TW201801668A - External dual-lens module and image chpturing system thereof - Google Patents

Abstract

Disclosed is an external dual-lens module and an image capturing system thereof, which is suitable to be connected to a single-lens image capture device to produce three-dimensional images. The external dual-lens includes: a first lens and a second lens which are different angles to observe an object, a relay imaging element which disposed behind the lens, so that the object which observed by the first lens and the second lens of the external dual-lens can be formed into a first image and a second image at a different position of the relay imaging element, and a housing is covered the external dual-lens and the relay imaging element.

Description

External double lens module and image capturing system thereof

The invention relates to an external double lens module, in particular to a double lens module which is suitable for a single lens image capturing device to generate a stereo image.

Generally, the minimally invasive endoscopes are mostly single-lens endoscopes. However, most single-lens endoscopes can only display 2D images. Therefore, for surgeons, it is often necessary to rely on movement to obtain parallax. The depth of the image is obtained by indirect comparison, or by the inheritance of experience to achieve the accuracy of the target depth coordinate.

Therefore, in order to solve this problem, the best implementation method is to use a dual optical endoscope (double lens) endoscope that can obtain 3D images. However, such endoscopes are inexpensive and have poor popularity.

In view of the above-mentioned problems, the object of the present invention is to provide an external dual lens module for solving the shortcomings of the conventional endoscope.

According to the purpose of the present invention, an external dual lens module is provided, which is suitable for being connected to a single-lens image capturing device to generate a stereoscopic image, which has an external double lens, a relay imaging component and a cover; wherein, the external dual lens It is used to observe an object, and includes a first lens and a second lens to respectively observe the object from different perspectives; the relay imaging component is disposed behind the external double lens, so that the first lens and the second lens of the external dual lens The observed object forms a first image and a second image at different positions on the relay imaging original; and the cover encloses the external dual lens and the relay imaging element.

Preferably, the left and right lenses are wide-angle lenses with a field of view greater than 80°.

Preferably, the relay imaging element is an optical diffuser.

Preferably, the external dual lens module further comprises a light guiding component for guiding the light source to the external double lens for illumination.

Preferably, the outer cover does not cause biocompatibility after contact with the human body.

Preferably, the external dual lens module further comprises a protective mirror, which is a light transmissive structure, and is disposed before the external double lens to cover the outer cover and the external double lens front end.

Preferably, the protective mirror does not cause biocompatibility after contact with the human body.

According to the purpose of the present invention, a dual-lens image capturing system is provided, which comprises the above-mentioned external double lens module and a single lens image capturing device, which comprises a single lens, an image capturing unit and a processor. The single lens is used to observe the first image and the second image on the relay imaging component; the image capturing unit is disposed on the optical path behind the single lens to convert the first image and the second image into an image electrical signal; The processor is connected to the image capturing unit, receives the image signal, and generates a stereo image signal according to the first image and the second image in the image signal.

Preferably, the single-lens image capturing device is an endoscope, and the single lens is disposed at the image capturing end of the endoscope, and the diameter of the outer lens of the external double lens module is larger than the diameter of the image capturing end to be externally attached. The dual lens module is sleeved on the image capturing end.

Preferably, the single-lens image capturing device further comprises a light projecting component disposed at the image capturing end to provide an illumination light source, and the position of the light guiding component is corresponding to the position of the light projection component, and the illumination light source is guided to the external double The lens module is illuminated before.

According to the present invention, the external dual lens module and the image capturing system thereof have one or more of the following advantages:

(1) The external double-lens module of the present invention and the image capturing system thereof can be combined with the single-lens endoscope of the mainstream of minimally invasive surgery to achieve the effect of establishing the in-vivo mirror.

(2) The external double-lens module of the present invention and the image capturing system thereof are mainly composed of a single-lens endoscope which is mainly used in the minimally invasive surgery, and can directly use the existing equipment, thereby having an advantage in cost.

The technical features, contents, and advantages of the present invention, as well as the advantages thereof, can be understood by the present inventors, and the present invention will be described in detail with reference to the accompanying drawings. The subject matter is only for the purpose of illustration and description, and is not necessarily the true proportion and precise configuration after the implementation of the present invention. Therefore, the scope and configuration relationship of the attached drawings should not be interpreted or limited. First described.

The embodiments of the external dual-lens module according to the present invention will be described below with reference to the related drawings. For ease of understanding, the same components in the following embodiments are denoted by the same reference numerals.

Please refer to FIG. 1 to FIG. 4, which are front view, rear view, exploded view and relay optical path of the relay element according to an embodiment of the present invention, respectively. As shown, the external dual lens module of the present invention comprises an external dual lens, a relay imaging element 15, and a housing 14, wherein the housing 14 encloses the external dual lens and relay imaging element 15 therein.

