range finder telescope

Abstract

The application relates to the distance measurement field and discloses a distance measurement telescope, which comprises a distance measurement module, a projection module and an eyepiece. The distance measurement module is used for acquiring distance measurement information of a target to be measured. The projection module comprises a projection source and a projection system, and the projection system is located between the projection source and the eyepiece. The projection source is used for displaying the distance measurement information of the target to be measured, so as to provide the projection system with light corresponding to the distance measurement information of the target to be measured, and the projection system projects the distance measurement information of the target to be measured to the focal plane of the eyepiece. In the case that the projection source can display the distance measurement information of the target to be measured and the projection system can project the distance measurement information of the target to be measured to the focal plane of the eyepiece, the projection module does not need to display the distance measurement information of the target to be measured in the form of broken code, and the user can view the target to be measured and the distance measurement information of the target to be measured through the eyepiece, so that the display effect of the distance measurement telescope on the distance measurement information of the target to be measured is improved.

Description

Technical Field

[0001] This application relates to the field of ranging technology, and more particularly to a ranging telescope. Background Technology

[0002] Rangefinding telescopes need to simultaneously perform telescopic functions and display range information. In related technologies, rangefinding telescopes primarily use segmented display methods to display range information. One such method is the use of high-transparency liquid crystal displays (LCDs), often simply called high-transparency LCD segmented display screens. These screens use liquid crystal switches to block external light from passing through the segmented areas, creating a black contrast to display the range information. However, in low light conditions, the contrast can be weak, resulting in poor display quality. Another method is the use of organic light-emitting diode (OLED) segmented display screens. However, OLED segmented display screens can only display range information by pre-setting the brightness of the segmented areas, offering a monotonous display format and potentially leading to poor overall range information display quality. Utility Model Content

[0003] This application provides a rangefinding telescope, which aims to improve the display effect of the rangefinding telescope on the rangefinding information of the target.

[0004] In a first aspect, this application provides a ranging telescope, comprising:

[0005] A ranging module, comprising an eyepiece; the ranging module is used to acquire ranging information of the target to be measured;

[0006] A projection module includes a projection source and a projection system, the projection system being located between the projection source and the eyepiece; the projection source is used to display the ranging information of the target to be measured, so as to provide the projection system with the light corresponding to the ranging information of the target to be measured, so that the projection system projects the ranging information of the target to be measured onto the focal plane of the eyepiece.

[0007] In one embodiment, the ranging information of the target to be measured is magnified and projected onto the focal plane of the eyepiece by the projection system.

[0008] In one embodiment, the projection system magnifies the ranging information of the target under test by a factor of 3-4.7.

[0009] In one embodiment, the ranging telescope further includes a turning prism, which is located between the projection system and the eyepiece; the ranging information of the target to be measured is projected onto the focal plane of the eyepiece through the projection system and the turning prism.

[0010] In one embodiment, the projection system and the eyepiece are arranged at a preset angle.

[0011] In one embodiment, the preset angle includes 130° - 140°.

[0012] In one embodiment, the aperture number of the projection system is greater than or equal to the aperture number of the eyepiece.

[0013] In one embodiment, the aperture number of the projection system is greater than or equal to 5.2.

[0014] In one embodiment, the focal length of the projection system includes 6mm - 11mm.

[0015] In one embodiment, the projection system includes a first lens, a second lens, a third lens, and a fourth lens arranged in sequence from the object side to the image side;

[0016] The first lens has a positive optical power, the second lens has a negative optical power, the third lens has a positive optical power, and the fourth lens has a positive optical power;

[0017] The projection system satisfies the following expressions:

[0018] 0.5 < f1 / EFL < 1.1; and / or,

[0019] -0.7 < f2 / EFL < -0.3; and / or,

[0020] -1.6 < EFL1 / EFL < -1; and / or,

[0021] 0.5 < BFL / TTL < 1;

[0022] Where f1 is the focal length of the first lens, f2 is the focal length of the second lens, EFL1 is the combined focal length corresponding to the first lens and the second lens, EFL is the focal length of the projection system, BFL is the back focal length of the projection system, and TTL is the total optical length of the projection system.

