Telescope

Abstract

The telescope comprises a lens assembly, a light shield, a lens barrel and a focusing mechanism, the lens barrel is installed between the light shield and the focusing mechanism, and the lens assembly comprises a first lens, a second lens, a third lens and a fourth lens which are sequentially distributed from the object side to the image side. The first lens, the second lens and the third lens are sequentially installed in the light shield from the object side to the image side, and the fourth lens is installed in the focusing mechanism. According to the telescope provided by the utility model, the lens assembly is arranged, and the lens assembly comprises four lenses, so that the requirement of the telescope on the imaging height is also considered while good phase difference in the view field range of the telescope is ensured, and the telescope has excellent imaging quality; according to the utility model, the filter is arranged on the focusing mechanism, so that the telescope can be applied to more use scenes by using the focusing mechanism, and the chromatic aberration between an image and an actual observed object is reduced.

Description

TECHNICAL FIELD

[0001] The utility model belongs to optical equipment technical field, concretely relates to a telescope. BACKGROUND

[0002] In prior art, the optical system of telescope applied to astronomical observation is usually composed of two or three lenses, the imaging height of the optical system composed of two or three lenses is small, and the observed picture has certain chromatic aberration from the actual picture, it is difficult to shoot satisfactory works by using only full-frame camera, and the size of the shooting field angle, the height of picture resolution and the control ability of picture noise point of full-frame camera are related to the imaging height of telescope, the optical system of existing telescope is difficult to meet the demand of imaging quality of telescope.

[0003] The information disclosed in this BACKGROUND section is only for the purpose of increasing the understanding of the background of the present utility model and should not be taken as an acknowledgement or any form of suggestion that this information forms prior art that is publicly known. SUMMARY

[0004] The utility model aims at providing a telescope, which can solve the technical problems of low imaging height and large chromatic aberration of existing telescope during shooting.

[0005] In order to realize the above-mentioned purpose, one embodiment of the utility model provides a telescope, the telescope includes a lens assembly, a light shield, a lens barrel and a focusing mechanism, the lens barrel is installed between the light shield and the focusing mechanism, the lens assembly includes a first lens, a second lens, a third lens and a fourth lens which are sequentially distributed from the object side to the image side, the first lens, the second lens and the third lens are sequentially installed in the light shield from the object side to the image side, and the fourth lens is installed in the focusing mechanism.

[0006] In one or more embodiments of the utility model, the object side of the first lens is a convex surface, and the image side is a concave surface; the object side and the image side of the second lens are both convex surfaces; the object side of the third lens is a concave surface, and the image side is a convex surface; the object side of the fourth lens is a convex surface, and the image side is a concave surface.

[0007] In one or more embodiments of the utility model, an objective lens frame is installed in the light shield, and the first lens, the second lens and the third lens are sequentially installed in the objective lens frame from the object side to the image side.

[0008] In one or more embodiments of the utility model, the focusing mechanism includes a fourth lens installation assembly, a focusing assembly and a camera connection assembly, wherein,

[0009] The fourth lens mounting assembly is mounted at one end of the lens barrel away from the lens hood, and the fourth lens is mounted in the fourth lens mounting assembly;

[0010] The focusing assembly is mounted at one end of the fourth lens mounting assembly away from the lens barrel.

[0011] The camera connecting assembly is mounted at one end of the focusing assembly away from the fourth lens mounting assembly.

[0012] In one or more embodiments of the present application, the fourth lens mounting assembly comprises a fourth lens group connecting seat, a fourth lens seat and a focusing seat connecting ring, wherein,

[0013] The fourth lens group connecting seat is mounted at one end of the lens barrel.

[0014] The fourth lens seat is mounted in the fourth lens group connecting seat, and the fourth lens is mounted in the fourth lens seat.

[0015] The focusing seat connecting ring is mounted outside the fourth lens group connecting seat.

[0016] In one or more embodiments of the present application, the focusing assembly comprises a sliding block seat, a sliding block, a focusing seat, a hand wheel, a gear shaft, a hand wheel seat, a lower sliding rail, an upper sliding rail and a focusing tube, the focusing seat is mounted at one side of the focusing seat connecting ring away from the third lens, the sliding block seat is mounted outside the focusing seat, the sliding block is mounted in the sliding block seat and fixedly mounted with the upper sliding rail; the upper sliding rail is fixedly mounted outside the focusing tube, the hand wheel seat is mounted outside the focusing seat, the gear shaft is mounted in the hand wheel seat and penetrates through the hand wheel seat, the hand wheel is mounted at both ends of the gear shaft, the lower sliding rail is fixedly mounted outside the focusing tube, the gear shaft is engaged with the lower sliding rail, and the focusing tube reciprocates on the focusing seat in the direction of the optical axis under the drive of the hand wheel.

