CN203813851U - Specific wavelength scanning device - Google Patents

Abstract

A specific wavelength scanning device includes a lens group, a filter, and an image sensing module. The lens group is used to converge an image light generated by irradiating an object with a light, wherein the lens group includes at least two lenses, and the optical axes of the lenses are parallel to each other; the filter is arranged on a light-incoming side or a light-outgoing side of the lens group, and is used to filter the image light so that the image light includes a narrower wavelength range; the image sensing module is arranged on the light-outgoing side of the lens group, and is used to receive the image light converged by the lens group and form an image signal. Through the arrangement of the filter, the wavelength range of the image light can be more accurately limited to obtain an image signal of a specific wavelength range; and there is no need to additionally coat the lens group, which reduces the technical difficulty and the manufacturing and purchasing costs.

Description

Specific wavelength scanning device

technical field

The utility model relates to a scanning device, in particular to a specific wavelength scanning device.

Background technique

In the industry, scanning technology is often used to inspect the defects of products. For example, after using X-rays to irradiate steel to obtain X-ray negatives, a scanner is used to scan the X-ray negatives to obtain images, thereby judging the internal structure and quality of steel. In some situations, it is necessary to obtain more accurate judgment results by comparing images in different wavelength ranges; traditionally, to obtain images in a specific wavelength range, it is necessary to coat the lens group of the scanning device with a filter film to limit the image The wavelength range of light achieves the filtering effect. However, the technology of coating on the lens has a certain technical threshold, which is relatively cumbersome and complicated; if the coated lens group is purchased from a professional coating manufacturer, the cost will be greatly increased and it is not easy to customize.

In addition, the way of coating on the lens group cannot precisely limit the image light to a wavelength range. For example, if you want to limit the image light to the red wavelength range, it may overlap with some light in other wavelength ranges.

Therefore, it is an urgent goal to develop a scanning device that has a low technical threshold and can effectively limit image light to a specific wavelength range.

Utility model content

The utility model provides a specific wavelength scanning device, through the setting of the optical filter, the wavelength range of the image light can be more accurately limited, and the image signal of the specific wavelength range can be obtained; and there is no need to additionally coat the lens group, The technical difficulty and the manufacturing and purchasing costs are reduced.

According to an embodiment of the present invention, a specific wavelength scanning device includes a light source, a lens group, a filter and an image sensing module. The lens group is used for converging an image light generated by a light irradiating an object, wherein the lens group includes at least two lenses, and the optical axes of the lenses are parallel to each other; the filter is arranged on a light-incoming side or a light-outgoing side of the lens group The side is used to filter the image light so that the image light contains a narrower wavelength range; the image sensing module is arranged on the light output side of the lens group to receive the image light converged by the lens group and form an image signal.

Preferably, it is characterized in that the filter crosses a light incident side or a light exit side of each lens of the lens group.

Preferably, it is characterized in that it further includes a light source, wherein the light source is used to generate light.

Preferably, it is characterized in that the light source includes a light emitting diode or a cold cathode fluorescent lamp.

Preferably, the feature is that the light source and the image sensing module are arranged on the same side of the object, and the image sensing module receives the image light reflected or generated by the object.

Preferably, the feature is that the light source and the image sensing module are disposed on different sides of the object, and the image sensing module receives the image light transmitted through the object.

Preferably, it is characterized in that the lens group includes a rod lens.

Preferably, it is characterized in that it further includes a driving module, which is used to drive the image sensing module and the object to move relative to each other, so that the image sensing module scans the object.

Preferably, it is characterized in that the driving module includes a stepping motor.

Preferably, it is characterized in that it further includes an image processing module electrically connected to the image sensing module for processing image signals.

Preferably, the image sensing module includes a contact image sensor.

In the following, detailed descriptions will be given through specific embodiments in conjunction with the accompanying drawings, so that it will be easier to understand the purpose, technical content, features and effects of the present utility model.

Description of drawings

FIG. 1 is a schematic structural diagram of a specific wavelength scanning device according to an embodiment of the present invention.

FIG. 2 is a schematic structural diagram of a specific wavelength scanning device according to another embodiment of the present invention.

FIG. 3 is a schematic structural diagram of a specific wavelength scanning device according to another embodiment of the present invention.

FIG. 4 is a schematic structural diagram of a specific wavelength scanning device according to another embodiment of the present invention.

FIG. 5 is a schematic structural diagram of a specific wavelength scanning device according to another embodiment of the present invention.

Symbol Description:

1 Specific wavelength scanning device

10 light sources

20 lens group

21 lens

30 filter

40 image sensing module

50 drive module

60 image processing module

O object

Detailed ways

Please refer to FIG. 1 and FIG. 2 . FIG. 1 and FIG. 2 are structural schematic diagrams of specific wavelength scanning devices according to different embodiments of the present invention. The specific wavelength scanning device 1 includes a lens group 20 , a filter 30 and an image sensing module 40 . The lens group 20 is used for converging an image light generated by a light irradiating an object O, wherein the lens group 20 includes at least two lenses 21, and the optical axes of the lenses 21 are parallel to each other; the filter 30 is arranged on the lens group 20 A light incident side (as shown in FIG. 1 ) or a light exit side (as shown in FIG. 2 ) is used to filter the image light so that the image light L becomes light with a wavelength range. The image sensing module 40 is disposed on the light emitting side of the lens group 20 for receiving the image light converged by the lens group 20 and forming an image signal. Therefore, the image signal obtained by the specific wavelength scanning device 1 has a narrow wavelength range. In addition, the specific wavelength scanning device 1 may further include a light source 10 (as shown in FIG. 1 and FIG. 2 ), wherein the light source 10 is used to generate light to irradiate the object O and generate image light. In addition, light can also be generated by natural light sources.

