Corner relay lens

Abstract

The utility model provides a corner relay lens, which comprises a waterproof shell, an optical mechanism and a locking mechanism, the waterproof shell comprises a front shell and a rear shell, the front shell is provided with a first end and a second end, the second end is rotatably connected with the rear shell, the first end is provided with a first central axis, the rear shell is provided with a second central axis, and the second central axis is rotatably connected with the first central axis. The first central axis and the second central axis are arranged at an acute angle or an obtuse angle, the front shell and the rear shell define a mounting cavity, the optical mechanism is arranged in the mounting cavity and used for guiding imaging light acquired by the objective lens to the focusing device, and the locking mechanism is arranged on the front shell or the rear shell and used for locking the imaging light acquired by the objective lens to the focusing device. The locking device is used for locking the positions of the front shell and the rear shell. Due to the fact that the second end of the front shell and the rear shell can rotate relative to each other, and the central axis of the first end of the front shell and the central axis of the rear shell are arranged at the geometric angle, shooting can be carried out at an upward shooting visual angle during transverse shooting and vertical shooting, and the flexibility of underwater shooting is improved.

Description

Technical Field

[0001] The present application relates to the field of camera technology, and more specifically to a corner relay lens. Background Art

[0002] Underwater photography or videography focuses on two distinct shooting methods, macro and wide-angle. Macro photography refers to taking pictures as close as possible to smaller objects, preferably with images of objects that are close to or larger than the actual size of the object. Wide-angle photography is shooting from a wide angle, especially suitable for larger underwater creatures, creating a wild and mysterious effect of the deep sea world.

[0003] Traditional underwater macro photography systems usually consist of a waterproof glass lens barrel installed in the camera's waterproof housing and a land macro lens installed in the lens barrel. Traditional underwater wide-angle photography systems usually consist of a waterproof ball cover installed in the camera's waterproof housing and a land wide-angle lens installed in the ball cover. Due to the structural characteristics of the two systems, the traditional underwater macro photography system must be as close to the creature as possible, which will scare the creature away or be blocked by the underwater natural environment and cannot be approached. Due to the design of the ball cover, the traditional underwater wide-angle photography system cannot take close-up detailed images of small creatures even if the system is as close to the object as possible.

[0004] In order to solve the above problems, a conversion lens is invented in the prior art to facilitate the conversion of macro and wide-angle viewing angles underwater, and to facilitate the shooting of underwater creatures by using an objective lens with different viewing angles and / or different diameter front lenses. However, the optical axis of the conversion lens is arranged horizontally, which is more suitable for horizontal shooting. In addition, there is a certain center height between the housing of the conversion lens and the optical axis, so that when shooting some small creatures that like to hide or move on the beach underwater, in order to find a suitable shooting angle, the photographer may need to compose and take pictures close to the beach, which is extremely uncomfortable, and in some cases, it may be difficult to find a suitable shooting angle, which undoubtedly increases the difficulty of underwater photography. Utility Model Content

[0005] The present application provides a corner relay lens, which can quickly compose and shoot by shooting upward when changing the horizontal or vertical shooting mode, thereby reducing the difficulty of underwater shooting and improving the flexibility of underwater videography.

[0006] The present application provides a corner relay lens, comprising:

[0007] A waterproof housing, the waterproof housing comprising a front housing and a rear housing, the front housing having a first end and a second end, the first end being connected to an objective lens, the objective lens being used to obtain imaging light of an object to be photographed, the second end being rotatably connected to the rear housing, the first end having a first central axis, the rear housing having a second central axis, the first central axis and the second central axis being arranged at an acute angle or an obtuse angle, the rear housing being connected to a focusing device, and the front housing and the rear housing enclosingly forming a mounting cavity;

[0008] An optical mechanism, which is disposed in the mounting cavity and is used to guide the imaging light acquired by the objective lens to the focusing device;

[0009] And a locking mechanism, which is arranged on the front shell or the rear shell and is used to lock the positions of the front shell and the rear shell.

[0010] In one embodiment, the locking mechanism is arranged on the front shell, and a limiting groove is provided on the rear shell. The locking mechanism includes a locking portion. The locking mechanism has a locked state and an unlocked state. In the locked state, the locking portion extends into the limiting groove, and in the unlocked state, the locking portion withdraws from the limiting groove.

[0011] In one embodiment, the locking mechanism further includes a driving component and a locking component, the locking portion is arranged on the locking component, and the driving component can drive the locking component to extend into or withdraw from the limiting groove so that the locking mechanism can switch between the locked state and the unlocked state.

[0012] In one embodiment, the driving assembly includes a driving knob, a limiting pin, a rotating shaft and an elastic member. The driving knob can rotate around the rotating shaft. The driving knob is provided with an arc-shaped movable groove. The limiting pin is inserted into the arc-shaped movable groove to limit the rotation of the driving knob. The elastic member is arranged on a side of the locking assembly away from the driving knob. In the locked state, the driving knob abuts against the locking assembly to limit the movement of the locking assembly. The locking portion extends into the limiting groove, and the elastic member has an elastic restoring force that causes the locking portion to withdraw from the limiting groove. In the unlocked state, the driving knob is separated from the locking assembly to release the locking assembly, and the locking portion withdraws from the limiting groove.

