Telescope device, optical module and communication terminal

Abstract

The embodiment of the invention provides telescopic equipment, an optical module and a communication terminal, relates to the technical field of optics, and is used for reducing the installation and adjustment difficulty of the telescopic equipment. The telescopic device comprises a first reflecting mirror with a first reflecting surface and a second reflecting mirror with a second reflecting surface. And the first reflecting mirror and the second reflecting mirror form an off-axis optical system. Wherein light enters the first reflecting surface, is transmitted to the second reflecting surface after being reflected by the first reflecting surface, and is emitted after being reflected by the second reflecting surface; the light comprises a first beam and a second beam; the distance between the position where the first light beam enters the first reflecting surface and the geometric center of the first reflecting surface is larger than the distance between the position where the second light beam enters the first reflecting surface and the geometric center of the first reflecting surface. The distance between the position where the first light beam enters the second reflecting surface and the geometric center of the second reflecting surface is larger than the distance between the position where the second light beam enters the second reflecting surface and the geometric center of the second reflecting surface.

Description

Technical Field

[0001] This application relates to the field of optical technologies, and in particular, to a telescopic device, an optical module, and a communication terminal. Background Art

[0002] Due to its characteristics such as high speed, large communication capacity, light weight, good confidentiality, and strong anti-interference ability, the free-space optical communication system can become an effective way for information transmission, especially suitable for the high-speed information transmission between communication base stations.

[0003] The ATP (acquisition, tracking, pointing) optical antenna for free-space optical communication generally includes a reflective telescopic device, which mainly includes a first reflector and a second reflector. The light is reflected by the first reflector and then received by the second reflector, and then reflected by the second reflector and transmitted to the rear optical path to achieve signal reception.

[0004] However, when assembling the reflective telescopic device, since it is necessary to adjust the positional relationship between the reflector and the mirror frame to ensure the position accuracy of the first reflector and the second reflector, the assembly difficulty of the optical antenna is relatively large. Summary of the Invention

[0005] Embodiments of this application provide a telescopic device, an optical module, and a communication terminal, which are used to reduce the assembly and adjustment difficulty of the telescopic device.

[0006] To achieve the above object, this application adopts the following technical solutions:

[0007] In a first aspect of the embodiments of this application, a telescopic device applied to an optical antenna is provided, which includes a first reflector having a first reflecting surface and a second reflector having a second reflecting surface. The first reflector and the second reflector form an off-axis optical system. Among them, the light is incident on the first reflecting surface, reflected by the first reflecting surface and then transmitted to the second reflecting surface, and then exits after being reflected by the second reflecting surface; the light includes a first light beam and a second light beam; the distance between the position where the first light beam is incident on the first reflecting surface and the geometric center of the first reflecting surface is greater than the distance between the position where the second light beam is incident on the first reflecting surface and the geometric center of the first reflecting surface, and the distance between the position where the first light beam is incident on the second reflecting surface and the geometric center of the second reflecting surface is greater than the distance between the position where the second light beam is incident on the second reflecting surface and the geometric center of the second reflecting surface.

[0008] In the telescopic device provided by the embodiment of the present application, after the light is incident, it is reflected by the first reflecting surface and the second reflecting surface in sequence and then exits. The distance between the position where the first light beam is incident on the first reflecting surface and the geometric center of the first reflecting surface is greater than the distance between the position where the second light beam is incident on the first reflecting surface and the geometric center of the first reflecting surface. The distance between the position where the first light beam is incident on the second reflecting surface and the geometric center of the second reflecting surface is greater than the distance between the position where the second light beam is incident on the second reflecting surface and the geometric center of the second reflecting surface. The partial light source incident on the part of the first reflecting surface close to the light passing hole is reflected to the edge of the second reflecting surface close to the light passing hole, while the partial light source incident on the part of the first reflecting surface close to the center of the light passing hole is reflected to the center of the second reflecting surface close to the light passing hole. The solution of the embodiment of the present application can reduce the aberration between the incident light and the outgoing light and improve the imaging quality.

[0009] In a possible implementation manner, the first reflecting mirror is a concave mirror and the second reflecting mirror is a convex mirror. In this way, an implementation manner of a telescopic device is provided.

[0010] In a possible implementation manner, the direction of the incident light incident on the first reflecting mirror is the same as the direction of the outgoing light exiting from the second reflecting mirror. In this way, an implementation manner of a telescopic device is provided.

[0011] In a possible implementation manner, the first reflecting surface has a first axis of rotational symmetry, and the second reflecting surface has a second axis of rotational symmetry; the first axis of rotational symmetry and the second axis of rotational symmetry are parallel to the light incident direction, and the first axis of rotational symmetry is disposed deviating from the first reflecting surface; the second axis of rotational symmetry is disposed deviating from the second reflecting surface; the first reflecting mirror and the second reflecting mirror are disposed on the same side of the first axis of rotational symmetry. In this way, the first reflecting mirror and the second reflecting mirror can form an optical system.

[0012] Further, the distance between the position where the first light beam is incident on the first reflecting surface and the first axis of rotational symmetry is greater than the distance between the position where the second light beam is incident on the first reflecting surface and the first axis of rotational symmetry; the distance between the position where the first light beam is incident on the second reflecting surface and the second axis of rotational symmetry is greater than the distance between the position where the second light beam is incident on the second reflecting surface and the second axis of rotational symmetry.

[0013] In a possible implementation manner, the first reflecting mirror is a concave mirror and the second reflecting mirror is a concave mirror. In this way, an implementation manner of a telescopic device is provided.

[0014] In a possible implementation, the telescopic device further includes a third reflector, and the third reflector has a third reflecting surface; the third reflecting surface is a plane, and the third reflecting surface is configured to transmit the light from the first reflecting surface to the second reflecting surface; the direction of the incident light incident on the first reflector is opposite to the direction of the outgoing light exiting from the second reflector. In this way, by changing the light transmission path through the third reflector, the size of the telescopic device can be reduced.

[0015] In a possible implementation, the first reflecting surface has a first axis of rotational symmetry, and the second reflecting surface has a second axis of rotational symmetry; the first axis of rotational symmetry and the second axis of rotational symmetry are parallel to the light incident direction, and the first axis of rotational symmetry is disposed offset from the first reflecting surface; the second axis of rotational symmetry is disposed offset from the second reflecting surface; the first reflecting surface and the second reflecting surface are respectively disposed on opposite sides of the first axis of rotational symmetry. In this way, the off-axis amounts of the first reflector and the second reflector can be reduced.

[0016] In a possible implementation, the clear aperture of the first reflector is greater than or equal to 50 mm, and the clear aperture of the second reflector is greater than 5 or equal to 5 mm. In this way, both the entrance pupil diameter and the exit pupil diameter of the telescopic device provided by the embodiments of the present application are relatively large.

[0017] In a possible implementation, the ratio of the equivalent curvature of the first reflector to the equivalent curvature of the second reflector is equal to the ratio of the focal length of the first reflector to the focal length of the second reflector. In this way, the first reflector and the second reflector can form a afocal beam-reducing optical system.

[0018] In a possible implementation, the first axis of rotational symmetry and the second axis of rotational symmetry coincide. In this way, the processing difficulty of the first reflector and the second reflector is reduced, and the manufacturing precision of the first reflector and the second reflector can be improved.

[0019] In a possible implementation, the off-axis amount of the first reflector is greater than one-third of the equivalent curvature of the first reflector. In this way, the size of the telescopic device can be reduced.

[0020] In a possible implementation, the dimension of the first reflector along the light incident direction is less than half of the equivalent curvature of the first reflector. In this way, the size of the telescopic device can be reduced.

[0021] In a possible implementation, the clear aperture of the first reflecting surface is greater than half of the equivalent curvature of the first reflector. In this way, the size of the telescopic device can be reduced.

[0022] In a possible implementation, the clear aperture of the first reflecting surface is greater than the clear aperture of the second reflecting surface. In this way, the first reflector serves as the primary mirror and the second reflector serves as the secondary mirror.

[0023] In a possible implementation, both the first reflecting surface and the second reflecting surface are parabolic surfaces. In this way, the optical performance of the telescopic device can be improved.

[0024] In a possible implementation, the light beam further includes a third light beam, and the third light beam is reflected from the center of the light passing hole of the first mirror to the center of the light passing hole of the second mirror.

[0025] In a possible implementation, the telescopic device further includes a third mirror, and the third mirror has a third reflecting surface; the third reflecting surface is a free-form surface, and the third reflecting surface is used to transmit the light beam from the first reflecting surface to the second reflecting surface. In this way, the design freedom of the telescopic device can be improved, and the optical performance of the telescopic device can be enhanced.

[0026] In a possible implementation, the telescopic device further includes a first mirror mount and a second mirror mount; the first mirror mount includes a first support member and a second support member connected to each other, the first mirror is disposed on the first support member, the second support member extends along the direction of the incident light beam, and the second support member is used to support the second mirror mount; the second mirror is disposed on the second mirror mount. In this way, an implementation manner of the mirror mount is provided.

[0027] In a possible implementation, the first mirror mount and the first mirror are an integrally formed structure. In this way, the first mirror mount and the first mirror can be processed integrally, the processing difficulty of the first mirror can be reduced, and the accuracy of the first mirror can be improved.

[0028] In a possible implementation, the second mirror mount and the second mirror are an integrally formed structure. In this way, the second mirror mount and the second mirror can be processed integrally, the processing difficulty of the second mirror can be reduced, and the accuracy of the second mirror can be improved.

[0029] In a possible implementation, the first mirror mount and the second mirror mount are bonded. In this way, a fixed connection between the first mirror mount and the second mirror mount can be achieved. In addition, the first reflecting surface is disposed on the first mirror mount, and the second reflecting surface is disposed on the second mirror mount, so that when adjusting the telescopic device, the positions of the first mirror mount or the second mirror mount can be changed to change the transmission path of the light beam on the first reflecting surface and the second reflecting surface, reducing the adjustment difficulty of the telescopic device.

[0030] In a possible implementation, a mounting post is disposed on the second support member, and a mounting hole is formed on the second mirror mount, and the mounting post is bonded in the mounting hole. In this way, a fixed connection between the first mirror mount and the second mirror mount can be achieved.

[0031] In a possible implementation, the first lens holder and the second lens holder are of an integrally formed structure. In this way, the accuracy of the first reflector and the second reflector can be improved, and the relative relationship between the first reflector and the second reflector can be avoided from being adjusted, making the adjustment of the telescopic device simple and reducing the adjustment cost of the telescopic device.

[0032] In a possible implementation, the thermal expansion coefficients of the materials of the first lens holder and the second lens holder are the same. In this way, the heat conduction ability of the telescopic device can be improved, the influence of temperature on the first reflecting surface and the second reflecting surface can be reduced, and the temperature adaptability of the telescopic device can be enhanced.

