CN219997333U - Large-view-field glued reflecting mirror - Google Patents
Large-view-field glued reflecting mirror Download PDFInfo
- Publication number
- CN219997333U CN219997333U CN202321179877.2U CN202321179877U CN219997333U CN 219997333 U CN219997333 U CN 219997333U CN 202321179877 U CN202321179877 U CN 202321179877U CN 219997333 U CN219997333 U CN 219997333U
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- lens
- object plane
- far
- view
- diaphragm
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- 230000003287 optical effect Effects 0.000 claims abstract description 22
- 238000000034 method Methods 0.000 claims abstract description 4
- 239000004568 cement Substances 0.000 claims abstract description 3
- 210000001747 pupil Anatomy 0.000 claims description 7
- 239000002519 antifouling agent Substances 0.000 claims description 3
- 239000000463 material Substances 0.000 claims description 2
- 239000003292 glue Substances 0.000 claims 3
- 239000005304 optical glass Substances 0.000 description 3
- 239000000853 adhesive Substances 0.000 description 2
- 230000001070 adhesive effect Effects 0.000 description 2
- 229920003023 plastic Polymers 0.000 description 2
- 239000004033 plastic Substances 0.000 description 2
- 230000000007 visual effect Effects 0.000 description 2
- BQCADISMDOOEFD-UHFFFAOYSA-N Silver Chemical compound [Ag] BQCADISMDOOEFD-UHFFFAOYSA-N 0.000 description 1
- 208000027418 Wounds and injury Diseases 0.000 description 1
- XAGFODPZIPBFFR-UHFFFAOYSA-N aluminium Chemical compound [Al] XAGFODPZIPBFFR-UHFFFAOYSA-N 0.000 description 1
- 229910052782 aluminium Inorganic materials 0.000 description 1
- 238000013459 approach Methods 0.000 description 1
- 230000005540 biological transmission Effects 0.000 description 1
- 239000013078 crystal Substances 0.000 description 1
- 230000006378 damage Effects 0.000 description 1
- 230000007547 defect Effects 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 230000002349 favourable effect Effects 0.000 description 1
- PCHJSUWPFVWCPO-UHFFFAOYSA-N gold Chemical compound [Au] PCHJSUWPFVWCPO-UHFFFAOYSA-N 0.000 description 1
- 229910052737 gold Inorganic materials 0.000 description 1
- 239000010931 gold Substances 0.000 description 1
- 238000003384 imaging method Methods 0.000 description 1
- 208000014674 injury Diseases 0.000 description 1
- 238000004519 manufacturing process Methods 0.000 description 1
- 229910052709 silver Inorganic materials 0.000 description 1
- 239000004332 silver Substances 0.000 description 1
- 230000009897 systematic effect Effects 0.000 description 1
Abstract
The utility model discloses a large-view-field glued reflecting mirror, which comprises a first lens and a second lens which are arranged from the near to the far along an optical axis, wherein the surface of one side of the lens, which is adjacent to an object plane, is a near object plane, and the surface of one side of the lens, which is far away from the object plane, is a far object plane; the method is characterized in that: the far object plane of the first lens and the near object plane of the second lens are both planes, a diaphragm is arranged between the far object plane of the first lens and the near object plane of the second lens, and the far object plane of the first lens and the near object plane of the second lens are bonded by optical cement to form an integral structure which is formed by the first lens, the diaphragm and the second lens in sequence; the near object surface of the first lens has positive focal power, and the far object surface of the second lens is concave to the object surface and is plated with a reflecting film. The utility model can make the back-reflected light beam form the approximately parallel light beam returned by the original path, and can obtain uniform back-reflected energy no matter whether the target object is opposite to the receiver or not and how far from the receiver.
Description
Technical Field
The utility model relates to an optical device, in particular to an optical reflecting device, and especially relates to a large-view-field reflecting mirror.
Background
In tracking an object and measuring its spatial position under passive lighting conditions, the prior art often employs a scheme of actively directing a beam of light in the general direction of the object and collecting the retro-reflected energy using a receiver in the vicinity of the beam emitting device. However, the target is not always facing the receiver (i.e., the direction of beam emission), which may result in problems such as the target not being able to reflect energy back to the receiver, or the retro-reflection energy being not uniform enough, the receiver not being able to collect uniform energy and effectively track the target.
