CN203443673U - Light velocity measuring instrument - Google Patents
Light velocity measuring instrument Download PDFInfo
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- CN203443673U CN203443673U CN201320534158.8U CN201320534158U CN203443673U CN 203443673 U CN203443673 U CN 203443673U CN 201320534158 U CN201320534158 U CN 201320534158U CN 203443673 U CN203443673 U CN 203443673U
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- light velocity
- slide rail
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Abstract
The utility model provides a light velocity measuring instrument. The light velocity measuring instrument comprises a frequency meter, an oscilloscope, an electric appliance box, a reflective mirror and a slide rail, wherein the electric appliance box is fixed to the slide rail, the frequency meter and the oscilloscope are in electrical connection with the electric appliance box; the reflective mirror is arranged on the slide rail; the electric appliance box is internally provided with an optical switch and a photoelectric receiving switch; and the optical switch and the photoelectric receiving switch are in electrical connection. The light velocity measuring instrument has the advantages of simple structure, low cost and easy popularization.
Description
Technical field
The utility model relates to a kind of light velocity mesurement device, is specifically related to a kind of light velocity mesurement device based on light-electric feedback oscillation method.
Background technology
Since from the 17th century, Galileo attempts measuring the light velocity for the first time, each period, people adopted state-of-the-art technology to measure the light velocity. now, the distance that light is passed by certain hour has become the unit standard of all linear measure longimetrys, and " length of rice equals the distance that in vacuum, light is propagated in the time interval of 1/299792458 second." light velocity has also been directly used in range observation; on the development of the national economy and Defence business, exhibit one's skill to the full; the speed of light is closely related with uranology again; an important basic constant in the light velocity or physics; many other constants are all relevant to it; the Rydberg constant in spectroscopy for example, relation in electronics between permeability of vacuum and vacuum electric conductance, first radiation constant in Planck black matrix spoke formula, the second spoke constant, the constants such as quality of the elementary particles such as proton, neutron, electronics, μ are all relevant to light velocity C.Just because of this, huge glamour attracts scientific worker, in this problem, to persevere for several decades as if it were one day firmly, takes great pains to immerse oneself in the cause that improves light velocity measurement precision.
Photo-beat method light velocity measurement method has been invented by Nanjing University, and has produced LM2000C type light velocity mesurement device according to the method, this instrument stabilizer, and measuring accuracy is high, but precision parts used is many, and cost is high, is difficult for universal.
Utility model content
The problem that the utility model exists for above-mentioned prior art makes improvements, and the technical problems to be solved in the utility model is to provide a kind of light velocity mesurement device, and this light velocity mesurement device is simple in structure, with low cost, is easy to popularize.
In order to solve the problems of the technologies described above, the utility model provides following technical scheme:
A kind of light velocity mesurement device, comprise frequency meter, oscillograph, electrical appliance kit, reflective mirror, slide rail, described electrical appliance kit is fixed on described slide rail, described frequency meter, oscillograph are electrically connected to described electrical appliance kit, described reflective mirror is located on described slide rail, in described electrical appliance kit, be provided with photoswitch and photoelectricity receiving key, described photoswitch is electrically connected to described photoelectricity receiving key.
As preferred embodiment of the utility model, described slide rail is provided with scale.
As preferred embodiment of the utility model, described reflective mirror is located at described slide rail to be had on a section of scale.Make the required distance of reflective mirror slippage accurately.
The utility model has the advantage of the setting of photoswitch and photoelectricity receiving key, whether photoswitch determines Laser emission, and photoswitch is controlled by photoelectricity receiving key, " anti-phase " relation each other, once be that photoelectricity receiving key is received laser, close immediately photoswitch, stop Laser emission; Through after a while, photoelectricity receiving key can not receive laser, opens again photoswitch, and Emission Lasers, goes round and begins again again, forms " light-electric oscillation ".With a frequency meter, can measure easily the frequency of " light-electric oscillation ".Its frequency is relevant with circuit delay and light path.And on slide rail scale be arranged so that light path is easy to obtain, thereby be easy to record the light velocity.
To sum up, can find out that the utility model geodesic structure is simple, be easy to manufacture, with low cost, can measure accurately the light velocity again, be suitable for widespread use.
Accompanying drawing explanation
Accompanying drawing is used to provide further understanding of the present utility model, and forms a part for instructions, is used from explanation the utility model with embodiment mono-of the present utility model, does not form restriction of the present utility model.In the accompanying drawings:
Fig. 1 is the schematic diagram of a preferred embodiment of the utility model light velocity mesurement device;
Fig. 2 is the working timing figure of Fig. 1.
Embodiment
As shown in Figure 1, 2, the utility model discloses a kind of light velocity mesurement device, comprise frequency meter, oscillograph, electrical appliance kit, reflective mirror, slide rail, electrical appliance kit is fixed on slide rail, frequency meter, oscillograph are electrically connected to electrical appliance kit, reflective mirror is located on slide rail, is provided with photoswitch and photoelectricity receiving key in electrical appliance kit, and photoswitch is electrically connected to photoelectricity receiving key.Slide rail is provided with scale.Reflective mirror is located at slide rail has one section of scale to go up, and makes the required distance of reflective mirror slippage accurately.