[0033] In a possible implementation, the telescopic device further includes a third lens holder; a third reflector is disposed on the third lens holder; the third lens holder is bonded to the second lens holder. In this way, a fixed connection between the third lens holder and the second lens holder can be achieved.

[0034] In a possible implementation, the third reflector and the third lens holder are of an integrally formed structure. In this way, integrated processing of the third lens holder and the third reflector can be achieved, and the adjustment difficulty can be reduced.

[0035] In the second aspect of the embodiments of the present application, an optical module is provided, including a light source and a telescopic device according to any one of the first aspect; the light source is used to provide light for the telescopic device.

[0036] The optical module provided in the second aspect of the embodiments of the present application includes a telescopic device according to any one of the first aspect, and its beneficial effects are the same as those of the telescopic device, which will not be elaborated herein.

[0037] In the third aspect of the embodiments of the present application, a communication terminal is provided, including the optical module according to the second aspect and an optical deflection component, and the optical deflection component is used to transmit light to the optical module.

[0038] The communication terminal provided in the third aspect of the embodiments of the present application includes the optical module according to the second aspect, and its beneficial effects are the same as those of the optical module, which will not be elaborated herein. BRIEF DESCRIPTION OF THE DRAWINGS

[0039] Figure 1A It is a schematic diagram of a satellite communication link provided by the embodiments of the present application;

[0040] Figure 1B It is a schematic diagram of the structure of a communication terminal provided by the embodiments of the present application;

[0041] Figure 2A It is a schematic diagram of the structure of another communication terminal provided by the embodiments of the present application;

[0042] Figure 2BSchematic diagram of another communication terminal provided by an embodiment of the present application;

[0043] Figure 3A Schematic diagram of a telescopic device provided by an embodiment of the present application;

[0044] Figure 3B Schematic diagram of another telescopic device provided by an embodiment of the present application;

[0045] Figure 4A Schematic diagram of another telescopic device provided by an embodiment of the present application;

[0046] Figure 4B Schematic diagram of another telescopic device provided by an embodiment of the present application;

[0047] Figure 5 Schematic diagram of another telescopic device provided by an embodiment of the present application;

[0048] Figure 6A Schematic diagram of another telescopic device provided by an embodiment of the present application;

[0049] Figure 6B Schematic diagram of another telescopic device provided by an embodiment of the present application;

[0050] Figure 7 Schematic diagram of another telescopic device provided by an embodiment of the present application;

[0051] Figure 8 Schematic diagram of another telescopic device provided by an embodiment of the present application;

[0052] Figure 9 Schematic diagram of another telescopic device provided by an embodiment of the present application;

[0053] Figure 10 Schematic diagram of another telescopic device provided by an embodiment of the present application;

[0054] Figure 11 Schematic diagram of another communication terminal provided by an embodiment of the present application;

[0055] Figure 12 Schematic diagram of another telescopic device provided by an embodiment of the present application;

[0056] Figure 13 Schematic diagram of another telescopic device provided by an embodiment of the present application;

[0057] Figure 14 Schematic diagram of another telescopic device provided by an embodiment of the present application;

[0058] Figure 15 Another schematic structural diagram of a communication terminal provided by an embodiment of the present application.

[0059] Reference numerals

[0060] 11 - Main mirror; 12 - Secondary mirror; 13 - Light-transmitting hole; 14 - Light-transmitting hole; 10 - Telescopic device; 20 - Turntable part; 21 - Reflector turntable; 22 - Rotating double prism turntable; 30 - Rear optical path part; 31 - Tracking optical path; 32 - Receiving optical path; 33 - Transmitting optical path; 110 - First mirror frame; 101 - First support; 102 - Second support; 111 - Mounting post; 120 - Second mirror frame; 121 - Mounting hole; 130 - Third mirror frame; 210 - First reflector; 220 - Second reflector; 230 - Third reflector; 211 - First reflecting surface; 221 - Second reflecting surface; 223 - Third reflecting surface. Detailed implementation manners

[0061] Next, the technical solutions in the embodiments of the present application will be described with reference to the accompanying drawings in the embodiments of the present application. Obviously, the described embodiments are only a part of the embodiments of the present application, rather than all the embodiments.

[0062] Hereinafter, terms such as "second" and "first" are only for convenience of description, and cannot be understood as indicating or implying relative importance or implicitly specifying the quantity of the indicated technical features. Thus, features defined with "second", "first", etc. may explicitly or implicitly include one or more of such features. In the description of the present application, unless otherwise specified, the meaning of "a plurality" is two or more.

[0063] In addition, in the embodiments of the present application, orientation terms such as "upper", "lower", "left", "right", etc. may include but are not limited to being defined relative to the schematic placement orientation of the components in the accompanying drawings. It should be understood that these directional terms may be relative concepts, which are used for relative description and clarification, and may change accordingly with the change of the orientation of the components placed in the accompanying drawings.

[0064] In the embodiments of the present application, unless otherwise clearly specified and limited, the term "connection" should be understood in a broad sense. For example, "connection" may be a fixed connection, a detachable connection, or an integral body; it may be directly connected, or indirectly connected through an intermediate medium. In addition, the term "coupled" may be a direct electrical connection, or an indirect electrical connection through an intermediate medium. The term "contact" may be a direct contact, or an indirect contact through an intermediate medium.

[0065] In the embodiments of the present application, "and / or" describes the association relationship of associated objects, indicating that there can be three relationships. For example, A and / or B can represent: A exists alone, A and B exist simultaneously, and B exists alone, where A and B can be singular or plural. The character " / " generally indicates that the associated objects before and after are in an "or" relationship.

[0066] To facilitate the understanding of the technical solution, the technical terms involved in the present application are explained below.

[0067] Focal power: It is equal to the difference between the converging power of the image-side light beam and the converging power of the object-side light beam, and characterizes the refractive ability of the optical system for the incident parallel light beam. The focal power is generally represented by φ. The larger the value of φ, the more severely the parallel light beam is refracted. When φ > 0, the refraction is convergent; when φ < 0, the refraction is divergent. When φ = 0, it is plane refraction, that is, the parallel light beam along the axis remains a parallel light beam along the axis after refraction, without refraction.

[0068] Thickness of the lens: The thickness of the lens on the optical axis is the thickness of the lens.

[0069] Focal length (focal length, f), also known as the focal length, is a measure of the aggregation or divergence of light in an optical system. It refers to the perpendicular distance from the optical center of the lens or lens group to the imaging plane when an infinitely distant scene forms a clear image on the imaging plane through the lens or lens group.

[0070] Back focal length (back focal length, BFL): Also known as the back focal distance, it refers to the distance from the lens closest to the image side in the lens or lens group to the imaging plane of the optical lens.

[0071] Positive focal power: The lens or lens group has a positive focal length and has the effect of converging light rays.

[0072] Negative focal power: The lens or lens group has a negative focal length and has the effect of diverging light rays.

[0073] Chief ray: The ray that passes through the center of the entrance pupil and the exit pupil of the lens.

[0074] Optical axis: It is a ray that perpendicularly passes through the center of the ideal lens. When a ray parallel to the optical axis enters a convex lens, an ideal convex lens should be such that all rays converge at a point behind the lens. The point that converges all rays is the focal point.

[0075] Axis of rotational symmetry: A straight line that can make a geometric figure form axial symmetry or rotational symmetry. The geometric figure formed by rotating 360° along this straight line is a rotationally symmetric figure, and this straight line is the axis of rotational symmetry.

[0076] Rotationally symmetric structure: A structure formed by a geometric figure rotating 360° around a rotational symmetry axis.

[0077] Mirror center axis: An axis passing through the geometric center of the mirror and parallel to the rotational symmetry axis.

[0078] Clear aperture: The projection aperture of the incident light beam of the mirror along the direction of the mirror center axis.

[0079] Mirror off-axis amount: Also known as the mirror offset amount, which is the distance between the geometric center of the mirror and the rotational symmetry axis. That is, the distance between the mirror center axis and the rotational symmetry axis.

[0080] Front optical path: Generally refers to the optical path used for beam aperture compression.

[0081] Rear optical path: A general term for the entire optical path after the aperture compression of the front optical path, generally including the coupling of multiple sub-optical paths, the combination of optical devices in different sub-optical paths, etc.

[0082] The following will describe in detail the technical solutions in the embodiments of the present application with reference to the accompanying drawings.

[0083] Space optical communication systems have the advantages of high speed, large communication capacity, light weight, good confidentiality, strong anti-interference ability, etc., making them an effective way for information transmission, especially suitable for the transmission of high-speed information between communication base stations.

[0084] Exemplarily, high-speed optical communication can be achieved by means of phase modulation and coherent demodulation. Among them, coherent optical communication uses multiple dimensions of the optical carrier, such as amplitude, phase, polarization state, time, and frequency, to modulate the signal. Digital coherent optical communication technology based on digital signal processing has a flexible and controllable modulation method and can provide modulation signals with different rates, spectral efficiencies, and power efficiencies, and is widely used in optical fiber transmission. Therefore, it is necessary to apply optical fiber transmission communication to space optical communication.

[0085] Exemplarily, a space optical communication system includes an acquisition, tracking, pointing (ATP) optical antenna. Among them, the ATP optical antenna is mainly used for signal transmission and reception. When transmitting a signal, the ATP optical antenna needs to collimate and expand the light beam, and at the same time, it also needs to compress the divergence angle of the light beam to complete the emission of the light beam. When receiving a signal, the ATP optical antenna needs to collect the light beam and converge the light beam to a light collector (which can include, for example, an optical fiber or a rear optical path, etc.).

[0086] The embodiments of the present application illustrate a communication terminal. This communication terminal can be applied to the above-mentioned space optical communication system. This communication terminal can realize various functions such as tracking, transmitting, and receiving of free space laser communication.

[0087] An embodiment of this application also illustrates a communication link between satellites. During satellite communication, after two satellites are aligned, they send optical signals carrying information, thereby enabling communication between the satellites. As Figure 1A shown, satellite A and satellite B are aligned and transmit optical signals to enable communication with each other. Exemplarily, satellite A can transmit an optical signal carrying information to satellite B, and satellite B receives and collects the optical signal. Or, exemplarily, satellite B can also transmit an optical signal carrying information to satellite A, and satellite A receives and collects the optical signal. In this way, communication between satellite A and satellite B can be achieved.

[0088] As Figure 1B shown, an optical antenna is also illustrated. The optical antenna can be integrated into the above-mentioned satellite A or satellite B to enable satellite A and satellite B to transmit, receive, and process optical signals. As Figure 1B shown, the optical antenna includes a control module, an optical communication module, and an optical communication terminal module. The control module, the optical communication module, and the optical communication terminal module are communicatively connected to each other.

