Optical light splitting device, V-shaped light path system and light splitting method

Abstract

The invention relates to the technical field of light splitting, in particular to an optical light splitting device, a V-shaped light path system and a light splitting method.The three rectangular faces of a triangular prism frame in the optical light splitting device are provided with light passing grooves corresponding to a first light splitting mirror chamber, a second light splitting mirror chamber and a reflector chamber respectively; the first spectroscope chamber, the second spectroscope chamber and the reflector chamber are respectively connected with three rectangular surfaces of the triangular prism frame, and the first adjusting device, the second adjusting device and the third adjusting device are correspondingly arranged among the first spectroscope chamber, the second spectroscope chamber, the reflector chamber and the triangular prism frame. The first spectroscope, the second spectroscope and the reflector are correspondingly connected with the first spectroscope chamber, the second spectroscope chamber and the reflector chamber, a light path occupying a three-layer space is optimized into a V-shaped light path occupying a two-layer space, and the two-layer light path structure is more compact than a three-layer light path structure; the problems of large light path transmission volume, large occupied space and the like of a traditional cross-shaped light splitting system are solved.

Description

Technical Field

[0001] The present invention relates to the field of spectroscopy technology, and particularly relates to an optical spectroscopy device, a V-shaped optical path system and a spectroscopy method. Background Art

[0002] With the development of optical application technology, optical systems are increasingly applied to fields such as aerospace, military, and communication. However, in some fields, such as airborne optical systems, due to the extremely limited internal space of the aircraft itself, there are strict restrictions on the size and weight of the airborne optical system. Therefore, higher requirements are put forward for the lightweight and miniaturized design of the optical system structure. In an optical system, due to size limitations, it is necessary to deflect and adjust the transmission and reflection relationship of some optical axes. Therefore, mirrors and beam splitters are used to adjust the optical axes. However, using too many mirrors and beam splitters will reduce the system transmittance and the beam wavefront quality, and increase the volume and weight of the optical system. In an airborne optical system, the reference light representing the optical axis is emitted through a collimating lens, and the light is split by a beam splitter. One path of the light is reflected to a monitoring camera, and the other path of the light passes through the beam splitter and is emitted into a laser input window. At the same time, the input light emitted from the laser window needs to be reflected by the above-mentioned beam splitter in the opposite direction of the monitoring camera, forming a cross in the optical path of the optical system, occupying three layers of optical path channels. This optical path design is not conducive to the lightweight and miniaturized design of the optical system.

[0003] Chinese Patent with Publication No. CN102185659A discloses a quantum communication ATP fine tracking system with optical axis self-calibration and a calibration method. It builds a quantum communication ATP fine tracking system through system components such as a quantum laser, a self-calibration high-intensity laser, an optical fiber combiner, an aspheric collimating lens, a band-pass filter, a corner cube prism, a dichroic mirror, a double-peak filter, a fine tracking camera, an aspheric focusing lens, a fine tracking fast steering mirror, and a receiving telescope, realizing the overall design of a two-transmission and one-reception optical system. However, it does not optimize the occupied space and the overall weight of the optical system. Its optical path forms a cross in the optical system, belonging to a traditional cross beam splitting system (such as Figure 1As shown in the figure, three layers of space are required to arrange these system components. By reasonably designing the beam splitting device within the entire system, it is possible to reduce the number of space layers occupied by its system components while ensuring the system functions, greatly reducing the occupied space and weight of the entire optical system and improving the light and miniaturized level of the optical system. Chinese Patent Publication No. CN116027539A discloses a laser communication advanced aiming system and method. The system includes two transmitting optical components and one receiving optical component. The optical path of its fine tracking system also forms a cross in the entire system, occupying three layers of optical path channels. It also belongs to the traditional cross beam splitting system and requires three layers of space to arrange the components of its fine tracking system. This patent does not optimize the space and weight occupied by the fine tracking system. By reasonably designing the beam splitting device in the system, it is also possible to reduce the number of layers occupied by the system components while ensuring the fine tracking function of the system, reducing the space and weight occupied by the fine tracking system, providing more space for the subsequent structural arrangement of the entire aiming system, and improving the light and miniaturized level of the system.

