阅读说明：本技术 基于双步进电机的快速机械光开关 (Quick mechanical optical switch based on double-step motor ) 是由 欧阳鑫川 成华东 徐斌 叶美凤 万金银 肖玲 刘亮 于 2020-06-08 设计创作，主要内容包括：一种基于双步进电机的快速响应机械光开关,包括底座及固定在底座上的两个光开关,每个光开关由步进电机、叶片和步进电机支架构成,所述的步进电机安装在步进电机支架上,且该步进电机的转轴与所述的叶片相连,在所述的步进电机支架上设有通光孔,所述的叶片宽度大于该通光孔的直径,所述的步进电机带动叶片转动,使叶片周期性的遮挡与露出通光孔,所述的两个光开关的通光孔同轴。本发明与现有的机械开关相比,具有体积小,震动小,响应速度快,可自动复位,寿命长,可精确调整光脉冲时间等优点。(A quick response mechanical optical switch based on a double-step motor comprises a base and two optical switches fixed on the base, wherein each optical switch is composed of a step motor, a blade and a step motor support, the step motor is installed on the step motor support, a rotating shaft of the step motor is connected with the blade, a light through hole is formed in the step motor support, the width of the blade is larger than the diameter of the light through hole, the step motor drives the blade to rotate, the blade is periodically shielded and exposed out of the light through hole, and the light through holes of the two optical switches are coaxial. Compared with the existing mechanical switch, the invention has the advantages of small volume, small vibration, high response speed, automatic reset, long service life, accurate adjustment of light pulse time and the like.)

1. A quick response mechanical optical switch based on a double-stepping motor is characterized by comprising a base and two optical switches fixed on the base, wherein each optical switch is composed of a stepping motor, a blade and a stepping motor support, the stepping motor is installed on the stepping motor support, a rotating shaft of the stepping motor is connected with the blade, a light through hole is formed in the stepping motor support, the width of the blade is larger than the diameter of the light through hole, the stepping motor drives the blade to rotate, the blade is enabled to periodically shield and expose the light through hole, and the light through holes of the two optical switches are coaxial.

2. The dual stepper motor based fast response mechanical-optical switch of claim 1, wherein: the stepping motor support is arranged on the base through the flexible cushion.

3. The dual stepper motor based fast response mechanical-optical switch of claim 1, wherein: the stepping motor is controlled to be opened and closed through external drive, when the two blades are just powered on, the initial position of one of the two blades is locked at the light blocking position, the other blade is locked at the light passing position, and when the stepping motor works, the external drive controls the two stepping motors to rotate back and forth between the light passing position and the light blocking position.

Technical Field

The invention relates to the field of optical devices, in particular to a quick mechanical optical switch based on a double-step motor.

Background

Optical switches are generally classified into two types, mechanical switches and non-mechanical switches, and the mechanical optical switches are generally classified into electromagnetic drive types and motor drive types. In laser physical experiments, an acousto-optic modulator is often used as an optical switch, but the acousto-optic modulator is not suitable for an integrated optical system because it has a certain requirement on the length of an optical path and is not high enough in isolation. The time of the optical pulse is required to be accurately regulated and controlled by physical experiments, and the vibration of the optical switch is required to be small enough to reduce the influence on the optical path, so that the electromagnetic driving type mechanical optical switch is not suitable.

Chinese patent application No. CN201720039772.5 discloses a mechanical optical switch based on a relay, which drives an optical path device on an extension arm to move up and down by controlling power-on and power-off of the relay, thereby controlling on/off of an optical path. However, the method has large vibration, the response speed is limited by a relay, and the light pulse time cannot be accurately regulated, so that the method is not suitable for occasions with high requirements on the optical switch, such as laser physical experiments.

Disclosure of Invention

In order to solve the problems, the invention provides a quick mechanical optical switch based on a double-step motor, which reduces the vibration of the optical switch during opening and closing and realizes quick response and accurate regulation and control of optical pulses.

