CN101539273A - Isochromatic and isothermic continuous dimming device based on integrating sphere - Google Patents
Isochromatic and isothermic continuous dimming device based on integrating sphere Download PDFInfo
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- CN101539273A CN101539273A CN200910066901A CN200910066901A CN101539273A CN 101539273 A CN101539273 A CN 101539273A CN 200910066901 A CN200910066901 A CN 200910066901A CN 200910066901 A CN200910066901 A CN 200910066901A CN 101539273 A CN101539273 A CN 101539273A
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Abstract
The invention relates to an isochromatic and isothermic continuous dimming device based on an integrating sphere, comprising the integrating sphere, a light source and a guide way. The integrating sphere is internally provided with a baffle screen; an optical window and a light through hole are arranged on the sphere wall of the integrating sphere; the optical window and the light through hole are respectively arranged at the two sides of the baffle screen; the light source is a movable light source which is arranged on the guide way; and the movable light source is as high as the centre of the light through hole on the wall of the integrating sphere. Under a condition that the light intensity of the movable light source stays the same, according to the low of inverse distance to a power, the invention leads the movable light source to move on the guide way, changes a distance from the light source to the integrating sphere, leads illuminance which is received at the inner wall of the integrating sphere to correspondingly change, and changes a luminance brightness value which is output from the optical window of the integrating sphere, so as to realize isochromatic and isothermic continuous dimming.
Description
Technical field
The present invention relates to a kind of light modulating device, particularly a kind of Isochromatic and isothermic continuous dimming device based on integrating sphere.
Background technology
Integrating sphere is the cavity spheroid that an inwall scribbles diffuse-reflective material, has very excellent spoke brightness output face uniformity with it as light source, be a kind of diffusion extended source of comparatively desirable approximate lambert's body, it is widely used in fields such as the test of optical pickocff optical parametric and radiation calibration.
The Chinese patent communique discloses a kind of " based on the sun simulation device of integrating sphere " (open day: on September 26th, 2007; Publication number CN101042209A), this device comprises light source, integrating sphere; Described light source (being generally halogen tungsten lamp or xenon lamp) places the integrating sphere centre of sphere or ball wall position, has optical window on the integrating sphere ball wall; Baffle plate is positioned at integrating sphere inside, and between placement and light source and the optical window, to prevent that light is not through the reflection of integrating sphere inwall and directly from the optical window outgoing.This device fully uses the uniform characteristics of integrating sphere output illumination, realizes the simulation to sun output.This device is when testing and calibrating optical pickocff, and the adjusting of integrating sphere brightness output dynamic range generally is to realize by the method for regulating source current and the quantity that changes light source.Change source current, the integrating sphere output spectrum is distributed change, promptly colour temperature changes, and also can bring certain influence to stability of light source; Although and the quantity that changes light source does not change colour temperature, but because it can't be regulated continuously, so can not accurately simulate specific spoke brightness scenery target, and the increase of quantity of light source also increased the complexity of light-source structure, and design brings certain difficulty to system.
Summary of the invention
The technical problem to be solved in the present invention provides a kind ofly can regulate the brightness dynamic range continuously and not change the Isochromatic and isothermic continuous dimming device based on integrating sphere of colour temperature.
In order to solve the problems of the technologies described above, the Isochromatic and isothermic continuous dimming device based on integrating sphere of the present invention comprises integrating sphere, light source and guide rail; The inner baffle plate of placing of integrating sphere; Have optical window and light hole on the described integrating sphere ball wall; Optical window and light hole lay respectively at the both sides of baffle plate; Described light source is the mobile light source that is positioned on the guide rail, and the light hole center on this mobile light source and the integrating sphere ball wall is contour.
According to the square distance law of reciprocity, under the situation that light source intensity remains unchanged, the illuminance of being shone the surface perpendicular to the light direction of propagation, be inversely proportional to the square distance from the light source to the receiving plane, thereby can change the size of integrating sphere spoke brightness output by the distance that changes mobile light source and integrating sphere.
The present invention according to the square distance law of reciprocity, moves mobile light source under the situation that mobile light source intensity remains unchanged on guide rail, change the distance of light source to integrating sphere; Between optical window and light hole, place baffle plate, to prevent that light is not through the reflection of integrating sphere inwall and directly from the optical window outgoing, corresponding change can take place in the illuminance that the integrating sphere inwall receives, and then changes the brightness values of integrating sphere optical window place output, thereby can realize Isochromatic and isothermic continuous dimming.