[0017] In one or more embodiments of the present application, the camera connecting assembly comprises a camera rotary joint, an extension tube, an extension joint, a ring and a camera ring, the camera rotary joint is mounted at one end of the focusing tube away from the fourth lens, the extension tube is mounted at one end of the camera rotary joint away from the fourth lens, the extension joint is mounted at one end of the extension tube away from the fourth lens, the ring is mounted at one end of the extension joint away from the fourth lens, a filter is mounted in the ring, and the camera ring is mounted at one end of the ring away from the fourth lens.

[0018] In one or more embodiments of the present application, at least two groups of light barriers are sequentially mounted in the lens barrel between the third lens and the fourth lens.

[0019] In one or more embodiments of the present application, the telescope further comprises a clamping assembly, the clamping assembly comprising an upper clamping plate, a lower clamping plate, a connecting plate, a handle, and an adjusting rod, one end of the upper clamping plate and one end of the lower clamping plate being hingedly connected by a pivot, the other end of the upper clamping plate and the other end of the lower clamping plate being internally provided with the adjusting rod, the adjusting rod being threadedly connected with the upper clamping plate and the lower clamping plate; the handle is mounted on the upper clamping plate; and the connecting plate is mounted on the lower clamping plate.

[0020] In one or more embodiments of the present application, the end of the light shield is further provided with a lens cover.

[0021] Compared with the prior art, the telescope in the present application has excellent imaging quality by virtue of the lens assembly comprising four lenses, which not only ensures good aberration in the field of view of the telescope, but also meets the demand of the telescope on imaging height.

[0022] The filter in the present application is arranged on the focusing mechanism, and the telescope can be applied to more use scenarios by using the focusing mechanism, thereby reducing the chromatic aberration between imaging and actual observation objects. BRIEF DESCRIPTION OF DRAWINGS

[0023] In order to more clearly illustrate the technical solutions in the embodiments of the present application or the prior art, the drawings needed in the embodiments or the prior art description will be briefly introduced below. Obviously, the drawings in the following description are only some embodiments of the present application, and other drawings can be obtained by those skilled in the art without creative labor on the basis of these drawings.

[0024] Figure 1 FIG. 1 is a structural view of the telescope in one specific embodiment of the present application;

[0025] Figure 2 FIG. 2 is a top view of the telescope in one specific embodiment of the present application;

[0026] Figure 3 FIG. 3 is a sectional view of the telescope in one specific embodiment of the present application;

[0027] Figure 4 FIG. 4 is a sectional view of the focusing mechanism in one specific embodiment of the present application;

[0028] Figure 5 FIG. 5 is a schematic diagram of the optical path of the telescope in one specific embodiment of the present application.

[0029] Explanation of main reference signs: 1, lens assembly, 11, first lens, 12, second lens, 13, third lens, 14, fourth lens, 15, filter, 2, lens hood, 3, lens barrel, 4, focusing mechanism, 41, fourth lens mounting assembly, 411, fourth lens group connecting seat, 412, fourth lens seat, 413, focusing seat connecting ring, 42, focusing assembly, 421, slider seat, 422, slider, 423, focusing seat, 424, hand wheel, 425, gear shaft, 426, hand wheel seat, 427, lower sliding rail, 428, upper sliding rail, 429, focusing tube, 43, camera connecting assembly, 431, camera rotary joint, 432, extension tube, 433, extension joint, 434, connecting ring, 435, camera ring, 5, clamping assembly, 51, upper clamping plate, 52, lower clamping plate, 53, connecting plate, 54, handle, 55, adjusting rod, 6, finder mirror seat, 7, lens cover, 8, aperture. DETAILED DESCRIPTION

[0030] In order to make the technical personnel in the technical field better understand the technical solutions in the present application, the technical solutions in the embodiments of the present application will be clearly and completely described below with reference to the drawings in the embodiments of the present application. Obviously, the described embodiments are only part of the embodiments of the present application, not all the embodiments. Based on the embodiments in the present application, all other embodiments obtained by those skilled in the art without creative labor should belong to the scope of protection of the present application.