Generally, when the operation is performed, the external double lens can be set on the image capturing end 23 of the single lens endoscope, and an object is observed by using the first lens 11 and the second lens 12 included in the external double lens. Since the first lens 11 and the second lens 12 of the external dual lens respectively observe objects at different viewing angles, the first image 31 and the second image 32 having different angles of view and depth are respectively generated, but the first observed The image 31 and the second image 32 need to have an imaging element to be captured or viewed by the naked eye.

Therefore, referring to FIG. 4, in the present embodiment, when an object A is observed by using the first lens 11 and the second lens 12, the first image 31 and the second image 32 are disposed on the first lens 11 and the first lens. The different positions on the relay imaging original 15 at the rear of the second lens 12 form an image that can be captured upside down, the left and right opposite first image 31 and second image 32, and then received by the single lens 22. Of course, more complex lenses can be designed as needed to make the image a positive image when the imaging element 15 is imaged.

Referring to FIG. 1 to FIG. 3 , according to an embodiment of the present invention, the first lens 11 and the second lens 12 are both wide-angle lenses, and the field of view is greater than 80°. Generally speaking, the larger the field of view, the object can be observed. The wider the range, and the case where the field of view is greater than 80°, the surgeon can more accurately cut the knife in the area to be treated, and the lens of the first lens 11 and the second lens 12 According to actual needs, it can be selected as a spherical lens, a Fresnel lens or other lens that can achieve similar effects or a combination of the above lenses.

Referring to FIG. 5, in accordance with an embodiment of the present invention, the relay imaging element 15 is an optical diffusion sheet that softens and homogenizes the image generated by the first lens 11 and the second lens 12, In order to facilitate subsequent image processing.

The optical diffuser of the present invention is fabricated by a glass etching or semiconductor etching process. The method is to use an etching process on the light-transmitting substrate 151, such as glass, to fabricate the microstructure 152 thereon so that the light can be uniformly diffused.

As shown in FIG. 5, after the light L passes through the imaging element 15, the light L is diffused as the light LL due to the microstructure 152 of the process, so that the image is imaged on the relay imaging element 15, Finally, it can be received by the single lens 22 to obtain an image with uniform brightness.

Referring to FIG. 1 to FIG. 3 , in the external double-lens module of the present invention, the outer cover 14 and the protective mirror 16 are not incompatible with the human body, and the protective mirror 16 is transparent. The structure is disposed before the external double lens to cover the outer cover 14 and the external double lens front end.

Please refer to FIG. 6 to FIG. 8 , which are respectively a schematic diagram of assembly of components according to an embodiment of the present invention, a schematic diagram of assembly of an overall system, and a schematic diagram of stereoscopic image synthesis. As shown in the figure, the external dual-lens image capturing system 30 has a single-lens image capturing device 20 and an external dual-lens module 10, wherein the single-lens image capturing device 20 includes a single lens 22 and an image capturing unit 21 , processor 24.

When the external dual-lens image capturing system 30 of the present invention is used, the external dual lens module 10 can be combined with the single-lens image capturing device 20 by a snap, a fastening, and a rotation, but is not limited thereto. this. Thereafter, the single lens 22 of the single-lens image capturing device 20 is used to observe the first image 31 and the second image 32 on the relay imaging element 15, and the image capturing unit 21 disposed behind the single lens 22 is capturing The first image 31 and the second image 32 are converted into image signal signals, and then received by the processor 24 connected to the image capturing unit 21 to receive image signal signals, such as image flipping and distortion. Correction, image segmentation, contrast, and color saturation adjustment, etc., ultimately produce a stereoscopic image 33. For example, when the first image 31 and the second image 32 are reversed to the left and right as described above, the captured image must be inverted into a forward image by image processing, and then turned into a forward first image 31. And the second image 32 is processed into a 3D image signal for subsequent presentation by the 3D image display device.

The single-lens image capturing device 20 is an endoscope, the single lens 22 is disposed on the image capturing end 23 of the endoscope, and the diameter of the outer cover 14 of the external dual lens module 10 is larger than the diameter of the image capturing end 23 The outer double lens module 10 is sleeved on the image capturing end 23.

For example, in general, the diameter of the laparoscopic minimally invasive surgery is 10 mm, and the diameter of the external double-lens module 10 of the present invention is about 2.2 mm in diameter compared with the diameter of the laparoscope, so that it can be placed on the laparoscope and can be Both are placed in the cannula used in general surgery for surgery, so existing surgical instruments can be used without additional changes. In the external double-lens module 10 and the two eyes of the human body, the first image 31 and the second image 32 observed by the first lens 11 and the second lens 12 are processed to obtain a stereo image 33.

In other words, the external dual lens module 10 of the present invention can have a larger field of view than a single lens of the same situation because it has a dual lens. The first lens 11 and the second lens 12 of the external dual lens module 10 of the present invention are all wide-angle lenses, and the field of view is greater than 80°, so if the matching is appropriate, the field of view of the final field of view can be greater than 80°. ,

Please refer to FIG. 4 and FIG. 6 , wherein the single-lens image capturing device 20 further includes a light projection component disposed on the image capturing end 23 to provide an illumination source, and the position of the light guiding component 13 is corresponding to the light projection component. The position is to guide the illumination source 25 to the external dual lens module 10 for illumination.

