An apparatus and method for laser imaging on a flexible photosensitive film

Abstract

The present invention discloses a device and method for laser imaging on a flexible photosensitive film. The device includes: a turntable, at least one laser light source module, a motor, a baffle, an air-floating channel, and a computer; the output shaft of the motor is connected to the turntable, at least one laser light source module is arranged in a row along the axis direction of the turntable on the circumferential side wall of the turntable, the baffle is arranged directly below the turntable, a through groove for the light path to pass through is arranged on the baffle, an air flow is sprayed in the air-floating channel, and the air flow suspends the flexible photosensitive film in the air-floating channel; the motor drives the turntable to rotate reciprocally along the axis, the laser light source module emits a laser beam, the laser beam passes through the through groove and exposes the flexible photosensitive film row by row, and transfers the image stored in the computer onto the flexible photosensitive film. The device and method solve the problem that the flexible photosensitive film is not easy to fix and expose due to its softness, and improve the exposure quality of the flexible photosensitive film.

Description

Technical Field

[0001] The present invention belongs to the field of laser imaging, and particularly relates to a device and method for laser imaging on a flexible photosensitive film. Background Art

[0002] Due to its light weight and paper-like shape, the flexible photosensitive film cannot be folded or bent excessively. Moreover, the flexible photosensitive film is coated with photosensitive ink. If the photosensitive ink comes into frictional contact with other objects, it is easy for the photosensitive ink to fall off the film, affecting the exposure quality. Therefore, to directly image on the flexible photosensitive film, the following problems need to be solved: how to prevent the flexible photosensitive film from coming into contact and collision with other objects during the exposure process, resulting in the peeling off of the photosensitive glue coating thereon. Summary of the Invention

[0003] The present invention provides a device and an imaging method for laser imaging on a flexible photosensitive film, aiming to solve the problem of poor exposure caused by the difficulty in fixing the flexible photosensitive film during laser imaging.

[0004] The solution of the present invention is as follows:

[0005] A device for laser imaging on a flexible photosensitive film includes: a turntable, at least one laser light source module, a motor, a baffle, an air-floating channel, and a computer;

[0006] The output shaft of the motor is connected to the turntable. At least one laser light source module is arranged in a row along the axis direction of the turntable on the circumferential side wall of the turntable. The baffle is arranged directly below the turntable, and a through groove for the light path to pass through is provided on the baffle.

[0007] An air flow is ejected into the air-floating channel, and the air flow suspends the flexible photosensitive film in the air-floating channel;

[0008] The motor drives the turntable to rotate reciprocally along the axis. At least one laser light source module emits at least one laser beam. At least one laser beam passes through the through groove and exposes the flexible photosensitive film row by row, transferring the image stored in the computer to the flexible photosensitive film.

[0009] Further, a convex upper mold with a smooth transition from gradually changing curved surfaces on both sides to a convex arc surface in the middle is provided at the lower end of the baffle. A number of first air intake through holes are evenly distributed on the baffle, and all the first air intake through holes lead directly to the convex upper mold. The air flow is ejected downward from the number of first air intake through holes onto the upper surface of the flexible photosensitive film;

[0010] A concave lower mold adapted to the convex upper mold is provided at the upper end of the base. A number of second air intake through holes corresponding one by one to the number of first air intake through holes are evenly distributed on the base, and all the second air intake through holes lead directly to the concave lower mold. The air flow is ejected upward from the number of second air intake through holes onto the lower surface of the flexible photosensitive film;

[0011] A plurality of downward jets of air and a plurality of upward jets of air cause the flexible photosensitive film to be suspended in an air floating channel formed by the gap between a convex upper mold and a concave lower mold.

[0012] Furthermore, the air pressures of the plurality of downward jets of air are not the same, and the air pressures of the plurality of downward jets of air are not the same.

[0013] Furthermore, the width of the through groove is greater than n*d, where n is the number of laser light source modules, n≥1, and d is the cross-sectional diameter of the laser beam when passing through the through groove.

[0014] Furthermore, each laser light source module includes a laser light source, a collimating mirror, and at least one imaging lens. The laser beam emitted by the laser light source is collimated by the collimating mirror and then emitted parallelly. After passing through the imaging lens, it converges radially outward along the turntable onto the flexible photosensitive film.

