CN111427224A

CN111427224A - Mounting structure of projection imaging lens group and projection imaging device

Info

Publication number: CN111427224A
Application number: CN201910024199.4A
Authority: CN
Inventors: 陈友才; 杨长明; 朱瑞
Original assignee: Qingdao Hisense Laser Display Co Ltd
Current assignee: Qingdao Hisense Laser Display Co Ltd
Priority date: 2019-01-10
Filing date: 2019-01-10
Publication date: 2020-07-17
Anticipated expiration: 2039-01-10
Also published as: CN111427224B

Abstract

The invention discloses a mounting structure of a projection imaging lens group and a projection imaging device, relates to the technical field of projection display, and provides a corresponding mounting structure for the projection imaging lens group with a plane reflector. The invention comprises a base, an incident lens cone and an emergent lens cone which are arranged on the base, wherein the incident lens cone is detachably connected with the base along a first direction, the emergent lens cone is detachably connected with the base along a second direction, an incident lens group used for installing a projection imaging lens group is arranged in the incident lens cone, an emergent lens group used for installing the projection imaging lens group is arranged in the emergent lens cone, the first direction and the second direction form a first angle, and the intersection of the first direction and the second direction of the base is used for installing a plane reflector of the projection imaging lens group. The invention is used for installing the projection imaging lens group.

Description

Mounting structure of projection imaging lens group and projection imaging device

Technical Field

The invention relates to the technical field of projection display, in particular to a mounting structure of a projection imaging lens group and a projection imaging device.

Background

The ultra-short-focus projection technology is a novel projection display technology developed in recent years, and is characterized in that the display effect of a large-amplitude picture is realized under a short projection distance, and because the working distance is short, the ultra-short-focus projection technology is almost close to a projection screen, the use space is greatly saved; meanwhile, the problem that strong light is easy to directly irradiate human eyes when a common projector works is also solved, the ultra-short-focus projection technology is an important direction for the development of the projection technology, the realization of the technology mainly depends on a specially designed projection objective, and a catadioptric imaging optical system design method is generally adopted at present. The refraction-reflection type imaging optical scheme comprises a lens group and a concave reflecting mirror, but the concave reflecting mirror is difficult to process and unstable in imaging.

Therefore, in order to avoid the use of the concave reflecting mirror, the prior art provides a new projection imaging lens assembly scheme to realize ultra-short focus projection, and the projection imaging lens assembly of the scheme includes an incident lens assembly, a plane reflecting mirror and an emergent lens assembly. The light beams are reflected to the plane reflector after being refracted by the incident lens group, are reflected to the emergent lens group by the plane reflector, and are refracted out by the emergent lens group, and finally, ultra-short-focus projection imaging is realized. However, there is no corresponding mounting structure for the projection imaging lens group in the prior art to provide a fixed mounting for the projection imaging lens group with the plane mirror.

Disclosure of Invention

The embodiment of the invention provides a mounting structure of a projection imaging lens group and a projection imaging device, and provides a corresponding mounting structure for the projection imaging lens group with a plane reflector.

In order to achieve the above purpose, the embodiment of the invention adopts the following technical scheme:

the utility model provides a mounting structure of projection imaging mirror group, includes the base and sets up incident lens cone and exit lens cone on the base, incident lens cone along first direction with the base can be dismantled and be connected, exit lens cone along the second direction with the base can be dismantled and be connected, be used for the installation in the incident lens cone the incident mirror group of projection imaging mirror group, be used for the installation in the exit lens cone the exit mirror group of projection imaging mirror group, first direction with the second direction is first angle, just the base first direction with the intersection of second direction is used for the installation the plane mirror of projection imaging mirror group.

