CN107690045B

CN107690045B - Camera assembly, control method thereof and mobile terminal

Info

Publication number: CN107690045B
Application number: CN201710778092.XA
Authority: CN
Inventors: 陈曼
Original assignee: Nubia Technology Co Ltd
Current assignee: Nubia Technology Co Ltd
Priority date: 2017-09-01
Filing date: 2017-09-01
Publication date: 2020-12-29
Anticipated expiration: 2037-09-01
Also published as: CN107690045A

Abstract

The invention discloses a camera assembly, a control method thereof and a mobile terminal, and belongs to the technical field of mobile terminal cameras. The camera assembly includes: the first lens group is used for collecting external light rays to perform imaging processing; the switching type slit is used for cutting into the front focal plane of the first lens group so as to change the light rays coming out of the first lens group into parallel light rays; the focusing element is used for adjusting the focal length of the lens of the first lens group to enable the first lens group to image clearly; a dispersion element for separating light rays of different wavelengths from each other among the parallel light rays; the infrared filter is used for filtering infrared rays and stray light from the first lens group; the second lens group is used for focusing the light rays coming out of the dispersion element; and the image sensor is used for collecting light rays coming out of the infrared filter to perform camera shooting imaging or collecting light rays coming out of the second lens group to perform spectrum imaging. The camera component provided by the invention has the functions of a common camera and a spectrometer.

Description

Camera assembly, control method thereof and mobile terminal

Technical Field

The invention relates to the technical field of mobile terminal cameras, in particular to a camera assembly and a mobile terminal with the same.

Background

On one hand, the spectrometer is a scientific instrument which decomposes light with complex components into spectral lines, and can qualitatively and quantitatively detect main components and elements of various substances, so that the spectrometer can be conveniently applied to aspects such as food safety detection and the like in a life scene. For example, the existence of harmful substances in drinking water, the existence of additives in food, the existence of pesticides on fruit skins and the like can be known. However, the existing spectrometers exist as an independent instrument, are large in size and high in price, are mostly used in scientific research, and are not suitable for use scenes in daily life. On the other hand, with the increasing requirements on portability, thinness and ultralightness of mobile terminals and internet access port products, the requirement on diversification of functions of the mobile terminals is also increasing, and if the functions of the spectrometer can be integrated into the mobile terminal, the spectrometer is certainly suitable for use scenes in daily life. However, the camera of the existing mobile terminal can only be used for ordinary camera shooting, and cannot be used as a spectrometer.

Disclosure of Invention

The invention mainly aims to provide a camera assembly, a control method thereof and a mobile terminal, and aims to enable the camera assembly to have the functions of a common camera and a common spectrometer.

In order to achieve the purpose, the invention provides a camera component, which comprises a first lens group, a second lens group and a third lens group, wherein the first lens group is used for collecting external light rays to perform imaging processing; the switching type slit is used for cutting into the front focal plane of the first lens group so as to change the light rays coming out of the first lens group into parallel light rays; the focusing element is used for adjusting the focal length of the lens of the first lens group to enable the first lens group to image clearly; a dispersion element for separating light rays of different wavelengths from each other among the parallel light rays; the infrared filter is used for filtering infrared rays and stray light from the first lens group; the second lens group is used for focusing the light rays coming out of the dispersion element; and the image sensor is used for collecting the light rays coming out of the infrared filter for shooting and imaging or collecting the light rays coming out of the second lens group for spectral imaging.

Optionally, the camera assembly further comprises a first switching assembly for switching the focusing element to operate when the switching slit cuts out the lens front focal plane of the first lens group, and switching the dispersing element to operate when the switching slit cuts in the lens front focal plane of the first lens group; and the second switching component is used for switching the infrared filter to work when the lens front focal plane of the first lens group is cut out by the switching type slit, and switching the second lens group to work when the lens front focal plane of the first lens group is cut in by the switching type slit.

Optionally, the switching slit includes a slit body and a slit moving motor for driving the slit body to cut in or out the lens front focal plane of the first lens group.

Optionally, the focusing element is a voice coil motor acting on the first lens group.

