CN114355543A - Off-axis lens system - Google Patents
Off-axis lens system Download PDFInfo
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- CN114355543A CN114355543A CN202111499932.1A CN202111499932A CN114355543A CN 114355543 A CN114355543 A CN 114355543A CN 202111499932 A CN202111499932 A CN 202111499932A CN 114355543 A CN114355543 A CN 114355543A
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- G—PHYSICS
- G02—OPTICS
- G02B—OPTICAL ELEMENTS, SYSTEMS OR APPARATUS
- G02B7/00—Mountings, adjusting means, or light-tight connections, for optical elements
- G02B7/02—Mountings, adjusting means, or light-tight connections, for optical elements for lenses
- G02B7/023—Mountings, adjusting means, or light-tight connections, for optical elements for lenses permitting adjustment
Abstract
The invention discloses an off-axis optical system, comprising: a first optical element having a first central axis and defining a first optical axis; a second optical member having a second central axis and defining a second optical axis; an included angle is formed between the first central shaft and the second central shaft, and the second optical axis and the first optical axis are arranged in an off-axis mode; an adjusting member rotatably disposed between the first optical member and the second optical member; the adjusting piece comprises a first supporting surface and a second supporting surface; the first supporting surface is not parallel to the second supporting surface so as to change an included angle between the first central shaft and the second central shaft when the adjusting piece rotates, and therefore the included angle between the first optical axis and the second optical axis is adjusted. Above-mentioned off-axis optical system changes the contained angle between first optical axis and the second optical axis through the mode of rotatory regulating part, and overall structure is simple, and convenient operation is applicable to the angle fine setting between first optical axis and the second optical axis, can also guarantee the accuracy of system simultaneously.
Description
Technical Field
The disclosure belongs to the technical field of optical devices, and particularly relates to an off-axis lens system.
Background
In optics, an optical device has an imaginary line along which a light ray, when incident into the optical device, has its propagation path coincident with the line, which is called the optical axis.
In an optical system or optical assembly, typically comprising a plurality of optical devices, in some prior art optical systems, the optical axis of each optical device coincides with the mechanical center of the optical device, referred to as on-axis optical systems, but in prior art optical systems, in which the optical axis is separated from the mechanical center, referred to as off-axis optical systems, are also present.
Off-axis optical systems have a wide range of applications, and for example, in near-eye display devices, in order to satisfy various display parameters such as viewing angle and image quality, off-axis optical systems may be used. For an off-axis optical system, the angle of a lens away from an optical axis needs to be assembled very accurately, the included angle of the optical axis between the lenses arranged in a plurality of off-axes needs to strictly meet the design requirement, and even if the included angle between different lenses has extremely small error, the final display effect of the optical module is also greatly influenced.
Disclosure of Invention
The present disclosure is made based on the above-mentioned needs of the prior art, and an object of the present disclosure is to provide an off-axis optical system, in which an adjusting member is disposed between two optical members, and the adjusting member is rotated to adjust an angle between the two optical members, so as to meet optical requirements and ensure accuracy of the system.
In order to solve the above problem, the technical solution provided by the present disclosure includes:
an off-axis optical system is provided, comprising: a first optical member having a first central axis and defining a first optical axis; a second optical member having a second central axis and defining a second optical axis; an included angle is formed between the first central shaft and the second central shaft, and the second optical axis and the first optical axis are arranged in an off-axis mode; an adjusting member rotatably disposed between the first optical member and the second optical member; the adjusting member has a rotation axis intersecting the first center axis and coaxial with the second center axis; the adjusting piece comprises a first supporting surface and a second supporting surface; the adjusting piece comprises a first supporting surface and a second supporting surface; the first holding surface with the rotation axis slope is crossing, the second holding surface perpendicular to the rotation axis, first holding surface with the second holding surface nonparallel, with change when the regulating part rotates first center pin with contained angle between the second center pin, thereby adjust contained angle between first optical axis and the second optical axis. The included angle between the first optical axis in the first optical piece and the second optical axis of the second optical piece is adjusted through rotating the adjusting piece so as to meet the optical requirement, and the operation process is simple and high in precision.
Preferably, the first optical member is fixed in position in a direction of rotation about the first central axis, and the second optical member is fixed in position in a direction of rotation about the second central axis.
Preferably, when the position of the inclined surface of the first supporting surface changes due to the rotation of the adjusting member, the first optical member is attached to the first supporting surface by the inclination in the direction away from or close to the second optical member; the second supporting surface is connected with the second optical piece. The first optical element is attached to the first supporting surface, and when the inclination angle of the first supporting surface changes, the first optical element is driven to incline, so that the inclination angle of the first optical axis changes. The first supporting surface provides support for the first optical element, so that the whole structure is more stable.
Preferably, the first optical element comprises a first surface, the first surface being perpendicular to the first central axis; the portion of the first surface in contact with the first support surface includes a continuous flat surface, and the orientation of the first optical member tilting relative to the second optical member changes continuously and linearly when the adjustment member is rotationally adjusted.
Preferably, the first support surface is defined by a plurality of support points supporting the first optic in a plurality of positions.