As Fig. 1, in the utility model, there are a photoswitch and a photoelectricity receiving key, whether photoswitch determines Laser emission, and photoswitch is controlled by photoelectricity receiving key, " anti-phase " relation each other, once be that photoelectricity receiving key is received laser, close immediately photoswitch, stop Laser emission; Through after a while, photoelectricity receiving key can not receive laser, opens again photoswitch, and Emission Lasers, goes round and begins again again, forms " light-electric oscillation ".
As Fig. 2, at t
0constantly, due to, photoelectricity receiving key no signal, photoswitch is opened, and starts Emission Lasers, t
1light beam is covered L1 light path, t constantly
2the L1+L2 light path of constantly walking to be over, t
3the L1+L2+L3 light path of constantly walking to be over, arrives photoelectricity receiving key, and controls immediately photoswitch, stops Emission Lasers; Note that now in L1+L2+L3 light path still laser beam abrim.At t
4constantly, laser beam is left L1 light path, t
5constantly, light beam leaves L2 light path, t
6constantly, light beam leaves L3 light path, and now, photoelectricity receiving key has not been excited Beam Control, restarts photoswitch, and Emission Lasers, enters next cycle period again.
With a frequency meter, can measure easily the frequency of " light-electric oscillation ".Its frequency is relevant with circuit delay and light path.As can be seen from Figure 2, within an oscillation period, laser beam secondary is through L1, L2, L3.Due to L1=L3, be equivalent to four times through L1 or L3; Secondary is through prism.Light path can directly be read with rule.Circuit time delay cannot directly be measured, but can use D1, and D2 double measurement method is by circuit time delay cancellation.
As Fig. 1, first prism is placed in to D1 position, frequency is now f1; Then prism dolly is moved to D2 place, frequency is now f2.The inverse of frequency is the time, and the ingenious part of this experiment is exactly that frequency quantity by being easy to measure records the very short time interval that is difficult to measure indirectly.The light velocity
To sum up, the utility model geodesic structure is simple, is easy to manufacture, with low cost, can measure accurately the light velocity again, is suitable for widespread use.
The foregoing is only preferred embodiment of the present utility model, be not limited to the utility model, although the utility model is had been described in detail with reference to previous embodiment, for a person skilled in the art, its technical scheme that still can record aforementioned each embodiment is modified, or part technical characterictic is wherein equal to replacement.All within spirit of the present utility model and principle, any modification of doing, be equal to replacement, improvement etc., within all should being included in protection domain of the present utility model.
Claims (3)
1. a light velocity mesurement device, it is characterized in that: comprise frequency meter, oscillograph, electrical appliance kit, reflective mirror, slide rail, described electrical appliance kit is fixed on described slide rail, described frequency meter, oscillograph are electrically connected to described electrical appliance kit, described reflective mirror is located on described slide rail, in described electrical appliance kit, be provided with photoswitch and photoelectricity receiving key, described photoswitch is electrically connected to described photoelectricity receiving key.
2. light velocity mesurement device according to claim 1, is characterized in that: described slide rail is provided with scale.
3. light velocity mesurement device according to claim 1 and 2, is characterized in that: described reflective mirror is located at described slide rail to be had on a section of scale.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201320534158.8U CN203443673U (en) | 2013-08-29 | 2013-08-29 | Light velocity measuring instrument |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201320534158.8U CN203443673U (en) | 2013-08-29 | 2013-08-29 | Light velocity measuring instrument |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN203443673U true CN203443673U (en) | 2014-02-19 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201320534158.8U Expired - Lifetime CN203443673U (en) | 2013-08-29 | 2013-08-29 | Light velocity measuring instrument |
Country Status (1)
| Country | Link |
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| CN (1) | CN203443673U (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106949979A (en) * | 2017-02-09 | 2017-07-14 | 北京建筑大学 | A kind of light velocity measurement method based on LC oscillating circuits |
| CN107845317A (en) * | 2017-09-19 | 2018-03-27 | 鲁东大学 | A kind of experimental method of the single channel photo-beat phase method measurement light velocity |
-
2013
- 2013-08-29 CN CN201320534158.8U patent/CN203443673U/en not_active Expired - Lifetime
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106949979A (en) * | 2017-02-09 | 2017-07-14 | 北京建筑大学 | A kind of light velocity measurement method based on LC oscillating circuits |
| CN107845317A (en) * | 2017-09-19 | 2018-03-27 | 鲁东大学 | A kind of experimental method of the single channel photo-beat phase method measurement light velocity |
| CN107845317B (en) * | 2017-09-19 | 2020-04-10 | 鲁东大学 | Experimental method for measuring light velocity by single-path light beat phase method |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| CX01 | Expiry of patent term |
Granted publication date: 20140219 |
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| CX01 | Expiry of patent term |