Optionally, the dispersive element is a slit grating.

Optionally, the infrared filter is an optical glass coating structure or a colored glass structure.

Optionally, the first switching assembly includes a control element and a first switching motor, the control element is configured to control the focusing element to operate, and the first switching motor is configured to drive the dispersive element into the imaging optical path.

Optionally, the second switching assembly includes a second switching motor, and the second switching motor is configured to drive the infrared filter or the second lens group into an imaging optical path.

In addition, the invention also provides a camera assembly control method, which is applied to the camera assembly, and the camera assembly control method comprises the following steps: the camera assembly switches a first working mode, the switching type slit cuts out a lens front focal surface of the first lens group, the focusing element and the infrared filter are switched to work, and the image sensor collects light rays coming out of the infrared filter to carry out shooting imaging; the camera assembly switches a second working mode, the switching slit cuts into the front focal plane of the lens of the first lens group, the dispersion element and the second lens group are switched to work, and the image sensor collects light rays coming out of the second lens group to carry out spectral imaging.

In addition, in order to achieve the above object, the present invention further provides a mobile terminal including the above camera assembly.

According to the camera assembly, the control method thereof and the mobile terminal, the camera assembly can realize a common shooting function through the combination of the first lens group, the focusing element, the infrared filter and the imaging light path of the image sensor; the imaging light path combination of the switching slit, the first lens group, the dispersion element, the second lens group and the image sensor can realize the function of the spectrograph. Therefore, the camera assembly, the control method thereof and the mobile terminal have the functions of a common camera and a spectrometer.

Drawings

Fig. 1 is a schematic diagram of a hardware structure of a mobile terminal implementing various embodiments of the present invention.

Fig. 2 is a diagram of a communication network system architecture on which the mobile terminal shown in fig. 1 is based.

Fig. 3 is a block diagram of a camera assembly according to an embodiment of the present invention.

Fig. 4 is a schematic view of an imaging optical path of the camera assembly shown in fig. 3 when used for image capture.

Fig. 5 is a schematic diagram of an imaging optical path of the camera assembly of fig. 3 when used as a spectrometer.

Fig. 6 is a flowchart of a camera assembly control method according to a second embodiment of the present invention.

The implementation, functional features and advantages of the objects of the present invention will be further explained with reference to the accompanying drawings.

Detailed Description

It should be understood that the specific embodiments described herein are merely illustrative of the invention and are not intended to limit the invention.

In the following description, suffixes such as "module", "component", or "unit" used to denote elements are used only for facilitating the explanation of the present invention, and have no specific meaning in itself. Thus, "module", "component" or "unit" may be used mixedly.

The terminal may be implemented in various forms. For example, the terminal described in the present invention may include a mobile terminal such as a mobile phone, a tablet computer, a notebook computer, a palmtop computer, a Personal Digital Assistant (PDA), a Portable Media Player (PMP), a navigation device, a wearable device, a smart band, a pedometer, and the like, and a fixed terminal such as a Digital TV, a desktop computer, and the like.

The following description will be given by way of example of a mobile terminal, and it will be understood by those skilled in the art that the construction according to the embodiment of the present invention can be applied to a fixed type terminal, in addition to elements particularly used for mobile purposes.

Referring to fig. 1, which is a schematic diagram of a hardware structure of a mobile terminal for implementing various embodiments of the present invention, the mobile terminal 100 may include: RF (Radio Frequency) unit 101, WiFi module 102, audio output unit 103, a/V (audio/video) input unit 104, sensor 105, display unit 106, user input unit 107, interface unit 108, memory 109, processor 110, and power supply 111. Those skilled in the art will appreciate that the mobile terminal architecture shown in fig. 1 is not intended to be limiting of mobile terminals, which may include more or fewer components than those shown, or some components may be combined, or a different arrangement of components.

