CN205430730U - Low -power consumption light source - Google Patents
Low -power consumption light source Download PDFInfo
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- CN205430730U CN205430730U CN201620069383.2U CN201620069383U CN205430730U CN 205430730 U CN205430730 U CN 205430730U CN 201620069383 U CN201620069383 U CN 201620069383U CN 205430730 U CN205430730 U CN 205430730U
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Abstract
The utility model relates to a low -power consumption light source, it is regional including constant temperature, the flat -temperature zone intra -area is provided with modified high -frequency oscillating circuits, modified high -frequency oscillating circuits has exciting coil through circuit connection, the exciting coil groove is provided with the spectrum bulb, spectrum bulb right side is provided with neutral color filter, the neutral color filter right side is provided with lens, the lens right side is chamber bubble system, the utility model discloses an in the biasing of original rubidium spectroscopic lamp vibratory stimulation circuit to ally oneself with a positive temperature coefficient PTC resistance rp, when the spectroscopic lamp was started working, resistance rp resistance was lower, was convenient for make the rapid build -up of luminance of rubidium spectroscopic lamp, and behind the constant temperature point of 120 degrees left and right sides of spectroscopic lamp entering, its resistance value will rise to tens kilohms rapidly, through setting up neutral color filter, the optical attenuation that makes the rubidium spectroscopic lamp send arrives the light intensity that we need, and through setting up lens, the light that makes the rubidium spectroscopic lamp send becomes parallel light, effective utilization ratio that improves light.
Description
Technical field
This utility model relates to spectral lamp light source field, particularly relates to a kind of low-power consumption light source.
Background technology
Ball-type glass envelope commonly used by spectral lamp bulb, diameter about 10-15.Bulb is also filled with in addition to being filled with metal rubidium excitation potential is low, chemical property inactive build-up of luminance gas.Conventional Kr or Ar, air pressure 1-2Torr, bulb is placed in the oscillator coil of a high frequency generator, and frequency of oscillation is about about 100MHz, power 1-5W.The highest required exciting power of frequency of oscillation is the least, and the lowest required exciting power of frequency of oscillation is the biggest.Easily putting when exciting power is big and light a lamp, but exciting power is the biggest, the life-span of lamp is the shortest.It addition, exciting power is too big, producing heat too many, lamp house is then difficult to temperature control.Exciting power is also big to the High-frequency Interference of All other routes in frequency marking greatly, is difficult to eliminate.So, typically under conditions of ensureing lamp steady operation, by the least exciting power.
The luminous principle of spectral lamp electrodless discharge approximately as: a small amount of ion existed original in build-up of luminance gas and electronics are accelerated by high-frequency electric field, its kinetic energy is made to increase, thus with build-up of luminance gas molecule collision, producing more ion and electronics, ion or electronics that kinetic energy is higher just can be energized into excited state up build-up of luminance gas molecule with build-up of luminance gas molecule collision.When it returns to ground state it can be seen that build-up of luminance gas molecule is luminous.But if this build-up of luminance gas molecule being in excited state just can be transferred to rubidium atom excited energy with rubidium atomic and molecular collision, what oneself was radiationless returns to ground state, and going in rubidium atomic excitation to excited state.When rubidium atom returns to ground state from excited state it can be seen that rubidium atom is luminous.Extremely low at bulb temperature, in the case of rubidium atomic density is relatively low, often only see build-up of luminance gas molecule luminous.Higher at bulb temperature, in the case of rubidium atomic density is higher, rubidium atom luminescence just has comparative advantage, and the most often only sees the luminescence of rubidium atom and can't see the luminescence of build-up of luminance gas molecule.In the case of two kinds of luminescence process transition, often see that two kinds of luminescence process alternately occur: be mainly build-up of luminance gas molecule luminous a little while, become the most again mainly rubidium atom luminous.This phenomenon is referred to as relaxation oscillations, and frequency of oscillation is likely to several kilo hertzs from several hertz of zero point.In order to obtain stable pumping light, whole lamp house include bulb and pierce circuit all should constant temperature, temperature is controlled in the temperature of rubidium atom stabilized illumination.
