Long-focus reflecting prism, periscope head and electronic equipment

Abstract

The utility model discloses a long-focus reflecting prism, a periscope head and electronic equipment. The long-focus reflecting prism comprises an incident plane, an emergent plane, a first reflecting plane, a second reflecting plane and at least one middle reflecting plane, light passing through the lens group vertically enters the reflecting prism from the incident plane, is sequentially reflected by the first reflecting plane, the middle reflecting plane and the second reflecting plane, and is vertically emitted to an imaging plane from the emergent plane; the first reflecting surface, the second reflecting surface and each middle reflecting surface only reflect the light once; and the incident plane and the emergent plane are parallel and are positioned on different sides of the reflecting prism. According to the periscope lens module, the plurality of reflecting surfaces are arranged in the reflecting prism, so that light rays are reflected for multiple times along the plurality of reflecting surfaces after entering the reflecting prism, the light path is prolonged, and the focal length of the periscope lens module can be increased.

Description

TECHNICAL FIELD

[0001] The utility model relates to periscope lens technical field, especially long focus reflection prism. BACKGROUND

[0002] With the frequency of electronic equipment long focus lens in daily use is higher and higher, the technology development and promotion of major electronic equipment manufacturers on long focus camera are more and more diversified, and the requirement of lens focal length is also higher and higher, ordinary long focus camera is relatively short in focal length design due to size limitation, that is, the zoom ratio cannot be very high in the process of matching main camera, and the equivalent focal length ratio of long focus camera and main camera is about 3-6 times, therefore, how to greatly improve the focal length design of periscope long focus camera under the condition of small size change becomes urgent, and how to have the level of long focus shooting beyond peers on flagship electronic equipment also becomes a big selling point of electronic equipment.

[0003] In today's periscope camera products, there are two common periscope camera design schemes, the first one is to place a triangular prism in front of the lens group, so that the light path is deflected from the triangular prism, and then the lens group can be placed horizontally along the direction parallel to the plane of the electronic device, and the CMOS chip can be placed vertically behind the lens group, and the OIS function is realized by the swing of the triangular prism, and the focusing function is realized by the movement of the lens group.

[0004] However, the long focus length of the first scheme cannot be very large under the limitation of the limited size of the electronic device, and in the second scheme, the lens group needs to be placed along the direction perpendicular to the plane of the electronic device because the lens group directly receives light from the object side, which leads to the increase of the height of the lens group while improving the focal length, that is, the thickness of the electronic device will be affected, and good hand feeling and experience cannot be achieved. UTILITY MODEL CONTENTS

[0005] In view of the above-mentioned deficiencies of the prior art, the technical problem to be solved by the utility model is to provide a long focus reflection prism, by setting multiple reflection surfaces in the reflection prism, the light is reflected multiple times along the multiple reflection surfaces after entering the reflection prism, thereby prolonging the light path and increasing the focal length of the periscope lens module.

[0006] One technical scheme adopted by the utility model is to provide a long focus reflection prism, which comprises an incident surface, an exit surface, a first reflection surface, a second reflection surface and at least one intermediate reflection surface.

[0007] The light rays passing through the lens group enter the reflecting prism perpendicularly from the incident surface, are reflected by the first reflecting surface, the intermediate reflecting surface and the second reflecting surface in turn, and exit perpendicularly from the exit surface to the imaging surface;

[0008] The first reflecting surface, the second reflecting surface and each intermediate reflecting surface reflect the light rays only once.

[0009] The incident surface and the exit surface are parallel and located on different sides of the reflecting prism.

[0010] Further, the incident surface is adjacent to the first reflecting surface, and the included angle between them is an acute angle; the exit surface is adjacent to the second reflecting surface, and the included angle between them is an acute angle.

[0011] Further, the intermediate reflecting surface includes a first intermediate reflecting surface and a second intermediate reflecting surface; the first intermediate reflecting surface is adjacent to the incident surface, and the included angle between them is an obtuse angle; the second intermediate reflecting surface is adjacent to the exit surface, and the included angle between them is an obtuse angle; the first reflecting surface and the second reflecting surface are adjacent, and the included angle between them is a right angle.