The following describes each component of the mobile terminal in detail with reference to fig. 1:

the radio frequency unit 101 may be configured to receive and transmit signals during information transmission and reception or during a call, and specifically, receive downlink information of a base station and then process the downlink information to the processor 110; in addition, the uplink data is transmitted to the base station. Typically, radio frequency unit 101 includes, but is not limited to, an antenna, at least one amplifier, a transceiver, a coupler, a low noise amplifier, a duplexer, and the like. In addition, the radio frequency unit 101 can also communicate with a network and other devices through wireless communication. The wireless communication may use any communication standard or protocol, including but not limited to GSM (Global System for Mobile communications), GPRS (General Packet Radio Service), CDMA2000(Code Division Multiple Access 2000), WCDMA (Wideband Code Division Multiple Access), TD-SCDMA (Time Division-Synchronous Code Division Multiple Access), FDD-LTE (Frequency Division duplex Long Term Evolution), and TDD-LTE (Time Division duplex Long Term Evolution).

WiFi belongs to short-distance wireless transmission technology, and the mobile terminal can help a user to receive and send e-mails, browse webpages, access streaming media and the like through the WiFi module 102, and provides wireless broadband internet access for the user. Although fig. 1 shows the WiFi module 102, it is understood that it does not belong to the essential constitution of the mobile terminal, and may be omitted entirely as needed within the scope not changing the essence of the invention.

The audio output unit 103 may convert audio data received by the radio frequency unit 101 or the WiFi module 102 or stored in the memory 109 into an audio signal and output as sound when the mobile terminal 100 is in a call signal reception mode, a call mode, a recording mode, a voice recognition mode, a broadcast reception mode, or the like. Also, the audio output unit 103 may also provide audio output related to a specific function performed by the mobile terminal 100 (e.g., a call signal reception sound, a message reception sound, etc.). The audio output unit 103 may include a speaker, a buzzer, and the like.

The a/V input unit 104 is used to receive audio or video signals. The a/V input Unit 104 may include a Graphics Processing Unit (GPU) 1041 and a microphone 1042, the Graphics processor 1041 Processing image data of still pictures or video obtained by an image capturing device (e.g., a camera) in a video capturing mode or an image capturing mode. The processed image frames may be displayed on the display unit 106. The image frames processed by the graphic processor 1041 may be stored in the memory 109 (or other storage medium) or transmitted via the radio frequency unit 101 or the WiFi module 102. The microphone 1042 may receive sounds (audio data) via the microphone 1042 in a phone call mode, a recording mode, a voice recognition mode, or the like, and may be capable of processing such sounds into audio data. The processed audio (voice) data may be converted into a format output transmittable to a mobile communication base station via the radio frequency unit 101 in case of a phone call mode. The microphone 1042 may implement various types of noise cancellation (or suppression) algorithms to cancel (or suppress) noise or interference generated in the course of receiving and transmitting audio signals.

The mobile terminal 100 also includes at least one sensor 105, such as a light sensor, a motion sensor, and other sensors. Specifically, the light sensor includes an ambient light sensor that can adjust the brightness of the display panel 1061 according to the brightness of ambient light, and a proximity sensor that can turn off the display panel 1061 and/or a backlight when the mobile terminal 100 is moved to the ear. As one of the motion sensors, the accelerometer sensor can detect the magnitude of acceleration in each direction (generally, three axes), can detect the magnitude and direction of gravity when stationary, and can be used for applications of recognizing the posture of a mobile phone (such as horizontal and vertical screen switching, related games, magnetometer posture calibration), vibration recognition related functions (such as pedometer and tapping), and the like; as for other sensors such as a fingerprint sensor, a pressure sensor, an iris sensor, a molecular sensor, a gyroscope, a barometer, a hygrometer, a thermometer, and an infrared sensor, which can be configured on the mobile phone, further description is omitted here.

The display unit 106 is used to display information input by a user or information provided to the user. The Display unit 106 may include a Display panel 1061, and the Display panel 1061 may be configured in the form of a Liquid Crystal Display (LCD), an Organic Light-Emitting Diode (OLED), or the like.