To solve the above problems, there are two general approaches: a corner reflector composed of three planes perpendicular to each other, such as laser tracker, is composed of 3 perpendicular reflecting mirrors. The scheme has the defects of complex assembly process, heavy weight and the like, and systematic errors can be caused by spherical diameter errors, misalignment errors of the corner points and the sphere centers of the reflectors, non-verticality of the reflectors and the like in the processing process.
The other is an ellipsoidal multi-faceted refractive lens, such as the one used on fighter aircraft. The processing and manufacturing difficulties are high, and the price is high.
Therefore, there is a need for a reflective device that is simple in structure and low in cost, and that is used to combine with a target object to achieve tracking of the target.
Disclosure of Invention
The utility model aims to provide a large-view-field glued reflecting mirror, which can acquire retro-reflection energy and has relatively uniform energy no matter whether a target object is opposite to a receiver or far from the receiver through structural design.
In order to achieve the aim of the utility model, the utility model adopts the following technical scheme: the large-view-field cemented reflector comprises a first lens and a second lens which are arranged from the near to the far along an optical axis, wherein the surface of one side of the lens, which is adjacent to the object plane, is a near object plane, and the surface of one side of the lens, which is far away from the object plane, is a far object plane;
the far object plane of the first lens and the near object plane of the second lens are both planes, a diaphragm is arranged between the far object plane of the first lens and the near object plane of the second lens, and the far object plane of the first lens and the near object plane of the second lens are bonded by optical cement to form an integral structure which is sequentially formed by the first lens, the diaphragm and the second lens;
the near object plane of the first lens has positive focal power, and the far object plane of the second lens is concave to the object plane and is plated with a reflecting film.
In the above technical scheme, the curvature radius of the near object plane of the first lens is R1, and the center thickness is D1; the curvature radius of the far object plane of the second lens is R2, and the center thickness is D2; the refractive index of the materials of the first lens and the second lens is n under the irradiation wavelength, the diameter of the system entrance pupil is k, and all the parameters accord with the following relation:
R1=D1=k×15×(n-1)，
-R2=D2=k×15。
the size of the diaphragm is determined according to the entrance pupil diameter. The relationship between the aperture and the entrance pupil diameter can be deduced from the law of refractive index, which is common knowledge in the art, and the entrance pupil diameter is preset by using design software in the prior art, and the software automatically gives what the corresponding aperture size is.
According to the preferable technical scheme, the reflecting film is an internal reflecting film, and a protective paint layer is coated outside the reflecting film.
In the above technical solution, the first lens and the second lens may be optical glass, or may be optical crystals or optical plastics.
Due to the application of the technical scheme, compared with the prior art, the utility model has the following advantages:
1. according to the utility model, the diaphragm is arranged between the glued first lens and the glued second lens, the curvature of the near object surface of the first lens and the curvature of the far object surface of the second lens are controlled, and the reflecting film is plated on the far object surface of the second lens, so that the retroreflected light beam forms an approximately parallel light beam returned by an original path, and the receiver can receive the retroreflected light beam.
2. The reflector can enable the parallel light beams with the full view field of 90 degrees to return along the original path, so that even retroflection energy can be obtained no matter whether a target object is opposite to the receiver or not and how far away from the receiver.
3. The utility model is especially suitable for large-area reflection, and when the reflectors are uniformly distributed, the reflectors can be spliced into a large-area reflecting plate, and the reflection energy collection efficiency is especially high and the cost is extremely low.
Drawings
FIG. 1 is a schematic view of a mirror structure according to an embodiment of the present utility model;
FIG. 2 is a point diagram of a mirror of an embodiment;
FIG. 3 is a schematic view of a reflected beam from a mirror of an embodiment.
Wherein: 1. a first lens; 2. a second lens; 3. a near object plane of the first lens; 4. a far object plane of the second lens; 5. an optical adhesive; 6. an object plane.
Detailed Description
The utility model is further described below with reference to the accompanying drawings and examples:
examples: referring to fig. 1, an optical mirror, comprising: the first lens 1 and the second lens 2 are sequentially arranged from the near to the far along the optical axis from the object plane 6, the surface of the lens, which is adjacent to one side of the object plane 6, is a near object plane, and the surface of the lens, which is far away from one side of the object plane 6, is a far object plane; the near object plane 3 of the first lens is convex towards the object plane 6, the far object plane of the first lens 1 and the near object plane of the second lens 2 are both planes, and the far object plane 4 of the second lens is concave towards the object plane 6. Wherein the object plane 6 is shown for illustration only, actually at infinity.