The technical solution of the invention is as follows:

a quick response mechanical optical switch based on a double-stepping motor is characterized by comprising a base and two optical switches fixed on the base, wherein each optical switch is composed of a stepping motor, a blade and a stepping motor support, the stepping motor is installed on the stepping motor support, a rotating shaft of the stepping motor is connected with the blade, a light through hole is formed in the stepping motor support, the width of the blade is larger than the diameter of the light through hole, the stepping motor drives the blade to rotate, the blade is enabled to periodically shield and expose the light through hole, and the light through holes of the two optical switches are coaxial.

The stepping motor support is arranged on the base through the flexible cushion.

The stepping motor is controlled to be opened and closed through external drive, when the two blades are just powered on, the initial position of one of the two blades is locked at the light blocking position, the other blade is locked at the light passing position, and when the stepping motor works, the external drive controls the two stepping motors to rotate back and forth between the light passing position and the light blocking position.

The radius of the light beam is smaller than that of the light through hole.

The width of the blade is larger than the diameter of the light through hole.

The invention has the technical effects that:

the two stepping motors are controlled by external driving to rotate back and forth at the light-passing and light-blocking positions, so that the independent control of the on and off of the light pulse is realized, and the response time of the stepping motors is not limited, thereby achieving the effect of quick response. And because the on and off are independently controlled, the time of the light pulse can be accurately regulated and controlled.

The stepping motor support is fixed on the bottom plate through the flexible cushion, so that the vibration of the optical switch during opening and closing can be effectively reduced, and the stability of a light path is further improved.

The light through hole on the support of the stepping motor is larger than the radius of the light beam, so that the mechanical switch has no loss on the power of the light.

Drawings

FIG. 1 is a schematic structural diagram of a fast mechanical optical switch based on a dual stepping motor;

FIG. 2 is a schematic view of the manner in which the stepper motor, blades, and stepper motor mounting bracket are secured

Detailed Description

The present invention will be further described with reference to the accompanying drawings and the detailed description, but the scope of the invention should not be limited thereby.

Fig. 1 shows a fast mechanical optical switch based on a dual stepper motor, which comprises stepper motors 1, 2, blades 3, 4, stepper motor mounting brackets 5, 6, flexible pads 7, 8 and a base 9. As shown in figure 2, the fixing mode of the stepping motor, the blades and the mounting brackets of the stepping motor is that the two mounting brackets are fixed on the base through the flexible cushion, so that the influence of vibration on a light path is reduced, the light through holes in the brackets are coaxial, and the radius of the light through holes is larger than that of a light beam. The initial locking position of one blade is a light-blocking position, and the initial locking position of the other blade is a light-transmitting position.

When the motor mounting bracket is used, under the condition that the radius of a light beam is large, the radius of the light beam can be adjusted by the lens group to be smaller than the radius of the light through hole, then the two blades are adjusted to be in the light through position, the mounting base is adjusted again, the light beam enters the light through hole in the motor mounting bracket through two steps, and finally the initial position of the blades is recovered. The stepping motor drive can receive two paths of control signals (high and low levels) to respectively control the two stepping motors to rotate back and forth at the light passing position and the light blocking position, and the specific control process comprises the steps of firstly giving one path of control signal high level to enable one blade 3 to rotate to the light passing position, then giving the other path of control signal low level to enable the other blade 4 to rotate to the light blocking position, and then giving the two paths of control signals driven by the stepping motors in turn to enable the mechanical optical switch to be independently controlled to be opened and closed. Therefore, the response time of the invention is not limited by the response time of the stepping motor, the invention can quickly respond, and the time of the light pulse can be accurately regulated and controlled by controlling the time difference of high and low levels of the two motors.

Finally, it should be noted that: the above examples are only intended to illustrate the technical solution of the present invention, but not to limit it; although the present invention has been described in detail with reference to the foregoing embodiments, it will be understood by those of ordinary skill in the art that: the technical solutions described in the foregoing embodiments may still be modified, or some technical features may be equivalently replaced; and such modifications or substitutions do not depart from the spirit and scope of the corresponding technical solutions of the embodiments of the present invention.