[0015] Furthermore, the laser light source module further includes a sleeve. The laser light source, the collimating mirror, and the imaging lens are all arranged inside the sleeve, and the sleeve is arranged in a cavity on the outer side wall of the turntable.

[0016] Furthermore, the output shaft is coaxial with the axis line.

[0017] The present invention also discloses a method for exposing a flexible photosensitive film using this device, including the following steps:

[0018] S1. Calculate the line spacing of each row of images according to the resolution of the image to be exposed;

[0019] S2. Place the flexible photosensitive film in the air floating channel and make it float in an arc shape;

[0020] S3. The computer controls the coordinated movement of the turntable and the flexible photosensitive film so that at least one laser beam exposes each row of images on the flexible photosensitive film along the wide side.

[0021] Furthermore, the specific steps of step S2 are:

[0022] S21: Place the flexible photosensitive film into the gap between the convex upper mold and the concave lower mold;

[0023] S22: By adjusting the air pressure magnitudes of the plurality of downward jets of air and the air pressure magnitudes of the plurality of upward jets of air, make the flexible photosensitive film be in an arc-shaped floating state in the vertical direction and keep it all the time.

[0024] Advantageous technical effects of the present invention: By using the present device and method, a number of first air intake through-holes are uniformly arranged on the baffle plate and lead downward to the convex upper die, and a number of second air intake through-holes are uniformly arranged on the base and lead vertically upward to the concave lower die; a number of air jets are sprayed downward through the number of first air intake through-holes onto the upper surface of the flexible photosensitive film, and a number of air jets are sprayed upward through the number of second air intake through-holes onto the lower surface of the flexible photosensitive film. Under the combined action of the number of downward airflows and the number of upward airflows, the flexible photosensitive film is suspended in the air-floating channel formed by the gap between the convex upper die and the concave lower die. The motor drives the turntable to rotate, and at least one laser light source module rotates back and forth following the turntable, and scans and exposes each row of images on the wide side of the flexible photosensitive film in a fan-shaped manner row by row until all rows of images are exposed. This device solves the problem that the flexible photosensitive film is not easy to fix and expose due to its soft texture, and improves the exposure quality of the flexible photosensitive film. BRIEF DESCRIPTION OF THE DRAWINGS

[0025] Figure 1 is a schematic diagram of the module connection of the present invention;

[0026] Figure 2 is Figure 1 an exploded view of the baffle plate 4, the flexible photosensitive film 8 and the base 9 in

[0027] Figure 3 is Figure 2 a view along the B direction in

[0028] Figure 4 is a schematic diagram of a laser beam 21 passing through the through-slot 41 (the first air intake through-hole 43 is omitted);

[0029] Figure 5 is a schematic diagram of the connection between the turntable 1 and the motor 3;

[0030] Figure 6 is a schematic diagram of the part of the flexible photosensitive film in the air-floating channel slightly indented inward along both wide sides to form a concave arc surface;

[0031] Figure 7 is Figure 5 an enlarged view at D of

[0032] Figure 8 is a schematic diagram of 3 laser beams 21 passing through the through-slot 41 along the wide side;

[0033] Figure 9 is a schematic diagram of the smooth transition from a gradually changing curved surface to an arc surface in the middle on both sides of the convex upper die 44 and the concave lower die 92;

[0034] Figure 10 is a schematic diagram of 3 laser beams simultaneously exposing several rows of images of the flexible photosensitive film along the wide side direction. Detailed implementation mode

[0035] Next, the technical solutions in the embodiments of the present invention will be clearly and completely described in conjunction with the accompanying drawings in the embodiments of the present invention. Obviously, the described embodiments are only a part of the embodiments of the present invention, rather than all the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those of ordinary skill in the art without creative efforts shall fall within the protection scope of the present invention.

[0036] In the description of the present invention, it should be noted that the orientation or positional relationship indicated by the terms "center", "upper", "lower", "left", "right", "vertical", "horizontal", "inner", "outer", etc. is based on the orientation or positional relationship shown in the accompanying drawings, and is only for the convenience of describing the present invention and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore cannot be understood as a limitation of the present invention; the terms "first", "second", "third" are only used for description and cannot be understood as indicating or implying relative importance. In addition, unless otherwise clearly defined and limited, the terms "installation", "connection", "connection" should be understood in a broad sense. For example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be directly connected or indirectly connected through an intermediate medium, and it can be the internal communication of two elements. For those of ordinary skill in the art, the specific meanings of the above terms in the present invention can be understood according to specific circumstances.

