CN114374771A

CN114374771A - Film scanning device

Info

Publication number: CN114374771A
Application number: CN202210025610.1A
Authority: CN
Inventors: 张�杰; 牛斌
Original assignee: Chengdu Yida Yunfei Technology Co ltd
Current assignee: Chengdu Yida Yunfei Technology Co ltd
Priority date: 2022-01-11
Filing date: 2022-01-11
Publication date: 2022-04-19
Anticipated expiration: 2042-01-11
Also published as: CN114374771B

Abstract

The invention provides a film scanning device, which comprises a rack, and a light receiving unit, an optical scanning assembly, a film conveying assembly, a film output guide structure, a film taking-out assembly and a control circuit which are arranged in the rack, wherein the film conveying assembly is arranged on the rack; a film carrying platform is arranged on the upper surface of the frame; the optical scanning assembly is arranged below the film carrying platform, the light receiving unit is arranged opposite to the optical scanning assembly, and the film conveying assembly is arranged between the optical scanning assembly and the light receiving unit; the film output guide structure is correspondingly arranged at one end of the film conveying assembly positioned at the film outlet; the film taking-out assembly is arranged at the bottom of the inner cavity of the frame and corresponds to one film outlet side of the film output guide structure; the control circuit is installed at the bottom of the inner cavity of the frame. The invention has the beneficial effects that: the resolution ratio of graphic output can be improved, the scanning quality is ensured, the film blockage and the clamping stagnation condition are prevented, and the scanning efficiency is improved.

Description

Film scanning device

Technical Field

The invention relates to the technical field of film scanners for industry and medical treatment, in particular to a film scanning device.

Background

At present, the film scanning technology in China is relatively lagged, the traditional film scanning device has a complex integral structure, and is mainly applied to the fields of digital scanning of X-ray films after industrial nondestructive testing, digital scanning of medical X-ray films and the like. The conventional film scanning apparatus used in the market today has the following disadvantages:

first, conventional film scanning devices employ a light source mobile scanning device, namely: the film is placed still, scanning components such as an illumination light source and the like move from one end of the film to the other end of the film at a constant speed in a mechanical operation mode driven by a driving motor to scan, the scanning mode has low scanning precision, low resolution of a scanned image and poor image gray scale quality, and the later film viewing diagnosis is seriously influenced;

secondly, when films with different specifications and sizes are output in a staggered and sequential mode, the traditional film scanning device often has a film blocking phenomenon, so that an operator is required to frequently check a film taking-out assembly and perform manual intervention and arrangement on the output films to prevent the films from being blocked and scratched, the labor intensity of the operator is increased due to the complicated work, and the working efficiency is low;

thirdly, the traditional film scanning device has a complex structure and is inconvenient to operate, and meanwhile, the film taking-out assembly is inconvenient to take out the film and cannot be automatically adjusted to a position suitable for taking the film, so that the whole machine cannot continuously and normally operate directly, and the working efficiency is not high;

fourth, traditional film scanning device can not detect film scanning image's quantity in rapid succession whether unanimous with the film quantity of scanning, adopts the mode of artifical proofreading to go on, probably because trouble reasons such as light path can appear leaking the scanning phenomenon for the film reads the picture of storage and the film quantity of actual scanning output inconsistent, and intelligent degree is not high, influences whole film scanning efficiency.

In view of the above technical problems in the prior art, a technical solution for solving the above technical problems is needed.

Disclosure of Invention

Accordingly, the present invention is directed to a film scanning device, which can improve the resolution of pattern output, ensure the scanning quality, prevent the film from being jammed and jammed, and improve the scanning efficiency.

The invention provides a film scanning device, which comprises a rack, a light receiving unit arranged in the rack, an optical scanning assembly, a film conveying assembly, a film output guide structure, a film taking-out assembly and a control circuit, wherein the optical scanning assembly, the film conveying assembly, the film output guide structure, the film taking-out assembly and the control circuit are respectively arranged in the rack.