[0012] Further, the first intermediate reflecting surface is parallel to the first reflecting surface, and the second intermediate reflecting surface is parallel to the second reflecting surface; a first light shielding surface is adjacent between the first intermediate reflecting surface and the second intermediate reflecting surface, and the first light shielding surface is coated with a light shielding material.

[0013] Further, the intermediate reflecting surface includes a third intermediate reflecting surface, a fourth intermediate reflecting surface, a fifth intermediate reflecting surface and a sixth intermediate reflecting surface; the third intermediate reflecting surface is adjacent to the incident surface, and the included angle between them is an obtuse angle; the fourth intermediate reflecting surface is adjacent to the second reflecting surface, and the included angle between them is a right angle; the fifth intermediate reflecting surface is adjacent to the first reflecting surface, and the included angle between them is a right angle; the sixth intermediate reflecting surface is adjacent to the exit surface, and the included angle between them is an obtuse angle.

[0014] Further, the third intermediate reflecting surface is parallel to the first reflecting surface; the fourth intermediate reflecting surface is parallel to the fifth intermediate reflecting surface; the sixth intermediate reflecting surface is parallel to the second reflecting surface; the second light shielding surface and the third light shielding surface are respectively adjacent between the third intermediate reflecting surface and the fourth intermediate reflecting surface, and between the fifth intermediate reflecting surface and the sixth intermediate reflecting surface, and the second light shielding surface and the third light shielding surface are both coated with a light shielding material.

[0015] Further, the intermediate reflecting surface comprises a seventh intermediate reflecting surface; the included angle between the first reflecting surface and the incident surface is greater than 45 degrees and less than 90 degrees; the included angle between the second reflecting surface and the exit surface is the same as the included angle between the first reflecting surface and the incident surface; the first reflecting surface and the second reflecting surface are adjacent to a fourth light shielding surface, the fourth light shielding surface is parallel to the seventh intermediate reflecting surface; the two sides of the seventh intermediate reflecting surface are adjacent to a fifth light shielding surface and a sixth light shielding surface respectively; the fifth light shielding surface is adjacent to the incident surface, and the fifth light shielding surface is parallel to the first reflecting surface; the sixth light shielding surface is adjacent to the exit surface, and the sixth light shielding surface is parallel to the second reflecting surface; the fifth light shielding surface and the sixth light shielding surface are coated with light shielding material.

[0016] Further, the intermediate reflecting surface comprises an eighth intermediate reflecting surface and a ninth intermediate reflecting surface; the eighth intermediate reflecting surface is adjacent to the second reflecting surface, and the eighth intermediate reflecting surface is the same surface as the incident surface; the ninth intermediate reflecting surface is adjacent to the first reflecting surface, and the ninth intermediate reflecting surface is the same surface as the exit surface; the eighth intermediate reflecting surface and the ninth intermediate reflecting surface are adjacent to a seventh light shielding surface; the seventh light shielding surface is coated with light shielding material.

[0017] The utility model discloses a third aspect further provides a kind of electronic equipment, uses the periscope lens as above.

[0018] The utility model discloses a third aspect further provides a kind of electronic equipment, uses the periscope lens as above.

[0019] The utility model discloses a kind of long focus reflecting prism, at least have the following beneficial effects: 1. the scheme is set up multiple reflecting surfaces in reflecting prism, so that light is reflected multiple times along multiple reflecting surfaces after entering reflecting prism, to prolong optical path, further can increase the focal length of periscope lens module;2. the scheme is set with a triangular prism before lens group, so that it can be reflected as parallel to the light of electronic equipment plane by the light of vertical shooting into electronic equipment, so that lens group can be placed along the direction of the light of this triangular prism, without being placed along the direction perpendicular to the plane of electronic equipment, so that the thickness of electronic equipment can be reduced. BRIEF DESCRIPTION OF DRAWINGS

[0020] The accompanying drawings, which are included to provide a further understanding of the application and are incorporated in and constitute a part of this application, illustrate embodiments of the application and together with the description serve to explain the application. In the drawings:

[0021] Figure 1 Structure diagram of a long-focus reflecting prism according to an embodiment of the present application.

