CN208847351U - A kind of light velocity analyzer - Google Patents
A kind of light velocity analyzer Download PDFInfo
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- CN208847351U CN208847351U CN201821878397.4U CN201821878397U CN208847351U CN 208847351 U CN208847351 U CN 208847351U CN 201821878397 U CN201821878397 U CN 201821878397U CN 208847351 U CN208847351 U CN 208847351U
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Abstract
The utility model provides a kind of light velocity analyzer, is related to the technical field of light velocity measurement, including the host and oscillograph being connected, host includes: transmitting unit, light path system, opto-electronic receiver unit, the first signal processing unit and second signal processing unit；Transmitting unit, for generating photo-beat signal and the first high-frequency signal；Light path system is connected with transmitting unit, for transmitting photo-beat signal, launches beat frequency light；Opto-electronic receiver unit is connected with light path system, for beat frequency light through photoelectric conversion, to be launched the second high-frequency signal；First signal processing unit is connected with opto-electronic receiver unit, exports for the second high-frequency signal to be mixed with oscillation signals according, after frequency-selecting amplification to the Y input terminal of oscillograph；Second signal processing unit is connected with transmitting unit, exports for the first high-frequency signal to be mixed with the oscillation signals according after two points, after frequency-selecting amplification to the external trigger input terminal of oscillograph.The utility model improves experiment safety.
Description
Technical field
The utility model relates to light velocity determination techniques fields, more particularly, to a kind of light velocity analyzer.
Background technique
The measurement of the light velocity has very special and important meaning in optical development history, in physics theory research
In development course, only particle is said and the arguement of eave theory provides the foundation of judgement for it, and has finally pushed Ai Yinsi
The development of smooth Relativistic Theory.In practical applications, it has broken the unlimited traditional concept of the light velocity, while also having pushed optics real
It tests；Current many universities and colleges have opened up the experiment of light velocity measurement aspect, but the equipment that experiment needs to use is more, Ge Geshe
It needs student oneself to be connected with line between standby, not only connects time-consuming, and be easy to appear safety problem when equipment connection error.
Utility model content
In view of this, being existed in the prior art the purpose of this utility model is to provide a kind of light velocity analyzer with alleviating
Many universities and colleges opened up the experiment of light velocity measurement aspect, but test and need the equipment used more, each equipment room
It needs student oneself to be connected with line, not only connects time-consuming, and be easy to appear safe technical problem when equipment connection error.
In a first aspect, the utility model embodiment provides a kind of light velocity analyzer, wherein include: the host being connected
And oscillograph, the host include: transmitting unit, light path system, opto-electronic receiver unit, the first signal processing unit and the second letter
Number processing unit；
The transmitting unit, for generating photo-beat signal and the first high-frequency signal；
The light path system is connected with the transmitting unit, for transmitting the photo-beat signal, launches beat frequency
Light；
The opto-electronic receiver unit is connected with the light path system, for through photoelectric conversion, launching the beat frequency light
Second high-frequency signal；
First signal processing unit is connected with the opto-electronic receiver unit, for by second high-frequency signal and originally
Machine oscillator signal is mixed, is exported after frequency-selecting amplification to the Y input terminal of the oscillograph；
The second signal processing unit is connected with the transmitting unit, and being used for will be after first high-frequency signal and two point
The oscillation signals according be mixed, frequency-selecting amplification after output to the oscillograph external trigger input terminal.
With reference to first aspect, the utility model embodiment provides the first possible embodiment of first aspect,
In, the transmitting unit includes: acousto-optic frequency shifters and the He-Ne laser being connected with the acousto-optic frequency shifters, high-frequency signal source；
The He-Ne laser emits laser beam to the acousto-optic frequency shifters；
The high-frequency signal source sends sinusoidal signal to the acousto-optic frequency shifters, meanwhile, the processing of Xiang Suoshu second signal is single
Member sends first high-frequency signal；
The acousto-optic frequency shifters generate the photo-beat signal according to the laser beam and the sinusoidal signal.
With reference to first aspect, the utility model embodiment provides second of possible embodiment of first aspect,
In, there is determining difference on the frequency between the laser beam and the sinusoidal signal.
With reference to first aspect, the utility model embodiment provides the third possible embodiment of first aspect,
In, it further include frequency meter.
