TW201421988A - Dual channel and wide-angle observation system - Google Patents

Abstract

A dual channel and wide-angle observation system is constructed from at least two lenses assemblies, at least two polarizers, at least two polarize controllers, at least two light-transmittal controllers and a PBS. The polarized images are able to be adjusted through polarize controllers and light-transmittal controllers, at the same time a timing controller is used to control polarize controllers in order to switch channels in the system. The images from channels are detected by a CCD sensor which is electrically connected to a processor, and the processor is capable of images combining. Accordingly, the wide-angle image is obtain via images combining from channels, and light-transmittal controllers are adjustable to obtain the balance of lightness of the combined image.

Description

Wide viewing angle multi-path image capturing system

The invention relates to a wide-view multi-path image capturing system, in particular to a multi-path imaging system with timing switching, so as to achieve image capturing with a wide viewing angle.

Generally speaking, the wide viewing angle (or wide-angle) shooting technology is more common for the photographing and photography of the scene, in order to achieve the vision as viewed by the human eye, and to highlight the spectacle of the scene and the integrity of the object. It can even create a wider perspective than the human eye, making the wide-angle lens more widely used. For example, in military applications as a video surveillance, it expands the scope of investigation and avoids the omission of any important image information. Another example is the capture of space images (Habbit Telescope). The range of galaxies is very wide. Therefore, wide-angle technology is required for shooting to capture complete images. In addition, applications on vehicles, such as popular driving recorders or shooting such as Google Street Maps, need to be achieved using wide-angle technology, which makes it possible to record the importance of image recording.

At present, the existing technology is achieved by using a plurality of aspherical lenses, wherein the curvature of each lens is calculated by a specific formula, and the arrangement order of the lenses is set in accordance with the image taking direction of the object to form a wide-angle lens. However, this technique is difficult to control in aspherical production, and its yield is difficult to control, and the curvature and setting structure of the aspherical lens must be redesigned according to the length of the different lenses, resulting in high product cost.

Another prior art is to mount a camera module on the vehicle, which changes the image taking direction through a first motor and a second motor. The first motor is rotated by a horizontal axis, and the second motor is rotated by another axis perpendicular to the horizontal axis, so that the camera module can perform an all-round image effect. However, this technique is less immediate, that is, the motor needs a certain time in the process of moving, and it is inconvenient to use, and the structural stability must also be tested, otherwise the image distortion may be caused.

Although the prior art is currently a method for multi-channel optical imaging, it can improve the aforementioned deficiency. However, the imaging and image processing of different optical channels cannot be synchronized, resulting in residual images on the display screen. When the light intensities of different optical channels are different, the display screen will have a problem of discontinuity in brightness.

Therefore, how to solve the above-mentioned shortcomings is urgently needed to be solved by the industry.

The object of the present invention is to provide a wide-view multi-path image capturing system that controls the imaging path of the optical path with timing control and the light transmittance to control the light intensity of the optical path, so that the imaging picture is continuous and no image remains.

For the above purposes, the technical means of the present invention is: providing a first image capturing module for capturing a first image for zooming, polarization control, and grayscale control; and providing a second image for capturing a second image capturing module for performing zooming, polarization control, and grayscale control; a polarization beam splitter for providing the first image and the second image guide; and receiving the polarization beam splitter The first image and the second image are photoimaged and generated a sensor module like a signal; a control module that processes the image signal.

The first image capturing module further includes a first lens unit, a first polarization unit, a first polarization control unit, and a first transmittance control unit. The second image capture module The second lens unit, a second polarization unit, a second polarization control unit and a second transmittance control unit; the control module further includes a timing control unit, a brightness control unit and an image Processing unit.

Performing wide-field image capturing through the first lens unit and the second lens unit, and adopting a liquid crystal optical switch structure as the first polarization control unit, the second polarization control unit, and the first transmittance control The unit and the second transmittance control unit are configured to effectively perform intensity adjustment and polarization conversion of the incident light source, and then cooperate with the timing control unit to quickly switch the imaging optical path, so that the image of the multiple optical path can be imaged in the photosensitive module. A wide-angle image with a balanced field of view and no residual image.

In order to facilitate the review committee to have a better understanding and understanding of the technical means and operation process of the present invention, the embodiments are combined with the drawings, and the details are as follows.