[0022] Figure 2 Structure diagram of a long-focus reflecting prism according to an embodiment of the present application.

[0023] Figure 3 Structure diagram of a long-focus reflecting prism according to an embodiment of the present application.

[0024] Figure 4 Structure diagram of a long-focus reflecting prism according to an embodiment of the present application.

[0025] BRIEF DESCRIPTION OF THE DRAWINGS

[0026] Reflecting prism-1; incident surface-11; emergent surface-12; first reflecting surface-13; second reflecting surface-14; first intermediate reflecting surface-151; second intermediate reflecting surface-152; third intermediate reflecting surface-153; fourth intermediate reflecting surface-154; fifth intermediate reflecting surface-155; sixth intermediate reflecting surface-156; seventh intermediate reflecting surface-157; eighth intermediate reflecting surface-158; ninth intermediate reflecting surface-159; triangular prism-2; lens group-3; imaging surface-4; first light shielding surface-51; second light shielding surface-52; third light shielding surface-53; fourth light shielding surface-54; fifth light shielding surface-55; sixth light shielding surface-56; seventh light shielding surface-57. DETAILED DESCRIPTION

[0027] The present application will be further described by the following embodiments with reference to the accompanying drawings.

[0028] Please refer to Figures 1-4The long-focus reflection prism comprises an incident surface 11, an exit surface 12, a first reflection surface 13, a second reflection surface 14 and at least one intermediate reflection surface; the light ray passing through the lens group 3 enters the reflection prism 1 vertically from the incident surface 11, is reflected by the first reflection surface 13, the intermediate reflection surface and the second reflection surface 14 in turn, and is emitted vertically from the exit surface 12 to the imaging surface 4; the first reflection surface 13, the second reflection surface 14 and each intermediate reflection surface reflect the light ray only once; the incident surface 11 and the exit surface 12 are parallel and located on different sides of the reflection prism 1. The present scheme prolongs the optical path by arranging multiple reflection surfaces, i.e. the first reflection surface 13, the second reflection surface 14 and at least one intermediate reflection surface, in the reflection prism 1, so that the light ray is reflected multiple times along the multiple reflection surfaces after entering the reflection prism 1, thereby increasing the focal length of the periscope lens module. The light ray is reflected along the first reflection surface 13, the intermediate reflection surface and the second reflection surface 14 in turn, and is reflected only once on each reflection surface. It should be noted that the angle of each reflection surface in the present scheme can ensure that the light ray does not cross itself during reflection, thereby avoiding the influence of imaging due to the self-crossing of the light ray. In addition, the incident surface 11 is adjacent to the first reflection surface 13, and the included angle between them is an acute angle; the exit surface 12 is adjacent to the second reflection surface 14, and the included angle between them is an acute angle. It should be noted that the light ray is used to indicate the propagation direction of the light in the reflection prism 1, not the actual optical path.

[0029] Please refer to Figure 1 In some embodiments, the number of intermediate reflection surfaces is two, including a first intermediate reflection surface 151 and a second intermediate reflection surface 152; the first intermediate reflection surface 151 is adjacent to the incident surface 11, and the included angle between them is an obtuse angle; the second intermediate reflection surface 152 is adjacent to the exit surface 12, and the included angle between them is an obtuse angle; the first reflection surface 13 and the second reflection surface 14 are adjacent, and the included angle between them is a right angle.

[0030] In addition, the first intermediate reflecting surface 151 is parallel to the first reflecting surface 13, and the second intermediate reflecting surface 152 is parallel to the second reflecting surface 14; the first intermediate reflecting surface 151 and the second intermediate reflecting surface 152 are adjacent to the first light shielding surface 51, and the first light shielding surface 51 is coated with a light shielding material. The light is vertically incident into the reflecting prism 1 through the incident surface 11, and is reflected for the first time at the first reflecting surface 13, for the second time at the first intermediate reflecting surface 151, for the third time at the second intermediate reflecting surface 152, and for the fourth time at the second reflecting surface 14, and then is vertically emitted to the imaging surface 4 through the exit surface 12. In this embodiment, the light is reflected four times in the reflecting prism 1, and the angles between the incident surface 11, the first reflecting surface 13, the intermediate reflecting surface, the second reflecting surface 14 and the exit surface 12 in the reflecting prism 1 are set to ensure that the light is emitted to the imaging surface 4 along a direction perpendicular to the exit surface 12.