Please refer to FIG. 1 and FIG. 2 again. In one embodiment, the filter 30 crosses a light incident side ( FIG. 1 ) or a light exit side ( FIG. 2 ) of each lens 21 of the lens group 20 . In other words, the scanning device 1 only needs to have one optical filter 30 , and each lens 20 of the specific wavelength scanning device 1 can share the optical filter 30 to obtain an image signal in a single wavelength range. For example, the filter 30 can limit the wavelength range of the image light to an interval with a wavelength difference of 50 nm.

Please refer to FIG. 1 and FIG. 2 again. In one embodiment, the image sensing module 40 includes a contact image sensor (CIS). CIS is a type of linear sensor used to scan documents, images, etc. into electronic formats for storage and utilization. When scanning, objects can be scanned one by one to obtain multiple linear images. Finally, after image processing, a complete image can be formed. The advantage is that the CIS is light and thin and easy to assemble, so the utility model can easily integrate the filter into the CIS module to achieve the filtering effect and replace the complex coating process, saving cost and low technical threshold.

In one embodiment, the lens group 20 includes a rod lens. Rod lens (or cylindrical lens) has the advantage of short optical path and can be used as a light and thin component, so it is usually used to match CIS.

Please refer to FIG. 1 and FIG. 2 again. In one embodiment, the light source 10 can be a light emitting diode or a cold cathode fluorescent lamp (cold cathode fluorescent lamp, CCFL).

In addition, the specific wavelength scanning device 1 of the present invention can be applied to penetrating manuscripts or reflective manuscripts. As shown in FIG. 1 and FIG. 2 , in one embodiment, the light source 10 and the image sensing module 40 are arranged on different sides of the object O (transmissive draft), and the image sensing module 40 receives the light of the transmissive object O. image light. In another embodiment, please refer to FIG. 3 and FIG. 4, the specific wavelength scanning device 1 shown in FIG. In the device 1, the optical filter 30 is arranged on a light-emitting side of the lens group 20, and the light source 10 and the image sensing module 40 of both are arranged on the same side of the object O (reflective manuscript), and the image sensing module 40 receives Image light reflected by object O.

In addition, please refer to FIG. 5 , in one embodiment, the specific wavelength scanning device 1 further includes a driving module 50, which is used to drive the image sensing module 40 and the object O to move relative to each other, so that the image sensing module 40 scans the object. object, and obtain a scanned image. For example, the drive module may include a stepper motor and may be coupled with a roller module.

Please refer to FIG. 5 again. In one embodiment, an image processing module 60 is further included, which is electrically connected to the image sensing module 40 for processing image signals. For example, the image processing module may include a computer software. With the assistance of the computer software, the image signal can be adjusted, stacked, divided or merged to obtain the desired image.

Based on the above, the utility model provides a specific wavelength scanning device, through the setting of the optical filter, the wavelength range of the image light can be more accurately limited, and the image signal of a specific wavelength can be obtained; and no additional lens group Coating reduces the technical difficulty and the cost of manufacturing or purchasing.

The embodiments described above are only to illustrate the technical ideas and characteristics of the present utility model, and its purpose is to enable those skilled in this art to understand the content of the present utility model and implement it accordingly, and should not limit the scope of the present utility model The scope of the patent, that is, all equivalent changes or modifications made according to the spirit disclosed by the utility model should still be covered by the patent scope of the utility model.

Claims (11)

1. a specific wavelength scanning means, is characterized in that, comprises:

One set of lenses, it irradiates via a light image light that an object produces in order to assemble, and wherein this set of lenses comprises at least two lens, and the optical axis of these at least two lens is parallel to each other;

One filter, it is arranged at a light inlet side or a bright dipping side of this set of lenses, in order to filter this image light, makes this image light comprise narrower wave-length coverage; And

One image sensing module, it is arranged at this bright dipping side of this set of lenses, in order to receive this image light of assembling through this set of lenses and to form a signal of video signal.

2. specific wavelength scanning means as claimed in claim 1, is characterized in that, this filter is across a light inlet side or a bright dipping side of each these lens of this set of lenses.

3. specific wavelength scanning means as claimed in claim 1, is characterized in that, more comprises a light source, and wherein this light source is in order to produce this light.

4. specific wavelength scanning means as claimed in claim 3, is characterized in that, this light source comprises a light-emitting diode or cold cathode fluorescent lamp.

5. specific wavelength scanning means as claimed in claim 3, is characterized in that, this light source and this image sensing module are arranged at the same side of this object, and this image sensing module receives this image light through this object reflection or generation.

6. specific wavelength scanning means as claimed in claim 3, is characterized in that, this light source and this image sensing module are arranged at the phase heteropleural of this object, and this image sensing module receives this image light of this object of transmission.

7. specific wavelength scanning means as claimed in claim 1, is characterized in that, this set of lenses comprises a rod lens.

8. specific wavelength scanning means as claimed in claim 1, is characterized in that, more comprises a driver module, and it is in order to drive this image sensing module and this object to move relative to each other, so that this image sensing module scans this object.

9. specific wavelength scanning means as claimed in claim 8, is characterized in that, this driver module comprises a stepper motor.

10. specific wavelength scanning means as claimed in claim 1, is characterized in that, more comprises:

One image processing module, itself and this image sensing module is electrically connected, in order to process this signal of video signal.

11. specific wavelength scanning means as claimed in claim 1, is characterized in that, this image sensing module comprises a contact-type image sensing device.