Described light source also comprises at least one fixed light source; Fixed light source is placed on the integrating sphere inner wall position, and lays respectively at the both sides of baffle plate with optical window.
Described mobile light source and fixed light source adopt the D.C. regulated power supply power supply.
Described mobile light source and fixed light source can all adopt xenon lamp or halogen tungsten lamp.
Isochromatic and isothermic continuous dimming device based on integrating sphere of the present invention can also comprise runner; Distributing on the described runner, at least one is equipped with the through hole of neutral attenuator, and rotating wheel can make the position of the different neutral attenuator of each transmitance corresponding with the light hole position on the integrating sphere successively.
Described neutral attenuator is chosen the neutral attenuator of no spectral selection (the spectrum transmitting rate curve is straight).
Described mobile light source adopts stepper motor to drive on guide rail and moves.
Described runner adopts stepper motor to drive and rotates, and can realize the switching between the different neutral attenuators.
Described stepper motor adopts the D.C. regulated power supply power supply.
Operation principle explanation of the present invention: mobile light source is placed on the guide rail, and does rectilinear motion along guide rail by the stepper motor drive.The light hole center of the center of mobile light source and integrating sphere one side is contour.The light that mobile light source sends enters integrating sphere through neutral attenuator and light hole, according to the square distance law of reciprocity, under the situation that mobile light source intensity remains unchanged, change the distance of mobile light source to integrating sphere, corresponding change can take place in the illuminance that the integrating sphere inwall receives, and then changes integrating sphere optical window place brightness output value.
Because the present invention utilizes D.C. regulated power supply to keep light source power constant, promptly light source intensity remains unchanged, so in whole light modulation process, integrating sphere output colour temperature keeps constant, the colour temperature light modulation such as has realized.In addition, the simple mode that changes mobile light source position and change brightness output that relies on, the length of guide rail is longer, adopts the neutral attenuator of different transmitances that light is decayed here for this reason, can effectively reduce the length of guide rail like this, thereby realize the miniaturization of device.For guaranteeing the constant of colour temperature output, neutral attenuator must be chosen the neutral attenuator of no spectral selection (the spectrum transmitting rate curve is straight).
Consider in the process that optical pickocff is tested and calibrated, need target source that bigger dynamic range output is arranged, thereby keep the fixed light source on the integrating sphere inwall.
In addition, on the guide rail that mobile light source is placed, driven by stepper motor, its distance that moves can accurately be controlled, and realizes the continuous output of spoke brightness.
The present invention can also comprise feedback device, monitors and adjust the illumination of integrating sphere inwall in real time.
Compact conformation of the present invention, controllability is strong.Take the mode of fixed light source, mobile light source and neutral attenuator cooperating, the adjusting range of integrating sphere output is very big, has realized the continuous output than great dynamic range.Because light source voltage do not change, and what adopt is to the relative spectral characteristic neutral attenuator of influence not, thereby in whole light modulation process, integrating sphere output colour temperature remains constant, the colour temperature light modulation such as has realized.
Description of drawings
Below in conjunction with the drawings and specific embodiments the present invention is described in further detail.
Fig. 1 is the Isochromatic and isothermic continuous dimming device structural representation based on integrating sphere of the present invention.
