CN111828878A - Strong light simulation light source lighting device - Google Patents
Strong light simulation light source lighting device Download PDFInfo
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- CN111828878A CN111828878A CN202010737042.9A CN202010737042A CN111828878A CN 111828878 A CN111828878 A CN 111828878A CN 202010737042 A CN202010737042 A CN 202010737042A CN 111828878 A CN111828878 A CN 111828878A
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F21—LIGHTING
- F21S—NON-PORTABLE LIGHTING DEVICES; SYSTEMS THEREOF; VEHICLE LIGHTING DEVICES SPECIALLY ADAPTED FOR VEHICLE EXTERIORS
- F21S8/00—Lighting devices intended for fixed installation
- F21S8/006—Solar simulators, e.g. for testing photovoltaic panels
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F21—LIGHTING
- F21V—FUNCTIONAL FEATURES OR DETAILS OF LIGHTING DEVICES OR SYSTEMS THEREOF; STRUCTURAL COMBINATIONS OF LIGHTING DEVICES WITH OTHER ARTICLES, NOT OTHERWISE PROVIDED FOR
- F21V19/00—Fastening of light sources or lamp holders
- F21V19/02—Fastening of light sources or lamp holders with provision for adjustment, e.g. for focusing
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F21—LIGHTING
- F21V—FUNCTIONAL FEATURES OR DETAILS OF LIGHTING DEVICES OR SYSTEMS THEREOF; STRUCTURAL COMBINATIONS OF LIGHTING DEVICES WITH OTHER ARTICLES, NOT OTHERWISE PROVIDED FOR
- F21V21/00—Supporting, suspending, or attaching arrangements for lighting devices; Hand grips
- F21V21/06—Bases for movable standing lamps; Fixing standards to the bases
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F21—LIGHTING
- F21V—FUNCTIONAL FEATURES OR DETAILS OF LIGHTING DEVICES OR SYSTEMS THEREOF; STRUCTURAL COMBINATIONS OF LIGHTING DEVICES WITH OTHER ARTICLES, NOT OTHERWISE PROVIDED FOR
- F21V23/00—Arrangement of electric circuit elements in or on lighting devices
- F21V23/003—Arrangement of electric circuit elements in or on lighting devices the elements being electronics drivers or controllers for operating the light source, e.g. for a LED array
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F21—LIGHTING
- F21V—FUNCTIONAL FEATURES OR DETAILS OF LIGHTING DEVICES OR SYSTEMS THEREOF; STRUCTURAL COMBINATIONS OF LIGHTING DEVICES WITH OTHER ARTICLES, NOT OTHERWISE PROVIDED FOR
- F21V29/00—Protecting lighting devices from thermal damage; Cooling or heating arrangements specially adapted for lighting devices or systems
- F21V29/50—Cooling arrangements
- F21V29/60—Cooling arrangements characterised by the use of a forced flow of gas, e.g. air
- F21V29/67—Cooling arrangements characterised by the use of a forced flow of gas, e.g. air characterised by the arrangement of fans
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- G—PHYSICS
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- G01M—TESTING STATIC OR DYNAMIC BALANCE OF MACHINES OR STRUCTURES; TESTING OF STRUCTURES OR APPARATUS, NOT OTHERWISE PROVIDED FOR
- G01M11/00—Testing of optical apparatus; Testing structures by optical methods not otherwise provided for
- G01M11/02—Testing optical properties
- G01M11/0207—Details of measuring devices
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- G06F16/21—Design, administration or maintenance of databases
- G06F16/217—Database tuning
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F21—LIGHTING
- F21Y—INDEXING SCHEME ASSOCIATED WITH SUBCLASSES F21K, F21L, F21S and F21V, RELATING TO THE FORM OR THE KIND OF THE LIGHT SOURCES OR OF THE COLOUR OF THE LIGHT EMITTED
- F21Y2113/00—Combination of light sources
- F21Y2113/20—Combination of light sources of different form
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Abstract
The invention belongs to the field of optics, and discloses a strong light simulation light source lighting device, which comprises: the system comprises a light source, a reflection optical system, a light source focusing assembly, a light source heat dissipation mechanism, a wind speed acquisition module, a xenon lamp main control system, a xenon lamp electronic ballast, a direct current stabilized power supply, a light source moving platform and a supporting mechanism. When the device works, the light source heat dissipation mechanism, the wind speed acquisition module, the xenon lamp main control system, the xenon lamp electronic ballast and the direct current stabilized power supply are sequentially turned on, the output of the xenon lamp electronic ballast is adjusted, the xenon lamp in the light source is slowly ignited, and the three-axis adjusting mechanism in the light source focusing assembly is adjusted to enable the cathode spot of the xenon lamp in the light source to coincide with the focus of the parabolic reflector in the reflecting optical system and output parallel illumination. The photoelectric parameter measurement requirements of the liquid crystal display in the daylight environment are met by adjusting the output power of the xenon lamp electronic ballast and the direct current stabilized power supply to obtain the environment illumination with different color temperatures and different illumination intensities.
