Day and night gun sight lens

Abstract

The utility model relates to the technical field of gun aiming lenses, and discloses a day and night dual-purpose gun aiming lens, which comprises a lens barrel, and a first convex-concave lens, a first doublet lens, a second doublet lens, a first biconvex lens and a second convex-concave lens are sequentially fixed in the lens barrel along the direction from an object plane to an image plane; in actual use, for the gun sight lens provided by the utility model, the sighting distance of the arranged lens structure can be from 300mm to infinity, the size of an image space target surface is 3.4 mm, the visual field range of an object space is 6 degrees, the F number of a lens aperture is 1.3, the definition of the object space can be 24lp / mm, and the optical distortion is less than 0.2%. Therefore, the long-enough aiming distance and the good definition can enable the sighting telescope to meet the requirements of daily use and night use at the same time.

Description

Technical Field

[0001] The utility model relates to the technical field of gun aiming lenses, in particular to a day and night dual-purpose gun aiming lens. Background Art

[0002] A gun sight lens, an optical device used to observe distant targets, allows the user to see the details of the object more clearly, expanding the human eye's ability to observe distant objects.

[0003] When the existing gun sight lens is used during the day, due to sufficient light, the observation is clear, but at night, due to insufficient light, the object cannot be observed clearly, and the aiming distance of the existing gun sight lens is also limited, and long-distance aiming cannot be performed, which has great usage restrictions. Utility Model Content

[0004] In view of the shortcomings of the background technology, the utility model provides a day and night dual-purpose gun sight lens, and the technical problem to be solved is that the existing gun sight lens cannot clearly observe objects when used at night, and the aiming distance is limited.

[0005] In order to solve the above technical problems, the utility model provides the following technical solutions: a day and night dual-purpose rifle aiming lens, comprising a lens barrel, in which a first convex-concave lens, a first double-cemented lens, a second double-cemented lens, a first double-convex lens and a second convex-concave lens are fixed in sequence along the direction from the object plane to the image plane;

[0006] The first double-glued lens includes a second double-convex lens and a first double-concave lens glued together, and the second double-glued lens includes a second double-concave lens and a third double-convex lens glued together;

[0007] The right concave surface of the first convex-concave lens is arranged adjacent to the left convex surface of the second biconvex lens, the right concave surface of the first biconcave lens is arranged adjacent to the left concave surface of the second biconcave lens, the right convex surface of the third biconvex lens is arranged adjacent to the left convex surface of the first biconvex lens, and the right convex surface of the first biconvex lens is arranged adjacent to the left convex surface of the second convex-concave lens.

[0008] In some embodiments, the rifle scope lens has a positive optical power and a focal length of 30 mm.

[0009] In some embodiments, the first convexo-concave lens has positive optical power, the first double-glued lens has negative optical power, the second double-glued lens has negative optical power, the first double convex lens has positive optical power, and the second convexo-concave lens has positive optical power.

[0010] In a certain implementation manner, the focal length of the rifle scope lens is recorded as fG, the focal length of the first convexo-concave lens is recorded as fL1, the focal length of the first double-cemented lens is recorded as fL2, the focal length of the second double-cemented lens is recorded as fL3, the focal length of the first double-convex lens is recorded as fL4, and the focal length of the second convexo-concave lens is recorded as fL5, then:

[0011] The focal length fL1 satisfies 1<|fL1 / fG|<2;

[0012] The focal length fL2 satisfies 1<|fL2 / fG|<2;

[0013] The focal length fL3 satisfies 10<|fL3 / fG|<15;

[0014] The focal length fL4 satisfies 0.5<|fL4 / fG|<1;

[0015] The focal length fL5 satisfies 2.5<|fL5 / fG|<5.

[0016] In some implementations, the distance between the right side surface of the lens barrel and the image plane is 10 mm.

[0017] In some embodiments, within the lens barrel,

[0018] A first spacer is provided between the first biconvex lens and the second convexo-concave lens, and two sides of the first spacer are respectively against the right convex surface of the first biconvex lens and the left convex surface of the second convexo-concave lens;

[0019] A second spacer is provided between the right convex surface of the third biconvex lens and the left convex surface of the first biconvex lens, and two sides of the second spacer respectively abut against the right convex surface of the third biconvex lens and the left convex surface of the first biconvex lens;

[0020] A third spacer is provided between the right concave surface of the first biconcave lens and the left concave surface of the second biconcave lens, and two sides of the third spacer respectively abut against the right concave surface of the first biconcave lens and the left concave surface of the second biconcave lens;

[0021] A fourth spacer is provided between the right concave surface of the first convex-concave lens and the left convex surface of the second biconvex lens, and two sides of the fourth spacer respectively abut against the right concave surface of the first convex-concave lens and the left convex surface of the second biconvex lens;

[0022] A pressing ring for pressing the first convex-concave lens onto the fourth spacer is provided on the left side of the left convex surface of the first convex-concave lens.