The upper surface of the frame is provided with a film carrying platform corresponding to the film conveying assembly; a film inlet corresponding to the film conveying component is arranged at one side of the film carrying platform, which is close to the film conveying component; the optical scanning assembly is arranged below the film carrying platform, the light receiving unit is arranged opposite to the optical scanning assembly, and the film conveying assembly is arranged between the optical scanning assembly and the light receiving unit; the film output guide structure is correspondingly arranged at one end of the film conveying assembly positioned at the film outlet; the film taking-out assembly is arranged at the bottom of the inner cavity of the frame and corresponds to one film outlet side of the film output guide structure; the control circuit is installed at the bottom of the inner cavity of the frame.

The optical scanning assembly comprises an optical substrate, and a first cylindrical lens, a second cylindrical lens, a laser oscillator, an f-theta lens, a beam expander, a first reflecting mirror, a second reflecting mirror, a third reflecting mirror, a fourth reflecting mirror, a rotary polygon prism, a shielding partition plate and a photoelectric sensor which are correspondingly arranged on the optical substrate respectively. The first cylindrical lens is fixedly arranged on the optical substrate along the width direction of the optical substrate through a lens mounting frame and is arranged close to one side of the light receiving unit; a length of the first cylindrical lens corresponds to a length of the light receiving unit; the rotating polygonal prism is centrally disposed on the optical substrate on a side away from the first cylindrical lens; the f-theta lens is centrally disposed on the optical substrate and disposed closer to a side of the rotating polygon mirror; the laser oscillator is installed between the first cylindrical lens and the f-theta lens and is disposed near a side edge of the optical substrate; a first reflector and a second reflector are respectively arranged on the side, far away from the first cylindrical lens, of the optical substrate, close to the edge and on the two opposite sides behind the rotating polygon prism, the first reflector is arranged on the side corresponding to the laser oscillator, and a beam expander is arranged between the laser oscillator and the first reflector; the laser oscillator, the first reflector and the beam expander are linearly aligned; the photoelectric sensor is arranged on the opposite side of the laser oscillator, a third reflector is arranged between the photoelectric sensor and the second reflector, and the photoelectric sensor, the second reflector and the third reflector are aligned in a straight line; the third reflector is positioned between the first cylindrical lens and the f-theta lens and is close to one side of the f-theta lens; the second cylindrical lens is arranged between the first reflector and the second reflector and is in linear alignment with the first reflector and the second reflector; the fourth reflecting mirror is arranged between the first cylindrical lens and the photoelectric sensor and is arranged close to one side of the first cylindrical lens; and a shielding partition plate is arranged between the third reflector and the light reflection direction of the rotary multi-face prism, and the shielding partition plate is close to one side of the f-theta lens.

Preferably, the film conveying assembly comprises a first conveying unit, a second conveying unit and a third conveying unit; the first conveying unit is arranged on one side of the film inlet; the third conveying unit is arranged on one side of the sheet outlet; the second conveying unit is arranged between the first conveying unit and the third conveying unit; the first conveying unit and the third conveying unit respectively comprise a first silica gel driving roller and a first silica gel driven roller, and a film conveying space is formed between the first silica gel driving roller and the first silica gel driven roller; the second conveying unit comprises a second silica gel driving roller and a second silica gel driven roller which are connected through a first silica gel belt, and a second silica gel driving roller and a second silica gel driven roller which are connected through a second silica gel belt; a film conveying space is formed between the first silica gel belt and the second silica gel belt; and a scanning reading area matched with the optical scanning assembly and the light receiving unit is formed between the sheet outlet of the second conveying unit and the sheet inlet of the third conveying unit.

Preferably, the film output guide structure comprises a first inclined guide section, a second inclined guide section, a third vertical guide section and a fourth inclined guide section which are integrally bent and formed; the first inclined guide section is arranged close to one side of the sheet outlet of the third conveying unit; the second inclined guide section is arranged in a downward inclined mode; the first inclined guide section is arranged close to one side of the light receiving unit in an inclined mode; the fourth inclined guide section is arranged in an inclined manner close to one side far away from the light receiving unit.

Preferably, the film taking-out assembly comprises an electric push rod, a pin shaft, a hinged movable joint and a movable guide plate; the electric push rod is fixedly arranged at the bottom of the inner cavity of the rack through a mounting bracket, the power output end of the electric push rod is connected with the hinged movable joint through a pin shaft, and the movable guide plate is mounted on the hinged movable joint; the hinged articulated headrest is arranged towards one side of the fourth inclined guide section; one side of the movable guide plate is hinged with the fourth inclined guide section through a hinge.

