vertically) or includes the peripheral vision viewing angle of both eyes (approximately 180 degrees horizontally and 90 degrees vertically), or even an image captured in a 360-degree complete scene range.

[0030] In the present invention, the target bright star refers to a pre-photographed bright star, and the photo is usually taken for a bright star. Further, the bright star in the present invention refers to a star with an apparent magnitude value less than 2.0 and greater than -1.5. The bright star is set with reference to the bright star list given by astronomy.

[0031] like Figure 4 As shown, the utility model also proposes a starry sky viewing suitability determination system, including a night sky starry sky image acquisition device 10 and the above-mentioned night sky bright star instantaneous image acquisition device 20 of the utility model, the night sky starry sky image acquisition device 10 and the night sky bright star instantaneous image acquisition device 20 of the utility model are connected to a control device 30, the night sky starry sky image acquisition device 10, the night sky bright star instantaneous image acquisition device 20 of the utility model and the control device 30 are connected to a power supply 70, wherein, in addition to supplying power to the control device 30, the power supply 70 supplies power to the night sky starry sky image acquisition device 10 and the night sky bright star instantaneous image acquisition device 20 of the utility model in a timely manner under the control of the control device 30.

[0032] like Figure 5 The night sky star image acquisition device 10 is used to capture and acquire the night sky star image, which includes a fisheye lens 11 and a CMOS image sensor for star image acquisition (not shown in the figure). The CMOS image sensor for star image acquisition is arranged in a CMOS chip box 12. The fisheye lens 11 is installed on the top of the CMOS chip box 12, and the arc-shaped top of the fisheye lens 11 faces upward. The CMOS image sensor for star image acquisition in the CMOS chip box 12 is coaxially arranged with the fisheye lens 11.

[0033] In practical applications, preferably, the fisheye lens 11 uses a large-aperture fisheye lens, but of course there is no limitation. Here, in order to capture a clearer starry sky, the fisheye lens should have a larger effective aperture, such as a large-aperture fisheye lens with a front lens diameter of ≥16mm, a relative aperture greater than 2.0 (F number ≤2.0), a field of view angle of ≥170°, and a focal length of ≥3mm.

[0034] In order to facilitate the accuracy of image recognition and parameter extraction, the CMOS image sensors (also known as CMOS photosensitive chips) involved in the present invention are all low-illumination black-and-white high-definition CMOS image sensors. Low-illumination black-and-white high-definition CMOS image sensors refer to CMOS photosensitive chips with a minimum illumination of <0.00011ux and effective pixels ≥1920×1080approx, such as the IMX385 chip.

[0035] In actual design, Figure 5 The night sky star image acquisition device 10 also includes a sunshade component, which is used to block the fisheye lens 11 to protect the CMOS image sensor used for star image acquisition from being damaged by the fisheye lens 11 focusing sunlight during the day.

[0036] Specifically, if Figure 5 As shown, the sunshade assembly includes a base plate 18, on which a pair of L-shaped fixing plates 13 are fixed, a CMOS chip box 12 equipped with a fisheye lens 11 is fixed on the base plate 18 and is located between the two L-shaped fixing plates 13, a sunshade 19 is also arranged between the two L-shaped fixing plates 13, and both ends of the semicircular sunshade 19 are rotatably arranged on the two L-shaped fixing plates 13 via a flip rotation shaft 17, the flip rotation shaft 17 installed on one of the L-shaped fixing plates 13 is connected to a sunshade drive motor 14, and the sunshade drive motor 14 is installed on this L-shaped fixing plate 13. The sunshade 19 can be flipped by the flip rotation shaft 17 under the drive of the sunshade drive motor 14, thereby shielding the fisheye lens 11.

[0037] In the actual design, the flip rotating shaft 17 is connected to the sunshade drive motor 14 through the third gear assembly. Specifically, the third gear assembly includes a driving gear 15 and a driven gear 16. The driving gear 15 is connected to the output shaft of the sunshade drive motor 14, and the driven gear 16 is coaxially connected to the flip rotating shaft 17. During actual operation, the sunshade drive motor 14 drives the driving gear 15 to rotate, so that the driving gear 15 drives the driven gear 16 to rotate, and then the driven gear 16 drives the flip rotating shaft 17 to rotate, thereby completing the flipping control of the sunshade 19.

[0038] In actual design, preferably, the flip rotation shaft 17 is disposed on the L-shaped fixed plate 13 via a bearing (not shown in the figure). Usually, the flip rotation shaft 17 is fixed to the inner ring of the bearing, and the outer ring of the bearing is fixed to the L-shaped fixed plate 13.

[0039] Here, the driving motor involved in the above description is implemented by, for example, a stepping motor.