Preferably, the supporting point includes a protrusion extending from the regulating member toward the first surface of the first optical member; the first surface includes a plurality of limiting grooves, and the limiting grooves accommodate the protrusions and guide a rotation path of the adjusting member. The protruding of regulating part is in the spacing groove of first optical element, along the path motion of spacing groove, the spacing groove provides direction and limiting displacement for the regulating part, through protruding and spacing groove complex mode, can also make entire system structure more stable, reduces unnecessary and rocks and increase systematic error.
Preferably, the shape of the limiting groove is matched with the rotating path of the protrusion; the notch of the limiting groove is opened towards the supporting point, the groove bottom of the limiting groove is abutted against the supporting point, and the side wall of the limiting groove limits the movement range of the supporting point when the adjusting piece rotates. The protrusions are fixed in the limiting grooves to limit the rotating path of the adjusting piece, and meanwhile, the protrusions and the adjusting piece are prevented from sliding to influence the final adjusting result in the rotating process.
Preferably, the second optical element comprises a second surface, the second surface being perpendicular to the second central axis; the part of the second surface, which is in contact with the second supporting surface, is formed into a plane, and the adjusting piece rotates along the second surface; the second surface and the first surface have an inclination angle. So set up and make at the rotatory in-process of regulating part, the rotation axis and the second center pin of regulating part are coaxial all the time, and the angle of first center pin for the second center pin changes, and then changes the contained angle between first optical axis and the second optical axis.
Preferably, the second surface is provided with a sliding groove for accommodating the second supporting surface and guiding the rotation of the second supporting surface. The rotating track and the path of the adjusting piece are limited by the sliding groove, so that the whole system is more stable.
Preferably, the first surface and the second surface are respectively provided with a guide groove corresponding to a first supporting surface and a second supporting surface of the adjusting part; the off-axis optical system further includes a retaining member operable to secure the first and second optical members to the adjustment member through the guide slots, respectively. The arrangement makes the angle between the adjusted first optical axis and the second optical axis constant, so as to achieve the optical requirement constantly and stably.
Preferably, the range of adjusting the included angle between the first optical axis and the second optical axis is below 3 degrees.
Preferably, the first optical member includes a first opposite end, the first opposite end being opposite the second optical member; the first opposing end includes a first lateral extension extending outwardly from a side of the first optic; the second optic includes a second opposing end, the second opposing end opposing the first optic; a second opposing end including a second lateral extension extending laterally from a side of the second optic in spaced relation to the first lateral extension; the adjustment member is disposed between the first lateral extension and the second lateral extension; the first and second support surfaces of the adjustment member are at least partially in contact with the first and second lateral extensions, respectively.
Preferably, the support sleeve is arranged between the first transverse extension part and the second transverse extension part; the supporting sleeve and the second optical piece are oppositely and fixedly arranged; the adjusting piece is sleeved on the outer side of the supporting sleeve, and a first supporting surface and a second supporting surface of the adjusting piece in the longitudinal direction are at least partially contacted with the first transverse extending portion and the second transverse extending portion respectively.
Preferably, a ball is disposed between the adjacent surfaces of the adjusting member and the support sleeve. So arranged as to effect rotation of the adjustment member.
Compared with the prior art, the system disclosed by the invention realizes the tiny adjustment of the included angle between the first optical axis and the second optical axis based on the rotation of the adjusting piece within a large angle range. The system provided by the disclosure is relatively stable, the included angle between the first optical axis and the second optical axis in the off-axis optical system is changed in a mode of rotating the adjusting piece, the whole structure is simple, the operation is convenient, the accuracy of the system can be guaranteed, and the off-axis optical system is suitable for the use of the small near-to-eye display equipment.
Drawings
In order to more clearly illustrate the embodiments of the present specification or the technical solutions in the prior art, the drawings needed to be used in the description of the embodiments or the prior art will be briefly described below, it is obvious that the drawings in the following description are only some embodiments described in the embodiments of the present specification, and other drawings can be obtained by those skilled in the art according to the drawings.
FIG. 1 is a block diagram of an off-axis optical system in an embodiment of the present disclosure;
FIG. 2 is an exploded view of an off-axis optical system in an embodiment of the present disclosure;
FIG. 3 is a cross-sectional block diagram of an off-axis optical system in an embodiment of the present disclosure;
FIG. 4 is a block diagram of another perspective of an off-axis optical system in an embodiment of the present disclosure;
FIG. 5 is a bottom view of a first optic in an embodiment of the disclosure;
FIG. 6 is a top view block diagram of a second optic in an embodiment of the present disclosure;
FIG. 7 is a top view block diagram of an adjustment member in an embodiment of the present disclosure;
FIG. 8 is a block diagram of an off-axis optical system in another embodiment of the present disclosure;
FIG. 9 is an exploded view of an off-axis optical system in another embodiment of the present disclosure;
FIG. 10 is a cross-sectional block diagram of an off-axis optical system in another embodiment of the present disclosure.