[0023] In a certain embodiment, a first limiting groove, a first sealing groove and a second limiting groove are sequentially provided on the outer surface of the lens barrel along the direction from the object plane to the image plane;

[0024] A first snap ring is sleeved in the first limiting groove, a third snap ring is sleeved in the second limiting groove, the third snap ring abuts against the first snap ring, a second snap ring is provided on the inner side surface of one end of the first snap ring close to the third snap ring, and a fourth snap ring is provided on the outer side surface of one end of the third snap ring away from the first snap ring;

[0025] The third clamping ring covers the first sealing groove, and a first sealing ring is arranged in the first sealing groove.

[0026] In a certain embodiment, the third retaining ring is provided with a second sealing groove, the second sealing groove is provided with a second sealing ring, and the fourth retaining ring presses the second sealing ring.

[0027] Compared with the prior art, the utility model has the following beneficial effects: for the gun aiming lens of the utility model, the aiming distance of the lens structure set therein can be from 300mm to infinity, the image target surface size is 3.4mm, the object field of view range is 6 degrees, the lens aperture F number is 1.3, the object clarity can be achieved to be 24lp / mm, and the optical distortion is less than 0.2%. Therefore, its sufficiently long aiming distance and good clarity can enable the utility model to meet the needs of both daytime and nighttime use. BRIEF DESCRIPTION OF THE DRAWINGS

[0028] Figure 1 It is an internal cross-sectional view of the utility model in the embodiment;

[0029] Figure 2 It is a three-dimensional schematic diagram of the utility model in the embodiment;

[0030] Figure 3 for Figure 2 A schematic diagram of the structure in which the first and second clamping rings are removed;

[0031] Figure 4 for Figure 3 The structural schematic diagram without the third clasp;

[0032] Figure 5 is a schematic structural diagram of a lens barrel in an embodiment;

[0033] Figure 6 This is a schematic diagram of the MTF simulation of the utility model;

[0034] Figure 7 It is a distortion simulation schematic diagram of the utility model. DETAILED DESCRIPTION

[0035] Now the utility model is further described in detail with reference to the accompanying drawings. These drawings are simplified schematic diagrams, which only illustrate the basic structure of the utility model in a schematic manner, and therefore only show the components related to the utility model.

[0036] like Figure 1 As shown, a day and night dual-purpose rifle sight lens comprises a lens barrel 1, in which a first convex-concave lens 2, a first double-cemented lens 3, a second double-cemented lens 4, a first double-convex lens 5 and a second convex-concave lens 6 are sequentially fixed along the direction from the object plane to the image plane.

[0037] The first double-cemented lens 3 includes a second double-convex lens 30 and a first double-concave lens 31 that are glued together, and the second double-cemented lens 4 includes a second double-concave lens 40 and a third double-convex lens 41 that are glued together;

[0038] The right concave surface of the first convex-concave lens 2 is arranged adjacent to the left convex surface of the second biconvex lens 30, the right concave surface of the first biconvex lens 31 is arranged adjacent to the left concave surface of the second biconvex lens 40, the right convex surface of the third biconvex lens 41 is arranged adjacent to the left convex surface of the first biconvex lens 5, and the right convex surface of the first biconvex lens 5 is arranged adjacent to the left convex surface of the second convex-concave lens 6.

[0039] Specifically, the middle-aged rifle scope lens in this embodiment has positive optical power and a focal length of 30 mm.

[0040] In order to realize that the gun sight lens has positive optical power, the optical power parameters of the lenses in this embodiment are as follows: the first convex-concave lens 2 has positive optical power, the first double-glued lens 3 has negative optical power, the second double-glued lens 4 has negative optical power, the first double convex lens 5 has positive optical power, and the second convex-concave lens 6 has positive optical power.

[0041] In this embodiment, the focal length parameters of the lenses are set as follows: the focal length of the rifle sight lens is recorded as fG, the focal length of the first convexo-concave lens 2 is recorded as fL1, the focal length of the first double-cemented lens 3 is recorded as fL2, the focal length of the second double-cemented lens 4 is recorded as fL3, the focal length of the first double-convex lens 5 is recorded as fL4, and the focal length of the second convexo-concave lens 6 is recorded as fL5, then:

[0042] The focal length fL1 satisfies 1<|fL1 / fG|<2;

[0043] The focal length fL2 satisfies 1<|fL2 / fG|<2;

[0044] The focal length fL3 satisfies 10<|fL3 / fG|<15;

[0045] The focal length fL4 satisfies 0.5<|fL4 / fG|<1;

[0046] The focal length fL5 satisfies 2.5<|fL5 / fG|<5.

