CN104932099B - Window follow-up mechanism of scanning imaging camera - Google Patents

Abstract

The invention discloses a window follow-up mechanism of a scanning imaging camera, which comprises a swing mirror seat, a gear 1, a window plate, a guide rail, a bearing joint and a rolling bearing. The two ends are fixedly connected with the gear one; the window plate is provided with a through hole, and the lower surface of the window plate is provided with a gear two capable of meshing with the gear one, and the gear one meshes with the gear two to form a gear pair; The guide rails are arranged on the lower surfaces of opposite ends of the window plate; the rolling bearings are located below the window plate and are limited on the guide rail; the guide rail and the swing mirror seat are respectively fixed on the workbench; the bearing joint is fixedly connected with the window plate, It is arranged under the window plate, and one end of the bearing joint is connected with the rolling bearing. When the pendulum mirror rotates, the gear pair drives the window plate to move linearly along the guide rail. The invention has the advantages of simple structure, good working stability, high reliability, simple structure of parts and easy processing and assembly.

Description

A scanning imaging camera window following mechanism

technical field

The invention relates to the field of scanning imaging camera window mechanisms, in particular to vehicle-mounted and airborne scanning imaging cameras with high requirements for stray light.

Background technique

When a general scanning imaging camera is working, targets with different field of view angles enter the optical system through the rotation of the oscillating mirror to complete the scanning and imaging function. Rotation, so the camera window must meet the requirements of the swing mirror at different rotation angles to receive the light at the corresponding angle, so it is necessary to design a camera window that meets the requirements. It can be seen from Figure 1 that the window size of the camera is related to the working size of the oscillating mirror and the angle α between the mirror surface and the main optical axis. When the camera is scanning and imaging, α changes within a certain angle range. In order to ensure the imaging quality of the optical system, It is necessary to ensure that the ideal window position and size will change with the change of α.

In the prior art, the general scanning imaging camera window only determines a relatively large camera window according to the two limit values of the α angle, and its structural form is shown in Figure 2. Its structural form is simple, that is, the window is designed to The light can be received within the range of the rotation angle of the mirror, but the window does not move correspondingly with the rotation of the swing mirror, so when the swing mirror is at different angles, a large amount of stray light will enter the optical system, which will cause the image quality to decline or even fail. Serious consequences such as normal imaging.

Contents of the invention

Aiming at many problems caused by the excessively large window size of ordinary scanning imaging cameras in the prior art, and taking into account the complex working conditions and high imaging requirements when it works on vehicle-mounted and airborne platforms, the present invention provides a scanning imaging camera Camera window follower.

In order to solve the above technical problems, the present invention provides the following technical solutions:

A scanning imaging camera window following mechanism, which is special in that:

Including swing mirror base, gear 1, window plate, guide rail, bearing joint and rolling bearing,

The swing mirror seat includes a plate for fixedly connecting the swing mirror, and the opposite ends of the plate are fixedly connected with the gear one;

The window plate is provided with a through hole, and the lower surface of the window plate is provided with a gear 2 capable of meshing with the gear 1, and the gear 1 and the gear 2 mesh to form a gear pair; the guide rail is arranged on the opposite side of the window plate. The lower surfaces of both ends of the window; the rolling bearing is located under the window plate and is limited on the guide rail;

The guide rail and the swing mirror seat are respectively fixed on the workbench;

The bearing joint is fixedly connected with the window plate, and is arranged under the window plate, and one end of the bearing joint is connected with the rolling bearing,

When the pendulum mirror rotates, the gear pair drives the window panel to move linearly along the guide rail.

The bearing joint connected with the rolling bearing is provided with a pin shaft one, the rolling bearing is provided with a hole, and the pin shaft one is connected in the hole.

The outer end of the bearing pin one is equipped with a bearing pressure ring, and the bearing pressure ring is threadedly connected with the bearing pin.

The above-mentioned through hole is oval.

