CN2449292Y - Image scanning device with reflective and transmissive scanning optical path switching mirror - Google Patents

Abstract

The utility model relates to an image scanning device makes the switching lens comparatively simple convenient and practical. The traveling module comprises a reflection type optical path fixed lens, a transmission type optical path fixed lens, a first focusing lens, a second focusing lens, an image capturing module and a rotatable reflecting lens, wherein the first focusing lens and the second focusing lens are respectively provided with a light source incidence end and a light source emergence end, the image capturing module is arranged at a position with a distance from the light source emergence ends of the first focusing lens and the second focusing lens, and the rotatable reflecting lens can be rotatably positioned at a first angle or a second angle. For scanning.

Description

Image scanning device with reflective and transmissive scanning optical path switching mirror

The utility model relates to an image scanning device.

Existing reflective image scanners are shown in Figures 1 and 2: a rectangular window is opened in the center of the top plate 11 of its body 1, and a manuscript bearing surface 12 of transparent glass is embedded to place the manuscript 10. One side of the top surface of the body 1 An upper cover 13 is pivotally arranged as a photomask board. During operation, the upper cover 13 covers the manuscript bearing surface 12 of the manuscript 10 . There is a traveling module 14 and guide rods 15a, 15b in the body. The traveling module 14 has a bottom light source 16, several reflecting mirrors 171, 172, 173, 174, a focusing lens 18 and an image capturing module 19. Driven by a control circuit and a driving mechanism, the traveling module 14 moves along the guide rods 15a, 15b to scan. The existing penetrating image scanner is shown in Figures 3 and 4: it has a body 2, a top plate 21, and a manuscript bearing surface 22, and a backlight module 23 is pivotally arranged on one side of the top surface of the body 2, which includes a backlight light source 26 . There is a traveling module 24 , guide rods 25 a , 25 b inside the body. The traveling module 24 has reflective lenses 271 , 272 , 273 , a focusing lens 28 and an image capturing module 29 . The traveling module 24 is driven to move along the guide rods 25a, 25b, and cooperates with the light source of the backlight light source 26 to perform scanning. This kind of image scanner can only scan in a single reflective or penetrating mode, and cannot be switched. Although the No. 391604 patent has designed a switching function, the structure is complex. It is equipped with a light-shielding sheet in front of the focusing lens, and the light-shielding sheet is switched by a switching mechanism. During reflective scanning, the focusing lens in the penetrating optical path is covered; During transmissive scanning, the focusing lens in the reflective optical path is covered, and the structure is complex and impractical.

The purpose of the utility model is to provide a simple, convenient and practical image scanning device with reflective and penetrating scanning optical path switching mirrors.

The purpose of this utility model is achieved in the following way: an image scanning device with reflective and penetrating scanning optical path switching lenses is equipped with a moving module, which is characterized in that: the moving module cooperates with a bottom light source or a backlight A light source, and the moving module contains first and second focusing lenses, an image capture module and a rotatable mirror; the first and second focusing lenses have a light source incident end and a light source output end respectively; image capture The module is arranged at a distance from the light source exit ends of the first and second focusing lenses, and the rotatable reflective lens can be rotated and positioned at the first angle or at the second angle; it also includes a reflective fixed optical path lens, and is connected with the first The focusing lens and the rotatable reflective mirror jointly form a reflective optical path; it also contains a penetrating optical path fixed mirror and forms a penetrating optical path together with the second focusing lens and the rotatable reflective mirror.

In the above design, the bottom light source is used for image scanning of a reflective manuscript placed on the image scanning device; the backlight light source is used for image scanning of a penetrating manuscript. When scanning reflective manuscripts, the rotatable reflective lens is positioned at the first angle, so that the light path generated by the bottom light source reflects and projects the reflective manuscript to be scanned onto the rotatable reflective lens, and then fixed by the reflective optical path Reflected by the lens, it is projected to the light source incident end of the first focusing lens, and then the image signal of the reflective manuscript is projected to the image capture module from the light source exit end of the first focusing lens; and when scanning the transmissive manuscript, The rotatable reflective mirror is positioned at the second angle, so that the light generated by the backlight light source is projected to the rotatable reflective mirror through the transmissive document to be scanned, and then projected to the second The light source incident end of the focusing lens, and then the light source output end of the second focusing lens projects the image signal of the transmissive manuscript to the image capture module, so that switching is simple, convenient and practical.