Based on above reason, a kind of low-power consumption light source is needed to be devised, by in the biasing of original rubidium spectral lamp vibratory stimulation circuit, a positive temperature coefficient PTC resistor Rp in parallel, and Rp is placed on spectral lamp constant temperature sleeve, when spectral lamp is started working, resistance Rp resistance is relatively low, thus produces bigger exciting power, it is simple to make the rapid build-up of luminance of rubidium spectral lamp, after spectral lamp enters the constant temperature point of about 120 degree, its resistance value will be rapidly increased to tens kilohms.This allows for spectral lamp in build-up of luminance stage and normal work stage, it is thus achieved that more satisfactory corresponding exciting power；By arranging neutral colour filter, the light decay making rubidium spectral lamp send reduces to the light intensity that we need, and by arranging lens, the light making rubidium spectral lamp send becomes directional light, is effectively improved the utilization rate of light, i.e. a kind of low-power consumption light source.
Utility model content
The purpose of this utility model is to overcome the deficiencies in the prior art, it is provided that a kind of low-power consumption light source.
This utility model is to be achieved through the following technical solutions:
A kind of low-power consumption light source, including constant temperature zone, the high-frequency oscillating circuits of improvement it is provided with in described constant temperature zone, the high-frequency oscillating circuits of described improvement is connected by circuit excitation coil, described excitation coil groove is provided with spectrum bulb, it is provided with neutral colour filter on the right side of described spectrum bulb, on the right side of described neutral colour filter, is provided with lens, be cavity bubble system on the right side of described lens；The light that described spectral lamp steep raising goes out is through being directional light by lens post polymerization after neutral colour filter.
Existing rubidium light modulation exciting circuit starts initial time at bulb, and the high frequency electric field E that inductance L1 produces makes noble gas Ar ionization luminescence in spectrum bulb.Under the effect of high frequency magnetic field, ion makees high-speed screw motion in bubble.Meanwhile, the temperature in bubble district rises on the constant temperature point of about 120 degree under the effect of lamp constant-temperature circuit and plasma heating effect.Now, the metal rubidium in bubble forms simple substance rubidium atom saturated vapor, and the inert gas ion of high-speed motion and the rubidium atom of vaporous collide, and makes rubidium atom obtain energy and enters high level, then transits to low-lying level from high level, discharge photon.The inventive method proposes a kind of method utilizing ptc material to make temperature and resistance value addition high frequency oscillation circuit, and by neutral colour filter and the light path of battery of lens synthesis spectral lamp after spectral lamp luminescence, under the spectral profile premise not changing lamp, obtain 1 light intensity frequency displacement point, improve the frequency stability of atomic clock.In bubble, noble gas is from normality to state of ionization, it is desirable to provide bigger exciting power.After once starting, this excessive power just seems unnecessary.These unnecessary power, will bring bigger negative effect to the steady operation of atomic frequency standard.First, owing to exciting power is big, the power that correspondingly exciter tube T consumes also will be relatively big, easily cause pipe overheated, thus reduce the stability of whole atomic frequency standard.Second, owing to quite a few dump power discharges with going into operation of radiation, it will result in the interference to system, causes electromagnetic compatibility problem.3rd, spaceborne atomic frequency standard working environment is in outer space, and satellite energy seems precious especially.