[0040] In actual use, since the focused sunlight during the daytime period can easily damage the high-precision CMOS image sensor, the night sky star image acquisition device 10 adopts a shielding method to prevent the sunlight from directly hitting the CMOS image sensor.

[0041] Specifically, when the sunset time of the day is reached, the control device 30 controls the sunshade drive motor 14 to rotate, so that the sunshade 19 flips to a set angle away from the fisheye lens 11 and no longer blocks the fisheye lens 11 for sky observation. Similarly, when the sunrise time (next day) is reached, the control device 30 controls the sunshade drive motor 14 to rotate in the opposite direction, so that the sunshade 19 flips in the opposite direction to a set angle above the fisheye lens 11, so that the fisheye lens 11 is blocked to prevent the CMOS image sensor from being damaged by sunlight.

[0042] During actual shooting, when the control device 30 receives a shooting instruction, the control device 30 controls the power supply 70 to supply power to the CMOS image sensor used for capturing starry sky images, thereby capturing a plurality of night sky starry sky images in a short period of time, and sending the captured night sky starry sky images to the control device 30, which performs relevant processing to obtain the night sky background brightness level and the number of visible stars.

[0043] Therefore, based on the obtained night sky background brightness level, the number of visible stars and the atmospheric seeing level, the control device 30 calculates the suitability of starry sky viewing in order to determine whether the viewing location is suitable for starry sky viewing.

[0044] In the present invention, the control device 30 is also used to exchange information with the central station server 40 .

[0045] In the present invention, the control device 30 is implemented by an electronic control device with information receiving and sending and information processing functions, such as a microprocessor, a single chip microcomputer, etc., without limitation. The control device 30 is mainly used to feed back relevant information to the central station server 40, control the operation of related devices (such as controlling the operation of the drive motor), and perform related processing. In practice, the central station server 40 can also send the above-mentioned shooting instructions and instructions for controlling the opening and closing of the sunshade assembly to the control device 30.

[0046] The utility model has the following beneficial effects:

[0047] The instantaneous image acquisition device of bright stars at night can capture and acquire instantaneous images of bright stars at night for obtaining the atmospheric seeing level. The atmospheric seeing level obtained based on the instantaneous images of bright stars at night can fully reflect the atmospheric stability. The instantaneous image acquisition device of bright stars at night and the night sky image acquisition device form the present invention's starry sky viewing suitability determination system, which is used to determine the suitability of starry sky viewing. The determination result is reliable and close to the actual situation, providing a reference for people's starry sky viewing travel plans, and improving people's experience when viewing the starry sky. In addition, the present invention has low cost and is suitable for popularization and promotion.

[0048] The above are preferred embodiments of the present invention and the technical principles used therein. For those skilled in the art, without departing from the spirit and scope of the present invention, any obvious changes such as equivalent transformation, simple replacement, etc. based on the technical solution of the present invention are within the protection scope of the present invention.

Claims

1. A device for collecting instantaneous images of bright stars at night, characterized in that: The invention comprises a telephoto lens and a CMOS image sensor for capturing instant images of bright stars, wherein the CMOS image sensor for capturing instant images of bright stars is arranged in a CMOS photosensitive chip box, and the CMOS photosensitive chip box is fixed at one end of the telephoto lens. The CMOS image sensor for capturing instant images of bright stars is coaxially arranged with the telephoto lens, wherein the telephoto lens and the CMOS photosensitive chip box connected as one are mounted on a lens position control component, and the telephoto lens can be directed toward a pre-photographed target bright star under the control of the lens position control component.

2. The instantaneous image acquisition device for bright stars at night as claimed in claim 1, characterized in that: The lens azimuth control assembly includes a lens fixing plate and a lens fixing sleeve, wherein the lens fixing plate is vertically arranged on one side of the substrate, and the lens fixing sleeve is sleeved on one end of the telephoto lens. The lens fixing sleeve can move along an arc-shaped azimuth adjustment groove provided on the lens fixing plate via a positioning piece, and the CMOS photosensitive chip box at the other end of the telephoto lens is rotatably mounted on the lens fixing plate via a rotating shaft. An elevation scale line is provided on the groove edge of the azimuth adjustment groove, and the telephoto lens can be rotated toward the target bright star for pre-shooting under the drive of the positioning piece.