Referring to FIG. 1 , a wide viewing angle multi-optical image capturing system according to a preferred embodiment of the present invention includes a first image capturing module 1 , a second image capturing module 2 , and a pole A PBS (Polarized Beam Splitter), a photosensitive module 4 and a control module 5. First image capture mode The group 1 and the second image capturing module 2 respectively provide light incidence to respectively capture a first image and a second image. For convenience of description, the first image and the second image are respectively represented by an image A and an image B.

The first image capturing module 1 provides the image A, and scales the image A (obtains an image A'), gives linear polarization (obtains an image A"), and polarizes (acquires one) Image A''') and grayscale control (obtain an image A'''').

The second image capturing module 2 provides the image B, and scales the image B (obtains an image B'), gives linear polarization (obtains an image B"), and polarizes (acquires one) Image B''') and grayscale control (obtain an image B'''').

The polarizing beam splitter 3 is disposed at the imaging end of the first image capturing module 1 and the second image capturing module 2, and receives one of the image A′′′′ and the image B′′′′ And directing the image A'''' or the image B'''' according to the polarization direction.

The photosensitive module 4 receives one of the image A′′′′ and the image B′′′′ for photo imaging and generates an imaging signal.

The control module 5 includes a timing control unit 51, a brightness control unit 52, and an image processing unit 53, and is electrically connected to the photosensitive module 4 to receive the imaging signal.

In the preferred embodiment, the first image capturing module 1 includes a first lens unit 11, a first polarization unit 12, and a first polarization. The control unit 13 and a first transmittance control unit 14.

In the preferred embodiment, the second image capturing module 2 includes a second lens unit 21, a second polarization unit 22, a second polarization control unit 23, and a second penetration. Rate control unit 24.

In the preferred embodiment, the first lens unit 11 includes a plurality of lenses (not shown) having a first optical axis and scaling the image A to generate the image A'.

In the preferred embodiment, the first polarization unit 12 is disposed along the first optical axis at the imaging end of the first lens unit 11, and the image A' is polarization-filtered to generate the image. A".

In the preferred embodiment, the first polarization control unit 13 is disposed along the first optical axis at the imaging end of the first polarization unit 12, and selectively transmits the image A" and selectively transmits The image is "polarized" to produce the image A'''.

In the preferred embodiment, the first transmittance control unit 14 is disposed along the first optical axis at the imaging end of the first polarization control unit 13, and controls the image through the adjustment of the light transmittance. A''' gray gradation to produce the image A''''.

In the preferred embodiment, the second lens unit 21 includes a plurality of lenses (not shown) having a second optical axis and scaling the image B to generate the image B'.

In the preferred embodiment, the second polarization unit 22 is along the second mirror The second optical axis of the imaging unit of the head unit is set, and the image B' is subjected to polarization screening to generate the image B".

In the preferred embodiment, the second polarization control unit 23 is disposed along the second optical axis at the imaging end of the second polarization unit 22, and selectively transmits the image B", and selects the transmission time. The image B is "polarized rotated" to produce the image B'".

In the preferred embodiment, the second transmittance control unit 24 is disposed along the second optical axis at the imaging end of the second polarization control unit 23, and controls the image through the adjustment of the light transmittance. B''' gray gradation to produce the image B''''.

In the preferred embodiment, the image A" is a linearly polarized P-polarized light.

In the preferred embodiment, the image B" is a linearly polarized S-polarized light.

In the preferred embodiment, the timing control unit 51 transmits a first signal to the first polarization control unit 13 or a second signal to the second polarization control unit 23 to perform optical path opening and closing control.

In the preferred embodiment, the brightness control unit 52 transmits a third signal to the first transmittance control unit 14 or transmits a fourth signal to the second transmittance control unit 24 for light transmittance. (light transmittance) adjustment.

In the preferred embodiment, the first polarization control unit 13 and the second polarization control unit 23 are both a liquid crystal optical switch structure (not shown), and the first signal, the first Two signals control the image A" and the image B" penetration or not.

In the preferred embodiment, the first transmittance control unit 14 and the second transmittance control unit 24 are both the liquid crystal optical switch structure, and are controlled by the third signal and the fourth signal respectively. The gray level (ie, image brightness) of the image A'''' and the image B'''' is output.

In the preferred embodiment, the photosensitive module 4 includes a focusing unit 41 and a photosensitive unit 42 (such as an CCD sensor).

