CN220894656U - Dual-exit pupil eyepiece optical system - Google Patents
Dual-exit pupil eyepiece optical system Download PDFInfo
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- CN220894656U CN220894656U CN202322361361.6U CN202322361361U CN220894656U CN 220894656 U CN220894656 U CN 220894656U CN 202322361361 U CN202322361361 U CN 202322361361U CN 220894656 U CN220894656 U CN 220894656U
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- eyepiece
- exit pupil
- optical system
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- 210000001747 pupil Anatomy 0.000 title claims abstract description 62
- 230000003287 optical effect Effects 0.000 title claims abstract description 37
- 239000011521 glass Substances 0.000 claims abstract description 19
- 239000004033 plastic Substances 0.000 claims abstract description 18
- 229920003023 plastic Polymers 0.000 claims abstract description 18
- 239000000463 material Substances 0.000 claims abstract description 7
- 230000007613 environmental effect Effects 0.000 claims abstract description 6
- 230000009977 dual effect Effects 0.000 claims description 15
- 239000005308 flint glass Substances 0.000 claims description 6
- 102220637360 Glutathione S-transferase A3_F52R_mutation Human genes 0.000 claims description 3
- 102220616555 S-phase kinase-associated protein 2_E48R_mutation Human genes 0.000 claims description 3
- 229910052746 lanthanum Inorganic materials 0.000 claims description 3
- FZLIPJUXYLNCLC-UHFFFAOYSA-N lanthanum atom Chemical compound [La] FZLIPJUXYLNCLC-UHFFFAOYSA-N 0.000 claims description 3
- 229920003229 poly(methyl methacrylate) Polymers 0.000 claims description 3
- 239000004926 polymethyl methacrylate Substances 0.000 claims description 3
- 102200029613 rs35593767 Human genes 0.000 claims description 2
- 230000037431 insertion Effects 0.000 claims 1
- 238000003780 insertion Methods 0.000 claims 1
- 238000000465 moulding Methods 0.000 abstract description 4
- 238000003384 imaging method Methods 0.000 abstract description 3
- 230000009286 beneficial effect Effects 0.000 description 2
- 238000010586 diagram Methods 0.000 description 2
- 230000000694 effects Effects 0.000 description 2
- 210000003128 head Anatomy 0.000 description 1
- 238000012423 maintenance Methods 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 238000006467 substitution reaction Methods 0.000 description 1
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Abstract
The utility model discloses a dual-exit pupil eyepiece optical system, which comprises a first lens, a second lens, a third lens and a micro display screen, wherein the first lens, the second lens, the third lens and the micro display screen are sequentially arranged along an optical axis from eyes to the micro display screen; the first lens is a cemented positive lens, the second lens is a plastic aspheric negative lens, and the third lens is a glass positive lens; firstly, the lens is made of glass material, so that the environmental adaptability of the ocular is improved; secondly, the lens adopts an aspheric plastic lens, so that the imaging quality of the ocular is improved, the weight of the whole ocular is reduced, and the batch molding cost is far lower than that of glass lenses; thirdly, the eyepiece of the utility model has two exit pupil distances, wherein the first exit pupil distance is larger than 20mm and the exit pupil diameter is larger than 12mm, and the eyepiece can be currently aimed for use in the case; the second exit pupil distance is larger than 40mm, the exit pupil diameter exit pupil distance is larger than 6mm, and the high eye point requirement of the gun sighting eyepiece can be met; fourth, the whole system only adopts 4 lenses, the structural style is simple, and the structural lens barrel is easy to be made.
Description
Technical Field
The utility model relates to the technical field of optical systems, in particular to a double-exit pupil eyepiece optical system.
Background
With the continuous development of individual equipment, the head glasses, sighting telescope and the like are also expanded towards informatization, intelligence, light weight, multipurpose and the like. Particularly, under special environment conditions such as battlefield, the soldier can use as an observation mirror, can use as a gun aiming, and can use as a current aiming with the single soldier aiming tool.
Whereas a typical gun sight eyepiece requires a long exit pupil distance, a front sight eyepiece typically requires a large exit pupil diameter. The prior art ocular is generally not commonly used, and therefore, we propose a dual exit pupil ocular optical system to solve the above-mentioned problems.
Disclosure of utility model
The present utility model is directed to a dual exit pupil eyepiece optical system for solving the above-mentioned problems.