[0013] In one embodiment, the locking assembly includes a locking block, a slider and an elastic pressure plate, the locking portion is arranged on the locking block, and the elastic pressure plate is arranged between the locking block and the slider along the direction of the second center axis. In the locked state, the elastic pressure plate is in a compressed state, and its elastic restoring force makes the locking portion in close contact with the limiting groove.

[0014] In one embodiment, the locking mechanism also includes a guide member, which extends in the direction of the second center axis. The locking assembly is movably mounted on the guide member. The driving assembly is disposed on one side of the guide member and can drive the locking assembly to move along the extension direction of the guide member.

[0015] In one embodiment, two limiting grooves are provided, and the limiting grooves are arranged along the circumference of the rear shell body. On the circumference of the rear shell body, the angle between the two limiting grooves is 90°.

[0016] In one embodiment, a first positioning frame and a second positioning frame are symmetrically provided on both sides of the front shell, the first positioning frame and the second positioning frame extend in the direction of the second central axis and extend to both sides of the rear shell, the locking mechanism is arranged on the first positioning frame and / or the second positioning frame, a first limiting member is arranged on the first positioning frame and the second positioning frame, and a second limiting member is arranged on the rear shell, the first limiting member and the second limiting member cooperate to limit the movement of the front shell and the rear shell along the direction of the second central axis; one of the first limiting member and the second limiting member is an annular groove, and the other is an arc-shaped protrusion, and the arc-shaped protrusion is clamped in the annular groove; a third limiting member is arranged on the first positioning frame and / or the second positioning frame, and a fourth limiting member is arranged on the rear shell, one of the third limiting member and the fourth limiting member is an arc groove, and the other is a limiting block, and the limiting block can be movably arranged in the arc groove to limit the rotation position of the front shell and the rear shell, and the angle of the arc groove is 90°.

[0017] In one embodiment, the first positioning frame and the second positioning frame each have a first side surface and a second side surface, the first side surface contacts the rear housing, and the second side surface contacts the front housing; a plurality of first drainage grooves are provided on the first side surface, and a plurality of second drainage grooves are provided on the second side surface, and the plurality of first drainage grooves respectively penetrate the first positioning frame and the second positioning frame along the direction of the second central axis, and are connected to the second drainage grooves;

[0018] The rear shell is provided with a plurality of third drainage grooves, the plurality of third drainage grooves are evenly arranged around the rear shell, and the third drainage grooves extend along the direction of the second central axis.

[0019] In one embodiment, the optical mechanism includes a front lens assembly, a reflection assembly and a rear lens assembly, wherein the reflection assembly is disposed between the front lens assembly and the rear lens assembly, and the reflection assembly can reflect a first imaging light emitted from the front lens assembly to form a second imaging light, and emit the second imaging light to the rear lens assembly, wherein the first imaging light has a first imaging optical axis, and the second imaging light has a second imaging optical axis, and the first imaging optical axis and the second imaging optical axis are arranged at an acute angle or an obtuse angle.

[0020] According to the angle relay lens in the above embodiment, it includes a waterproof shell, an optical mechanism and a locking mechanism. The waterproof shell includes a front shell and a rear shell. The front shell has a first end and a second end. The first end has a first central axis, and the second end is rotatably connected to the rear shell. The rear shell has a second central axis. The first central axis and the second central axis are set at an acute angle or an obtuse angle. The locking mechanism is set on the front shell or the rear shell to lock the position of the front shell and the rear shell. Since the first central axis and the second central axis are set at an acute angle or an obtuse angle, the second end of the front shell and the rear shell can rotate relative to each other, so that no matter when shooting horizontally or vertically, the first end can be set at an upward shooting angle by rotating the front shell, so that the objective lens connected to the first end can be composed and photographed by upward shooting, which facilitates underwater framing and shooting and improves the flexibility of underwater photography. Due to the setting of the locking mechanism, the front shell can be locked after it is rotated into place, ensuring the stability of the relay lens during the entire shooting process, thereby improving the final shooting quality. BRIEF DESCRIPTION OF THE DRAWINGS

[0021] Figure 1 is a schematic diagram of the structure of a relay lens in an embodiment;

[0022] Figure 2 for Figure 1 The top view of the structure of the relay lens in horizontal shooting;

[0023] Figure 3 for Figure 2 A cross-sectional view of the middle AA;

[0024] Figure 4 for Figure 1 Schematic diagram of the structure of the relay lens in vertical shooting;

[0025] Figure 5 for Figure 1 The structural side view of the relay lens in horizontal shooting;

[0026] Figure 6 A schematic diagram of the structure of a locking mechanism in an embodiment;

[0027] Figure 7 It is a schematic diagram of the structure explosion of the rear housing and the locking mechanism at a certain angle;

[0028] Figure 8 for Figure 7 Schematic diagram of the structural explosion from another angle.