[0089] Exemplarily, the optical communication module can include a light source and an optical processor. Among them, the optical processor processes the light emitted by the light source to form an optical signal carrying information, so as to achieve the optical communication function.

[0090] The optical processor can include, for example, an optical amplifier or an optical collector. The embodiments of this application do not limit this, and it can be reasonably set according to the actual situation.

[0091] Exemplarily, the optical communication terminal module is used for light shaping, transmission, and acquisition, tracking, pointing (ATP).

[0092] The optical communication terminal module can include, for example, a lens assembly such as a telescopic device.

[0093] Exemplarily, the control module is used to send control instructions to the optical communication module and the optical communication terminal module. For example, the control module sends an instruction to the optical communication terminal module to control the optical communication terminal module to adjust its orientation and angle. During the process of adjusting the orientation and angle, the optical communication terminal module can monitor the relative position between the satellites to achieve alignment between the satellites. Then, optical signals are transmitted and received through the optical communication module to achieve communication between the satellites.

[0094] Taking Figure 1BSatellite A transmits signals to satellite B for illustrative purposes. The control module sends an instruction to establish communication with satellite B to the optical communication terminal module. After receiving the instruction, the optical communication terminal module adjusts the orientation and angle of the lens assembly until the optical communication terminal module detects the relative position between satellite B and satellite A. Then, the optical communication terminal feeds back the relative position information to the control module.

[0095] The control module sends an instruction to the optical communication module, and the optical communication module transmits the optical signal carrying information to satellite B through the optical communication terminal, and satellite B receives the optical signal. In this way, optical communication between satellite A and satellite B is achieved.

[0096] It should be clarified here that the process of satellite B transmitting signals to satellite A is the same as the process of satellite A transmitting signals to satellite B described above.

[0097] As Figure 2A shown, the embodiment of the present application also illustrates a communication terminal. The communication terminal may, for example, include the above-mentioned optical communication terminal module.

[0098] Among them, the communication terminal includes a front optical path and a rear optical path.

[0099] The front optical path is used to reduce the beam diameter from a larger aperture to a smaller aperture, and then transmit the beam to the rear optical path for processing.

[0100] The rear optical path is used to track, transmit or receive the beam.

[0101] Figure 2A The illustrated communication terminal can also be used in other fields such as remote sensing image acquisition systems and laser shaping systems. The embodiments of the present application do not limit this.

[0102] In some embodiments, as Figure 2A shown, the front optical path may include a turntable part and a telescopic device.

[0103] That is to say, the communication terminal may include a turntable part, a telescopic device, and a rear optical path part.

[0104] Exemplarily, as Figure 2B shown, the turntable part 20 may include a mirror turntable 21 and a rotating double prism turntable 22, etc. The turntable part 20 adjusts the transmission direction of the beam by rotating the mirror turntable 21 and the rotating double prism turntable 22, and the turntable part 20 is also used to achieve alignment between satellites.

[0105] The turntable part 20 transmits the beam to the telescopic device 10, and then the telescopic device 10 reduces the beam diameter and transmits the beam to the rear optical path part 30.

[0106] As Figure 2BAs shown, the rear optical path part 30 may include a tracking optical path 31, a receiving optical path 32, and a transmitting optical path 33.

[0107] Among them, the tracking optical path 31 is used to display an object and can quickly find the object. The receiving optical path 32 is used to receive light, and the transmitting optical path 33 is used to transmit light.

[0108] The embodiment of the present application also illustrates an optical module. The optical module can be used in the above communication terminal. For example, the communication terminal includes an optical module and an optical deflection component. The optical deflection component is used to transmit light to the optical module. Among them, the above turntable part 20 can be regarded as the optical deflection component.

[0109] Exemplarily, the optical module may include a light source and the above telescopic device. The light source is used to provide light for the above telescopic device.

[0110] In some embodiments, the optical module includes at least one of an optical transmitting component or an optical receiving component.

[0111] Exemplarily, the optical module may be an optical transmitting component. In this case, the light is converged after passing through the telescopic device and exiting.

[0112] Or, exemplarily, the optical module may be an optical receiving component. In this case, the light is diverged after passing through the telescopic device and exiting.

[0113] Or, exemplarily, the optical module may be an optical transceiver component formed by integrating an optical transmitting component and an optical receiving component together.

[0114] In some embodiments, the telescopic device 10 of the above front optical path includes a reflective telescopic device. The reflective telescopic device mainly includes a primary mirror and a secondary mirror. The reflective telescopic device is mainly used to converge the light beam from a larger aperture to a smaller aperture, and then transmit the light beam to the rear optical path part 30 for processing.

[0115] It should be clarified here that the larger reflective mirror in the reflective telescopic device is called the primary mirror, and the smaller reflective mirror in the reflective telescopic device is called the secondary mirror.

[0116] Exemplarily, the reflective telescopic device can be classified into a coaxial reflective telescopic device and an off-axis reflective telescopic device according to the architecture.

[0117] As Figure 3A shown, a coaxial reflective telescopic device is illustrated. The reflective telescopic device includes a primary mirror 11 and a secondary mirror 12. Among them, the primary mirror 11 is provided with a light-transmitting hole 13. The optical axis of the primary mirror 11 of the coaxial reflective telescopic device coincides with the geometric center of the primary mirror 11, and the optical axis of the secondary mirror 12 coincides with the geometric center of the secondary mirror 12.

[0118] As Figure 3AAs shown, when the light is incident on the primary mirror 11, the primary mirror 11 reflects the light to the secondary mirror 12, and then the secondary mirror 12 reflects the light to the light-transmitting hole 13, and then the light is emitted from the light-transmitting hole 13, and the diameter of the light beam is reduced. When the light is incident on the secondary mirror 12 from the light-transmitting hole 13 of the primary mirror 11, the secondary mirror 12 reflects the light beam to the primary mirror 11, and then the light beam is reflected by the primary mirror 11, and the diameter of the light beam is expanded.

[0119] Coaxial reflective telescope equipment is simple to assemble and adjust, has low difficulty, is highly mature and reliable, and is widely used in the aerospace field. Currently, most space optical communication systems use coaxial optical architecture.

[0120] However, the coaxial optical structure requires a light hole 13 to be opened on the primary mirror 11, which increases the manufacturing cost. In addition, during the light transmission process, part of the light will be blocked by the secondary mirror 12, resulting in light waste, and stray light passes through the light hole 13, affecting the transmission quality of the optical signal.

[0121] like Figure 3B As shown, an off-axis reflective telescope device is also illustrated. The primary mirror 11 and the secondary mirror 12 of the off-axis reflective telescope device are staggered, and the primary mirror 11 does not need to have a light-transmitting hole. The optical axis of the primary mirror 11 of the off-axis reflective telescope device does not coincide with the geometric center of the primary mirror 11, and the optical axis of the secondary mirror 12 does not coincide with the geometric center of the secondary mirror 12.

[0122] The transmission path of light in the off-axis reflective telescope is similar to the transmission path in the coaxial reflective telescope, and reference may be made to the description of the transmission path of light in the coaxial reflective telescope.

[0123] like Figure 3B As shown, the transmission path of the light can avoid the primary mirror 11 and the secondary mirror 12, so the off-axis optical architecture does not need to open a light-transmitting hole on the primary mirror 11, thereby avoiding light waste. At the same time, along the propagation direction of the light beam, the size of the off-axis optical architecture is small, which can reduce the packaging size of the reflective telescope device.

[0124] However, the production cost of the reflector in the off-axis optical architecture is relatively high, and the adjustment precision requirements of the primary mirror 11 and the secondary mirror 12 are relatively high, resulting in relatively high adjustment costs.

[0125] like Figure 4A As shown, the embodiment of the present application illustrates a telescopic device. The telescopic device includes a coaxial reflective telescopic device. Figure 4A As shown, since the central areas of the primary mirror 11 and the secondary mirror 12 are blocked, a light-transmitting hole 13 is provided on the primary mirror 11, and a light-transmitting hole 14 is provided on the secondary mirror 12. At the same time, the transmitting end and the receiving end of the telescope device are arranged on the side of the light-transmitting hole 13 away from the light-transmitting hole 14.

[0126] In this way, integrating the reflection end and the receiving end on one side can reduce the volume of the telescopic device 10.

[0127] However, in the above telescopic device 10, in order to ensure the transmission of light, the distance and position between the primary mirror 11 and the secondary mirror 12 are relatively sensitive, and the primary mirror 11 and the secondary mirror 12 are respectively adjusted. There are many optical elements to be adjusted, and the adjustment cost is relatively high.

[0128] As Figure 4B shown, an embodiment of the present application also schematically shows a telescopic device. The telescopic device includes a coaxial reflective telescopic device and a transmissive optical transceiver system. The optical axes of the coaxial reflective telescopic device and the transmissive optical transceiver system are parallel and do not coincide. In order to make the coaxial reflective telescopic device and the transmissive optical transceiver system have the same aperture, a mirror a1 and a mirror a2 are provided on one side of the coaxial reflective telescopic device and the transmissive optical transceiver system. The light rays of the coaxial reflective telescopic device and the transmissive optical transceiver system are made to coincide through the mirror a1 and the mirror a2, and a telescopic device 10 with integrated transceiver function is realized.

[0129] However, the above telescopic device 10 does not solve the problems such as large size and high adjustment cost of the telescopic device 10, and more optical elements are also required.

[0130] Based on this, in order to reduce the adjustment cost of the telescopic device 10, an embodiment of the present application provides a telescopic device. As Figure 5 shown, the telescopic device 10 includes a first mirror 210 having a first reflection surface 211 and a second mirror 220 having a second reflection surface 221.

[0131] As Figure 6A shown, light rays are incident on the first reflection surface 211, are reflected by the first reflection surface 211 and then transmitted to the second reflection surface 221, and are reflected by the second reflection surface 221 and then exit.

[0132] Among them, the first mirror 210 and the second mirror 220 form an off-axis optical system.

[0133] That is to say, as Figure 6A shown, the optical axis of the first mirror 210 does not coincide with the geometric center A of the first mirror 210, and the optical axis of the second mirror 220 does not coincide with the geometric center B of the second mirror 220. The transmission route of the light rays after being reflected by the first mirror 210 does not transmit along the optical axis of the first mirror 210, and the transmission route of the light rays after being reflected by the second mirror 220 does not transmit along the optical axis of the second mirror 220.