[0004] Therefore, a beam splitting device is needed that can optimize the optical path of the above traditional cross beam splitting system, so that the occupied space, volume and weight of the system after optimizing the optical path can be reduced, and the light and miniaturized of the system can be realized. Summary of the Invention

[0005] Therefore, the technical problem to be solved by the present invention is to overcome the defects in the prior art, so as to provide an optical beam splitting device, a V-shaped optical path system and a beam splitting method.

[0006] An optical beam splitting device includes: a first beam splitter, a first beam splitter chamber, a first adjusting device, a second beam splitter, a second beam splitter chamber, a second adjusting device, a reflector, a reflector chamber, a third adjusting device and a triangular prism frame;

[0007] On the three rectangular faces of the triangular prism frame, light passing grooves corresponding to the first beam splitter chamber, the second beam splitter chamber and the reflector chamber are respectively arranged. The first beam splitter chamber, the second beam splitter chamber and the reflector chamber are respectively connected to the three rectangular faces of the triangular prism frame, and the first adjusting device, the second adjusting device and the third adjusting device are correspondingly arranged between the first beam splitter chamber, the second beam splitter chamber and the reflector chamber and the triangular prism frame. The surface where the reflector chamber is located is parallel to the ground, and the first beam splitter, the second beam splitter and the reflector are correspondingly connected to the first beam splitter chamber, the second beam splitter chamber and the reflector chamber.

[0008] Further, the two triangular faces of the triangular prism frame are equilateral triangles with the same specifications.

[0009] Further, the first adjusting device, the second adjusting device and the third adjusting device are all metal gaskets, and circular bosses are arranged on the metal gaskets.

[0010] Further, three screw mounting holes distributed in a triangle are provided on the first beam splitter chamber, the second beam splitter chamber and the mirror chamber, and the first beam splitter chamber, the second beam splitter chamber and the mirror chamber are fixedly connected to the triangular prism frame by screws.

[0011] The present invention further includes a V-shaped optical path system, which includes the above-mentioned optical beam splitting device, a monitoring camera, a collimating lens, a laser input window and a subsequent optical path;

[0012] The monitoring camera is arranged on the left side of the first beam splitter, the subsequent optical path is arranged on the right side of the second beam splitter, the monitoring camera is arranged at the upper left of the first beam splitter, and the collimating lens is arranged at the upper right of the second beam splitter.

[0013] Further, the included angle between the optical axis of the monitoring camera and the mirror surface of the first beam splitter is 120°, the included angle between the optical axis of the subsequent optical path and the mirror surface of the second beam splitter is 120°, the included angle between the optical axis of the collimating lens and the mirror surface of the first beam splitter is 60°, and the included angle between the optical axis of the laser input window and the mirror surface of the second beam splitter is 60°.

[0014] The present invention further includes a beam splitting method, which is realized based on the V-shaped optical path system. The collimating lens emits light. One path of light is reflected by the first beam splitter to the monitoring camera; the other path of light passes through the first beam splitter and is incident on the mirror, and then passes through the second beam splitter and is incident on the laser input window. The laser input window emits input light, and the input light is reflected by the second beam splitter to the subsequent optical path.

[0015] The device designed by the present invention can optimize the optical path that originally needed to occupy three layers of space into a V-shaped optical path that occupies two layers of space by the specific positions of the beam splitters and the mirrors. In terms of space, the two-layer optical path structure is more compact than the three-layer optical path structure, reducing the overall volume of the optical path system; in addition, the structural design of the two-layer optical path will also reduce the material usage of the support structure and the housing, further reducing the weight of the entire optical system, and better meeting the design requirements of the airborne optical system for lightness and miniaturization. The overall frame of this device is a triangular prism frame, which has better stability compared with the traditional beam splitter and mirror structure. When the system encounters some external environmental factors, this structure can better ensure the overall operation of the system. Description of the Drawings

[0016] In order to more clearly illustrate the specific embodiments of the present invention or the technical solutions in the prior art, the following will briefly introduce the drawings required for the description of the specific embodiments or the prior art. Obviously, the following drawings are some embodiments of the present invention. For those of ordinary skill in the art, other drawings can be obtained based on these drawings without creative efforts.

[0017] Figure 1 It is a schematic diagram of a three-layer cross optical path system in the prior art;

[0018] Figure 2 It is a schematic structural diagram of an optical splitting device in the present invention;

[0019] Figure 3 It is a schematic structural diagram of a V-shaped optical path system in the present invention.