[0029] Among them: 100, waterproof shell; 110, front shell; 111, first end; 112, second end; 120, rear shell; 121, limit groove; 1211, side wall; 1212, bottom wall; 1213, opening; 122, second limiter; 123, fourth limiter; 200, optical mechanism; 210, front lens assembly; 220, reflection assembly; 221, right triangle prism; 222, trapezoidal prism; 230, rear lens assembly; 300, locking mechanism; 310, drive assembly; 311, drive knob; 3111, arc shaped movable groove; 312, limiting pin; 313, rotating shaft; 314, elastic member; 320, locking assembly; 321, locking block; 3211, locking part; 322, sliding block; 323, elastic pressing sheet; 330, guide member; 400, first positioning frame; 410, first limiting member; 420, first side; 430, second side; 500, second positioning frame; 510, third limiting member; 600, drainage groove; 610, first drainage groove; 620, second drainage groove; 630, third drainage groove; 700, fixing member; 800, pin. DETAILED DESCRIPTION

[0030] The present application is further described in detail below by specific embodiments in conjunction with the accompanying drawings. Wherein similar elements in different embodiments adopt associated similar element numbers. In the following embodiments, many detailed descriptions are intended to enable the present application to be better understood. However, those skilled in the art can easily recognize that some of the features can be omitted in different situations, or can be replaced by other elements, materials, and methods. In some cases, some operations related to the present application are not shown or described in the specification, in order to avoid the core part of the present application being overwhelmed by too much description, and for those skilled in the art, it is not necessary to describe these related operations in detail, and they can fully understand the related operations based on the description in the specification and the general technical knowledge in the art.

[0031] In addition, the features, operations or characteristics described in the specification can be combined in any appropriate manner to form various implementations, and the operation steps involved in each embodiment can also be replaced or adjusted in a sequence in a manner that is obvious to those skilled in the art. Therefore, the specification and drawings are only for the purpose of clearly describing a certain embodiment and do not mean that the composition and / or sequence are necessary.

[0032] The serial numbers of the components in this document, such as "first", "second", etc., are only used to distinguish the objects described and do not have any order or technical meaning. The "connection" and "coupling" mentioned in this application, unless otherwise specified, include direct and indirect connections (couplings).

[0033] When shooting, the photographer will choose different shooting methods according to the situation of the object to be shot. For example, horizontal shooting can have a larger screen tolerance, can accommodate more scenery, and is more in line with the visual habits of our human eyes, showing a more balanced sense of atmosphere. Therefore, horizontal shooting is more suitable for shooting large scenes, such as landscapes and buildings. Wide-angle lenses are often used for horizontal shooting to show the atmosphere and visual impact. Vertical shooting can enhance the depth and layering of the picture, make the subject more three-dimensional, tall and upright, guide the line of sight through lines, and highlight the contrast between the foreground and background. When we shoot people, vertical shooting can better show the height of the person, shoot the peaks can better show the majesty of the peaks, increase the contrast between the foreground and background when shooting, and guide the line of sight through lines to highlight the depth of the picture, etc.

[0034] CN 111413838 A invented a conversion lens, which is assembled from a plurality of optical lenses in sequence and can convert a macro perspective into a wide-angle perspective. The conversion lens is composed of an objective lens, a relay lens and a focusing device, which are connected to each other in sequence. The focusing device is connected to a lens barrel for use, and the lens barrel is a part of a camera waterproof housing or is sealed with it. When used underwater, water may exist at any one or more connections. The components are all on an optical axis, and their optical properties are interrelated. The objective lens produces a reduced, inverted intermediate image with a wide-angle perspective, and the intermediate image is then transmitted through the relay lens and the focusing device and then projected to the camera sensor by a macro lens arranged in the waterproof lens barrel. The three independent components are all waterproof and can be disassembled and assembled underwater. The optical system also takes into account the optical properties of water, and its total length can be extended or shortened. The three independent components can be changed according to personal preferences. This invention provides a flexible underwater optical system, which can easily switch between macro and wide-angle perspectives underwater according to the photographer's shooting needs.

[0035] The optical axis of the above conversion lens is arranged horizontally, which is mainly suitable for horizontal shooting. Underwater photographers often need to find a suitable shooting angle, and sometimes need to compose and shoot close to the beach, which is extremely uncomfortable. Sometimes they cannot find a suitable shooting angle, making underwater shooting more difficult. In order to solve the above technical problems, this application provides the following technical solutions.

[0036] refer to Figure 1-8The present application provides an angle relay lens, which is used to replace the straight-through relay lens in the prior art solution or to provide a choice for the public. The angle relay lens includes a waterproof housing 100, an optical mechanism 200 and a locking mechanism 300. The waterproof housing 100 includes a front housing 110 and a rear housing 120. The front housing 110 has a first end 111 and a second end 112. The first end 111 is connected to the above-mentioned objective lens, which is used to obtain imaging light of the object to be photographed. The second end 112 is rotatably connected to the rear housing 120. The first end 111 has a first central axis A( Figure 3 The rear housing 120 has a second central axis B ( Figure 3 The first center axis A and the second center axis B are arranged at an acute angle or an obtuse angle, the side of the rear housing 120 away from the front housing 110 is connected to the above-mentioned focusing device, the front housing 110 and the rear housing 120 are enclosed to form an installation cavity, the optical mechanism 200 is arranged in the installation cavity, and is used to guide the imaging light obtained by the objective lens to the focusing device, and the locking mechanism 300 is arranged on the front housing 110 or the rear housing 120, and is used to lock the positions of the front housing 110 and the rear housing 120. The first center axis A and the second center axis B of the angle relay lens waterproof housing 100 are arranged at an acute angle or an obtuse angle, and the second end 112 of the front housing 110 and the rear housing 120 can rotate relative to each other, so that no matter when shooting horizontally or vertically, the first end 111 can be set at an upward shooting angle by rotating the front housing 110, so that the objective lens connected to the first end 111 can be composed and photographed by upward shooting, which is convenient for underwater framing and shooting, and improves the flexibility of underwater photography.