[0023] This application provides a ranging telescope, which includes a ranging module and an eyepiece. The ranging module is used to acquire ranging information of a target. A projection module includes a projection source and a projection system, with the projection system located between the projection source and the eyepiece. The projection source displays the ranging information of the target and provides light corresponding to the ranging information of the target to the projection system, allowing the projection system to project the ranging information of the target onto the focal plane of the eyepiece. When the projection source can display the ranging information of the target, and the projection system can project the ranging information of the target onto the focal plane of the eyepiece, the projection module does not need to use a segmented display method to display the ranging information of the target. Furthermore, the user can view the target and its ranging information through the eyepiece, which improves the display effect of the ranging telescope on the ranging information of the target. Attached Figure Description

[0024] To more clearly illustrate the technical solutions of the embodiments of this application, the drawings used in the description of the embodiments will be briefly introduced below. Obviously, the drawings described below are some embodiments of this application. For those skilled in the art, other drawings can be obtained from these drawings without creative effort.

[0025] Figure 1 This is a schematic block diagram of the structure of a ranging telescope in one embodiment of this application;

[0026] Figure 2 This is a schematic diagram of the structure of a ranging telescope according to an embodiment of this application;

[0027] Figure 3 This is a schematic diagram of the projection system according to an embodiment of this application;

[0028] Figure 4 This is a schematic diagram of the distortion curve of a projection system according to an embodiment of this application.

[0029] Explanation of reference numerals in the attached figures:

[0030] 100. Rangefinding telescope; 110. Rangefinding module; 111. Eyepiece; 1111. Focal plane; 120. Projection module; 121. Projection source; 122. Projection system; 1221. First lens; 1222. Second lens; 1223. Third lens; 1224. Fourth lens; 130. Steering prism. Detailed Implementation

[0031] The technical solutions of the embodiments of this application will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of this application, not all embodiments. Based on the embodiments of this application, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of this application.

[0032] It should be understood that all directional indications (such as up, down, left, right, front, back, etc.) in the embodiments of this application are only used to explain the relative positional relationship between the components in a certain specific posture.

[0033] It should also be understood that when an element is referred to as being "fixed to" or "set on" another element, it can be directly on the other element or may be connected to an intermediary element. When an element is referred to as being "connected to" another element, it can be directly connected to the other element or indirectly connected to the other element through an intermediary element.

[0034] The terminology used in this application specification is for the purpose of describing particular embodiments only and is not intended to limit the application. Descriptions using terms such as "first," "second," etc., are for descriptive purposes only and should not be construed as indicating or implying relative importance or implicitly specifying the number of indicated technical features. Thus, a feature defined as "first" or "second" may explicitly or implicitly include at least one of that feature.

[0035] like Figure 1 and Figure 2 As shown, Figure 1 This is a schematic block diagram of the structure of the ranging telescope 100 in one embodiment of this application. Figure 2 This is a schematic diagram of the structure of a ranging telescope 100 according to an embodiment of this application.

[0036] The ranging telescope 100 includes a ranging module 110 and a projection module 120. The ranging module 110 includes an eyepiece 111. The projection module 120 includes a projection source 121 and a projection system 122. The projection system 122 is located between the projection source 121 and the eyepiece 111.

[0037] The ranging module 110 is used to acquire ranging information of the target to be measured.

[0038] The projection source 121 is used to display the ranging information of the target to be measured, so as to provide the light corresponding to the ranging information of the target to be measured to the projection system 122, so that the projection system 122 projects the ranging information of the target to be measured onto the focal plane 1111 of the eyepiece 111.

[0039] For example, the eyepiece 111 of the rangefinding telescope 100 allows the user of the rangefinding telescope 100 to view the target to be measured. Correspondingly, when the projection module 120 projects the rangefinding information of the target to be measured onto the focal plane 1111 of the eyepiece 111 using the projection source 121 and the projection system 122, the user can simultaneously view the target to be measured and its rangefinding information through the eyepiece 111.