[0020] Explanation of reference numerals:

[0021] 1 - First beam splitter; 2 - First beam splitter chamber; 3 - First adjusting device; 4 - Second beam splitter; 5 - Second beam splitter chamber; 6 - Second adjusting device; 7 - Reflecting mirror; 8 - Reflecting mirror chamber; 9 - Third adjusting device; 10 - Prism frame; 11 - Detection camera; 12 - Collimating lens; 13 - Laser input window; 14 - Subsequent optical path. Detailed implementation manners

[0022] Next, the technical solutions of the present invention will be clearly and completely described in conjunction with the accompanying drawings. Obviously, the described embodiments are part of the embodiments of the present invention, rather than all of the embodiments. All other embodiments obtained by those of ordinary skill in the art based on the embodiments of the present invention without creative efforts shall fall within the protection scope of the present invention.

[0023] In the description of the present invention, it should be noted that the orientation or positional relationship indicated by the terms "center", "upper", "lower", "left", "right", "vertical", "horizontal", "inner", "outer", etc. is based on the orientation or positional relationship shown in the accompanying drawings. It is only for the convenience of describing the present invention and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore should not be construed as a limitation to the present invention. In addition, the terms "first", "second", "third" are only used for descriptive purposes and cannot be construed as indicating or implying relative importance.

[0024] In the description of the present invention, it should be noted that unless otherwise clearly specified and defined, the terms "installed", "connected", "connected" should be understood in a broad sense. For example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be directly connected, or indirectly connected through an intermediate medium, and it can be the communication inside two elements. For those of ordinary skill in the art, the specific meanings of the above terms in the present invention can be understood according to specific situations.

[0025] In addition, the technical features involved in different embodiments of the present invention described below can be combined with each other as long as they do not conflict with each other.

[0026] Please refer to Figure 2 Figure 2 , an optical spectroscopic device, comprising: a first spectroscope 1, a first spectroscope chamber 2, a first adjusting device 3, a second spectroscope 4, a second spectroscope chamber 5, a second adjusting device 6, a mirror 7, a mirror chamber 8, a third adjusting device 9, and a triangular prism frame 10;

[0027] On three rectangular faces of the triangular prism frame 10, light passing grooves corresponding to the first spectroscope chamber 2, the second spectroscope chamber 5, and the mirror chamber 8 are respectively provided. The first spectroscope chamber 2, the second spectroscope chamber 5, and the mirror chamber 8 are respectively connected to three rectangular faces of the triangular prism frame 10, and the first adjusting device 3, the second adjusting device 6, and the third adjusting device 9 are correspondingly arranged between the first spectroscope chamber 2, the second spectroscope chamber 5, the mirror chamber 8 and the triangular prism frame 10. The surface where the mirror chamber 8 is located is parallel to the ground. The first spectroscope 1, the second spectroscope 4, and the mirror 7 are correspondingly connected to the first spectroscope chamber 2, the second spectroscope chamber 5, and the mirror chamber 8. Specifically, the first spectroscope 1, the second spectroscope 4, and the mirror 7 are all provided with glue injection holes, and the first spectroscope 1, the second spectroscope 4, and the mirror 7 are connected to the mirror grooves of the first spectroscope chamber 2, the second spectroscope chamber 5, and the mirror chamber 8 by injecting glue into the glue injection holes.

[0028] The two triangular faces of the triangular prism frame 10 are equilateral triangles with the same specifications. The equilateral triangle has extremely strong stability. Setting it in this shape can greatly improve the stability of the support structure of the device, and thus enhance the stability of the overall structure.

[0029] The first adjusting device 3, the second adjusting device 6, and the third adjusting device 9 are all metal gaskets. Circular bosses are provided on the metal gaskets. Specifically, the circular bosses are also arranged in a three-point distribution. The circular bosses on the metal gaskets are respectively ground, and thus the azimuth angles and pitching angles of the first spectroscope 1, the second spectroscope 4, and the mirror 7 can be correspondingly adjusted to meet the design and alignment requirements.

