Lens group capable of generating distortion imaging, optical path structure and projector

Abstract

The utility model discloses a lens group capable of generating distortion imaging, an optical path structure and a projector, the lens group comprises a projection lens group and a distortion lens group, and the projection lens group and the distortion lens group are coaxially arranged; the distortion lens group comprises a plano-convex lens and a biconcave lens, the plano-convex lens is arranged on one side close to the projection lens group, and the biconcave lens is arranged on one side far away from the projection lens group; one surface, facing the projection lens group, of the plano-convex lens is a convex surface, and one surface far away from the projection lens group is a plane; and two surfaces of the biconcave lens are concave surfaces. According to the lens group, the optical path structure with the lens group and the projector, an imaging picture projected by the projection lens group further passes through the plano-convex lens and the biconcave mirror of the distortion lens group in sequence, so that the imaging picture is distorted, and the distorted imaging picture is not only amplified, but also is also amplified. And the edge of the amplified imaging picture is fuzzified, so that the aesthetic feeling of the imaging picture can be improved, and the viewing experience is improved.

Description

TECHNICAL FIELD

[0001] The utility model relates to a projection equipment technical field, concretely relates to a lens group, light path structure and projector of producing distortion imaging. BACKGROUND

[0002] The imaging picture projected on the carrier (wall surface, curtain cloth etc.) of the existing projector is usually small, such as the size of 16:9 rectangle, and has very clear picture edge, has very strong boundary sense. SUMMARY

[0003] In view of the deficiency of prior art, the utility model aims at providing a lens group, light path structure and projector of producing distortion imaging.

[0004] In order to realize above-mentioned purpose, the utility model adopts following technical scheme:

[0005] A lens group of producing distortion imaging, including projection lens group and distortion lens group, the projection lens group and distortion lens group coaxial arrangement, the distortion lens group includes plano-convex lens and double concave lens, the plano-convex lens is located in the side close to projection lens group, the double concave lens is located in the side away from projection lens group, the one side of plano-convex lens towards projection lens group is convex, and the one side away from projection lens group is plane, the two sides of double concave lens are all concave.

[0006] Further, the total thickness of plano-convex lens is 6.2-10.2mm, wherein the diameter of convex surface is 30mm, and the distance between the optical center of plano-convex lens and the center of convex surface is 7.5mm, in the double concave lens, the diameter of the concave surface towards plano-convex lens is 26mm, and the depth is 5.3mm, the diameter of the concave surface away from plano-convex lens is 35mm, and the depth is 2.6mm, the distance between the center of the concave surface towards plano-convex lens and the center of the concave surface away from plano-convex lens is 2.5mm, and the distance between the center of the concave surface towards plano-convex lens of double concave lens and the optical center of plano-convex lens is 13.7-19.7mm.

[0007] Further, the projection lens group includes plano-convex lens one, plano-concave lens and plano-convex lens two, the convex surface of plano-convex lens one is towards light source, the concave surface of plano-concave lens is towards the plane of plano-convex lens one, and the convex surface of plano-convex lens two is towards the convex surface of plano-convex lens in distortion lens group.

[0008] The utility model discloses still provide a kind of optical path structure, including light source, light cup, fish mirror one, display screen and fish mirror two which are coaxially arranged in order along light emission direction, it is characterized by further including above-mentioned lens group of producing distortion imaging;The lens group of producing distortion imaging is coaxially arranged with fish mirror two;In the lens group, the projection lens group is towards the fish mirror two;The light source is located in one end of the light cup, and the fish mirror one is located in the other end of light cup.

[0009] Further, heat insulation glass is further provided between the fish mirror one and the display screen;The light source is connected with a cooling fin.

[0010] Further, the distance between the center of the convex surface of the plano-convex lens one in the projection lens group and the side of the fish mirror two facing the projection lens group is 33.6-39.6 mm.

[0011] The utility model discloses still provide a kind of projector, including shell and above-mentioned optical path structure, and the optical path structure is located in the shell;The front end of the shell is provided with fixed lens barrel and movable lens barrel, and fixed lens barrel is located in the front of movable lens barrel;The distortion lens group is fixedly installed in the fixed lens barrel, and the projection lens group is fixedly installed in the movable lens barrel, and the movable lens barrel can move forwards and backwards;There is always a distance between the distortion lens group and the projection lens group.

[0012] Further, the movable lens barrel is sleeved with a focusing wheel outside thread, the outer surface of the movable lens barrel is provided with external thread, and the inner surface of the focusing wheel is provided with internal thread matched with the external thread;The front end of the shell is provided with two opposite focusing wheel extension holes, and the two sides of the focusing wheel are respectively extended outside the shell through the focusing wheel extension hole of corresponding position;The front end of the focusing wheel is provided with a limiting structure, when the movable lens barrel moves to the position of limiting structure, the front end of movable lens barrel abuts against the limiting structure, and at this time, there is still a distance between the projection lens group and the distortion lens group.

