CN114355543B - Off-axis optical system - Google Patents
Off-axis optical system Download PDFInfo
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- CN114355543B CN114355543B CN202111499932.1A CN202111499932A CN114355543B CN 114355543 B CN114355543 B CN 114355543B CN 202111499932 A CN202111499932 A CN 202111499932A CN 114355543 B CN114355543 B CN 114355543B
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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
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Abstract
The invention discloses 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 shaft and the first optical shaft are arranged off-axis; 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 the included angle between the first central shaft and the second central shaft when the adjusting piece rotates, thereby adjusting the included angle between the first optical axis and the second optical axis. 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, 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 present disclosure pertains to the field of optics, and in particular, to an off-axis optical system.
Background
In optics, the optics have an imaginary line along which the propagation path of the light rays coincides when the light rays are injected into the optics, this imaginary line being called the optical axis.
In an optical system or optical assembly, which typically includes a plurality of optical devices, in some optical systems of the prior art, the optical axis of each optical device coincides with the mechanical center of the optical device, known as an on-axis optical system, but there are optical systems in the prior art in which the optical axis is separated from the mechanical center, such systems being known as off-axis optical systems.
Off-axis optical systems have wide applications, for example, in near-eye display devices, in order to achieve a variety of display parameters such as viewing angle and image quality, off-axis optical systems may be used. For the off-axis optical system, the angle of the lens leaving the optical axis needs to be assembled very accurately, the optical axis included angles among a plurality of lenses arranged off-axis need to strictly meet the design requirement, and even if the included angles among different lenses have extremely small errors, the final display effect of the optical module is greatly influenced.
Disclosure of Invention
The present disclosure is made based on the above-mentioned needs of the prior art, and the technical problem to be solved by the present disclosure is to provide an off-axis optical system, in which an adjusting member is disposed between two optical members, and the angle between the two optical members is adjusted by rotating the adjusting member, so as to meet the optical requirements and ensure the accuracy of the system.
In order to solve the above problems, the technical solution provided by the present disclosure includes:
There is provided 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 off-axis; an adjustment member rotatably disposed between the first optical member and the second optical member; the adjusting piece is provided with a rotating shaft, and the rotating shaft is intersected with the first central shaft and coaxial with the second central shaft; 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 supporting surface is obliquely intersected with the rotating shaft, the second supporting surface is perpendicular to the rotating shaft, and the first supporting surface and the second supporting surface are not parallel, so that an included angle between the first central shaft and the second central shaft is changed when the adjusting piece rotates, and the included angle between the first optical shaft and the second optical shaft is adjusted. The included angle between the first optical axis in the first optical element and the second optical axis of the second optical element is adjusted by the rotary adjusting element so as to achieve the optical requirement.
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 first supporting surface is changed in position of the inclined surface due to rotation of the adjusting member, the first optical member is attached to the first supporting surface by being inclined in a direction away from or toward the second optical member; the second support surface is coupled to the second optic. The first optical piece is attached to the first supporting surface, and when the inclination angle of the first supporting surface changes, the first optical piece is driven to incline, so that the inclination angle of the first optical axis changes. The first support surface provides support for the first optic so that the overall structure is more stable.
Preferably, the first optical member includes a first surface perpendicular to the first central axis; the portion of the first surface in contact with the first support surface includes a continuous planar surface, and the orientation of the first optical element relative to the second optical element changes continuously linearly as the adjustment member is rotationally adjusted.
Preferably, the first support surface is defined by a plurality of support points that support the first optical member at a plurality of positions.
Preferably, the support point includes a protrusion extending from the adjustment member toward the first surface of the first optical member; the first surface comprises a plurality of limit grooves which accommodate the protrusions and guide the rotation path of the adjusting piece. The protrusion of the adjusting piece moves along the path of the limiting groove in the limiting groove of the first optical piece, the limiting groove provides guiding and limiting functions for the adjusting piece, and the whole system structure can be more stable through the protrusion and the limiting groove in a matched mode, so that unnecessary shaking is reduced, and the error of the system is increased.
