CN216668747U

CN216668747U - Double-star simulator

Info

Publication number: CN216668747U
Application number: CN202123359069.8U
Authority: CN
Inventors: 于翠云; 高密芳
Original assignee: Xi'an Jingchi Photoelectric Technology Co ltd
Current assignee: Xi'an Jingchi Photoelectric Technology Co ltd
Priority date: 2021-12-28
Filing date: 2021-12-28
Publication date: 2022-06-03
Anticipated expiration: 2031-12-28

Abstract

The utility model provides a double-star simulator, relates to the technical field of star simulators, and solves the technical problems that the double-star simulator is difficult in aberration correction, more in lenses and complex in system structure in the prior art. The double-star simulator comprises a single-star simulator used for emitting parallel light rays and an oblique prism arranged outside the single-star simulator, wherein the oblique prism is provided with a first inclined surface and a second inclined surface which are oppositely arranged, a light splitting part used for splitting the parallel light rays into transmission light rays and reflection light rays is arranged on the first inclined surface, the reflection light rays are reflected by the second inclined surface and then intersect with the transmission light rays at one point outside the oblique prism, and the first inclined surface and the second inclined surface are preset with an adjusting included angle and an adjusting interval, so that different included angles can be formed between the transmission light rays and the reflection light rays, and the transmission light rays and the reflection light rays can intersect at different positions outside the oblique prism, thereby forming different view fields and different exit pupil distances.

Description

Double-star simulator

Technical Field

The utility model relates to the technical field of star simulators, in particular to a double-star simulator.

Background

The star simulator is ground test equipment of a star sensor, and can be generally divided into a single-star simulator, a double-star simulator, a multi-star simulator, a dynamic simulator and the like according to the number of star points. The double-star simulator is one of main ground test equipment of the star sensor, and tests dynamic angle measurement precision and dynamic sensitivity indexes of the star sensor by utilizing the principle that the angular distance of double stars is unchanged, so that the double-star simulator is used for testing the resolving precision of the star sensor on the included angle of two fixed stars.

When the star sensor is comprehensively tested, the star sensor is generally provided with a light shield, so that the pupil distance of the star simulator is long to ensure that the pupils of the star simulator and the star sensor are matched. In addition, in order to meet the test requirement of the large-field star sensor, the field of view of the star simulator is also required to be a large-field system, so that the requirement that the star simulator has a long exit pupil distance and a large enough field of view range is provided.

In the prior art, a traditional mode is to use an optical system with a complex structure to realize the functions of large field of view and long exit pupil distance, but according to applied optical knowledge, the long exit pupil distance causes large aberration in the meridional and sagittal directions of the optical system, and is difficult to balance, and the large field of view further increases the design and assembly difficulty of the optical system. Although the problem of aberration correction can be solved by using a system further complicated mode, the defects of more optical system lenses, cost increase, difficulty in aberration control and the like can be caused, so that the optical system of the traditional large-field interpupillary distance double-star simulator is difficult to correct aberrations, more lenses, complicated in system structure, large in general size and weight and not beneficial to carrying and transferring.

Or, another conventional method is to use two single-star simulators to be placed at a certain angle, so that two beams of light beams with a certain angle are incident on the entrance pupil of the star sensor.

Therefore, how to solve the technical problems of difficulty in aberration correction, more lenses and complex system structure of the two-star simulator in the prior art becomes an important technical problem to be solved by those in the art.

SUMMERY OF THE UTILITY MODEL

The utility model aims to provide a double-star simulator, which solves the technical problems of difficult aberration correction, more lenses and complex system structure of the double-star simulator in the prior art. The technical effects that can be produced by the preferred technical scheme in the technical schemes provided by the utility model are described in detail in the following.

In order to achieve the purpose, the utility model provides the following technical scheme:

the utility model provides a double-star simulator, which comprises a single-star simulator used for emitting parallel rays and an oblique square prism arranged at a light outlet end of the single-star simulator, wherein the oblique square prism is provided with a first inclined surface and a second inclined surface which are oppositely arranged, a light splitting piece used for splitting the parallel rays into transmission rays and reflection rays is arranged on the first inclined surface, the reflection rays are reflected by the second inclined surface and then intersect with the transmission rays at one point outside the oblique square prism, and an included angle and an interval are preset between the first inclined surface and the second inclined surface.

Further, the light splitting component is a beam splitting film, and the beam splitting film is fixedly covered on the first inclined plane, so that the transmitted light and the reflected light form light beams with the same or different light intensities.

Further, the light splitting part is a color splitting film, and the color splitting film is fixedly covered on the first inclined plane, so that the transmitted light and the reflected light form light rays in different spectral bands.

Further, still include right angle prism, right angle prism's inclined plane with first inclined plane is laminated mutually and is set up, light splitting piece presss from both sides establishes fixed setting right angle prism's inclined plane with between the first inclined plane.

