CN206193319U - Mechanical structure for turning optical path optical system - Google Patents

Abstract

The utility model belongs to the field of optical precision instruments, and relates to a mechanical structure of a deflected light path optical system. The structure includes a folding mirror frame, a front mirror group, a rear mirror group and a flat mirror group; the folding mirror frame includes a vertical mirror barrel and a horizontal mirror barrel; the flat mirror group is installed on the vertical mirror barrel and the horizontal mirror The intersection of the tubes; the front lens group is installed in the vertical lens tube; the rear lens group is installed in the horizontal lens tube; the connecting lens tube is installed in the vertical lens tube or the horizontal lens tube; The plane reflector is fixed on the refraction mirror frame by means of the bonding column; the bonding glue of the plane reflector and the bonding column is filled with hollow glass beads; the structure of the utility model not only ensures the front mirror group Or the coaxiality adjustment precision of the rear mirror group is high, and the problem of mirror surface change of the plane reflector can be avoided.

Description

A Mechanical Structure of a Refracted Optical System

technical field

The utility model belongs to the field of optical precision instruments, and relates to a mechanical structure of a deflected light path optical system.

Background technique

In the design of optical instruments, according to the needs of the actual optical path, the position and direction of the optical axis of the system are often changed through the plane mirror. The adjustment of the attitude of the plane mirror is an important link in the adjustment of the optical system, and it is also a difficult point.

In the past, the structural design idea of the refraction optical path was to assemble the front mirror group and the rear mirror that have been optically centered and processed into the refraction mirror frame and not adjust it. The front and rear optical groups are coaxial through the adjustment of the plane mirror. This design idea It is feasible when the machining accuracy of the folding mirror frame is high, and the pose accuracy of the front and rear light groups is low, but it is difficult to guarantee the coaxial precision of the front and rear light groups. In addition, when the plane mirror is used as the adjustment link, the stress generated in the adjustment process often causes changes in the shape of the plane mirror, which will eventually lead to the deterioration of the wavefront of the system.

Utility model content

In order to solve the problems mentioned in the background technology, the utility model proposes a mechanical mechanism of the refraction optical path optical system with high coaxiality adjustment precision of the front mirror group or the rear mirror group, and which can avoid the mirror surface change of the plane reflector. structure.

The concrete technical scheme of the utility model is:

The utility model proposes a mechanical structure of a deflected light path optical system, including a deflected mirror frame, a front mirror group, a rear mirror group and a plane mirror group;

The folding mirror frame is formed by the intersection of the vertical lens barrel arranged vertically and the horizontal lens barrel arranged horizontally, and the plane reflector group is installed at the intersection of the vertical lens barrel and the horizontal lens barrel; the vertical lens barrel and the horizontal lens barrel The central axes of the horizontal lens barrels are coplanar and their intersection points are on the mirror surface of the plane reflector group;

The front lens group is installed in the vertical lens barrel; the rear lens group is installed in the horizontal lens barrel;

Its improvements are:

It also includes connecting screws, trimming pads, pressure rings and connecting lens barrels; the connecting lens barrels include cylinders and flanges arranged at the open ends of the cylinders; internal threads are engraved in the cylinder near the flanges; the The connecting screws pass through the flanging and the trimming pad in order to fix the connecting lens barrel in the vertical lens barrel or the horizontal lens barrel; the outer wall of the pressure ring is engraved with external threads; by connecting the external threads of the pressure ring with the barrel The internal thread of the body is adapted to press the front lens group or the rear lens group; the gap between the cylinder and the vertical lens barrel or between the cylinder and the horizontal lens barrel is all clearance fit; the barrel connecting the lens barrel A top screw hole is provided at the position where the front lens group is installed on the body; a small hole is provided at a position where the vertical lens barrel or the horizontal lens barrel that connects the lens barrel is installed relative to the top screw hole.

In addition, in order to make the plane mirror in place at one time and avoid the change of the plane mirror shape caused by using the plane mirror as an adjustment link, it is proposed that the plane mirror is glued at multiple points and the glue layer is controlled by hollow glass beads of different diameters. Gluing method of thickness; specifically: the plane reflector group is composed of plane reflector, adhesive column, tensioning screw, plane mirror base, plane mirror frame and fastening screw;

The plane reflector is installed in the plane mirror frame and is a clearance fit; the adhesive post is fixedly connected with the planar mirror base through tension screws; there are at least three adhesive posts; the planar reflector is glued to the end face of the adhesive post ; At least 3 adhesive posts are coplanar with the end faces of the plane mirror;

The flat mirror frame is matched with the flat mirror base, the flat mirror frame is matched with the folded mirror frame, and the fastening screws pass through the plane mirror base, and the plane mirror frame is fixedly connected with the folded mirror frame.