Reference numerals:
1. a first optical member; s1, a first central shaft; 100. a first barrel; 100A, a first barrel housing section; 100B, a first barrel connecting part; 101. a first surface; 102. a guide groove; 103. a limiting groove; 104. a first opposing end; 105. a through hole; 106. a first lateral extension; 107. a first longitudinal extension; 2. a second optical member; s2, a second central axis; 200. a second barrel; 200A, a second barrel housing section; 200B, a second barrel connecting part; 201. a second surface; 202. a guide groove; 203. a chute; 204. a second opposite end; 205. a through hole; 206. a second lateral extension; 207. a second longitudinally extending portion; 3. an adjustment member; 301. a first support surface; 302. a second support surface; 303. a protrusion; 304. a first groove; 305. a screw; 306. a second groove; 4. and a support sleeve.
Detailed Description
In order to make the objects, technical solutions and advantages of the embodiments of the present application clearer, the technical solutions in the embodiments of the present application will be clearly and completely described below with reference to the drawings in the embodiments of the present application, and it is obvious that the described embodiments are some embodiments of the present application, but not all 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 application.
In the description of the embodiments of the present disclosure, it should be noted that, unless otherwise explicitly stated or limited, the term "connected" should be interpreted broadly, and may be, for example, a fixed connection, a detachable connection, or an integral connection, which may be a mechanical connection, an electrical connection, which may be a direct connection, or an indirect connection via an intermediate medium. The specific meaning of the above terms in this patent may be understood by those of ordinary skill in the art as appropriate.
The terms "top," "bottom," "above … …," "below," and "on … …" as used throughout the description are relative positions with respect to components of the device, such as the relative positions of the top and bottom substrates inside the device. It will be appreciated that the devices are multifunctional, regardless of their orientation in space.
For the purpose of facilitating understanding of the embodiments of the present application, the following description will be made in terms of specific embodiments with reference to the accompanying drawings, which are not intended to limit the embodiments of the present application.
Example 1
An off-axis optical system is provided as shown in FIGS. 1-7.
The off-axis optical system includes a first optical member 1, a second optical member 2, and an adjusting member 3.
The first optical element 1 has a first central axis S1 (see fig. 3), the first optical element 1 is rotationally symmetrical about the first central axis S1 and is fixed in position in a direction rotating about the first central axis S1; the first central axis S1 can define a first optical axis, the first central axis S1 is not coincident with the first optical axis, and the first optical element 1 is disposed off-axis.
As shown in fig. 1 to 3, the first optical member 1 includes a first lens (not shown) and a first barrel 100, the first barrel 100 is connected to the first lens, the first lens is disposed inside the first barrel 100, the first barrel 100 supports and fixes the first lens, and the first lens may be a single lens, a positive-negative cemented lens, or a lens group. The first optic is for defining a first optical axis.
The first optical element 1 further includes a first surface 101, and referring to the orientation shown in fig. 1 and fig. 2, the first surface 101 is located on the bottom surface of the first barrel 100, and the first surface 101 is perpendicular to the first central axis S1. The first lens barrel 100 includes a cylindrical receiving portion 100A and an annular connecting portion 100B, the receiving portion 100A is used for receiving a first lens and defining a position of the first lens, the connecting portion 100B is sleeved outside the receiving portion 100A, and a lower end of the receiving portion 100A may be disposed beyond the connecting portion 100B or may be flush with the connecting portion 100B. The first surface 101 is a lower surface of the annular connecting portion 100B.
Further, as shown in fig. 5, a plurality of arc-shaped guide grooves 102 and a plurality of arc-shaped stopper grooves 103 are provided on the first surface 101. Preferably, the plurality of guide grooves 102 and the plurality of stopper grooves 103 are disposed correspondingly, and the plurality of guide grooves 102 and the plurality of stopper grooves 103 are respectively and uniformly disposed along the same circumference of the annular connection portion 100B. The limiting groove 103 is a blind groove, and the limiting groove 103 is provided with a top surface and a side wall for limiting the part of the adjusting part 3 (see the protrusion 303 shown in fig. 7) extending into the limiting groove 103, thereby limiting the rotation range of the adjusting part 3. A guide groove 102 is arranged above the limiting groove 103, the guide groove 102 is a screw through hole groove, and the guide groove 102 is partially overlapped with the limiting groove 103. The guide groove 102 is used for passing through a screw 305 to fix the first optical element 1 and the adjusting element 3.
Still further, as shown in fig. 5, the length of the guide groove 102 is greater than the length of the limiting groove 103, and the width of the guide groove 102 is smaller than the width of the limiting groove 103.
Because of the delicate optical requirements of the off-axis optical system, a small deviation can have a large effect on the final result, so it is important that the off-axis optical system is stable and fixed in a proper position.
The second optical element 2 has a second central axis S2 (see fig. 3), the second optical element 2 is rotationally symmetrical about the second central axis S2 and is fixed in position in a direction rotating about the first central axis S1; the second central axis S2 can define a second optical axis, the second central axis S2 being non-coincident with the second optical axis, the second optic 2 being disposed off-axis.
As shown in fig. 1 to 3, the second optical member 2 includes a second lens (not shown) and a second barrel 200, the second barrel 200 is connected to the second lens, the second barrel 200 is used for accommodating the second lens, the second barrel 200 supports and fixes the second lens, and the second lens may be a single lens, a positive-negative cemented lens, or a lens group. The second lens is used for defining a second optical axis.