[0037] The present application creatively adopts the structural design of the angle relay lens, so that shooting can be performed through the upward shooting angle in either horizontal or vertical shooting, and the switching is convenient. The upward shooting angle can avoid the clutter of the background, highlight the subject, and can also take in more blue sea water, enhance the depth of space, improve the quality of the photos and better fit the beauty of underwater creatures. On the other hand, the operation process of finding and adjusting the angle during shooting is simplified. Since the second end 112 of the front shell 110 is rotatably connected with the rear shell 120, the first central axis A of the first end 111 of the front shell 110 and the second central axis B of the rear shell 120 are set at an acute angle or an obtuse angle, so that the first end 111 can be set at an upward shooting angle, so that the objective lens can shoot upward for framing and shooting. When switching between horizontal shooting and vertical shooting, the first end 111 and the objective lens can be kept at the upward shooting angle by the rotation of the front shell 110, which reduces the difficulty of finding the framing angle, reduces the difficulty of underwater shooting, improves the flexibility of underwater creature shooting operation, and facilitates the framing and shooting of underwater creatures.

[0038] The present application sets a locking mechanism 300 to lock the front shell 110 or the rear shell 120 after it is rotated into place, thereby achieving stability of the connection between the front shell 110 and the rear shell 120, especially achieving locking of the front shell 110 or the rear shell 120 in the circumferential direction.

[0039] Since the objective lens is arranged on the first end 111 of the front shell 110, in order to solve the problem of upward shooting of the objective lens, the present application rotates the front shell 110, which can conveniently convert the objective lens into an upward shooting perspective, and can quickly realize the upward shooting setting of the objective lens, thereby improving the flexibility of underwater photography. After the objective lens is rotated to the upward shooting perspective, it is locked using the locking mechanism 300, so that the objective lens is stable during the entire shooting process, thereby improving the shooting quality.

[0040] Furthermore, the central axis of the second end 112 of the front shell 110 is colinear with the second central axis B of the rear shell 120, and both are arranged horizontally. The front shell 110 also includes a middle section arranged between the first end 111 and the second end 112, and the central axis of the middle section is arranged at an acute angle or an obtuse angle with the first central axis A and the second central axis B. Therefore, when switching between horizontal and vertical shooting, when the front shell 110 is rotated as a whole relative to the rear shell 120, the objective lens can maintain an upward shooting perspective, which facilitates underwater shooting and framing.

[0041] The waterproof housing 100 is convenient for holding and carrying the entire relay lens, and can also protect the optical mechanism 200 inside it. Since the camera system is used for underwater shooting, the relay lens will come into contact with seawater, so its external waterproof housing 100 is made of waterproof material, and the front housing 110 is an integrally formed special-shaped structure.

[0042] refer to Figure 1 and Figure 3 The locking mechanism 300 is arranged on the front shell body 110, and a limiting groove 121 is provided on the rear shell body 120. The locking mechanism 300 includes a locking portion 3211. The locking mechanism 300 has a locked state and an unlocked state. In the locked state, the locking portion 3211 extends into the limiting groove 121 to limit the rotation of the front shell body 110. In the unlocked state, the locking portion 3211 exits the limiting groove 121, and the front shell body 110 can be rotated at any angle around the above-mentioned axis until the objective lens is in an upward shooting angle.

[0043] In one embodiment, the locking mechanism 300 can also be arranged on the rear shell body 120, and correspondingly, a limiting groove 121 is set on the front shell body 110. The limiting part of the locking mechanism 300 extends into or withdraws from the limiting groove 121 to realize the switching between the locked state and the unlocked state, which is convenient for the rotation of the objective lens and the front shell body 110, and the locking after rotation into place.

[0044] The locking mechanism 300 also includes a driving assembly 310 and a locking assembly 320. The locking portion 3211 is disposed on the locking assembly 320. The driving assembly 310 can drive the locking portion 3211 to extend into or withdraw from the limiting groove 121, so that the locking mechanism 300 switches between a locked state and an unlocked state.

[0045] In one embodiment, the driving assembly 310 can drive the locking assembly 320 to move along the axial direction of the front shell 110, so that the locking portion 3211 extends into or exits the limiting groove 121. The driving assembly 310 is a push rod structure, and the push rod is pushed by manpower to move, thereby driving the locking assembly 320 to move, thereby achieving the locking portion 3211 extending into, locking or exiting the limiting groove 121.

[0046] refer to Figure 5 In this embodiment, the driving assembly 310 includes a driving knob 311, a limiting pin 312, a rotating shaft 313 and an elastic member 314. The driving knob 311 can rotate around the rotating shaft 313. The driving knob 311 is provided with an arc-shaped movable groove 3111. The limiting pin 312 is penetrated in the arc-shaped movable groove 3111 to limit the rotation of the driving knob 311. The elastic member 314 is arranged on a side of the locking assembly 320 away from the driving knob 311. In the locked position, the driving knob 311 abuts against the locking assembly 320 to limit the movement of the locking assembly 320. The locking portion 3211 extends into the limiting groove 121. The elastic member 314 has an elastic restoring force that allows the locking portion 3211 to withdraw from the limiting groove 121; in the unlocked position, the driving knob 311 is separated from the locking assembly 320, the locking assembly 320 can be released, and the locking portion 3211 withdraws from the limiting groove 121.