With reference to first aspect, the utility model embodiment provides the 4th kind of possible embodiment of first aspect,
In, the light path system includes light bar, the first total reflective mirror and the first semi-reflective mirror；
The light bar is set on the light velocity analyzer cabinet between the acousto-optic frequency shifters and first total reflective mirror, and
The acousto-optic frequency shifters, the light bar and first total reflective mirror are in straight line, and the light bar selects in the photo-beat signal
Beat frequency light penetrate；
The beat frequency light is reflected into first semi-reflective mirror through first total reflective mirror transformation predetermined angle；
First semi-reflective mirror is located at the right side of the opto-electronic receiver unit, and the beat frequency light is divided into short range light and long-range
Light；The short range light and the long-range light reach the opto-electronic receiver unit, the short range light pair by different light paths respectively
Dipped beam journey is answered, the long-range light corresponds to distance light journey.
With reference to first aspect, the utility model embodiment provides the 5th kind of possible embodiment of first aspect,
In, the light path system further includes chopper, the second semi-reflective mirror, the second total reflective mirror, third total reflective mirror, the first anti-prism, second
The anti-prism of anti-prism, third and guide rail, the short range light and the long-range light reach the photoelectricity by different light paths respectively
Receiving unit, comprising:
The chopper is for blocking long-range light through short range light or blocking short range light through long-range light；
The chopper, the second semi-reflective mirror, the second total reflective mirror, third total reflective mirror, the first anti-prism and guide rail are all set in
On light velocity analyzer cabinet；The second anti-prism is set on two parallel guide rails with the anti-prism of third, by it is mobile come
Change the distance light journey；
When the chopper blocks long-range light, the short range light is from first semi-reflective mirror through chopper, through the second half
Anti- mirror reaches the opto-electronic receiver unit, the dipped beam journey be first semi-reflective mirror to the distance of second semi-reflective mirror and
Sum of the distance of first total reflective mirror to first semi-reflective mirror；
When the chopper blocks short range light, the long-range light penetrates chopping the light through the second total reflective mirror from first semi-reflective mirror
Device, then successively through the third total reflective mirror, the second anti-prism, the first anti-prism, the anti-prism of the third and described
Second semi-reflective mirror reaches the opto-electronic receiver unit, and the distance light journey is first total reflective mirror to first semi-reflective mirror, institute
The first semi-reflective mirror is stated to arrive to second total reflective mirror, second total reflective mirror to the third total reflective mirror, the third total reflective mirror
The second anti-prism, the second anti-prism to the described first anti-prism, the first anti-prism to the anti-prism of the third,
Sum of the distance of the anti-prism of third to second semi-reflective mirror.
With reference to first aspect, the utility model embodiment provides the 6th kind of possible embodiment of first aspect,
In, first signal processing unit includes: the first frequency mixer and the first frequency-selective amplifier；
First frequency mixer is connected with the opto-electronic receiver box, by second high-frequency signal and local oscillation of input
Signal is transmitted to first frequency-selective amplifier after being mixed；
First frequency-selective amplifier exports after the signal after mixing is amplified processing to the Y input of the oscillograph
End.
With reference to first aspect, the utility model embodiment provides the 7th kind of possible embodiment of first aspect,
In, the second signal processing unit includes: the second frequency mixer and the second frequency-selective amplifier；
Second frequency mixer is connected with the transmitting unit, by the institute after first high-frequency signal of input and two points
It states and is transmitted to second frequency-selective amplifier after oscillation signals according is mixed；
Second frequency-selective amplifier exports after the signal after mixing is amplified processing to the outer touching of the oscillograph
Send out input terminal.
With reference to first aspect, the utility model embodiment provides the 8th kind of possible embodiment of first aspect,
In, further includes: He-Ne laser power supply and positive and negative direct current regulated power supply；
The He-Ne laser power supply is the He-Ne laser power supply in the transmitting unit；
The positive and negative direct current regulated power supply is the chopper in the light path system, the high-frequency signal in the transmitting unit
Source, the opto-electronic receiver unit, first signal processing unit and second signal processing unit power supply.
With reference to first aspect, the utility model embodiment provides the 9th kind of possible embodiment of first aspect,
In, the positive and negative direct current regulated power supply includes: supply voltage indicator light；
The supply voltage indicator light is used to indicate the power supply state of the positive and negative direct current regulated power supply.