[0037] Refer to Figure 1 , Figure 1 , which is a structural connection schematic diagram of the present invention. A device for laser imaging on a flexible photosensitive film disclosed in the present invention includes: a turntable 1, a laser light source module 2, a motor 3, a baffle 4, an air float channel 5 and a computer 6. The output shaft of the motor 3 is connected to the turntable 1, and the output shaft of the motor 3 and the axis of the turntable 1 coincide. The motor 3 provides power for the reciprocating rotation of the turntable 1. The laser light source module 2 is arranged on the end face of the turntable 1 facing away from the motor 3, and the laser light source module 2 is arranged along the radial direction of the turntable 1, and the laser beam 21 emitted by it is emitted radially outward along the turntable 1. The baffle 4 is arranged directly below the turntable 1. Refer to Figure 1 and Figure 2 . A through groove 41 is arranged on the baffle 4 for the laser beam 21 emitted by the laser light source module 2 to pass through and be used. Figure 1 The cross-sectional part of Figure 2 is obtained by a full cross-section along the long side center line 42 of the through groove 41 in the downward A-A direction in Figure 1 . Therefore, Figure 2 the first air intake through hole 43 and the second air intake through hole 91 in Figure 1In it, several downward and upward airflows 7 are ejected into the air flotation channel 5. By adjusting the flow velocity and air pressure of the airflows, the flexible photosensitive film 8 is suspended in the air flotation channel 5 in a roughly hemispherical and slightly concave shape, as shown in Figure 7 . Under the control of the computer 6, the motor 3 drives the turntable 1 to rotate reciprocally, so that the laser light source module 2 rotates reciprocally back and forth. The laser beam 21 emitted by the laser light source module 2 passes through Figure 1 and Figure 2 the through slot 41 of the baffle 4 in Figure 1 、 Figure 2 and Figure 6 , and is fan-shaped and concave along the wide side of the flexible photosensitive film 8 row by row. Refer to

[0038] Refer to Figure 4 and Figure 7 . When Figure 7 there is one laser light source module 2 in Figure 7 , the width of the through slot 41 is designed to be greater than the diameter of the laser beam 21 when passing through the through slot 41, and other parts of the baffle 4 are light-tight. The greater here should be understood as slightly greater, just allowing the laser beam 21 to pass through. When there are Figure 8 3 laser light source modules 2 as shown in

[0039] Refer to Figure 1 、 Figure 2 and Figure 5 and Figure 6 , as one of the embodiments, the airflows 7 in the air flotation channel 5 are formed by the gas ejected from the baffle 4 and the base 9. Refer to Figure 2 and Figure 3 , on the upper end surface of the baffle 4, a number of first air intake through holes 43 are evenly distributed. Each first air intake through hole 43 vertically penetrates downward to the convex upper mold 44 on the lower end surface of the baffle 4. After being pressurized, the gas is ejected downward from all the first air intake through holes 43 to form several airflows 7, and several airflows 7 are sprayed onto the upper surface of the flexible photosensitive film 8; Refer to Figure 2, at the lower end of the base 9, a number of second air intake through-holes 91 corresponding one by one to a number of first air intake through-holes 43 are evenly distributed. Each second air intake through-hole 91 directly leads upward to the concave lower mold 92 on the upper end surface of the baffle 4. When the gas is pressurized, it jets upward through the number of second air intake through-holes 91, forming a number of upward jet airflows 7 that jet onto the lower surface of the flexible photosensitive film 8. Therefore, there are a number of downward and upward jet airflows in the air floating channel 5. The downward and upward jet airflows jet onto the upper surface and the lower surface of the flexible photosensitive film 8 respectively. By adjusting the speeds of the number of downward jet airflows and the number of upward jet airflows, the flexible photosensitive film 8 can be balanced in force and suspended in the air floating channel 5 (see Figure 1 ). From Figure 1 and Figure 2 , it can be known that the air floating channel 5 is formed by the gap between the convex upper mold 44 and the concave lower mold 92. Refer to Figure 7 . It should be noted that since the material of the flexible photosensitive film 8 is relatively soft and cannot be folded or bent significantly during the exposure process. When the flexible photosensitive film 8 is exposed in the air floating channel 5, it can only be slightly bent inward along the wide side by a little, so that a small part of the flexible photosensitive film 8 bulges outward along the wide side approximately in a cylindrical shape, as shown in part c. Therefore, the outer shapes of the convex upper mold 44 and the concave lower mold 92 need to be adapted to the Figure 5 part c of the flexible photosensitive film 8 in