Preferably, a baffle is integrally formed on one side of the movable guide plate, which is far away from the fourth inclined guide section.

Preferably, one side of the film carrying platform is provided with a first film detection sensor arranged on the frame; a second film detection sensor is arranged between the first conveying unit and the second conveying unit; and a third film detection sensor is arranged between the third conveying unit and the film output guide structure.

Preferably, a film counting sensor is arranged between the film output guide structure and the movable guide plate.

Preferably, the light receiving unit includes a condenser and a photoelectric converter.

Preferably, the formula A is less than or equal to L, wherein A is the length of the first film, and L is the length of the movable guide plate.

Preferably, the formula is satisfied, wherein A is more than or equal to L is less than or equal to Acos theta + B, wherein A is the length of the first film, L is the length of the movable guide plate, B is the length of the second film, theta is the included angle between the movable guide plate and the second inclined guide section when the movable guide plate is in the initial slide glass state, and theta is more than or equal to 15 degrees and less than or equal to 45 degrees.

The invention has the beneficial effects that:

1. the optical scanning component comprises an optical substrate, a first cylindrical lens, a second cylindrical lens, a laser oscillator, an f-theta lens, a beam expander, a first reflector, a second reflector, a third reflector, a fourth reflector, a rotary multi-face prism, a shielding clapboard and a photoelectric sensor which are respectively and correspondingly arranged on the optical substrate, wherein the optical scanning component adopts the modes of light path transmission of the rotary multi-face prism, the reflection of the cylindrical lens, the f-theta lens and the photoelectric sensor to scan, read and store information, can detect that the difference between the lightest color and the darkest color of a film is high, has high resolution of an output image, has good image gray scale and high dynamic density range of the image, can better capture the hierarchical information on the image of the film, ensures the quality of the scanned image to be well ensured, and can well improve the film viewing effect and the diagnostic performance at the later stage, the storage efficiency and later retrieval efficiency of the image information of the X-ray film are improved to a certain extent;

2. by arranging the film taking-out assembly, one side of the movable guide plate is hinged with the fourth inclined guide section through a hinge, so that the clamping stagnation phenomenon is avoided, and the running performance of the whole device is improved;

3. the first film detection sensor, the second film detection sensor and the third film detection sensor are respectively arranged, so that the whole control system can know the real-time position of the film and the dynamic change information thereof through the detection sensor information, the intelligent control in the scanning process is sequentially realized, and the manual intervention detection is reduced;

4. the film counting sensor is arranged, so that the film counting sensor is convenient to take out films in an integral stacking manner, excessive manual intervention is not needed in the whole process, intelligent control is realized, and the working intensity of operators is reduced;

5. the conditional expression A is less than or equal to L and less than or equal to Acos theta + B, so that when films with different sizes are scanned, the situation of blocking caused by different sizes of the films is not needed to be worried about, the situation of scraping of the output films which possibly occur is avoided, the films do not need to be tidied by frequent manual intervention, and the working strength of operators is reduced.

Drawings

Fig. 1 is a perspective view of the present invention.

Fig. 2 is a cross-sectional view of an optical scanning assembly.

Fig. 3 is a side sectional view of the present invention (film take-out assembly in a film collection state).

Fig. 4 is a side sectional view of the present invention (film take-out assembly in a film take-out state).

Reference numerals: a frame 10, a film take-out unit 11, a film conveying unit 12, a film stage 13, a first film detection sensor 14, an optical substrate 16, a first cylindrical lens 28, a second cylindrical lens 22, a laser oscillator 15, an f-theta lens 20, a beam expander 17, a first reflecting mirror 18, a second reflecting mirror 23, a third reflecting mirror 25, a fourth reflecting mirror 27, a rotary polygon mirror 21, a shielding partition 24, a photoelectric sensor 26, a first conveying unit 19, a second conveying unit 31, a third conveying unit 36, a first film 29, a light receiving unit 30, a first silica gel driving roller 32, an optical scanning unit 33, a film counting sensor 34, a second silica gel belt 35, a film inlet 37, a second film detection sensor 38, a second silica gel driving roller 42, a second silica gel driven roller 39, a driving motor 40, a first silica gel belt 41, a first silica gel driven roller 43, a film driven roller 43, A third film detecting sensor 44, a second inclined guide section 47, a third vertical guide section 45, a film output guide structure 46, a control circuit 48, a hinge 49, a fourth inclined guide section 50, a first inclined guide section 51, an electric push rod 52, a pin shaft 53, a hinged movable joint 54, a movable guide plate 56, a second film 55 and a baffle plate 57.

