CN218585106U

CN218585106U - Device for adjusting coaxiality of lens and lens cone

Info

Publication number: CN218585106U
Application number: CN202122896034.1U
Authority: CN
Inventors: 陈雨曦; 柏佩宏
Original assignee: Maolai Nanjing Instrument Co ltd
Current assignee: Maolai Nanjing Instrument Co ltd
Priority date: 2021-11-24
Filing date: 2021-11-24
Publication date: 2023-03-07
Anticipated expiration: 2031-11-24

Abstract

The utility model discloses a device for adjusting the coaxiality of a lens and a lens cone, which comprises a reflection type center instrument, wherein the reflection type center instrument comprises an XY translation adjusting table and a turntable which is fixed on the XY translation adjusting table through a bearing, and a three-jaw chuck is fixedly connected on the turntable; the lens barrel to be installed and adjusted is fixed in the three-jaw chuck; the reflection type center instrument also comprises a light source, a reticle, a lens group and a camera, wherein the light source is fixed right above the lens cone; the lens base and the lens are sequentially placed in the lens barrel, the camera is connected with an external display screen through a data line, a reference cross line reticle is arranged on the front surface of the camera, and the position relation between the spherical center image of the lens displayed on the display screen and the image formed by the reference cross line reticle is realized. The utility model discloses whether the optical axis that the device can the snap judgments lens upper and lower surface is coaxial with the lens cone to lens position is adjusted in the adjusting hole through the lens cone side to the microscope base, has the characteristics of simple operation.

Description

Device for adjusting coaxiality of lens and lens cone

Technical Field

The utility model relates to a be used for adjusting coaxial device of lens and lens cone.

Background

The performance of an optical lens is largely influenced by the level of adjustment, in addition to the level of optical design, the design of the structural member, and the machining accuracy. Generally, for a lens with high precision requirement, a structure mode of firstly installing a lens base and then installing a lens barrel is adopted. The assembling and adjusting sequence is that the mechanical axis of the lens base is taken as a reference axis, the relative position of the lens and the lens base is adjusted, and then the lens base assembly is integrally assembled into the lens cone for adjustment. However, the conventional adjusting mode is quite dependent on the processing precision of the structural member, and once the processing precision of the structural member is not enough, the adjusting effect cannot meet the requirement.

SUMMERY OF THE UTILITY MODEL

Utility model purpose: the utility model aims at providing a be used for adjusting coaxial device of lens and lens cone.

The technical scheme is as follows: the utility model discloses a device for adjusting lens and lens cone are coaxial, including reflection-type centre appearance, reflection-type centre appearance includes XY translation adjusting station and fixes the carousel on XY translation adjusting station through the bearing, is linked firmly the three-jaw chuck on the carousel; the lens barrel to be installed and adjusted is fixed in the three-jaw chuck; the reflection type center instrument also comprises a light source, a reticle, a lens group and a camera, wherein the light source is fixed right above the lens cone; the lens base and the lens are sequentially placed in the lens barrel, the camera is connected with an external display screen through a data line, a reference cross line reticle is arranged on the front surface of the camera, and the position relation between the spherical center image of the lens displayed on the display screen and the image formed by the reference cross line reticle is realized.

The lens base is annular, an annular boss is arranged in the lens base, and the lens is placed on the annular boss of the lens base.

The lens base is positioned in the lens barrel in a shaft hole matching mode; the side wall of the lens cone at the corresponding position of the lens base is circumferentially provided with a plurality of adjusting holes, and the adjusting holes are symmetrically distributed on the side wall of the lens cone; each adjusting hole is provided with an adjusting screw matched with the adjusting hole.

The lens adjusting device comprises a lens barrel, a lens adjusting tool and an adjusting tool, wherein the adjusting tool is cylindrical, the length of the adjusting tool is larger than that of the lens barrel, one end of the adjusting tool extends out of the lens barrel, and the other end of the adjusting tool is located in the lens barrel to adjust the position of a lens.

The reflection type center instrument further comprises a lifting mechanism, wherein the lifting mechanism comprises a bottom plate, a motor fixed on the bottom plate, a ball screw fixedly connected with a motor driving shaft and a transmission plate in transmission connection with the ball screw; guide rails are arranged on two opposite sides of the bottom plate, a sliding block on the transmission plate moves upwards or downwards relative to the bottom plate along the guide rails, and the light source is fixed on the transmission plate; the bottom plate and the XY translation adjusting table are perpendicular to each other.

The focal plane of the lens group in the reflection type center instrument is superposed with the focal plane of the lens, the image of the reticle is formed at the position of the focal plane, the image of the reticle is reflected back by the lens and enters the camera through the beam splitting prism, and a cross-shaped image is formed in the display screen.