[0031] In the description of the present application, it should be understood that the terms "vertical", "horizontal", "top", "bottom", "upper", "lower", "front", "rear" and the like indicate the orientation or positional relationship based on the orientation or positional relationship shown in the drawings, and are only for the convenience of describing the present application and simplifying the description, and therefore cannot be understood as indicating or implying that the devices or elements referred to must have a particular orientation, be constructed and operated in a particular orientation, and therefore cannot be understood as limiting the present application.

[0032] Referring to Figures 1-2 As shown in the drawings, the telescope in the embodiment of the present application comprises: a lens assembly 1, a lens hood 2, a lens barrel 3 and a focusing mechanism 4, the lens barrel 3 is installed between the lens hood 2 and the focusing mechanism 4, the lens assembly 1 comprises a first lens 11, a second lens 12, a third lens 13 and a fourth lens 14 distributed in order from the object side to the image side, the first lens 11, the second lens 12 and the third lens 13 are installed in order from the object side to the image side in the lens hood 2, and the fourth lens 14 is installed in the focusing mechanism 4.

[0033] The optical axes of the first lens 11, the second lens 12, the third lens 13 and the fourth lens 14 coincide with each other, the first lens 11, the second lens 12 and the third lens 13 are spaced apart by the spacer, and the four lenses can be made of various materials, which can ensure the color difference and spherical aberration of the entire telescope and also ensure good aberration in the field of view, so that the entire telescope has high imaging quality.

[0034] Referring to Figure 3 As shown in the further embodiment, the object side of the first lens 11 is convex, and the image side is concave; the object side and the image side of the second lens 12 are both convex; the object side of the third lens 13 is concave, and the image side is convex; the object side of the fourth lens 14 is convex, and the image side is concave.

[0035] Referring to Figure 5 As shown, by setting the above four lens groups, the effective aperture of the telescope in the embodiment is D=90mm, the focal length F=630mm, and the focal ratio f=7. The lens assembly in the embodiment effectively solves the problems of low imaging height and poor quality of the entire telescope.

[0036] In a further embodiment, an objective lens frame 21 is installed in the light shield 2, and the first lens 11, the second lens 12 and the third lens 13 are sequentially installed in the objective lens frame 21 from the object side to the image side.

[0037] The first lens 11, the second lens 12 and the third lens 13 are sequentially installed in the objective lens frame 21 by setting the spacer in the objective lens frame 21. In the embodiment, the objective lens frame 21 is fixedly arranged relative to the lens barrel 3.

[0038] Referring to Figure 4 As shown in the further embodiment, the focusing mechanism 4 includes a fourth lens mounting assembly 41, a focusing assembly 42 and a camera connecting assembly 43. The fourth lens mounting assembly 41 is installed at the end of the lens barrel 3 away from the light shield 2, and the fourth lens 14 is installed in the fourth lens mounting assembly 41. The focusing assembly 42 is installed at the end of the fourth lens mounting assembly 41 away from the lens barrel 3. The camera connecting assembly 43 is installed at the end of the focusing assembly 42 away from the fourth lens mounting assembly 41.

[0039] In a further embodiment, the fourth lens mounting assembly 41 includes a fourth lens group connecting seat 411, a fourth lens seat 412 and a focusing seat connecting ring 413. The fourth lens group connecting seat 411 is installed at the end of the lens barrel 3. The fourth lens seat 412 is installed in the fourth lens group connecting seat 411, and the fourth lens 14 is installed in the fourth lens seat 412. The focusing seat connecting ring 413 is installed on the outside of the fourth lens group connecting seat 411.

[0040] The fourth lens 14 is installed in the fourth lens group connecting seat 411 through the fourth lens seat 412, and the fourth lens group connecting seat 411 is fixedly installed at the end of the lens barrel 3 away from the third lens 13. Thus, the optical system of the telescope in the embodiment is installed with four lenses, each of which can be made of a corresponding material according to a use scenario, so as to ensure good aberration in a field of view range while taking into account chromatic aberration and spherical aberration of the optical system. The manufacturing material of each lens is easy to obtain. In a specific implementation, the telescope in the embodiment has an image height of at least 44 mm and can be applied to a full-frame camera.

