TW472157B - Automatic focusing method and device - Google Patents

Abstract

The present invention is an automatic focusing method and device to be used inside a scanner, wherein two sets of transmission motors and transmission devices are used to pull two movable platforms. The two platforms are loaded with a first lens set and a second lens set respectively, and the first lens set and the second lens set are driven by a motor, so as to adjust the distance between the first lens set and the second lens set, which not only has the function of automatic and accurate focusing, but also can simplify the focusing mechanism inside the scanner.

Description

472157 Α7 · ———----____ 5. Description of the invention (/) ~ — (1) Technical field of the invention: The present invention provides a self-focusing method and two sets of independent drive systems for adjusting the first -The distance between the lens group and the second lens group can obtain the precise focus and simplify the structure of the internal focus of the scanner. (II) Background of the invention: Recently, computer technology is growing at a multiple of speed. The function of Qiantai attracts everyone to approach it and use it, especially the popularity of computer peripheral products, which has expanded the scope of computer applications. Among them, the scanner is It is a new rising star of computer peripheral products recently. It can convert graphics and text data into a format that can be recognized by a computer through the principle of optical imaging, and can be stored in a memory unit of a computer. — In general, the image of a scanner Mosquito removal depends on whether the length of the total Tmck (TT) of the device is adjusted to an appropriate position, and ^ after the product is shipped, the code is changed-see 'Figure', Figure-is a conventional scan The scanning structure of the device is not intended, which is a first-rotor u, a second runner I) and a movable pulley 13 each consisting of a steel wire 19 wound around the outer edge in a special way, and then the first runner 11 The steel wire between the moving pulley 丨 3 and 9 is fixed—the first lens group 14 is fixed, the space above the first lens group 14 is fixed—the light source group ^ and fixed on the moving pulley 13—the second Lens group 15, driving a motor 16 for pulling Steel wire 19 moves forward or backward, assuming the first lens U moves to the left by a distance of X, the second lens group b will move to the left because the steel wire w is retracted between each axis point 1 / The distance of 2χ, although the rotation between the first lens group 14 and the second lens group 15 is changed, the total light from the source group 17 to the first lens group 14, the second lens group 15 and the scanning module 18 Cheng (Please read the precautions on the back before filling out this page) Packing ----- · --- Order -------- Printed by the Consumer Cooperatives of the Intellectual Property Bureau of the Ministry of Economic Affairs ^ This paper size applies to China Standard (CNS) A4 specification (210 X 297¾ ^ 472157 --- ~~~~ ------___ B7 „____ V. Description of the invention (>) '' Long ^ (Ca Track, TT) is unchanged, this is The scanning structure of the conventional scanner during production and assembly cannot be adjusted by the motor command to adjust the total optical path length, and the image sharpness cannot be adjusted in one week. Therefore, more production manpower is required to adjust the focus manually to Changing the position of the first lens group 14 or the second lens group 15 (position, not only wastes a lot of production time, but it is not easy to adjust the best image sharpness', so it remains to be seen (3) Brief description of the invention: The auto-focusing method and device of the present invention are improved for the lack of the method of adjusting the focal point, and they hide the scanner _ two sets of transmission systems to separate The first lens group and the second lens group are adjusted. The transmission system includes a motor, a belt, a plurality of wheels, and the like. € The two lens groups can be made to slide on the two-inch lead-in device, and the two lens groups can be fixed to the belt continuously. When the motor is driven and the belt is rotated, only the lens group can be moved forward and backward. Preferably, after the power is turned on, the transmission system moves the first lens group to the position of the reactor, and the scan of the specific test chart (Chart) is started to obtain a print of the consumer cooperative of the Intellectual Property Bureau of the Ministry of Economic Affairs.値 'Then transfer the m group, and according to the scanning module to receive the focal length value different from the best focal length range, after the professional fiber is around, then adjust the focal length. Take 1 ',, distance, &better; the calculation of the optimal focal length range is the calculation of the sales data received by the scanning module, and the output circuit of the second motor is driven based on the calculation result, and the second lens group is driven. Face or back to the maximum