The utility model embodiment bring it is following the utility model has the advantages that
The utility model embodiment provides a kind of light velocity analyzer, including the host and oscillograph being connected, host packet
It includes: transmitting unit, light path system, opto-electronic receiver unit, the first signal processing unit and second signal processing unit；Transmitting is single
Member, for generating photo-beat signal and the first high-frequency signal；Light path system is connected with transmitting unit, for passing photo-beat signal
It is defeated, launch beat frequency light；Opto-electronic receiver unit is connected with light path system, for beat frequency light through photoelectric conversion, to be launched second
High-frequency signal；First signal processing unit is connected with opto-electronic receiver unit, is used for the second high-frequency signal and oscillation signals according
It is mixed, exported after frequency-selecting amplification to the Y input terminal of oscillograph；Second signal processing unit is connected with transmitting unit, is used for
First high-frequency signal is mixed with the oscillation signals according after two points, the external trigger of output to oscillograph is defeated after frequency-selecting amplification
Enter end.The utility model embodiment, which passes through, will test transmitting unit used, light path system, opto-electronic receiver unit, the first signal
In light velocity analyzer, student can voluntarily connect experiment dress by probe for processing unit and second signal processing unit combination settings
It sets, and inside modules structure is fixed, avoids security hidden trouble occur because of connection error, improve the safety of experiment.
Other feature and advantage of the utility model will illustrate in the following description, also, partly from specification
In become apparent, or understood and implementing the utility model.The purpose of this utility model and other advantages are illustrating
Specifically noted structure is achieved and obtained in book, claims and attached drawing.
To enable the above objects, features, and advantages of the utility model to be clearer and more comprehensible, preferred embodiment is cited below particularly, and
Cooperate appended attached drawing, is described in detail below.
Detailed description of the invention
It, below will be right in order to illustrate more clearly of specific embodiment of the present invention or technical solution in the prior art
Specific embodiment or attached drawing needed to be used in the description of the prior art are briefly described, it should be apparent that, it is described below
In attached drawing be that some embodiments of the utility model are not paying creativeness for those of ordinary skill in the art
Under the premise of labour, it is also possible to obtain other drawings based on these drawings.
Fig. 1 is a kind of structure chart for light velocity analyzer that the utility model embodiment one provides.
Icon: 01- host；02- oscillograph；10- transmitting unit；11- acousto-optic frequency shifters；12- He-Ne laser；13- high
Frequency source signal；20- light path system；21- light bar；The first total reflective mirror of 221-；The second total reflective mirror of 222-；223- third total reflective mirror；23-
Chopper；The first semi-reflective mirror of 241-；The second semi-reflective mirror of 242-；The anti-prism of 251- first；The anti-prism of 252- second；253- third is anti-
Prism；26- guide rail；30- opto-electronic receiver unit；The first signal processing unit of 40-；The first frequency mixer of 41-；The first frequency-selecting of 42- is put
Big device；50- second signal processing unit；The second frequency mixer of 51-；The second frequency-selective amplifier of 52-；60- frequency meter.
Specific embodiment
To keep the objectives, technical solutions, and advantages of the embodiments of the present invention clearer, below in conjunction with attached drawing to this
The technical solution of utility model is clearly and completely described, it is clear that described embodiment is that the utility model a part is real
Example is applied, instead of all the embodiments.Based on the embodiments of the present invention, those of ordinary skill in the art are not making
Every other embodiment obtained, fall within the protection scope of the utility model under the premise of creative work.
Current many universities and colleges have opened up the experiment of light velocity measurement aspect, but the equipment that experiment needs to use is more,
Each equipment room needs student oneself to be connected with line, not only connect it is time-consuming, and be easy to appear when equipment connection error safety ask
Topic., be based on this, a kind of light velocity analyzer provided by the embodiment of the utility model, can by transmitting unit used in test,
Light path system, opto-electronic receiver unit, the first signal processing unit and second signal processing unit combination settings are in light velocity analyzer
Interior, student can voluntarily connect experimental provision by probe, and inside modules structure is fixed, and avoid safety occur because of connection error
Potential problem improves the safety of experiment.
To be surveyed to a kind of light velocity disclosed in the utility model embodiment first convenient for understanding the present embodiment
Determine instrument to describe in detail.
Embodiment one:
Fig. 1 is a kind of structure chart for light velocity analyzer that the utility model embodiment one provides.
As shown in Figure 1, light velocity analyzer includes: the host 01 and oscillograph 02 being connected, host 01 includes: transmitting unit
10, light path system 20, opto-electronic receiver unit 30, the first signal processing unit 40 and second signal processing unit 50；
Transmitting unit 10, for generating photo-beat signal and the first high-frequency signal；
Light path system 20 is connected with transmitting unit 10, for transmitting photo-beat signal, launches beat frequency light；
Opto-electronic receiver unit 30 is connected with light path system 20, for beat frequency light through photoelectric conversion, to be launched the second high frequency
Signal；
First signal processing unit 40 is connected with opto-electronic receiver unit 30, for believing the second high-frequency signal and local oscillation
Number be mixed, after frequency-selecting amplification output to oscillograph 02 Y input terminal；
Second signal processing unit 50 is connected with transmitting unit 10, for the machine after the first high-frequency signal and two points to be shaken
Signal is swung to be mixed, exported after frequency-selecting amplification to the external trigger input terminal of oscillograph 02.