[0041] In a further embodiment, the focusing assembly 42 includes a slider seat 421, a slider 422, a focusing seat 423, a hand wheel 424, a gear shaft 425, a hand wheel seat 426, a lower sliding rail 427, an upper sliding rail 428, and a focusing tube 429. The focusing seat 423 is installed at the side of the focusing seat connecting ring 413 away from the third lens 13. The slider seat 421 is installed outside the focusing seat 423. The slider 422 is installed in the slider seat 421 and fixedly installed with the upper sliding rail 428. The upper sliding rail 428 is fixedly installed outside the focusing tube 429. The hand wheel seat 426 is installed outside the focusing seat 423. The gear shaft 425 is installed in the hand wheel seat 426 and penetrates the hand wheel seat 426. The hand wheel 424 is installed at both ends of the gear shaft 425. The lower sliding rail 427 is fixedly installed outside the focusing tube 429. The gear shaft 425 is engaged with the lower sliding rail 427. The focusing tube 429 reciprocates in the focusing seat 423 in a first direction under the drive of the hand wheel 424.

[0042] The upper side of the focusing tube 429 is fixedly installed with the upper sliding rail 428, and the upper sliding rail 428 is slidingly installed with the slider 422. The slider 422 is installed on the focusing seat 423 through the slider seat 421, and the focusing seat 423 is fixedly installed relative to the lens barrel 3. The lower side of the focusing tube 429 is fixedly installed with the lower sliding rail 427, and the lower surface of the lower sliding rail 427 is provided with a gear. The lower sliding rail 427 is engaged with the gear on the gear shaft 425. The gear shaft 425 is rotatably installed on the hand wheel seat 426 through a bearing. The gear shaft 425 is provided with the hand wheel 424 at both ends. Thus, the focusing tube 429 can reciprocate along the optical axis direction by rotating the hand wheel 424. To confirm the moving distance of the focusing tube 429, the focusing tube 429 is provided with a scale. The focusing seat 423 is further provided with the finder seat 6 for installing the finder, so as to facilitate the telescope to find an observation object.

[0043] The camera connecting assembly 43 comprises a camera rotating joint 431, an extension tube 432, an extension joint 433, a ring 434, and a camera ring 435. The camera rotating joint 431 is installed at the end of the focusing tube 429 away from the fourth lens 14. The extension tube 432 is installed at the end of the camera rotating joint 431 away from the fourth lens 14. The extension joint 433 is installed at the end of the extension tube 432 away from the fourth lens 14. The ring 434 is installed at the end of the extension joint 433 away from the fourth lens 14. The filter 15 is installed in the ring 434. The camera ring 435 is installed at the end of the ring 434 away from the fourth lens 14.

[0044] The entire camera connecting assembly 43 is installed at the end of the focusing tube 429. The filter 15 is arranged in the camera connecting assembly 43. The distance between the filter 15 and the lens assembly 1 changes under the reciprocating motion of the focusing assembly 42. The filter 15 is used to reduce the chromatic aberration between the imaging and the actual observation object. By adjusting the position of the filter 15, the field of view of different distances can be adapted.

[0045] In further embodiments, at least two groups of diaphragms 8 are sequentially installed in the lens barrel 3 between the third lens 13 and the fourth lens 14.

[0046] The diaphragm 8 arranged in the lens barrel 3 is used to resist stray light entering the telescope, further ensuring the imaging quality.

[0047] In further embodiments, the telescope further comprises a clamping assembly 5. The clamping assembly 5 comprises an upper clamping plate 51, a lower clamping plate 52, a connecting plate 53, a handle 54, and an adjusting rod 55. One end of the upper clamping plate 51 and one end of the lower clamping plate 52 are hingedly connected by a rotating shaft. The other end of the upper clamping plate 51 and the other end of the lower clamping plate 52 are arranged to accommodate the adjusting rod 55. The adjusting rod 55 is threadedly connected to the upper clamping plate 51 and the lower clamping plate 52. The handle 54 is arranged on the upper clamping plate 51. The connecting plate 53 is arranged on the lower clamping plate 52. The end of the light shield 2 is further provided with a lens cover 7.

[0048] By arranging the clamping assembly 5 on the lens barrel 3, the use of the telescope is more convenient. The upper clamping plate 51 and the lower clamping plate 52 in the clamping assembly 5 are adjusted by the adjusting rod 55, so that they can be adapted to lens barrels 3 of different sizes. The end of the light shield 2 is provided with the lens cover 7 to protect the lens.

[0049] It will be apparent to those skilled in the art that the application is not limited to the details of the above-exemplified embodiments and that the application can be implemented in other particular forms without departing from the spirit or essential characteristics of the application. The present embodiments are therefore to be considered in all respects as illustrative and not restrictive, the scope of the application being indicated by the appended claims rather than by the above description, and all changes which come within the meaning and range of equivalency of the claims are therefore intended to be embraced therein. No reference signs in the claims should be considered as limiting the scope of the claims.

