CN110022425A - A kind of camera system and image capturing method - Google Patents

Abstract

The invention relates to the field of optical technology, and provides a shooting system and an image shooting method, comprising: an auxiliary circuit, a first lens group, a beam splitter prism, a second lens group, an Nth lens group, and N-1 camera modules. is a positive integer not less than 3; the first lens group receives the reflected light from the object to be photographed, and the reflected light is divided into N‑1 rays after irradiating the beam splitter prism; the second lens group and the Nth lens group are used to receive N‑1 rays respectively 1 light; N‑1 camera modules are used to receive N‑1 light passing through the second lens group and the Nth lens group respectively, and start image collection of the object to be photographed after receiving the collection instruction from the auxiliary circuit . In the shooting system, the light reflected by the object to be shot is divided into multiple light rays by the beam splitting prism, and then irradiated on different camera modules respectively. After starting to shoot, multiple sets of cameras can shoot the object to be shot, thereby increasing the frame rate of shooting while ensuring high resolution.

Description

A shooting system and image shooting method

technical field

The present invention relates to the field of optical technology, and in particular, to a photographing system and an image photographing method.

Background technique

With the increasing development of science and technology, the requirements for high-speed camera acquisition and camera resolution in the fields of industrial online inspection and military projects related to measurement are also getting higher and higher. my country has a certain technical foundation in the design and manufacture of image sensor chips. For example, Changguang Chenxin Company has the custom design and production capabilities of CMOS image sensor chips with various frame rates and resolutions. At the same time, research institutes and companies and other institutions Accumulated some experience in opto-mechanical design and electronic system design, technical strength combined with intellectual property protection of this patent makes the realization of high frame rate and resolution camera highly practical.

At present, my country has accumulated a certain amount of technology in the design and manufacture of image sensor chips such as CMOS. For example, Changguang Chenxin has made certain achievements in the commercialization and localization of image sensor chips such as GMAX2505 and GMAX0505. The above sensor chip as the core can realize the frame rate of black and white/color camera module up to 150 frames per second to 250 frames per second, or higher frame rate, and the resolution of such products can reach 1K*1K and other resolutions. However, the performance of domestic cameras is still far from meeting the existing needs. In this regard, there is a high degree of dependence on imported equipment, especially for high-speed cameras such as 500 frames per second and 1000 frames per second.

SUMMARY OF THE INVENTION

In view of the above problems, the present invention proposes a shooting system and an image shooting method to solve the problem that the acquisition speed and resolution of the camera cannot meet the user's requirements when shooting images in the prior art.

The purpose of the present invention can be achieved through the following technical measures:

A first aspect of the embodiments of the present invention provides a shooting system, the shooting system includes: an auxiliary circuit, a first lens group, a beam splitter prism, a second lens group, an Nth lens group, and N-1 camera modules, N is a positive integer not less than 3;

Wherein, the first lens group is used to receive the reflected light of the object to be photographed, and the reflected light is divided into N-1 lines of light after irradiating the beam splitting prism;

The second lens group and the Nth lens group are used to receive the N-1 light rays respectively;

The N-1 camera modules are used to respectively receive the N-1 light rays passing through the second lens group and the Nth lens group, and start to process the object to be photographed after receiving the acquisition instruction of the auxiliary circuit. Image Acquisition.

Optionally, the shooting system further includes N-1 storage devices, and the N-1 storage devices are respectively connected to the N-1 camera modules, and are used to store the N-1 camera modules respectively. collected images.

Optionally, the first lens unit, the second lens group, and the Nth lens group each include one or more lenses.

Optionally, the auxiliary circuit sends acquisition instructions to N-1 camera modules respectively according to a specified time interval.

Optionally, the specified time interval includes 4ms.

Optionally, the camera module includes a CMOS image sensor or a CCD image sensor.