The installation structure of the projection imaging lens group comprises a base, and an incident lens cone and an emergent lens cone which are arranged on the base, wherein the incident lens cone is independently provided with the incident lens group of the projection imaging lens group, the emergent lens cone is independently provided with the emergent lens group of the projection imaging lens group, and the base is independently provided with a plane reflecting mirror of the projection imaging lens group. The incident lens cone is connected with the base along a first direction, the emergent lens cone is connected with the base along a second direction, at the moment, the axis of the incident lens cone and the axis of the emergent lens cone form a first angle, and the plane reflector of the projection imaging lens group is positioned at the intersection of the extending directions of the incident lens cone and the emergent lens cone. The light rays to be projected and imaged are incident into the incident lens cone from the outside, after being refracted by the incident lens group of the projection imaging lens group, the incident light rays are emitted to the plane reflector of the projection imaging lens group arranged on the base along the incident lens cone, the incident light rays are reflected to the emergent lens cone through the reflection of the plane reflector of the projection imaging lens group, the reflected light rays are incident into the emergent lens group of the projection imaging lens group along the emergent lens cone, and are refracted by the emergent lens group of the projection imaging lens group, so that the projection imaging is realized. The included angle of the light path is the first angle formed by the incident lens cone and the emergent lens cone.

On the other hand, the embodiment of the invention also provides a projection imaging device, which comprises a projection imaging lens group, and further comprises an installation structure of the projection imaging lens group, wherein the projection imaging lens group comprises an incident lens group, a plane reflecting mirror and an emergent lens group, and the projection imaging lens group is installed on the installation structure of the projection imaging lens group.

The projection imaging device provided by the embodiment of the invention adopts the projection imaging lens group with the plane reflecting mirror and comprises the mounting structure of the projection imaging lens group, and the projection imaging lens group is mounted on the mounting structure of the projection imaging lens group, so that the processing difficulty is low and the imaging is stable while the realization of ultra-short-focus projection imaging is ensured.

Drawings

In order to more clearly illustrate the technical solutions of the embodiments of the present invention, the drawings needed to be used in the description of the embodiments are briefly introduced below, and it is obvious that the drawings in the following description are only some embodiments of the present invention, and it is obvious for those skilled in the art to obtain other drawings based on these drawings without creative efforts.

FIG. 1 is a schematic diagram of a prior art light scheme of a projection imaging lens assembly with a plane mirror;

FIG. 2 is a general view of a mounting structure of a projection imaging lens assembly according to an embodiment of the present invention;

FIG. 3 is a schematic structural diagram of a base of a first embodiment of a mounting structure of a projection imaging lens group according to an embodiment of the present invention;

FIG. 4 is a schematic structural diagram of a first embodiment of a mounting structure of a projection imaging lens group according to an embodiment of the present invention;

FIG. 5 is a schematic structural diagram of a second adjustment ring of the first aspect of the mounting structure of the projection imaging lens assembly according to the embodiment of the present invention;

FIG. 6 is a schematic structural diagram of a base of a second embodiment of a mounting structure of a projection imaging lens assembly according to an embodiment of the present invention;

fig. 7 is a structural diagram of a second scheme of the mounting structure of the projection imaging lens group according to the embodiment of the invention.

Reference numerals:

1-a base; 11-incident mounting cylinder; 12-an exit mounting cylinder; 13-an incident mounting surface; 131-incident avoidance holes; 14-an exit mounting surface; 141-exit avoidance holes; 15-mirror mounting face; 151-card slot; 16-mounting holes; 2-an entrance lens barrel; 3-an exit column; 4-an incident lens group of the projection imaging lens group; 5-an exit lens group of the projection imaging lens group; 6-a plane reflector of the projection imaging lens group; 7-a first adjusting ring; 8-a second adjustment ring; 81-emitting an adjusting positioning hole; 9-mirror press plate; 10-cover plate.

Detailed Description

The technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only a part of the embodiments of the present invention, and not all of the embodiments. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.

In the description of the present invention, it is to be understood that the terms "center", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", and the like indicate orientations or positional relationships based on those shown in the drawings, and are only for convenience of description and simplicity of description, and do not indicate or imply that the referenced devices or elements must have a particular orientation, be constructed and operated in a particular orientation, and thus, are not to be construed as limiting the present invention.

The terms "first", "second" and "first" are used for descriptive purposes only and are not to be construed as indicating or implying relative importance or implicitly indicating the number of technical features indicated. Thus, a feature defined as "first" or "second" may explicitly or implicitly include one or more of that feature. In the description of the present invention, "a plurality" means two or more unless otherwise specified.