Detailed Description

For further understanding of the features and technical means of the present invention, as well as the specific objects and functions attained by the present invention, the present invention will be described in further detail with reference to the accompanying drawings and detailed description.

In the present invention, unless otherwise expressly specified or limited, the terms "mounted," "connected," "secured," and the like are to be construed broadly and can include, for example, fixed connections, removable connections, or integral connections; can be mechanically or electrically connected; either directly or indirectly through intervening media, or may be interconnected between two elements. The specific meanings of the above terms in the present invention can be understood by those skilled in the art according to specific situations.

Please refer to fig. 1-4: a film scanning device comprises a frame 10, a light receiving unit 30 arranged in the frame 10, an optical scanning assembly 33, a film conveying assembly 12, a film output guide structure 46, a film taking-out assembly 11 and a control circuit 48 which are respectively arranged in the frame 10.

The upper surface of the frame 10 is provided with a film carrying platform 13 corresponding to the film conveying component 12; a film inlet 37 corresponding to the film conveying component 12 is arranged at one side of the film carrying platform 13 close to the film conveying component 12; the optical scanning assembly 33 is arranged below the film carrier 13, the light receiving unit 30 is arranged opposite to the optical scanning assembly 33, and the film conveying assembly 12 is arranged between the optical scanning assembly 33 and the light receiving unit 30; the film output guide structure 46 is correspondingly arranged at one end of the film conveying component 12 at the film outlet; the film taking-out component 11 is arranged at the bottom of the inner cavity of the frame 10 and corresponds to one film outlet side of the film output guide structure 46; the control circuit 48 is mounted at the bottom of the interior cavity of the housing 10.

The optical scanning unit 33 includes an optical substrate 16, and a first cylindrical lens 28, a second cylindrical lens 22, a laser oscillator 15, an f-theta lens 20, a beam expander 17, a first mirror 18, a second mirror 23, a third mirror 25, a fourth mirror 27, a rotating polygon mirror 21, a shielding spacer 24, and a photosensor 26, which are mounted on the optical substrate 16 in correspondence with each other.

The first cylindrical lens 28 is fixedly provided on the optical substrate 16 in the width direction of the optical substrate 16 by a lens mount and is provided close to the side of the light receiving unit 30; the length of the first cylindrical lens 28 corresponds to the length of the light receiving unit 30; the rotating polygon prism 21 is centrally disposed on the optical substrate 16 on a side away from the first cylindrical lens 28. The f-theta lens 20 is centrally disposed on the optical substrate 16 and is disposed closer to the side of the rotating polygon mirror 21. The laser oscillator 15 is mounted between the first cylindrical lens 28 and the f-theta lens 20 and is disposed near the side edge of the optical substrate 16. A first reflector 18 and a second reflector 23 are respectively arranged on the opposite sides of one side, far away from the first cylindrical lens 28, of the optical substrate 16 close to the edge and behind the rotating polygon mirror 21, the first reflector 18 is arranged on the side corresponding to the laser oscillator 15, and a beam expander 17 is arranged between the laser oscillator 15 and the first reflector 18; the laser oscillator 15, the first mirror 18, and the beam expander 17 are linearly aligned. The photoelectric sensor 26 is arranged on the opposite side of the laser oscillator 15, the third reflector 25 is arranged between the photoelectric sensor 26 and the second reflector 23, and the photoelectric sensor 26, the second reflector 23 and the third reflector 25 are aligned in a straight line; the third mirror 25 is disposed between the first cylindrical lens 28 and the f-theta lens 20 at a position close to one side of the f-theta lens 20. The second cylindrical lens 22 is disposed between the first mirror 18 and the second mirror 23 and is linearly aligned with the first mirror 18 and the second mirror 23. The fourth mirror 27 is disposed between the first cylindrical lens 28 and the photosensor 26 and is disposed near the first cylindrical lens 28 side. A shielding spacer 24 is provided between the third reflecting mirror 25 and the light reflecting direction of the rotating polygon mirror 21, and the shielding spacer 24 is provided near one side of the f-theta lens 20. The light receiving unit 30 includes a condenser and a photoelectric converter.