The projection of the working surface of the swing mirror fixedly connected to the swing mirror seat on the window plate is consistent with the shape and size of the through hole.

The threaded connection between the bearing joint and the window plate.

The plate connecting the swing mirror is a swing mirror plate, and the swing mirror seat also includes plate one and plate two, and plate one and plate two are arranged at opposite ends of the swing mirror plate respectively, and pins are arranged on plate one and plate two respectively. The shaft two and the pin shaft two are all fixedly connected with the gear one.

The gear one and the pin shaft two are fixedly connected by a flat key.

The present invention has the following technical effects:

Compared with the prior art, the window plate of the present invention can continuously adjust the position of the window according to the requirements of the swing mirror at different angles, so as to ensure the imaging quality of the optical system, improve the suppression of stray light, the mechanism configuration is simple, and the work Good stability, high reliability, simple parts structure, easy processing and assembly.

Description of drawings

Figure 1 is a schematic diagram of the optical path of a scanning imaging camera;

Fig. 2 is the structural form diagram of existing scanning imaging camera window;

Fig. 3 is a structural representation of the present invention;

Fig. 4 is a structural sectional view of the present invention;

Fig. 5 is a schematic diagram of the assembly structure of the window panel and the guide rail;

Fig. 6 is a sectional view of the assembly structure of the window panel and the guide rail;

Fig. 7 is a schematic diagram of the structure of the mirror holder;

Fig. 8 is a schematic diagram of the gear structure;

Fig. 9 is a structural schematic diagram of a window panel;

Figure 10 is a schematic diagram of the guide rail structure;

Figure 11 is a schematic diagram of the structure of the bearing joint.

The marks in the figure are: 1. Swing mirror seat, 2. Flat key, 3. Gear, 4. Window plate, 5. Guide rail, 6. Bearing joint, 7. Rolling bearing, 8. Bearing pressure ring, 9. Plate One, 10, board two.

detailed description

The present invention provides a scanning imaging camera window follow-up mechanism. The present invention will be further described in detail below in conjunction with the accompanying drawings, as shown in Figures 1 to 11, including a swing mirror seat 1, a gear 3, a window plate 4, and a guide rail 5 , the bearing joint 6 and the rolling bearing 7, the swing mirror seat includes a plate for fixedly connecting the swing mirror, and the opposite ends of the plate are fixedly connected with a gear one; the window plate is provided with a through hole, and the lower surface of the window plate is provided with Gear 2 that can mesh with gear 1, gear 1 meshes with gear 2 to form a gear pair, when gear 1 rotates, the circular motion of gear 1 is converted into the linear motion of window plate 4, so as to achieve the purpose of window translation; the guide rail is set on The lower surfaces of the two opposite ends of the window plate; the rolling bearings are located under the window plate and are limited on the guide rail; the guide rail and the swing mirror seat are respectively fixed on the workbench; the workbench can be a camera box.

The bearing joint is fixedly connected with the window plate, which can be connected by thread. The bearing joint is arranged under the window plate, and one end of the bearing joint is connected with the rolling bearing. The bearing joint and the corresponding rolling bearing can be arranged at the four corners below the window plate. When rotating, the gear pair drives the window plate to move linearly along the guide rail, and when the window plate moves linearly along the guide rail, the rolling bearing rolls on the guide rail.

The length of the guide rail 5 can meet the limit position of the movement of the window panel, the guide rail can provide support for the window panel 4, and the guide rail can specifically adopt a U-shaped structure.

The number of teeth and tooth shape parameters of gear 1 can be designed according to the motion range and precision of different window plate parts 4 .

The bearing joint connected with the rolling bearing is provided with a pin shaft one, the rolling bearing is provided with a hole, and the pin shaft one is connected in the hole.

The outer end of bearing pin one is equipped with bearing pressure ring 8, and bearing pressure ring is threadedly connected with bearing pin.