The high-frequency oscillating circuits of described improvement is compared with existing oscillating circuit, by in the biasing of original rubidium spectral lamp vibratory stimulation circuit, a positive temperature coefficient PTC resistor Rp in parallel, Rp is placed on spectral lamp constant temperature sleeve, Rp had both been used as temperature sensor, is used as again electric current and controls performer.The resistance value of Rp is about 20 ohms at normal temperatures, and after spectral lamp enters the constant temperature point of about 120 degree, its resistance value will be rapidly increased to tens kilohms.This allows for spectral lamp in build-up of luminance stage and normal work stage, it is thus achieved that more satisfactory corresponding exciting power.Spectral lamp is in room temperature state, and Rp is the least, and vibratory stimulation pipe T base current is very big, and therefore pipe T exciting current Ic is very big, and spectral lamp can obtain the highest exciting power, thus quickly starts spectral lamp work.With the continuous rising of real spectral lamp flat-temperature zone temperature, Rp rises, and exciter tube T base current reduces rapidly, so that exciting current Ic reduces the most rapidly, until the constant temperature point of about 120 degree.
For improving the signal to noise ratio of whole inactive type rubidium atom frequency scale, we have employed the method for optical pumping, but pumping light will cause the movement of 87Rb atomic transition frequency, and it is substantially the average effect of the AC Stark effect that alternation optical frequency electric field produces.The energy shift of 87Rb atomic ground state is by pumping light:
(3)
(4)
Wherein, P is electric dipole moment operator, the complex amplitude of optical electric field during E,It isThe life-span of excited state,WithIt is respectively excited state and the energy of ground state level.
Due to the simply b line of pumping 87Rb atom, it is typically only capable to cause the energy shift of F=1, mF=0.Optical frequency shift and energy shift have a following relation:
(5)
Understood optical frequency shift by above-mentioned formula to be directly proportional to light intensity, relevant with spectral profile.If it addition, pumping light is monochromatic light, and just, the most do not cause optical frequency shift；If, then negative frequency shift is caused；If, then positive frequency displacement is caused；IfFall far short, then the absolute value of the frequency shift amount caused withInversely.
In actual Rb atom frequency marking, pumping light is not monochromatic light, but has the superposition of a plurality of spectral line of certain live width and linear function.In the range of pumping light optical lineshape function, some frequency component produces positive optical frequency shift, and another part frequency component produces negative optical frequency shift.The frequency displacement of the 0-0 transition that this nonmonochromatic light causes is the superposition (integration) of many frequency displacements that monochromatic light causes.Therefore, from the point of view of Rb atom frequency marking, the spectrum line style of holding pumping light is constant is critically important on reducing optical frequency shift on the impact of frequency marking aging drift；Together with the selection of light intensity is generally hooked by we with the selection of spectral lamp temperature, this is because, changing the temperature of spectral lamp, whole spectral profile will be made to change, under different spectral profile, light intensity change is different to the contribution of system.Therefore, before selecting suitable light strong further, it should select a suitable spectral lamp lamp temperature.In actual applications, by changing spectral lamp lamp temperature, measure the rate-adaptive pacemaker of system, find the lamp temperature flex point to frequency, Fig. 3 is the curve of the optical frequency shift-lamp temperature of actual measurement；From the figure 3, it may be seen that along with the change of spectral lamp temperature, the frequency of system output can change in 1 × 10 12/0C and 4 × 10 11/0C.It is to be noted, in spectral lamp temperature control link, the change of actual measurement lamp temperature is the least, its reduction factor is about 100, therefore, when doing " lamp temperature frequency " experiment, first in the extensive search lamp temperature flex point to frequency, such as lamp temperature change step is 1 DEG C, then, searches again for a flex point in this little scope of lamp warm spot.