3. The instantaneous image acquisition device of bright stars at night as claimed in claim 1, characterized in that: The lens orientation control assembly comprises a base and a lens fixing kit, wherein a horizontal orientation drive motor is arranged in the base, a horizontal orientation plate is arranged at the top of the base, the horizontal orientation plate can rotate in a horizontal plane under the drive of the horizontal orientation drive motor, a pair of L-shaped support plates are fixed on the horizontal orientation plate, the lens fixing kit is sleeved on one end of the telephoto lens, and a rotating plate is respectively fixed on both sides of the lens fixing kit and the CMOS photosensitive chip box fixed at the other end of the telephoto lens as a whole, each rotating plate is rotatably mounted on the corresponding L-shaped support plate via a rotating shaft, the rotating plate mounted on one of the L-shaped support plates is connected to the elevation drive motor, the telephoto lens on which the lens fixing kit and the CMOS photosensitive chip box are mounted is located between the two L-shaped support plates and can rotate in a vertical plane under the drive of the elevation drive motor, and the telephoto lens can face the pre-photographed target bright star driven by the horizontal orientation drive motor and the elevation drive motor.

4. The instantaneous image acquisition device of bright stars at night as claimed in claim 3, characterized in that: The horizontal azimuth plate is connected to the horizontal azimuth drive motor through a first gear assembly, wherein: the first gear assembly includes a power gear and a passive gear, the power gear is connected to the output shaft of the horizontal azimuth drive motor, and the passive gear is fixed on the bottom surface of the horizontal azimuth plate; the horizontal azimuth drive motor drives the power gear to rotate, the power gear drives the passive gear to rotate, and then the passive gear drives the horizontal azimuth plate to rotate, so as to achieve horizontal azimuth adjustment of the telephoto lens; A horizontal azimuth scale line is arranged on the circumferential edge of the top of the base, and a reference line is correspondingly arranged on the horizontal azimuth plate.

5. The instantaneous image acquisition device of bright stars at night as claimed in claim 3, characterized in that: One of the rotating plates is connected to the elevation drive motor through a second gear assembly, wherein: the second gear assembly includes a main gear and a sub-gear, the main gear is connected to the output shaft of the elevation drive motor, the sub-gear is fixed to the rotating plate and is coaxially arranged with the rotating shaft fixed to the rotating plate; the elevation drive motor drives the main gear to rotate, the main gear drives the sub-gear to rotate, and then the sub-gear drives the rotating plate to rotate, so as to achieve elevation adjustment of the telephoto lens; An elevation pointer is arranged on the portion of the rotating shaft connected to the rotating plate and extending out of the L-shaped supporting plate, and elevation scale lines are arranged on the outer side of the L-shaped supporting plate.

6. A starry sky viewing suitability determination system, comprising a night sky star image acquisition device and a night sky bright star instantaneous image acquisition device according to any one of claims 1 to 5, wherein the night sky star image acquisition device and the night sky bright star instantaneous image acquisition device are connected to a control device, and the night sky star image acquisition device, the night sky bright star instantaneous image acquisition device and the control device are connected to a power supply, wherein: The power supply supplies power to the control device, and under the control of the control device, the power supply supplies power to the night sky star image acquisition device and the night sky bright star instantaneous image acquisition device.

7. The starry sky viewing suitability determination system according to claim 6, characterized in that: The night sky starry sky image acquisition device includes a fisheye lens and a CMOS image sensor for starry sky image acquisition, the CMOS image sensor for starry sky image acquisition is arranged in a CMOS chip box, the fisheye lens is installed on the top of the CMOS chip box, and the CMOS image sensor for starry sky image acquisition is coaxially arranged with the fisheye lens.

8. The starry sky viewing suitability determination system according to claim 7, characterized in that: The CMOS image sensor for capturing instantaneous images of bright stars and the CMOS image sensor for capturing images of the starry sky are low-illumination black-and-white high-definition CMOS image sensors.

9. The starry sky viewing suitability determination system according to claim 7, characterized in that: The night sky star image acquisition device also includes a sunshade assembly, wherein: the sunshade assembly includes a base plate, a pair of L-shaped fixing plates are fixed on the base plate, the CMOS chip box on which the fisheye lens is installed is fixed on the base plate and is between the two L-shaped fixing plates, a sunshade is provided between the two L-shaped fixing plates, both ends of the sunshade are rotatably provided on the two L-shaped fixing plates via a flip rotating shaft, the flip rotating shaft installed on one of the L-shaped fixing plates is connected to a sunshade drive motor, the sunshade drive motor is installed on the L-shaped fixing plate, and the sunshade can be flipped by the flip rotating shaft under the drive of the sunshade drive motor to block the fisheye lens.

10. The starry sky viewing suitability determination system according to claim 9, characterized in that: The flip rotating shaft is connected to the sunshade drive motor through a third gear assembly, wherein: the third gear assembly includes a driving gear and a driven gear, the driving gear is connected to the output shaft of the sunshade drive motor, and the driven gear is coaxially connected to the flip rotating shaft; the sunshade drive motor drives the driving gear to rotate, the driving gear drives the driven gear to rotate, and then the driven gear drives the flip rotating shaft to rotate, so as to realize flip control of the sunshade.

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