The laser beam generated in the laser oscillator 15 passes through the beam expander 17 to expand the beam diameter, and then the expanded beam is reflected and guided to the rotating polygon prism 21 through the first reflecting mirror 18, the second cylindrical lens 22, the second reflecting mirror 23, and the third reflecting mirror 25, wherein the beam expander 17 is used for reducing the divergence angle of the incident laser beam and increasing the beam diameter, so that the beam expander 17 is necessary for narrowing the laser beam, which is very beneficial to the collimation of the beam and the focusing of the beam. The light beam reflected and transmitted again by the third reflecting mirror 25 is transmitted to the rotating polygon prism 21 through the shielding partition 24 for shielding the unnecessary light, and then the laser beam reflected by the rotating polygon prism 21 is rotationally swung on a horizontal plane. And then through the f-theta lens 20 and the first cylindrical lens 28 to the film. Thus, the film is scanned in a direction orthogonal to the transport direction. The first cylindrical lens 28 and the second cylindrical lens 22 are optical systems for correcting the inclination of the reflecting mirror of the rotating polygon prism 21, and the f-theta lens 20 is used for better focusing the laser beam on the film and keeping the linear velocity of the incident light with constant angular velocity on the film constant all the time, which is very beneficial to improving the quality of film image scanning and reading and the accuracy and resolution of film scanning, so that the gray scale quality of the finally scanned and read image is good. While the fourth mirror 27 reflects the laser beam onto the photosensor 26 as it swings to the extreme end of the scanning area, so that it acquires a signal for detecting the start of the main scanning, and then the film starts scanning to read the image.

The film transport assembly 12 includes a first transport unit 19, a second transport unit 31, and a third transport unit 36, and the first transport unit 19, the second transport unit 31, and the third transport unit 36 are all driven by a drive motor 40. The first conveying unit 19 is disposed on one side of the film inlet; the third conveying unit 36 is arranged on one side of the sheet outlet; the second conveyance unit 31 is disposed between the first conveyance unit 19 and the third conveyance unit 36. The first conveying unit 19 and the third conveying unit 36 each include a first silicone driving roller 32 and a first silicone driven roller 43, and a film conveying space is formed between the first silicone driving roller 32 and the first silicone driven roller 43. The second conveying unit 31 includes a second silicone driving roller 42 and a second silicone driven roller 39 connected by a first silicone belt 41, and the second silicone driving roller 42 and the second silicone driven roller 39 connected by a second silicone belt 35; a film transfer space is formed between the first silicone belt 41 and the second silicone belt 35; a scanning reading area matched with the optical scanning assembly 33 and the light receiving unit 30 is formed between the sheet outlet of the second conveying unit 31 and the sheet inlet of the third conveying unit 36.

A first film detection sensor 14 mounted on the frame 10 is arranged on one side of the film carrier 13; a second film detection sensor 38 is installed between the first conveyance unit 19 and the second conveyance unit 31; a third film detection sensor 44 is mounted between the third transport unit 36 and the film output guide 46. The first film detection sensor 14, the second film detection sensor 38, and the third film detection sensor 44 are each provided as a photoelectric sensor. Through the structure, the whole control system can know the real-time position of the film and the dynamic change information of the film through detecting the information of the sensor, so that the intelligent control in the scanning process is realized in sequence, and the manual intervention detection is reduced.

In operation, the film is sequentially conveyed to the second conveying unit 31 through the first conveying unit 19, passes through the scanning and reading area from the second conveying unit 31 to the third conveying unit 36, and is scanned and read by the optical scanning assembly 33 under the matched conveying of the second conveying unit 31 and the third conveying unit 36, so that the laser beams of the film sequentially scan the whole surface of the film. Where the second film detection sensor 38 is a film start end detection sensor and the third film detection sensor 44 is an end detection sensor, the information obtained by these detection sensors is transmitted to the control circuit 48. Since the second film detection sensor 38 is activated before the film enters the scanning read zone and the third film detection sensor 44 is activated after the film leaves the scanning read zone, indicating that a film light path scanning portion is complete, the control circuit 48 can know the film position by detecting the sensor information, in turn enabling intelligent control during the scanning process, reducing human intervention.