[0031] Please refer to Figure 2 In some embodiments, the number of intermediate reflecting surfaces is four, including a third intermediate reflecting surface 153, a fourth intermediate reflecting surface 154, a fifth intermediate reflecting surface 155 and a sixth intermediate reflecting surface 156; the third intermediate reflecting surface 153 is adjacent to the incident surface 11, and the angle between them is an obtuse angle; the fourth intermediate reflecting surface 154 is adjacent to the second reflecting surface 14, and the angle between them is a right angle; the fifth intermediate reflecting surface 155 is adjacent to the first reflecting surface 13, and the angle between them is a right angle; and the sixth intermediate reflecting surface 156 is adjacent to the exit surface 12, and the angle between them is an obtuse angle.

[0032] In the embodiment, the third intermediate reflecting surface 153 is parallel to the first reflecting surface 13; the fourth intermediate reflecting surface 154 is parallel to the fifth intermediate reflecting surface 155; the sixth intermediate reflecting surface 156 is parallel to the second reflecting surface 14; the second light shielding surface 52 and the third light shielding surface 53 are respectively adjacent to the third intermediate reflecting surface 153 and the fifth intermediate reflecting surface 155, and the second light shielding surface 52 and the third light shielding surface 53 are coated with light shielding material. The light is vertically incident into the reflecting prism 1 from the incident surface 11, and is reflected for the first time at the first reflecting surface 13, for the second time at the third intermediate reflecting surface 153, for the third time at the fourth intermediate reflecting surface 154, for the fourth time at the fifth intermediate reflecting surface 155, for the fifth time at the sixth intermediate reflecting surface 156, and for the sixth time at the second reflecting surface 14, and then is vertically emitted from the exit surface 12 to the imaging surface 4. In the embodiment, the light is reflected for four times in the reflecting prism 1, and the angles between the incident surface 11, the first reflecting surface 13, the intermediate reflecting surface, the second reflecting surface 14 and the exit surface 12 are arranged to ensure that the light is emitted to the imaging surface 4 along a direction perpendicular to the exit surface 12.

[0033] Please refer to Figure 3 In some embodiments, the number of intermediate reflecting surfaces is one, i.e. the seventh intermediate reflecting surface 157; the angle between the first reflecting surface 13 and the incident surface 11 is greater than 45 degrees and less than 90 degrees (preferably greater than 50 degrees and less than 85 degrees); the angle between the second reflecting surface 14 and the exit surface 12 is the same as the angle between the first reflecting surface 13 and the incident surface 11; the sixth light shielding surface 56 is adjacent to the first reflecting surface 13 and the second reflecting surface 14, and the sixth light shielding surface 56 is parallel to the seventh intermediate reflecting surface 157; the fourth light shielding surface 54 and the fifth light shielding surface 55 are respectively adjacent to the two sides of the seventh intermediate reflecting surface 157; the fourth light shielding surface 54 is adjacent to the incident surface 11, and the fourth light shielding surface 54 is parallel to the first reflecting surface 13; the fifth light shielding surface 55 is adjacent to the exit surface 12, and the fifth light shielding surface 55 is parallel to the second reflecting surface 14; the fourth light shielding surface 54, the fifth light shielding surface 55 and the sixth light shielding surface 56 are coated with light shielding material. In the embodiment, the light is vertically incident into the reflecting prism 1 from the incident surface 11, and is reflected for the first time at the first reflecting surface 13, for the second time at the seventh intermediate reflecting surface 157, and for the third time at the second reflecting surface 14, and then is vertically emitted from the exit surface 12 to the imaging surface 4. In the embodiment, the light is reflected for three times in the reflecting prism 1, and the angles between the incident surface 11, the first reflecting surface 13, the intermediate reflecting surface, the second reflecting surface 14 and the exit surface 12 are arranged to ensure that the light is emitted to the imaging surface 4 along a direction perpendicular to the exit surface 12.