[0047] The rifle scope lens is used to image distant objects, and the imaging surface is the image plane. In this embodiment, the distance between the right side surface of the lens barrel 1 and the image plane is 10 mm.

[0048] For the gun aiming lens of the utility model, the aiming distance of the lens structure can be from 300mm to infinity, the image target surface size is 3.4mm, the object field of view is 6 degrees, the lens aperture F number is 1.3, and the object clarity can be achieved to be 24lp / mm, and the optical distortion is less than 0.2%. Therefore, its sufficiently long aiming distance and good clarity can enable the utility model to meet both daytime and nighttime use needs.

[0049] In addition, the working band of the utility model is 486nm to 770nm, which can achieve clear imaging from visible light to near infrared, and can be used in both daytime scenes and night scenes.

[0050] In this embodiment, each lens is fixed in the following manner:

[0051] In the lens barrel 1,

[0052] A first spacer 7 is provided between the first biconvex lens 4 and the second convexo-concave lens 5. The first spacer 10 has two sides that respectively abut against the right convex surface of the first biconvex lens 4 and the left convex surface of the second convexo-concave lens 5; wherein the first spacer 7 presses the second convexo-concave lens 5 tightly into the lens barrel 1;

[0053] A second spacer 8 is provided between the right convex surface of the third biconvex lens 32 and the left convex surface of the first biconvex lens 4, and the two sides of the second spacer 8 respectively abut against the right convex surface of the third biconvex lens 32 and the left convex surface of the first biconvex lens 4; wherein the first biconvex lens 4 can be pressed and fixed by the second spacer 8 and the first spacer 7;

[0054] A third spacer ring 9 is provided between the right concave surface of the first biconcave lens 31 and the left concave surface of the second biconcave lens 40, and the two sides of the third spacer ring 9 respectively abut against the right concave surface of the first biconcave lens 31 and the left concave surface of the second biconcave lens 40; the second glued lens 4 can be pressed and fixed by the third spacer ring 9 and the second spacer ring 8; in addition, a through hole is provided on the third spacer ring 9, and the through hole is also used as a diaphragm of the utility model;

[0055] A fourth spacer 10 is provided between the right concave surface of the first convex-concave lens 2 and the left convex surface of the second biconvex lens 30, and the two sides of the fourth spacer 10 respectively abut against the right concave surface of the first convex-concave lens 2 and the left convex surface of the second biconvex lens 30; wherein the first glued lens 3 can be pressed and fixed by the fourth spacer 10 and the third spacer 9;

[0056] A pressing ring 11 for pressing the first convex-concave lens 2 onto the fourth spacer ring 10 is provided on the left side of the left convex surface of the first convex-concave lens 2 .

[0057] like Figure 5 As shown, in this embodiment, a first limiting groove 18, a first sealing groove 19 and a second limiting groove 20 are sequentially provided on the outer surface of the lens barrel 1 along the direction from the object plane to the image plane;

[0058] Reference Figure 1 and Figure 2 The first retaining groove 18 is sleeved with a first snap ring 12, and the second retaining groove 20 is sleeved with a third snap ring 14, wherein the third snap ring 14 fixes the first snap ring 12 and the third snap ring 14 by abutting against the side wall of the second retaining groove 20 away from the first snap ring 12 and against the first snap ring 12, and the inner side surface of the end of the first snap ring 12 close to the third snap ring 14 is provided with a second snap ring 13, and the outer side surface of the end of the third snap ring 14 away from the first snap ring 12 is provided with a fourth snap ring 15;

[0059] The third clamping ring 14 covers the first sealing groove 19 , and the first sealing ring 16 is disposed in the first sealing groove 19 .

[0060] Specifically, in the present embodiment, the first retaining ring 12 cooperates with the second retaining ring 13 by means of threads. In actual operation, the second retaining ring 13 needs to be moved to the left and tightly fitted with the end face of the first retaining ring 12; the third retaining ring 14 cooperates with the fourth retaining ring 15 by means of threads. A locking thread is provided on the outer side face of the end of the third retaining ring 14 which is away from the first retaining ring 12. In actual operation, the locking thread of the third retaining ring 14 needs to be precisely fitted with the bearing surface of the fourth retaining ring 15.

[0061] Reference Figure 1 In this embodiment, a second sealing groove is provided on the third clamping ring 14 , a second sealing ring 17 is provided in the second sealing groove, and the fourth clamping ring 15 presses the second sealing ring 17 .

[0062] In actual use, the first sealing ring 16 and the second sealing ring 17 can be used to isolate the entire lens from external dust.