The through hole is elliptical, and the size of the through hole is determined according to the projection of the working surface of the pendulum mirror.

The projection of the working surface of the swing mirror fixedly connected to the swing mirror seat on the window plate is consistent with the shape and size of the through hole.

The threaded connection between the bearing joint and the window plate.

The plate connecting the swing mirror is a swing mirror plate, and the swing mirror seat can be a U-shaped structure. The two ends, plate one and plate two are respectively provided with pin shaft two, and the pin shaft two is fixedly connected with said gear one. Pin shaft 2 is connected with the camera as a whole through rolling bearings to form a revolving pair. When the camera is working, the swing mirror is fixed on the swing mirror seat 1, so that the swing mirror seat 1 rotates on the camera as a whole to drive the swing mirror to rotate, thereby achieving the purpose of scanning and imaging.

The gear one and the pin shaft two are fixedly connected by a flat key.

During work, the swing mirror, swing mirror base 1, and gear 3 are fixedly connected, and the gear pair formed between the gear 3 and the window plate 4, the window plate 4 can pass through the bearing joint 6, the rolling bearing 7, and the bearing pressure ring 8 Linear movement is carried out in the guide rail 5. When the pendulum mirror rotates, the rotation of the pendulum mirror is converted into the linear motion of the window through the gear pair. When the racetrack-shaped through hole on the window plate moves linearly to different positions in the direction limited by the guide rail, the size of the window will change. Corresponding changes can prevent stray light from entering the optical system and improve imaging quality.

Claims (8)

1. A scanning imaging camera window follow-up mechanism, characterized in that: Including swing mirror base, gear 1, window plate, guide rail, bearing joint and rolling bearing, The swing mirror seat includes a plate for fixedly connecting the swing mirror, and the opposite ends of the plate are fixedly connected with the gear one; The window plate is provided with a through hole, and the lower surface of the window plate is provided with a gear 2 capable of meshing with the gear 1, and the gear 1 and the gear 2 mesh to form a gear pair; the guide rail is arranged on the opposite side of the window plate. The lower surfaces of both ends of the window; the rolling bearing is located under the window plate and is limited on the guide rail; The guide rail and the swing mirror seat are respectively fixed on the workbench; The bearing joint is fixedly connected with the window plate, and is arranged under the window plate, and one end of the bearing joint is connected with the rolling bearing, When the pendulum mirror rotates, the gear pair drives the window panel to move linearly along the guide rail. 2. The scanning imaging camera window follow-up mechanism according to claim 1, characterized in that: The bearing joint connected with the rolling bearing is provided with a pin shaft one, the rolling bearing is provided with a hole, and the pin shaft one is connected in the hole. 3. The scanning imaging camera window follow-up mechanism according to claim 2, characterized in that: the outer end of the pin shaft 1 is provided with a bearing pressure ring, and the bearing pressure ring is threadedly connected with the pin shaft 1. 4. The scanning imaging camera window following mechanism according to claim 3, characterized in that: the through hole is elliptical. 5. The scanning imaging camera window follow-up mechanism according to claim 3, characterized in that: the projection of the working surface of the swing mirror fixedly connected to the swing mirror seat on the window plate and the shape and size of the through hole unanimous. 6. The scanning imaging camera window follow-up mechanism according to claim 4 or 5, characterized in that: the bearing joint and the window plate are screwed together. 7. The scanning imaging camera window follow-up mechanism according to claim 6, characterized in that: the plate fixedly connected to the swing mirror is a swing mirror plate, and the swing mirror seat also includes plate one and plate two, plate one and plate two They are respectively arranged at opposite ends of the pendulum mirror plate, and the pin shafts 2 are respectively arranged on the plate 1 and the plate 2, and the gear 1 is fixedly connected to the pin shaft 2. 8. The scanning imaging camera window follower mechanism according to claim 7, characterized in that: the first gear and the second pin are fixedly connected by a flat key.