The specific embodiment
As shown in Figure 1, the Isochromatic and isothermic continuous dimming device based on integrating sphere of the present invention comprises integrating sphere 3, D.C. regulated power supply 9, light source, guide rail 7, stepper motor 10, runner 5, neutral attenuator 6.Described light source is because its position difference is divided into fixed light source 1 and mobile light source 8, and fixed light source 1 and mobile light source 8 adopt xenon lamp fully or adopt halogen tungsten lamp fully.Have a hole on the sidewall of integrating sphere 3 as optical window 4 (optical window area be no more than integrating sphere surface area 1/36); Guide rail 7, runner 5, two stepper motors 10 and D.C. regulated power supply 9 can be installed on the support.Fixed light source 1 can be selected halogen tungsten lamp or xenon lamp for use, chooses among the figure on 4 sidewalls that are placed on integrating sphere 3, and its direction towards optical window 4 is placed baffle plate (not drawing among the figure), to prevent that light is through the reflection of integrating sphere 3 inwalls and directly from optical window 4 outgoing.Open an aperture at integrating sphere 3 tops and can be used for placing feedback device 2, be used for monitoring in real time and adjust the irradiation level of integrating sphere 3 inwalls.On integrating sphere 3 sidewalls, open a light hole 11, the size of light hole 11 should with the consistent size of neutral attenuator 6.Neutral attenuator 6 is placed in the through hole of runner 5, drives the switching that can carry out between the neutral attenuator 6 of different transmitances by stepper motor, and each switching position should be over against the light hole 11 of integrating sphere 3 sidewalls.Guide rail 7 is fixed on a side of light hole 11, and mobile light source 8 is placed on the guide rail 7, makes its center and light hole 11 centers contour, is driven by stepper motor and does rectilinear motion along guide rail 7.For guaranteeing the stable of the photochromic temperature of output, choosing of mobile light source 8 should be consistent with fixed light source 1, be all halogen tungsten lamp or xenon lamp, but lamp power can be selected as required.Fixed light source 1, mobile light source 8 and stepper motor are responsible for power supply by D.C. regulated power supply 9.
The process that the present invention realizes Isochromatic and isothermic continuous dimming cooperates by fixed light source 1, mobile light source 8 and neutral attenuator 6 threes to be finished.Descending with brightness output below is example, introduces the Isochromatic and isothermic continuous dimming process of whole device:
1. open all light sources, comprise fixed light source 1 and mobile light source 8.Open feedback device, monitor the irradiation level of integrating sphere 3 inwalls in real time.
2. mobile light source 8 is moved to guide rail 7 near points (near integrating sphere 3 light hole positions), rotating wheel 5 makes the neutral attenuator 6 of transmitance maximum (reserve through hole usually on runner 5 simultaneously, make that transmitance is maximum) over against light hole 11, this moment, optical window 4 place's brightness outputs were maximum.
3. mobile light source 8 is moved to far point (away from integrating sphere 3 light hole positions) by near point along guide rail 7, in this process, optical window 4 place's brightness outputs reduce gradually.
4. after mobile light source 8 moved to the far point position, rotating wheel 5 made transmitance be only second to peaked neutral attenuator 6 over against light hole 11.Mobile light source 8 returns back to the near point position, and continues from the close-by examples to those far off to move along guide rail 7, and this moment, optical window 4 place's brightness outputs continued to reduce.
5. continue to change neutral attenuator 6, repeat light modulation step 3 and 4 up to changing till the neutral attenuator 6 of transmitance minimum.
One by one close fixed light source 1, repeat light modulation step 2,3,4,5, make optical window 4 place's brightness outputs continue to reduce, till closing all fixed light sources 1.
7. close when all fixed light sources 1, the neutral attenuator 6 of transmitance minimum is over against light hole 11, and mobile light source 8 is when guide rail 7 far point positions, and optical window 4 place's brightness outputs are minimum of a value.
Claims (6)
1, a kind of Isochromatic and isothermic continuous dimming device based on integrating sphere comprises integrating sphere (3), light source; Have optical window (4) on described integrating sphere (3) the ball wall, the inner baffle plate of placing; It is characterized in that also comprising guide rail (7); Also have light hole (11) on described integrating sphere (3) the ball wall; Optical window (4) and light hole (11) lay respectively at the both sides of baffle plate; Light source is the mobile light source (8) that is positioned on the guide rail, and this mobile light source (8) is contour with light hole (11) center on integrating sphere (3) the ball wall.
2, the Isochromatic and isothermic continuous dimming device based on integrating sphere according to claim 1 is characterized in that described mobile light source (8) adopts stepper motor to drive at guide rail (7) and upward moves.
3, the Isochromatic and isothermic continuous dimming device based on integrating sphere according to claim 1 is characterized in that described light source also comprises at least one fixed light source (1); Fixed light source (1) is placed on integrating sphere (3) inner wall position, and lays respectively at the both sides of baffle plate with optical window (4).
4, the Isochromatic and isothermic continuous dimming device based on integrating sphere according to claim 3 is characterized in that described mobile light source (8) and fixed light source (1) adopt the D.C. regulated power supply power supply.
5, the Isochromatic and isothermic continuous dimming device based on integrating sphere according to claim 3 is characterized in that described mobile light source (8) and fixed light source (1) all adopt xenon lamp or halogen tungsten lamp.
