阅读说明：本技术 一种用于迈克尔逊干涉仪的条纹自动计数装置 (Automatic fringe counting device for Michelson interferometer ) 是由 谌业清 李昊冉 吴曦冉 程琳 于 2021-08-06 设计创作，主要内容包括：本发明公开了一种用于迈克尔逊干涉仪的条纹自动计数装置,包括机体,所述机体的右侧表面内设有光阑,所述光阑能够安装在迈克尔逊干涉仪的观察屏上,所述光阑的左壁内贯穿有透光孔,所述透光孔的内部设置有用于检测所述观察屏上的条纹亮暗变化的光敏三极管,所述光敏三极管连接有用于进行信号处理的STM32单片机,所述STM32单片机上设有用于显示电平变化次数的LCD显示屏,能够很好的解决迈克尔逊仪的不便计数的问题,进而使得实验结果更加的准确,同时也能缓解长时间观察条纹而导致的眼部疲劳,也很好的避免了由于观察记录失误而导致的实验失败的问题。(The invention discloses an automatic fringe counting device for a Michelson interferometer, which comprises a machine body, wherein a diaphragm is arranged in the right side surface of the machine body, the diaphragm can be installed on an observation screen of the Michelson interferometer, a light hole penetrates through the left wall of the diaphragm, a phototriode for detecting the brightness change of fringes on the observation screen is arranged inside the light hole, the phototriode is connected with an STM32 single chip microcomputer for signal processing, an LCD (liquid crystal display) screen for displaying the level change times is arranged on the STM32 single chip microcomputer, the problem that the Michelson interferometer is inconvenient to count can be well solved, the experimental result is more accurate, eye fatigue caused by long-time observation of fringes can be relieved, and the problem that experiment fails caused by observation and recording errors is well solved.)

1. The utility model provides a fringe automatic counting assembly for michelson interferometer which characterized in that: including organism (4), be equipped with diaphragm (1) in the right flank surface of organism (4), diaphragm (1) can be installed on michelson interferometer's observation screen (6), it has light trap (2) to run through in the left wall of diaphragm (1), the inside of light trap (2) is provided with and is used for detecting phototriode (3) of the bright dark change of stripe on observation screen (6), phototriode (3) are connected with STM32 singlechip (7) that are used for carrying out signal processing, be equipped with LCD display screen (5) that are used for showing the level change number of times on STM32 singlechip (7).

2. The automatic fringe counting apparatus according to claim 1, wherein: and the phototriode (3) is connected with a pin of the STM32 singlechip.

3. The automatic fringe counting apparatus according to claim 1, wherein: the phototriode (3) is arranged at the left end of the light hole (2).

4. The automatic fringe counting apparatus according to claim 1, wherein: the phototriode (3) is used for converting the detected changed optical signal into a correspondingly changed electric signal and then transmitting the signal to the STM32 singlechip (7) through the change of the pin level.

5. The automatic fringe counting apparatus according to claim 1, wherein: be provided with the STM32 chip in STM32 singlechip (7), the STM32 chip can receive connect on the STM32 singlechip (7) the change of phototriode (3) department I/O mouth level carries out data analysis and data processing to data are integrated.

Technical Field

The invention relates to the field of physical experiment instruments, in particular to an automatic fringe counting device for a Michelson interferometer.

Technical Field

The michelson interferometer is an amplitude-splitting double-beam interferometer, is a precision interferometer designed and manufactured by american scientists michelson in 1881, can be used for measuring wavelength, refractive index, thickness and small length change of light waves and the like, and has precision comparable to the wavelength of light.

The Michelson interferometer has the advantages of simple structure, intuitive optical path and high precision, and has typicality in adjustment and use, and a precision interferometer developed according to the basic principle of the Michelson interferometer is widely applied to the fields of production and scientific research, so that the basic structure of the Michelson interferometer is necessary to know the using method of the Michelson interferometer, and the Michelson interferometer experiment is also a key point in the teaching of college physical experiments.

In the experimental process, a micro-motion hand wheel needs to be rotated to observe the phenomena of 'overflow' and 'swallow' of the interference rings, a clear area of the interference rings is selected, then the zero point of an instrument is adjusted in the center of an observation screen, the micro-motion hand wheel is slightly rotated, 50 interference rings are recorded when the interference rings are 'overflow' or 'swallow', the position of a primary reflector (the sum of readings of a scale, a reading window and the micro-motion hand wheel) is up to the 450 th, and then the data is processed by a beat-to-beat method, and the wavelength lambda and the relative error delta are obtained.

However, in the experimental process, the interference fringes can not be correctly recorded due to various reasons, for example, the number of turns is forgotten due to careless distraction when the number of turns is counted, so that the experimental work is abandoned, or in the experimental process, due to slight vibration of a table caused by environmental factors, concentric circular fringes with alternating light and dark fringes can be violently vibrated, so that the reading is inaccurate, and eye fatigue is caused by studying that the display screen is stared at for a long time, so that the automatic interference fringe change recording device can accurately record the interference fringe change in the experimental process by using the change of the light and dark fringes aiming at the problems existing in the observation of the interference fringes.