Description
Technical Field
The invention belongs to the technical field of optical metering tests, relates to a strong light simulation light source lighting device, and particularly relates to a strong light simulation light source lighting device for metering tests of luminosity and chromaticity parameters of a liquid crystal display and establishment of a strong light database of the strong light simulation light source lighting device.
Background
In a flight display performance test, a light source lighting device is needed to simulate normal cabin ambient lighting conditions, the illumination range is changed from the lowest ambient lighting illumination of 1.1lx to the range of 86100lx of a sunlight direct-lighting display screen, and the contrast ratio of the illumination and the bright environment of the flight display is tested. In the measurement of luminosity and chromaticity parameters of active matrix liquid crystal display, the tester needs to be equipped with simulated ambient illumination with the illumination as high as 105And the lx illumination light source is used for measuring luminosity and chromaticity parameters such as brightness contrast, diffuse reflectance and the like under the high-ambient-light illumination condition. With the wide application of liquid crystal displays in automobiles, ships and airplanes, the performance index of the liquid crystal display under the irradiation of high-ambient light needs to be accurately evaluated, and the liquid crystal display simulates light for strong lightThe establishment of source lighting devices and strong light databases poses an urgent need.
The current device for simulating the environmental illumination is mainly a solar simulator, utilizes an artificial light source to simulate the sunlight irradiation characteristic, is mainly used for photovoltaic module photoelectric performance parameter testing and space load photoelectric environment testing, and has key technical indexes of irradiance, irradiance unevenness, irradiance instability, spectrum matching, beam collimation angle and the like, and color temperature parameters are not involved. The test method for evaluating the core parameter-spectrum matching characteristic of the performance index of the solar simulator comprises the steps of carrying out relative spectrum distribution test on output light of the solar simulator in a spectral range of 0.3-1.1 mu m by using a spectrum radiometer/spectrometer, and calculating the percentage of the accumulated energy of the segmented spectrum to the accumulated energy of the total spectrum. To reach GB/T6495.9-2006 part 9 of photovoltaic devices: the solar simulator grade requirement specified in the solar simulator performance requirement specification has the defects of complex structure and higher cost due to the use of an off-axis reflecting system, an interference cut-off filter and an optical integrator in the solar simulator, and is not suitable for the field of photometric and colorimetric parameter measurement and test of liquid crystal displays. At present, domestic strong light simulation light source lighting devices for measuring and testing luminosity and chromaticity parameters of liquid crystal displays are mainly environment light simulators which are researched abroad and take metal halide lamps as core devices, and some colleges and research institutions also adopt an integrating sphere light source to simulate non-all-day light environment for brightness contrast testing, for example, in 2013, in the study on the optical performance automatic measurement system of an airborne display, the non-all-day light environment is 10764lx illumination environment provided by a diffused environment light source in the university of Zhejiang university Master academic thesis. The two light sources are difficult to realize the function of wide dynamic range change of color temperature and illumination, and cannot meet the environmental illumination simulation requirements of different color temperatures and different illuminations.
Disclosure of Invention
Objects of the invention
The purpose of the invention is: aiming at the photoelectric parameter measurement requirement of a liquid crystal display under the daylight environment, a strong light simulation light source lighting device is provided.
(II) technical scheme
In order to solve the above technical problem, the present invention provides an illumination device with a strong light simulation light source, comprising: the system comprises a light source, a reflection optical system 2, a light source focusing component 3, a xenon lamp electronic ballast 7 and a direct current stabilized power supply 8; the reflecting optical system 2 comprises a parabolic reflector and four ellipsoidal reflectors, wherein the four ellipsoidal reflectors are symmetrically arranged at the side end of a light outlet of the parabolic reflector in pairs; the light source comprises a high-voltage short-arc xenon lamp and four halogen tungsten lamps, the xenon lamp is transversely arranged at the focus position of the parabolic reflector in the reflection optical system 2, and the halogen tungsten lamps are connected with the focus position of the corresponding elliptic reflector in the reflection optical system 2 through lamp holders; the light source focusing component 3 is connected with a xenon lamp cathode, and adjusts the focus coincidence of a xenon lamp cathode spot in the light source and a parabolic reflector focus in the reflection optical system 2; the xenon lamp electronic ballast 7 is connected with the xenon lamp and is used for starting the xenon lamp and automatically stabilizing the current; the direct current stabilized voltage power supply 8 is connected with four halogen tungsten lamps and provides direct current output for the halogen tungsten lamps; when the lighting device works, the output of the xenon lamp electronic ballast 7 is adjusted, a xenon lamp in a light source is ignited, the light source focusing assembly 3 is adjusted to enable a xenon lamp cathode spot in the light source to coincide with the focus of a parabolic reflector in the reflection optical system 2, parallel illumination is output, and ambient illumination with different color temperatures and different illumination intensities is obtained by adjusting the output power of the xenon lamp electronic ballast 7 and the output power of the direct current stabilized power supply 8.