[0040] For example, projection source 121 may include a microdisplay. The microdisplay may include, for example, a micro OLED screen. Projection source 121 may have a corresponding size. The size of projection source 121 may be adapted to the object-side field of view range of projection system 122. The size of projection source 121 may include 0.12 feet to 1.42 feet. For example, the size of projection source 121 may include one of 0.12 feet, 0.13 feet, 0.39 feet, 0.5 feet, and 0.8 feet. Of course, the size of projection source 121 is not limited to these, and is not restricted herein.

[0041] When the size of the projection source 121 is adapted to the object-side field of view of the projection system 122, and the projection source 121 displays the ranging information of the target to be measured, the projection source 121 can provide the projection system 122 with the light corresponding to the ranging information of the target to be measured. Accordingly, the projection system 122 can transmit the light to the focal plane 1111 of the eyepiece 111, that is, project the ranging information of the target to be measured onto the focal plane 1111 of the eyepiece 111.

[0042] Since the projection source 121 itself has the capability to display the distance measurement information of the target, it can display this information in a variety of ways. For example, the projection source 121 can display the distance measurement information of the target in combination with different distance measurement information display templates. The distance measurement information display template can include at least one of the following: font, layout position, spacing between adjacent distance measurement information, etc. Different distance measurement information display templates can be pre-set, or they can be set or adjusted by the user; no restrictions are placed here.

[0043] Based on this, the ranging telescope 100 can use the projection module 120 to overcome the problem of poor display effect when displaying ranging information using the segmented code display method, thereby improving the display effect of the ranging telescope 100 on the ranging information of the target to be measured.

[0044] In one embodiment, the ranging information of the target to be measured is magnified and projected onto the focal plane 1111 of the eyepiece 111 by the projection system 122.

[0045] For example, the projection system 122 may have a magnified projection capability. When the projection source 121 displays the ranging information of the target to be measured, the display size of the ranging information of the target to be measured displayed by the projection source 121 is limited by the size of the projection source 121. In order to improve the user's visual experience when viewing the ranging information of the target to be measured through the ranging telescope 100, the projection system 122 can magnify and project the ranging information of the target to be measured onto the focal plane 1111 of the eyepiece 111, so that the size of the ranging information of the target to be measured seen by the user is larger than the display size of the ranging information of the target to be measured. This is equivalent to the ranging information of the target to be measured after magnification is larger than the ranging information of the target to be measured before magnification, thereby allowing the user to view the ranging information of the target to be measured more conveniently and better.

[0046] In one embodiment, the projection system 122 magnifies the ranging information of the target under test by a factor of 3-4.7.

[0047] For example, when designing the projection system 122, the display size of the magnified distance measurement information of the target being measured can be considered in relation to whether it suits the user's visual experience. For instance, if the display size of the magnified distance measurement information of the target being measured is still small, the user may still be unable to clearly see the magnified distance measurement information. If the display size of the magnified distance measurement information of the target being measured is too large, the distance measurement information may obstruct the user's view of the target. Therefore, to balance the user's visual experience when viewing the target and its distance measurement information, the magnification factor of the distance measurement information of the target being measured in the projection system 122 includes 3-4.7. For example, the magnification factor of the distance measurement information of the target being measured in the projection system 122 includes one of 3x, 3.2x, 3.5x, 3.7x, 4x, 4.2x, 4.3x, 4.6x, and 4.7x. Of course, the magnification factor of the distance measurement information of the target being measured in the projection system 122 is not limited to these values ​​and is not restricted here.

[0048] Taking an example where the size of the projection source 121 is 0.13 feet and the magnification of the distance measurement information of the target under test by the projection system 122 is 3 times, the display size of the distance measurement information of the target under test after being magnified and projected by the projection system 122 can be limited by the size of the projection source 121 after magnification and projection. For example, if it is limited to 0.39 feet, then the display size of the distance measurement information of the target under test after magnification and projection can be less than or equal to 0.39 feet. Of course, it is not limited to this, and no limitation is made here.

[0049] In one embodiment, the ranging telescope 100 further includes a steering prism 130, which is located between the projection system 122 and the eyepiece 111; the ranging information of the target to be measured is projected onto the focal plane 1111 of the eyepiece 111 via the projection system 122 and the steering prism 130.