The first central axis S1 and the second central axis S2 have an initial angle therebetween; the first and second optical axes are disposed off-axis and at an angle to each other.
The second optical element 2 includes a second surface 201, referring to the orientation shown in fig. 1 and 2, the second surface 201 is located on the top surface of the second barrel 200, and the second surface 201 is perpendicular to the second central axis S2. The second barrel 200 includes a cylindrical receiving portion 200A and an annular connecting portion 200B, the receiving portion 200A is used for receiving a second lens and defining a position of the second lens, the connecting portion 200B is sleeved outside the receiving portion 200A, and an upper end of the receiving portion 200A may be disposed beyond the connecting portion 200B and may be flush with the connecting portion 200B. The second surface 201 is an upper surface of the annular connection portion 200B. The first surface 101 and the second surface 201 have a certain inclination angle therebetween.
Further, as shown in fig. 6, an annular sliding groove 203 and a plurality of arc-shaped guide grooves 202 are provided on the second surface 201, the plurality of arc-shaped guide grooves 202 are uniformly arranged along the same circumference, and the guide grooves 202 are screw through-holes for passing screws 305, so that the second optical element 2 and the adjusting element 3 are fixed by the screws 305; the sliding groove 203 serves to guide the rotation direction of the adjusting member 3 while accommodating the lower surface (i.e., the second supporting surface 302) of the adjusting member 3.
Because of the delicate optical requirements of the off-axis optical system, a small deviation can have a large effect on the final result, so it is important that the off-axis optical system is stable and fixed in a proper position.
As shown in fig. 1 and 2, the adjuster 3 is interposed between the first optical element 1 and the second optical element 2 and is rotatably disposed between the first optical element 1 and the second optical element 2, the adjuster 3 is annular and has a rotation axis S3, and the rotation axis S3 is coaxial with the second central axis S2 and obliquely intersects the first central axis S2. The interior of the adjusting member 3 has a space for receiving light therethrough, and the adjusting member 3 is adapted to the first optical member 1 and the second optical member 2.
Further, the adjusting member 3 is disposed below the first optical member 1 and above the second optical member 2, and includes a first supporting surface 301 and a second supporting surface 302. The first supporting surface 301 is located on the top surface of the adjusting member 3, and the second supporting surface 302 is located on the bottom surface of the adjusting member 3, which are not parallel to each other and have a certain inclination angle. The first supporting surface 301 is obliquely intersected with the rotating shaft S3 and is not vertical; the second supporting surface 302 is perpendicular to the rotation axis S3.
The adjusting member 3 is arranged in the above manner, during the rotation of the adjusting member 3, the rotation axis S3 of the adjusting member 3 is always coaxial with the second central axis S2, and since the initial included angle exists between the rotation axis S3 and the first central axis S1, when the inclination angle and the orientation of the first supporting surface relative to the rotation axis S3 are changed, the included angle between the first central axis S1 and the second central axis S2 is changed, and further the included angle between the first optical axis and the second optical axis is changed. The adjustment range of the included angle between the first optical axis and the second optical axis is below 3 degrees, and preferably, less than 1 degree or 0.1 degree.
The adjusting member 3 is connected to the first optical member 1 and the second optical member 2. The first surface 101 and the second surface 201 are respectively provided with a guide groove 102 corresponding to a first support surface 301 and a second support surface 302 of the adjusting member 3.
Further, the portion of the first optical member 1 passing through the first barrel 100 and located below the first barrel 100 will be placed in the hollow portion of the ring structure of the adjusting member 3. The upper surface of the adjusting member 3 is to be in contact with the lower surface of the first optical member 1, and the contact portion thereof includes a continuous flat surface, in other words, the first supporting surface 301 is connected to the first optical member 1 and supports the first optical member 1 obliquely.
The first supporting surface 301 is defined by a plurality of supporting points, the supporting points support the first optical element 1 at a plurality of positions, the supporting points comprise protrusions 303, the protrusions 303 extend from the adjusting element 3 to the first surface 101 of the first optical element 1, correspondingly, the notch of the limiting groove 103 of the first optical element 1 faces the protrusions 303, the groove bottom of the limiting groove 103 abuts against the supporting points, and the side walls of the limiting groove 103 define the movement range of the supporting points when the adjusting element 3 rotates. The protrusions 303 are to be received in a plurality of retaining grooves 103 of the first surface 101, the first supporting surface 301 comprises a top surface of the protrusions 303, the retaining grooves 103 are shaped to match a path of rotation of the protrusions 303, and the retaining grooves 103 guide a path of rotation of the adjusting member 3. Through the cooperation between above-mentioned arch 303 and the spacing groove 103 be connected, a plurality of strong points are in order to support in a plurality of positions first optical member 1, and then the entire system's that makes structure is more stable for it is more steady when sliding with regulating part 3, and then make the result after the adjustment more accurate.
When the adjusting member 3 rotates, the protrusion 303 on the first supporting surface 301 slides in the limiting groove 103 of the first barrel 100. The limit groove 103 is used to guide a rotation path of the adjusting member 3 and limit a rotation range of the adjusting member 3. The position of the inclined surface of the first supporting surface 301 changes along with the rotation of the adjusting member 3, and the first optical member 1 is attached to the first supporting surface 301 by the inclination in the direction away from or close to the second optical member 2.