The user input unit 107 may be used to receive input numeric or character information and generate key signal inputs related to user settings and function control of the mobile terminal. Specifically, the user input unit 107 may include a touch panel 1071 and other input devices 1072. The touch panel 1071, also referred to as a touch screen, may collect a touch operation performed by a user on or near the touch panel 1071 (e.g., an operation performed by the user on or near the touch panel 1071 using a finger, a stylus, or any other suitable object or accessory), and drive a corresponding connection device according to a predetermined program. The touch panel 1071 may include two parts of a touch detection device and a touch controller. The touch detection device detects the touch direction of a user, detects a signal brought by touch operation and transmits the signal to the touch controller; the touch controller receives touch information from the touch sensing device, converts the touch information into touch point coordinates, sends the touch point coordinates to the processor 110, and can receive and execute commands sent by the processor 110. In addition, the touch panel 1071 may be implemented in various types, such as a resistive type, a capacitive type, an infrared ray, and a surface acoustic wave. In addition to the touch panel 1071, the user input unit 107 may include other input devices 1072. In particular, other input devices 1072 may include, but are not limited to, one or more of a physical keyboard, function keys (e.g., volume control keys, switch keys, etc.), a trackball, a mouse, a joystick, and the like, and are not limited to these specific examples.

Further, the touch panel 1071 may cover the display panel 1061, and when the touch panel 1071 detects a touch operation thereon or nearby, the touch panel 1071 transmits the touch operation to the processor 110 to determine the type of the touch event, and then the processor 110 provides a corresponding visual output on the display panel 1061 according to the type of the touch event. Although the touch panel 1071 and the display panel 1061 are shown in fig. 1 as two separate components to implement the input and output functions of the mobile terminal, in some embodiments, the touch panel 1071 and the display panel 1061 may be integrated to implement the input and output functions of the mobile terminal, and is not limited herein.

The interface unit 108 serves as an interface through which at least one external device is connected to the mobile terminal 100. For example, the external device may include a wired or wireless headset port, an external power supply (or battery charger) port, a wired or wireless data port, a memory card port, a port for connecting a device having an identification module, an audio input/output (I/O) port, a video I/O port, an earphone port, and the like. The interface unit 108 may be used to receive input (e.g., data information, power, etc.) from external devices and transmit the received input to one or more elements within the mobile terminal 100 or may be used to transmit data between the mobile terminal 100 and external devices.

The memory 109 may be used to store software programs as well as various data. The memory 109 may mainly include a storage program area and a storage data area, wherein the storage program area may store an operating system, an application program required by at least one function (such as a sound playing function, an image playing function, etc.), and the like; the storage data area may store data (such as audio data, a phonebook, etc.) created according to the use of the cellular phone, and the like. Further, the memory 109 may include high speed random access memory, and may also include non-volatile memory, such as at least one magnetic disk storage device, flash memory device, or other volatile solid state storage device.

The processor 110 is a control center of the mobile terminal, connects various parts of the entire mobile terminal using various interfaces and lines, and performs various functions of the mobile terminal and processes data by operating or executing software programs and/or modules stored in the memory 109 and calling data stored in the memory 109, thereby performing overall monitoring of the mobile terminal. Processor 110 may include one or more processing units; preferably, the processor 110 may integrate an application processor, which mainly handles operating systems, user interfaces, application programs, etc., and a modem processor, which mainly handles wireless communications. It will be appreciated that the modem processor described above may not be integrated into the processor 110.

The mobile terminal 100 may further include a power supply 111 (e.g., a battery) for supplying power to various components, and preferably, the power supply 111 may be logically connected to the processor 110 via a power management system, so as to manage charging, discharging, and power consumption management functions via the power management system.

Although not shown in fig. 1, the mobile terminal 100 may further include a bluetooth module or the like, which is not described in detail herein.

In order to facilitate understanding of the embodiments of the present invention, a communication network system on which the mobile terminal of the present invention is based is described below.

Referring to fig. 2, fig. 2 is an architecture diagram of a communication Network system according to an embodiment of the present invention, where the communication Network system is an LTE system of a universal mobile telecommunications technology, and the LTE system includes a UE (User Equipment) 201, an E-UTRAN (Evolved UMTS Terrestrial Radio Access Network) 202, an EPC (Evolved Packet Core) 203, and an IP service 204 of an operator, which are in communication connection in sequence.