In the description of the present invention, it should be noted that, unless otherwise explicitly specified or limited, the terms "mounted," "connected," and "connected" are to be construed broadly, e.g., as meaning either a fixed connection, a removable connection, or an integral connection; they may be connected directly or indirectly through intervening media, or they may be interconnected between two elements. The specific meanings of the above terms in the present invention can be understood by those skilled in the art according to specific situations.

An installation structure of a projection imaging lens group provided in an embodiment of the present invention is shown in fig. 1 and fig. 2, and includes a base 1, and an incident lens barrel 2 and an exit lens barrel 3 that are disposed on the base 1, where the incident lens barrel 2 is detachably connected to the base 1 along a first direction, the exit lens barrel 3 is detachably connected to the base 1 along a second direction, an incident lens group 4 of the projection imaging lens group is installed in the incident lens barrel 2, an exit lens group 5 of the projection imaging lens group is installed in the exit lens barrel 3, the first direction and the second direction form a first angle, and a junction of the first direction and the second direction of the base 1 is used for installing a plane mirror 6 of the projection imaging lens group.

The mounting structure of the projection imaging lens group according to the embodiment of the present invention, as shown in fig. 1 and 2, includes a base 1, and an incident lens barrel 2 and an exit lens barrel 3 which are arranged on the base 1, the incident lens barrel 2 is independently mounted with an incident lens group 4 of the projection imaging lens group, the exit lens barrel 3 is independently mounted with an exit lens group 5 of the projection imaging lens group, and the base 1 is independently mounted with a plane mirror 6 of the projection imaging lens group. The incident lens cone 2 is connected with the base 1 along a first direction, the exit lens cone 3 is connected with the base 1 along a second direction, at the moment, the axis of the incident lens cone 2 and the axis of the exit lens cone 3 form a first angle, and the plane reflector 6 of the projection imaging lens group is positioned at the intersection of the extending directions of the incident lens cone 2 and the exit lens cone 3. A group of light rays to be projected and imaged are incident into the incident lens cone 2 from the outside, after being refracted by the incident lens group 4 of the projection imaging lens group, the incident light rays are emitted to the plane reflecting mirror 6 of the projection imaging lens group arranged on the base 1 along the incident lens cone 2, the incident light rays are reflected to the emergent lens cone 3 through the reflection of the plane reflecting mirror 6 of the projection imaging lens group, the reflected light rays are incident into the emergent lens group 5 of the projection imaging lens group along the emergent lens cone 3, and are refracted by the emergent lens group 5 of the projection imaging lens group, so that the projection imaging is realized. The included angle of the light path is the first angle formed by the incident lens barrel 2 and the emergent lens barrel 3.

It should be noted that the precise mounting positions of the incident lens barrel 2 and the base 1 and the precise mounting positions of the exit lens barrel 3 and the base 1 are both designed by the optical scheme and the actual imaging effect of the projection imaging lens group, and the plane mirror 6 of the projection imaging lens group is mounted in a more concentrated area after the incident light is refracted and contracted, and is perpendicular to the angular bisector of the first angle, so as to ensure the reflection angle and direction of the whole group of light.

According to the mounting structure of the projection imaging lens group, the following two schemes are specifically designed;

the base 1 of the first solution is formed by intersecting two cylindrical cylinders, namely an incident installation cylinder 11 and an emergent installation cylinder 12, and because the incident installation cylinder 11 on the base 1 is connected with the incident lens barrel 2 and the emergent installation cylinder 12 is connected with the emergent lens barrel 3, an included angle formed by the axis of the incident installation cylinder 11 on the base 1 and the axis of the emergent installation cylinder 12 is an included angle of a light path. Therefore, according to the above-mentioned first angle formed by the first direction and the second direction is the angle of the light path, as shown in fig. 3 and 4, the base 1 is provided with the incident installation cylinder 11 extending along the first direction and the exit installation cylinder 12 extending along the second direction, the incident lens barrel 2 is connected with the incident installation cylinder 11, and the exit lens barrel 3 is connected with the exit installation cylinder 12.