[0050] For example, when designing the ranging telescope 100, based on the consideration of reducing the impact of the projection process of the projection system 122 on the ranging process of the ranging module 110 on the ranging process of the target, a steering prism 130 can be set between the projection system 122 and the eyepiece 111. Figure 2 As shown, when the projection source 121 displays the ranging information of the target to be measured, the projection system 122 can project the ranging information of the target to be measured onto the steering prism 130, and then project it onto the eyepiece 111 after passing through the steering prism 130. Correspondingly, the ranging module 110 of the ranging telescope 100 may also include other optical devices besides the eyepiece 111, which can acquire the ranging information of the target to be measured using the steering prism 130 and the eyepiece 111.

[0051] Based on this, when a steering prism 130 is set between the projection system 122 and the eyepiece 111, the ranging system and the projection system 122 can share the same eyepiece 111. Furthermore, when the projection system 122 projects the ranging information of the target to be measured onto the focal plane 1111 of the eyepiece 111, it will not adversely affect the ranging module 110's acquisition of the ranging information of the target to be measured. This is beneficial to improving the display effect of the ranging telescope 100 while maintaining the ranging effect of the ranging telescope 100.

[0052] In one embodiment, the projection system 122 and the eyepiece 111 are set at a preset angle.

[0053] For example, compared to when the projection system 122 and the eyepiece 111 are not set at a preset angle, when the projection system 122 and the eyepiece 111 are set at a preset angle, the projection size corresponding to both the projection system 122 and the eyepiece 111 in the horizontal direction can be reduced. Accordingly, when the projection system 122 and the eyepiece 111 are set at a preset angle, the projection system 122 can project the ranging information of the target to be measured onto the focal plane 1111 of the eyepiece 111 via the steering prism 130.

[0054] Based on this, when the projection system 122 and the eyepiece 111 are set at a preset angle, it is beneficial to reduce the size of the rangefinding telescope 100 while improving the display effect of the rangefinding telescope 100 on the rangefinding information of the target.

[0055] In one embodiment, the preset angle includes 130°-140°.

[0056] For example, the preset angle includes one of 130°, 132°, 135°, 136°, 137°, 139°, and 140°. Of course, the preset angle is not limited to these, and no limitation is made here.

[0057] In one embodiment, the aperture number of the projection system 122 is greater than or equal to the aperture number of the eyepiece 111.

[0058] The aperture number of the projection system 122 can be simply referred to as the F# of the projection system 122. The F# of the projection system 122 is determined based on the focal length of the projection system 122 and the diameter of the entrance pupil of the projection system 122. Since the projection system 122 needs to project the ranging information of the target to be measured onto the focal plane 1111 of the eyepiece 111, in the design of the ranging telescope 100, the aperture number of the projection system 122 can be greater than or equal to the aperture number of the eyepiece 111 to increase the aperture number of the projection system 122, reduce the pupil cutoff between the projection system 122 and the eyepiece 111, and thus improve the display effect of the ranging telescope 100 on the ranging information of the target to be measured.

[0059] In one embodiment, the aperture number of the projection system 122 is greater than or equal to 5.2.

[0060] For example, the aperture number of the projection system 122 includes one of 5.2, 5.3, 5.5, and 6.2. Of course, the aperture number of the projection system 122 is not limited to these, and is not restricted here.

[0061] Taking an aperture number of 5.2 for the projection system 122 as an example, the aperture number of the eyepiece 111 can be 3.9. Since the aperture number of the projection system 122 is greater than that of the eyepiece 111, increasing the aperture number of the projection system 122 helps to reduce the pupil cutoff between the projection system 122 and the eyepiece 111, thereby improving the display effect of the ranging telescope 100 on the ranging information of the target.

[0062] When designing the projection system 122, the aperture number of the projection system 122 can be optimized to improve the projection effect of the projection system 122 on the distance measurement information of the target to be measured.

[0063] In one embodiment, the focal length of the projection system 122 includes 6mm-11mm.