[0040] . From Figure 1 , it can be known that the air floating channel 5 is formed by the gap between the convex upper mold 44 with gradually changing curved surfaces on both sides and a convex circular arc surface in the middle and the concave lower mold 92. Refer to Figure 9 . Figure 9 is a schematic diagram of the smooth transition from gradually changing curved surfaces on both sides to a circular arc surface in the middle of the convex upper mold 44 and the concave lower mold 92. The convex upper mold 44 is smoothly transitioned from a gradually changing smooth surface to an inward concave circular arc surface FG along the wide side direction of the flexible photosensitive film 8, and then to a gradually changing smooth surface GH. The so-called gradually changing smooth surface EF means that the surface radius Ra of the smooth surface EF is a variable, that is, the radius values of each point on the smooth surface EF are different. In the part of the inward concave circular arc surface FG, the radius value Rb of any point is the same. The gradually changing smooth surface GH is symmetric with respect to the central plane SS. Therefore, the radius value of the gradually changing smooth circular surface GH is also Ra. Therefore, the surface EH of the entire upper mold is a smooth circular arc transition and is convex in the middle part. Refer to Figure 2 . Matched with the convex upper mold, a concave lower mold 92 is provided on the upper end surface of the base 9. The upper surface of the concave lower mold 92 is also a smooth circular arc transition, that is, Figure 9 IJ in

[0041] As a preferred embodiment, refer to Figure 5 and Figure 7 Each laser light source module 2 includes a laser light source 22, a collimator 23 and at least one imaging lens 24. The laser light beam 21 emitted by the laser light source 22 is collimated by the collimator 23 and then emitted in parallel to the imaging lens 24. After being transmitted by the imaging lens 24, the laser light beam 21 is emitted outward along the radial direction of the turntable 3 and then converges onto the inner concave surface of the flexible photosensitive film 8 (see Figure 1 ), as the turntable 3 reciprocates, the laser beam 21 passes through the through slot 41 in a fan-shaped manner to expose each line of the image on the wide side of the flexible photosensitive film 8 line by line.

[0042] When there is only one laser light source module 2, after a laser beam 21 exposes a line of images line by line along the wide side of the flexible photosensitive film 8 in a fan shape, the computer controls the laser light source 22 to stop emitting light, and the computer 6 controls the flexible photosensitive film 8 to move forward a distance of one pixel along the long side. That is to say, the moving direction of the flexible photosensitive film 8 is perpendicular to the fan-shaped scanning plane formed by the laser beam, that is, it moves along the long side of the flexible photosensitive film 8. Therefore, after the laser beam 21 exposes a line of images along the wide side of the flexible photosensitive film 8, the flexible photosensitive film 8 moves a distance of one pixel along the long side under the control of the computer, and the laser beam exposes the next line of images until all the lines of images on the wide side are exposed line by line. During the movement of the flexible photosensitive film 8 along the long side, the computer 6 controls the laser light source 22 not to emit light. Since the flexible photosensitive film 8 is in the air flotation channel 5 (see FIG. 5 ), the flexible photosensitive film 8 moves along the long side. Figure 1 ) is roughly in the shape of a slightly concave arc. Figure 2 , Figure 3 and Figure 6 ,therefore, Figure 1 The flexible photosensitive film 8 in Figure 2 Looking in the direction B, the side surface is a concave arc, and the laser beam 21 exposes the inner surface of the flexible photosensitive film 8 line by line with a constant focal length.