Specifically, the UE201 may be the terminal 100 described above, and is not described herein again.

The E-UTRAN202 includes eNodeB2021 and other eNodeBs 2022, among others. Among them, the eNodeB2021 may be connected with other eNodeB2022 through backhaul (e.g., X2 interface), the eNodeB2021 is connected to the EPC203, and the eNodeB2021 may provide the UE201 access to the EPC 203.

The EPC203 may include an MME (Mobility Management Entity) 2031, an HSS (Home Subscriber Server) 2032, other MMEs 2033, an SGW (Serving gateway) 2034, a PGW (PDN gateway) 2035, and a PCRF (Policy and Charging Rules Function) 2036, and the like. The MME2031 is a control node that handles signaling between the UE201 and the EPC203, and provides bearer and connection management. HSS2032 is used to provide registers to manage functions such as home location register (not shown) and holds subscriber specific information about service characteristics, data rates, etc. All user data may be sent through SGW2034, PGW2035 may provide IP address assignment for UE201 and other functions, and PCRF2036 is a policy and charging control policy decision point for traffic data flow and IP bearer resources, which selects and provides available policy and charging control decisions for a policy and charging enforcement function (not shown).

The IP services 204 may include the internet, intranets, IMS (IP Multimedia Subsystem), or other IP services, among others.

Although the LTE system is described as an example, it should be understood by those skilled in the art that the present invention is not limited to the LTE system, but may also be applied to other wireless communication systems, such as GSM, CDMA2000, WCDMA, TD-SCDMA, and future new network systems.

Based on the above mobile terminal hardware structure and communication network system, the present invention provides various embodiments of the method.

Example one

As shown in fig. 3, a camera assembly 300 according to an embodiment of the present invention includes a first lens group 310, a switching slit 320, a focusing element 330, a dispersing element 340, an infrared filter 350, a second lens group 360, an image sensor 370, a first switching element 380 and a second switching element 390.

The first lens group 310 is mainly used for collecting external light to perform imaging processing. Specifically, the lens of the first lens group 310 is a convex lens structure.

The switching slit 320 is mainly used for cutting into the front focal plane of the first lens group 310, so that the light from the first lens group 310 becomes parallel light. Specifically, the switching slit 320 includes a slit body 321 and a slit moving motor 322, and the slit moving motor 322 is used for driving the slit body 321 to cut into or out of the lens front focal plane of the first lens group 310. Thus, when the camera assembly 300 is used as a spectrometer, the slit moving motor 322 drives the slit body 321 to cut into the front focal plane of the first lens group 310, so that the light rays from the first lens group 310 become parallel light rays.

The focusing element 330 is mainly used to adjust the focal length of the first lens group 310, so that the first lens group 310 can be imaged clearly. Specifically, the focusing element 330 is a voice coil motor acting on the first lens group 310. Generally speaking, the focusing of a camera lens group is divided into digital focusing and optical focusing, the former increases the area of each pixel in a picture through a processor so as to achieve the purpose of amplification, and through the digital focusing, a shot scene is amplified, but the definition of the shot scene is reduced to a certain degree, so the digital focusing has no great practical significance. The latter generally relies on an optical lens structure to achieve focusing, and the voice coil motor drives the lens to move to zoom in and out the scene to be shot, so as to make the first lens group 310 image clearly.

The dispersion element 340 is mainly used to separate the light rays of different wavelengths from each other in the parallel light rays exiting the first lens group 310. Specifically, in the spectroscopic instrument, the dispersion element is an element that functions as a light-splitting element, such as a prism, a grating, and the like. In the embodiment, the dispersion element 340 is a slit grating, when the camera assembly 300 is used as a spectrometer, the slit moving motor 322 drives the slit main body 321 to cut into the front focal plane of the first lens group 310, so that the light from the first lens group 310 becomes parallel light, and at this time, after the parallel light passes through the dispersion element 340, the light with different wavelengths will be separated from each other.