Hollow glass microspheres are filled in the bonding glue of the above-mentioned plane reflector and the bonding post.

The utility model has the advantages of:

1. The front mirror group or the rear mirror group of the utility model adopts a secondary connection, and the adjustment link is set at the secondary connection point, so that the front and rear mirror groups can be precisely adjusted through the adjustable link of the front mirror group or the rear mirror group. Coaxiality, even if there is a large position error in the mirror holes of the front and rear mirror groups of the folding frame, such as verticality, and even the error of different planes can be eliminated through the secondary connection adjustment link. Second, the change of the surface shape of the plane mirror caused by using the plane mirror as an adjustment link is avoided.

2. The plane reflector of the utility model adopts the structure mode of back-pull multi-point adhesive column, and the dispensing positions are distributed at the end faces of multiple detachable adhesive columns. First, the back-pull structure can realize the quick deglue of the plane reflector; second, the method of controlling the thickness of the adhesive layer through hollow glass beads of different diameters does not require additional positioning tools or measuring instruments when gluing , thus simplifying the bonding process; third, relying on the diameter of the hollow glass microspheres to ensure the thickness of the adhesive layer, which improves the precision of the adhesive layer control; fourth, by controlling the mixing ratio of the hollow glass microspheres and the glue, the bonding can be improved. strength.

Description of drawings

Fig. 1 is the structural representation of the utility model.

Fig. 2 is the exterior view of the utility model.

Fig. 3 is a schematic diagram of gluing the plane mirror of the present invention.

Fig. 4 is the principle diagram of the self-alignment piercing of the utility model.

The reference signs are as follows:

1-Fold mirror frame, 2-Front mirror group, 3-Rear mirror group, 4-Plane reflector group, 5-Vertical mirror tube, 6-Horizontal mirror tube, 7-First front mirror group, 8-First front spacer, 9-Second front mirror group, 10-Front spacer, 11-Third front mirror group, 12-Connecting flange, 13-Connecting screw, 14-Trim pad , 15-pressure ring, 16-connecting lens barrel, 17-cylinder body, 18-flange, 19-internal thread, 20-external thread, 21-top screw hole, 22-small hole, 23-hollow glass bead, 24-plane mirror, 25-adhesive post, 26-tension screw, 27-plane mirror base, 28-plane mirror frame, 29-fastening screw, 30-front lens, 31-front cross reticle, 32 - Theodolite.

detailed description

Referring to Figures 1-4, a mechanical structure of a folded light path optical system includes a folded mirror frame 1, a front mirror group 2, a rear mirror group 3 and a plane mirror group 4;

Fold mirror frame 1 is formed by the intersection of the vertical mirror barrel 5 of vertical arrangement and the horizontal mirror barrel 6 of horizontal arrangement, and the flat mirror group 4 is installed in the intersection of vertical mirror barrel 5 and horizontal mirror barrel 6; The central axis of straight lens barrel 5 and horizontal lens barrel 6 is coplanar and its intersection point is on the mirror surface of plane reflection group 4;

The front lens group 2 is installed in the vertical lens barrel 5; the rear lens group 3 is installed in the horizontal lens barrel 6;

The front mirror group 2 includes at least one mirror group, which is composed of three mirror groups here; specifically: the first front mirror group 7, the first front spacer 8, the second front mirror group installed from bottom to top. The front mirror group 9, the second front spacer 10, and the third front mirror group 11 are composed;

The outer cylindrical surface of the first front mirror group 7, the second front mirror group 8, and the third front mirror group 9 and the cylinder inner cylindrical surface of the vertical lens barrel 11 are clearance fits;

Wherein, the first front mirror group 7, the second front mirror group 8, and the third front mirror group 9 all include a front mirror 30 and a front cross reticle 31 installed in the front mirror 30;

The structure of the rear mirror group is the same as that of the front mirror group;

A connection flange 12 is provided at the right end of the horizontal lens barrel 6 of the folding mirror frame for connection with other optical components;

In order to make the coaxial adjustment accuracy of the front mirror group 2 and the rear mirror group 3 higher, and avoid the deformation of the mirror surface of the plane mirror when the plane mirror group is used as an adjustment link; the utility model adopts a secondary connection To fix the front mirror group or the rear mirror group;