Preferably, the shape of the limit groove is matched with the rotating path of the protrusion; the notch of the limiting groove is formed towards the supporting point, the bottom of the limiting groove is abutted to 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 so as to limit the rotating path of the adjusting piece, and meanwhile, the protrusions and the adjusting piece are prevented from sliding in the rotating process so as to influence the final adjusting result.
Preferably, the second optical member includes a second surface perpendicular to the second central axis; the contact part of the second surface and 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. The arrangement is such that in the rotation process of the adjusting member, the rotation axis of the adjusting member and the second central axis are always coaxial, and the angle of the first central axis relative to the second central axis is changed, so that the included angle between the first optical axis and the second optical axis is changed.
Preferably, the second surface is provided with a chute for receiving the second support surface and guiding the rotation of the second support 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 guide grooves corresponding to the first supporting surface and the second supporting surface of the adjusting piece; the off-axis optical system further includes a locking member operable to secure the first and second optical members, respectively, to the adjustment member through the guide slot. The arrangement is such that the angle between the adjusted first optical axis and the second optical axis is fixed and unchanged, so as to achieve the optical requirement constantly.
Preferably, the range of the included angle between the first optical axis and the second optical axis is adjusted to be below 3 degrees.
Preferably, the first optical element comprises a first opposite end, the first opposite end being opposite the second optical element; the first opposite end includes a first lateral extension extending outwardly from a side of the first optic; the second optic includes a second opposite end opposite the first optic; the second opposite end includes a second lateral extension extending laterally from a side of the second optic, spaced apart from the first lateral extension; the adjustment member is disposed between the first and second lateral extensions; the first and second bearing 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 and the second transverse extension; the support sleeve and the second optical piece are arranged relatively fixedly; the adjusting piece is sleeved on the outer side of the supporting sleeve, and the first supporting surface and the second supporting surface of the adjusting piece are respectively and at least partially contacted with the first transverse extension part and the second transverse extension part.
Preferably, balls are arranged between adjacent surfaces of the adjusting piece and the supporting sleeve. So arranged as to effect rotation of the adjustment member.
Compared with the prior art, the system of the disclosure 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 member in 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 ensured, and the off-axis optical system is suitable for the use of the near-eye display equipment with smaller volume.
Drawings
In order to more clearly illustrate the embodiments of the present description or the technical solutions in the prior art, the drawings that are required in the embodiments or the description of the prior art will be briefly described below, and it is obvious that the drawings in the following description are only some embodiments described in the embodiments of the present description, and other drawings may be obtained according to these drawings for a person having ordinary skill in the art.
FIG. 1 is a block diagram of an off-axis optical system in an embodiment of the present disclosure;
FIG. 2 is an exploded block diagram 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 view of an off-axis optical system in an embodiment of the present disclosure;
FIG. 5 is a bottom block diagram 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 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 block diagram 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 accommodating section; 100B, first barrel connecting portion; 101. a first surface; 102. a guide groove; 103. a limit groove; 104. a first opposite end; 105. a through hole; 106. a first lateral extension; 107. a first longitudinal extension; 2. a second optical member; s2, a second central shaft; 200. a second barrel; 200A, a second barrel accommodating section; 200B, a second barrel connecting portion; 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 longitudinal extension; 3. an adjusting 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 supporting sleeve.
Detailed Description
For the purpose of making the objects, technical solutions and advantages of the embodiments of the present application more apparent, the technical solutions of the embodiments of the present application will be clearly and completely described below with reference to the accompanying drawings in the embodiments of the present application, and it is apparent that the described embodiments are some embodiments of the present application, but not all embodiments of the present application. All other embodiments, which can be made by those skilled in the art based on the embodiments of the application without making any inventive effort, are intended to be within the scope of the application.
In describing the embodiments of the present disclosure, it should be noted that, unless explicitly stated and limited otherwise, the term "connected" should be construed broadly, for example, it may be a fixed connection, a detachable connection, or an integral connection, a mechanical connection, an electrical connection, a direct connection, or an indirect connection via an intermediary. The specific meaning of the terms in this patent will be understood by those of ordinary skill in the art as the case may be.
The terms "top," "bottom," "above … …," "below," and "on … …" are used throughout to describe 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 versatile, irrespective of their orientation in space.
For the purpose of facilitating an understanding of the embodiments of the present application, reference will now be made to the following description of specific embodiments, taken in conjunction with the accompanying drawings, which are not intended to limit the embodiments of the application.