[0043] refer to Figure 10 , when the laser light source module 2 is Figure 5 , Figure 7 and Figure 8 In the exemplary three hours shown, the computer 6 (see Figure 1 ) Control the three laser light source modules 2 on the turntable 1 to move simultaneously along Figure 10The wide side of the flexible photosensitive film 8 shown is simultaneously exposed to the 3 rows of images A11, A21, and A31 in the first group. After the exposure is completed, the computer 6 controls the 3 laser light source modules 2 to stop emitting light, and then controls the flexible photosensitive film 8 to move a distance of one pixel along the long side. The computer 6 controls the 3 laser light source modules 2 to emit light, and exposes the 3 rows of images A12, A22, and A32 in the first group. After the exposure is completed, the computer 6 controls the 3 laser light source modules 2 to stop emitting light, continues to control the flexible photosensitive film 8 to move a distance of one pixel along the long side, the computer 6 controls the 3 laser light source modules 2 to emit light, and exposes the 3 rows of images A13, A23, and A33 in the first group. Then, the computer 6 controls the flexible photosensitive film 8 to move a distance of 6 pixel points along the long side (the line spacing between adjacent two rows of images is equal to the size of one pixel point), so that the first of the 3 laser light source modules 2 contacts the A11 row of the second group, and then the 3 laser light source modules 2 expose the second group of images in the same way as the images in the first group are exposed. And so on, when the number of laser light source modules 2 is n (n≥1), the number of rows of images exposed by the two laser beams emitted by every two adjacent laser light source modules 2 on the flexible photosensitive film 8 has an interval of t rows, and the diameter of the pixel points of the image to be exposed is u. Then after the n laser beams expose the first group of n*t rows of images, the computer controls the n laser light source modules to pause emitting light, and controls the flexible photosensitive film 8 to move a distance of (n - 1)*t*u along the long side direction, and then exposes the second group of n*t rows of images; after the second group of n*t rows of images are exposed, the computer controls the n laser light source modules to pause emitting light, and controls the flexible photosensitive film 8 to move a distance of (n - 1)*t*u along the long side direction, and exposes the third group of n*t rows of images until all the rows of images divided along the wide side on the flexible photosensitive film are exposed.

[0044] It should be noted that in this application, the gas is preferably air because air has no cost. Changing air into an air flow can be achieved by a blower or other devices. The gas can also be other gases, such as hydrogen, helium, and argon, etc., which are not limited herein.

[0045] The above air floating channel is only one embodiment. In fact, the structures of the air floating channels are diverse, but their ultimate purpose is to suspend the flexible photosensitive film 8 in the gas to prevent the flexible photosensitive film 8 from contacting other objects and prevent collision and friction.

[0046] The present invention also discloses a method for exposing a flexible photosensitive film by using the above device, including the following steps:

[0047] S1. Calculate the line spacing of each row of images according to the resolution of the image to be exposed;

[0048] S2. Place a part of the flexible photosensitive film in the air floating channel and make it float in an arc shape;

[0049] S3. The computer controls the turntable and the flexible photosensitive film to act in coordination so that at least one laser beam exposes each row of images on the flexible photosensitive film along the wide side.

[0050] In step S1, once the resolution of the image to be exposed is determined, the size of each pixel can be determined. The image to be exposed is divided into several rows, and the line spacing between every two adjacent rows of images is the size of one pixel.

[0051] In step S2, by adjusting the air pressures of the downward and upward airflows ejected in the air-floating channel, the upper and lower surfaces of the flexible photosensitive film 8 are subjected to two impact forces, downward and upward. The two impact forces finally form a resultant force to make the flexible photosensitive film 8 float in the air-floating channel, so that the flexible photosensitive film 8 does not contact other objects during the exposure process, preventing the photosensitive ink on it from falling off and improving the exposure quality.

[0052] In step S2, the method of placing the flexible photosensitive film in the air-floating channel and making it float is as follows: Refer to Figure 3 , first, place the flexible photosensitive film 8 between the convex upper die 44 and the concave spherical lower die 92, and then blow several downward airflows (see the several downward arrows in Figure 1 ) through several first air intake channels 43, and eject several upward airflows (see the several upward arrows in Figure 1 through several second air intake channels 91. By adjusting the magnitudes of the upward and downward airflows, the several downward airflows and the several upward airflows suspend that part of the flexible photosensitive film 8 in the air-floating channel 5 composed of the convex spherical upper die 44 and the concave spherical lower die 92, and keep its wide side in an arc shape until that part of the flexible photosensitive film 8 is completely exposed, preventing the flexible photosensitive film 8 from being not easily fixed due to its soft material during the exposure process and improving the exposure quality.