[0034] Please refer to Figure 4 In some embodiments, the number of intermediate reflecting surfaces is two, including an eighth intermediate reflecting surface 158 and a ninth intermediate reflecting surface 159; the eighth intermediate reflecting surface 158 is adjacent to the second reflecting surface 14, and the eighth intermediate reflecting surface 158 is the same surface as the incident surface 11; the ninth intermediate reflecting surface 159 is adjacent to the first reflecting surface 13, and the ninth intermediate reflecting surface 159 is the same surface as the exit surface 12; the seventh light shielding surface 57 is adjacent between the eighth intermediate reflecting surface 158 and the ninth intermediate reflecting surface 159; the seventh light shielding surface 57 is coated with a light shielding material. In this embodiment, the light vertically enters the reflecting prism 1 from the incident surface 11, is reflected for the first time at the first reflecting surface 13, is reflected for the second time at the eighth intermediate reflecting surface 158, is reflected for the third time at the ninth intermediate reflecting surface 159, is reflected for the fourth time at the second reflecting surface 14, and then is vertically emitted to the imaging surface 4 from the exit surface 12. That is, the light in this embodiment is reflected four times in the reflecting prism 1, and the angles between the incident surface 11, the first reflecting surface 13, the intermediate reflecting surface, the second reflecting surface 14 and the exit surface 12 in the reflecting prism 1 are arranged to ensure that the light is emitted to the imaging surface 4 along a direction perpendicular to the exit surface 12.

[0035] The utility model also provides a periscope lens, including triangular prism 2, lens group 3 and image sensor, triangular prism 2 can be reflected as parallel to the light of electronic equipment plane of vertical emission electronic equipment's light, lens group 3 is placed along by the direction of the light of triangular prism 2 exit, the end of lens group 3 is provided with the reflecting prism 1 as any one of above-mentioned embodiment, the short side of image sensor is set up after the exit surface 12 of reflecting prism 1 with perpendicular to the direction of electronic equipment plane, and the imaging surface 4 of image sensor is parallel with exit surface 12.

[0036] The utility model also provides an electronic equipment, which adopts the periscope lens in the above-mentioned embodiments.

[0037] The present scheme sets multiple reflecting surfaces in the reflecting prism 1, so that the light is reflected multiple times along the multiple reflecting surfaces after entering the reflecting prism 1, thereby prolonging the optical path and further increasing the focal length of the periscope lens module. Meanwhile, a triangular prism 2 is arranged in front of the lens group 3, so that the light vertically emitted to the electronic equipment can be reflected as parallel to the plane of the electronic equipment, thereby enabling the lens group 3 to be placed along the direction of the light emitted by the triangular prism 2, without being placed along the direction perpendicular to the plane of the electronic equipment, thereby reducing the thickness of the electronic equipment.

[0038] The above merely expresses the preferred embodiments of the utility model, and the description is relatively specific and detailed, but it should not be understood as a limitation on the scope of the utility model patent. It should be noted that for ordinary skilled persons in the art, without departing from the concept of the utility model, a number of modifications and improvements can be made, which all belong to the protection scope of the utility model. Therefore, the protection scope of the utility model patent should be subject to the appended claims.

Claims

1. A long focal length reflecting prism characterized in that, The reflecting prism comprises an incident surface, an emergent surface, a first reflecting surface, a second reflecting surface and at least one intermediate reflecting surface; The light rays passing through the lens group enter the reflecting prism perpendicularly from the incident surface, are reflected by the first reflecting surface, the intermediate reflecting surfaces and the second reflecting surface in turn, and are emitted perpendicularly from the emergent surface to the imaging surface; The first reflecting surface, the second reflecting surface and each intermediate reflecting surface reflect the light rays only once; The incident surface and the emergent surface are parallel and are located on different sides of the reflecting prism.

2. The long focal length reflective prism of claim 1, wherein, The incident surface is adjacent to the first reflecting surface and the included angle between them is an acute angle; the emergent surface is adjacent to the second reflecting surface and the included angle between them is an acute angle.