[0064] For example, the focal length of the projection system 122 includes one of 6mm, 6.5mm, 7mm, 7.2mm, 8mm, 8.6mm, 9mm, 9.3mm, 10mm, 10.1mm, and 11mm. Of course, the focal length of the projection system 122 is not limited to these, and no limitation is made here.

[0065] When designing the projection system 122, the focal length of the projection system 122 can be optimized to improve the projection effect of the ranging information of the projection system 122 on the target to be measured.

[0066] In one embodiment, the projection system 122 includes a first lens 1221, a second lens 1222, a third lens 1223, and a fourth lens 1224 arranged in sequence from the object side to the image side; the first lens 1221 has a positive optical power, the second lens 1222 has a negative optical power, the third lens 1223 has a positive optical power, and the fourth lens 1224 has a positive optical power; the projection system 122 satisfies the following expressions:

[0067] 0.5 < f1 / EFL < 1.1; and / or,

[0068] -0.7 < f2 / EFL < -0.3; and / or,

[0069] -1.6 < EFL1 / EFL < -1; and / or,

[0070] 0.5 < BFL / TTL < 1;

[0071] where f1 is the focal length of the first lens 1221, f2 is the focal length of the second lens 1222, EFL1 is the combined focal length corresponding to the first lens 1221 and the second lens 1222, EFL is the focal length of the projection system 122, BFL is the back focal length of the projection system 122, and TTL is the total optical length of the projection system 122.

[0072] As Figure 3 shown, the first lens 1221, the second lens 1222, the third lens 1223, and the fourth lens 1224 included in the projection system 122 can adopt a "positive-negative-positive-positive" structure, that is, the optical powers of the first lens 1221 to the fourth lens 1224 are positive, negative, positive, and positive in sequence, so as to improve the aperture number of the projection system 122 and reduce the pupil cutting between the projection system 122 and the eyepiece 111.

[0073] As Figure 1 、 Figure 2 and Figure 3As shown, when the projection source 121 displays the ranging information of the target to be measured, and provides the projection system 122 with the light rays corresponding to the ranging information of the target to be measured, the light rays corresponding to the ranging information of the target to be measured provided by the projection source 121 are sequentially projected onto the focal plane 1111 of the eyepiece 112 after passing through the first lens 1221, the second lens 1222, the third lens 1223, and the fourth lens 1224 of the projection system 122. However, this is not a limitation; the light rays corresponding to the ranging information of the target to be measured provided by the projection source 121 can first pass through the first lens 1221, the second lens 1222, the third lens 1223, and the fourth lens 1224 of the projection system 122, and then pass through the steering prism 130 before being projected onto the focal plane 1111 of the eyepiece 111. No restrictions are imposed here.

[0074] For example, the specific parameter settings of the first lens 1221 to the fourth lens 1224 included in the projection system 122 are shown in Table 1. The projection system 122 includes, for example, a finite conjugate 3x magnification projection system 122. The side of the first lens 1221 near the object side of the projection system 122 can be denoted as G1S1, the side of the first lens 1221 near the image side of the projection system 122 can be denoted as G1S2, the side of the second lens 1222 near the object side of the projection system 122 can be denoted as G2S1, the side of the second lens 1222 near the image side of the projection system 122 can be denoted as G2S2, and so on. When a steering prism 130 is provided in the rangefinding telescope 100, and the steering prism 130 is located between the projection system 122 and the eyepiece 111, the steering prism 130 can be located between the fourth lens 1224 of the projection system 122 and the eyepiece 111. The side of the steering prism 130 closest to the projection system 122 can be denoted as G5S1, and the side of the steering prism 130 closest to the eyepiece 111 can be denoted as G5S2. With the steering prism 130 provided in the rangefinding telescope 100, the back intercept of the projection system 122 can be determined jointly by the projection system 122 itself and the steering prism 130.

[0075] Table 1:

[0076]

[0077] The system parameter data of the projection system 122 after the above parameter settings are shown in Table 2.

[0078] Table 2:

[0079] <![CDATA[f1 / EFL]]> 0.899 <![CDATA[f2 / EFL]]> -0.507 EFL1 / EFL -1.450 BFL / TTL 0.742

[0080] The system parameter data of projection system 122 conforms to the aforementioned expression.