x 297 mm) 472157 Printed by the Consumer Cooperatives of the Intellectual Property Bureau of the Ministry of Economic Affairs A7 B7 V. Description of Invention (;)) The best focal length range. Preferably, the scanning module includes a lens (LENS) and a charge coupled device (CCD) device for sensing and receiving the image of the scanned object. Preferably, two platforms can be installed on each of the two guides, and the first lens group and the second lens group are fixed and can be used for the first lens group and the second lens group to guide a moving direction. By using the self-focusing method and device of the present invention, the conventional technology can effectively improve the lack of focus, and a simplified auto-focusing device is provided instead of a complicated winding device, and it can read the coke and save the accuracy. The method and device of the distance point is to enable your review committee to have a better understanding and understanding of the processing work of the present invention. With the following, detailed description of the invention, and the detailed description of the invention, Yu Xin has some reference work. Help. (IV) Schematic illustration of the invention: Figure 1 is a schematic diagram of the scanning structure of a conventional scanner; Figure 2 is a schematic side sectional structure diagram of the first lens group and the second lens group driven by a motor, respectively; Figure 1 It is a schematic diagram of the three-dimensional appearance of the present invention installed inside a scanner; FIG. 4 is a schematic diagram of the auto-focusing process of the present invention. Explanation of drawing number: 11 The first runner 13 The moving pulley This paper size is applicable to Chinese national standards 12 The second runner 14 The first lens group X 297 mm)

472157 A7 B7 V. Description of the invention (f) 15 Second lens group 16 Motor 1 I 1 17 Light source group 18 Scan module 1 1 1 19 Steel wire n 1 1 I 20 Scanner 21 Please read the first lens group first 1! 22 Brother—Lens Group 23 Scanning Module 1 24 Note for Light Source Group 1 1 31 First Motor 32 Second Runner Intention 1 1 I 33 First Runner 34 First Belt Item Refill I 35 Second Motor 36 Fourth wheel write this page Nw · »Install 1 37 Third wheel 38 Second belt 1 1 1 39 Guide I 1 I 41 Turn on the power 1 1 i 1 42 Move the first lens group to the sensor ( Sensor) position 43 Start scanning for a specific test pattern 1 1 1 44 Move the second lens group and receive the focal length according to the scan module 计算 to calculate 1 1 1 out of the optimal focal length range 1% 45 is the optimal focal length range 1 1 1 46 Focus completed 1 1 50 Control circuit 1 1 Printed by the Consumers ’Agency of the Intellectual Property Bureau of the Ministry of Economic Affairs (5) Detailed description of the invention: The present invention is an autofocus method and device which are provided by two independent drive systems. Don't adjust From the second lens group and the lens group, the total optical path length change (Total Track, TT) to achieve the purpose of adjusting the focal point,

This paper size applies the Chinese National Standard (CNS) A4 specification (210 X 297 mm) 472157 A7 Five invention description (/ This automatic adjustment method can achieve more precision ^ <Focus adjustment 値: Invented device and adjustment focus_ Method ㈣ ^ 歹 ^ As for the illustrations—please refer to the figure for reference—this is the first of the present invention—the structure of the front end of the sound transmission shaft is connected to the first wheel 33, and each of the film sets can be driven by a motor Side view profile of the drive: The lens group and the second lens are printed by the Consumer Cooperative of the Intellectual Property Bureau of the Ministry of Economic Affairs—the motor 31, the runner 33, and the end—the first pickup system; the other—the drive system is the second Motor I: 'Further formation-37 runners, 3 runners in the township, and 3 sets of materials outside the county ^ 3 The second belt 38 "set the other end on the outer edge of the 4th runner brother ::' the bottom of group 21 The end is fixed at a suitable place above the first belt 34. Second, the bottom of the piece group 22 is fixed at a suitable place above the second belt 38, and the belt 34 and the second skin f can also be replaced by a steel wire. In addition, the first lens group of the instrument is provided with a light source group 24, and after the light source :: after an irradiation ' The scanned image is reflected by the first lens group 21 and the second lens group, and a scanning module 23 is used to receive a sensed image. The formed image is the total track length (TT). If the total optical path length is appropriate, an optimal focal length range can be obtained, and a better image sharpness can be adjusted by the autofocus method and device of the present invention. Please refer to FIG. 3 and FIG. 3 at the same time. This is a schematic diagram of the three-dimensional appearance of a scanner installed in the present invention. It can be clearly seen from the figure that two ends of the first lens group 21 and the second lens group 22 are fixed to the two guides inside the scanner 20. Above the device 39, and the fixed positions of the two lens groups and the two guide devices 39 are installed, and the outer edge of the first runner 33 is sleeved on the first belt. The other end of the belt M is sleeved on the second roller. 32: The outer edge of this paper is in accordance with Chinese National Standard (CNS) A4 (210 X 297 mm). Read the notes on the back before filling in this page.) Loading -----.--- Order --- ------- Printed by the Consumer Cooperative of Intellectual Property in the Ministry of Economic Affairs