[0047] It is understandable that machining errors are unavoidable during the machining process. The existence of such machining errors will affect the tightness of the connections of the assembled components, and may ultimately affect the realization of the functions of the assembled products.

[0048] refer to Figure 6In order to prevent the machining error from affecting the locking of the front housing 110, thereby affecting the stability of the objective lens and the imaging quality, the locking assembly 320 includes a locking block 321, a slider 322 and an elastic pressing piece 323. The elastic pressing piece 323 is arranged between the locking block 321 and the slider 322 along the second central axis B. When switching from the unlocked state to the locked state, the driving assembly 310 pushes the slider 322 along the second central axis B and moves toward the direction close to the elastic member 314 to compress the elastic member 314. At this time, the elastic pressing piece 323 between the locking block 321 and the slider 322 is compressed. Under the action of its elastic restoring force, the locking block 321 moves toward a direction closer to the elastic member 314, that is, the locking block 321 extends further into the limiting groove 121, so that the locking portion 3211 is in close contact with the limiting groove 121, and the driving knob 311 is in a locked state and abuts against the locking assembly 320 to lock the locking assembly 320.

[0049] In one embodiment, the limiting groove 121 has two opposite side walls 1211, a bottom wall 1212 and an opening 1213. The bottom wall 1212 is arranged at the same end of the two side walls 1211, and the opening 1213 is arranged on the opposite side of the bottom wall 1212. The locking portion 3211 can extend into or exit the limiting groove 121 from the opening 1213 so that the locking portion 3211 can switch between a locked state and an unlocked state. The driving assembly 310 drives the slider 322 to move in a direction from the opening 1213 to the bottom wall 1212, thereby pushing the locking block 321 to move in the same direction and synchronously until the locking portion 3211 contacts the bottom wall 1212.

[0050] In one embodiment, the elastic pressing piece 323 includes two butterfly springs, which are arranged face to face. The two butterfly springs are in contact with the slider 322 and the locking block 321 respectively. In the locked state, the two butterfly springs are compressed and deformed, and the free height becomes smaller. In order to restore the deformation, the butterfly springs generate elastic restoring forces, and the elastic restoring forces generate two opposite forces on the slider 322 and the locking block 321 respectively. In particular, since the driving component 310 limits the slider 322, the butterfly springs overcome the slider The force exerted by 322 on the locking block 321 can cause the locking block 321 to move toward the direction close to the bottom wall 1212, so that the locking portion 3211 can be in close contact with the bottom wall 1212, thereby eliminating the looseness caused by manufacturing or assembly errors, and making the front shell 110 and the rear shell 120 more stable after being locked. By selecting or presetting the size and strength of the elastic pressing piece 323, the locking force on the front shell 110 and the rear shell 120 can be kept consistent, which also makes the operation more comfortable and convenient.

[0051] Furthermore, a through hole is provided in the middle of the slider 322, forming a "mouth"-shaped structure, and the locking block 321 is movably arranged in the through hole, and the elastic pressing piece 323 is arranged between the inner wall of the slider 322 and the locking block 321. When the driving component 310 drives the slider 322 to move along the bottom wall 1212 close to the limiting groove 121, the locking block 321 is driven synchronously, and under the action of the elastic pressing piece 323, the locking portion 3211 of the locking block 321 is pressed against the bottom wall 1212, thereby realizing precise positioning between the front shell 110 and the rear shell 120 in the circumferential direction of the rear shell 120.

[0052] In order to better guide the movement of the locking assembly 320, make its movement more stable, and avoid the shaking during the movement process affecting the final imaging effect, the locking mechanism 300 also includes a guide member 330, which extends along the second central axis B. The locking assembly 320 is movably sleeved on the guide member 330, and the driving assembly 310 is arranged on one side of the guide member 330, which can drive the locking assembly 320 to move along the extension direction of the guide member 330. Specifically, the guide member 330 is a columnar structure, a rod structure, a pin or a pin extending along the axial direction of the front housing 110.

[0053] Since the switch between horizontal shooting and vertical shooting generally requires the camera waterproof housing to be rotated 90°, the entire conversion lens (including the angle relay lens) installed at the front end of the lens barrel is rotated 90°, and the objective lens is biased to the left or right side when it is looking up. Therefore, in order to adjust the objective lens so that it is in the upward shooting angle, after switching between horizontal shooting and vertical shooting, the front housing 110 connected to the objective lens needs to be rotated 90° in the opposite direction. Accordingly, two limiting grooves 121 are provided, and the limiting grooves 121 are arranged along the circumference of the rear housing 120. On the circumference of the rear housing 120, the angle between the two limiting grooves 121 is 90°.

[0054] It should be further explained that the reverse direction mentioned above refers to the direction of rotation of the entire turning relay lens when switching between horizontal and vertical shooting. If the turning relay lens rotates counterclockwise, the front shell 110 will be rotated clockwise to switch to the upward shooting perspective. If the turning relay lens rotates clockwise, the front shell 110 will be rotated counterclockwise to switch to the upward shooting perspective.