The film is scanned by laser beam via the scanning and reading area, the transmitted light is received by the light receiving unit 30, and converted into electric signal by light signal, and then transmitted to the control circuit 48, the control circuit 48 receives the signal from the above parts, and after various computer data processing is executed, the scanned and read data is transmitted to the information processing device outside the computer, and various control signals are exchanged, finally a visual image is formed, and then the visual image is stored, so as to realize the intelligent control of film scanning.

The film conveying component 12 adopts a high-quality silica gel roller shaft and a silica gel belt for conveying so as to ensure that the film is not scratched in the conveying process.

The film output guide structure 46 comprises a first inclined guide section 51, a second inclined guide section 47, a third vertical guide section 45 and a fourth inclined guide section 50 which are integrally formed in a bending way; the first inclined guide section 51 is arranged close to one side of the sheet outlet of the third conveying unit 36; the second inclined guide section 47 is arranged obliquely downwards; the first inclined guide section 51 is provided to be inclined toward the light receiving unit 30 side; the fourth inclined guide section 50 is provided to be inclined toward a side away from the light receiving unit 30. A film counter sensor 34 is disposed between the film output guide structure 46 and the movable guide 56. The film output guide 46 is fixed to the frame, and the scanned film is conveyed to the film output guide 46 by the third conveying unit 36, is automatically counted by the film counting sensor 34, and is finally stacked on the movable guide 56 of the film take-out unit 11.

The film taking-out component 11 comprises an electric push rod 52, a pin shaft 53, a hinged movable joint 54 and a movable guide plate 56; the electric push rod 52 is fixedly arranged at the bottom of the inner cavity of the frame 10 through a mounting bracket, the power output end of the electric push rod 52 is connected with the hinged movable joint 54 through a pin shaft 53, and the movable guide plate 56 is arranged on the hinged movable joint 54, so that the electric push rod can move freely, the clamping stagnation phenomenon is avoided, and the running performance of the whole device is improved. The articulated movable joint 54 is arranged close to one side of the fourth inclined guide section 50; one side of the movable guide 56 is hinged to the fourth inclined guide section 50 by a hinge 49. The side of the movable guide plate 56 remote from the fourth inclined guide section 50 is integrally formed with a baffle 57.

The conditional expression A is less than or equal to L, wherein A is the length of the first film 29, and L is the length of the movable guide plate 56.

The method meets the condition that the L is not less than A and not more than Acos theta + B, wherein A is the length of the first film 29, L is the length of the movable guide plate 56, B is the length of the second film 55, theta is the included angle between the movable guide plate 56 and the second inclined guide section 47 when the movable guide plate is in the initial slide glass state, theta is not less than 15 degrees and not more than 45 degrees, namely, A is not less than L, and L-B is not less than Acos theta.

One side of the movable guide plate 56 is hinged with the fourth inclined guide section 50 through a hinge 49, and before the film counting sensor 34 automatically counts the number of the films stacked on the movable guide plate 56 and does not reach the number of the films preset by the control circuit 48, an electric push rod 52 is adopted to drive the movable guide plate 56 to lean against the side of the hinge 49 to be inclined downwards; the film slides down from the film output guide 46 to the movable guide 56 by its own weight, and since the movable guide 56 is inclined downward toward the hinge 49 side, the film dropped into the movable guide 56 continues to move toward the fourth inclined guide section 50 by its own weight and finally comes into abutting contact with the side of the fourth inclined guide section 50, and the operation is repeated so that the films are stacked one after another and stored.

When the second film 55 on the movable guide 56 is a small-sized film and the first film 29 is a large-sized film, the front end of the first film 29 slides onto the second film 55 and then onto the movable guide 56, the back end of the first film 29 falls down by the weight of the film, and the back end of the first film 29 moves to one side of the fourth inclined guide section 50 to be attached to the side of the fourth inclined guide section 50 by the self-gravity. Therefore, even if films with different specifications and sizes are scanned and enter the film taking-out assembly 11 alternately, the phenomenon of blocking after film scanning does not occur like the traditional scanning device, and the films output by the device can be smoothly output and stored on the movable guide plate 56, so that the device does not need the operators to check the films in the film taking-out assembly 11 and carry out manual intervention arrangement and other work, the labor intensity of the operators can be greatly reduced, and the films are effectively prevented from being scratched and damaged.