4Y ^ lbY Fifth, the description of the invention (L) is changed to a platform (not shown in the figure), which can be used for assembly and disassembly of the two lens groups, and corresponds to the appropriateness of the first lens group 21 and the second lens group 22 There are two sensors (not shown in the figure) respectively, and the two sensors (such as a dish) are fixed to the inner wall of the scanner housing. In addition, the first lens group 21 and the second lens group 22 It can be moved forward and backward on the two guiding devices 39 respectively. The bottom of the first lens group 21 is connected above the first belt%; and the bottom of the second lens group 22 1 is connected above the second belt 38. The action of auto-focusing is: after the two sensors detect the positions of the first lens group 21 and the second lens group 22, the two control circuits 50 control the first motor 31 and the second motor% -rotation and connection &amp; Scanning 4 field modules 23 to make-move, the control circuit 50 can be a central processing state (cpu) or-special application integrated circuit (Asic), the two lens group is moved to two sensors (Sens 〇r), used as the initial position to adjust the focus, and start scanning after scanning-specific job map, its scanning After the image is illuminated and reflected by the -light source group 24, it is reflected by the -lens group 21 and the first lens group 22, and the scan module a receives the image and calculates whether it has reached the best image rule. Drive the second lens group 22 to move forward and backward to change the total ^

Tmck, TT), the sharpness of the scanned image can be adjusted. After the judgment is adjusted to the correct and acceptable image sharpness, the focusing device of the present invention completes the adjustment. '' Please refer to Figure 4. Figure 4 is a special diagram of the auto-focusing process of the present invention, in which the scanning module contains-lens (LENs) and _ ^, coupler (CCD), and the lens And the charge light coupler first make ^ focus, and then put the inside of the first-mirror version and the second-mirror version of the scaler, this ------------- install · ---- --- Order --------- Λ4 · .-- (Please read the note on the back? Matters before filling out this page) The M's scale is applicable to the CNS A4 STilo &quot; 297 company %) 472157

5. Description of the invention), when the first lens group and the second lens group are not accurately positioned, the power source 41 is first turned on, and the transmission system moves the first lens group to the sensor (§ens〇r) position 42, That is, to adjust the initial position of the focal length, start scanning 43 on a specific test chart to obtain an image focal length 値, then move the second lens group, and receive the focal length 値 according to the scanning module to calculate the optimal focal length range 44. Test to determine whether it is the optimal focal length range 45. If the result is negative, go back to step 44 to adjust the focal length. When the result is positive, finish the work of adjusting the focus 46; The calculation is that the focal length value received by the scanning module is calculated via a hanging circuit, and according to the calculation result, the control circuit outputs a Hutudi motor and drives the second lens group forward or backward to achieve the optimal focal length range. Q 0 In summary, the structural features and embodiments of the present invention have been disclosed in detail, which fully demonstrates that the present invention is deeply implemented in terms of purpose and efficacy, and has a very high industrial price. At present the market is unprecedented use of, in accordance with the spirit of the patent law, the case of the invention in full compliance with requirements of the patent invention, would like to ask your committee to review public will see, and pray quasi-Hui, is Suozhi prayer. (Please read the precautions on the back before filling out this page) Install ----- * --- Order -------- Printed by the Consumer Property Cooperative of the Intellectual Property Bureau of the Ministry of Economy 2T / c \ Standard A4 I CN-(One standard bidder, one country uses moderate ¾ one paper centimeter 9 2

Claims (1)