According to above-mentioned base 1, because the restriction of base 1 inner space, the plane mirror 6 of projection imaging lens group can only install in base 1's outside, therefore, base 1 is equipped with the speculum mounting groove that the opening is outwards, the plane mirror 6 of projection imaging lens group is packed into in the speculum mounting groove on base 1, simultaneously in order to protect the lens and guarantee the compactness of assembly, need increase detachable speculum clamp plate 9, utilize speculum clamp plate 9 to compress tightly the plane mirror 6 of projection imaging lens group in the speculum groove fixed, speculum clamp plate 9 has the multiple with base 1's connected mode, for example through the buckle, fixed connection's such as screw mode. Because reflector clamp plate 9 and base 1 are fixed back, do not need frequent dismantlement, and adopt the mode of screw fixed connection, connection structure design is simple, consequently chooses for use screw fixed connection. As shown in fig. 4, the base 1 is provided with a reflector mounting groove with an outward opening, the opening of the reflector mounting groove is detachably connected with a reflector pressing plate 9, the reflector mounting groove is used for mounting the plane reflector 6 of the projection imaging lens group, and the reflector pressing plate 9 is matched with the reflector mounting groove to compress and fix the plane reflector 6 of the projection imaging lens group.

Because the base 1 is provided with two intersected cylindrical barrels with a first angle, the requirements on the processing precision and the shape tolerance are high, and high-precision processing equipment with a shaft shifting function is needed for realizing the processing precision and the shape tolerance of the base 1 along the axial direction, in order to eliminate the processing precision and the shape tolerance of the base 1 along the axial direction, the installation position of the incident lens barrel 2 can be adjusted along the axial direction of the incident installation barrel 11, and the installation position of the emergent lens barrel 3 can be adjusted along the axial direction of the emergent installation barrel 12. Referring to fig. 4 and 5, the adjustment structure thereof is as follows.

A plurality of incident positioning holes are distributed on the incident mounting cylinder 11 of the base 1 along the axial direction thereof, and the incident lens barrel 2 is fixed with the incident mounting cylinder 11 through any incident positioning hole;

and/or;

a plurality of exit positioning holes are distributed on the exit mounting cylinder 12 of the base 1 along the axial direction thereof, and the exit lens barrel 3 is fixed with the exit mounting cylinder 12 through any exit positioning hole.

It should be noted that a plurality of incident positioning holes may be distributed on the incident lens barrel 2 along the axial direction thereof, and the incident lens barrel 2 is fixed with the incident mounting barrel 11 through any one of the incident positioning holes; similarly, a plurality of exit positioning holes may be distributed on the exit lens barrel 3 along the axial direction thereof, and the exit lens barrel 3 is fixed to the exit mounting barrel 12 through any one of the exit positioning holes.

Similarly, in order to achieve the above-mentioned function of adjusting along the axis, the adjusting ring structure may also be designed separately, and referring to fig. 4 and 5, a plurality of incident adjusting positioning holes are provided on the first adjusting ring 7, and a plurality of emergent adjusting positioning holes 81 are provided on the second adjusting ring 8, wherein the first adjusting ring 7 and the second adjusting ring 8 have the same structure. The incident lens barrel 2 can be clamped into the incident adjustment positioning holes of the first adjustment ring 7 at different positions through pins, screws and the like, so that the position of the incident lens barrel 2 can be adjusted correspondingly. The exit lens barrel 3 can be clamped into the exit adjusting positioning holes of the second adjusting ring 8 at different positions through pins, screws and the like to correspondingly adjust the position of the exit lens barrel 3. As shown in fig. 4, the optical lens barrel further comprises a first adjusting ring 7 arranged between the incident lens barrel 2 and the incident mounting cylinder 11, and a second adjusting ring 8 arranged between the exit lens barrel 3 and the exit mounting cylinder 12, wherein the incident lens barrel 2 is connected with the incident mounting cylinder 11 through the first adjusting ring 7, and the first adjusting ring 7 is used for adjusting the position of the incident lens barrel 2 along the axial direction of the incident mounting cylinder 11; the exit lens barrel 3 is connected to the exit mount cylinder 12 through a second adjustment ring 8, and the second adjustment ring 8 is used to adjust the position of the exit lens barrel 3 in the axial direction of the exit mount cylinder 12.