[0134] It is hereby clarified that the incident light can first be incident on the first reflection surface 211, and after being reflected by the first reflection surface 211, it is transmitted to the second reflection surface 221, and then reflected by the second reflection surface 221 to obtain the outgoing light. Alternatively, the incident light can also first be incident on the second reflection surface 221, and after being reflected by the second reflection surface 221, it is transmitted to the first reflection surface 211, and then reflected by the first reflection surface 211 to obtain the outgoing light. The embodiments of the present application do not limit this, and it can be reasonably set according to the actual situation. For the convenience of illustration below, it is illustrated that the incident light is incident on the first reflection surface 211 and reflected by the second reflection surface 221.

[0135] Continue to refer to Figure 6A , the light includes a first light beam b1 and a second light beam b2.

[0136] As Figure 6A shown, the distance between the position where the first light beam b1 is incident on the first reflection surface 211 and the geometric center A of the first reflection surface 211 is greater than the distance between the position where the second light beam b2 is incident on the first reflection surface 211 and the geometric center A of the first reflection surface 211.

[0137] As Figure 6A shown, the distance between the position where the first light beam b1 is incident on the second reflection surface 221 and the geometric center B of the second reflection surface 221 is greater than the distance between the position where the second light beam b2 is incident on the second reflection surface 221 and the geometric center B of the second reflection surface 221.

[0138] In some embodiments, as Figure 6A shown, the first reflection surface 211 has a first axis of rotational symmetry, and the second reflection surface 221 has a second axis of rotational symmetry.

[0139] Among them, the first axis of rotational symmetry and the second axis of rotational symmetry are parallel to the light incident direction. The first axis of rotational symmetry is disposed offset from the first reflection surface 211, and the second axis of rotational symmetry is disposed offset from the second reflection surface 221. That is to say, the first axis of rotational symmetry does not overlap with the first reflection surface 211, and the second axis of rotational symmetry does not overlap with the second reflection surface 221.

[0140] Exemplarily, the first axis of rotational symmetry of the first reflection surface 211 can be understood as a straight line that can make the first reflection surface 211 form axial symmetry or rotational symmetry. The distance between the geometric center A of the first reflection surface 211 and the first axis of rotational symmetry is called the offset or off-axis amount of the first reflection surface 211. That is to say, the position of the first axis of rotational symmetry can be determined by using the off-axis amount of the first reflection surface 211.

[0141] Similarly, the second rotation symmetry axis of the second reflecting surface 221 can be understood as a straight line that enables the second reflecting surface 221 to form axial symmetry or rotational symmetry. The distance between the geometric center B of the second reflecting surface 221 and the first rotation symmetry axis is called the offset or off-axis amount of the second reflecting surface 221. That is to say, the position of the first rotation symmetry axis can be determined by using the off-axis amount of the second reflecting surface 221.

[0142] Among them, the distance between the position where the first light beam b1 is incident on the first reflecting surface 211 and the first rotation symmetry axis is greater than the distance between the position where the second light beam b2 is incident on the first reflecting surface 211 and the first rotation symmetry axis.

[0143] The distance between the position where the first light beam b1 is incident on the second reflecting surface 221 and the second rotation symmetry axis is greater than the distance between the position where the second light beam b2 is incident on the second reflecting surface 221 and the second rotation symmetry axis.

[0144] That is to say, as Figure 6A shown, the first light beam b1 is reflected from the edge of the first reflecting surface 211 on the side away from the first rotation symmetry axis to the edge of the second reflecting surface 221 on the side away from the second rotation symmetry axis. The second light beam b2 is reflected from the edge of the first reflecting surface 211 on the side close to the first rotation symmetry axis to the edge of the second reflecting surface 221 on the side close to the second rotation symmetry axis.

[0145] Exemplarily, as Figure 6A shown, the light rays further include a third light beam b3. The third light beam b3 is reflected from the center of the light passing hole of the first reflecting mirror 210 to the center of the light passing hole of the second reflecting mirror 220.

[0146] That is to say, the light rays include multiple light beams. Some light beams incident on the edge of the light passing hole of the first reflecting mirror 210 are still transmitted to the edge of the light passing hole of the second reflecting mirror 220 after being reflected by the first reflecting mirror 210, and some light beams incident on the center of the light passing hole of the first reflecting mirror 210 are still transmitted to the center of the light passing hole of the second reflecting mirror 220 after being reflected by the first reflecting mirror 210. Or rather, some light sources incident on the first reflecting surface 211 close to the geometric center are reflected to the area of the second reflecting surface 221 close to the geometric center, while some light sources incident on the first reflecting surface 211 away from the geometric center are reflected to the area of the second reflecting surface 221 away from the geometric center. The telescopic device 10 provided in the embodiment of the present application does not change the relative positions of the incident light on the first reflecting mirror 210 and the second reflecting mirror 220, and reduces the aberration between the incident light and the outgoing light.

[0147] Continuing to refer to Figure 5 , the telescopic device 10 further includes a first mirror holder 110 and a second mirror holder 120.

[0148] Among them, the first reflector 210 is disposed on the first mirror mount 110, and the second reflector 220 is disposed on the second mirror mount 120.

[0149] Exemplarily, the first mirror mount 110 includes a first support member 101 and a second support member 102. The first support member 101 and the second support member 102 are connected. Among them, the first reflector 210 is disposed on the first support member 101 of the first mirror mount 110. The second support member 102 extends along the direction of the incident light (the first rotation symmetry axis).

[0150] Exemplarily, as Figure 5 shown, the second support member 102 is used to support the second mirror mount 120.

[0151] In the embodiments of the present application, the first mirror mount 110 and the first reflector 210 are an integrally formed structure. The second mirror mount 120 and the second reflector 220 may be an integrally formed structure. Or, it may not be an integrally formed structure.

[0152] Exemplarily, only the first mirror mount 110 and the first reflector 210 are an integrally formed structure, and the second mirror mount 120 and the second reflector 220 are not an integrally formed structure.

[0153] Or, exemplarily, the first mirror mount 110 and the first reflector 210 are an integrally formed structure, and the second mirror mount 120 and the second reflector 220 may be an integrally formed structure.

[0154] The embodiments of the present application do not limit this. It is only necessary to ensure that at least one group of the first mirror mount 110 and the first reflector 210, and the second mirror mount 120 and the second reflector 220 is an integrally formed structure.

[0155] It is clarified here that if the first mirror mount 110 and the first reflector 210 are an integrally formed structure, it can be considered that the first mirror mount 110 has a first reflecting surface 211. If the second mirror mount 120 and the second reflector 220 are an integrally formed structure, it can be considered that the second mirror mount 120 has a second reflecting surface 221.

[0156] In this way, it is possible to realize the integrated processing of the first mirror mount 110 and the first reflector 210, and the integrated processing of the second mirror mount 120 and the second reflector 220, reduce the optical elements required for the alignment of the telescopic device 10, and reduce the alignment difficulty of the telescopic device 10.

[0157] In some embodiments, the first mirror mount 110 and the second mirror mount 120 are a split structure. At this time. As Figure 5 shown, the first mirror mount 110 and the second mirror mount 120 are connected.

[0158] Exemplarily, as Figure 5As shown, mounting posts 111 are provided on the first frame 110. For example, mounting posts 111 are provided on the second support member 102. Mounting holes 121 are formed in the second frame 120.

[0159] Alternatively, exemplarily, mounting holes ( Figure 5 not shown in the figure) may be formed in the first frame 110, and mounting posts ( Figure 5 not shown in the figure) are provided on the second frame 120.

[0160] Among them, the mounting posts 111 are adhered in the mounting holes 121 to realize the bonding of the first frame 110 and the second frame 120.

[0161] In this way, the first frame 110 and the second frame 120 can be limited by the mounting posts 111 and the mounting holes 121, so that the alignment method of the telescopic device 10 becomes to adjust the relative position relationship between the first frame 110 and the second frame 120, reducing the alignment time of the telescopic device 10 and the optical elements to be aligned, and reducing the alignment cost.

[0162] In the embodiments of the present application, the materials of the first frame 110 and the second frame 120 may be the same or different, and the embodiments of the present application do not limit this.

[0163] Exemplarily, the thermal expansion coefficients of the materials of the first frame 110 and the second frame 120 are the same.

[0164] In this way, the heat conduction ability of the telescopic device 10 is improved, the influence of temperature on the first reflecting surface 211 and the second reflecting surface 221 can be reduced, and the temperature adaptability of the telescopic device 10 is improved.

[0165] Exemplarily, the first reflector 210 and the second reflector 220 may form an off-axis reflective telescopic device.

[0166] In the embodiments of the present application, as Figure 6A shown, one of the first reflector 210 and the second reflector 220 serves as the primary mirror, and the other serves as the secondary mirror.

[0167] It should be clarified here that, compared with the primary mirror and the secondary mirror, the size of the primary mirror is relatively large, and the size of the secondary mirror is relatively small.

[0168] Exemplarily, the first reflector 210 serves as the primary mirror, and the second reflector 220 serves as the secondary mirror.

[0169] That is to say, the clear aperture of the first reflecting surface 211 is larger than the clear aperture of the second reflecting surface 221.

[0170] For example, the clear aperture of the first reflector is greater than or equal to 50 mm, and the clear aperture of the second reflector is greater than or equal to 5 mm.

[0171] Alternatively, exemplarily, the first reflector 210 serves as the secondary mirror, and the second reflector 220 serves as the primary mirror.

[0172] That is to say, the clear aperture of the first reflecting surface 211 is smaller than that of the second reflecting surface 221.

[0173] The embodiments of the present application do not limit this, and it can be reasonably set according to the actual situation. For the convenience of illustration below, the first reflector 210 is used as the primary mirror and the second reflector 220 is used as the secondary mirror for description.

[0174] In this way, the primary mirror and its mirror mount are of an integrally formed structure, or the secondary mirror and its mirror mount are of an integrally formed structure.

[0175] That is to say, at least one of the primary mirror and its mirror mount and the secondary mirror and its mirror mount is of an integrally formed structure.

[0176] In the embodiments of the present application, the telescopic device 10 composed of the first reflecting surface 211 and the second reflecting surface 221 may be an afocal optical system. Alternatively, the telescopic device 10 composed of the first reflecting surface 211 and the second reflecting surface 221 may be a focal optical system. The embodiments of the present application do not limit this, and it can be reasonably set according to the actual situation.

[0177] It is explained here that the outgoing light of the afocal optical system is parallel light, and the outgoing light of the focal optical system has a focus.

[0178] In the embodiments of the present application, the telescopic device 10 composed of the first reflecting surface 211 and the second reflecting surface 221 may be a beam-reducing optical system. Alternatively, the telescopic device 10 composed of the first reflecting surface 211 and the second reflecting surface 221 may be a beam-expanding optical system. The embodiments of the present application do not limit this, and it can be reasonably set according to the actual situation.