The specific structure is: it also includes connecting screw 13, trimming pad 14, pressure ring 15 and connecting lens barrel 16; connecting lens barrel 16 includes cylinder body 17 and flange 18 arranged at the opening end of cylinder body 17; The position of the side 18 is engraved with an internal thread 19; the connecting screw 13 passes through the flange 18 and the trimming pad 14 in turn to fix the connecting lens barrel 16 in the vertical lens barrel 11 or the horizontal lens barrel 12; the outer wall of the pressure ring 15 An external thread 20 is engraved; the front lens group 2 or the rear lens group 3 are pressed tightly by matching the external thread 20 of the pressure ring 15 with the internal thread 19 of the cylinder body; the cylinder body 17 and the vertical lens barrel 5 There is clearance fit between the cylinder body 17 and the horizontal lens barrel 6; the position where the front lens group 2 is installed on the cylinder body 17 connecting the lens barrel 16 is provided with a top screw hole 21; A small hole 22 is opened at the position of the lens barrel 5 or the horizontal lens barrel 6 relative to the screw hole 21 .

In addition, in order to make the plane mirror in place at one time and avoid the change of the plane mirror surface shape caused by using the plane mirror as an adjustment link, it is proposed that the plane mirror be glued at multiple points and the glue is controlled by hollow glass beads 23 of different diameters. Adhesive way of layer thickness; specifically: plane mirror group 4 is made up of plane mirror 24, adhesive post 25, tension screw 26, plane mirror base 27, plane mirror frame 28 and fastening screw 29;

The plane reflector 24 is installed in the plane mirror frame 28 and is a clearance fit; the adhesive column 25 is fixedly connected with the 26 plane mirror base 27 by tension screws; there are at least three adhesive columns 25; the plane reflector 24 is glued to the adhesive column 25 The end face; at least three glued posts 25 are coplanar with the end faces of the plane mirror 24 bonded;

Plane picture frame 28 cooperates with plane mirror holder 27 at the end, and plane picture frame 28 cooperates with folding mirror frame 1 at the end, and fastening screw 28 passes through plane mirror seat 27, plane picture frame 28 and turns mirror frame 1 and is fixedly connected successively.

Hollow glass microspheres 24 are filled in the bonding glue of the plane mirror 24 and the bonding post 25 .

The assembly and adjustment process of the mechanical structure of the refracted light path optical system is:

1. Adhesive plane mirror

As shown in Figures 1 and 3, the plane reflector group 4 is made up of a plane reflector 24, an adhesive column 25, a tension screw 26, a plane mirror base 27, a plane mirror frame 28 and a fastening screw 29; the tension screw 26 wears Through the flat mirror base 27, the adhesive column 25 is fixed on the flat mirror base 27. In order to ensure that the adhesive surfaces are coplanar, the adhesive surface must be manually pushed after the adhesive column 25 is fixed to ensure that the adhesive surfaces are coplanar. surface, requiring its flatness to reach 0.005mm. Afterwards, the plane mirror frame 28 is installed, and the plane mirror 24 gluing program can be entered after completion. The first step is to mix glue. Mix the adhesive glue with the hollow glass microspheres 23 of appropriate diameter in a certain proportion and stir evenly for use, relying on the hollow glass microspheres 23 to accurately control the thickness of the adhesive layer; the second step is dispensing. Make sure the bonding surface is clean before dispensing glue, and dispens glue according to the dispensing amount determined by analysis; the third step is to insert the plane mirror 24 into the frame. Put the plane reflector 24 into the plane mirror frame 28 lightly, and adjust the gap between the plane mirror frame 28 and the plane mirror 24 with a feeler gauge to ensure that the gap is even. The fourth step is to cure the glue spot and detect the surface shape. Stand still, and check the shape of the plane mirror after the glue is cured. There are two design features here. First, hollow glass beads are used to precisely control the thickness of the glue layer. Second, the back-pull structure of the adhesive column ensures that the mirror can be quickly removed after being glued.