Still further, the part of the second optical member 2 passing through the second barrel 200 and located above the second barrel 200 will be placed in the hollow part of the ring structure of the adjusting member 3. The lower surface of the adjusting member 3 will contact the upper surface of the second optical member 2, in other words, the second supporting surface 302 is connected to the second optical member 2, and the second optical member 2 does not rotate with the rotation of the adjusting member 3. The portion of the second surface 201 contacting and fitting with the second supporting surface 302 is a plane, and the adjusting member 3 can rotate along the second surface 201. Specifically, during the rotation of the adjusting member 3, the second supporting surface 302 rotates in the sliding groove 203 without exceeding the sliding groove 203, and the axis around which the adjusting member 3 rotates is perpendicular to the second surface 201. The second surface 201 and the first surface 101 have a certain inclination angle therebetween. The sliding groove 203 limits the moving path and the moving range of the adjusting member 3, the sliding groove 203 corresponds to the rotating track of the adjusting member 3, and the inclination direction of the first optical member 1 relative to the second optical member 2 changes continuously and linearly when the adjusting member 3 is adjusted rotationally.
Specifically, for the first optical element 1, due to the adhesion with the first supporting surface 301, when the adjusting element 3 rotates to drive the inclination angle of the first supporting surface 301 to change, the inclination angle of the first optical element 1 changes correspondingly along with the inclination angle of the first supporting surface 301, so as to change the inclination angle of the first central axis S1 relative to the second central axis S2. The second optical element 2 is attached to the second supporting surface 302, the position of the second optical element 2 is fixed, and when the adjusting member 3 is rotated, the position and the inclination angle of the second optical element 2 do not change, and accordingly, the second central axis S2 does not change. Therefore, when the adjusting member 3 rotates, the second optical member 2 is not changed due to the change of the inclination angle of the first optical member 1, so as to change the included angle between the first central axis S1 and the second central axis S2, thereby changing the included angle between the first optical axis and the second optical axis to meet the optical requirement.
Illustratively, in the embodiment shown in fig. 2, the adjusting member 3 is a tapered wedge-shaped cylinder, and the first supporting surface 301 is provided with 3 protrusions 303, and the protrusions 303 are uniformly distributed along the annular first supporting surface 301. The protrusion 303 extends from the adjustment member 3 towards the first surface 101 of the first optical member 1. As shown in fig. 5, the first barrel 100 is provided with 3 identical limiting grooves 103 uniformly distributed along the same circumference of the first optical element 1, the notches of the limiting grooves 103 face the protrusions 303, and the limiting grooves 103 are used for accommodating the protrusions 303. Referring to fig. 5 and 7, the shape of the protrusion 303 is adapted to the shape of the limiting groove 103 of the first optical element 1, so that the protrusion 303 can be just placed in the limiting groove 103, and the bottom of the limiting groove 103 abuts against the top of the protrusion 303. The shape of the stopper groove 103 matches the path of rotation of the projection 303 so that the projection 303 moves along the shape of the guide groove 103. The side walls of the stop groove 103 define the range of movement of the support point when the adjusting part 3 is rotated. So set up and to make the stable and accurate slip of regulating part.
Preferably, the width of the protrusion 303 is the same as the width of the limiting groove 103, and since the off-axis optical system is a very precise system, a small deviation will cause inaccuracy of the final result, so that the protrusion 303 can be effectively prevented from shaking back and forth in the limiting groove 103, and the whole system is more stable, so as to ensure the precision of the system.
The off-axis system further includes a retaining member operable to secure the first and second optics to the adjustment member through the guide slots, respectively. The locking member includes a guide groove 102, a screw 305, a first recess 304 provided on the top surface of the projection 303 and a second recess 306 provided on the bottom surface thereof (refer to fig. 7). The second recess 306 on the second support surface 302 corresponds to the first recess 304 on the protrusion 303 of the first support surface 301. And the first groove 304 is not communicated with the second groove 306.
For the connection relationship between the first optical element 1 and the adjusting element 3, the screw 305 passes through the limiting groove 102 from top to bottom (as shown in fig. 4), and is connected with the portion of the adjusting element 3 disposed in the guiding groove 103, and further, is connected with the first groove 304. For the connection relationship between the second optical element 2 and the adjusting element 3, the screw 305 passes through the guide slot 103 from bottom to top to connect with the second groove 306. Further, the position of the second optical element 2 is not changed by rotating the adjusting element 3, and the adjusting element 3 drives the first optical element 1 to change the orientation. When the adjusting member 3 rotates, the direction in which the first optical member 1 is tilted continuously and linearly changes. After the first optical element 1 and the second optical element 2 are adjusted to the fixed positions, the first optical element 1 and the adjusting element 3 and the second optical element 2 and the adjusting element 3 are fixed by a locking device. The whole off-axis optical system is more stable through the connection mode.