In order to achieve the above purpose, the present utility model provides the following technical solutions:
The double-exit pupil eyepiece optical system comprises a first lens, a second lens, a third lens and a micro display screen which are sequentially arranged along an optical axis from eyes to the micro display screen; the first lens is a cemented positive lens, the second lens is a plastic aspheric negative lens, and the third lens is a glass positive lens
As a further scheme of the utility model: the ratio of the focal length of the first lens to the focal length of the whole lens satisfies the following relationship:
0.3＜|f1/f|<1
Wherein f is the focal length of the whole lens, and f1 is the focal length of the first lens group.
As a further scheme of the utility model: the first lens adopts a glass lens, so that the environmental adaptability of the ocular lens is improved.
As a further scheme of the utility model: the other side of the first lens is provided with an entrance pupil II, and the other side of the entrance pupil II is provided with an entrance pupil I.
As a further scheme of the utility model: the central thickness of the cemented positive lens is 1.6mm and 10.3mm respectively; the material of the cemented positive lens is heavy flint glass and heavy lanthanum flint glass respectively.
As a further scheme of the utility model: the thickness of the center of the plastic aspheric negative lens is 4mm; the plastic aspheric negative lens is made of PMMA, E48R, K26R, F52R, APL5014DP, PAL5514ML and ep5000; the aspherical coefficients of the plastic aspherical negative lens are a= -1.2292151E-5, b= 2.7596927-10, c= -3.2466247E-11, d= 7.7502617E-14.
As a further scheme of the utility model: the diameters of the first entrance pupil and the second entrance pupil are between 7.5mm and 9.5 mm.
As a further scheme of the utility model: the optical system sets up the inside at the eye-lens cone, the outside of eye-lens cone is provided with the eye-lens frame, the outside of eye-lens frame is provided with the mirror base, be provided with the jack on the one end outer wall of eye-lens frame, be provided with logical groove on the mirror base, the inside of logical groove is provided with the inserted bar, the one end setting of inserted bar is in the inside of jack, the other end of inserted bar passes logical groove and is connected with the inserted block, the inserted bar cooperatees with the jack and uses.
As a further scheme of the utility model: two groups of clamping rods are arranged on the outer wall of the inserted link, a plurality of groups of clamping grooves are arranged on the outer wall of the mirror base, a plurality of groups of clamping grooves are formed in the outer wall of the mirror base at equal intervals, and the clamping rods are matched with the clamping grooves for use.
As still further aspects of the utility model: the other end of the eye lens frame is provided with a fixing bolt, the outer wall of the eye lens barrel is provided with positioning holes, a plurality of groups of positioning holes are formed in the outer wall of the eye lens barrel at equal intervals, a plurality of groups of internal threads are formed in the inner wall of each positioning hole, and the internal threads are matched with threads on the fixing bolt.
Compared with the prior art, the utility model has the beneficial effects that:
First, the lens adopts glass material, has improved the environmental suitability of eyepiece.
Secondly, the lens adopts an aspherical plastic lens, so that the imaging quality of the ocular is improved, the weight of the whole ocular is reduced, and the batch molding cost is far lower than that of glass lenses.
Thirdly, the eyepiece of the utility model has two exit pupil distances, wherein the first exit pupil distance is larger than 20mm and the exit pupil diameter is larger than 12mm, and the eyepiece can be currently aimed for use in the case; the second exit pupil distance is larger than 40mm, the exit pupil diameter exit pupil distance is larger than 6mm, and the high eye point requirement of the gun sighting eyepiece can be met.
Fourth, the whole system only adopts 4 lenses, the structural style is simple, and the structural lens barrel is easy to be made.
This two exit pupil eyepiece optical system, through setting up the jack, lead to the groove, the inserted bar, the inserted block, the clamping lever, the draw-in groove, fixing bolt and locating hole, when needs are adjusted the distance of eye tube, break away from the inside of jack with the inserted bar, then remove the eye tube in the inside of microscope base, make the eyepiece frame remove suitable position, then insert the inside of jack with the inserted bar, make two sets of clamping lever joint in the inside of corresponding draw-in groove simultaneously, make the stable joint of eyepiece frame in the inside of microscope base, simultaneously also can be through rotating fixing bolt, make fixing bolt break away from the inside of corresponding locating hole, then make the eye tube adjust suitable position in the inside of eyepiece frame, then with fixing bolt joint in the inside of corresponding locating hole, the position of being convenient for and stability better locking effect of eye tube in the eyepiece frame is realized, the inside position of eyepiece frame is convenient for adjusting, the eyepiece frame is convenient for also dismantle the microscope base simultaneously, eyepiece frame, the eye tube is convenient for, the eye tube is changed in the inside of microscope base, the eye tube is easy, realize adjusting the degree of vision is adjusted, the whole structure is detached and the adjustment is comparatively convenient, the adjustment is all convenient.