In the utility model embodiment, the working principle of opto-electronic receiver unit 30 can refer to beat frequency light through opto-electronic receiver list
It is irradiated on photodiode after optical mirror slip reflection and focusing in member 30, is converted to the second high-frequency signal.It is normal to measure the light velocity
Formula are as follows:
In formula, C is the light velocity；F is beat frequency；Δ L is optical path difference；ΔΦ is phase difference.
The frequency of oscillation F for the high-frequency signal source 13 that beat frequency f is twice, wherein the frequency of oscillation F of high-frequency signal source 13 is by frequency
Rate meter 60 measures；If phase difference ΔΦ is 2 π, optical path difference Δ L is equal to photo-beat wavelength.So light velocity analyzer can by
When the photo-beat waveform that oscillograph 02 is shown is overlapped, the light path system 20 on host 01 is adjusted to change long-range light, determines optical path difference
Δ L, and then determine light velocity C.
Further, as shown in Figure 1, transmitting unit 10 includes: acousto-optic frequency shifters 11 and is connected with acousto-optic frequency shifters 11
He-Ne laser 12, high-frequency signal source 13；
He-Ne laser 12 emits laser beam to acousto-optic frequency shifters 11；
High-frequency signal source 13 sends sinusoidal signal to acousto-optic frequency shifters 11, meanwhile, it is sent to second signal processing unit 50
First high-frequency signal；
Acousto-optic frequency shifters 11 generate photo-beat signal according to laser beam and sinusoidal signal.
In the utility model embodiment, it is 632nm for wavelength that He-Ne laser 12, which is launched, and output frequency is more than
The laser beam of 1MW, the without hindrance light hole center by acousto-optic frequency shifters 11 of laser beam, meanwhile, high-frequency signal source 13 is to sound
The transmission frequency of optical frequency shifter 11 is about 50MHz, power probably in the sinusoidal signal of 1W or so, passes through and adjusts 11 bottom of acousto-optic frequency shifters
Six screws on seat make laser beam and sinusoidal signal be added in acousto-optic frequency shifters 11 effect that is overlapped mutually, and then make acousto-optic frequency translation
The photo-beat signal of the generation high frequency power of device 11.
Further, there is determining difference on the frequency between laser beam and sinusoidal signal.
Specifically, in order to generate photo-beat signal, it is desirable that superimposed laser beam and sinusoidal signal has certain difference on the frequency,
It can be realized by the interaction of laser beam and sinusoidal signal.
Further, light velocity analyzer further includes frequency meter 60.
Specifically, Q9 high frequency cables can be used, the input that the output of high-frequency signal source 13 is connected to frequency meter 60 is inserted
Mouthful, the frequency of oscillation of high-frequency signal source 13 is read from frequency meter 60.
Further, as shown in Figure 1, light path system 20 include light bar 21, the first total reflective mirror 221, the second total reflective mirror 222,
Third total reflective mirror 223, chopper 23, the first semi-reflective mirror 241, the second semi-reflective mirror 242, the first anti-prism 251, the second anti-prism
252, the anti-prism 253 of third and guide rail 26.
Light bar 21 is set on the light velocity analyzer cabinet between acousto-optic frequency shifters 11 and the first total reflective mirror 221, and acousto-optic
Frequency shifter 11, light bar 21 and the first total reflective mirror 221 are in straight line, and light bar 21 selects the beat frequency light in photo-beat signal to penetrate；
Beat frequency light is reflected into the first semi-reflective mirror 241 through the first total reflective mirror 221 transformation predetermined angle；
First semi-reflective mirror 241 is located at the right side of opto-electronic receiver unit, and beat frequency light is divided into short range light and long-range light；Short range light
Reach opto-electronic receiver unit by different light paths respectively with long-range light, short range light corresponds to dipped beam journey, and long-range light corresponds to distance light journey.