2. Centering processing of front and rear cross reticle components

As shown in FIG. 4 , firstly, finish turning is performed on the mating surfaces of the vertical lens barrel 5 and each lens group, including the cylindrical mating surface connecting the lens barrel 16 and the bottom stepped surface. Afterwards, centering processing is carried out on the front cross reticle 31. The processing content includes the outer cylindrical surface and the matching end surface of the front cross reticle 31, and the clearance control between the outer cylindrical surface of the front cross reticle 31 and the lens barrel. At 0.010-0.015; similarly, carry out finishing turning on the matching surfaces of the horizontal lens barrel 6 of the folding mirror frame 1 and each lens group (including the cylindrical matching surface and the bottom step surface), and then center the rear cross reticle Processing, the processing content includes the outer cylindrical surface of the rear cross reticle and the matching end surface, and the matching gap between the outer cylindrical surface of the rear cross reticle and the lens barrel is controlled at 0.010-0.015.

3. Through the heart

As shown in Figure 4, the plane mirror group 4, the front mirror group 2, and the rear mirror group 3 are assembled according to the figure, and pressed with a pressure ring 15; set up an autocollimator or theodolite 32 at a suitable position, and adjust the theodolite 32 Make it self-aligned with the cross reticle of the rear mirror group through the center, ensure the self-alignment of the front mirror group 2 and the theodolite through the trimming of the trimming pad 14, and make the front mirror The cross reticle 31 and the theodolite 32 of the group pass through the center, and this step has ensured that the two lens barrels are still coaxial after being turned by the reflector.

4. Centering processing of front mirror group and rear mirror group

According to the measured diameter of the inner cylindrical surface of the horizontal lens barrel 6 of the folding mirror frame 1, the optical centering process is performed on the rear lens group 3; according to the measured diameter of the vertical lens barrel 5 inner cylindrical surface, the optical centering of the front lens group 2 is performed. Processing: The purpose of optical centering processing is to ensure the coaxiality between the cylindrical mating surface and the optical axis and the perpendicularity between the end surface and the optical axis. The matching gap between the outer cylindrical surface of each frame and the lens barrel is controlled to 0.010-0.015.

5. Interval measurement and hardcover

Measure the optical interval of each lens group, and repair the thickness of the spacer ring according to the measurement results to ensure that the optical interval meets the requirements. Hardcover each lens group to complete the assembly of the entire folding lens.

Claims (3)

1. A mechanical structure of a folded light path optical system, including a folded mirror frame, a front mirror group, a rear mirror group and a plane mirror group; The folding mirror frame is formed by the intersection of the vertical lens barrel arranged vertically and the horizontal lens barrel arranged horizontally, and the plane reflector group is installed at the intersection of the vertical lens barrel and the horizontal lens barrel; the vertical lens barrel and the horizontal lens barrel The central axes of the horizontal lens barrels are coplanar and their intersection points are on the mirror surface of the plane reflector group; The front lens group is installed in the vertical lens barrel; the rear lens group is installed in the horizontal lens barrel; It is characterized by: It also includes connecting screws, trimming pads, pressure rings and connecting lens barrels; the connecting lens barrels include cylinders and flanges arranged at the open ends of the cylinders; internal threads are engraved in the cylinder near the flanges; the The connecting screws pass through the flanging and the trimming pad in order to fix the connecting lens barrel in the vertical lens barrel or the horizontal lens barrel; the outer wall of the pressure ring is engraved with external threads; by connecting the external threads of the pressure ring with the barrel The internal thread of the body is adapted to press the front lens group or the rear lens group; the gap between the cylinder and the vertical lens barrel or between the cylinder and the horizontal lens barrel is all clearance fit; the barrel connecting the lens barrel A top screw hole is provided at the position where the front lens group is installed on the body; a small hole is provided at a position where the vertical lens barrel or the horizontal lens barrel that connects the lens barrel is installed relative to the top screw hole. 2. The mechanical structure of the refracted light path optical system according to claim 1, characterized in that: the plane reflector group consists of plane reflectors, adhesive columns, tension screws, plane mirror bases, plane mirror frames and fastening screws composition; The plane reflector is installed in the plane mirror frame and is a clearance fit; the adhesive column is fixedly connected with the plane mirror base through a tension screw; there are at least three adhesive columns; the plane reflector is glued to the adhesive column End face; at least 3 glued posts are coplanar with the end face of the plane mirror; The flat mirror frame is matched with the flat mirror base, the flat mirror frame is matched with the folded mirror frame, and the fastening screws pass through the plane mirror base, and the plane mirror frame is fixedly connected with the folded mirror frame. 3 . The mechanical structure of the refracting light path optical system according to claim 2 , characterized in that: hollow glass microspheres are filled in the bonding glue of the plane reflector and the bonding post. 4 .