Disclosure of Invention

In order to overcome the defects in the prior art, the invention provides an automatic fringe counting device for a Michelson interferometer.

Technical scheme

The utility model provides a fringe automatic counting assembly for michelson interferometer, includes the organism, be equipped with the diaphragm in the right flank of organism, the diaphragm can be installed on the observation screen of michelson interferometer, it has the light trap to run through in the left wall of diaphragm, the inside of light trap is provided with and is used for detecting the phototriode of the bright and dark change of fringe on the observation screen, the phototriode is connected with the STM32 singlechip that is used for carrying out signal processing, be equipped with the LCD display screen that is used for showing the level change number of times on the STM32 singlechip.

Further, the phototriode is connected with a pin of the STM32 singlechip.

Further, the phototriode is arranged at the left end of the light hole.

Further, the phototriode is used for converting the detected changed optical signal into a correspondingly changed electric signal, and then the signal is transmitted to the STM32 singlechip through the change of the pin level.

Further, be provided with the STM32 chip in the STM32 singlechip, the STM32 chip can receive connect on the STM32 singlechip the change of phototriode department I/O mouth level carries out data analysis and data processing to data are integrated.

Advantageous effects

Compared with the prior art, the invention has the following beneficial effects: come to show the change of connecting phototriode department IO mouth level on the STM32 singlechip through STM32 single chip microcomputer control LCD display screen 5, and then can very audio-visually see out the change of the bright dark stripe of michelson appearance when doing the experiment again, and can trigger outside interruption when the level jumps, and every time get into the interruption and will count once, thereby realize the automatic counting effect to the bright dark stripe change of michelson appearance, fine solution the inconvenient problem of counting of michelson appearance, and phototriode sets up the left end at the light trap, thereby can avoid other bright stripes to influence the detection to the bright dark change of center department, and then make the more accuracy of experimental result, also can alleviate the eye fatigue that long-time observation stripe and lead to simultaneously, also fine avoided because observe the problem of the experiment failure that the record error leads to.

Drawings

Fig. 1 is a schematic structural diagram of an automatic fringe counting device for a michelson interferometer according to the present invention.

FIG. 2 is a schematic of the three-dimensional structure of the present invention;

FIG. 3 is a schematic view of another angle three-dimensional structure of the present invention;

FIG. 4 is a real object diagram of the STM32 single chip microcomputer and an LCD display screen;

FIG. 5 is a schematic diagram of a Michelson interferometer;

fig. 6 is a top view of fig. 5.

Reference numerals: diaphragm 1, light trap 2, phototriode 3, organism 4, LCD display screen 5, observation screen 6, STM32 singlechip 7.

Detailed Description

For a better illustration of the invention, reference is made to the following description, taken in conjunction with the accompanying drawings and examples:

as shown in fig. 1-6, the present invention discloses a fringe automatic counting device for michelson interferometer,

including organism 4, be equipped with diaphragm 1 in the right flank surface of organism 4, diaphragm 1 can be installed on michelson interferometer's observation screen 6, it has light trap 2 to run through in the left wall of diaphragm 1, the inside of light trap 2 is provided with and is used for detecting the phototriode 3 of the bright dark change of stripe on the observation screen 6, phototriode 3 is connected with the STM32 singlechip 7 that is used for carrying out signal processing, be equipped with the LCD display screen 5 that is used for showing the level change number of times on the STM32 singlechip 7.

Further, the phototriode 3 is connected with a pin of the STM32 singlechip.

Further, in order to prevent other bright stripes from affecting the detection of the bright and dark changes at the center, the phototriode 3 is arranged at the left end of the light hole 2.

Further, the phototriode 3 can convert the detected changed optical signal into a correspondingly changed electrical signal, and then transmit the signal to the STM32 singlechip 7 through the change of the pin level.

Further, be provided with the STM32 chip in the STM32 singlechip 7, the STM32 chip can receive connect on the STM32 singlechip 7 the change of phototriode 3 department I/O mouth level to carry out data analysis and data processing, integrate data.

Specifically, after the preparation work is finished, a switch of the STM32 single chip microcomputer 7 is turned on, and an external interrupt system of the STM32 single chip microcomputer starts to work;

then the phototriode 3 detects the dark and bright change of the central point of the observation screen 6, thereby causing the level to change;

because the phototriode 3 is connected with the STM32 singlechip through an external interrupt pin, external interrupt is triggered when level jump occurs, and the count is carried out once each interrupt is entered;

then the LCD display screen 5 is controlled by the STM32 single chip microcomputer to display the number of times of level change, namely the number of times of dark and bright stripe change, so that the change condition of the dark and bright stripes can be displayed in real time during experiments.

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 technical solutions of the present invention have been described in detail with reference to the foregoing embodiments, it should be understood by those skilled in the art that the technical solutions described in the foregoing embodiments can be modified or some technical features can be replaced equally; and the modifications or the substitutions do not make the essence of the corresponding technical solutions depart from the spirit and scope of the technical solutions of the embodiments of the present invention.