[0063] The utility model is subjected to MTF simulation, and its simulation schematic diagram is as follows: Figure 6 As shown, the present invention is subjected to distortion simulation, and the simulation schematic diagram is shown in Figure 7 As shown, from Figure 6 and Figure 7 It can be obtained that the utility model can achieve an object-side clarity of 24lp / mm (MTF>20% at this time) and an optical distortion of less than 0.2%.

[0064] The above is based on the enlightenment of this utility model. Through the above description, relevant staff can make various changes and modifications without deviating from the technical idea of ​​this utility model. The technical scope of this utility model is not limited to the content in the specification, and its technical scope must be determined according to the scope of the claims.

Claims

1. A day and night dual-purpose rifle scope, characterized in that: It comprises a lens barrel, in which a first convex-concave lens, a first double-glued lens, a second double-glued lens, a first double-convex lens and a second convex-concave lens are fixed in sequence along the direction from the object plane to the image plane; The first double-glued lens includes a second double-convex lens and a first double-concave lens glued together, and the second double-glued lens includes a second double-concave lens and a third double-convex lens glued together; The right concave surface of the first convex-concave lens is arranged adjacent to the left convex surface of the second biconvex lens, the right concave surface of the first biconcave lens is arranged adjacent to the left concave surface of the second biconcave lens, the right convex surface of the third biconvex lens is arranged adjacent to the left convex surface of the first biconvex lens, and the right convex surface of the first biconvex lens is arranged adjacent to the left convex surface of the second convex-concave lens.

2. The day and night dual-purpose rifle scope lens according to claim 1, characterized in that: The rifle scope lens has a positive optical power and a focal length of 30 mm.

3. The day and night dual-purpose rifle scope lens according to claim 2, characterized in that: The first convexo-concave lens has positive optical power, the first double-glued lens has negative optical power, the second double-glued lens has negative optical power, the first double convex lens has positive optical power, and the second convexo-concave lens has positive optical power.

4. The day and night dual-purpose rifle scope lens according to claim 2, characterized in that: The focal length of the rifle sight lens is recorded as fG, the focal length of the first convex-concave lens is recorded as fL1, the focal length of the first double-glued lens is recorded as fL2, the focal length of the second double-glued lens is recorded as fL3, the focal length of the first double-convex lens is recorded as fL4, and the focal length of the second convex-concave lens is recorded as fL5, then: The focal length fL1 satisfies 1<|fL1 / fG|<2; The focal length fL2 satisfies 1<|fL2 / fG|<2; The focal length fL3 satisfies 10<|fL3 / fG|<15; The focal length fL4 satisfies 0.5<|fL4 / fG|<1; The focal length fL5 satisfies 2.5<|fL5 / fG|<5.

5. The day and night dual-purpose rifle scope lens according to claim 1, characterized in that: The distance between the right side surface of the lens barrel and the image plane is 10 mm.

6. A day and night dual-purpose rifle scope according to any one of claims 1 to 5, characterized in that: In the lens barrel, A first spacer is provided between the first biconvex lens and the second convexo-concave lens, and two sides of the first spacer are respectively against the right convex surface of the first biconvex lens and the left convex surface of the second convexo-concave lens; A second spacer is provided between the right convex surface of the third biconvex lens and the left convex surface of the first biconvex lens, and two sides of the second spacer respectively abut against the right convex surface of the third biconvex lens and the left convex surface of the first biconvex lens; A third spacer is provided between the right concave surface of the first biconcave lens and the left concave surface of the second biconcave lens, and two sides of the third spacer respectively abut against the right concave surface of the first biconcave lens and the left concave surface of the second biconcave lens; A fourth spacer is provided between the right concave surface of the first convex-concave lens and the left convex surface of the second biconvex lens, and two sides of the fourth spacer respectively abut against the right concave surface of the first convex-concave lens and the left convex surface of the second biconvex lens; A pressing ring for pressing the first convex-concave lens onto the fourth spacer is provided on the left side of the left convex surface of the first convex-concave lens.

7. The day and night dual-purpose rifle scope lens according to claim 6, characterized in that: The outer surface of the lens barrel is provided with a first limiting groove, a first sealing groove and a second limiting groove in sequence along the direction from the object plane to the image plane; A first snap ring is sleeved in the first limiting groove, a third snap ring is sleeved in the second limiting groove, the third snap ring abuts against the first snap ring, a second snap ring is provided on the inner side surface of one end of the first snap ring close to the third snap ring, and a fourth snap ring is provided on the outer side surface of one end of the third snap ring away from the first snap ring; The third clamping ring covers the first sealing groove, and a first sealing ring is arranged in the first sealing groove.

8. The day and night dual-purpose rifle scope lens according to claim 7, characterized in that: The third clamping ring is provided with a second sealing groove, the second sealing groove is provided with a second sealing ring, and the fourth clamping ring presses the second sealing ring.

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