[0013] Further, the front end of the shell is provided with clamping groove matched with the fixed lens barrel, and the fixed lens barrel is clamped and fixed in the clamping groove;The outer surface of the fixed lens barrel is provided with positioning column, and the front end of the shell is provided with positioning hole in corresponding position, and the positioning column is inserted into the positioning hole.

[0014] Further, the rear end of the shell is provided with air outlet, and the top and bottom of the rear part of the shell are respectively provided with air inlet and cooling fan, the air inlet includes air inlet one and air inlet two, and the air inlet two corresponds to the position of light cup.

[0015] The utility model discloses a beneficial effect lies in: the utility model discloses the lens group and the light path structure, the projector that has this lens group, the imaging picture that the projection lens group projects further sequentially passes through the flat convex lens and double concave mirror of distortion lens group, and the picture size can be enlarged while the picture edge will produce the curve type distortion, and the picture boundary of distortion is blurred, and the boundary feeling basically disappears, can produce the feeling of starry sky or night sky in the dark environment, more beautiful, can promote the viewing experience. BRIEF DESCRIPTION OF DRAWINGS

[0016] Figure 1 It is the structure schematic drawing of the lens group of producing distortion imaging in the utility model embodiment 1.

[0017] Figure 2 It is the structure schematic drawing of the light path structure in the utility model embodiment 2.

[0018] Figure 3 It is the exploded structure schematic drawing of the projector in the utility model embodiment 3.

[0019] Figure 4 It is the installation schematic drawing of fixed lens barrel and movable lens barrel in the shell body in the utility model embodiment 3. DETAILED DESCRIPTION

[0020] The utility model will be further described below in conjunction with the drawings, and it is to be explained that the embodiment is the prerequisite of the technical scheme, and detailed implementation mode and specific operation process are given, but the protection scope of the utility model is not limited to the embodiment.

[0021] Embodiment 1

[0022] The embodiment provides a kind of lens group of producing distortion imaging, as shown in Figure 1 It includes projection lens group 100 and distortion lens group 200, and projection lens group 100 and distortion lens group 200 are coaxially arranged;The distortion lens group includes flat convex lens 1 and double concave lens 2, and flat convex lens 1 is arranged on the side close to projection lens group 100, and double concave lens 2 is arranged on the side away from projection lens group 100;The one side of flat convex lens 1 towards projection lens group 100 is convex, and the one side away from projection lens group 100 is flat;The two sides of double concave lens 2 are all concave.

[0023] In the embodiment, the total thickness of the plano-convex lens 1 is 8.2 mm, wherein the diameter of the convex surface is 30 mm, and the distance between the optical center of the plano-convex lens 1 and the center of the convex surface is 7.5 mm; in the biconcave lens 2, the diameter of the concave surface facing the plano-convex lens 1 is 26 mm, and the depth is 5.3 mm, the diameter of the concave surface away from the plano-convex lens 1 is 35 mm, and the depth is 2.6 mm, the distance between the center of the concave surface facing the plano-convex lens 1 and the center of the concave surface away from the plano-convex lens 1 is 2.5 mm; the distance between the center of the concave surface of the biconcave lens 2 facing the plano-convex lens 1 and the optical center of the plano-convex lens 1 is 16.7 mm.

[0024] More specifically, the total thickness of the biconcave lens 2 is 10.4 mm. It should be noted that the total thickness of the biconcave lens 2 can be between 8.4 mm and 12.4 mm.

[0025] In the embodiment, the projection lens group 100 includes a plano-convex lens one 3, a plano-concave lens 4, and a plano-convex lens two 5, the convex surface of the plano-convex lens one 3 faces the light source, the concave surface of the plano-concave lens 4 faces the plane of the plano-convex lens one 3, and the convex surface of the plano-convex lens two 5 faces the convex surface of the plano-convex lens 1 in the distortion lens group 200.

[0026] In the above lens group structure, the imaging picture projected by the projection lens group further passes through the plano-convex lens and the biconcave lens of the distortion lens group in sequence. The picture size can be enlarged, at the same time, the picture edge will produce a curved distortion, the picture boundary after distortion is blurred, and the boundary feeling basically disappears, which can produce the feeling of starry sky or night sky in a dark environment.