Drawings
Fig. 1 is a schematic diagram of an eyepiece optical system according to the present utility model.
Fig. 2 is a graph of MTF for an eyepiece exit pupil distance of 20mm in a dual exit pupil eyepiece optical system of the utility model.
Fig. 3 is a graph of MTF for an eyepiece exit pupil distance of 40mm in a dual exit pupil eyepiece optical system of the utility model.
Fig. 4 is a graph of distortion of a dual exit pupil eyepiece optical system of the utility model.
Fig. 5 is a schematic structural diagram of a lens holder according to the present utility model.
Fig. 6 is an enlarged schematic view of the structure of fig. 5 a.
Fig. 7 is an enlarged schematic view of the structure of fig. 5B.
Fig. 8 is a schematic structural view of a jack according to the present utility model.
Wherein: 1. an entrance pupil I; 2. an entrance pupil II; 3. a first lens; 4. a second lens; 5. a third lens; 6. a micro display screen; 7. a lens base; 8. a spectacle frame; 9. a eyepiece barrel; 10. a jack; 11. a through groove; 12. a rod; 13. inserting blocks; 14. a clamping rod; 15. a clamping groove; 16. a fixing bolt; 17. and positioning holes.
Detailed Description
In order that the above-recited objects, features and advantages of the present utility model will be more clearly understood, a more particular description of the utility model will be rendered by reference to the appended drawings and appended detailed description.
In the following description, numerous specific details are set forth in order to provide a thorough understanding of the present utility model, but the present utility model may be practiced in other ways than those described herein, and therefore the scope of the present utility model is not limited to the specific embodiments disclosed below.
In one embodiment, as shown in FIGS. 1-4, a dual exit pupil eyepiece optical system with a focal length of 27mm, a magnification of 9.25X, an optical total length of 29mm, and a weight of only 12g; the optical axis comprises a diaphragm, a first lens 3, a second lens 4, a third lens 5 and a micro display screen 6 which are sequentially arranged along the optical axis from eyes to the micro display screen 6; the first lens 3 is a convex-concave cemented positive lens, the second lens 4 is a biconcave plastic aspheric negative lens, and the third lens 5 is a biconvex glass positive lens;
The ratio of the focal length of the first lens 3 to the focal length of the entire lens satisfies the following relationship:
0.3＜|f1/f|<1
Wherein f is the focal length of the whole lens, and f1 is the focal length of the first lens group of 20.7mm;
The first lens 3 adopts a glass lens, so that the environmental adaptability of the ocular lens is improved;
The other side of the first lens 3 is provided with an entrance pupil II, and the other side of the entrance pupil II is provided with an entrance pupil I;
The center thickness of the cemented positive lens was 1.6mm and 10.3mm, respectively; the material of the cemented positive lens is heavy flint glass and heavy lanthanum flint glass respectively;
the thickness of the center of the plastic aspheric negative lens is 4mm; the plastic aspheric negative lens is made of PMMA, E48R, K R, F52R, APL5014DP, PAL5514ML, ep5000 and the like, has excellent optical performance and density which is generally not more than 1.25g/cm3 and is obviously smaller than that of glass, thus the weight of an eyepiece optical system is obviously reduced by 0-0 percent, and the batch molding cost is far lower than that of glass lenses;
The aspherical coefficients of the plastic aspherical negative lens are a= -1.2292151E-5, b= 2.7596927-10, c= -3.2466247E-11, d= 7.7502617E-14;
The diameter of the first entrance pupil and the second entrance pupil is between 7.5mm and 9.5 mm.
As shown in fig. 2-3, wherein the abscissa represents the spatial frequency of the line pair/mm and the ordinate represents the MTF value. As can be seen from fig. 2, the present embodiment exhibits a better contrast in the spatial frequency of 30lp/mm in the central region, meeting the requirements of human eye observation.
As shown in fig. 4, the maximum distortion thereof is only 2.2%.