[0179] It is explained here that the aperture of the outgoing light of the beam-reducing optical system is smaller than the aperture of the incident light beam, and the aperture of the outgoing light of the beam-expanding optical system is larger than the aperture of the incident light beam.

[0180] In the embodiments of the present application, the type of the outgoing light of the telescopic device 10 composed of the first reflecting surface 211 and the second reflecting surface 221 can be changed by adjusting the optical power and focal length of the first reflector 210 and the second reflector 220.

[0181] Among them, the first reflector 210 has a positive optical power. That is to say, the first reflector 210 has the function of converging light. Or rather, the first reflecting surface 211 has the function of converging light.

[0182] In some embodiments, such as Figure 6A shown, the first reflector 210 is a concave mirror, and the second reflector 220 is a convex mirror. At this time, the direction of the incident light incident on the first reflector 210 is the same as the direction of the outgoing light exiting from the second reflector 220.

[0183] It can be understood that the first reflecting surface 211 can also be any one of a convex surface, a concave surface, or a flat surface. The embodiments of the present application do not make any limitations in this regard, and it can be reasonably set according to the actual situation.

[0184] Exemplarily, the second reflecting surface 221 can also be any one of a convex surface, a concave surface, or a flat surface.

[0185] It is clarified here that the convex surface or the concave surface mentioned in the embodiments of the present application both refer to the convex surface or the concave surface at the paraxial region. It should be noted that the convex surface or the concave surface at the paraxial region means whether it is a convex surface or a concave surface at a position infinitely close to the optical axis of the lens. That is, the paraxial region refers to a position infinitely close to the optical axis. It should be noted that the shape of the lens and the concavity and convexity of the reflecting surface are only schematic and do not impose any limitations on the embodiments of the present application. The embodiments of the present application do not make any limitations on the concavity and convexity of the part of the reflecting surface far from the optical axis.

[0186] In some embodiments, both the first reflecting surface 211 and the second reflecting surface 221 are spherical surfaces. Or, both the first reflecting surface 211 and the second reflecting surface 221 are aspherical surfaces. For example, both the first reflecting surface 211 and the second reflecting surface 221 are free-form surfaces. Or, the first reflecting surface 211 and the second reflecting surface 221 can also be one spherical surface and the other aspherical surface (for example, a free-form surface).

[0187] An aspherical surface means that the surface shape does not change continuously from the center of the lens to the periphery of the lens. Among them, spherical lenses are easy to manufacture and have a low cost, which can reduce the cost of the telescopic device 10.

[0188] Exemplarily, both the first reflecting surface 211 and the second reflecting surface 221 are parabolic surfaces. In this way, the optical performance of the telescopic device 10 can be improved.

[0189] Such as Figure 6A shown, the first reflecting surface 211 and the second reflecting surface 221 are arranged opposite to each other.

[0190] In this way, the light reflected by the first reflecting surface 211 can be incident on the second reflecting surface 221.

[0191] Among them, the first reflecting surface 211 has a first rotational symmetry axis, and the second reflecting surface 221 has a second rotational symmetry axis.

[0192] Exemplarily, such as Figure 6BAs shown, the first rotation axis of symmetry coincides with the second rotation axis of symmetry. That is, the first rotation axis of symmetry of the first reflecting surface 211 coincides with the second rotation axis of symmetry of the second reflecting surface 221.

[0193] Among them, as Figure 6A shown, the first mirror 210 and the second mirror 220 are arranged on the same side of the first rotation axis of symmetry. That is, the first mirror 210 and the second mirror 220 are arranged on the same side of the second rotation axis of symmetry.

[0194] That is to say, when processing the first mirror 210 and the second mirror 220, the same set of processing references can be used to process the first reflecting surface 211 and the second reflecting surface 221 in sequence. In this way, the processing difficulty of the first mirror 210 and the second mirror 220 can be reduced, and the preparation accuracy of the first mirror 210 and the second mirror 220 can be improved. At the same time, the relative positional relationship between the first mirror holder 110 and the second mirror holder 120 can adopt integral processing.

[0195] In some embodiments, the ratio of the equivalent curvature k1 of the first mirror 210 to the equivalent curvature k2 of the second mirror 220 is equal to the ratio of the focal length f1 of the first mirror 210 to the focal length f2 of the second mirror 220 ( Figure 6B not shown in the figure), that is, k1:k2 = f1:f2. In this way, the first mirror and the second mirror can form an afocal beam - shrinking optical system.

[0196] Among them, the equivalent curvature of the first mirror 210 can be considered as the curvature obtained by fitting the curvatures of each point of the first reflecting surface 211. The equivalent curvature of the second mirror 220 can be considered as the curvature obtained by fitting the curvatures of each point of the second reflecting surface 221.

[0197] In some embodiments, as Figure 6B shown, the off - axis amount m1 of the first mirror 210 is greater than one - third of the equivalent curvature k1 of the first mirror 210, that is

[0198] Among them, the off - axis amount m1 of the first mirror 210 refers to the distance between the geometric center A of the first mirror 210 and the first rotation axis of symmetry of the first mirror 210.

[0199] That is to say, the distance m1 between the geometric center A of the first mirror 210 and the first rotation axis of symmetry of the first mirror 210 is greater than one - third of the equivalent curvature k1 of the first mirror 210.

[0200] Exemplarily, the height h1 of the first mirror 210 is less than half of the equivalent curvature k1 of the first mirror 210, that is

[0201] Among them, the height h1 of the first reflector 210 refers to the dimension of the first reflector 210 along the light incident direction, that is, the dimension of the first reflector 210 along the extension direction of the first rotation symmetry axis.

[0202] Exemplarily, the clear aperture d1 of the first reflecting surface 211 is greater than half of the equivalent curvature k1 of the first reflector 210, that is That is to say, the first reflector 210 satisfies the relationship:

[0203] Exemplarily, the off-axis amount m1 of the first reflector 210 is greater than the clear aperture d1 of the first reflecting surface 211, that is, m1 > d1.

[0204] Exemplarily, the off-axis amount m1 of the first reflector 210 is 65 mm to 75 mm. For example, the off-axis amount m1 of the first reflector 210 can be 65 mm, 68 mm, 70 mm, 72 mm or 75 mm, etc.

[0205] The equivalent curvature k1 of the first reflector 210 is 90 mm to 110 mm. For example, the equivalent curvature k1 of the first reflector 210 can be 90 mm, 95 mm, 100 mm, 105 mm or 110 mm, etc.

[0206] The height h1 of the first reflector 210 is 45 mm to 50 mm. For example, the height h1 of the first reflector 210 can be 45 mm, 47 mm, 49 mm or 50 mm, etc.

[0207] The clear aperture d1 of the first reflector 210 is 55 mm to 65 mm. For example, the clear aperture d1 of the first reflector 210 can be 55 mm, 58 mm, 60 mm, 63 mm or 65 mm, etc.

[0208] The embodiments of the present application do not limit the off-axis amount m1, equivalent curvature k1, height h1 and clear aperture d1 of the first reflector 210, and can be reasonably set according to actual situations.

[0209] In some embodiments, the off-axis amount m2 of the second reflector 220 is greater than one-third of the equivalent curvature k2 of the second reflector 220, that is

[0210] Among them, the off-axis amount m2 of the second reflector 220 refers to the distance between the geometric center B of the second reflector 220 and the second rotation symmetry axis of the second reflector 220.

[0211] That is, the distance m2 between the geometric center B of the second mirror 220 and the second rotation symmetry axis of the second mirror 220 is greater than one-third of the equivalent curvature k2 of the second mirror 220.

[0212] Exemplarily, the height h2 of the second mirror 220 is less than half of the equivalent curvature k2 of the second mirror 220, that is

[0213] wherein, the height h2 of the second mirror 220 refers to the dimension of the second mirror 220 along the extension direction of the second rotation symmetry axis.

[0214] Exemplarily, the clear aperture d2 of the second reflecting surface 221 is greater than half of the equivalent curvature k2 of the second mirror 220, that is That is, the second mirror 220 satisfies the relationship:

[0215] Exemplarily, the decentration m1 of the second mirror 220 is greater than the clear aperture d2 of the second reflecting surface 221, that is m2 > d2.

[0216] Exemplarily, the decentration m2 of the second mirror 220 is 6.5 mm to 7.5 mm. For example, the decentration m2 of the second mirror 220 can be 6.5 mm, 6.8 mm, 7 mm, 7.2 mm, or 7.5 mm, etc.

[0217] The equivalent curvature k2 of the second mirror 220 is 9 mm to 11 mm. For example, the equivalent curvature k2 of the second mirror 220 can be 9 mm, 9.5 mm, 10 mm, 10.5 mm, or 11 mm, etc.

[0218] The height h2 of the second mirror 220 is 4.5 mm to 5 mm. For example, the height h2 of the second mirror 220 can be 4.5 mm, 4.7 mm, 4.9 mm, or 5 mm, etc.

[0219] The clear aperture d2 of the second mirror 220 is 5.5 mm to 6.5 mm. For example, the clear aperture d2 of the second mirror 220 can be 5.5 mm, 5.8 mm, 6 mm, 6.3 mm, or 6.5 mm, etc.

[0220] The embodiments of the present application do not limit the decentration m2, equivalent curvature k2, height h2, and clear aperture d2 of the second mirror 220, and can be reasonably set according to actual situations.

[0221] Continue to refer to Figure 5 , and introduce the processing method of the telescopic device 10 provided by the embodiments of the present application. The processing method of the telescopic device 10 includes:

[0222] S11. Process the first frame 110 and the first mirror 210.

[0223] Exemplarily, in combination with precision machining, process the first frame 110 and the first mirror 210.

[0224] In the embodiments of the present application, the first frame 110 and the first mirror 210 can be processed separately and then assembled together. Alternatively, the first frame 110 and the first mirror 210 can also be processed simultaneously, and at this time, the first frame 110 and the first mirror 210 can be considered as an integrally formed structure. The embodiments of the present application do not limit this, and it can be reasonably set according to the actual situation.

[0225] Exemplarily, an installation post 111 is further provided on the first frame 110.

[0226] S12. Process the second frame 120 and the second mirror 220.

[0227] Exemplarily, in combination with precision machining, process the second frame 120 and the second mirror 220.

[0228] In the embodiments of the present application, the second frame 120 and the second mirror 220 can be processed separately and then assembled together. Alternatively, the second frame 120 and the second mirror 220 can also be processed simultaneously, and at this time, the second frame 120 and the second mirror 220 can be considered as an integrally formed structure. The embodiments of the present application do not limit this, and it can be reasonably set according to the actual situation.

[0229] Exemplarily, an installation hole 121 is further formed on the second frame 120.