A second aspect of the embodiments of the present invention provides an image capturing method, which is applied to the capturing system described in any of the above, including:

After the reflected light of the object to be photographed irradiates the first lens group, it is divided into multiple light rays through the beam splitting prism;

After detecting that the multi-channel light rays are irradiated to the N-1 camera modules respectively, the auxiliary circuit sends acquisition instructions to the N-1 camera modules respectively to instruct the N-1 camera modules to start Collect images of objects to be photographed;

Wherein, the multi-path light rays are respectively irradiated on the second lens group to the Nth lens group, and are respectively irradiated on the N-1 camera modules through the second lens group to the Nth lens, and N is not A positive integer less than 3.

Optionally, the image capturing method further includes:

After the N-1 camera modules collect the images of the objects to be photographed, the collected images are respectively stored in the N-1 storage devices.

Optionally, after the collected images are respectively stored in N-1 storage devices, the method includes:

The auxiliary circuit sequentially reads the stored images from the N-1 storage devices according to the order in which the images are stored, so as to obtain image data in a continuous time.

Optionally, it is characterized in that the auxiliary circuit sends acquisition instructions to N-1 camera modules respectively according to a specified time interval.

Compared with the prior art, the present invention provides that the light reflected by the object to be photographed in the photographing system is divided into multiple light beams by the beam splitting prism, and then irradiated on different camera modules respectively. After starting to shoot, multiple sets of cameras can shoot the object to be shot at the same time, thereby increasing the shooting frame rate while ensuring high resolution.

Description of drawings

1 is a schematic diagram of the overall structure of a shooting system provided by an embodiment of the present invention;

FIG. 2 is a schematic diagram illustrating image information recorded at different time points by different camera modules according to an embodiment of the present invention.

Among them, 1. the object to be photographed; 2. the first lens group; 3. the beam splitting prism; 4. the second lens group; 5. the Nth lens group; 6. the auxiliary circuit.

Detailed ways

In order to make the objectives, technical solutions and advantages of the present invention clearer, the present invention will be further described in detail below with reference to the accompanying drawings and specific embodiments. It should be understood that the specific embodiments described herein are only used to explain the present invention, but not to limit the present invention.

In order to make the description of the present disclosure more detailed and complete, the following provides an illustrative description of the embodiments and specific embodiments of the present invention; but this is not the only form of implementing or using the specific embodiments of the present invention. The features of various specific embodiments as well as method steps and sequences for constructing and operating these specific embodiments are encompassed in the detailed description. However, other embodiments may also be utilized to achieve the same or equivalent function and sequence of steps.

Please refer to FIG. 1, the photographing system provided by this application includes an object to be photographed 1, a first lens group 2, a beam splitting prism 3, a second lens group 4, an Nth lens group 5, an auxiliary circuit 6, and N-1 camera modules. group and storage devices corresponding to the N-1 camera modules, and further, a storage device may also be provided in the auxiliary circuit 6 to store the image data read by the auxiliary circuit. Among them, N is a positive integer greater than or equal to 3. That is, when N is equal to 3, there are two camera modules in the shooting system and two storage devices corresponding to the two camera modules respectively.

Wherein, the first lens group 1 is used to receive the reflected light of the object to be photographed, and the reflected light is divided into N-1 light rays after irradiating the beam splitting prism 3;

The second lens group 4 and the Nth lens group are used to receive the N-1 light rays respectively;

The N-1 camera modules are used to respectively receive the N-1 light rays passing through the second lens group 4 and the Nth lens group 5, and start processing after receiving the acquisition instruction of the auxiliary circuit 6. Shoot the object for image acquisition.

Further, the shooting system further includes N-1 storage devices, and the N-1 storage devices are respectively connected with the N-1 camera modules, and are used to store the data of the N-1 camera modules respectively. acquired images.

Optionally, the first lens 2, the second lens group 4 and the Nth lens group 5 all include one or more lenses.

Optionally, the auxiliary circuit 6 sends acquisition instructions to N-1 camera modules respectively according to a specified time interval.

Optionally, the specified time interval includes 4ms.

Optionally, the camera module includes a CMOS image sensor or a CCD image sensor.