The base 1 of the second scheme comprises an incident mounting surface 13 and an emergent mounting surface 15, wherein the incident mounting surface 13 is connected with the incident lens barrel 2, so that the incident mounting surface 13 is provided with an incident avoidance hole 131; since the exit mounting surface 15 is connected to the exit barrel 3, the exit mounting surface 15 is provided with an exit avoiding hole 151. In order to ensure that the incident light is reflected and transmitted along the exit tube 3, the incident mounting surface 13 and the exit mounting surface 15 form a second angle, which is complementary to the first angle according to the first angle mentioned above, i.e. the angle formed by the incident mounting surface 13 and the exit mounting surface 15 is complementary to the angle of the light path. As shown in fig. 6 and 7, the base 1 includes an incident mounting surface 13 and an exit mounting surface 15, an included angle between the incident mounting surface 13 and the exit mounting surface 15 is a second angle, the second angle is complementary to the first angle, the incident mounting surface 13 is provided with an incident avoidance hole 131, the exit mounting surface 15 is provided with an exit avoidance hole 151, the incident mounting surface 13 is used for connecting the incident lens barrel 2, and the exit mounting surface 15 is used for connecting the exit lens barrel 3.

It should be noted that, as shown in fig. 4 and 7, compared with the first solution, the base 1 of the second solution is a common independent turning part of a revolving body, the shape and tolerance of the processing are well guaranteed, and the installation of the lenses is also convenient, the incident lens barrel 2 of the incident lens group 4 of the projection imaging lens group and the exit lens barrel 3 of the exit lens group 5 of the projection imaging lens group are assembled, and when the optical index is tested, all the lens combinations are all arranged in the independent lens barrels to be adjusted independently. The base 1 of the first scheme is an intersecting body of two intersected cylindrical barrels, the lens barrel is complex in shape, and the space angle tolerance of the shape and the axial lead of the two cylindrical barrels can be guaranteed only by high-precision processing equipment with a shaft shifting function; however, the design basis, the processing basis and the measurement basis of the base 1 of the first scheme are not coincident, the processed parts are difficult to measure, the lens combination of the whole imaging device on assembly can show that one part is in the installation cylinder of the base 1 and the other part is in the independent lens cone, and the position of the problem is not beneficial to analysis to improve when the optical index is actually measured.

According to the second solution base 1 mentioned above, the optical module further includes a reflector mounting surface 15, the reflector mounting surface 15 is provided with a fixing structure for the plane reflector 6 of the projection imaging lens group, the plane reflector 6 of the projection imaging lens group is fixed by the fixing structure, and the fixing structure includes various structures, such as a slot 151, a groove, and the like. Since the plane mirror 6 of the projection imaging lens group is mounted on the outer side of the mirror mounting surface 15 and a protection plate needs to be added, the mounting position is set on the inner side of the mounting surface, and the plane mirror is fixed by the clamping groove 151 for the convenience of mounting and dismounting. As shown in fig. 6, the base 1 further includes a plane mirror mounting surface 15, a slot 151 is disposed inside the plane mirror mounting surface 15, and the slot 151 is used for mounting the plane mirror 6 of the projection imaging lens group.

In order to facilitate the installation and removal of the plane mirror 6 of the projection imaging lens group, as shown in fig. 7, a side surface of the base 1 adjacent to the plane mirror installation surface 15 is opened, and a cover plate 10 is detachably connected to the opening. When the plane mirror 6 of the projection imaging lens group needs to be mounted or dismounted, the cover plate 10 is taken down, and the plane mirror 6 of the projection imaging lens group is mounted in the slot 151 or taken out of the slot 151 from the opening. If the cover plate 10 is not protected, the strength of the housing is reduced, and contaminants such as dust can enter the housing, thereby affecting the imaging effect.

In order to ensure the stability of the base 1 and fix the base 1 in cooperation with a corresponding workbench, the base 1 is provided with a fixing structure, and the fixing mode can be bolts, welding and the like. Generally, the base 1 is provided with a mounting portion extending outwards and provided with a mounting hole 16, as shown in fig. 2.