[0027] Embodiment 2

[0028] The embodiment provides an optical path structure, as shown in the figure, which includes a light source 6, a light cup 7, a mirror one 8, a display screen 9, a mirror two 10, and the lens group in the embodiment 1, which are coaxially arranged in sequence along the light exit direction; in the lens group, the projection lens group 100 faces the mirror two 10; the light source 6 is arranged at one end of the light cup 7, and the mirror one 8 is arranged at the other end of the light cup 7. Figure 2 In the embodiment, a heat insulation glass 11 is further arranged between the mirror one 8 and the display screen 9.

[0029] Further, in the embodiment, the distance between the center of the convex surface of the plano-convex lens one 3 in the projection lens group 100 and one side of the mirror two 10 facing the projection lens group 100 is 36.6 mm.

[0030] In the embodiment, the light source 6 is connected with a heat sink 12.

[0031]

[0032] ​Through the above optical path structure, the light emitted by the light source passes sequentially through the light cup 7, the first Fresnel lens 8, the display screen 9, the second Fresnel lens 10, the projection lens group 100, and the distortion lens group 200 before being projected onto the carrier to obtain an image.

[0033] Example 3

[0034] This embodiment provides a projector, such as Figures 3-4 As shown, the projector includes a housing 13 and the optical path structure described in Embodiment 2, with the optical path structure housed within the housing 13. A fixed lens barrel 14 and a movable lens barrel 15 are disposed inside the front end of the housing 13, with the fixed lens barrel 14 positioned in front of the movable lens barrel 15. The distortion lens group 200 is fixedly installed within the fixed lens barrel 14, and the projection lens group 100 is fixedly installed within the movable lens barrel 15, which can move back and forth. A distance is always maintained between the distortion lens group 200 and the projection lens group 100. In the projector described above, the distortion lens group is fixedly mounted on the housing via the fixed lens barrel 14, and its position remains unchanged, while the projection lens group can be moved back and forth via the movable lens barrel to adjust its focus.

[0035] In this embodiment, the movable lens barrel 15 is externally threaded with a focusing wheel 16. The outer surface of the movable lens barrel 15 is provided with an external thread, and the inner surface of the focusing wheel 16 is provided with an internal thread that matches the external thread. The front end of the outer casing 13 is provided with two opposing focusing wheel protrusion holes 17. The two sides of the focusing wheel 16 extend out of the outer casing 13 through the corresponding focusing wheel protrusion holes 17. With the above structure, when the focusing wheel 16 is rotated, it cannot move back and forth because it is limited by the focusing wheel protrusion holes 17. Therefore, the movable lens barrel 15 is driven to move back and forth, which can drive the projection lens assembly to move back and forth to adjust the focal length.

[0036] More specifically, in this embodiment, the front end of the focusing wheel 16 is provided with a limiting structure 18. When the movable lens barrel 15 moves to the position of the limiting structure 18, the front end of the movable lens barrel 15 abuts against the limiting structure 18, and at this time there is still a distance between the projection lens group 100 and the distortion lens group 200.

[0037] In this embodiment, the front end of the outer shell 13 is provided with a slot 19 that matches the fixed lens barrel 14, and the fixed lens barrel 14 is snapped and fixed in the slot 19.

[0038] Furthermore, in this embodiment, the outer surface of the fixed lens barrel 14 is provided with a positioning post 20, and the front end of the outer shell 13 is provided with a positioning hole, and the positioning post 20 is inserted into the positioning hole.

[0039] Through the structure of the clamping groove and the positioning column and the positioning hole, the fixed lens barrel can be fixed together with the distortion lens group at the front end of the outer shell, so as to avoid the change of the distortion effect caused by the movement of the distortion lens group.

[0040] In the embodiment, the rear end of the outer shell 13 is provided with an air outlet, and the top and bottom of the rear part of the outer shell 13 are respectively provided with an air inlet and a cooling fan 21, the air inlet includes an air inlet one 22 and an air inlet two 23, the air inlet one 22 corresponds to the position between the heat insulation glass 11 and the filter two 10, and the air inlet two 22 corresponds to the position of the light cup 7. Specifically, the air inlet two 23 includes a plurality of air inlet through holes.

[0041] By arranging the air inlet two on the top of the outer shell, the wind enters the air inlet through holes of the air inlet two from above and surrounds the light cup, and then enters the cooling fan from below the light cup, so that the hot air is finally sucked away by the cooling fan below, which can greatly remove the heat of the light cup and the light source, thereby greatly improving the heat dissipation effect.

[0042] Specifically, in the fixed lens barrel, the plano-convex lens 1 and the double-concave lens 2 are separated by a spacer one 24; in the movable lens barrel, the plano-convex lens one 3 and the plano-concave lens are separated by a spacer two 25, and the plano-concave lens 4 and the plano-convex lens two 5 are separated by a spacer three 26. The display screen 9 is fixed to the outer shell 13 through a screen frame 27, and the focusing wheel 17 is fixed to the outer shell 13 through a support 28; the front end of the fixed lens barrel 14 is provided with a lock cover 29, and the front end of the movable lens barrel 15 is provided with a lens cover 30; the rear end of the outer shell 13 is further provided with a light shield plate 31.