[0053] The coordinated action in step S3 means:

[0054] 1. When there is one laser light source module 2, after a fan-shaped laser beam 21 exposes one row of images along the wide side of the flexible photosensitive film 8 row by row, the computer controls the laser light source 22 to pause emitting light, and the computer 6 controls the flexible photosensitive film 8 to advance a distance of one pixel along the long side. That is to say, the advancing direction of the flexible photosensitive film 8 is perpendicular to the fan-shaped scanning plane formed by the laser beam, that is, it advances along the long side direction of the flexible photosensitive film 8. Therefore, after the laser beam 21 exposes each row of images along the wide side of the flexible photosensitive film 8, the flexible photosensitive film 8 advances a distance of one pixel along the long side under the control of the computer, and then the laser beam exposes the next row of images until all the rows of images on the wide side are exposed row by row. During the movement of the flexible photosensitive film 8 along the long side, the computer 6 controls the laser light source 22 not to emit light.

[0055] II. References Figure 10 , when the laser light source module 2 is Figure 5 , Figure 7 and Figure 8 the exemplary three shown in the figure, the computer 6 (see Figure 1 ) controls the three laser light source modules 2 on the turntable 1 to simultaneously expose the first group of three rows of images A11, A21, and A31 along the wide side of the flexible photosensitive film 8 shown in Figure 10 . After the exposure is completed, the computer 6 controls the three laser light source modules 2 to stop emitting light, then controls the flexible photosensitive film 8 to move a pixel distance along the long side. The computer 6 controls the three laser light source modules 2 to emit light and exposes the first group of three rows of images A12, A22, and A32. After the exposure is completed, the computer 6 controls the three laser light source modules 2 to stop emitting light, continues to control the flexible photosensitive film 8 to move a pixel distance along the long side, the computer 6 controls the three laser light source modules 2 to emit light, and exposes the first group of three rows of images A13, A23, and A33. Then, the computer 6 controls the flexible photosensitive film 8 to move a distance of six pixel points along the long side (the row spacing between adjacent two rows of images is equal to the size of one pixel point), so that the first of the three laser light source modules 2 contacts the A11 row of the second group, and then the three laser light source modules 2 expose the second group of images in the same method as the exposure of the first group of images. And so on, when the number of the laser light source modules 2 is n (n≥1), the number of rows of images exposed by the two laser beams emitted by every two adjacent laser light source modules 2 on the flexible photosensitive film 8 has an interval of t rows, and the diameter of the pixel points of the image to be exposed is u. Then after the n laser beams expose the first group of n*t rows of images, the computer controls the n laser light source modules to pause emitting light, and controls the flexible photosensitive film 8 to move a distance of (n - 1)*t*u along the long side direction, and then exposes the second group of n*t rows of images; after the second group of n*t rows of images is exposed, the computer controls the n laser light source modules to pause emitting light, and controls the flexible photosensitive film 8 to move a distance of (n - 1)*t*u along the long side direction, and exposes the third group of n*t rows of images until all the rows of images divided along the wide side on the flexible photosensitive film are exposed.

[0056] It should be noted that Steps S1 - S3 do not necessarily represent a specific sequence. In some cases, appropriate adjustment of the sequence also falls within the protection scope of this patent application.

[0057] Technical effects of the device and method: By uniformly arranging a number of first air intake through holes on the baffle plate that lead downward to the convex upper die, and uniformly arranging a number of second air intake through holes on the base that lead vertically upward to the concave lower die; spraying a number of airflows downward through the number of first air intake through holes onto the upper surface of the flexible photosensitive film, and spraying a number of airflows upward through the number of second air intake through holes onto the lower surface of the flexible photosensitive film. Under the combined action of the number of downward airflows and the number of upward airflows, the flexible photosensitive film is suspended in the air floating channel formed by the gap between the convex upper die and the concave lower die. At least one laser beam, under the rotation of the turntable, scans each row of the image to be exposed row by row in a fan shape until all rows of the image are exposed, so that the flexible photosensitive film is in a suspended gas environment during the exposure process, avoiding the shedding of the photosensitive ink caused by frictional contact with other objects.