[0081] like Figure 4As shown, the overall distortion of the projection system 122 after the above parameter settings is less than 1%, which is beneficial to improving the projection effect of the projection system 122 on the ranging information of the target to be measured.

[0082] Based on this, the positive and negative combination of the first lens 1221 and the second lens 1222 of the projection system 122 is beneficial to increasing the aperture number of the projection system 122 and increasing the back intercept of the projection system 122, which is beneficial to improving the projection effect of the projection system 122 on the ranging information of the target under test, and thus improving the display effect of the ranging telescope 100 on the ranging information of the target under test.

[0083] In summary, in the embodiments of this application, when the projection source 121 can display the ranging information of the target to be measured, and the projection system 122 can project the ranging information of the target to be measured onto the focal plane 1111 of the eyepiece 111, the projection module 120 does not need to use a segmented display method to display the ranging information of the target to be measured, and the user can view the target to be measured and its ranging information through the eyepiece 111, which is beneficial to improving the display effect of the ranging telescope 100 on the ranging information of the target to be measured.

[0084] Without contradiction, those skilled in the art can combine and integrate the different embodiments or examples described in this specification, as well as the features of the different embodiments or examples.

[0085] The above description is merely a specific embodiment of this application, but the scope of protection of this application is not limited thereto. Any person skilled in the art can easily conceive of various equivalent modifications or substitutions within the technical scope disclosed in this application, and these modifications or substitutions should all be covered within the scope of protection of this application. Therefore, the scope of protection of this application should be determined by the scope of the claims.

Claims

1. A rangefinding telescope, characterized in that, Comprising: A ranging module, the ranging module including an eyepiece; the ranging module is used to obtain ranging information of a待测 target; A projection module, the projection module including a projection source and a projection system, the projection system being located between the projection source and the eyepiece; the projection source is used to display the ranging information of the待测 target, so as to provide light rays corresponding to the ranging information of the待测 target to the projection system, such that the projection system projects the ranging information of the待测 target onto the focal plane of the eyepiece.

2. The ranging telescope according to claim 1, characterized in that, The ranging information of the待测 target is magnified and projected onto the focal plane of the eyepiece by the projection system.

3. The ranging telescope according to claim 2, characterized in that, The magnification factor of the projection system for the ranging information of the待测 target is 3 - 4.

7.

4. The ranging telescope according to claim 1, characterized in that, The ranging telescope further includes a turning prism, the turning prism being located between the projection system and the eyepiece; the ranging information of the待测 target is projected onto the focal plane of the eyepiece through the projection system and the turning prism.

5. The ranging telescope according to claim 4, characterized in that, The projection system and the eyepiece are arranged at a preset angle.

6. The ranging telescope according to claim 5, characterized in that, The preset angle is 130° - 140°.

7. The ranging telescope according to claim 1, characterized in that, The aperture number of the projection system is greater than or equal to the aperture number of the eyepiece.

8. The ranging telescope according to claim 7, characterized in that, The aperture number of the projection system is greater than or equal to 5.

2.

9. The ranging telescope according to claim 7, characterized in that, The focal length of the projection system is 6 mm - 11 mm.

10. The rangefinding telescope according to any one of claims 1-9, characterized in that, The projection system includes a first lens, a second lens, a third lens, and a fourth lens arranged in sequence from the object side to the image side; The first lens has a positive optical power, the second lens has a negative optical power, the third lens has a positive optical power, and the fourth lens has a positive optical power; The projection system satisfies the following expressions: 0.5 < f1 / EFL < 1.1; and / or, -0.7 < f2 / EFL < -0.3; and / or, -1.6 < EFL1 / EFL < -1; and / or, 0.5 < BFL / TTL < 1; Where, f1 is the focal length of the first lens, f2 is the focal length of the second lens, EFL1 is the combined focal length corresponding to the first lens and the second lens, EFL is the focal length of the projection system, BFL is the back focal length of the projection system, and TTL is the overall optical length of the projection system.

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