The following takes N equal to three as an example for specific description:

The shooting system provided by this application includes: an optical system, which is composed of a lens and a beam splitter prism, and the core device is a beam splitter prism. The optical system is used to divide the image of the object into two paths, and the same image of the object is projected to two camera modules. , so that each camera module can get the same image. If 1 image optical path is copied into 2 paths, then the camera module with the original frame rate of 250 frames per second can form a camera system that records 500 frames per second through this structure and method; if 1 image path is copied into 4 paths, the original The frame rate is multiplied by 4, and so on. For example: using the GMAX2505 image sensor chip of Changguang Chenxin as the core to make a black and white/color camera module with a resolution of 1K*1K and a frame rate of 250 frames per second, using this structure to copy one image optical path into two , and then through the method described in this application, it becomes a camera system that can record images at 500 frames per second.

It also includes a camera module. The camera module with CMOS, CCD and other image sensors (such as GMAX2505, GMAX0505, etc. of Changguang Chenxin Co., Ltd.) as the core can start and collect images after receiving the start signal, and store the images in the storage device at the end (such as the memory in Figure 1). Memory, the back end of each camera module corresponds to a memory, which is used to store the image data sent by the camera module. The memory can be integrated with the camera module and can be read out through external interfaces, such as Cameralink, Ethernet port, Serial port, optical fiber interface, etc. Acquisition control circuit, which sends start signals at different times so that different camera modules start to collect images at different times, which makes different camera modules record image data at different times in the following time (as shown in Figure 2). After the image acquisition is completed, the cycle is performed in sequence, and each acquisition control circuit reads out one frame of image from each memory and stores it in the memory in the acquisition control circuit. In this way, image data in continuous time can be restored. The acquisition control circuit can choose FPGA as the core device, so that the startup time of the camera module can be accurate to within 10ns (many series of FPGAs can limit the time to 5ns or even lower).

The invention provides that after the light reflected by the object to be shot in the shooting system is divided into multiple light rays by the beam splitting prism, the light rays are respectively irradiated on different camera modules. After starting to shoot, multiple sets of cameras can shoot the object to be shot at the same time, thereby increasing the shooting frame rate while ensuring high resolution.

Embodiment 2

An embodiment of the present invention further provides an image capturing method, which is applied to the capturing system described in any of the above, including:

After the reflected light of the object to be photographed irradiates the first lens group, it is divided into multiple light rays through the beam splitting prism;

After detecting that the multi-channel light rays are irradiated to the N-1 camera modules respectively, the auxiliary circuit sends acquisition instructions to the N-1 camera modules respectively to instruct the N-1 camera modules to start Collect images of objects to be photographed;

Wherein, the multi-path light rays are respectively irradiated on the second lens group to the Nth lens group, and are respectively irradiated on the N-1 camera modules through the second lens group to the Nth lens, and N is not A positive integer less than 3.

Optionally, the image capturing method further includes:

After the N-1 camera modules collect the images of the objects to be photographed, the collected images are respectively stored in the N-1 storage devices.

Optionally, after the collected images are respectively stored in N-1 storage devices, the method includes:

The auxiliary circuit sequentially reads the stored images from the N-1 storage devices according to the order in which the images are stored, so as to obtain image data in a continuous time.

Optionally, it is characterized in that the auxiliary circuit sends acquisition instructions to N-1 camera modules respectively according to a specified time interval.

The following takes N=3 as an example to describe the process of image acquisition by the above-mentioned photographing system.