472157 Printed by the Employees' Cooperatives of the Intellectual Property Bureau of the Ministry of Economic Affairs (Case No. 0889-No. 7334, _ 胄 Patent Scope Amendment) 1. An autofocusing device, the components of which consist ·· The first lens group, which has more than one lens set inside, is set in the optical path of the scanner to reflect and change the light path; a second lens group 'has more than one lens set inside, which is set at In the optical path of the scanner, it is used to receive the light reflected by the first lens group 'and project the light through more than one reflection to a scanning module; a scanning module receives the image projected by the scanner, and The image is converted into an electronic signal; two transmission systems are used to carry the first lens group and the second lens group, and the first lens group and the second lens group are driven to move forward and backward respectively; two sensors are arranged on the scanner The appropriate place in the interior is used to detect the position of the first lens group and the second lens group inside the scanner; and, — the guide device is connected to the first lens group and the second lens group, and can be used for the second lens group Guiding a moving direction. 2 The auto-focusing device as described in item 1 of the scope of patent application, the transmission system includes:-a first belt, sleeved on the outer edges of the first and second runners, and driven by-a first motor A second belt is placed on the outer edges of the third and fourth runners and is driven by a second motor. The first runner is set at one end inside the first belt, which makes the leather when rotated ▼ Make a forward or backward rotation; a younger brother turns a wheel, and is placed on one end of the younger brother's belt. When it rotates, the leather and family scales are turned over to close the house? T5 &quot; ns> a4 Specification First &quot; ---- ----- I ---- II -------- Order ----------- (Please read the back one first (Please fill in this page again) Scope of patent application: The consumer cooperative of the Intellectual Property Bureau of the Ministry of Economic Affairs prints the belt for one forward or backward rotation;-the third wheel is set at the end of the second belt, and when it rotates, the belt makes one forward or backward rotation Rotate; a fourth runner 'is set at one end of the second belt, and its rotation_the belt makes a forward or backward rotation; a second motor, whose butt end extension shaft passes through the station of a first runner and drives the first A lens group makes a forward and backward movement; and,-a second motor whose front view extension shaft is put on the axis of the third wheel, and drives a lens group to make a forward and backward movement. 3 If the scope of patent application is the first! In the auto-focusing device according to item 2 or item 2, the bottom of the first lens group is fixed above the first belt. If you apply for a special device as described in item 1 or item 2, the second lens part is fixed above the second belt. 5. As for the auto-focusing device described in item 2 of the scope of the patent application, the first and second belts can be replaced by steel wires, and the device is achieved. 6. The auto-focusing device described in item 1 of the scope of patent application, the scanning module includes a lens (LENS) and a charge coupled device (CCE)). 7. The automatic focusing device as described in item 1 of the scope of the patent application, there are two platforms above the two guide devices for the first lens group and the second lens group to be set between the two guide devices. . Brother 8 The auto-focusing device described in item 1 of the scope of patent application, wherein the first lens group is further provided with a light source group. Λ 9 An automatic focusing method, which is matched with—the autofocus device is made—the paper size of the wall Gu + the national standard (CNS) A4 specification (210 X 29 / male f) ----------- --------- Order ------------% (Please read the notes on the back before filling this page) 4 i iC I Ο ^ The scope of the patent application is printed by the Consumer Cooperative of the Intellectual Property Bureau of the Ministry of Economic Affairs. And two guide bow 丨 devices, the steps of which are: (a) start the power supply; ⑻ move the first lens group to the sensor (Sensoi ·) position; (c) start a scan on a specific test chart (chart); ⑷ Move the group and receive the focal length value to calculate the optimal focal length range according to the reduction group; (e) whether it is the optimal focal length range; (f) complete the focusing. 10 An automatic method such as the one applied for in the patent application, wherein the calculation of the optimal focal length plane is the calculation of the focal length value received by scanning through a control circuit. The method of autofocusing described in item 9 of the U-Range, in which the calculation result is output by the control circuit _ 作 垆 筮 _ mm &quot; Brother-motor, and drives the second lens, and do not advance or retreat to achieve the best focus range. 12 2 Please __ 9 The method of autofocus lying down, in which if the result of step ⑷ is negative, then execute 1 ”: Please refer to item 9 of the patent scope (the method of step 二 in the second and second job line. Female The self-control circuit described in item 10 of the Ming Ming patent is a central processing unit (CPU) ',,,,,', 'of which 15', please outline the self-control circuit described in item H). This is a special application integrated circuit (Aslf) in China II scale ruler China ------- II ^ II ----- I n »----- line {Please read the precautions on the back before filling this page )