The utility model provides a double-exit pupil eyepiece optical system, which comprises 7 lenses, wherein the curvature radius, the lens center thickness, the lens center distance and the lens refractive index of the 4 lenses meet the following conditions:
| Face number | Surface type | R (radius of curvature) | D (center distance) | Nd (refractive index) |
| 1 | Diaphragm | Infinite number of cases | 40(20) | |
| 2 | Spherical surface | 14.37 | 6.1 | 1.88 |
| 3 | Spherical surface | -38.04 | 1.1 | 1.96 |
| 4 | Spherical surface | 59.05 | 6.44 | |
| 5 | Aspherical surface | -23.11 | 2.2 | 1.54 |
| 6 | Aspherical surface | 9.84 | 1.23 | |
| 7 | Spherical surface | 12.39 | 3.3 | 1.65 |
| 8 | Spherical surface | -137.17 | 8.7 | |
| 9 | Spherical surface | Infinite number of cases |
The surfaces with the surface numbers of 5 and 6 in the surface are aspheric surfaces, and the aspheric lens meets the following formula:
Wherein: c=1/R, R is the aspherical apex radius, and k is a quadric parameter. The aspherical profile parameters in this example are shown in the following table:
both surfaces of the plastic lens can be aspheric, and can be properly adjusted according to parameters of the system, materials of the plastic lens and processing difficulty.
In summary, the dual exit pupil eyepiece optical system provided by the utility model has the following beneficial effects:
First, the first lens adopts glass material, has improved the environmental suitability of eyepiece.
Second, the second lens adopts plastic lens, which not only improves the imaging quality of the ocular, but also reduces the weight of the whole ocular, and the batch molding cost is far lower than that of glass lens
Thirdly, the eyepiece of the utility model has two exit pupil distances, wherein the first exit pupil distance is larger than 20mm and the exit pupil diameter is larger than 12mm, and the eyepiece can be currently aimed for use in the case; the second exit pupil distance is larger than 40mm, the exit pupil diameter exit pupil distance is larger than 6mm, and the high eye point requirement of the gun sighting eyepiece can be met.
Fourth, the whole system only adopts 4 lenses, the structural style is simple, and the structural lens barrel is easy to be made.
As shown in fig. 5-8, the optical system is arranged in the eye lens barrel 9, the eye lens barrel 9 is provided with an eye lens frame 8 on the outer side, the eye lens frame 8 is provided with a lens seat 7 on the outer wall of one end of the eye lens frame 8, the lens seat 7 is provided with a through groove 11, the through groove 11 is internally provided with an inserting rod 12, one end of the inserting rod 12 is arranged in the jack 10, the other end of the inserting rod 12 passes through the through groove 11 and is connected with an inserting block 13, and the inserting rod 12 is matched with the jack 10 for use; two groups of clamping rods 14 are arranged on the outer wall of the inserted rod 12, a plurality of groups of clamping grooves 15 are arranged on the outer wall of the mirror base 7, the plurality of groups of clamping grooves 15 are equidistantly arranged on the outer wall of the mirror base 7, and the clamping rods 14 are matched with the clamping grooves 15 for use; when the eye lens barrel 9 is used, when the distance of the eye lens barrel 9 needs to be adjusted, the inserting rod 12 is separated from the inside of the jack 10, then the eye lens frame 8 is moved in the inside of the lens seat 7, so that the eye lens frame 8 is moved to a proper position, then the inserting rod 12 is inserted into the inside of the jack 10, and meanwhile, the two groups of clamping rods 14 are clamped in the corresponding clamping grooves 15, so that the eye lens frame 8 is stably clamped in the inside of the lens seat 7;
As shown in fig. 7-8, the other end of the glasses frame 8 is provided with a fixing bolt 16, the outer wall of the glasses barrel 9 is provided with a positioning hole 17, a plurality of groups of positioning holes 17 are equidistantly arranged on the outer wall of the glasses barrel 9, the inner walls of the plurality of groups of positioning holes 17 are provided with a group of internal threads, and the internal threads are matched with the threads on the fixing bolt 16 for use; simultaneously also can be through rotating fixing bolt 16 for fixing bolt 16 breaks away from the inside of corresponding locating hole 17, then makes eye lens cone 9 adjust to suitable position in the inside of eyepiece frame 8, then with fixing bolt 16 joint in the inside of corresponding locating hole 17, realized comparatively convenient and better locking effect of stability, be convenient for dismantle lens holder 7, eyepiece frame 8, eye lens cone 9 simultaneously, conveniently change maintenance to lens holder 7, eyepiece frame 8, eye lens cone 9, realize adjusting the visibility, overall structure is simple, the equipment is dismantled and the adjustment operation is all comparatively convenient.