When a predetermined number of films are stacked and need to be taken, the film counting sensor 34 feeds information back to the control circuit 48, the control circuit 48 follows instructions to control the electric push rod 52 to contract, so as to drive the movable guide plate 56 to incline downwards to one side far away from the fourth inclined guide section 50, and the films stacked on the movable guide plate 56 slide to one side of the baffle 57 through self gravity and are in contact with the baffle 57, so that the films can be smoothly output, the blockage can be avoided, and the final taking-out of the stacked films after the scanning is finished can be facilitated.

The above-mentioned embodiments only express one embodiment of the present invention, and the description thereof is more specific and detailed, but not construed as limiting the scope of the present invention. It will be apparent to those skilled in the art that various changes and modifications can be made without departing from the spirit and scope of the invention.

Claims

1. A film scanning apparatus comprising a frame (10) and a light receiving unit (30) disposed in the frame (10), characterized in that: the film taking machine also comprises an optical scanning component (33), a film conveying component (12), a film output guide structure (46), a film taking-out component (11) and a control circuit (48) which are respectively arranged in the rack (10);

a film carrier (13) corresponding to the film conveying component (12) is arranged on the upper surface of the frame (10); a film inlet (37) corresponding to the film conveying component (12) is arranged on one side, close to the film conveying component (12), of the film carrying platform (13); the optical scanning assembly (33) is arranged below the film carrier (13), the light receiving unit (30) is arranged opposite to the optical scanning assembly (33), and the film conveying assembly (12) is arranged between the optical scanning assembly (33) and the light receiving unit (30); the film output guide structure (46) is correspondingly arranged at one end of the film conveying component (12) at the film outlet; the film taking-out component (11) is arranged at the bottom of the inner cavity of the frame (10) and corresponds to one film outlet side of the film output guide structure (46); the control circuit (48) is arranged at the bottom of the inner cavity of the frame (10);

the optical scanning assembly (33) comprises an optical substrate (16), and a first cylindrical lens (28), a second cylindrical lens (22), a laser oscillator (15), an f-theta lens (20), a beam expander (17), a first reflector (18), a second reflector (23), a third reflector (25), a fourth reflector (27), a rotary polygon mirror (21), a shielding partition plate (24) and a photoelectric sensor (26) which are correspondingly mounted on the optical substrate (16);

the first cylindrical lens (28) is fixedly arranged on the optical substrate (16) along the width direction of the optical substrate (16) through a lens mounting frame and is arranged close to one side of the light receiving unit (30); a length of the first cylindrical lens (28) corresponds to a length of the light receiving unit (30);

the rotating polygon prism (21) is centrally disposed on the optical substrate (16) and on a side remote from the first cylindrical lens (28);

the f-theta lens (20) is centrally disposed on the optical substrate (16) and disposed toward the side of the rotating polygon mirror (21);

the laser oscillator (15) is mounted between the first cylindrical lens (28) and the f-theta lens (20) and is disposed near a side edge of the optical substrate (16);

a first reflector (18) and a second reflector (23) are respectively arranged on two opposite sides of one side, far away from the first cylindrical lens (28), of the optical substrate (16) close to the edge and behind the rotating polygon prism (21), the first reflector (18) is arranged on the side corresponding to the laser oscillator (15), and a beam expander (17) is arranged between the laser oscillator (15) and the first reflector (18); the laser oscillator (15), the first reflector (18) and the beam expander (17) are aligned linearly;

the photoelectric sensor (26) is arranged on the opposite side of the laser oscillator (15), a third reflecting mirror (25) is arranged between the photoelectric sensor (26) and the second reflecting mirror (23), and the photoelectric sensor (26), the second reflecting mirror (23) and the third reflecting mirror (25) are aligned in a straight line; the third mirror (25) is disposed between the first cylindrical lens (28) and the f-theta lens (20) and at a position close to one side of the f-theta lens (20);

the second cylindrical lens (22) is arranged between the first mirror (18) and the second mirror (23) and is in line with the first mirror (18) and the second mirror (23);

the fourth mirror (27) is disposed between the first cylindrical lens (28) and the photosensor (26) and is disposed near a side of the first cylindrical lens (28);

a shielding partition plate (24) is arranged between the third reflector (25) and the light reflection direction of the rotary polygon prism (21), and the shielding partition plate (24) is close to one side of the f-theta lens (20).