The stability that spectrum light is strong has the biggest impact to the stability indicator of frequency marking, and Fig. 4 is the optical frequency shift-light intensity test curve of actual measurement；Under normal circumstances, light intensity is 1 × 10 12/1% on the impact of frequency, i.e. light intensity change 1%, then cause frequency is changed to 1 × 10 12.Certainly for different rubidium clock systems, light intensity is different to the influence degree of frequency, would also vary from for being operated in the same system of different conditions.Be operated in the frequency marking of 1 light intensity frequency displacement point, light intensity I on the impact of f with regard to fairly small (ideally the change of light intensity I will not cause the change of f).Therefore, we optimize one side systematic parameter to be passed through, and reduce the light intensity change impact on frequency displacement, on the other hand to take measures, be controlled light by force, make the stabilized intensity sexual satisfaction of lamp realize the requirement needed for system index.In the selection of light intensity, its main purpose is to find " 1 light intensity frequency displacement point ".In order to select a suitable light intensity, can be by changing the exciting power of spectral lamp, lamp temperature etc..After new spectral lamp is made, corresponding lamp exciting power circuit is supporting with it, generally should not at will change lamp exciting power.It is known that, the temperature of spectral lamp is generally divided into three parts: relaxation oscillations district, flat region, self-reversal district.Owing to generally interval, flat region is bigger, spectral lamp lamp temperature selects interval at this, and the change of light intensity lamp temperature is more much smaller than other interval, therefore generally we select spectral lamp lamp temperature on this interval.But it should be noted that problem, exactly because spectral lamp lamp temperature being selected in flat region, light intensity can knots modification be very limited amount of, and this is not easy to us and changes light intensity on a large scale and meet the demand in actual application.Moreover, we change the temperature of spectral lamp, have changed the spectral profile of lamp.And the release of neutral colour filter, above-mentioned difficulties will be solved, it is a kind of effective way that experiment is also proved it.Its specific practice is to place neutral colour filter between rubidium spectral lamp bubble and integrated filtering resonance bubble, and the light decay making rubidium spectral lamp send reduces to the light intensity that we need.One fairly simple way is to use transparent plastic, because it compares book, it is possible to easily in imbedding system, and owing to monolithic transparent plastics are smaller to the attenuation rate of light, therefore light can compare fine regulation.
Further, the frequency of oscillation that the high-frequency oscillating circuits of described improvement uses when working is 110MHz.
Further, described lens are convex mirror, have spotlight effect.
Further, described neutral colour filter uses monolithic transparent plastic material to make, and monolithic transparent plastic material compares book, it is possible to easily in imbedding system, owing to monolithic transparent plastics are smaller to the attenuation rate of light, therefore light can compare fine regulation.
Compared with prior art, the beneficial effects of the utility model are: this utility model simple in construction, reasonable in design, by in the biasing of original rubidium spectral lamp vibratory stimulation circuit, a positive temperature coefficient PTC resistor Rp in parallel, and Rp is placed on spectral lamp constant temperature sleeve, when spectral lamp is started working, resistance Rp resistance is relatively low, thus produce bigger exciting power, it is easy to make the rapid build-up of luminance of rubidium spectral lamp, after spectral lamp enters the constant temperature point of about 120 degree, its resistance value will be rapidly increased to tens kilohms.This allows for spectral lamp in build-up of luminance stage and normal work stage, it is thus achieved that more satisfactory corresponding exciting power；By arranging neutral colour filter, the light decay making rubidium spectral lamp send reduces to the light intensity that we need, and by arranging lens, the light making rubidium spectral lamp send becomes directional light, is effectively improved the utilization rate of light.
Accompanying drawing explanation
Fig. 1 is structural representation of the present utility model；
Fig. 2 is existing rubidium spectral lamp exciting circuit block diagram；
Fig. 3 is the high-frequency oscillating circuits block diagram improved in this utility model；
Fig. 4 is optical frequency shift-lamp temperature test curve figure；
Fig. 5 is optical frequency shift-light intensity test curve.
In figure: 1, constant temperature zone, 2, the high-frequency oscillating circuits improved, 3, excitation coil, 4, spectrum bulb, 5, neutral colour filter, 6, lens, 7, cavity bubble system, 8, directional light.
Detailed description of the invention
In order to make the purpose of this utility model, technical scheme and advantage clearer, below in conjunction with drawings and Examples, this utility model is further elaborated.Should be appreciated that specific embodiment described herein, only in order to explain this utility model, is not used to limit this utility model.