The far object surface of the first lens 1 and the near object surface of the second lens 2 have the same surface shape, an optical adhesive 5 is used for bonding the far object surface of the first lens and the near object surface of the second lens to form a bonding lens, and the far object surface 4 of the second lens is plated with an internal reflection film; the reflecting film can be aluminum, silver or gold, and the outer side of the reflecting film is coated with protective paint to avoid injury.
The first lens and the second lens can be optical glass, optical glass or optical plastic.
The optical mirror further comprises a diaphragm, which is sandwiched between the first lens 1 and the second lens 2 (not shown in the figures).
Through setting up the diaphragm between first lens 1 and second lens 2, be equivalent to setting up the diaphragm in the inside of same well optical medium, be favorable to collecting the incident light of big visual field, reduce the projection height of big visual field light on follow-up optical surface for optical structure is more reasonable, and improves imaging quality.
Table 1 shows specific optical physical parameters of each lens in an optical mirror that can be employed in this embodiment, the radius of curvature and the thickness are each in millimeters (mm).
TABLE 1 design value of optical mirror
Wherein, the surface numbers are numbered according to the surface sequence of each lens, wherein "S1" represents the near object plane of the first lens 1, "S2" represents the far object plane of the first lens 1 and the near object plane of the second lens 2, "S3" is the far object plane of the second lens 2, and the surfaces are reflection surfaces.
Fig. 2 is a point chart of the mirror of the present embodiment. As can be seen from fig. 2, the individual field of view retroreflections are nearly perfectly parallel, which allows the receiver to receive a sufficiently energetic retroreflected beam also in the case of long-range transmission.
Fig. 3 is a schematic view of the reflected light beam of the mirror of the present embodiment. It can be seen that the mirror of this embodiment can achieve primary reflection of a large field of view.
The data of the curvature radius, the thickness and the like can be changed according to the application, so as to be matched with parameters of the entrance pupil diameter and the like.
Claims (4)
1. The large-view-field cemented reflector comprises a first lens and a second lens which are arranged from the near to the far along an optical axis, wherein the surface of one side of the lens, which is adjacent to the object plane, is a near object plane, and the surface of one side of the lens, which is far away from the object plane, is a far object plane; the method is characterized in that:
the far object plane of the first lens and the near object plane of the second lens are both planes, a diaphragm is arranged between the far object plane of the first lens and the near object plane of the second lens, and the far object plane of the first lens and the near object plane of the second lens are bonded by optical cement to form an integral structure which is sequentially formed by the first lens, the diaphragm and the second lens;
the near object plane of the first lens has positive focal power, and the far object plane of the second lens is concave to the object plane and is plated with a reflecting film.
2. The large field of view glue mirror according to claim 1, wherein:
the curvature radius of the near object plane of the first lens is R1, and the center thickness is D1; the curvature radius of the far object plane of the second lens is R2, and the center thickness is D2; the refractive index of the materials of the first lens and the second lens is n under the irradiation wavelength, the diameter of the system entrance pupil is k, and all the parameters accord with the following relation:
R1=D1=k×15×(n-1)，
-R2=D2=k×15。
3. the large field of view glue mirror according to claim 1, wherein: the size of the diaphragm is determined according to the entrance pupil diameter.
4. The large field of view glue mirror according to claim 1, wherein: the reflecting film is an internal reflecting film, and a protective paint layer is coated outside the reflecting film.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202321179877.2U CN219997333U (en) | 2023-05-16 | 2023-05-16 | Large-view-field glued reflecting mirror |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202321179877.2U CN219997333U (en) | 2023-05-16 | 2023-05-16 | Large-view-field glued reflecting mirror |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN219997333U true CN219997333U (en) | 2023-11-10 |
Family
ID=88615888
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202321179877.2U Active CN219997333U (en) | 2023-05-16 | 2023-05-16 | Large-view-field glued reflecting mirror |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN219997333U (en) |
-
2023
- 2023-05-16 CN CN202321179877.2U patent/CN219997333U/en active Active
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