Example 1
An off-axis optical system is provided as shown in fig. 1-7.
The off-axis optical system comprises a first optical element 1, a second optical element 2 and an adjusting element 3.
The first optical member 1 has a first central axis S1 (see fig. 3), and the first optical member 1 is rotationally symmetrical about the first central axis S1 and is fixed in position in a direction of rotation about the first central axis S1; the first central axis S1 can define a first optical axis, the first central axis S1 being non-coincident with the first optical axis, the first optical element 1 being 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, see the orientations shown in fig. 1 and 2, where the first surface 101 is located on the bottom surface of the first lens barrel 100, and the first surface 101 is perpendicular to the first central axis S1. The first lens barrel 100 includes a cylindrical accommodating portion 100A and an annular connecting portion 100B, the accommodating portion 100A is configured to accommodate a first lens and define a position of the first lens, the connecting portion 100B is sleeved outside the accommodating portion 100A, and a lower end of the accommodating portion 100A may be disposed beyond the connecting portion 100B or may be flush with the connecting portion 100B. The first surface 101 refers to the 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 limit grooves 103 are provided on the first surface 101. Preferably, the plurality of guide grooves 102 and the plurality of limit grooves 103 are disposed correspondingly, and the plurality of guide grooves 102 and the plurality of limit grooves 103 are disposed uniformly along the same circumference of the annular connecting portion 100B, respectively. The limit groove 103 is a blind groove, and the limit groove 103 is provided with a top surface and a side wall for defining a portion of the regulating member 3 extending into the limit groove 103 (see the boss 303 shown in fig. 7), thereby defining a rotation range of the regulating member 3. Above the limit groove 103, a guide groove 102 is provided, the guide groove 102 is a screw via groove, and the guide groove 102 partially coincides with the limit groove 103. The guide groove 102 is used for penetrating 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 limit groove 103, and the width of the guide groove 102 is smaller than the width of the limit groove 103.
Because of the precise optical requirements of the off-axis optical system, a small deviation can have a large impact on the end result, it is critical that the off-axis optical system be stable and fixed in place.
The second optical member 2 has a second central axis S2 (see fig. 3), and the second optical member 2 is rotationally symmetrical about the second central axis S2 and is fixed in position in a direction of rotation 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 optical element 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 being connected to the second lens, the second barrel 200 being for accommodating the second lens, the second barrel 200 supporting and fixing 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 configured to define a second optical axis.
An initial angle is formed between the first central axis S1 and the second central axis S2; the first optical axis and the second optical axis are disposed off-axis and also at an angle to each other.
The second optical member 2 includes a second surface 201, see the orientations shown in fig. 1 and 2, the second surface 201 being located on the top surface of the second barrel 200, the second surface 201 being perpendicular to the second central axis S2. The second lens barrel 200 includes a cylindrical accommodating portion 200A and an annular connecting portion 200B, the accommodating portion 200A is configured to accommodate the second lens and define a position of the second lens, the connecting portion 200B is sleeved outside the accommodating portion 200A, and an upper end of the accommodating portion 200A may be disposed beyond the connecting portion 200B or may be flush with the connecting portion 200B. The second surface 201 refers to an upper surface of the annular connecting 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 guiding grooves 202 are provided on the second surface 201, the plurality of arc-shaped guiding grooves 202 are uniformly provided along the same circumference, the guiding grooves 202 are screw through hole grooves for passing through screws 305, and the second optical element 2 and the adjusting element 3 are fixed by the screws 305; the sliding groove 203 is used for accommodating the lower surface (i.e., the second supporting surface 302) of the adjusting member 3 and guiding the rotation direction of the adjusting member 3.
Because of the precise optical requirements of the off-axis optical system, a small deviation can have a large impact on the end result, it is critical that the off-axis optical system be stable and fixed in place.