Illustratively, as shown in fig. 7, there are 3 protrusions 303 on the first supporting surface 301, and correspondingly, as shown in fig. 5, there are 3 identical limiting grooves 103 uniformly distributed along the same circumference of the first optical element 1 on the first barrel 100. The protrusion 303 is disposed in the limiting groove 103 of the first barrel 100, and when the adjusting member 3 rotates, the protrusion 303 on the first supporting surface 301 slides in the limiting groove 103 of the first barrel 100. The limit groove 103 is used to guide a rotation path of the adjusting member 3 and limit a rotation range of the adjusting member 3.
The system is suitable for fine adjustment of the angle between the first optical axis and the second optical axis, and is particularly suitable for fine adjustment of an optical system during installation. And adjusting the range of an included angle between the first optical axis and the second optical axis to be below 3 degrees. In such a small range, the system of the present disclosure can make the range of the included angle between the first optical axis and the second optical axis change within 3 degrees by rotating the adjusting member, which is more precise, and can realize accurate adjustment within 1 degree or even 0.1 degree. Thus, the angle between the tiny optically desirable optical axes is changed by operating in a comparatively larger range and amplitude. For example, for an adjustment member having a pitch angle of 4.42 degrees and a diameter of 56mm, the shaft angle may change by 0.03 degrees when the adjustment member is rotated by 6 degrees.
When the adjusting member 3 rotates to a certain angle to make the whole system meet the optical requirement, the screws 305 are used to fix and lock the first optical member 1 and the adjusting member 3 and the second optical member 2 and the adjusting member 3 respectively to complete the adjustment.
This is disclosed through the rotation regulation piece, drives first optical part and changes for the inclination of second optical part, and then adjusts the contained angle between the first optical axis of first optical part and the second optical axis of second optical part, makes it reach the optics requirement. The system provided by the disclosure is simple in structure, is suitable for precise adjustment of an optical system during installation, realizes tiny adjustment of an included angle between a first optical axis and a second optical axis according to rotation of a large-angle range of an adjusting piece, and can meet precise optical requirements through a simple operation mode.
Example 2
This embodiment provides an off-axis optical system, as shown in FIGS. 8-10.
The off-axis optical system includes a first optical member 1, a second optical member 2, an adjusting member 3, and a support sleeve 4.
The first optical element 1 has a first central axis S1 (see fig. 3), the first optical element 1 is rotationally symmetrical about the first central axis S1 and is fixed in position in a direction rotating about the first central axis S1; the first central axis S1 can define a first optical axis, the first central axis S1 is not coincident with the first optical axis, and the first optical element 1 is disposed off-axis.
As shown in fig. 8, the first optical member 1 includes a first lens (not shown) and a first barrel 100, the first barrel 100 is connected to the first lens, the first lens is disposed inside the first barrel 100, the first barrel 100 supports and fixes the first lens, and the first lens may be a single lens, a positive-negative cemented lens, or a lens group. The first optic is for defining a first optical axis.
As shown in fig. 9 and 10, the first optical member 1 includes a first opposite end 104, a first lateral extension 106, and a first longitudinal extension 107. The first opposite end 104 is located at the bottom end of the first barrel 100, opposite to the second optical element 2; the first opposite end 104 comprises a first lateral extension 106, the first lateral extension 106 extending outwardly from the side of the first barrel 100 of the first optical member 1, the first lateral extension 106 being perpendicular to the first central axis S1; the first lateral extension 106 is provided with a through hole 105, said through hole 105 being adapted to pass a screw 305. The through-hole 105 is an arc-shaped guide groove serving as a screw through-hole groove for defining a rotation range of the adjusting member 3. The first longitudinal extension 107 extends from the first lateral extension 106 in the direction of the first opposite end 104.
The second optical element 2 has a second central axis S2 (see fig. 3), the second optical element 2 is rotationally symmetrical about the second central axis S2 and is fixed in position in a direction rotating about the first central axis S1; the second central axis S2 can define a second optical axis, the second central axis S2 being non-coincident with the second optical axis, the second optic 2 being disposed off-axis.
As shown in fig. 8, the second optical member 2 includes a second lens (not shown) and a second barrel 200, the second barrel 200 is connected to the second lens, the second barrel 200 is used for accommodating the second lens, the second barrel 200 supports and fixes the second lens, and the second lens may be a single lens, a positive-negative cemented lens, or a lens group. The second lens is used for defining a second optical axis.
The first central axis S1 and the second central axis S2 have an initial angle therebetween; the first and second optical axes are disposed off-axis and at an angle to each other.
As shown in fig. 9 and 10, the second optic 2 includes a second opposing end 204, a second lateral extension 206, and a second longitudinal extension 207. A second opposite end 204 is located at the top end of the second barrel 200 and is opposite to the first optical element 1; the second lateral extension 206 extends from the side of the second barrel 200 of the second optical member 2 to the outside direction, and is provided with a through hole 205. The second longitudinal extension 207 extends from the second lateral extension 206 in the direction of the second opposing end 204. The through hole 205 is an arc-shaped guide groove serving as a screw through hole groove for defining a rotation range of the adjusting member 3. The first lateral extension 106 and the second lateral extension 206 are spaced apart from each other.