[0055] In order to better position the rotation accuracy of the front housing 110, a horizontal mark "H" and a vertical mark "V" are provided on the rear housing 120, and a reference mark "I" is provided on the front housing 110. When the horizontal mark is taken, "I" and "H" correspond to each other. Please refer to Figure 2 When switching to vertical shooting, the front housing 110 is rotated so that "I" and "V" correspond to each other. Figure 4 .

[0056] Of course, in other embodiments, the above-mentioned marks can also be marked and distinguished by other letters, numbers or other symbols. The marks on the front shell 110 and the rear shell 120 can also be exchanged according to usage habits or needs.

[0057] Furthermore, the above-mentioned marks “H” and “V” are respectively arranged to correspond to the positions of the two limit grooves 121 .

[0058] In order to improve the positioning accuracy when the front shell 110 and the rear shell 120 are connected, and to prevent the front shell 110 and the rear shell 120 from moving along the second central axis B after being connected, causing the two to slip, a first positioning frame 400 and a second positioning frame 500 are symmetrically provided on both sides of the front shell 110, and the first positioning frame 400 and the second positioning frame 500 extend along the second central axis B and extend to both sides of the rear shell 120. The locking mechanism 300 is arranged on the first positioning frame 400 and / or the second positioning frame 500, and the first positioning frame 400 and the second positioning frame 500 are provided with a first limiting member 410, and the rear shell 120 is provided with a second limiting member 122. The first limiting member 410 and the second limiting member 122 cooperate to limit the movement of the front shell 110 and the rear shell 120 along the second central axis B.

[0059] Of course, in other embodiments, the first positioning frame 400 and the second positioning frame 500 may also be symmetrically arranged on both sides of the rear shell 120. The first positioning frame 400 and the second positioning frame 500 extend along the second center axis B and extend to both sides of the rear shell 120. The first positioning frame 400 and the second positioning frame 500 facilitate positioning and fixing of the front shell 110 and the rear shell 120 along the second center axis B.

[0060] The locking mechanism 300 is arranged on the first positioning frame 400 and / or the second positioning frame 500, which means that when there is only one locking mechanism 300, it can be arranged on the first positioning frame 400 or the second positioning frame 500. In order to improve the connection stability, there can also be two locking mechanisms 300, which are respectively arranged on the first positioning frame 400 and the second positioning frame 500.

[0061] The first positioning frame 400 and the second positioning frame 500 are respectively fixed on the front housing 110 through a fixing member 700 and a pin 800. The fixing member 700 is a screw.

[0062] refer to Figure 7 and 8The locking mechanism 300 is arranged on the first positioning frame 400, and the first positioning frame 400 and the second positioning frame 500 are both provided with a first limiting member 410. The rear shell 120 is provided with a second limiting member 122. The first limiting member 410 and the second limiting member 122 cooperate to limit the movement of the front shell 110 and the rear shell 120 along the second central axis B. The rotating shaft 313 and the limiting nail 312 are arranged on the first positioning frame 400. The driving knob 311 can rotate around the rotating shaft 313. One end of the elastic member 314 contacts the first positioning frame 400, and the other end is sleeved on the guide member 330. After the driving assembly 310 releases the slider 322, the slider 322 and the locking block 321 move under the action of the elastic member 314, so that the locking portion 3211 withdraws from the locking groove from the opening 1213. At this time, the front shell 110 can be freely rotated.

[0063] One of the first limiting member 410 and the second limiting member 122 is an annular groove, and the other is an arc-shaped protrusion, which is clamped in the annular groove, thereby preventing the front shell 110 and the rear shell 120 from moving relative to each other along the second center axis B, thereby improving the stability of the axial connection (in the direction of the second center axis B) between the front shell 110 and the rear shell 120.

[0064] In order to improve the stability of the connection, the arc-shaped protrusions are provided in plurality, and the plurality of arc-shaped protrusions are connected end to end around the circumference of the front shell 110 or the rear shell 120 to form an annular protrusion, or can be arranged at intervals along the circumference of the front shell 110 or the rear shell 120.

[0065] A third limiting member 510 is provided on the first positioning frame 400 and / or the second positioning frame 500, and a fourth limiting member 123 is provided on the rear shell 120. One of the third limiting member 510 and the fourth limiting member 123 is an arc groove, and the other is a limiting block. The limiting block can be movably arranged in the arc groove to limit the rotation position of the front shell 110 and the rear shell 120, and provide a guiding effect on the rotation of the front shell 110 and the rear shell 120, so that the two are more stable when they rotate relative to each other.

[0066] Similarly, the first positioning frame 400 and / or the second positioning frame 500 mentioned above are provided with a third stopper 510, and one third stopper 510 is provided, which is provided on the first positioning frame 400 or the second positioning frame 500, or two third stoppers 510 are provided, which are provided on the first positioning frame 400 and the second positioning frame 500, respectively, and two fourth stoppers 123 are provided accordingly. Figure 8The third limit member 510 is arranged on the second positioning frame 500, and the arc groove arranged thereon cooperates with the limit block on the rear shell 120. The limit block can move in the arc groove. The angle (or arc length) of the arc groove limits the movement stroke of the limit block. The two ends of the arc groove are the two extreme positions of the movement of the limit block. The range between the two extreme positions is the movement stroke, so that the front shell 110 and the rear shell 120 can only rotate relative to each other within this movement stroke.