6, according to claim 1 or the described Isochromatic and isothermic continuous dimming device of 3 any claims, it is characterized in that also comprising runner (5) based on integrating sphere; Described runner (5) is gone up distribution, and at least one is equipped with the through hole of neutral attenuator, and rotating wheel (5) can make the position of the different neutral attenuator of each transmitance corresponding with light hole (11) position on the integrating sphere successively.
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| Application Number | Priority Date | Filing Date | Title |
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| CN200910066901XA CN101539273B (en) | 2009-05-05 | 2009-05-05 | Isochromatic and isothermic continuous dimming device based on integrating sphere |
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| CN200910066901XA CN101539273B (en) | 2009-05-05 | 2009-05-05 | Isochromatic and isothermic continuous dimming device based on integrating sphere |
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| CN101539273A true CN101539273A (en) | 2009-09-23 |
| CN101539273B CN101539273B (en) | 2010-10-27 |
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Cited By (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101813455A (en) * | 2010-04-13 | 2010-08-25 | 中国科学院长春光学精密机械与物理研究所 | Target source with adjustable contrast ratio |
| CN101846528A (en) * | 2010-04-13 | 2010-09-29 | 中国科学院长春光学精密机械与物理研究所 | Detection method for capture capability of photoelectric tracking equipment to target with low contrast |
| CN102519017A (en) * | 2011-12-28 | 2012-06-27 | 北京奥博泰科技有限公司 | High color temperature continuously adjustable uniform light source device and method |
| CN102657510A (en) * | 2012-05-04 | 2012-09-12 | 中国计量科学研究院 | Device for generating observation target with illumination and color |
| CN103375773A (en) * | 2012-04-12 | 2013-10-30 | 鼎众股份有限公司 | Color temperature adjusting device of operating lamp |
| CN104378861A (en) * | 2014-11-14 | 2015-02-25 | 中国科学院西安光学精密机械研究所 | Black body light source with adjustable color temperature and color temperature adjusting method for same |
| CN104601983A (en) * | 2014-12-25 | 2015-05-06 | 中国科学院长春光学精密机械与物理研究所 | Device for testing absolute spectrum transmittance and uniformity thereof of off-axis multi-lens space camera |
| CN105866077A (en) * | 2016-03-21 | 2016-08-17 | 广东顺德工业设计研究院(广东顺德创新设计研究院) | Time-resolved fluorescence analysis system and detection apparatus |
-
2009
- 2009-05-05 CN CN200910066901XA patent/CN101539273B/en not_active Expired - Fee Related
Cited By (9)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101813455A (en) * | 2010-04-13 | 2010-08-25 | 中国科学院长春光学精密机械与物理研究所 | Target source with adjustable contrast ratio |
| CN101846528A (en) * | 2010-04-13 | 2010-09-29 | 中国科学院长春光学精密机械与物理研究所 | Detection method for capture capability of photoelectric tracking equipment to target with low contrast |
| CN102519017A (en) * | 2011-12-28 | 2012-06-27 | 北京奥博泰科技有限公司 | High color temperature continuously adjustable uniform light source device and method |
| CN103375773A (en) * | 2012-04-12 | 2013-10-30 | 鼎众股份有限公司 | Color temperature adjusting device of operating lamp |
| CN102657510A (en) * | 2012-05-04 | 2012-09-12 | 中国计量科学研究院 | Device for generating observation target with illumination and color |
| CN102657510B (en) * | 2012-05-04 | 2014-12-03 | 中国计量科学研究院 | Device for generating observation target with illumination and color |
| CN104378861A (en) * | 2014-11-14 | 2015-02-25 | 中国科学院西安光学精密机械研究所 | Black body light source with adjustable color temperature and color temperature adjusting method for same |
| CN104601983A (en) * | 2014-12-25 | 2015-05-06 | 中国科学院长春光学精密机械与物理研究所 | Device for testing absolute spectrum transmittance and uniformity thereof of off-axis multi-lens space camera |
| CN105866077A (en) * | 2016-03-21 | 2016-08-17 | 广东顺德工业设计研究院(广东顺德创新设计研究院) | Time-resolved fluorescence analysis system and detection apparatus |
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| CN101539273B (en) | 2010-10-27 |
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Granted publication date: 20101027 Termination date: 20120505 |