The foregoing is only a preferred embodiment of the present utility model, but the scope of the present utility model is not limited thereto, and any person skilled in the art, who is within the scope of the present utility model, should make equivalent substitutions or modifications according to the technical scheme of the present utility model and the inventive concept thereof, and should be covered by the scope of the present utility model.
Claims (10)
1. The double-exit pupil eyepiece optical system is characterized by comprising a first lens (3), a second lens (4), a third lens (5) and a micro display screen (6) which are sequentially arranged along an optical axis from eyes to the micro display screen (6); the first lens (3) is a cemented positive lens, the second lens (4) is a plastic aspheric negative lens, and the third lens (5) is a glass positive lens.
2. A dual exit pupil eyepiece optical system according to claim 1 characterized in that the ratio of the focal length of the first lens (3) to the focal length of the entire lens satisfies the following relationship:
0.3＜|f1/f|<1
Wherein f is the focal length of the whole lens, and f1 is the focal length of the first lens group.
3. A dual exit pupil eyepiece optical system as claimed in claim 1 characterized in that the first lens (3) is a glass lens improving the environmental flexibility of the eyepiece.
4. A dual exit pupil eyepiece optical system according to claim 1 characterized in that the other side of the first lens (3) is provided with an entrance pupil two (2) and the other side of the entrance pupil two (2) is provided with an entrance pupil one (1).
5. The dual exit pupil eyepiece optical system of claim 1 wherein the cemented positive lens has a center thickness of 1.6mm and 10.3mm, respectively; the material of the cemented positive lens is heavy flint glass and heavy lanthanum flint glass respectively.
6. The dual exit pupil eyepiece optical system of claim 1 wherein the plastic aspheric negative lens has a center thickness of 4mm; the plastic aspheric negative lens is made of PMMA, E48R, K26R, F52R, APL5014DP, PAL5514ML and ep5000; the aspherical coefficients of the plastic aspherical negative lens are a= -1.2292151E-5, b= 2.7596927-10, c= -3.2466247E-11, d= 7.7502617E-14.
7. A dual exit pupil eyepiece optical system as claimed in claim 4 wherein the first (1) and second (2) entrance pupils are each between 7.5mm and 9.5mm in diameter.
8. The dual-exit pupil eyepiece optical system according to claim 1, wherein the optical system is arranged in an eyepiece barrel (9), an eyepiece frame (8) is arranged on the outer side of the eyepiece barrel (9), a lens seat (7) is arranged on the outer side of the eyepiece frame (8), a jack (10) is arranged on the outer wall of one end of the eyepiece frame (8), a through groove (11) is arranged on the lens seat (7), an inserting rod (12) is arranged in the through groove (11), one end of the inserting rod (12) is arranged in the jack (10), the other end of the inserting rod (12) penetrates through the through groove (11) and is connected with an inserting block (13), and the inserting rod (12) is matched with the jack (10).
9. The dual exit pupil eyepiece optical system according to claim 8, wherein two groups of clamping rods (14) are arranged on the outer wall of the insertion rod (12), a plurality of groups of clamping grooves (15) are arranged on the outer wall of the lens base (7), a plurality of groups of clamping grooves (15) are equidistantly arranged on the outer wall of the lens base (7), and the clamping rods (14) are matched with the clamping grooves (15).
10. The dual exit pupil eyepiece optical system according to claim 9, wherein a fixing bolt (16) is provided at the other end of the eyepiece frame (8), positioning holes (17) are provided on the outer wall of the eyepiece barrel (9), a plurality of groups of positioning holes (17) are equidistantly provided on the outer wall of the eyepiece barrel (9), a plurality of groups of internal threads are provided on the inner wall of the positioning holes (17), and the internal threads are matched with threads on the fixing bolt (16).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202322361361.6U CN220894656U (en) | 2023-08-31 | 2023-08-31 | Dual-exit pupil eyepiece optical system |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202322361361.6U CN220894656U (en) | 2023-08-31 | 2023-08-31 | Dual-exit pupil eyepiece optical system |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN220894656U true CN220894656U (en) | 2024-05-03 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202322361361.6U Active CN220894656U (en) | 2023-08-31 | 2023-08-31 | Dual-exit pupil eyepiece optical system |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN220894656U (en) |
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2023
- 2023-08-31 CN CN202322361361.6U patent/CN220894656U/en active Active
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