Has the beneficial effects that: the utility model discloses whether the optical axis that the device can the upper and lower surface of rapid judgement lens is coaxial with the lens cone to lens position is adjusted in the adjusting hole through the lens cone side to the microscope base, has convenient operation's characteristics. The device can realize that the lens passes over the lens base and is directly adjusted through the lens barrel, thereby reducing the dependence of the lens adjusting precision on the processing precision of the lens base.

Drawings

FIG. 1 is a schematic view of a lens holder and a lens placed in a lens barrel;

FIG. 2 is a schematic view of a lens adjusting structure using an adjusting tool;

FIG. 3 is a schematic diagram of the optical path of the centering device;

FIG. 4 is a schematic view of the structure of the device of the present invention;

FIG. 5 is a view of the center of the sphere of a lens in a display screen and the reticle.

Detailed Description

As shown in fig. 1 to 5, the device for adjusting the coaxiality of the lens and the lens cone of the present invention comprises a reflection type center instrument 30, wherein the reflection type center instrument 30 comprises an XY translation adjusting table 35 and a turntable 34 fixed on the XY translation adjusting table 35 through a bearing, and the turntable 34 is fixedly connected with a three-jaw chuck 33; the lens barrel 3 to be adjusted is fixed in the three-jaw chuck 33; the reflective centering device 30 further comprises a light source 31, a reticle 32, a lens group 29 and a camera 27, wherein the light source 31 is fixed right above the lens barrel 3; the lens base 5 and the lens 4 are sequentially placed in the lens barrel 3, the camera 27 is connected with an external display screen through a data line, a reference reticle 26 is arranged on the front surface of the camera 27, and the position relation between the spherical center image of the lens 4 (the spherical center image of the lens is a cross image 42 of the reticle 32 formed on the lens focal plane) displayed on the display screen and the image (cross image 41) formed by the reference reticle 26 is realized.

Wherein, microscope base 5 is the annular, is equipped with annular boss 9 in the microscope base 5, and lens 4 is placed on annular boss 9 of microscope base 5. The lens base 5 is positioned in the lens barrel 3 in a shaft hole matching mode; the side wall of the lens cone 3 at the corresponding position of the lens base 5 is provided with a plurality of adjusting holes 8 along the circumference, and the adjusting holes 8 are symmetrically distributed on the side wall of the lens cone 3; each adjusting hole 8 is provided with an adjusting screw 6 matched with the adjusting hole.

The utility model is used for adjusting coaxial device of lens and lens cone still is including adjusting frock 7, adjusts frock 7 and is the cylindricality, adjusts the length that frock 7 is greater than lens cone 3, and outside tip that adjusts frock 7 stretched out lens cone 3, another tip of adjusting frock 7 was located lens cone 3 and adjusts the position of lens 4.

The reflection type center instrument 30 further comprises a lifting mechanism, wherein the lifting mechanism comprises a bottom plate 36, a motor 37 fixed on the bottom plate 36, a ball screw 38 fixedly connected with a driving shaft of the motor 37 and a transmission plate 39 in transmission connection with the ball screw 38; the opposite two sides of the bottom plate 36 are provided with guide rails 40, the slide block 43 on the transmission plate 39 moves upwards or downwards relative to the bottom plate 36 along the guide rails 40, and the light source 31 is fixed on the transmission plate 39; the base plate 36 and the XY translation stage 35 are disposed perpendicular to each other.