2. A film scanning apparatus according to claim 1, wherein: the film conveying assembly (12) comprises a first conveying unit (19), a second conveying unit (31) and a third conveying unit (36);

the first conveying unit (19) is arranged on one side of the film inlet; the third conveying unit (36) is arranged on one side of the sheet outlet; the second conveying unit (31) is arranged between the first conveying unit (19) and the third conveying unit (36);

the first conveying unit (19) and the third conveying unit (36) both comprise a first silicone driving roller (32) and a first silicone driven roller (43), and a film conveying space is formed between the first silicone driving roller (32) and the first silicone driven roller (43);

the second conveying unit (31) comprises a second silica gel driving roller (42) and a second silica gel driven roller (39) which are connected through a first silica gel belt (41), and the second silica gel driving roller (42) and the second silica gel driven roller (39) which are connected through a second silica gel belt (35); a film conveying space is formed between the first silica gel belt (41) and the second silica gel belt (35); and a scanning reading area matched with the optical scanning assembly (33) and the light receiving unit (30) is formed between the sheet outlet of the second conveying unit (31) and the sheet inlet of the third conveying unit (36).

3. A film scanning apparatus according to claim 2, wherein: the film output guide structure (46) comprises a first inclined guide section (51), a second inclined guide section (47), a third vertical guide section (45) and a fourth inclined guide section (50) which are integrally bent and formed; the first inclined guide section (51) is arranged close to one side of a sheet outlet of the third conveying unit (36); the second inclined guide section (47) is arranged downwards; the first inclined guide section (51) is arranged to be inclined toward the light receiving unit (30); the fourth inclined guide section (50) is arranged to be inclined toward a side away from the light receiving unit (30).

4. A film scanning apparatus according to claim 3, wherein: the film taking-out assembly (11) comprises an electric push rod (52), a pin shaft (53), a hinged movable joint (54) and a movable guide plate (56); the electric push rod (52) is fixedly arranged at the bottom of the inner cavity of the rack (10) through a mounting bracket, the power output end of the electric push rod (52) is connected with the hinged movable joint (54) through a pin shaft (53), and the movable guide plate (56) is arranged on the hinged movable joint (54); the hinged movable joint (54) is arranged close to one side of the fourth inclined guide section (50); one side of the movable guide plate (56) is hinged with the fourth inclined guide section (50) through a hinge (49).

5. A film scanning apparatus according to claim 4, wherein: and a baffle plate (57) is integrally formed on one side of the movable guide plate (56) far away from the fourth inclined guide section (50).

6. A film scanning apparatus according to any one of claims 2-5, wherein: a first film detection sensor (14) arranged on the frame (10) is arranged on one side of the film carrier (13); a second film detection sensor (38) is installed between the first conveying unit (19) and the second conveying unit (31); a third film detection sensor (44) is mounted between the third transport unit (36) and the film output guide structure (46).

7. A film scanning apparatus according to claim 4, wherein: a film counting sensor (34) is disposed between the film output guide (46) and the movable guide (56).

8. A film scanning apparatus according to claim 1, wherein: the light receiving unit (30) includes a condenser and a photoelectric converter.

9. A film scanning apparatus according to claim 4, wherein: the conditional expression A is less than or equal to L, wherein A is the length of the first film (29), and L is the length of the movable guide plate (56).

10. A film scanning device as defined in claim 9, wherein: the rubber sheet meets the condition that the L is more than or equal to A and less than or equal to Acos theta + B, wherein A is the length of the first rubber sheet (29), L is the length of the movable guide plate (56), B is the length of the second rubber sheet (55), theta is the included angle between the movable guide plate (56) and the second inclined guide section (47) when the movable guide plate (56) is in an initial slide state, and theta is more than or equal to 15 degrees and less than or equal to 45 degrees.