A support sleeve 4 interposed between the first optical member 1 and the second optical member 2, specifically, the support sleeve 4 is located below the first optical member 1 and above the second optical member 2, between the first lateral extension 106 and the second lateral extension 206. The supporting sleeve 4 is sleeved around the outer sides of the first longitudinal extending part 107 and the second longitudinal extending part 207; the support sleeve 4 is arranged fixed relative to the second optical element 2.
Referring to fig. 9, the support sleeve 4 is a sleeve having the same height or an inclined upper surface, the central axis of the support sleeve 4 is coaxial with the second central axis S2 of the second optical member 2, and there is no structural interference between the height of the support sleeve 4 and the height adjustment range of the adjustment member 3. Further, the structure of the support sleeve 4 is adapted to the structure of the first optical member 1 and the second optical member 2 at the same time, and the support sleeve 4 has a cavity therein for accommodation, which is enclosed outside the first longitudinal extension 107 and the second longitudinal extension 207. Meanwhile, the support sleeve 4 and the second optical element 2 are fixedly arranged relatively.
Referring to fig. 8 and 9, the adjusting member 3 is disposed between the first optical member 1 and the second optical member 2, and is fitted over the outer side of the support sleeve 4, and is supported by the support sleeve 4. The central axis of the support sleeve 4 is arranged coaxially with the rotation axis S3 of the adjusting member 3. Further, the adjustment member 3 is disposed between the first lateral extension 106 and the second lateral extension 206. The adjusting member 3 is sleeved around the outer sides of the first longitudinal extending portion 107 and the second longitudinal extending portion 207.
The adjusting member 3 comprises a first supporting surface 301 and a second supporting surface 302, wherein the first supporting surface 301 is located on the top surface of the adjusting member 3, and the second supporting surface 302 is located on the bottom surface of the adjusting member 3, which are not parallel to each other and form a certain inclination angle. The first 301 and second 302 support surfaces of the adjusting member 3 are at least partially in contact with the first 106 and second 206 lateral extensions, respectively. Furthermore, the first and second support surfaces 301, 302 of the adjusting member 3 in the longitudinal direction are at least partially in contact with the first and second lateral extensions 106, 206, respectively.
The adjusting member 3 is arranged in the above manner to change the included angle between the first central axis S1 and the second central axis S2 during the rotation of the adjusting member 3, thereby changing the included angle between the first optical axis and the second optical axis.
Furthermore, a ball is arranged between the adjacent surfaces of the adjusting piece 3 and the supporting sleeve 4, so that the adjusting piece 3 can rotate around the supporting sleeve 4 inside the adjusting piece, the angle of the first optical piece 1 is changed, and the inclination angle of the first optical piece is driven to change through the rotation adjustment of the adjusting piece 3, so that the optical requirement is met.
Further, the first supporting surface 301 includes a plurality of protrusions 303, and the plurality of protrusions 303 are disposed at positions corresponding to the through holes 105 formed in the first lateral extending portion 106. The protrusion 303 is provided with a first groove 304, and the first groove 304 is matched with the through hole 105. The through holes 105 on the first optical member 1 and the through holes 205 on the second optical member 2 have a number corresponding to the number of the projections 303, the diameter of which matches the diameter of the screw 305. Said through holes 105 are uniformly distributed along the first lateral extension 106, and are shaped to match the path of rotation of the projection 303, so as to guide and limit the path of rotation of said adjustment member 3.
The through hole 105 and the first groove 304 correspond to a screw 305; the through hole 205 and the second groove 306 correspond to the screw 305. The first recess 304 is located on the upper surface of the adjustment member and the second recess 306 is located on the lower surface of the adjustment member. The first groove 304 corresponds to the second groove 306, and is not communicated with the second groove. The second groove 306 is disposed at a position corresponding to the through hole 205 formed on the second lateral extension 206.
The first optical element 1 is connected to the adjusting element 3, and further, a screw 305 passes through the through hole 105 of the first lateral extending portion 106 from top to bottom to connect to the protrusion 303 of the adjusting element 3, and a part of the screw 305 is inserted into the first groove 304 to lock the first optical element 1 and the adjusting element 3.
In addition, the second optical element 2 is connected to the adjusting element 3, and further, a screw 305 passes through the through hole 205 on the second lateral extension 206 from bottom to top to connect to the adjusting element 3, and a part of the screw 305 is inserted into the second groove 306 to lock the second optical element 2 to the adjusting element 3.
When the adjusting piece 3 is rotated to adjust the angle, the adjusting piece 3 rotates around the supporting sleeve 4, and the relative position and state of the second optical piece are not changed in the rotating process of the adjusting piece 3, namely the second optical piece does not rotate along with the rotation of the adjusting piece 3. The first opposite end 104 undergoes a change in the angle of inclination within the support sleeve 4.
The rotation of the adjusting member 3 causes the first optical member 1 to tilt in a direction away from or toward the second optical member 2. Thereby changing the included angle between the first central axis S1 and the second central axis S2, and further changing the included angle formed by the first optical axis of the first optical element 1 and the second optical axis of the second optical element 2.
Similar to the first embodiment, the adjustment range of the included angle between the first optical axis and the second optical axis is below 3 degrees, and more precisely, accurate adjustment within 1 degree or even 0.1 degree can be realized. Thus, the angle between the tiny optically desirable optical axes is changed by operating in a comparatively larger range and amplitude.