The infrared filter 350 is mainly used for filtering out infrared rays and stray light from the first lens group 310. Specifically, the infrared filter 350 is an optical glass coating structure or a colored glass structure, and the infrared filter 350 filters the light rays coming out of the first lens group 310 to remove infrared rays and stray light, so that the camera assembly 300 has a better and clearer shooting effect when used for shooting.

The second lens group 360 is mainly used for focusing the light emitted from the dispersing element 340. Specifically, the lenses of the second lens group 360 are also convex lens structures, and when the camera assembly 300 is used as a spectrometer, the light rays with different wavelengths in the parallel light rays passing through the dispersion element 340 are separated from each other, and then focused on the image sensor 370 after being focused by the second lens group 360 to form a separate spectral line, which can be used for spectral analysis and output of a result.

The image sensor 370 is mainly used for collecting light from the infrared filter 350 for imaging or collecting light from the second lens group 360 for spectral imaging. Specifically, when the camera module 300 is used for taking a video image, the image sensor 370 is used for collecting light from the infrared filter 350 for imaging. When the camera assembly 300 is used as a spectrometer, the image sensor 370 is used to collect the light from the second lens group 360 for spectral imaging.

The first switching component 380 is mainly used to switch the focusing element 330 to work when the switching slit 320 cuts out the front focal plane of the first lens group 310; the switching slit 320 switches the dispersion element 340 to work when cutting into the front lens focal plane of the first lens group 310. Specifically, the first switching assembly 310 includes a control element and a first switching motor, the control element is used to control the focusing element 330 to work, that is, when the camera assembly 300 is used for taking a picture, the control element controls the focusing element 330 to adjust the focal length of the first lens group 310, so that the first lens group 310 can be imaged clearly. The first switching motor is used to drive the dispersion element 340 to enter the imaging optical path, that is, when the camera assembly 300 is used as a spectrometer, the first switching motor will move the dispersion element 340 to enter the imaging optical path of the camera assembly 300, so that the parallel light rays from the first lens group 310 will be separated from each other after passing through the dispersion element 340.

The second switching element 390 is mainly used to switch the infrared filter 350 to work when the lens front focal plane of the first lens group 310 is cut out by the switching slit 320; the switching slit 320 switches the second lens group 360 to work when cutting into the front focal plane of the first lens group 310. Specifically, the second switching assembly 390 comprises a second switching motor, which is used to drive the ir filter 350 or the second lens set 360 to enter the imaging optical path. That is, when the camera assembly 300 is used for taking a picture, the infrared filter 350 is moved by the second switching motor to enter the imaging light path of the camera assembly 300, so that the light from the first lens group 310 is filtered by the infrared filter 350 to obtain better and clearer picture-taking effect of the camera assembly 300. When the camera module 300 is used as a spectrometer, the second switching motor moves the second lens group 360 to enter the imaging optical path of the camera module 300, so that the separated light beams with different wavelengths passing through the dispersion element 340 can be focused on the image sensor 370 after being focused by the second lens group 360 to form a separate spectral line, which can be used for spectral analysis and output of results.

As shown in fig. 4, when the camera head assembly 300 is used for photographing, the switching slit 320 cuts out the front focal plane of the first lens group 310, the focusing element 330 is operated, the infrared filter 350 enters the imaging optical path, and at this time, the whole photographing imaging optical path is formed by the first lens group 310, the infrared filter 350 and the image sensor 370. Thus, when external light enters the first lens group 310, the light is focused by the first lens group 310 and filtered by the infrared filter 350 to form an image on the image sensor 370.

As shown in fig. 5, when the camera assembly 300 is used as a spectrometer, the switching slit 320 is cut into the front focal plane of the first lens group 310, and the dispersive element 340 and the second lens group 360 both enter the imaging optical path, at this time, the whole imaging optical path of the spectrometer is composed of the switching slit 320, the first lens group 310, the dispersive element 340, the second lens group 360 and the image sensor 370. Thus, since the switching slit 320 is located on the front lens focal plane of the first lens group 310, external light passes through the switching slit 320 to form an object point of the imaging system of the spectrometer, and further the light from the first lens group 310 becomes parallel light, and then the light with different wavelengths in the parallel light is separated by the dispersive element 340, and finally, after being focused by the second lens group 360, the light can be focused on the image sensor 370 to form a separate spectral line, which can be used for spectral analysis and output of results.