[0058] Finally, it should be noted that the above are only the preferred embodiments of the present invention and are not used to limit the present invention. Although the present invention has been described in detail with reference to the foregoing embodiments, for those skilled in the art, they can still modify the technical solutions recorded in the foregoing embodiments, or perform equivalent replacements for some of the technical features. Any modifications, equivalent replacements, improvements, etc. made within the spirit and principle of the present invention shall be included in the protection scope of the present invention.

Claims

1. An apparatus for laser imaging on a flexible photosensitive film, characterized in that, include: A turntable, at least one laser light source module, a motor, a baffle, a base, an air flotation channel and a computer; The output shaft of the motor is connected to the turntable, the at least one laser light source module is arranged in a row on the circumferential side wall of the turntable along the axis of the turntable, the baffle is arranged directly below the turntable, and a through groove for the light path to pass through is arranged on the baffle, and an air flow is sprayed in the air floating channel so that the flexible photosensitive film is suspended in the air floating channel; The motor drives the turntable to reciprocate along the axis, and the at least one laser light source module emits at least one laser beam, and the laser beam passes through the through slot to expose the flexible photosensitive film line by line, so as to transfer the image stored in the computer to the flexible photosensitive film; The lower end of the baffle is provided with a convex upper mold with gradually changing curved surfaces on both sides and a convex arc curved surface smoothly transitioning to the middle, and a plurality of first air inlet holes are evenly distributed on the baffle, and the plurality of first air inlet holes are directly connected to the convex upper mold, and a plurality of air flows are sprayed downward from the plurality of first air inlet holes to the upper surface of the flexible photosensitive film; The upper end of the base is provided with a concave lower mold adapted to the convex upper mold, and the base is evenly distributed with a plurality of second air inlet holes corresponding to the plurality of first air inlet holes, and the plurality of second air inlet holes are directly connected to the concave lower mold, and a plurality of air flows are sprayed upward from the plurality of second air inlet holes to the lower surface of the flexible photosensitive film; A plurality of air streams jetted downward and a plurality of air streams jetted upward make the flexible photosensitive film suspended in the air flotation channel formed by the gap between the convex upper mold and the concave lower mold; The air pressures of the plurality of air streams sprayed downward are not the same, and the air pressures of the plurality of air streams sprayed upward are not the same.

2. The device according to claim 1, characterized in that The width of the through slot is greater than n*d, where n is the number of the laser light source modules, n≥1, and d is the cross-sectional diameter of the laser beam when it passes through the through slot.

3. The device according to claim 1, characterized in that, Each of the laser light source modules includes a laser light source, a collimator and at least one imaging lens. The laser light beam emitted by the laser light source is collimated by the collimator and then emitted in parallel. After being transmitted by the imaging lens, it converges radially outward along the turntable onto the flexible photosensitive film.

4. The device according to claim 3, characterized in that, The laser light source module further comprises a sleeve, wherein the laser light source, the collimating mirror and the imaging lens are all arranged in the sleeve, and the sleeve is arranged in a hole on the outer side wall of the turntable.

5. The device according to claim 1, characterized in that, The output shaft is coaxial with the shaft center line.

6. A method for exposing a flexible photosensitive film using the device according to any one of claims 1-5, characterized in that, The steps include: S1. Calculate the line spacing of each row of the image according to the resolution of the image to be exposed; S2. placing the flexible photosensitive film in the air flotation channel and suspending it in an arc shape; S3. The computer controls the turntable and the flexible photosensitive film to move in coordination, so that the at least one laser beam exposes each row of the image on the flexible photosensitive film along the wide side.

7. The method according to claim 6, wherein The specific steps of step S2 are: S21: placing the flexible photosensitive film into the gap between the convex upper mold and the concave lower mold; S22: By adjusting the air pressure of several downward jets and the air pressure of several upward jets, the flexible photosensitive film is kept in an arc-shaped suspended state in the vertical direction and maintained all the time.

Images