As shown in FIG. 2 , when the above-mentioned shooting system is used to collect the image of the object to be shot, the auxiliary circuit sends a signal at time 1 to make the No. 1 camera module start to collect images, and the auxiliary circuit sends a signal at time 2 to make the No. 2 camera start to collect images. . If the original camera module has a frame rate of 250 frames per second, and there are 2 camera modules in the system, the time interval T between time 1 and time 2 satisfies: T<1 second/250=4ms, preferably: 2*T=1 second/250=4ms. The auxiliary circuit can choose FPGA as the core device, so that the startup time of the camera module can be accurate to within 10ns (many series of FPGAs can limit the time to 5ns or even lower). The image data at time 1 is recorded by the camera module No. 1, and the image data at time 2 is recorded by the camera module No. 2. If the optical system replicates 2-channel images and there are 2 camera modules at the same time, the image at time 3 is recorded by 1. Camera No. 2 records, and the image at time 4 is recorded by camera module No. 2, and so on, as shown in Figure 2. After the image acquisition is completed, if the optical system replicates 2 image optical paths and there are 2 camera modules at the same time: the memory of the camera module No. 1 stores the image data at times 1, 3, 5, 7, etc.; The memory stores image data at times 2, 4, 6, 8, and so on. After the above process, the auxiliary circuit reads one frame of image of No. 1 memory once, and stores the image data into the memory in the auxiliary circuit, thus obtaining the image data of time 1; then the auxiliary circuit reads one frame of image of No. 2 memory once, And store the image data into the memory in the auxiliary circuit, so that the image data at time 2 is obtained; continue to read one frame of image from the No. 1 memory once, so as to obtain the image data at time 3, and so on, to obtain continuous image data during this time.

The invention provides that after the light reflected by the object to be shot in the shooting system is divided into multiple light rays by the beam splitting prism, the light rays are respectively irradiated on different camera modules. After starting to shoot, multiple sets of cameras can shoot the object to be shot at the same time, thereby increasing the shooting frame rate while ensuring high resolution.

The above descriptions are only preferred embodiments of the present invention and are not intended to limit the present invention. Any modifications, equivalent replacements and improvements made within the spirit and principles of the present invention shall be included in the protection of the present invention. within the range.

Claims (10)

1. A photographing system, characterized in that, the photographing system comprises: an auxiliary circuit, a first lens group, a beam splitting prism, a second lens group, an Nth lens group and N-1 camera modules, where N is not less than a positive integer of 3; Wherein, the first lens group is used to receive the reflected light of the object to be photographed, and the reflected light is divided into N-1 lines of light after irradiating the beam splitting prism; The second lens group and the Nth lens group are used to receive the N-1 light rays respectively; The N-1 camera modules are used to respectively receive the N-1 light rays passing through the second lens group and the Nth lens group, and start to process the object to be photographed after receiving the acquisition instruction of the auxiliary circuit. Image Acquisition. 2 . The photographing system according to claim 1 , wherein the photographing system further comprises N-1 storage devices, and the N-1 storage devices are respectively connected to the N-1 camera modules. 3 . , which are used to store the images collected by N-1 camera modules respectively. 3 . The photographing system according to claim 1 , wherein the first lens R, the second lens group and the Nth lens group all include one or more lenses. 4 . 4 . The photographing system according to claim 1 , wherein the auxiliary circuit sends acquisition instructions to N−1 camera modules respectively according to a specified time interval. 5 . 5. The photographing system of claim 4, wherein the specified time interval comprises 4 ms. 6 . The photographing system according to claim 1 , wherein the camera module comprises a CMOS image sensor or a CCD image sensor. 7 . 7. An image capturing method, characterized in that, applied in the capturing system according to any one of claims 1-6, comprising: After the reflected light of the object to be photographed irradiates the first lens group, it is divided into multiple light rays through the beam splitting prism; After detecting that the multi-channel light rays are irradiated to the N-1 camera modules respectively, the auxiliary circuit sends acquisition instructions to the N-1 camera modules respectively to instruct the N-1 camera modules to start Collect images of objects to be photographed; Wherein, the multi-path light rays are respectively irradiated on the second lens group to the Nth lens group, and are respectively irradiated on the N-1 camera modules through the second lens group to the Nth lens, and N is not A positive integer less than 3. 8. The image capturing method according to claim 7, wherein the image capturing method further comprises: After the N-1 camera modules collect the images of the objects to be photographed, the collected images are respectively stored in the N-1 storage devices. 9. The image capturing method according to claim 8, wherein after the collected images are respectively stored in N-1 storage devices, the method comprises: The auxiliary circuit sequentially reads the stored images from the N-1 storage devices according to the order in which the images are stored, so as to obtain image data in a continuous time. 10. The image capturing method according to any one of claims 7-9, wherein the auxiliary circuit sends acquisition instructions to N-1 camera modules respectively according to a specified time interval.