Furthermore, the operation mode of the liquid crystal optical switch structure is described here. The structure of the liquid crystal optical switch (not shown) is a structure composed of a polarizing plate/electrode/liquid crystal/electrode/polarizing plate, and the electrode can be applied without a voltage. Let a polarized light pass through and select to rotate 90 degrees; if there is an applied voltage to the electrode, the polarized light cannot be passed.

In the physical application, the control module 5 is further electrically connected to a display module 6 for synthesizing the image synthesized by the image processing unit 53 (the combination of the image A′′′′ and the image B′′′′) Display is performed through the display module 6.

The present invention is characterized in that the purpose of obtaining a plurality of images by using the timing control sensitization is as follows. Referring to FIG. 2a and FIG. 2b, the optical paths of the first image capturing module 1 and the second image capturing module 2 are alternated. The operation diagram is as follows (detailed by the above image code).

Imaging of the first image capturing module 1 : when the control module 5 causes the timing control unit 51 to transmit the second signal to the second polarization control unit 23 for a time t ₁ to make the first The polarization control unit 23 blocks the imaging path of the image B", and can wait for the structure shown in FIG. 2a. The image A is image-zoomed through the first lens unit 11 to obtain the image A'. It passes through the first polarization unit 12 and becomes a linear S-polarized image A". Then, after the image A" passes the first polarization control unit 13, the polarization direction of the image A" is rotated by 90 degrees to become the image A''', which is further accepted by the first transmittance control unit 14. And the first transmittance control unit 14 adjusts the gray scale to the image A′′′ according to the third signal transmitted by the control module 5 to become the image A′′′′. The image A'''' is guided to the photosensitive module 4 by the polarization beam splitter 3, and is focused on the photosensitive unit 42 through the focusing unit 41. The photosensitive unit 42 after the photosensitive imaging signal is transmitted to the image processing unit 53, which will be recognized that the image A according to the imaging signal received within the time t ₁ ''''.

Imaging of the second image capturing module 2: when the control module 5 causes the timing control unit 51 to transmit the first signal to the first polarization control unit 13 at a time t ₂ to make the first The polarization control unit 13 blocks the imaging path of the image A", that is, the structure shown in FIG. 2b. The image B is image-zoomed through the second lens unit 21 to obtain the image B'. After passing through the second polarization unit 22, it becomes a linear P-polarized image B". Then, after the image B" passes the second polarization control unit 23, the polarization direction of the image B" is rotated by 90 degrees to become the image B"', which is further accepted by the second transmittance control unit 24. And according to the fourth signal transmitted by the control module 5, the second transmittance control unit 24 adjusts the gray level of the image B′′′ to become the image B′′′′. The image B'''' is guided to the photosensitive module 4 by the polarization beam splitter 3, and is focused on the photosensitive unit 42 through the focusing unit 41. The photosensitive unit 42 after the photosensitive imaging signal is transmitted to the image processing unit 53, which will be recognized that the image signal B according to the imaging time t ₂ within the received ''''.

Following the above operation, the image processing unit 53, respectively, the time t ₁ the image A '' and B images within the time t ₂ of the '''', through the display module displays the synthesis of 6, i.e., the image The boundary of A'''' is combined with the boundary of the image B'''' to form a wide-angle image. Since the time of t ₁ and t ₂ is very short, and the opening and closing reaction time of the liquid crystal optical switch structure is 30 to 50 ms, the characteristics of the persistence of the human eye can not be detected, so that the wide-angle image is continuous. And, the image capturing time can be as _{t 3, t 4, t 5} ... and so on, so that the first image capturing module 1 and the second image capturing module 2 rapidly alternating operation, to generate a Continuous wide-angle image.

In fact, depending on the imaging optical path, there is no guarantee that the brightness of the boundary between the image A'''' and the image B'''' is continuous, so that the wide-angle image has discontinuous distortion of the picture. Therefore, the image processing unit 53 causes the brightness control unit 52 to generate the third signal and the fourth signal according to the pixel brightness of the boundary between the image A′′′′ and the image B′′′′. The first transmittance module 14 and the second transmittance module 24 adjust the light transmittance, thereby changing the final imaging brightness of the image A′′′′ and the image B′′′′ to obtain a comparison. Wide-angle image with good brightness balance.