When the adjusting member 3 rotates to a certain angle to make the whole system meet the optical requirement, the first optical member 1 and the adjusting member 3 and the second optical member and the adjusting member 3 are respectively fixed and locked by screws 305 to complete the adjustment.
The above-mentioned embodiments, objects, technical solutions and advantages of the present application are described in further detail, it should be understood that the above-mentioned embodiments are merely exemplary embodiments of the present application, and are not intended to limit the scope of the present application, and any modifications, equivalent substitutions, improvements and the like made within the spirit and principle of the present application should be included in the scope of the present application.
Claims (14)
1. An off-axis optical system, comprising:
a first optical member having a first central axis and defining a first optical axis;
a second optical member having a second central axis and defining a second optical axis; an included angle is formed between the first central shaft and the second central shaft, and the second optical axis and the first optical axis are arranged in an off-axis mode;
an adjusting member rotatably disposed between the first optical member and the second optical member; the adjusting piece comprises a first supporting surface and a second supporting surface; the first supporting surface is not parallel to the second supporting surface, so that the included angle between the first central shaft and the second central shaft is changed when the adjusting piece rotates, and therefore the included angle between the first optical axis and the second optical axis is adjusted.
2. The off-axis optical system as defined in claim 1,
the first optical member is fixed in position in a direction of rotation about the first center axis, and the second optical member is fixed in position in a direction of rotation about the second center axis.
3. The off-axis optical system as defined in claim 1,
when the position of the inclined plane of the first supporting surface changes due to the rotation of the adjusting piece, the first optical piece is attached to the first supporting surface through the inclination in the direction far away from or close to the second optical piece; the second supporting surface is connected with the second optical piece.
4. The off-axis optical system as defined in claim 1,
the first optical member includes a first surface, a portion of the first surface in contact with the first support surface includes a continuous flat surface, and an orientation of the first optical member inclined with respect to the second optical member changes continuously and linearly when the adjusting member is rotationally adjusted.
5. The off-axis optical system as defined in claim 4,
the first support surface is defined by a plurality of support points that support the first optic in a plurality of positions.
6. The off-axis optical system as defined in claim 5,
the support point includes a protrusion extending from the adjustment member toward the first surface of the first optical member;
the first surface includes a plurality of limiting grooves, and the limiting grooves accommodate the protrusions and guide a rotation path of the adjusting member.
7. The off-axis optical system as defined in claim 6,
the shape of the limiting groove is matched with the rotating path of the protrusion;
the notch of the limiting groove is opened towards the supporting point, the groove bottom of the limiting groove is abutted against the supporting point, and the side wall of the limiting groove limits the movement range of the supporting point when the adjusting piece rotates.
8. The off-axis optical system as defined in claim 4,
the second optic includes a second surface; the part of the second surface, which is in contact with the second supporting surface, is formed into a plane, and the adjusting piece rotates along the second surface; the second surface and the first surface have an inclination angle.
9. The off-axis optical system as defined in claim 8,
the second surface is provided with a chute for accommodating the second support surface and guiding the rotation of the second support surface.
10. The off-axis optical system as defined in claim 8,
the first surface and the second surface are respectively provided with a guide groove corresponding to a first supporting surface and a second supporting surface of the adjusting piece;
the off-axis optical system further includes a retaining member operable to secure the first and second optical members to the adjustment member through the guide slots, respectively.
11. The off-axis optical system as defined in claim 1,
and adjusting the range of an included angle between the first optical axis and the second optical axis to be below 3 degrees.
12. The off-axis optical system as defined in claim 1,
the first optical member includes
A first opposing end opposite the second optic; the first opposing end includes a first lateral extension extending outwardly from a side of the first optic;
the second optical member comprises
A second opposing end opposite the first optic; a second opposing end including a second lateral extension extending laterally from a side of the second optic in spaced relation to the first lateral extension;
the adjustment member is disposed between the first lateral extension and the second lateral extension; the first and second support surfaces of the adjustment member are at least partially in contact with the first and second lateral extensions, respectively.
13. The off-axis optical system of claim 12, further comprising a support sleeve disposed between the first and second laterally extending portions; the supporting sleeve and the second optical piece are oppositely and fixedly arranged;
the adjusting piece is sleeved on the outer side of the supporting sleeve, and a first supporting surface and a second supporting surface of the adjusting piece in the longitudinal direction are at least partially contacted with the first transverse extending portion and the second transverse extending portion respectively.
14. The off-axis optical system of claim 13 wherein a ball bearing is disposed between the adjacent surfaces of the adjustment member and the support sleeve.
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202111499932.1A CN114355543A (en) | 2021-12-09 | 2021-12-09 | Off-axis lens system |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202111499932.1A CN114355543A (en) | 2021-12-09 | 2021-12-09 | Off-axis lens system |
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| CN114355543A true CN114355543A (en) | 2022-04-15 |
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| Application Number | Title | Priority Date | Filing Date |
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| CN202111499932.1A Pending CN114355543A (en) | 2021-12-09 | 2021-12-09 | Off-axis lens system |
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