Below by accompanying drawing, embodiment illustrate again:

Fig. 1 is a three-dimensional appearance diagram of an existing reflective image scanning device;

Fig. 2 is a schematic diagram of the optical path of the existing reflective image scanning device;

Figure 3 is a three-dimensional appearance diagram of an existing penetrating image scanning device;

Fig. 4 is a schematic diagram of the optical path of the existing penetrating image scanning device;

Fig. 5 is a schematic diagram of the configuration of the internal components of the travel module of the utility model;

Fig. 6 is a schematic diagram of the optical path when the utility model scans a reflective manuscript;

Fig. 7 is a schematic diagram of the optical path when the utility model scans the penetrating manuscript;

Fig. 8 is a perspective view of the combination of the rotatable reflective mirror and the rotary driving device of the utility model.

As shown in Figure 5-7: the utility model is equipped with a travel module 3, which is characterized in that: the travel module 3 cooperates with a bottom light source 30 or a backlight light source 6, and the travel module 3 contains the first, Two focusing lenses 32, 33, an image capture module 31 and a rotatable mirror 8; the first and second focusing lenses 32, 33 respectively have a light source incident end 32a, 33a and a light source output end 32b, 33b; The image capture module 31 is arranged at a distance from the light source exit ends 32b, 33b of the first and second focusing lenses 32, 33, and the rotatable mirror 8 can be rotated and positioned at a first angle or at a second angle; The reflective optical path fixed mirrors 71, 72 form a reflective optical path together with the first focusing lens 32 and the rotatable reflective mirror 8; The lens 33 and the rotatable reflective mirror 8 jointly form a penetrating optical path. The moving module 3 can move below the manuscript carrying surface 4 along two parallel guide rods. The manuscript carrying surface bears a manuscript 5 to be scanned, and the backlight light source 6 is arranged inside the backlight module. In this way, the bottom light source 30 is used to perform image scanning on a reflective manuscript 5a placed on the image scanning device; the backlight light source 6 is used to perform image scanning on a transmissive manuscript 5b. When scanning the reflective manuscript 5a, the rotatable reflective mirror 8 is positioned at a first angle, so that the light path generated by the bottom light source 30 reflects and projects the reflective manuscript 5a to be scanned onto the rotatable reflective mirror 8, and then is reflected The light source incident end 32a of the first focusing lens 32 is projected to the light source incident end 32a of the first focusing lens 32 by the reflection of the optical path fixed mirrors 71 and 72, and then the image signal of the reflective manuscript 5a is projected to the image capture module by the light source output end 32b of the first focusing lens 32. Group 31; and when performing transmissive manuscript scanning, the rotatable reflective mirror 8 is positioned at a second angle, so that the light generated by the backlight light source 6 is projected onto the rotatable reflective mirror 8 via the transmissive manuscript 5b to be scanned , and then projected to the light source incident end 33a of the second focusing lens 33 by the reflection of the transmissive optical path fixed mirrors 73, 74, and then the image signal of the transmissive manuscript 5b from the light source output end of the second focusing lens 33 is projected to The image capture module 31 achieves the effect that switching is relatively simple, convenient and practical. Wherein, the image capture module 31 includes a charge-coupled device (CCD).

As shown in Figures 7 and 8: wherein, the rotatable reflective mirror 8 is combined with a rotary driving device 81 by a transmission shaft 80, with the transmission shaft 80 as the center of rotation, and can be positioned at the first or second angle , The rotary drive device 81 is equipped with position detection switches 91, 92 to control the angle of rotation positioning; wherein, the rotary drive device 81 is a stepper motor. Wherein, the rotatable reflective mirror 8 is located below the backlight source 6; wherein, the first focusing lens 32 and the second focusing lens 33 are focusing lenses with different optical resolutions, so that when scanning, the obtained different resolutions required.

Claims (6)

1. An image scanning device with reflective and transmissive scanning optical path switching mirrors, which is equipped with a travel module, which is characterized in that: the travel module cooperates with a bottom light source or a backlight light source, and the travel module contains The first and second focus lenses, an image capture module and a rotatable mirror; the first and second focus lenses have a light source incident end and a light source output end respectively; the image capture modules are arranged on the first and second There is a distance from the light source exit end of the focusing lens, and the rotatable reflective lens can be rotated and positioned at the first angle or at the second angle; it also includes a reflective fixed optical path lens, and is connected with the first focusing lens and the rotatable reflective lens Together form a reflective optical path; it also contains a penetrating optical path fixed lens and forms a penetrating optical path together with the second focusing lens and the rotatable reflective mirror. 2. The image scanning device according to claim 1, wherein the image capture module includes a charge-coupled device. 3. The image scanning device as claimed in claim 1, wherein the rotatable mirror is combined with a rotatable driving device via a transmission shaft. 4. The image scanning device as claimed in claim 3, wherein the rotation driving device is a stepping motor. 5. The image scanning device as claimed in claim 1, wherein the rotatable reflective mirror is located below the light source corresponding to the backlight. 6. The image scanning device as claimed in claim 1, wherein the first focusing lens and the second focusing lens are focusing lenses with different optical resolutions.

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