Refer to Fig. 1-5, Fig. 1 is structural representation of the present utility model, Fig. 1 is structural representation of the present utility model, Fig. 2 is existing rubidium spectral lamp exciting circuit block diagram, Fig. 3 is the high-frequency oscillating circuits block diagram improved in this utility model, Fig. 4 is optical frequency shift-lamp temperature test curve figure, and Fig. 5 is optical frequency shift-light intensity test curve.
A kind of low-power consumption light source, including constant temperature zone 1, the high-frequency oscillating circuits 2 of improvement it is provided with in described constant temperature zone 1, the high-frequency oscillating circuits 2 of described improvement is connected by circuit excitation coil 3, described excitation coil 3 groove is provided with spectrum bulb 4, it is provided with neutral colour filter 5 on the right side of described spectrum bulb 4, on the right side of described neutral colour filter 5, is provided with lens 6, be cavity bubble system 7 on the right side of described lens 6；The light that described spectrum bulb 4 sends is through being directional light 8 by lens 6 post polymerization after neutral colour filter 5；The frequency of oscillation used when the high-frequency oscillating circuits 2 of described improvement works is 110MHz；Described lens 6 are convex mirror, have spotlight effect；Described neutral colour filter 5 uses monolithic transparent plastic material to make, and monolithic transparent plastic material compares book, it is possible to easily in imbedding system, owing to monolithic transparent plastics are smaller to the attenuation rate of light, therefore light can compare fine regulation.
As one preferred embodiment of this utility model, this utility model is by the biasing of original rubidium spectral lamp vibratory stimulation circuit, a positive temperature coefficient PTC resistor Rp in parallel, and Rp is placed on spectral lamp constant temperature sleeve, when spectral lamp is started working, resistance Rp resistance is relatively low, thus produce bigger exciting power, being easy to make the rapid build-up of luminance of rubidium spectral lamp, after spectral lamp enters the constant temperature point of about 120 degree, its resistance value will be rapidly increased to tens kilohms.This allows for spectral lamp in build-up of luminance stage and normal work stage, it is thus achieved that more satisfactory corresponding exciting power；By arranging neutral colour filter, the light decay making rubidium spectral lamp send reduces to the light intensity that we need, and by arranging lens, the light making rubidium spectral lamp send becomes directional light, is effectively improved the utilization rate of light.
The foregoing is only preferred embodiment of the present utility model, not in order to limit this utility model, all any amendment, equivalent and improvement etc. made within spirit of the present utility model and principle, within should be included in protection domain of the present utility model.
Claims (4)
1. a low-power consumption light source, it is characterized in that: include constant temperature zone (1), the high-frequency oscillating circuits (2) of improvement it is provided with in described constant temperature zone (1), the high-frequency oscillating circuits (2) of described improvement is connected by circuit excitation coil (3), described excitation coil (3) groove is provided with spectrum bulb (4), described spectrum bulb (4) right side is provided with neutral colour filter (5), described neutral colour filter (5) right side is provided with lens (6), and described lens (6) right side is cavity bubble system (7)；The light that described spectrum bulb (4) sends is directional light (8) by lens (6) post polymerization through neutral colour filter (5) afterwards.
A kind of low-power consumption light source the most according to claim 1, it is characterised in that: the frequency of oscillation used when the high-frequency oscillating circuits (2) of described improvement works is 110MHz.
A kind of low-power consumption light source the most according to claim 1, it is characterised in that: described lens (6) are convex mirror.
A kind of low-power consumption light source the most according to claim 1, it is characterised in that: described neutral colour filter (5) uses monolithic transparent plastic material to make.
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| CN201620069383.2U CN205430730U (en) | 2016-01-25 | 2016-01-25 | Low -power consumption light source |
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| Publication number | Priority date | Publication date | Assignee | Title |
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| CN105934046A (en) * | 2016-01-25 | 2016-09-07 | 江汉大学 | Low-power light source |
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| CN105934046A (en) * | 2016-01-25 | 2016-09-07 | 江汉大学 | Low-power light source |
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Granted publication date: 20160803 Termination date: 20190125 |