For example, in general, a single-lens endoscope has a light source 25 for illumination. There are usually two common configurations. One is that the light-free component is directly disposed in front of the single lens 22, so that the light source 25 directly penetrates. After the light source 25 is used as the single lens 22, the light source 25 is guided to the front of the single lens 22 via the light guiding element such as the light guiding element 13, so if the external double lens module of the present invention is placed in front When the light source of the single lens endoscope is exported to the front of the external double lens module 10 of the present invention, the light source is used as a light source, and the light source is exported in two aspects to avoid the image in the external double lens module 10. Conduction is affected by light that is not derived from a single lens endoscope.

In addition, the light guiding element 13 can be made of optical fiber, glass fiber or the like, and can be actively illuminated by LED or other lighting device as needed.

The above is intended to be illustrative only and not limiting. Any equivalent modifications or alterations to the spirit and scope of the invention are intended to be included in the scope of the appended claims.

10‧‧‧External double lens module
11‧‧‧ first shot
12‧‧‧second lens
13‧‧‧Light guiding elements
14‧‧‧ Cover
15‧‧‧Relay imaging originals
151‧‧‧Transparent substrate
152‧‧‧Microstructure
16‧‧‧protective mirror
20‧‧‧Single lens image capture device
21‧‧‧Image capture unit
22‧‧‧ single lens
23‧‧‧Image terminal
24‧‧‧ Processor
25‧‧‧Light source
30‧‧‧External dual lens image capture system
31‧‧‧ first image
32‧‧‧Second image
33‧‧‧3D image
A‧‧‧ objects
L, LL‧‧‧ rays

1 is a front elevational view of an external dual lens module in accordance with an embodiment of the present invention.

Figure 2 is a rear view of the external dual lens module in accordance with an embodiment of the present invention.

Figure 3 is an exploded view of the externally mounted dual lens module in accordance with an embodiment of the present invention.

Figure 4 is a diagram showing the optical path of the relay element of the external dual-lens module according to the embodiment of the present invention.

Figure 5 is a schematic diagram of a relay imaging element of an external dual lens module in accordance with an embodiment of the present invention.

Fig. 6 is a schematic view showing the assembly of parts of the external double lens pickup system according to the embodiment of the present invention.

Figure 7 is a schematic diagram showing the overall system assembly of a two-lens image capturing system according to an embodiment of the present invention.

FIG. 8 is a schematic diagram of stereoscopic image synthesis of a two-lens image capturing system according to an embodiment of the present invention.

10‧‧‧External double lens module

11‧‧‧ first shot

12‧‧‧second lens

13‧‧‧Light guiding elements

14‧‧‧ Cover

15‧‧‧Relay imaging originals

16‧‧‧protective mirror

20‧‧‧Single lens image capture device

21‧‧‧Image capture unit

22‧‧‧ single lens

24‧‧‧ Processor

Claims (8)

An external dual-lens module for connecting to a single-lens image capturing device for generating a stereoscopic image, the external dual-lens module comprising: an external dual lens for observing an object, the plug-in The dual lens includes a first lens and a second lens, wherein the first lens and the second lens respectively observe the object at different viewing angles; a relay imaging component is disposed behind the external double lens to make the external dual lens The first lens and the object observed by the second lens form a first image and a second image at different positions on the relay imaging original; and a cover, the cover doubles the external lens and the relay The imaging element is coated therein. The double-lens module of claim 1 is the wide-angle lens, wherein the first lens and the second lens are wide-angle lenses, and the field of view (FOV) is greater than 80°. The external dual lens module of claim 1, wherein the relay imaging component is an optical diffusion sheet. The external double-lens module as described in claim 1 further includes a light guiding component for directing a light source to the external double lens for illumination. The external dual-lens module of claim 1 further includes a protective mirror, which is a light transmissive structure, and is disposed before the external double lens to cover the outer cover and the external double lens front end. An external dual-lens image capturing system comprising: a double-lens module mounted as in any one of claims 1 to 5; and a single-lens image capturing device comprising: a single lens, an observation The image capturing unit is disposed on the optical path of the single lens to convert the first image and the second image into an image electrical signal. And a processor connected to the image capturing unit to receive the image signal and generate a stereo image signal according to the first image and the second image in the image signal. The external lens-mounted dual-lens image capturing system of claim 6, wherein the single-lens image capturing device is an endoscope, and the single lens is disposed at one of the endoscopes of the endoscope, and The diameter of the outer cover of the external dual lens module is larger than the diameter of the image capturing end, so that the external double lens module is sleeved on the image capturing end. The external lens-mounted dual-lens image capturing system according to the seventh aspect of the invention, wherein the single-lens image capturing device further comprises a light projection component disposed at the image capturing end to provide an illumination source, and the light guiding The position of the component is corresponding to the position of the light projection component, and the illumination source is guided to the external dual lens module for illumination.