[0050] Furthermore, it should be understood that although the description is made on the basis of the embodiments, not every embodiment contains only one independent technical solution, and the description manner of the specification is only for the sake of clarity, and those skilled in the art should consider the specification as a whole, and the technical solutions in each embodiment can also be properly combined to form other embodiments which can be understood by those skilled in the art.

Claims

1. A telescope, characterized in that: The telescope includes a lens assembly, a light shield, a lens barrel and a focusing mechanism, wherein the lens barrel is installed between the light shield and the focusing mechanism, the lens assembly includes a first lens, a second lens, a third lens and a fourth lens distributed in sequence from the object side to the image side, the first lens, the second lens and the third lens are installed in sequence from the object side to the image side in the light shield, and the fourth lens is installed in the focusing mechanism.

2. The telescope according to claim 1, wherein: The object side surface of the first lens is convex at the optical axis, and the image side surface is concave at the optical axis; the object side surface and the image side surface of the second lens are both convex at the optical axis; the object side surface of the third lens is concave at the optical axis, and the image side surface is convex at the optical axis; the object side surface of the fourth lens is convex at the optical axis, and the image side surface is concave at the optical axis.

3. The telescope according to claim 1, wherein: An objective lens frame is installed in the light shield, and the first lens, the second lens and the third lens are installed in the objective lens frame in sequence from the object side to the image side.

4. The telescope according to claim 1, wherein: The focusing mechanism includes a fourth lens mounting assembly, a focusing assembly, and a camera connecting assembly, wherein: The fourth lens mounting assembly is mounted on an end of the lens barrel away from the light shield, and the fourth lens is mounted in the fourth lens mounting assembly; The focusing assembly is mounted on an end of the fourth lens mounting assembly away from the lens barrel; The camera connecting assembly is mounted on an end of the focusing assembly away from the fourth lens mounting assembly.

5. The telescope according to claim 4, characterized in that The fourth lens mounting assembly includes a fourth lens group connecting seat, a fourth lens seat and a focus seat connecting ring, wherein: The fourth lens group connecting seat is installed at the end of the lens barrel; The fourth lens holder is installed in the fourth lens group connecting seat, and the fourth lens is installed in the fourth lens holder; The focus seat connecting ring is installed on the outer side of the fourth lens group connecting seat.

6. The telescope according to claim 5, characterized in that The focusing assembly includes a slider seat, a slider, a focusing seat, a handwheel, a gear shaft, a handwheel seat, a lower slide rail, an upper slide rail and a focusing tube. The focusing seat is installed on the side of the focusing seat connecting ring away from the third lens, the slider seat is installed on the outside of the focusing seat, the slider is installed in the slider seat and fixedly installed with the upper slide rail; the upper slide rail is fixedly installed on the outside of the focusing tube, the handwheel seat is installed on the outside of the focusing seat, the gear shaft is installed in the handwheel seat and passes through the handwheel seat, the handwheel is installed at both ends of the gear shaft, the lower slide rail is fixedly installed on the outside of the focusing tube, the gear shaft is meshed with the lower slide rail, and the focusing tube reciprocates on the focusing seat along the optical axis under the drive of the handwheel.

7. The telescope according to claim 6, characterized in that The camera connection assembly includes a camera rotating joint, an extension tube, an extension joint, an adapter ring and a camera ring. The camera rotating joint is installed at the end of the focusing tube away from the fourth lens, the extension tube is installed at the end of the camera rotating joint away from the fourth lens, the extension joint is installed at the end of the extension tube away from the fourth lens, the adapter ring is installed at the end of the extension joint away from the fourth lens, a filter is installed in the adapter ring, and the camera ring is installed at the end of the adapter ring away from the fourth lens.

8. The telescope according to claim 1, wherein: At least two groups of light barriers are sequentially installed in the lens barrel between the third lens and the fourth lens.

9. The telescope according to claim 1, wherein: The telescope also includes a clamping assembly, which includes an upper clamping plate, a lower clamping plate, a connecting plate, a handle, and an adjusting rod. One end of the upper clamping plate and one end of the lower clamping plate are hinged by a rotating shaft, and the adjusting rod is installed in the other end of the upper clamping plate and the other end of the lower clamping plate. The adjusting rod is engaged with the upper clamping plate and the lower clamping plate through threads; the handle is installed on the upper clamping plate; and the connecting plate is installed on the lower clamping plate.

10. The telescope according to claim 1, wherein: A lens cover is also installed on the end of the light shield.

Images