Chopper 23 is for blocking long-range light through short range light or blocking short range light through long-range light；
It chopper 23, the second semi-reflective mirror 242, the second total reflective mirror 222, third total reflective mirror 223, the first anti-prism 251 and leads
Rail 26 is all set on light velocity analyzer cabinet；Second anti-prism 252 is set to two parallel guide rails with the anti-prism 253 of third
On 26, distance light journey can be changed by mobile；
When chopper 23 blocks long-range light, short range light is from the first semi-reflective mirror 241 through chopper 23, through the second semi-reflective mirror
242 reach opto-electronic receiver unit, and dipped beam journey is the distance and the first total reflective mirror of first the 241 to the second semi-reflective mirror of semi-reflective mirror 242
The sum of the distance of 221 to the first semi-reflective mirror 241；
When chopper 23 blocks short range light, long-range light penetrates chopper through the second total reflective mirror 222 from the first semi-reflective mirror 241
23, then it is successively anti-through third total reflective mirror 223, the second anti-prism 252, the first anti-prism 251, the anti-prism 253 of third and the second half
Mirror 242 reaches opto-electronic receiver unit, and distance light journey is first total reflective mirror the 221 to the first semi-reflective mirror 241, the first semi-reflective mirror 241 to the
Two total reflective mirrors 222, the second total reflective mirror 222 to third total reflective mirror 223, the anti-prism 252, second of third total reflective mirror 223 to the second are anti-
The anti-prism 251 of prism 252 to the first, the first anti-prism 251 arrive the anti-prism 253 of third, anti-the 253 to the second semi-reflective mirror of prism of third
242 sum of the distance.
In the embodiments of the present invention, because photo-beat signal, which is beaten on 21 position of light bar, light bar 21, to be seen
To the diffraction light spot of a row of horizontal, 21 centre bore height of light bar and 221 center of the first total reflective mirror are contour, make beat frequency light without blocking
Pass through light bar 21, when adjusting, should close the switch of positive and negative direct current regulated power supply.
After connecting the switch of positive and negative direct current regulated power supply, long-range light and short range light are successively cut off with chopper 23 respectively, then
Show the photo-beat waveform of short range light and long-range light simultaneously on the fluorescent screen of oscillograph 02.Specifically there are following two steps:
Step 1: blocking long-range light with chopper 23, adjusts the first total reflective mirror 221, the first semi-reflective mirror 241 passes through short range light
On the photosurface for the photodiode that second semi-reflective mirror 242 is incident on opto-electronic receiver unit 30, push aside on opto-electronic receiver unit 30
Window observable short range light whether be accurately incident on the center of photosurface, at this point, can be seen on the fluorescent screen of oscillograph 02
To the photo-beat waveform of short range light.
Step 2: short range light is blocked with chopper, adjusts the first semi-reflective mirror 241, the second total reflective mirror 222, third total reflective mirror
223, the first anti-prism 251, the second anti-prism 252 and the anti-prism 253 of third, enter long-range light finally through the second semi-reflective mirror 242
It is mapped on the photosurface central point of photosensitive tube, at this point, can see the photo-beat waveform of long-range light on the fluorescent screen of oscillograph 02.
Because chopper 23, the first semi-reflective mirror 241 and the second semi-reflective mirror 242 are all fixed on light velocity analyzer cabinet, so
The dipped beam journey of short range light immobilizes, and can be used as the reference quantity of distance light journey, movement of the second anti-prism 252 on guide rail 26
Can change the anti-prism 252 of third total reflective mirror 223 to the second distance and the second anti-prism 251 of anti-prism 252 to the first away from
From, movement of the anti-prism 253 of third on guide rail 26 can change the first anti-prism 251 to the distance of the anti-prism 253 of third and
The distance of anti-the 253 to the second semi-reflective mirror of prism 242 of third, the shifting of the second anti-prism 252 and the anti-prism 253 of third on guide rail 26
The dynamic distance for changing long-range light, and then change the optical path difference between distance light journey and dipped beam journey.
Two above step is adjusted repeatedly, until the short range light being shown on the fluorescent screen of oscillograph 02 and two kinds of long-range light
The photo-beat waveform and phase coincidence of light wave, to achieve the purpose that measure light wave spread speed in air.
The orientation of the photosurface of the photodiode of opto-electronic receiver unit 30 can pass through 30 peripheral hardware of opto-electronic receiver unit
Adjusting knob is adjusted, and the purpose for adjusting the orientation of the photosurface of photodiode is the waveform for guaranteeing to be shown on oscillograph 02
Amplitude is maximum.
Further, the first signal processing unit 40 includes: the first frequency mixer 41 and the first frequency-selective amplifier 42；
First frequency mixer 41 is connected with opto-electronic receiver box, and the second high-frequency signal and the oscillation signals according of input are mixed
The first frequency-selective amplifier 42 is transmitted to after frequency；
First frequency-selective amplifier 42 exports after the signal after mixing is amplified processing to the Y input terminal of oscillograph 02.