[0067] Based on the upward shooting requirements of underwater photography, after switching between horizontal and vertical shooting, the relative rotation angle of the front shell 110 and the rear shell 120 is 90°. Setting the working angle of the arc groove to 90° can further limit the relative rotation range of the front shell 110 and the rear shell 120 to 90°.

[0068] Furthermore, the first positioning frame 400 and the second positioning frame 500 both have a first side surface 420 and a second side surface 430 , the first side surface 420 contacts the rear shell 120 , and the second side surface contacts the front shell 110 ; the first limiting member 410 and the third limiting member 510 are both arranged on the first side surface 420 .

[0069] Based on the needs of underwater use, water or seawater may exist in any structure or connection of the entire turning relay lens. In order to prevent seawater aggregation and crystallization from affecting the normal use of the relay lens, a plurality of drainage grooves 600 are provided at the connection between the front shell 110 and the rear shell 120. The drainage grooves 600 include a first drainage groove 610, a second drainage groove 620 and a third drainage groove 630. The first drainage groove 610 is provided on the first side surface 420 of the first positioning frame 400 and the second positioning frame 500. The plurality of first drainage grooves 610 respectively penetrate the first positioning frame 400 and the second positioning frame 500 along the direction of the second central axis. The frame 500 is provided, a plurality of second drainage grooves are provided on the second side surface 430, the second drainage grooves 620 and the first drainage grooves 610 are connected, a plurality of third drainage grooves 630 are provided on the rear shell body 120, and the plurality of third drainage grooves 630 are evenly arranged around the rear shell body 120, and the third drainage grooves 630 extend along the direction of the second central axis B. The arrangement of the drainage grooves 600 allows seawater to flow freely, or when flushed with fresh water after use, it can take away fine sand that may exist in the seawater and particles after crystallization of seawater, thereby preventing the front shell body 110 or the rear shell body 120 from getting stuck or not smoothly during rotation.

[0070] In order to improve the stability of the axial connection between the front shell 110 and the rear shell 120, a plurality of arc-shaped protrusions are provided on the first positioning frame 400, and the plurality of arc-shaped protrusions are arranged at intervals along the circumference of the front shell 110. The first drainage groove 610 is arranged through the first positioning frame 400 along the direction of the second center axis B. The first drainage groove 610 is arranged between two adjacent arc-shaped protrusions, which neither affects the realization of the connection function nor the realization of the drainage function.

[0071] refer to Figure 3 The optical mechanism 200 includes a front lens assembly 210, a reflection assembly 220 and a rear lens assembly 230. The reflection assembly 220 is disposed between the front lens assembly 210 and the rear lens assembly 230. The reflection assembly 220 can reflect the first imaging light emitted from the front lens assembly 210 to form a second imaging light, and emit it to the rear lens assembly 230. The first imaging light has a first imaging optical axis A, and the second imaging light has a second imaging optical axis B. The first imaging optical axis A and the second imaging optical axis B are arranged at an acute angle or an obtuse angle θ. The geometric angle θ is also the angle between the first central axis A and the second central axis B, preferably an acute angle. Furthermore, the value of θ is 45°.

[0072] In one embodiment, the reflective assembly 220 includes a right-angled triangular prism 221 and a trapezoidal prism 222. The right-angled triangular prism 221 is arranged near the front lens assembly 210. The right-angled triangular prism 221 includes two right-angled sides a1 and a2, and a hypotenuse c. The trapezoidal prism 222 includes waists b1 and b2, and bases d1 and d2, wherein b1 and a2 are connected, so that the right-angled triangular prism 221 and the trapezoidal prism 222 are connected as an integral structure. The first imaging light is incident on a1, reflected to a2 through c, and then incident from b1 to d1 of the trapezoidal prism 222, reflected to b2 through d1, and emitted from b2 to form a second imaging light, and then emitted to the rear lens assembly 230, and finally imaged on the camera sensor after passing through the focusing device and the macro lens in the lens barrel in sequence.

[0073] Of course, in other embodiments, the reflective component 220 can also be an integrated structure with the same shape formed by the combination of the right-angled triangular prism 221 and the trapezoidal prism 222, and the reflection of the imaging light is achieved by using the same shape as the right-angled triangular prism 221 and the trapezoidal prism 222, so that the imaging light is emitted at an exit angle different from the incident angle, so that the first imaging optical axis and the second imaging optical axis are set at an acute angle or an obtuse angle.

[0074] The front lens assembly 210 and the rear lens assembly 230 each include a plurality of positive lenses, negative lenses and cemented lenses, and the front lens assembly 210 and the reflection assembly 220 are arranged in the front shell 110 and are sealedly connected to the front shell 110. The optical axis of the front lens assembly 210 is parallel to the central axis A of the first end 111 of the front shell 110. The rear lens assembly 230 is arranged in the rear shell 120 assembly and is sealedly connected to the rear shell 120. The optical axis of the rear lens assembly 230 is parallel to the second central axis B. The arrangement of the front lens assembly 210 and the rear lens assembly can realize the steering transmission of the imaging light and eliminate the underwater optical chromatic aberration.

[0075] The above specific examples are used to illustrate the present application, which is only used to help understand the present application and is not intended to limit the present application. For technicians in the technical field to which the present application belongs, they can also make some simple deductions, deformations or substitutions based on the ideas of the present application.