[0030] Three screw mounting holes distributed in a triangle are provided on the first spectroscope chamber 2, the second spectroscope chamber 5, and the mirror chamber 8. The first spectroscope chamber 2, the second spectroscope chamber 5, and the mirror chamber 8 are fixedly connected to the triangular prism frame 10 by screws.

[0031] The triangular prism frame 10 is processed from invar. Invar has good temperature stability, which can reduce the deformation of structural components caused by temperature changes and reduce the temperature deviation of the optical axis.

[0032] Please refer to Figure 3, the present invention further includes a V-shaped optical path system, which includes the above-mentioned optical splitting device, a monitoring camera 11, a collimating lens 12, a laser input window 13, and a subsequent optical path 14; the subsequent optical path is specifically an optical antenna;

[0033] The monitoring camera 11 is arranged on the left side of the first beam splitter 1, the subsequent optical path 14 is arranged on the right side of the second beam splitter 4, the monitoring camera 11 is arranged at the upper left of the first beam splitter 1, and the collimating lens 12 is arranged at the upper right of the second beam splitter 4.

[0034] The included angle between the optical axis of the monitoring camera 11 and the mirror surface of the first beam splitter 1 is 120°, the included angle between the optical axis of the subsequent optical path 14 and the mirror surface of the second beam splitter 4 is 120°, the included angle between the optical axis of the collimating lens 12 and the mirror surface of the first beam splitter 1 is 60°, and the included angle between the optical axis of the laser input window 13 and the mirror surface of the second beam splitter 4 is 60°.

[0035] When building the V-shaped two-layer optical path, first install the mirror 7, the mirror chamber 8, and the third adjusting device 9 on the triangular prism frame 10 and place them at the bottom. Subsequently, install the first beam splitter 1, the first beam splitter chamber 2, the first adjusting device 3, the second beam splitter 4, the second beam splitter chamber 5, and the second adjusting device 6 on the other two rectangular surfaces of the triangular prism frame 10, that is Figure 2 the left and right inclined planes in the middle. Then place the collimating lens 12 obliquely above the left side of the first beam splitter 1, and the included angle between the optical axis of the collimating lens 12 and the mirror surface of the first beam splitter 1 is 60°. Place the laser input window 13 obliquely above the right side of the second beam splitter 4, and the included angle between the optical axis of the laser input window 13 and the mirror surface of the second beam splitter 4 is 60°. The collimating lens 12 emits light along the 60° direction of the mirror surface of the first beam splitter 1. One of the lights is the first reference light representing the optical axis. The first reference light passes through the first beam splitter 1 and is incident on the mirror 7 and then reflected to the second beam splitter 4, and then passes through the second beam splitter 4 and enters the laser input window 13 along the 60° direction of the mirror surface of the second beam splitter 4. This design can place the collimating lens 12 and the laser input window 13 in the same layer of space;

[0036] In addition, the monitoring camera 11 is placed on the left side of the first beam splitter 1. The angle between the optical axis of the monitoring camera 11 and the first beam splitter 1 is 120°. The subsequent optical path 14 is arranged on the right side of the second beam splitter 4. The angle between the optical axis of the subsequent optical path 14 and the second beam splitter 4 is 120°. The light emitted by the collimating lens 12 exits along the first beam splitter 1 at a 60° direction. The other path of light is the second reference light representing the optical axis. After being reflected by the first beam splitter 1, the second reference light exits to the monitoring camera 11 along the mirror surface of the first beam splitter 1 at a 120° angle. On the other side, the laser input window 13 emits input light along the mirror surface of the second beam splitter 4 at a 60° direction. After being reflected by the second beam splitter 4, the input light enters the subsequent optical path 14 along a direction at a 120° angle with the mirror surface of the second beam splitter 4. In this way, the monitoring camera 11 assembly and the subsequent optical path 14 assembly structures can also be placed in the same layer of space.

[0037] The present invention also includes a beam splitting method, which is implemented based on the V-shaped optical path system described above. The collimating lens 12 emits light. One path of light is reflected by the first beam splitter 1 to the monitoring camera 11; the other path of light passes through the first beam splitter 1 and is incident on the mirror 7, and then passes through the second beam splitter 4 and is incident on the laser input window 13. The laser input window 13 emits input light, and the input light is reflected by the second beam splitter 4 to the subsequent optical path 14.