[0043] For those skilled in the art, various corresponding changes and modifications can be given according to the above technical solutions and concepts, and all these changes and modifications should be included in the protection scope of the utility model claim.

Claims

1. A lens group for producing a distorted image, characterized by comprising: The projection lens group and the distortion lens group are coaxially arranged; the distortion lens group comprises a plano-convex lens and a double-concave lens, the plano-convex lens is arranged on the side close to the projection lens group, and the double-concave lens is arranged on the side away from the projection lens group; one side of the plano-convex lens facing the projection lens group is a convex surface, and the other side away from the projection lens group is a plane; both sides of the double-concave lens are concave surfaces.

2. The lens group for producing a distorted image according to claim 1, wherein, The total thickness of the plano-convex lens is 6.2-10.2mm, wherein the diameter of the convex surface is 30mm, and the distance between the optical center of the plano-convex lens and the center of the convex surface is 7.5mm; in the double-concave lens, the diameter of the concave surface facing the plano-convex lens is 26mm, and the depth is 5.3mm, the diameter of the concave surface away from the plano-convex lens is 35mm, and the depth is 2.6mm, the distance between the center of the concave surface facing the plano-convex lens and the center of the concave surface away from the plano-convex lens is 2.5mm; the distance between the center of the concave surface of the double-concave lens facing the plano-convex lens and the optical center of the plano-convex lens is 13.7-19.7mm.

3. The lens group for producing a distorted image according to claim 1, wherein The projection lens group comprises a plano-convex lens one, a plano-concave lens and a plano-convex lens two, the convex surface of the plano-convex lens one faces the light source, the concave surface of the plano-concave lens faces the plane of the plano-convex lens one, and the convex surface of the plano-convex lens two faces the convex surface of the plano-convex lens in the distortion lens group.

4. An optical path structure comprising, in order along the light exit direction, a light source, a light cup, a field lens one, a display screen and a field lens two, characterized in that, Also comprising the lens group for generating distorted images according to any one of claims 1-3; the lens group for generating distorted images is coaxially arranged with the field lens two; in the lens group, the projection lens group faces the field lens two; the light source is arranged at one end of the light cup, and the field lens one is arranged at the other end of the light cup.

5. The optical path structure according to claim 4, characterized in that, Heat insulation glass is further arranged between the field lens one and the display screen; the light source is connected with a heat sink.

6. The optical path structure according to claim 4, characterized by The distance between the center of the convex surface of the plano-convex lens one in the projection lens group and one side of the field lens two facing the projection lens group is 33.6-39.6mm.

7. A projector characterized by comprising: The light path structure according to any one of claims 4-6 is arranged in the outer shell; the inner front end of the outer shell is provided with a fixed lens barrel and a movable lens barrel, the fixed lens barrel is arranged in front of the movable lens barrel; the distortion lens group is fixedly installed in the fixed lens barrel, the projection lens group is fixedly installed in the movable lens barrel, and the movable lens barrel can move forward and backward; there is always a distance between the distortion lens group and the projection lens group.

8. The projector of claim 7, wherein, An adjusting wheel is sleeved with an external thread on the outer part of the movable lens barrel, the outer surface of the movable lens barrel is provided with an external thread, and the inner surface of the adjusting wheel is provided with an internal thread matched with the external thread; the front end of the outer shell is provided with two opposite adjusting wheel extension holes, the two sides of the adjusting wheel respectively extend out of the outer shell through the corresponding adjusting wheel extension holes; the front end of the adjusting wheel is provided with a limiting structure, when the movable lens barrel moves to the position of the limiting structure, the front end of the movable lens barrel abuts against the limiting structure, and at this time, there is still a distance between the projection lens group and the distortion lens group.

9. The projector of claim 7, wherein, The front end of the outer shell is internally provided with a clamping groove matched with the fixed lens barrel, and the fixed lens barrel is clamped and fixed in the clamping groove; the outer surface of the fixed lens barrel is provided with a positioning column, and the corresponding position of the front end of the outer shell is provided with a positioning hole, and the positioning column is inserted into the positioning hole.

10. The projector of claim 7, wherein, The rear end of the outer shell is provided with an air outlet, and the top and bottom of the rear part of the outer shell are respectively provided with an air inlet and a cooling fan, and the air inlet includes an air inlet one and an air inlet two, and the air inlet two corresponds to the position of the light cup.

Images