3. The long focal length catadioptric prism of claim 2, wherein, The intermediate reflecting surfaces comprise a first intermediate reflecting surface and a second intermediate reflecting surface; the first intermediate reflecting surface is adjacent to the incident surface and the included angle between them is an obtuse angle; the second intermediate reflecting surface is adjacent to the emergent surface and the included angle between them is an obtuse angle; the first reflecting surface and the second reflecting surface are adjacent and the included angle between them is a right angle.

4. The long focal length catadioptric prism of claim 3, wherein, The first intermediate reflecting surface is parallel to the first reflecting surface and the second intermediate reflecting surface is parallel to the second reflecting surface; a first light shielding surface is adjacent to the first intermediate reflecting surface and the second intermediate reflecting surface, and the first light shielding surface is coated with a light shielding material.

5. The long focal length reflective prism of claim 2, wherein, The intermediate reflecting surfaces comprise a third intermediate reflecting surface, a fourth intermediate reflecting surface, a fifth intermediate reflecting surface and a sixth intermediate reflecting surface; the third intermediate reflecting surface is adjacent to the incident surface and the included angle between them is an obtuse angle; the fourth intermediate reflecting surface is adjacent to the second reflecting surface and the included angle between them is a right angle; the fifth intermediate reflecting surface is adjacent to the first reflecting surface and the included angle between them is a right angle; the sixth intermediate reflecting surface is adjacent to the emergent surface and the included angle between them is an obtuse angle.

6. The long focal length catadioptric prism of claim 5, wherein, The third intermediate reflecting surface is parallel to the first reflecting surface; the fourth intermediate reflecting surface is parallel to the fifth intermediate reflecting surface; the sixth intermediate reflecting surface is parallel to the second reflecting surface; a second light shielding surface and a third light shielding surface are respectively adjacent to the third intermediate reflecting surface and the fourth intermediate reflecting surface, and the fifth intermediate reflecting surface and the sixth intermediate reflecting surface, and the second light shielding surface and the third light shielding surface are both coated with a light shielding material.

7. The long focal length reflective prism of claim 2, wherein, The intermediate reflecting surfaces comprise a seventh intermediate reflecting surface; the included angle between the first reflecting surface and the incident surface is greater than 45 degrees and less than 90 degrees; the included angle between the second reflecting surface and the emergent surface is the same as the included angle between the first reflecting surface and the incident surface; a fourth light shielding surface is adjacent to the first reflecting surface and the second reflecting surface, the fourth light shielding surface is parallel to the seventh intermediate reflecting surface; a fifth light shielding surface and a sixth light shielding surface are respectively adjacent to two sides of the seventh intermediate reflecting surface; the fifth light shielding surface is adjacent to the incident surface and the fifth light shielding surface is parallel to the first reflecting surface; the sixth light shielding surface is adjacent to the emergent surface and the sixth light shielding surface is parallel to the second reflecting surface; the fifth light shielding surface and the sixth light shielding surface are both coated with a light shielding material.

8. The long focal length reflective prism of claim 2, wherein, The intermediate reflecting surface comprises an eighth intermediate reflecting surface and a ninth intermediate reflecting surface; the eighth intermediate reflecting surface is adjacent to the second reflecting surface, and the eighth intermediate reflecting surface is the same surface as the incident surface; the ninth intermediate reflecting surface is adjacent to the first reflecting surface, and the ninth intermediate reflecting surface is the same surface as the exit surface; the eighth intermediate reflecting surface and the ninth intermediate reflecting surface are adjacent to each other via a seventh light shielding surface; and the seventh light shielding surface is coated with a light shielding material.

9. A periscopic lens characterized by, The electronic device comprises a triangular prism, a lens group and an image sensor; the triangular prism can reflect light vertically incident on the electronic device into light parallel to the plane of the electronic device; the lens group is arranged along the direction of light exiting the triangular prism; the lens group is provided with the reflecting prism according to any one of claims 1-8 at the end thereof; and the short side of the image sensor is arranged behind the exit surface of the reflecting prism in a direction perpendicular to the plane of the electronic device, and the imaging surface of the image sensor is parallel to the exit surface.

10. An electronic device, comprising: The electronic device adopts the periscope lens according to claim 9.

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