Example two

As shown in fig. 6, a camera assembly control method according to a second embodiment of the present invention is applied to a camera assembly 300 according to a first embodiment of the present invention, and includes the following steps:

step S1: the camera assembly switches a first working mode, the switching type slit cuts out a lens front focal surface of the first lens group, the focusing element and the infrared filter are switched to work, and the image sensor collects light rays coming out of the infrared filter to carry out camera shooting and imaging.

Specifically, as shown in fig. 3 and 4, when the camera assembly 300 switches to the first working mode, i.e. is used for photographing, the slit moving motor 322 drives the slit main body 321 to cut out the front lens focal plane of the first lens group 310, the control element of the first switching assembly 380 controls the focusing element 330 to adjust the lens focal length of the first lens group 310, so as to make the first lens group 310 image clearly, and at the same time, the second switching motor of the second switching assembly 380 moves the infrared filter 350 to enter the imaging optical path of the camera assembly 300, so that the light from the first lens group 310 is filtered by the infrared filter 350 to make the camera assembly 300 have better and clearer photographing effect. At this time, the entire image-taking optical path is constituted by the first lens group 310, the infrared filter 350, and the image sensor 370. Thus, when external light enters the first lens group 310, the light is focused by the first lens group 310 and filtered by the infrared filter 350 to form an image on the image sensor 370.

Step S2: the camera assembly switches a second working mode, the switching slit is cut into the front focal plane of the lens of the first lens group, the dispersion element and the second lens group are switched to work, and the image sensor collects light rays emitted by the second lens group to carry out spectral imaging.

Specifically, as shown in fig. 3 and 5, when the camera assembly 300 switches to the second operation mode, i.e. is used as a spectrometer, the slit moving motor 322 drives the slit main body 321 to cut into the front lens focal plane of the first lens group 310, the first switching motor of the first switching assembly 380 moves the dispersive element 3400 to enter the imaging optical path of the camera assembly 300, and the second switching motor of the second switching assembly 380 moves the second lens group 360 to enter the imaging optical path of the camera assembly 300. At this time, the whole imaging light path of the spectrometer is composed of the switching slit 320, the first lens group 310, the dispersion element 340, the second lens group 360 and the image sensor 370. Thus, since the switching slit 320 is located on the front lens focal plane of the first lens group 310, external light passes through the switching slit 320 to form an object point of the imaging system of the spectrometer, and further the light from the first lens group 310 becomes parallel light, and then the light with different wavelengths in the parallel light is separated by the dispersive element 340, and finally, after being focused by the second lens group 360, the light can be focused on the image sensor 370 to form a separate spectral line, which can be used for spectral analysis and output of results.

EXAMPLE III

A third embodiment of the present invention provides a mobile terminal, which includes the camera assembly 300 according to the first embodiment, wherein the camera assembly 300 includes a first lens group 310, a switchable slit 320, a focusing element 330, a dispersive element 340, an infrared filter 350, a second lens group 360, an image sensor 370, a first switching assembly 380 and a second switching assembly 390.

According to the camera assembly, the control method thereof and the mobile terminal provided by the embodiment of the invention, the camera assembly can realize a common shooting function through the combination of the first lens group, the focusing element, the infrared filter and the imaging light path of the image sensor; the imaging light path combination of the switching slit, the first lens group, the dispersion element, the second lens group and the image sensor can realize the function of the spectrograph. Therefore, the camera assembly, the control method thereof and the mobile terminal have the functions of a common camera and a spectrometer.

It should be noted that, in this document, the terms "comprises," "comprising," or any other variation thereof, are intended to cover a non-exclusive inclusion, such that a process, method, article, or apparatus that comprises a list of elements does not include only those elements but may include other elements not expressly listed or inherent to such process, method, article, or apparatus. Without further limitation, an element defined by the phrase "comprising an … …" does not exclude the presence of other like elements in a process, method, article, or apparatus that comprises the element.