Claims

1. A corner relay lens, characterized in that: include: A waterproof housing, the waterproof housing comprising a front housing and a rear housing, the front housing having a first end and a second end, the first end being connected to an objective lens, the objective lens being used to obtain imaging light of an object to be photographed, the second end being rotatably connected to the rear housing, the first end having a first central axis, the rear housing having a second central axis, the first central axis and the second central axis being arranged at an acute angle or an obtuse angle, the rear housing being connected to a focusing device, and the front housing and the rear housing enclosingly forming a mounting cavity; An optical mechanism, which is disposed in the mounting cavity and is used to guide the imaging light acquired by the objective lens to the focusing device; And a locking mechanism, which is arranged on the front shell or the rear shell and is used to lock the positions of the front shell and the rear shell.

2. The angle relay lens according to claim 1, characterized in that: The locking mechanism is arranged on the front shell, and a limiting groove is provided on the rear shell. The locking mechanism includes a locking portion. The locking mechanism has a locked state and an unlocked state. In the locked state, the locking portion extends into the limiting groove, and in the unlocked state, the locking portion withdraws from the limiting groove.

3. The angle relay lens according to claim 2, characterized in that: The locking mechanism also includes a driving component and a locking component. The locking portion is arranged on the locking component. The driving component can drive the locking component to extend into or withdraw from the limiting groove, so that the locking mechanism switches between the locked state and the unlocked state.

4. The angle relay lens according to claim 3, characterized in that: The driving assembly includes a driving knob, a limiting pin, a rotating shaft and an elastic member. The driving knob can rotate around the rotating shaft. The driving knob is provided with an arc-shaped movable groove. The limiting pin is inserted into the arc-shaped movable groove to limit the rotation of the driving knob. The elastic member is arranged on a side of the locking assembly away from the driving knob. In the locked state, the driving knob abuts against the locking assembly to limit the movement of the locking assembly. The locking portion extends into the limiting groove, and the elastic member has an elastic restoring force that causes the locking portion to withdraw from the limiting groove. In the unlocked state, the driving knob is separated from the locking assembly to release the locking assembly, and the locking portion withdraws from the limiting groove.

5. The angle relay lens according to claim 4, characterized in that: The locking assembly includes a locking block, a slider and an elastic pressure plate. The locking portion is arranged on the locking block, and the elastic pressure plate is arranged between the locking block and the slider along the direction of the second center axis. In the locked state, the elastic pressure plate is in a compressed state, and its elastic restoring force makes the locking portion in close contact with the limiting groove.

6. The angle relay lens according to any one of claims 3 to 5, characterized in that: The locking mechanism also includes a guide member, which extends in the direction of the second center axis. The locking assembly is movably mounted on the guide member. The driving assembly is arranged on one side of the guide member and can drive the locking assembly to move along the extension direction of the guide member.

7. The angle relay lens according to claim 2, characterized in that: There are two limiting grooves, and the limiting grooves are arranged along the circumference of the rear shell body. On the circumference of the rear shell body, the angle between the two limiting grooves is 90°.

8. The angle relay lens according to claim 1, wherein: A first positioning frame and a second positioning frame are symmetrically provided on both sides of the front housing, the first positioning frame and the second positioning frame extend in the direction of the second central axis and extend to both sides of the rear housing, the locking mechanism is provided on the first positioning frame and / or the second positioning frame, a first limiting member is provided on the first positioning frame and the second positioning frame, and a second limiting member is provided on the rear housing, the first limiting member and the second limiting member cooperate to limit the movement of the front housing and the rear housing in the direction of the second central axis; One of the first limiting member and the second limiting member is an annular groove, and the other is an arc-shaped protrusion, and the arc-shaped protrusion is clamped in the annular groove; A third limiting member is provided on the first positioning frame and / or the second positioning frame, and a fourth limiting member is provided on the rear shell body. One of the three limiting members and the fourth limiting member is an arc groove, and the other is a limiting block. The limiting block can be movably arranged in the arc groove to limit the rotation stroke of the front shell body and the rear shell body. The angle of the arc groove is 90°.

9. The angle relay lens according to claim 8, characterized in that: The first positioning frame and the second positioning frame each have a first side surface and a second side surface, the first side surface contacts the rear housing, and the second side surface contacts the front housing; a plurality of first drainage grooves are provided on the first side surface, and a plurality of second drainage grooves are provided on the second side surface, and the plurality of first drainage grooves respectively penetrate the first positioning frame and the second positioning frame along the direction of the second central axis and are connected to the second drainage grooves; The rear shell is provided with a plurality of third drainage grooves, the plurality of third drainage grooves are evenly arranged around the rear shell, and the third drainage grooves extend along the direction of the second central axis.

10. The angle relay lens according to claim 1, characterized in that: The optical mechanism includes a front lens assembly, a reflection assembly and a rear lens assembly, wherein the reflection assembly is disposed between the front lens assembly and the rear lens assembly, and the reflection assembly can reflect a first imaging light emitted from the front lens assembly to form a second imaging light, and emit the second imaging light to the rear lens assembly, wherein the first imaging light has a first imaging optical axis, and the second imaging light has a second imaging optical axis, and the first imaging optical axis and the second imaging optical axis are arranged at an acute angle or an obtuse angle.

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