As shown in fig. 1 and 2, an adjusting member 3 is disposed intermediate the first optical member 1 and the second optical member 2 and is rotatably disposed between the first optical member 1 and the second optical member 2, the adjusting member 3 being annular and having a rotation axis S3, the rotation axis S3 being coaxial with the second central axis S2 and obliquely intersecting the first central axis S2. The interior of the adjusting element 3 has a space for receiving light, through which the adjusting element 3 is adapted to the first optical element 1 and the second optical element 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, and the first supporting surface and the second supporting surface are not parallel to each other and form a certain inclination angle. The first supporting surface 301 is obliquely intersected with the rotation axis S3 and is not vertical; the second support surface 302 is perpendicular to the rotation axis S3.
The adjusting member 3 is arranged in the above manner, and in the rotation process of the adjusting member 3, the rotation axis S3 of the adjusting member 3 is always coaxial with the second central axis S2, and because an initial included angle exists between the rotation axis S3 and the first central axis S1, when the inclination angle and the azimuth of the first supporting surface relative to the rotation axis S3 change, the included angle between the first central axis S1 and the second central axis S2 is changed, and then 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, 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 guide grooves 102 corresponding to the first supporting surface 301 and the second supporting 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 annular structure of the regulating member 3. The upper surface of the regulating 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 to the protrusions 303, the bottom of the limiting groove 103 abuts against the supporting points, and the side walls of the limiting groove 103 limit the movement range of the supporting points when the adjusting element 3 rotates. The boss 303 is to be received in a plurality of limit grooves 103 of the first surface 101, the first support surface 301 includes a top surface of the boss 303, the limit groove 103 is shaped to match a path of rotation of the boss 303, and the limit groove 103 guides a rotational path of the regulating member 3. Through cooperation connection between above-mentioned protruding 303 and the spacing groove 103, a plurality of strong points are in order to support on a plurality of positions first optical piece 1, and then the structure of the entire system that makes is more stable for it is more steady when sliding the regulating part 3, and then makes 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 limit groove 103 of the first barrel 100. The limit groove 103 is used for guiding the rotation path of the adjusting member 3 and limiting the rotation range of the adjusting member 3. The first supporting surface 301 changes its position along with the rotation of the adjusting member 3, and the first optical member 1 is attached to the first supporting surface 301 by tilting in a direction away from or approaching the second optical member 2.
Still further, the portion 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 portion of the annular structure of the regulating member 3. The lower surface of the adjustment member 3 will be in contact with 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 adjustment member 3. The contact and contact part of the second surface 201 and the second supporting surface 302 is a plane, and the adjusting member 3 can rotate along the second surface 201. Specifically, during rotation of the adjustment member 3, the second support surface 302 rotates within the chute 203 without exceeding the chute 203, and the axis about which the adjustment 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, and the sliding groove 203 corresponds to the rotating track of the adjusting member 3, and the inclined direction of the first optical member 1 relative to the second optical member 2 continuously and linearly changes when the adjusting member 3 is rotationally adjusted.
Specifically, for the first optical element 1, due to the adhesion between the first optical element 1 and 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 element 3 rotates, 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 unchanged 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 achieve the optical requirement.
Illustratively, in the embodiment shown in fig. 2, the adjusting member 3 is a tapered 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 regulating member 3 toward the first surface 101 of the first optical member 1. As shown in fig. 5, the first lens barrel 100 is provided with 3 identical limiting grooves 103 uniformly distributed along the same circumference of the first optical member 1, the notch of the limiting grooves 103 faces the protrusion 303, and the limiting grooves 103 are used for accommodating the protrusion 303. Referring to fig. 5 and 7, the shape of the protrusion 303 is adapted to the shape of the limit groove 103 of the first optical member 1, so that the protrusion 303 can be just placed in the limit groove 103, and the bottom of the limit groove 103 abuts against the top of the protrusion 303. The shape of the limit groove 103 matches the path of rotation of the boss 303 so that the boss 303 moves along the shape of the guide groove 103. The side walls of the limit groove 103 define the movement range of the supporting point when the adjusting member 3 rotates. The setting can make the stable and accurate slip of regulating part.
Preferably, the width of the protrusion 303 is the same as the width of the limit groove 103, and since the off-axis optical system is a very precise system, a small deviation can lead to inaccuracy of the final result, and thus the protrusion 303 can be effectively prevented from shaking back and forth in the limit groove 103, so that the whole system is more stable, and the precision of the system is ensured.