In the utility model embodiment, the second high-frequency signal is mixed with oscillation signals according, is put through the first frequency-selecting
Big device 42 is exported after amplifying to the Y input terminal of oscillograph 02.
Further, second signal processing unit 50 includes: the second frequency mixer 51 and the second frequency-selective amplifier 52；
Second frequency mixer 51 is connected with transmitting unit 10, and the local oscillation after the first high-frequency signal of input and two points is believed
The second frequency-selective amplifier 52 is transmitted to after number being mixed；
Second frequency-selective amplifier 52 by the signal after mixing amplify processing after output to oscillograph 02 external trigger it is defeated
Enter end.
In the utility model embodiment, the first high-frequency signal and two that high-frequency signal source 13 is sent to the second frequency mixer 51
Oscillation signals according after point is exported after 52 enhanced processing of the second frequency-selective amplifier after being mixed to the outer touching of oscillograph 02
Send out input terminal.Oscillograph 02 avoids using internal trigger in order to correctly show the phase difference of two-way light wave, should be arranged to outer work of setting out
Make state, otherwise cannot accurately compare the phase difference of two kinds of light waves.The Y output end of oscillograph 02 and the external trigger of oscillograph 02 are defeated
Outlet can be used Q9 high frequency cables with the external trigger input terminal of the Y input terminal of oscillograph 02 and oscillograph 02 and be connected.
Further, light velocity analyzer, further includes: He-Ne laser power supply and positive and negative direct current regulated power supply；
He-Ne laser power supply is that the He-Ne laser 12 in transmitting unit 10 is powered；
Positive and negative direct current regulated power supply is opto-electronic receiver unit 30, in chopper 23 and transmitting unit 10 in light path system 20
High-frequency signal source 13 power.
Positive and negative direct current regulated power supply be light path system 20 in chopper 23, the high-frequency signal source 13 in transmitting unit 10,
Opto-electronic receiver unit 30, the first signal processing unit 40 and second signal processing unit 50 are powered.
Further, positive and negative direct current regulated power supply includes: supply voltage indicator light；
Supply voltage indicator light is used to indicate the power supply state of positive and negative direct current regulated power supply.
In the utility model embodiment, He-Ne laser power supply uses voltage doubling rectifing circuit, and operating voltage part uses
Big electrolysis has certain electric current output.
Positive and negative direct current regulated power supply is using the fixed integrated voltage-stabilizing device in three ends, and positive and negative direct current regulated power supply is ± 15V, respectively
For high-frequency signal source 13, opto-electronic receiver unit 30, the first signal processing unit 40 and the second signal processing in transmitting unit 10
Unit 50 is powered, and -15V is the motor power supply of the chopper 23 in light path system 20 after reduction regulation is handled.
The input voltage of light velocity analyzer can be set to AC220 ± 10%V, frequency 50Hz, and consumption power is 30W,
And outer dimension can be set to 1000 × 280 × 200mm, net weight 24KG, sustainable work 5 hours, light velocity analyzer is suitable for
The environment temperature of work should be in a horizontal state between 10 DEG C~35 DEG C, and before work and be placed on firm, smooth laboratory table
On, interior should not become clear.
The utility model embodiment provides a kind of light velocity analyzer, including the host and oscillograph being connected, host packet
It includes: transmitting unit, light path system, opto-electronic receiver unit, the first signal processing unit and second signal processing unit；Transmitting is single
Member, for generating photo-beat signal and the first high-frequency signal；Light path system is connected with transmitting unit, for passing photo-beat signal
It is defeated, launch beat frequency light；Opto-electronic receiver unit is connected with light path system, for beat frequency light through photoelectric conversion, to be launched second
High-frequency signal；First signal processing unit is connected with opto-electronic receiver unit, is used for the second high-frequency signal and oscillation signals according
It is mixed, exported after frequency-selecting amplification to the Y input terminal of oscillograph；Second signal processing unit is connected with transmitting unit, is used for
First high-frequency signal is mixed with the oscillation signals according after two points, the external trigger of output to oscillograph is defeated after frequency-selecting amplification
Enter end.The utility model embodiment, which passes through, will test transmitting unit used, light path system, opto-electronic receiver unit, the first signal
In light velocity analyzer, student can voluntarily connect experiment dress by probe for processing unit and second signal processing unit combination settings
It sets, and inside modules structure is fixed, avoids security hidden trouble occur because of connection error, improve the safety of experiment.
It is apparent to those skilled in the art that for convenience and simplicity of description, the system of foregoing description
It with the specific work process of device, can refer to corresponding processes in the foregoing method embodiment, details are not described herein.