Further, the reflection film is covered and fixed on the second inclined plane.

Further, the protective film is further included and is fixedly covered on the second inclined plane.

Furthermore, the angle range of the adjusting included angle between the first inclined surface and the second inclined surface is 0-40 degrees.

Further, the length range of the adjusting distance between the first inclined plane and the second inclined plane is 5 mm-1 m.

Further, the range of the light splitting ratio of the beam splitting film is 3% -97%.

Further, the color separation wave band of the color separation film is 400nm-1000 nm.

Compared with the prior art, the utility model has the following beneficial effects:

the double-star simulator provided by the utility model utilizes a simulation principle different from the prior art, and can form different included angles between transmission light rays and reflection light rays and enable the transmission light rays and the reflection light rays to intersect at different positions outside an oblique prism by changing the included angle between the first inclined plane and the second inclined plane and changing the distance between the first inclined plane and the second inclined plane, thereby forming different fields of view and different interpupillary distances in an extremely simple mode, namely, a large field of view can be formed by adjusting the included angle between the first inclined plane and the second inclined plane, a longer interpupillary distance can be formed by adjusting the distance between the first inclined plane and the second inclined plane, after the oblique prism is processed, the preset angles of the first inclined plane and the second inclined plane are very stable and are not easy to change, when the field of view and the interpupillary distance of the double-star simulator are required to be adjusted, only the oblique prism with the corresponding adjusted included angle and adjusted distance is required to be replaced, the utility model can ensure the included angle of the transmission light and the reflection light and the stability of the positions of two star points formed on the star sensor for a long time, and has the advantages of simple accessory structure, more convenient use and adjustment, reduced volume and greatly reduced cost.

Drawings

In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings used in the description of the embodiments or the prior art will be briefly described below, it is obvious that the drawings in the following description are only some embodiments of the present invention, and for those skilled in the art, other drawings can be obtained according to the drawings without creative efforts.

Fig. 1 is a schematic structural and schematic diagram of a dual-star simulator configured to adjust an included angle and an interval according to an embodiment of the present invention;

FIG. 2 is a schematic diagram of a dual-star simulator configured to adjust an included angle and adjust a spacing according to another embodiment of the present invention;

FIG. 3 is a schematic diagram of the position of a light splitter provided in an embodiment of the present invention;

fig. 4 is a schematic position diagram of a reflection film provided in an embodiment of the present invention.

In the figure 1-single star simulator; 2-an oblique square prism; 3-a first bevel; 4-a second bevel; 5-a light splitting part; 6-transmitted light; 7-reflected light; 8-a right-angled prism; 9-a reflective film; 10-a first plane; 11-second plane.

Detailed Description

In order to make the objects, technical solutions and advantages of the present invention more apparent, the technical solutions of the present invention will be described in detail below. It is to be understood that the described embodiments are merely exemplary of the utility model, and not restrictive of the full scope of the utility model. All other embodiments, which can be derived by a person skilled in the art from the examples given herein without any inventive step, are within the scope of the present invention.

The utility model aims to provide a double-star simulator, which solves the technical problems of difficult aberration correction, more lenses and complex system structure of the double-star simulator in the prior art.

Hereinafter, embodiments will be described with reference to the drawings. The embodiments described below do not limit the scope of the utility model described in the claims. Further, the entire contents of the configurations shown in the following embodiments are not limited to those necessary as a solution of the utility model described in the claims.

The technical solution of the present invention will be described in detail with reference to specific examples.

Example 1:

referring to fig. 1-3, the double-star simulator provided in this embodiment includes a single-star simulator 1 and an oblique square prism 2, the single-star simulator 1 is used for emitting parallel light, the oblique square prism 2 is disposed outside the light emitting end of the single-star simulator 1, the rhombic prism 2 is provided with a first inclined surface 3 and a second inclined surface 4 which are oppositely arranged, the first inclined surface 3 is provided with a light splitting part 5, the light splitting part 5 can divide parallel light rays into transmission light rays 6 and reflection light rays 7, the transmission light rays 6 can be emitted to infinity through the first inclined surface 3, the reflection light rays 7 can be intersected with the transmission light rays 6 at one point outside the rhombic prism 2 after being reflected by the second inclined surface 4, the position of the point is the placing position of the star sensor, the star sensor can simultaneously receive the transmission light rays 6 and the reflection light rays 7, and therefore two star points can be observed on the star sensor. The utility model utilizes the simulation principle different from the prior art, different included angles can be formed between the transmission light rays 6 and the reflection light rays 7 by changing the included angles of the first inclined planes 3 and the second inclined planes 4 and the distance between the first inclined planes 3 and the second inclined planes 4 and different visual fields and different interpupillary distances can be formed in an extremely simple mode by changing the included angles of the first inclined planes 3 and the second inclined planes 4 and by enabling the transmission light rays 6 and the reflection light rays 7 to intersect at different positions outside the rhombic prism 2, namely, a large visual field can be formed by adjusting the included angles of the first inclined planes 3 and the second inclined planes 4, a longer interpupillary distance can be formed by adjusting the distance between the first inclined planes 3 and the second inclined planes 4, and after the rhombic prism 2 is processed, the preset angles of the first inclined plane 3 and the second inclined plane 4 are very stable and are not easy to change, when the field of view and the exit pupil distance of the optical lens system are required to be adjusted, only the rhombic prism 2 with the corresponding adjusting included angle alpha and the adjusting interval L is required to be replaced, the stability of the included angle between the transmission light ray 6 and the reflection light ray 7 and the positions of two star points formed on the star sensor can be ensured for a long time, the optical lens system is simple in accessory structure and more convenient to use and adjust, the size is reduced, the cost is greatly reduced, and the technical problems that the double-star simulator is difficult to correct the aberration, more lenses and complex in system structure in the prior art are solved.