The above-mentioned serial numbers of the embodiments of the present invention are merely for description and do not represent the merits of the embodiments.

Through the above description of the embodiments, those skilled in the art will clearly understand that the method of the above embodiments can be implemented by software plus a necessary general hardware platform, and certainly can also be implemented by hardware, but in many cases, the former is a better implementation manner. Based on such understanding, the technical solutions of the present invention may be embodied in the form of a software product, which is stored in a storage medium (such as ROM/RAM, magnetic disk, optical disk) and includes instructions for enabling a terminal device (such as a mobile phone, a computer, a server, an air conditioner, or a network device) to execute the method according to the embodiments of the present invention.

The above description is only a preferred embodiment of the present invention, and not intended to limit the scope of the present invention, and all modifications of equivalent structures and equivalent processes, which are made by using the contents of the present specification and the accompanying drawings, or directly or indirectly applied to other related technical fields, are included in the scope of the present invention.

Claims

1. A camera head assembly, characterized in that the camera head assembly comprises:

the first lens group is used for collecting external light rays to perform imaging processing;

the switching type slit is used for cutting into the front focal plane of the first lens group so as to change the light rays coming out of the first lens group into parallel light rays;

the focusing element is used for adjusting the focal length of the lens of the first lens group to enable the first lens group to image clearly;

a dispersion element for separating light rays of different wavelengths from each other among the parallel light rays;

the infrared filter is used for filtering infrared rays and stray light from the first lens group;

the second lens group is used for focusing the light rays coming out of the dispersion element;

the image sensor is used for collecting light rays coming out of the infrared filter for shooting and imaging or collecting light rays coming out of the second lens group for spectral imaging; also comprises the following steps of (1) preparing,

the first switching component is used for switching the focusing element to work when the switching slit cuts out the front lens focal plane of the first lens group, and switching the dispersion element to work when the switching slit cuts in the front lens focal plane of the first lens group; and the second switching component is used for switching the infrared filter to work when the lens front focal plane of the first lens group is cut out by the switching type slit, and switching the second lens group to work when the lens front focal plane of the first lens group is cut in by the switching type slit.

2. A camera assembly according to claim 1, wherein said camera assembly further comprises:

the first switching component is used for switching the focusing element to work when the switching slit cuts out the front lens focal plane of the first lens group, and switching the dispersion element to work when the switching slit cuts in the front lens focal plane of the first lens group;

and the second switching component is used for switching the infrared filter to work when the lens front focal plane of the first lens group is cut out by the switching type slit, and switching the second lens group to work when the lens front focal plane of the first lens group is cut in by the switching type slit.

3. The camera assembly of claim 2, wherein the switching slit includes a slit body and a slit moving motor for driving the slit body to cut into or out of a lens front focal plane of the first lens group.

4. A camera assembly according to claim 2, wherein said focusing element is a voice coil motor acting on said first lens group.

5. A camera assembly according to claim 2, wherein the dispersive element is a slit grating.

6. A camera assembly according to claim 2, wherein the infrared filter is an optical glass coating structure or a coloured glass structure.

7. The camera assembly of claim 2, wherein the first switching assembly includes a control element for controlling the operation of the focusing element and a first switching motor for driving the dispersive element into the imaging path.

8. A camera assembly according to claim 2, wherein the second switching assembly includes a second switching motor for driving the infrared filter or the second lens group into an imaging optical path.

9. A camera assembly control method applied to a camera assembly according to any one of claims 1 to 8, characterized in that the camera assembly control method comprises the steps of:

the camera assembly switches a first working mode, the switching type slit cuts out a lens front focal surface of the first lens group, the focusing element and the infrared filter are switched to work, and the image sensor collects light rays coming out of the infrared filter to carry out shooting imaging;

the camera assembly switches a second working mode, the switching slit cuts into the front focal plane of the lens of the first lens group, the dispersion element and the second lens group are switched to work, and the image sensor collects light rays coming out of the second lens group to carry out spectral imaging.

10. A mobile terminal, characterized in that it comprises a camera assembly according to any of claims 1-8.