In addition, in the description of the utility model embodiment unless specifically defined or limited otherwise, term " installation ",
" connected ", " connection " shall be understood in a broad sense, for example, it may be being fixedly connected, may be a detachable connection, or integrally connect
It connects；It can be mechanical connection, be also possible to be electrically connected；It can be directly connected, can also indirectly connected through an intermediary, it can
To be the connection inside two elements.For the ordinary skill in the art, above-mentioned term can be understood with concrete condition
Concrete meaning in the present invention.
It, can be with if the function is realized in the form of SFU software functional unit and when sold or used as an independent product
It is stored in a computer readable storage medium.Based on this understanding, the technical solution of the utility model substantially or
Person says that the part of the part that contributes to existing technology or the technical solution can be embodied in the form of software products,
The computer software product is stored in a storage medium, including some instructions are used so that computer equipment (can be with
Personal computer, server or the network equipment etc.) execute each embodiment the method for the utility model whole or portion
Step by step.And storage medium above-mentioned include: USB flash disk, mobile hard disk, read-only memory (ROM, Read-Only Memory), with
Machine accesses various Jie that can store program code such as memory (RAM, Random Access Memory), magnetic or disk
Matter.
It is in the description of the present invention, it should be noted that term " center ", "upper", "lower", "left", "right", " perpendicular
Directly ", the orientation or positional relationship of the instructions such as "horizontal", "inner", "outside" is to be based on the orientation or positional relationship shown in the drawings, and is only
For ease of description the utility model and simplify description, rather than the device or element of indication or suggestion meaning must have it is specific
Orientation, be constructed and operated in a specific orientation, therefore should not be understood as limiting the present invention.In addition, term " the
One ", " second ", " third " are used for descriptive purposes only and cannot be understood as indicating or suggesting relative importance.
Finally, it should be noted that embodiment described above, only specific embodiment of the present utility model, to illustrate this
The technical solution of utility model, rather than its limitations, the protection scope of the utility model is not limited thereto, although referring to aforementioned
The utility model is described in detail in embodiment, those skilled in the art should understand that: it is any to be familiar with this skill
The technical staff in art field within the technical scope disclosed by the utility model, still can be to skill documented by previous embodiment
Art scheme modify or can readily occur in variation or equivalent replacement of some of the technical features；And these modifications,
Variation or replacement, the spirit and model of the utility model embodiment technical solution that it does not separate the essence of the corresponding technical solution
It encloses, should be covered within the scope of the utility model.Therefore, the protection scope of the utility model is answered described is wanted with right
Subject to the protection scope asked.
Claims (10)
1. a kind of light velocity analyzer characterized by comprising the host and oscillograph being connected, the host include: that transmitting is single
Member, light path system, opto-electronic receiver unit, the first signal processing unit and second signal processing unit；
The transmitting unit, for generating photo-beat signal and the first high-frequency signal；
The light path system is connected with the transmitting unit, for transmitting the photo-beat signal, launches beat frequency light；
The opto-electronic receiver unit is connected with the light path system, for the beat frequency light through photoelectric conversion, to be launched second
High-frequency signal；
First signal processing unit is connected with the opto-electronic receiver unit, for second high-frequency signal and the machine to shake
Signal is swung to be mixed, exported after frequency-selecting amplification to the Y input terminal of the oscillograph；
The second signal processing unit is connected with the transmitting unit, for by the institute after first high-frequency signal and two points
Oscillation signals according is stated to be mixed, exported after frequency-selecting amplification to the external trigger input terminal of the oscillograph.
2. light velocity analyzer according to claim 1, which is characterized in that the transmitting unit include: acousto-optic frequency shifters and
He-Ne laser, the high-frequency signal source being connected with the acousto-optic frequency shifters；
The He-Ne laser emits laser beam to the acousto-optic frequency shifters；
The high-frequency signal source sends sinusoidal signal to the acousto-optic frequency shifters, meanwhile, Xiang Suoshu second signal processing unit hair
Send first high-frequency signal；
The acousto-optic frequency shifters generate the photo-beat signal according to the laser beam and the sinusoidal signal.
3. light velocity analyzer according to claim 2, which is characterized in that have between the laser beam and the sinusoidal signal
There is determining difference on the frequency.
4. light velocity analyzer according to claim 2, which is characterized in that further include frequency meter.