In the description herein, particular features, structures, materials, or characteristics may be combined in any suitable manner in any one or more embodiments or examples.

The above description is only for the specific embodiments of the present invention, but the scope of the present invention is not limited thereto, and any changes or substitutions that can be easily conceived by those skilled in the art within the technical scope of the present invention are included in the scope of the present invention. Therefore, the protection scope of the present invention shall be subject to the protection scope of the claims.

Claims

1. The utility model provides a mounting structure of projection imaging mirror group, its characterized in that includes the base and sets up incident lens cone and exit lens cone on the base, incident lens cone along first direction with the base can be dismantled and be connected, exit lens cone along the second direction with the base can be dismantled and be connected, be used for the installation in the incident lens cone the incident mirror group of projection imaging mirror group, be used for the installation in the exit lens cone the exit mirror group of projection imaging mirror group, first direction with the second direction is first angle, just the base first direction with the junction of second direction is used for the installation the plane speculum of projection imaging mirror group.

2. The mounting structure of a projection imaging lens group as claimed in claim 1, wherein the base has an incident mounting cylinder extending along the first direction and an emergent mounting cylinder extending along the second direction, the incident lens barrel is connected to the incident mounting cylinder, and the emergent lens barrel is connected to the emergent mounting cylinder.

3. The mounting structure of a projection imaging lens group as claimed in claim 2, wherein the base has a reflector mounting groove with an outward opening, the opening of the reflector mounting groove is detachably connected with a reflector pressing plate, the reflector mounting groove is used for mounting the plane reflector of the projection imaging lens group, and the reflector pressing plate is matched with the reflector mounting groove to compress and fix the plane reflector of the projection imaging lens group.

4. The mounting structure of a projection imaging lens assembly according to claim 2, wherein a plurality of incident positioning holes are distributed on the incident mounting cylinder along an axial direction thereof, and the incident lens barrel is fixed to the incident mounting cylinder through any one of the incident positioning holes;

and/or;

a plurality of emergent positioning holes are distributed on the emergent mounting cylinder along the axial direction of the emergent mounting cylinder, and the emergent lens cone is fixed with the emergent mounting cylinder through any one of the emergent positioning holes.

5. The mounting structure of a projection imaging lens group according to claim 2, further comprising a first adjustment ring disposed between the entrance tube and the entrance mounting cylinder, and a second adjustment ring disposed between the exit tube and the exit mounting cylinder, wherein the entrance tube is connected to the entrance mounting cylinder through the first adjustment ring, and the first adjustment ring is used for adjusting the position of the entrance tube along the axial direction of the entrance mounting cylinder; the emergent lens cone is connected with the emergent mounting cylinder through the second adjusting ring, and the second adjusting ring is used for adjusting the position of the emergent lens cone along the axial direction of the emergent mounting cylinder.

6. The mounting structure of a projection imaging lens group according to claim 1, wherein the base includes an incident mounting surface and an exit mounting surface, an included angle between the incident mounting surface and the exit mounting surface is a second angle, the second angle is complementary to the first angle, the incident mounting surface is provided with an incident avoiding hole, the exit mounting surface is provided with an exit avoiding hole, the incident mounting surface is used for connecting the incident lens barrel, and the exit mounting surface is used for connecting the exit lens barrel.

7. The arrangement as claimed in claim 6, wherein the base further comprises a flat mirror mounting surface, and a locking groove is formed inside the flat mirror mounting surface for mounting the flat mirror of the projection imaging lens group.

8. The arrangement of claim 6, wherein a side of said base adjacent to said flat mirror is open, and a cover is detachably attached to said open.

9. The mounting structure of a projection imaging lens group as claimed in claim 1, wherein the base has a mounting portion extending outwardly therefrom, and the mounting portion has a mounting hole.

10. A projection imaging apparatus, comprising a projection imaging lens group, wherein the projection imaging lens group comprises an incident lens group, a plane reflecting mirror and an emergent lens group, and the projection imaging apparatus is characterized by further comprising a mounting structure of the projection imaging lens group according to any one of claims 1 to 9, and the projection imaging lens group is mounted on the mounting structure of the projection imaging lens group.