It should be noted here that the rhombic prism 2 further has a first plane 10 and a second plane 11, the first plane 10 and the second plane 11 are located at both sides of the first inclined plane 3 and the second inclined plane 4, and the first plane 10 and the second plane 11 are arranged in parallel and are both arranged perpendicular to the parallel light rays. The exit pupil distance is the distance between the intersection of the transmitted ray 6 and the reflected ray 7 to the first plane 10 of the rhombic prism 2. The focal distance range of the single-star simulator 1 is preferably 20 mm-600 mm, and the single-star simulator 1 can be, but is not limited to, a transmission system, a reflection system or a catadioptric system.

Example 2:

referring to fig. 1 to 3, the present embodiment further defines the light-splitting member 5 on the basis of embodiment 1. The beam splitter 5 is a beam splitting film which is fixedly covered on the first inclined plane 3, so that the transmission light 6 and the reflection light 7 form light beams with the same or different light intensities, star points with the same or different light intensities are formed on the star sensor, and the simulation types of the star points can be diversified.

Further, the light splitting ratio of the beam splitting film can be in a range of 3% to 97%, the range is a preferable and common light splitting ratio, the light splitting ratios of the beam splitting films are the same, the brightness of the two star points is the same, the light splitting ratios of the beam splitting films are different, and the brightness of the two star points is different.

Example 3:

referring to fig. 1 to 3, in the present embodiment, the structure of the light splitter 5 is further limited in addition to embodiment 1, and the present embodiment is a technical solution in parallel with embodiment 2. The light splitting part 5 is a color splitting film which is fixedly covered on the first inclined plane 3, so that the transmission light 6 and the reflection light 7 form light rays with different spectral bands, the transmission light 6 and the reflection light 7 can form light rays with different colors, star points with different colors are formed on the star sensor, and the simulation types of the star points are diversified.

Furthermore, the range of the color separation wave band of the color separation film is 400nm-1000nm, the range is the preferable spectrum wave band where the transmitted light 6 and the reflected light 7 are located, and the simulation effect on the star point is good.

Example 4:

referring to fig. 1-3, the present embodiment further defines the structure of the double-star simulator based on embodiment 1. Wherein, two star simulators still include right angle prism 8, and the inclined plane of right angle prism 8 and first inclined plane 3 laminating mutually set up, and beam splitter 5 presss from both sides to establish fixed setting between the inclined plane of right angle prism 8 and first inclined plane 3, so set up, and right angle prism 8 can protect and consolidate beam splitter 5, avoids beam splitter 5 to receive foreign object to damage.

The first right-angle surface of the right-angle prism 8 is arranged in parallel with the first plane 10 of the rhombic prism 2, and the second right-angle surface of the right-angle prism 8 is arranged in parallel with the parallel light rays. The material of the rectangular prism 8 and the rhombic prism 2 may be, but is not limited to, optical glass, optical resin, optical plastic, etc., and preferably, the material of the rectangular prism 8 and the rhombic prism 2 is optical glass. The connections between the right-angle prism 8 and the rhombic prism 2, between the right-angle prism 8 and the light splitting member 5, and between the rhombic prism 2 and the light splitting member 5 may be, but are not limited to, adhesive connections.

Referring to fig. 1-2 and fig. 4, as an alternative implementation manner of the embodiment of the present invention, the dual-star simulator further includes a reflective film 9, and the reflective film 9 is covered and fixed on the second inclined surface 4, and can play a role in enhancing reflection, so as to ensure that all the reflected light rays 7 can be reflected again on the second inclined surface 4 to intersect with the transmitted light rays 6.