5. light velocity analyzer according to claim 2, which is characterized in that the light path system includes light bar, first is all-trans
Mirror and the first semi-reflective mirror；
The light bar is set on the light velocity analyzer cabinet between the acousto-optic frequency shifters and first total reflective mirror, and described
Acousto-optic frequency shifters, the light bar and first total reflective mirror are in straight line, and the light bar selects the bat in the photo-beat signal
Frequency light penetrates；
The beat frequency light is reflected into first semi-reflective mirror through first total reflective mirror transformation predetermined angle；
First semi-reflective mirror is located at the right side of the opto-electronic receiver unit, and the beat frequency light is divided into short range light and long-range light；
The short range light and the long-range light reach the opto-electronic receiver unit by different light paths respectively, and the short range light is corresponding close
Light path, the long-range light correspond to distance light journey.
6. light velocity analyzer according to claim 5, which is characterized in that the light path system further includes chopper, second
Semi-reflective mirror, the second total reflective mirror, third total reflective mirror, the first anti-prism, the second anti-prism, the anti-prism of third and guide rail, the short range
Light and the long-range light reach the opto-electronic receiver unit by different light paths respectively, comprising:
The chopper is for blocking long-range light through short range light or blocking short range light through long-range light；
The chopper, the second semi-reflective mirror, the second total reflective mirror, third total reflective mirror, the first anti-prism and guide rail are all set in the light velocity
On analyzer cabinet；The second anti-prism is set on two parallel guide rails with the anti-prism of third, is changed by mobile
The distance light journey；
When the chopper blocks long-range light, the short range light is from first semi-reflective mirror through chopper, through the second semi-reflective mirror
Reach the opto-electronic receiver unit, the dipped beam journey is first semi-reflective mirror to the distance of second semi-reflective mirror and described
Sum of the distance of first total reflective mirror to first semi-reflective mirror；
When the chopper blocks short range light, the long-range light penetrates chopper through the second total reflective mirror from first semi-reflective mirror,
Again successively through the third total reflective mirror, the second anti-prism, the first anti-prism, the anti-prism of the third and described second
Semi-reflective mirror reaches the opto-electronic receiver unit, and the distance light journey is first total reflective mirror to first semi-reflective mirror, described the
One semi-reflective mirror is to second total reflective mirror, second total reflective mirror to the third total reflective mirror, the third total reflective mirror described in
It is second anti-prism, the second anti-prism to the described first anti-prism, the first anti-prism to the anti-prism of the third, described
Sum of the distance of the anti-prism of third to second semi-reflective mirror.
7. light velocity analyzer according to claim 1, which is characterized in that first signal processing unit includes: first
Frequency mixer and the first frequency-selective amplifier；
First frequency mixer is connected with the opto-electronic receiver box, by second high-frequency signal and oscillation signals according of input
First frequency-selective amplifier is transmitted to after being mixed；
First frequency-selective amplifier exports after the signal after mixing is amplified processing to the Y input terminal of the oscillograph.
8. light velocity analyzer according to claim 1, which is characterized in that the second signal processing unit includes: second
Frequency mixer and the second frequency-selective amplifier；
Second frequency mixer is connected with the transmitting unit, by described after first high-frequency signal of input and two points
Machine oscillator signal is transmitted to second frequency-selective amplifier after being mixed；
Second frequency-selective amplifier by the signal after mixing amplify processing after output to the oscillograph external trigger it is defeated
Enter end.
9. light velocity analyzer according to claim 1, which is characterized in that further include: He-Ne laser power supply and positive and negative straight
Flow regulated power supply；
The He-Ne laser power supply is the He-Ne laser power supply in the transmitting unit；
The positive and negative direct current regulated power supply be the light path system in chopper, the high-frequency signal source in the transmitting unit,
The opto-electronic receiver unit, first signal processing unit and second signal processing unit power supply.
10. light velocity analyzer according to claim 9, which is characterized in that the positive and negative direct current regulated power supply includes: power supply
Voltage indicator lamp；
The supply voltage indicator light is used to indicate the power supply state of the positive and negative direct current regulated power supply.
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|---|---|---|---|
| CN201821878397.4U CN208847351U (en) | 2018-11-14 | 2018-11-14 | A kind of light velocity analyzer |
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| CN201821878397.4U CN208847351U (en) | 2018-11-14 | 2018-11-14 | A kind of light velocity analyzer |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110531103A (en) * | 2019-09-30 | 2019-12-03 | 浙江海洋大学 | A kind of light velocity measurement method and apparatus based on Lissajou's figure |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
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| CN110531103A (en) * | 2019-09-30 | 2019-12-03 | 浙江海洋大学 | A kind of light velocity measurement method and apparatus based on Lissajou's figure |
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