[0230] In some embodiments, steps S11 and S12 can also be completed together. Exemplarily, the first frame 110 and the second frame 120 can be first turned, and then the first blank lens corresponding to the first frame 110 can be turned. Next, the second mirror 220 is turned, and then the first blank lens and the second mirror 220 are combined, and finally the first blank lens is processed to complete the processing of the first mirror 210 and the second mirror 220.

[0231] It should be noted here that the same set of machining references can be used for the processing of the first mirror 210 and the second mirror 220, which can reduce the machining difficulty of the first mirror 210 and the second mirror 220 and improve the preparation accuracy of the first mirror 210 and the second mirror 220. At the same time, the relative positions of the first frame 110 and the second frame 120 can be ensured through precision machining.

[0232] S13. Connect the first frame 110 and the second frame 120.

[0233] Exemplarily, the mounting post 111 of the first spectacle frame 110 is placed in the mounting hole 121 of the second spectacle frame 120.

[0234] It should be noted here that at this time, the mounting post 111 and the mounting hole 121 may not be fixedly connected first, and the fixed connection can be made after the optical path test and alignment are completed subsequently.

[0235] S14. Test and align the optical path.

[0236] In the embodiment of the present application, it is necessary to adjust the relative positions of the first reflector 210 and the second reflector 220. At this time, it is necessary to build a test environment to form a test optical path.

[0237] Exemplarily, as Figure 7 shown, an interferometer and test reflectors are used to form a test optical path with the first reflector 210 and the second reflector 220.

[0238] The test process includes: the light emitted by the interferometer passes through the first reflector 210 and the second reflector 220 in sequence and then reaches the test reflector, and then after being reflected by the test reflector, it is reflected by the second reflector 220 and the first reflector 210 in sequence. At this time, it is necessary to adjust the relative positions of the first reflector 210 and the second reflector 220 until the light can return to the interferometer along the original optical path and interfere with the outgoing light to complete the alignment.

[0239] It should be noted here that adjusting the relative positions of the first reflector 210 and the second reflector 220 is to adjust the positions of the first spectacle frame 110 or the second spectacle frame 120.

[0240] In the embodiment of the present application, the relative positions of the first reflector 210 and the second reflector 220 can also be tested by an optical interferometer or other optical devices. The present application does not limit this, and it can be reasonably set according to the actual situation.

[0241] S15. Fix the connection between the first spectacle frame 110 and the second spectacle frame 120.

[0242] After the optical path alignment in step S14 is completed, that is, the relative positions of the first spectacle frame 110 and the second spectacle frame 120 have been determined. At this time, the first spectacle frame 110 and the second spectacle frame 120 are fixedly connected.

[0243] Exemplarily, the mounting post 111 of the first spectacle frame 110 is adhered to the mounting hole 121 of the second spectacle frame 120 by using an adhesive. In the embodiment of the present application, the fixed connection between the first spectacle frame 110 and the second spectacle frame 120 can also be achieved by other connection methods. The present application does not limit this.

[0244] Thus, the alignment of the telescopic device 10 provided in the embodiment of the present application is completed. The alignment process of the telescopic device 10 provided in the embodiment of the present application is simple. Only the relative positions of the first mirror mount 110 and the second mirror mount 120 need to be adjusted, which can reduce the alignment cost of the telescopic device 10.

[0245] It should be noted here that for the above processing method provided in the embodiment of the present application, there is no limitation on the order of any steps, and it can be reasonably adjusted according to needs.

[0246] In addition, for the steps of S11 - S15 above, some of these steps can be removed according to needs, and it is not limited that each step must be included. Some steps can also be added according to needs, and it is not limited to only include the above steps.

[0247] In the telescopic device 10 provided in the embodiment of the present application, after the light is incident, it is reflected by the first reflecting surface 211 and the second reflecting surface 221 in sequence and then exits. The partial light source incident on the part of the first reflecting surface 211 close to the geometric center is reflected to the area of the second reflecting surface 221 close to the geometric center, while the partial light source incident on the part of the first reflecting surface 211 far from the geometric center is reflected to the area of the second reflecting surface 221 far from the geometric center. The solution of the embodiment of the present application can reduce the aberration between the incident light and the outgoing light and improve the imaging quality.

[0248] In addition, the first mirror mount 110 and the first reflecting mirror 210 can be integrally formed, or the second mirror mount 120 and the second reflecting mirror 220 can be integrally formed. Therefore, the first mirror mount 110 and the first reflecting mirror 210 can be processed integrally, and the second mirror mount 120 and the second reflecting mirror 220 can also be processed integrally, which can reduce the processing difficulty of the first reflecting mirror 210 and the second reflecting mirror 220 and improve the accuracy of the first reflecting mirror 210 and the second reflecting mirror 220.

[0249] In addition, in the solution of the embodiment of the present application, the first reflecting surface 211 is disposed on the first mirror mount 110, and the second reflecting surface 221 is disposed on the second mirror mount 120, so that when aligning the telescopic device 10, the position of the first mirror mount 110 or the second mirror mount 120 can be changed to change the transmission path of the light on the first reflecting surface 211 and the second reflecting surface 221, reducing the alignment difficulty of the telescopic device 10.

[0250] In some embodiments, as Figure 8 shown, the telescopic device 10 further includes a third reflecting mirror 230 having a third reflecting surface 231.

[0251] The third reflecting surface 231 is configured to transmit the light from the first reflecting surface 211 to the second reflecting surface 221. That is to say, after the light is reflected by the first reflecting surface 211, it is transmitted to the third reflecting surface 231, then reflected by the third reflecting surface 231 and transmitted to the second reflecting surface 221, and finally reflected by the second reflecting surface 221.

[0252] That is to say, along the transmission direction of the light, the third mirror 230 is disposed between the first mirror 210 and the second mirror 220.

[0253] Exemplarily, as Figure 8 shown, the first mirror 210 is a concave mirror and the second mirror 220 is a convex mirror. At this time, the direction of the incident light incident on the first mirror 210 is opposite to the direction of the outgoing light exiting from the second mirror 220.

[0254] As Figure 8 shown, the telescopic device 10 further includes a third mirror mount 130, and the third mirror 230 is disposed on the third mirror mount 130.

[0255] Exemplarily, the first mirror mount 110 and the second mirror mount 120 are the split structures described in the above embodiments.

[0256] Or, exemplarily, as Figure 8 shown, the first mirror mount 110 and the second mirror mount 120 are integrally formed structures.

[0257] In this way, the first mirror 210, the second mirror 220, the first mirror mount 110, and the second mirror mount 120 can be completed in the same processing step, which can improve the accuracy of the first mirror 210 and the second mirror 220, and avoid adjusting the relative relationship between the first mirror 210 and the second mirror 220, making the adjustment of the telescopic device 10 simple and capable of reducing the adjustment cost of the telescopic device 10.

[0258] In the embodiments of the present application, the third mirror mount 130 and the third mirror 230 may be integrally formed structures. Or, the third mirror mount 130 and the third mirror 230 may not be integrally formed structures. The embodiments of the present application do not make any limitations in this regard.

[0259] If the third mirror mount 130 and the third mirror 230 are integrally formed structures, it can be considered that the third mirror mount 130 and the third mirror 230. It should be clarified here that the integrally formed structure of the third mirror mount 130 and the third mirror 230 can achieve the integrated processing of the third mirror mount 130 and the third mirror 230, reducing the adjustment difficulty.

[0260] In some embodiments, as Figure 8As shown, the third lens frame 130 can be fixedly connected to the second lens frame 120. For example, the third lens frame 130 can be adhesively connected to the second lens frame 120. In the embodiments of the present application, the manner of fixedly connecting the third lens frame 130 and the second lens frame 120 is not limited, and it can be reasonably set according to the actual situation.

[0261] In the embodiments of the present application, the materials of the first lens frame 110, the second lens frame 120, and the third lens frame 130 can be the same or different, and the embodiments of the present application do not limit this.

[0262] Exemplarily, the coefficients of thermal expansion of the materials of the first lens frame 110, the second lens frame 120, and the third lens frame 130 are the same.

[0263] In this way, the heat conduction ability of the telescopic device 10 is improved, the influence of temperature on the first reflecting surface 211, the second reflecting surface 221, and the third reflecting surface 231 can be reduced, and the temperature adaptability of the telescopic device 10 is improved.

[0264] Exemplarily, as Figure 9 shown, the third reflecting surface 231 is a plane. That is to say, the third reflecting mirror 230 is a plane mirror.

[0265] The third reflecting mirror 230 is used to fold light, that is, to change the transmission path of light.

[0266] As Figure 9 shown, the first reflecting surface 211 and the second reflecting surface 221 are arranged in the same direction.

[0267] In this way, the light reflected by the first reflecting surface 211 is incident on the third reflecting surface 231, and then is reflected by the third reflecting surface 231 and transmitted to the second reflecting surface 221.

[0268] Continuing to refer to Figure 9 , the light includes a first light beam c1 and a second light beam c2.

[0269] As Figure 9 shown, the distance between the position where the first light beam c1 is incident on the first reflecting surface 211 and the geometric center A of the first reflecting surface 211 is greater than the distance between the position where the second light beam c2 is incident on the first reflecting surface 211 and the geometric center A of the first reflecting surface 211.

[0270] As Figure 9 shown, the distance between the position where the first light beam c1 is incident on the second reflecting surface 221 and the geometric center B of the second reflecting surface 221 is greater than the distance between the position where the second light beam c2 is incident on the second reflecting surface 221 and the geometric center B of the second reflecting surface 221.

[0271] Continue to refer to Figure 9 The first reflecting surface 211 and the second reflecting surface 221 are respectively arranged on opposite sides of the first rotation symmetry axis. That is to say, the first reflecting surface 211 and the second reflecting surface 221 are respectively arranged on opposite sides of the second rotation symmetry axis.

[0272] Among them, the distance between the position where the first light beam c1 is incident on the first reflecting surface 211 and the first rotation symmetry axis is greater than the distance between the position where the second light beam c2 is incident on the first reflecting surface 211 and the first rotation symmetry axis.

[0273] The distance between the position where the first light beam c1 is incident on the second reflecting surface 221 and the second rotation symmetry axis is greater than the distance between the position where the second light beam c2 is incident on the 221 position of the second reflecting surface and the second rotation symmetry axis.

[0274] That is to say, as Figure 9 shown, the first light beam c1 is reflected from the edge of the first reflecting surface 211 on the side far from the first rotation symmetry axis to the edge of the second reflecting surface 221 on the side far from the second rotation symmetry axis. The second light beam c2 is reflected from the edge of the first reflecting surface 211 on the side close to the first rotation symmetry axis to the edge of the second reflecting surface 221 on the side close to the second rotation symmetry axis.