[0038] The device designed by the present invention can optimize the optical path that originally needs to occupy three layers of space into a V-shaped optical path that occupies two layers of space by arranging the beam splitter and the mirror at specific positions. In terms of space, the two-layer optical path structure is more compact than the three-layer optical path structure, reducing the overall volume of the optical path system; in addition, the structural design of the two-layer optical path will also reduce the material usage of the support structure and the housing, further reducing the weight of the entire optical system, which better meets the design requirements of the airborne optical system for lightness and miniaturization. The overall framework of this device is a triangular prism framework, which has better stability compared with the traditional beam splitter and mirror structures. When the system encounters some external environmental factors, this structure can better ensure the overall operation of the system.

[0039] Obviously, the above embodiments are only examples given for clear illustration and are not limitations on the implementation manners. For those of ordinary skill in the art, other different forms of changes or modifications can be made based on the above description. It is not necessary and impossible to enumerate all the implementation manners here. And the obvious changes or modifications derived therefrom are still within the protection scope of the present invention.

Claims

1. An optical spectrometer, characterized in that: The invention comprises a first beam splitter (1), a first beam splitter chamber (2), a first adjustment device (3), a second beam splitter (4), a second beam splitter chamber (5), a second adjustment device (6), a reflector (7), a reflector chamber (8), a third adjustment device (9) and a triangular prism frame (10); Light-through grooves corresponding to the first beam splitter chamber (2), the second beam splitter chamber (5) and the reflector chamber (8) are respectively arranged on the three rectangular surfaces of the triangular prism frame (10); the first beam splitter chamber (2), the second beam splitter chamber (5) and the reflector chamber (8) are respectively connected to the three rectangular surfaces of the triangular prism frame (10); the first adjustment device (3), the second adjustment device (6) and the third adjustment device (9) are respectively arranged between the first beam splitter chamber (2), the second beam splitter chamber (5) and the reflector chamber (8) and the triangular prism frame (10); one surface of the reflector chamber (8) is parallel to the ground; the first beam splitter (1), the second beam splitter (4) and the reflector (7) are respectively connected to the first beam splitter chamber (2), the second beam splitter chamber (5) and the reflector chamber (8).

2. The optical spectrometer according to claim 1, characterized in that: The two triangular faces of the triangular prism frame (10) are equilateral triangles of the same size.

3. The optical spectrometer according to claim 2, characterized in that: The first adjusting device (3), the second adjusting device (6) and the third adjusting device (9) are all metal gaskets, and a circular boss is provided on the metal gasket.

4. The optical spectrometer according to claim 3, characterized in that: The first spectroscope chamber (2), the second spectroscope chamber (5) and the reflector chamber (8) are all provided with three screw mounting holes distributed in a triangular shape, and the first spectroscope chamber (2), the second spectroscope chamber (5) and the reflector chamber (8) are fixedly connected to the triangular prism frame (10) by means of screws.

5. A V-shaped optical path system, characterized in that: It comprises the optical spectrometer as claimed in claim 4, a monitoring camera (11), a collimating lens (12), a laser input window (13) and a subsequent optical path (14); The monitoring camera (11) is arranged on the left side of the first beam splitter (1), the subsequent optical path (14) is arranged on the right side of the second beam splitter (4), the monitoring camera (11) is arranged on the upper left side of the first beam splitter (1), and the collimating lens (12) is arranged on the upper right side of the second beam splitter (4).

6. The V-shaped optical path system according to claim 5, characterized in that: The optical axis of the monitoring camera (11) has a mirror angle of 120° with the first beam splitter (1), the optical axis of the subsequent optical path (14) has a mirror angle of 120° with the second beam splitter (4), the optical axis of the collimating lens (12) has a mirror angle of 60° with the first beam splitter (1), and the optical axis of the laser input window (13) has a mirror angle of 60° with the second beam splitter (4).

7. A spectroscopic method, characterized in that: The method is implemented based on the V-shaped optical path system described in claim 6, wherein the collimating lens (12) emits light, one path of light is reflected by a first beam splitter (1) to a monitoring camera (11); another path of light is incident on a reflector (7) through the first beam splitter (1), and is incident on a laser input window (13) through a second beam splitter (4), and the laser input window (13) emits input light, and the input light is reflected by the second beam splitter (4) to a subsequent optical path (14).

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