It should be noted that, when the reflective film 9 is not provided, according to the total reflection phenomenon, if the incident angle of the reflected light 7 on the second inclined plane 4 is greater than the critical angle, the reflected light 7 is also totally reflected by the second inclined plane 4 so as to intersect with the transmitted light 6, where the reflective film 9 is provided to play a role of enhancing reflection, and when the incident angle of the reflected light 7 on the second inclined plane 4 is not greater than the critical angle, the reflected light 7 can also be totally reflected by the reflective film 9 so as to intersect with the transmitted light 6.

As an optional implementation manner of the embodiment of the utility model, the double-star simulator further comprises a protective film, and the protective film is covered and fixed on the second inclined surface 4, so that the second inclined surface 4 of the rhombic prism 2 can be protected, and the reflecting effect is prevented from being influenced by damage of foreign objects.

Referring to fig. 1-2, as an alternative implementation of the embodiment of the present invention, the angle range of the adjusted included angle α between the first inclined surface 3 and the second inclined surface 4 is 0 ° to 40 °, which is a preferred included angle range, which can obtain a large field angle of 0 ° to 80 °, and the star point observation is more convenient.

As an optional implementation manner of the embodiment of the present invention, the length range of the adjustment distance L between the first inclined surface 3 and the second inclined surface 4 is 5 mm to 1 m, which is a preferred distance range, and an extremely long exit pupil distance can be obtained to meet the application requirements of the star sensor.

In the description of the present invention, it is to be noted that, unless otherwise specified, "a plurality" means two or more; the terms "upper", "lower", "left", "right", "inner", "outer", "front", "rear", "head", "tail", and the like, indicate orientations or positional relationships based on the orientations or positional relationships shown in the drawings, are only for convenience in describing and simplifying the description, and do not indicate or imply that the device or element referred to must have a particular orientation, be constructed in a particular orientation, and be operated, and thus, should not be construed as limiting the utility model. Furthermore, the terms "first," "second," "third," and the like are used for descriptive purposes only and are not to be construed as indicating or implying relative importance.

In the description of the present invention, it should also be noted that, unless otherwise explicitly specified or limited, the terms "mounted," "connected," and "connected" are to be construed broadly, e.g., as meaning either a fixed connection, a removable connection, or an integral connection; can be mechanically or electrically connected; may be directly connected or indirectly connected through an intermediate. The specific meaning of the above terms in the present invention can be understood as appropriate to those of ordinary skill in the art.

The above description is only for the specific embodiments of the present invention, but the scope of the present invention is not limited thereto, and any person skilled in the art can easily conceive of the changes or substitutions within the technical scope of the present invention, and all the changes or substitutions should be covered within the scope of the present invention. Therefore, the protection scope of the present invention shall be subject to the protection scope of the appended claims.

Claims

1. The double-star simulator is characterized by comprising a single-star simulator (1) for emitting parallel rays and an oblique prism (2) arranged at a light emitting end of the single-star simulator (1), wherein the oblique prism (2) is provided with a first inclined surface (3) and a second inclined surface (4) which are oppositely arranged, a light splitting piece (5) for splitting the parallel rays into transmission rays (6) and reflection rays (7) is arranged on the first inclined surface (3), the reflection rays (7) are reflected by the second inclined surface (4) and then intersect with the transmission rays (6) at one point outside the oblique prism (2), and an adjusting included angle and an adjusting distance are preset on the first inclined surface (3) and the second inclined surface (4).

2. A double star simulator according to claim 1, wherein the light splitting member (5) is a beam splitting film which is fixedly covered on the first inclined surface (3) so that the transmitted light rays (6) and the reflected light rays (7) form light beams of the same or different light intensities.

3. A double star simulator according to claim 1, wherein the light-splitting member (5) is a dichroic film fixedly covering the first inclined surface (3) so that the transmitted light (6) and the reflected light (7) form light rays in different spectral bands.

4. The double-star simulator according to claim 1, further comprising a right-angle prism (8), wherein an inclined surface of the right-angle prism (8) is attached to the first inclined surface (3), and the light splitting member (5) is fixedly sandwiched between the inclined surface of the right-angle prism (8) and the first inclined surface (3).

5. Double-star simulator according to claim 1, further comprising a reflective film (9), said reflective film (9) being fixed in covering relation to said second inclined surface (4).

6. Double-star simulator according to claim 1, further comprising a protective film, said protective film being fixed on said second inclined plane (4).

7. Double star simulator according to claim 1, wherein the angle of the adjustment angle of the first inclined plane (3) and the second inclined plane (4) is in the range of 0 ° -40 °.

8. Double-star simulator according to claim 1, wherein the length of the adjustment distance of the first inclined plane (3) and the second inclined plane (4) is in the range of 5 mm-1 m.

9. A double-star simulator according to claim 2, wherein the splitting ratio of the beam splitting film is in the range of 3% to 97%.

10. A double star simulator according to claim 3, wherein the dichroic wavelength band of the dichroic film is in the range of 400nm-1000 nm.