[0275] Exemplarily, as Figure 9 shown, the light rays further include a third light beam c3. The third light beam c3 is reflected from the center of the light passing hole of the first reflecting mirror 210 to the center of the light passing hole of the second reflecting mirror 220.

[0276] That is to say, the light rays include multiple light beams. Some of the light beams incident on the edge of the light passing hole of the first reflecting mirror 210 are still transmitted to the edge of the light passing hole of the second reflecting mirror 220 after being reflected by the first reflecting mirror 210. Some of the light beams incident on the center of the light passing hole of the first reflecting mirror 210 are still transmitted to the center of the light passing hole of the second reflecting mirror 220 after being reflected by the first reflecting mirror 210. Or rather, some of the light sources incident on the first reflecting surface 211 close to the geometric center are reflected to the area close to the geometric center of the second reflecting surface 221, while some of the light sources incident on the first reflecting surface 211 far from the geometric center are reflected to the area far from the geometric center of the second reflecting surface 221. The telescopic device 10 provided by the embodiment of the present application does not change the relative positions of the incident light on the first reflecting mirror 210 and the second reflecting mirror 220, and reduces the aberration between the incident light and the outgoing light.

[0277] Exemplarily, the first rotation symmetry axis of the first reflecting surface 211 coincides with the second rotation symmetry axis of the second reflecting surface 221.

[0278] In this way, the processing difficulty of the first reflector 210 and the second reflector 220 is reduced, the preparation precision of the first reflector 210 and the second reflector 220 can be improved, and the off-axis amount of the first reflector 210 and the second reflector 220 can be reduced.

[0279] The introduction of the first reflecting surface 211 and the second reflecting surface 221 is the same as that in the embodiment, and the specific description can refer to the relevant description of the above embodiment, which will not be repeated here.

[0280] Next, the processing method of the telescopic device 10 provided in the embodiment of the present application will be introduced. The processing method of the telescopic device 10 includes:

[0281] S21. Process the first mirror frame 110, the first reflector 210, the second mirror frame 120 and the second reflector 220.

[0282] In some embodiments, the first mirror frame 110 and the second mirror frame 120 can be processed separately and then assembled together.

[0283] The specific process of processing is the same as that of processing the first mirror frame 110, the first reflector 210, the second mirror frame 120 and the second reflector 220 in the embodiment, and the specific steps can refer to step S11 and step S12 in the above embodiment, which will not be repeated here.

[0284] In other embodiments, the first mirror frame 110 and the second mirror frame 120 are integrally formed structures.

[0285] Exemplarily, in combination with precision machining, the first mirror frame 110 and the first reflector 210, and the second mirror frame 120 and the second reflector 220 are processed.

[0286] It should be noted here that the mirror frames (the above-mentioned first mirror frame 110 and second mirror frame 120) can be processed first, then the first reflector 210 and the second reflector 220 can be processed, and finally the first reflector 210 and the second reflector 220 can be assembled with the mirror frames. Or, the mirror frames, the first reflector 210 and the second reflector 220 can also be processed simultaneously, and in this case, it can be considered that the mirror frames and the first reflector 210 and the second reflector 220 are integrally formed structures. The embodiment of the present application does not limit this, and it can be reasonably set according to the actual situation.

[0287] Exemplarily, an installation post (not shown in the figure) is further provided on the second mirror frame 120. The installation post is used to assemble the third mirror frame 130 processed later.

[0288] It should be noted here that the first mirror 210 and the second mirror 220 can be processed using the same set of processing references, which can reduce the processing difficulty of the first mirror 210 and the second mirror 220, and improve the preparation accuracy of the first mirror 210 and the second mirror 220. At the same time, the relative positions of the first mirror holder 110 and the second mirror holder 120 can be ensured through precision machining, avoiding the adjustment of the relative positions of the first mirror 210 and the second mirror 220, and reducing the assembly and adjustment costs.

[0289] S22. Machine the third mirror holder 130 and the third mirror 230.

[0290] Exemplarily, in combination with precision machining, the third mirror holder 130 and the third mirror 230 are machined.

[0291] In the embodiments of the present application, the third mirror holder 130 and the third mirror 230 can be machined separately and then assembled together. Alternatively, the third mirror holder 130 and the third mirror 230 can also be machined simultaneously, and at this time, the third mirror holder 130 and the third mirror 230 can be considered as an integrally formed structure. The embodiments of the present application do not limit this, and it can be reasonably set according to the actual situation.

[0292] Exemplarily, the third mirror holder 130 is also provided with mounting holes (not shown in the figure).

[0293] S23. Connect the third mirror holder 130 and the second mirror holder 120.

[0294] Exemplarily, the mounting posts of the second mirror holder 120 are placed in the mounting holes of the third mirror holder 130.

[0295] It should be noted here that at this time, the mounting posts and the mounting holes may not be fixedly connected first, and they can be fixedly connected after the subsequent optical path test and adjustment are completed.

[0296] S24. Test and adjust the optical path.

[0297] In the embodiments of the present application, it is necessary to adjust the relative positions of the third mirror 230, the first mirror 210, and the second mirror 220. At this time, a test environment needs to be set up to form a test optical path.

[0298] Exemplarily, as Figure 10 shown, an interferometer and test mirrors are used to form a test optical path with the first mirror 210, the second mirror 220, and the third mirror 230.

[0299] The testing process includes: the light emitted by the interferometer sequentially passes through the first mirror 210, the third mirror 230, and the second mirror 220 and then reaches the test mirror. After being reflected by the test mirror, it is then reflected by the second mirror 220 and the first mirror 210 in sequence. At this time, the relative positions of the first mirror 210 and the second mirror 220 need to be adjusted until the light can return to the interferometer along the original optical path and interfere with the outgoing light to complete the alignment and adjustment.

[0300] It is clarified here that adjusting the relative positions of the third mirror 230 with the first mirror 210 and the second mirror 220 is to adjust the position of the third mirror mount 130.

[0301] In the embodiments of the present application, the relative positions of the first mirror 210 and the second mirror 220 can also be tested by an optical interferometer or other optical devices. The embodiments of the present application do not limit this, and it can be reasonably set according to the actual situation.

[0302] S25. Fix the connection between the second mirror mount 120 and the third mirror mount 130.

[0303] After the optical path alignment and adjustment in step S24, that is, after the relative positions of the third mirror 230 with the first mirror 210 and the second mirror 220 have been determined, the second mirror mount 120 and the third mirror mount 130 are fixedly connected at this time.

[0304] Exemplarily, the mounting post of the second mirror mount 120 is adhered to the mounting hole of the third mirror mount 130 using an adhesive. In the embodiments of the present application, the fixed connection between the second mirror mount 120 and the third mirror mount 130 can also be achieved by other connection methods. The embodiments of the present application do not limit this.

[0305] Thus, the alignment and adjustment of the telescopic device 10 provided by the embodiments of the present application are completed. The alignment and adjustment process of the telescopic device 10 provided by the embodiments of the present application is simple. Only the position of the third mirror mount 130 needs to be adjusted so that the light from the first mirror 210 is reflected by the third mirror 230 and then incident on the second mirror 220, reducing the alignment and adjustment cost of the telescopic device 10.

[0306] It is clarified here that the above processing method provided by the embodiments of the present application does not limit any step sequence and can be reasonably adjusted according to needs.

[0307] In addition, for the steps of S21 - S25 above, some of the steps can be removed according to needs, and it is not limited that each step must be included. Some steps can also be added according to needs, and it is not limited to only including the above steps.

[0308] Such as Figure 11As shown in the figure, a communication terminal is schematically shown. The front optical path of the communication terminal includes the telescopic device 10 schematically shown in the embodiment. The turntable part 20 and the rear optical path part 30 are the same as those described above. For specific details, reference can be made to the description of the turntable part 20 and the rear optical path part 30 above, and details will not be repeated here.

[0309] In the telescopic device 10 provided in the embodiment of the present application, a plane mirror (i.e., the third mirror 230) is added between the transmission paths of the first mirror 210 and the second mirror 220. By using the third reflecting surface 231 to change the transmission direction of light, the size of the telescopic device 10 can be reduced. At the same time, in the embodiment of the present application, the first mirror frame 110 and the second mirror frame 120 are of an integrally formed structure. Therefore, when adjusting the telescopic device 10, only the third mirror frame 130 needs to be adjusted to change the relative positions of the third mirror frame 130 with the first mirror frame 110 and the second mirror frame 120. The adjustment is simple and the adjustment cost is reduced.

[0310] In some other embodiments, as Figure 12 shown, the telescopic device 10 includes a first mirror frame 110, a first mirror 210 disposed on the first mirror frame 110, a second mirror frame 120, and a second mirror 220 disposed on the second mirror frame 120. Among them, the first mirror 210 includes a first reflecting surface 211, and the second mirror 220 includes a second reflecting surface 221.

[0311] As Figure 12 shown, the telescopic device 10 further includes a third mirror frame 130 and a third mirror 230. Among them, the third mirror 230 is disposed on the third mirror frame 130. The third mirror 230 includes a third reflecting surface 231.

[0312] In some embodiments, the first mirror frame 110 and the first mirror 210 are of an integrally formed structure, the second mirror frame 120 and the second mirror 220 are of an integrally formed structure, and the third mirror frame 130 and the third mirror 230 are of an integrally formed structure.

[0313] In this way, the first mirror frame 110 and the first mirror 210, the second mirror frame 120 and the second mirror 220, and the third mirror frame 130 and the third mirror 230 can all be completed in the same processing step, which can improve the accuracy of the first mirror 210, the second mirror 220, and the third mirror 230.

[0314] In some embodiments, as Figure 12 shown, the first mirror frame 110 and the second mirror frame 120 are of an integrally formed structure.

[0315] Exemplarily, the first mirror frame 110, the second mirror frame 120, the first mirror 210, and the second mirror 220 are all of an integrally formed structure.

[0316] In this way, the accuracy of the first reflector 210 and the second reflector 220 can be improved, and the assembly and adjustment cost of the telescopic device 10 can be reduced.

[0317] In the embodiment of the present application, the connection manner of the third mirror holder 130 with the first mirror holder 110 and the second mirror holder 120 can be the same as the connection manner in the above embodiment. For details, reference can be made to the relevant description in the embodiment, which will not be elaborated here.

[0318] Exemplarily, as Figure 13 shown, light is incident on the first reflection surface 211 of the first reflector 210, and after being reflected by the first reflection surface 211, it is transmitted to the third reflector 230. Then, after being reflected by the third reflection surface 231 of the third reflector 230, it is transmitted to the second reflector 220, and finally, after being reflected by the second reflection surface 221 of the second reflector 220, it is output.

[0319] As Figure 13 shown, in the embodiment of the present application, the first reflector 210, the second reflector 220, and the third reflector 230 form an afocal beam-shrinking optical system. Parallel light is incident on the first reflector 210, and finally, parallel light is emitted from the second reflector 220, and the emitted parallel light is beam-shrunk compared with the incident parallel light.