The off-axis system further includes a locking member operable to secure the first and second optical members, respectively, to the adjustment member through the guide slot. The locking member includes a guide groove 102, a screw 305, a first groove 304 provided on the top surface of the boss 303, and a second groove 306 (refer to fig. 7) on the bottom surface thereof. 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 and the second groove 306 do not communicate.
For the connection between the first optical member 1 and the adjusting member 3, the screw 305 passes through the limit groove 102 from top to bottom (as shown in fig. 4), and is connected to the portion of the adjusting member 3 placed in the guide groove 103, and further, is connected to the first groove 304. For the connection between the second optical element 2 and the adjusting element 3, the screw 305 passes through the guiding slot 103 from bottom to top and is connected 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 direction of the first optical element 1 is changed by the adjusting element 3. When the regulating member 3 is rotated, the direction of inclination of the first optical member 1 is continuously linearly changed. 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 respectively fixed by a locking device. The whole off-axis optical system is more stable through the connecting mode.
For example, as shown in fig. 7, there are 3 protrusions 303 on the first supporting surface 301, and correspondingly, as shown in fig. 5, 3 identical limiting grooves 103 uniformly distributed along the same circumference of the first optical member 1 are provided on the first lens barrel 100. The protrusion 303 is placed in the limit groove 103 of the first barrel 100, and when the adjusting member 3 rotates, the protrusion 303 of the first supporting surface 301 slides in the limit groove 103 of the first barrel 100. The limit groove 103 is used for guiding the rotation path of the adjusting member 3 and limiting the 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 precise adjustment of the optical system during installation. And adjusting the included angle between the first optical axis and the second optical axis to be less than 3 degrees. In such a minute range, the system of the present disclosure can change the range of the included angle between the first optical axis and the second optical axis within 3 degrees by rotating the adjusting member, which is finer, and can achieve accurate adjustment within 1 degree or even 0.1 degree. Thus, the angle between the tiny optically satisfactory optical axes is changed by operating over 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.
After the adjusting member 3 is rotated to a certain angle so that the whole system meets the optical requirement, the first optical member 1 and the adjusting member 3 and the second optical member 2 and the adjusting member 3 are respectively and fixedly locked by using screws 305 to complete the adjustment.
According to the optical system, the inclination angle of the first optical piece relative to the second optical piece is driven to change by rotating the adjusting piece, so that the included angle between the first optical axis of the first optical piece and the second optical axis of the second optical piece is adjusted, and the optical requirement is met. The system provided by the disclosure has a simple 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 concise operation mode.
Example 2
This embodiment provides an off-axis optical system as shown in fig. 8-10.
The off-axis optical system comprises a first optical element 1, a second optical element 2, an adjusting element 3 and a support sleeve 4.
The first optical member 1 has a first central axis S1 (see fig. 3), and the first optical member 1 is rotationally symmetrical about the first central axis S1 and is fixed in position in a direction of rotation about the first central axis S1; the first central axis S1 can define a first optical axis, the first central axis S1 being non-coincident with the first optical axis, the first optical element 1 being disposed off-axis.
As shown in fig. 8, the first optical member 1 includes a first lens (not shown) and a first lens barrel 100, the first lens barrel 100 is connected to the first lens, the first lens is disposed inside the first lens barrel 100, the first lens 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 element 1 comprises 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 lens barrel 100, opposite to the second optical element 2; the first opposite end 104 comprises a first lateral extension 106, said first lateral extension 106 extending outwardly from a 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 intended to pass a screw 305. The through hole 105 is an arc-shaped guide groove serving as a screw through hole groove for limiting the rotation range of the regulating 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 member 2 has a second central axis S2 (see fig. 3), and the second optical member 2 is rotationally symmetrical about the second central axis S2 and is fixed in position in a direction of rotation 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 optical element 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 configured to define a second optical axis.
An initial angle is formed between the first central axis S1 and the second central axis S2; the first optical axis and the second optical axis are disposed off-axis and also at an angle to each other.