It can be seen that the wide viewing angle multi-optical path image capturing system of the present invention is transparent. The first image capturing module 1 and the second image capturing module 2 perform image capturing of a wide field of view, and adopt a liquid crystal optical switch structure as the first polarization control unit 13, and the second polarization control The unit 23, the first transmittance control unit 14 and the second transmittance control unit 24 are configured to effectively perform incident light source intensity adjustment and polarization conversion, and cooperate with the timing control unit 51 to quickly switch the imaging optical path. The image of the multi-path can be imaged in the photosensitive module 4, and the wide-angle image with the brightness balance of the field of view and no residual image is obtained.

The detailed description of the preferred embodiments of the present invention is not intended to limit the scope of the present invention, and the equivalent implementations or modifications of the present invention should be included in the present invention. In the scope of patents.

1‧‧‧First image capture module

11‧‧‧First lens unit

12‧‧‧First Polarization Unit

13‧‧‧First Polarization Control Unit

14‧‧‧First penetration rate control unit

2‧‧‧Second image capture module

21‧‧‧second lens unit

22‧‧‧Second polarization unit

23‧‧‧Second Polarization Control Unit

24‧‧‧Second penetration control unit

3‧‧‧Polarizing beam splitter

4‧‧‧Photosensitive module

41‧‧‧ Focus unit

42‧‧‧Photosensitive unit

5‧‧‧Control Module

51‧‧‧Time Control Unit

52‧‧‧Brightness control unit

53‧‧‧Image Processing Unit

6‧‧‧Display module

1 is a schematic diagram of a wide viewing angle multi-path image capturing system of the present invention; FIG. 2a is a schematic diagram of image capturing through a first image capturing module; and FIG. 2b is an image of a second image capturing module Capture the schematic.

1‧‧‧First image capture module

11‧‧‧First lens unit

12‧‧‧First Polarization Unit

13‧‧‧First Polarization Control Unit

14‧‧‧First penetration rate control unit

2‧‧‧Second image capture module

21‧‧‧second lens unit

22‧‧‧Second polarization unit

23‧‧‧Second Polarization Control Unit

24‧‧‧Second penetration control unit

3‧‧‧Polarizing beam splitter

5‧‧‧Control Module

51‧‧‧Time Control Unit

52‧‧‧Brightness control unit

53‧‧‧Image Processing Unit

4‧‧‧Photosensitive module

41‧‧‧ Focus unit

42‧‧‧Photosensitive unit

6‧‧‧Display module

Claims (8)

A wide-view multi-path image capturing system includes: a first image capturing module having a first optical axis, providing a first image, zooming, linear polarization, polarization modulation And gray level control; a second image capturing module having a second optical axis, providing a second image, zooming, giving linear polarization, polarization modulation, and gray scale a polarization beam splitter is disposed at an imaging end of the first image capturing module and the second image capturing module to provide one of the first image and the second image a photosensitive module that receives one of the first image and the second image guided by the polarizing beam splitter to perform photographic imaging and generates an imaging signal; and a control module The photosensitive module is electrically connected and receives the imaging signal for processing. The wide-view multi-path image capturing system of claim 1, wherein the first image capturing module comprises a first lens unit, a first polarization unit, and a first polarization control. a unit and a first transmittance control unit. The wide-view multi-path image capturing system of claim 2, wherein the second image capturing module comprises a second lens unit, a second polarization unit, a second polarization control unit and a second transmittance control unit. The wide viewing angle multi-optical image capturing system according to claim 3, wherein the control module comprises a timing control unit, a brightness control unit and an image processing unit. The wide viewing angle multi-optical image capturing system of claim 4, wherein the timing control unit transmits a first signal to the first polarization control unit and transmits a second signal to the second pole One of the control units performs control of the optical path opening and closing. The wide viewing angle multi-optical image capturing system of claim 4, wherein the brightness control unit transmits a third signal to the first transmittance control unit and transmits a fourth signal to the second One of the transmittance control units adjusts the light transmittance. The wide viewing angle multi-optical image capturing system according to claim 3, wherein the first polarization control unit is coupled to the second polarization control unit, the first transmittance control unit, and the second The transmittance control units are all liquid crystal optical switch structures. The wide viewing angle multi-path image capturing system of claim 1, wherein the control module is electrically connected to a display module for displaying the synthesized image through the display module.