[0320] Among them, the first reflector 210, the second reflector 220, and the third reflector 230 are staggeredly arranged. The incident light and the emitted light are not parallel and have a certain included angle.

[0321] The first reflector 210, the second reflector 220, and the third reflector 230 can also form a focusing optical system. Or, it can also form a beam-expanding optical system. The embodiment of the present application does not limit this, and it can be reasonably set according to the actual situation.

[0322] The descriptions of the first reflector 210 and the second reflector 220 can be the same as those in the above embodiment. Or, they can also be different. The embodiment of the present application does not limit this.

[0323] Exemplarily, the third reflection surface 231 can be a spherical surface. Or, the third reflection surface 231 can also be an aspherical surface.

[0324] For example, the third reflection surface 231 can be a free-form surface. In this way, the design freedom of the telescopic device 10 can be improved, and the optical performance of the telescopic device can be enhanced.

[0325] It can be understood that the third reflection surface 231 can be any one of a convex surface, a concave surface, or a flat surface. The embodiment of the present application does not limit this, and it can be reasonably set according to the actual situation.

[0326] In some embodiments, a plurality of third reflectors 230 (not shown in the figure) may also be provided on the third mirror frame 130. Among them, the plurality of third reflectors 230 can be processed simultaneously with the third mirror frame 130.

[0327] The processing method of the telescopic device 10 provided in the embodiments of the present application will be introduced below. The processing method of the telescopic device 10 includes:

[0328] S31. Process the first mirror frame 110, the first reflector 210, the second mirror frame 120, and the second reflector 220.

[0329] The processing process in step S31 is similar to the processing process in the above step S21. Specifically, reference can be made to the relevant description of step S21 in the above embodiments, and details will not be repeated here.

[0330] S32. Process the third mirror frame 130 and the third reflector 230.

[0331] The processing process in step S32 is similar to the processing process in the above step S22. Specifically, reference can be made to the relevant description of step S22 in the above embodiments, and details will not be repeated here.

[0332] S33. Connect the third mirror frame 130 and the second mirror frame 120.

[0333] Exemplarily, the mounting post of the second mirror frame 120 can be placed in the mounting hole of the third mirror frame 130.

[0334] S34. Test and adjust the optical path.

[0335] Exemplarily, as Figure 14 shown, an interferometer and a test reflector are used to form a test optical path with the first reflector 210, the second reflector 220, and the third reflector 230.

[0336] The test process is similar to the test process in the above step S34. Specifically, reference can be made to the relevant description of step S34 in the above embodiments, and details will not be repeated here.

[0337] S35. Fix the connection between the second mirror frame 120 and the third mirror frame 130.

[0338] After the optical path is adjusted in step S34, that is, the relative positions of the third reflector 230, the first reflector 210, and the second reflector 220 have been determined. At this time, the second mirror frame 120 and the third mirror frame 130 are fixedly connected.

[0339] Exemplarily, the second mirror frame 120 and the third mirror frame 130 are bonded and fixed using an adhesive.

[0340] Thus, the alignment of the telescopic device 10 provided in the embodiments of the present application is completed. The alignment process of the telescopic device 10 provided in the embodiments of the present application is simple. Only the position of the third mirror holder 130 needs to be adjusted so that the light from the first reflector 210 is reflected by the third reflector 230 and then incident on the second reflector 220, reducing the alignment cost of the telescopic device 10.

[0341] It can be understood that for the case where the telescopic device 10 includes more than three reflectors, the mirror holders of the reflectors can be divided into two groups for processing to reduce the mirror holder structure to be adjusted during assembly, reduce the alignment difficulty of the telescopic device 10, and improve the alignment efficiency.

[0342] It is clarified here that there is no limitation on the order of any steps in the above processing method provided in the embodiments of the present application, and it can be reasonably adjusted according to needs.

[0343] In addition, for the steps S31 - S35 above, some of the steps can be removed according to needs, and it is not limited that each step must be included. Some steps can also be added according to needs, and it is not limited to only include the above steps.

[0344] As Figure 15 shown, a communication terminal is schematically illustrated. The front optical path of the communication terminal includes the telescopic device 10 schematically illustrated in the embodiment. The turntable part 20 and the rear optical path part 30 are the same as above. For details, reference can be made to the description of the turntable part 20 and the rear optical path part 30 above, and details will not be repeated here.

[0345] In the telescopic device 10 provided in the embodiments of the present application, a reflector (i.e., the third reflector 230) is added between the transmission paths of the first reflector 210 and the second reflector 220. By using the third reflecting surface 231 to change the transmission direction of the light, the size of the telescopic device 10 can be reduced, the design freedom of the telescopic device 10 can be improved, and the optical performance of the telescopic device 10 can be enhanced. At the same time, in the embodiments of the present application, the first mirror holder 110 and the second mirror holder 120 are integrally formed structures. Therefore, when aligning the telescopic device 10, only the third mirror holder 130 needs to be adjusted to change the relative positions of the third mirror holder 130 with the first mirror holder 110 and the second mirror holder 120, reducing the alignment difficulty, improving the alignment efficiency, and reducing the alignment cost.

[0346] The above are only specific embodiments of the present application, but the protection scope of the present application is not limited thereto. Any changes or substitutions within the technical scope disclosed in the present application should be covered by the protection scope of the present application. Therefore, the protection scope of the present application should be subject to the protection scope of the claimed rights.

Claims

1. A telescopic device, characterized in that, Applied to an optical antenna, comprising: a first reflector and a second reflector; the first reflector and the second reflector form an off-axis optical system; The first reflector has a first reflecting surface; The second reflector has a second reflecting surface; Wherein, light is incident on the first reflecting surface, reflected by the first reflecting surface and then transmitted to the second reflecting surface, and then exits after being reflected by the second reflecting surface; The light includes a first light beam and a second light beam; the distance between the position where the first light beam is incident on the first reflecting surface and the geometric center of the first reflecting surface is greater than the distance between the position where the second light beam is incident on the first reflecting surface and the geometric center of the first reflecting surface, and the distance between the position where the first light beam is incident on the second reflecting surface and the geometric center of the second reflecting surface is greater than the distance between the position where the second light beam is incident on the second reflecting surface and the geometric center of the second reflecting surface.

2. The telescopic device according to claim 1, wherein The first reflector is a concave mirror, and the second reflector is a convex mirror.

3. The telescopic device according to claim 1 or 2, characterized in that, The direction of the incident light incident on the first reflector is the same as the direction of the outgoing light exiting from the second reflector.

4. The telescopic device according to any one of claims 1-3, characterized in that, The first reflecting surface has a first axis of rotational symmetry, and the second reflecting surface has a second axis of rotational symmetry; the first axis of rotational symmetry and the second axis of rotational symmetry are parallel to the direction of the incident light, and the first axis of rotational symmetry is offset from the first reflecting surface; the second axis of rotational symmetry is offset from the second reflecting surface; the first reflector and the second reflector are arranged on the same side of the first axis of rotational symmetry.

5. The telescopic device according to claim 1, wherein, The first reflector is a concave mirror, and the second reflector is a concave mirror.

6. The telescopic device according to claim 5, wherein, The telescopic device further includes a third reflector, and the third reflector has a third reflecting surface; the third reflecting surface is a plane, and the third reflecting surface is used to transmit the light from the first reflecting surface to the second reflecting surface; The direction of the incident light incident on the first reflector is opposite to the direction of the outgoing light exiting from the second reflector.

7. The telescopic device according to claim 1, 5 or 6, characterized in that, The first reflecting surface has a first axis of rotational symmetry, and the second reflecting surface has a second axis of rotational symmetry; the first axis of rotational symmetry and the second axis of rotational symmetry are parallel to the direction of the incident light, and the first axis of rotational symmetry is offset from the first reflecting surface; the second axis of rotational symmetry is offset from the second reflecting surface; the first reflector and the second reflector are respectively arranged on opposite sides of the first axis of rotational symmetry.

8. The telescopic device according to claim 7, wherein The first axis of rotational symmetry and the second axis of rotational symmetry coincide.

9. The telescopic device according to any one of claims 1-8, characterized in that, The clear aperture of the first reflector is greater than or equal to 50 mm, and the clear aperture of the second reflector is greater than or equal to 5 mm.

10. The telescopic device according to any one of claims 1-9, characterized in that, The ratio of the equivalent curvature of the first reflector to the equivalent curvature of the second reflector is equal to the ratio of the focal length of the first reflector to the focal length of the second reflector.

11. The telescopic device according to any one of claims 1-10, characterized in that, The off-axis amount of the first reflector is greater than one-third of the equivalent curvature of the first reflector.

12. The telescopic device according to any one of claims 1-11, characterized in that, The dimension of the first reflector along the direction of the incident light is less than half of the equivalent curvature of the first reflector.

13. The telescopic device according to any one of claims 1 to 12, characterized in that, The light-transmitting aperture of the first reflecting surface is greater than half of the equivalent curvature of the first mirror.

14. The telescopic device according to claim 1, characterized in that, The telescopic device further includes a third mirror having a third reflecting surface; the third reflecting surface is a free-form surface and is configured to transmit the light from the first reflecting surface to the second reflecting surface.

15. The telescopic device according to any one of claims 1-14, characterized in that, The telescopic device further includes a first mirror mount and a second mirror mount; the first mirror mount includes a first support member and a second support member connected to each other. The first mirror is disposed on the first support member. The second support member extends along the direction of the incident light, and the second support member is configured to support the second mirror mount; the second mirror is disposed on the second mirror mount.

16. The telescopic device according to claim 15, wherein the first mirror mount and the first mirror are of an integrally formed structure; and / or the second mirror mount and the second mirror are of an integrally formed structure.

17. The telescopic device according to claim 15 or 16, characterized in that, The first mirror mount and the second mirror mount are bonded.

18. The telescopic device according to any one of claims 15-17, characterized in that, An installation post is provided on the second support member, and an installation hole is defined in the second mirror mount; the installation post is adhesively fixed in the installation hole.

19. The telescopic device according to claim 15 or 16, characterized in that, The first mirror mount and the second mirror mount are of an integrally formed structure.

20. The telescopic device according to any one of claims 1-19, characterized in that, The thermal expansion coefficient of the material of the first mirror mount is the same as that of the material of the second mirror mount.

21. An optical module, characterized in that, Comprising a light source and the telescopic device according to any one of claims 1-20; the light source is configured to provide light for the telescopic device.

22. A communication terminal, characterized in that, Comprising the optical module according to claim 21 and a light deflection assembly; the light deflection assembly is configured to transmit light into the optical module.

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