As shown in fig. 9 and 10, the second optical element 2 includes a second opposite end 204, a second lateral extension 206, and a second longitudinal extension 207. The second opposite end 204 is located at the top end of the second lens barrel 200 and is opposite to the first optical element 1; the second lateral extension 206 extends in an outward direction from the side surface of the second barrel 200 of the second optical member 2, 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 opposite end 204. The through hole 205 is an arc-shaped guide groove serving as a screw through hole groove for limiting the rotation range of the regulating member 3. The first lateral extension 106 and the second lateral extension 206 are spaced apart from each other.
A support sleeve 4 is interposed between the first optical member 1 and the second optical member 2, in particular, 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 support sleeve 4 is sleeved around the outer sides of the first and second longitudinal extension parts 107 and 207; the support sleeve 4 is arranged in a fixed manner relative to the second optical element 2.
Referring to fig. 9, the support sleeve 4 is a sleeve having a constant 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 structures of the first optical element 1 and the second optical element 2 at the same time, and the support sleeve 4 is internally provided with a chamber for accommodating, and the chamber is enclosed outside the first longitudinal extension 107 and the second longitudinal extension 207. At the same time, the support sleeve 4 and the second optical element 2 are arranged in a relatively fixed manner.
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 sleeved outside the supporting sleeve 4, and is supported by the supporting 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 arranged between the first and second lateral extensions 106, 206. The adjustment member 3 is sleeved around the outer sides of the first and second longitudinal extensions 107, 207.
The adjusting member 3 includes a first supporting surface 301 and a second supporting surface 302, where 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, and the two surfaces are not parallel to each other and form a certain inclination angle. The first and second support surfaces 301, 302 of the adjustment member 3 are at least partially in contact with the first and second lateral extensions 106, 206, respectively. Furthermore, the first 301 and second 302 longitudinal support surfaces of the adjustment member 3 are at least partially in contact with the first 106 and second 206 lateral extensions, respectively.
The adjusting member 3 is arranged in the above manner to change the angle between the first central axis S1 and the second central axis S2 during rotation of the adjusting member 3, thereby changing the angle between the first optical axis and the second optical axis.
Further, a ball is disposed between the adjacent surfaces of the adjusting member 3 and the supporting sleeve 4, so that the adjusting member 3 can rotate around the supporting sleeve 4 inside the adjusting member, the angle of the first optical member 1 changes, and the inclination angle of the first optical member is driven to change by adjusting the rotation of the adjusting member 3, so as to meet the optical requirement.
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 laterally extending portion 106. The boss 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 plurality corresponding to the number of the bosses 303, and the diameters thereof match the diameters of the screws 305. The through holes 105 are uniformly distributed along the first lateral extension 106, and are shaped to match the rotation path of the protrusions 303, so as to guide and limit the rotation path of the regulating member 3.
The through hole 105 and the first groove 304 correspond to the screw 305; the through hole 205 and the second groove 306 correspond to the screw 305. The first groove 304 is located on the upper surface of the adjustment member, and the second groove 306 is located on the lower surface of the adjustment member. The first groove 304 corresponds to the second groove 306 and is not in communication. The second groove 306 is disposed at a position corresponding to the through hole 205 formed in the second lateral extension 206.
The first optical element 1 is connected with the adjusting element 3, further, a screw 305 penetrates through the through hole 105 on the first transverse extension 106 from top to bottom to be connected with the protrusion 303 on the adjusting element 3, and part of the screw 305 is embedded into the first groove 304 to lock the first optical element 1 with the adjusting element 3.
In addition, the second optical element 2 is connected with the adjusting element 3, and further, the second optical element 2 is connected with the adjusting element 3 through a through hole 205 passing through a second transverse extension 206 from bottom to top by a screw 305, and part of the screw 305 is embedded into the second groove 306 to lock the second optical element 2 with the adjusting element 3.
When the adjusting member 3 is rotated to perform angle adjustment, the adjusting member 3 rotates around the supporting sleeve 4, and the relative position and state of the second optical member do not change during the rotation of the adjusting member 3, i.e. do not rotate with the rotation of the adjusting member 3. The first opposite end 104 is inclined with respect to the support sleeve 4.
Rotation of the adjustment 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 less than 3 degrees, which is finer, and can achieve accurate adjustment within 1 degree or even 0.1 degree. Thus, the angle between the tiny optically satisfactory optical axes is changed by operating over a comparatively larger range and amplitude.