Before assembly and adjustment, the plane of the turntable 34 is calibrated through the XY translation adjusting table 35, and the lens barrel 3 is clamped in the three-jaw chuck 33 after calibration, so that the mechanical axis of the lens barrel 3 is taken as a central reference; the lens base 5 and the lens 4 are sequentially arranged in the lens cone, and no glue is dispensed and fixed at the stage; adjusting the focus of a lens group 29 of the centering instrument to enable the focal plane of the lens group 29 to coincide with the focal plane of the lens 4, forming an image of the reticle 32 at the position of the focal plane 23, reflecting light rays by the lower surface of the lens 4 through the focus, namely reflecting the image of the reticle 32 by the lower surface of the lens 4, entering the camera 27 through the beam splitter prism 28, and obtaining a cross-shaped image 41 on the display screen; a reference reticle dividing plate 26 is arranged on the front surface of the camera 27, a cross image 41 displayed on a display screen by the reference reticle dividing plate 26 is used as a reference cross image, whether the center of the cross image 42 is overlapped with the center of the reference cross image 41 is observed to judge whether the optical axis of the lower surface of the lens 4 is coaxial with the mechanical axis of the lens barrel 3, if the cross image 42 is not overlapped with the center of the reference cross image 41, the position of the lens 4 in the lens barrel 3 is adjusted through an adjusting screw 6 on the side surface of the lens barrel 3 until the center of the cross image 42 is basically overlapped with the center of the reference cross image 41; at this time, the lens barrel 3 on the center instrument chuck is rotated (equivalent to rotating the lens barrel around the mechanical axis of the lens barrel) by rotating the turntable 34, the jumping condition of the cross-shaped image 41 is observed, the position of the lens 4 in the lens barrel 3 is continuously adjusted by the adjusting screw 6, and then the turntable 34 is rotated until the jumping of the cross-shaped image 41 is smaller than the off-axis requirement of the lens; taking out the lens 4, dispensing the side surface glue, putting the side surface glue into the lens barrel 3 again, finding out the spherical center image of the upper surface of the lens by adopting the mode, and adjusting the position of the spherical center image of the upper surface by using an adjusting tool until the spherical center image of the upper surface jumps to meet the off-axis requirement. After the runout of the spherical center images of the upper surface and the lower surface meets the off-axis requirement, the lens base 5 is subjected to glue dispensing through the side adjusting hole 8 of the lens barrel 3, and after the glue on the side surfaces of the lens base 5 and the lens 4 is cured, the adjustment is finished.

Claims

1. A device for adjusting a lens coaxial with a barrel, characterized in that: the device comprises a reflection type center instrument (30), wherein the reflection type center instrument (30) comprises an XY translation adjusting table (35) and a turntable (34) fixed on the XY translation adjusting table (35) through a bearing, and a three-jaw chuck (33) is fixedly connected onto the turntable (34); the lens barrel (3) to be adjusted is fixed in the three-jaw chuck (33); the reflection type center instrument (30) further comprises a light source (31), a reticle (32), a lens group (29) and a camera (27), wherein the light source (31) is fixed right above the lens barrel (3); the lens base (5) and the lens (4) are sequentially placed in the lens barrel (3), the camera (27) is connected with an external display screen through a data line, a reference cross line reticle (26) is arranged on the front surface of the camera (27), and the position relation between the spherical center image of the lens (4) displayed on the display screen and the image formed by the reference cross line reticle (26) is realized.

2. The device for adjusting the coaxiality of a lens and a barrel according to claim 1, wherein: the lens base (5) is annular, an annular boss (9) is arranged in the lens base (5), and the lens (4) is placed on the annular boss (9) of the lens base (5).

3. The apparatus for adjusting coaxiality of a lens and a barrel according to claim 1, wherein: the lens base (5) is positioned in the lens cone (3) in a shaft hole matching mode; the side wall of the lens cone (3) at the position corresponding to the lens base (5) is circumferentially provided with a plurality of adjusting holes (8), and the adjusting holes (8) are symmetrically distributed on the side wall of the lens cone (3); each adjusting hole (8) is provided with an adjusting screw (6) matched with the adjusting hole.

4. The device for adjusting the coaxiality of a lens and a barrel according to claim 1, wherein: the adjustable lens barrel is characterized by further comprising an adjusting tool (7), wherein the adjusting tool (7) is cylindrical, the length of the adjusting tool (7) is larger than that of the lens barrel (3), one end of the adjusting tool (7) extends out of the lens barrel (3), and the other end of the adjusting tool (7) is located in the lens barrel (3) to adjust the position of the lens (4).

5. The device for adjusting the coaxiality of a lens and a barrel according to claim 1, wherein: the reflection type center instrument (30) further comprises a lifting mechanism, wherein the lifting mechanism comprises a bottom plate (36), a motor (37) fixed on the bottom plate (36), a ball screw (38) fixedly connected with a driving shaft of the motor (37) and a transmission plate (39) in transmission connection with the ball screw (38); guide rails (40) are arranged on two opposite sides of the bottom plate (36), a sliding block (43) on the transmission plate (39) moves upwards or downwards relative to the bottom plate (36) along the guide rails (40), and the light source (31) is fixed on the transmission plate (39); the bottom plate (36) and the XY translation adjusting table (35) are arranged perpendicular to each other.

6. The device for adjusting the coaxiality of a lens and a barrel according to claim 1, wherein: the focal plane of a lens group (29) in the reflective centering instrument (30) coincides with the focal plane of the lens (4), the image of the reticle (32) is formed at the position of the focal plane, the image of the reticle (32) is reflected back by the lens (4) and enters the camera (27) through the beam splitter prism (28), and a cross-shaped image is formed in the display screen.