After the adjusting member 3 is rotated to a certain angle so that the whole system meets 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 and fixedly locked by using screws 305 to complete the adjustment.
The foregoing description of the embodiments has been provided for the purpose of illustrating the general principles of the application, and is not meant to limit the scope of the application, but to limit the application to the particular embodiments, and any modifications, equivalents, improvements, etc. that fall within the spirit and principles of the application are intended to be included within the scope of the application.
Claims (12)
1. An off-axis optical system, comprising:
A first optical member having a first central axis and defining a first optical axis, the first optical member including a first surface including a plurality of limiting grooves;
A second optical member having a second central axis and defining a second optical axis, the second optical member including a second surface; 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 off-axis;
An adjustment 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, wherein the first supporting surface is positioned on the top surface of the adjusting piece, the second supporting surface is positioned on the bottom surface of the adjusting piece, the first supporting surface is in contact with the first surface, and the second supporting surface is in contact with the second surface; the first supporting surface and the second supporting surface are not parallel, so that the included angle between the first central shaft and the second central shaft is changed when the adjusting piece rotates, and the included angle between the first optical axis and the second optical axis is adjusted; the first support surface is defined by a plurality of support points that support the first optical element at a plurality of positions; the support point comprises a protrusion extending from the adjusting member to the first surface, and the limit groove accommodates the protrusion and guides the rotating path of the adjusting member.
2. An off-axis optical system as defined in claim 1, wherein,
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.
3. An off-axis optical system as defined in claim 1, wherein,
When the first supporting surface is changed in the position of the inclined surface 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 away from or close to the second optical piece.
4. An off-axis optical system as defined in claim 1, wherein,
The portion of the first surface in contact with the first support surface includes a continuous planar surface, and the orientation of the first optical element relative to the second optical element changes continuously linearly as the adjustment member is rotationally adjusted.
5. An off-axis optical system as defined in claim 1, wherein,
The shape of the limiting groove is matched with the rotating path of the protrusion;
The notch of the limiting groove is formed towards the supporting point, the bottom of the limiting groove is abutted to the supporting point, and the side wall of the limiting groove limits the movement range of the supporting point when the adjusting piece rotates.
6. An off-axis optical system as defined in claim 1, wherein,
The second optic includes a second surface; the contact part of the second surface and 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.
7. An off-axis optical system as defined in claim 6, wherein,
The second surface is provided with a chute for receiving the second support surface and guiding the rotation of the second support surface.
8. An off-axis optical system as defined in claim 6, wherein,
The first surface and the second surface are respectively provided with guide grooves corresponding to the first supporting surface and the second supporting surface of the adjusting piece;
the off-axis optical system further includes a locking member operable to secure the first and second optical members, respectively, to the adjustment member through the guide slot.
9. An off-axis optical system as defined in claim 1, wherein,
The range of the included angle between the first optical axis and the second optical axis is adjusted to be below 3 degrees.
10. An off-axis optical system as defined in claim 1, wherein,
The first optical member includes
A first opposing end opposite the second optic; the first opposite end includes a first lateral extension extending outwardly from a side of the first optic;
The second optical member includes
A second opposite end opposite the first optic; the second opposite end includes a second lateral extension extending laterally from a side of the second optic, spaced apart from the first lateral extension;
The adjustment member is disposed between the first and second lateral extensions; the first and second bearing surfaces of the adjustment member are at least partially in contact with the first and second lateral extensions, respectively.
11. The off-axis optical system of claim 10, further comprising a support sleeve disposed between the first and second lateral extensions; the support sleeve and the second optical piece are arranged relatively fixedly;
The adjusting piece is sleeved on the outer side of the supporting sleeve, and the first supporting surface and the second supporting surface of the adjusting piece are respectively and at least partially contacted with the first transverse extension part and the second transverse extension part.
12. The off-axis optical system as recited in claim 11 wherein balls are disposed between adjacent surfaces of the adjustment member and the support sleeve.
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| CN202111499932.1A CN114355543B (en) | 2021-12-09 | 2021-12-09 | Off-axis optical system |
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| CN202111499932.1A CN114355543B (en) | 2021-12-09 | 2021-12-09 | Off-axis optical system |
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| CN114355543A (en) | 2022-04-15 |
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