The xenon lamp is a 5kW short-arc no-reflector xenon lamp, has a color temperature of 6000K, has a continuous spectrum in a visible light band, has a light-emitting interval of 7.5mm, and is used for simulating a strong light illumination environment; the halogen tungsten lamp has the color temperature of 3200K, the voltage of 24V and the power of 100W and is used for simulating the conventional lighting environment.
The parabolic reflector and the ellipsoidal reflector are both made of nickel-based aluminized metal materials, and the thermal expansion coefficients of the substrate and the reflecting film are consistent; the first focus position of the ellipsoid reflector is used for installing a halogen tungsten lamp, the second focus is superposed with the focus of the paraboloid reflector, and the four paths of light emission of the halogen tungsten lamp and the light emission of the xenon lamp are superposed to generate parallel illumination with different color temperatures.
The light source focusing assembly 3 comprises a three-axis adjusting mechanism and a mechanical supporting structure, the mechanical supporting structure is arranged on the three-axis adjusting mechanism, a xenon lamp cathode is fixed on the mechanical supporting structure through a mechanical interface, and a xenon lamp cathode spot in the light source is coincided with a parabolic reflector focus in the reflecting optical system 2 by adjusting the three-axis adjusting mechanism.
Wherein, light source lighting device still includes: and the light source heat dissipation mechanism 4 is arranged at the rear side of the cathode of the xenon lamp and adopts an air cooling mode to reduce the temperature of the xenon lamp.
Wherein, light source lighting device still includes: and the wind speed acquisition module 5 is arranged at the front end of the light source heat dissipation mechanism 4 and is used for acquiring wind speed in real time.
Wherein, light source lighting device still includes: the xenon lamp main control system 6 is respectively connected with the wind speed acquisition module 5 and the xenon lamp electronic ballast 7, the xenon lamp electronic ballast 7 is connected with the xenon lamp, the xenon lamp main control system 6 judges whether the current wind speed can meet the normal heat dissipation requirement or not by reading the wind speed acquired by the wind speed acquisition module 5, and under the condition that the judgment is abnormal, the xenon lamp electronic ballast 7 is alarmed and controlled to automatically close the xenon lamp in the light source.
Wherein, light source lighting device still includes: the light source moving platform and the supporting mechanism 9, the reflection optical system 2, the light source focusing assembly 3, the light source heat dissipation mechanism 4, the wind speed acquisition module 5, the xenon lamp main control system 6 and the direct current stabilized voltage power supply 8 are all installed on the table board of the light source moving platform and the supporting mechanism 9, the light source moving platform and the supporting mechanism 9 adopt an active vibration isolation optical platform, the table board adopts a honeycomb three-layer sandwich structure, the support adopts an integrally fixed support, and the support is provided with trundles, so that the whole lighting device is convenient to move.
The invention also provides a strong light database establishing method based on the strong light simulation light source lighting device, which comprises the following processes:
in a darkroom environment, a spectral radiometer and a standard illuminometer are arranged in an effective illumination area of the high-light simulation illumination device, wherein the spectral radiometer is used for measuring the color temperature of the illumination device, and the standard illuminometer is used for measuring the illuminance;
electrifying and preheating the spectrum radiometer and the standard illuminometer, controlling the output current voltage initial values of the xenon lamp electronic ballast and the direct current stabilized power supply, enabling the color temperature value of the strong light simulation light source lighting device to be 2856k and the illuminance value to be 100lx, and recording the output current voltage values of the xenon lamp electronic ballast and the direct current stabilized power supply at the moment;
the power supply current of the halogen lamp and the xenon lamp is adjusted, so that the high-light simulated light illuminating device simultaneously meets the requirements of color temperature and ambient light illumination under different combinations, and the illumination range is set to be 102lx～105lx and a color temperature range of 2856k to 6500k, recording output current and voltage values of the xenon lamp electronic ballast 7 and the direct current stabilized voltage power supply 8 under different combinations, and establishing a strong light database.
When the spectral radiometer is used for measuring the color temperature of the lighting device, the spectral radiometer is adopted to measure the relative spectral distribution phi (lambda), the tristimulus value of the target simulator is calculated according to a 1931CIE xy chromaticity system, the color coordinates (x and y) of the lighting device with the highlight simulation light source are calculated, and the color temperature value is calculated by a photometric empirical formula (1):
T＝669A4-779A3+3660A2-7047A+5652 (1)
in the formula:
(III) advantageous effects
The strong light simulation light source lighting device provided by the technical scheme has the following beneficial effects:
(1) the light emitted by a halogen tungsten lamp and the light emitted by a xenon lamp are superposed by a reflective optical system consisting of four ellipsoid reflectors and a large-caliber paraboloid reflector to output parallel light with the caliber of phi 500mm, and the output current of a power supply is adjusted to realize the simulated environment illumination output with different color temperatures and different illumination intensities.
(2) Establishing an illumination range of 102lx～105lx and a database of strong light environments with different color temperatures are convenient for quickly adjusting the required ambient light conditions in the measurement test of luminosity and chromaticity parameters of the liquid crystal display.
Drawings
FIG. 1 is a schematic view of the components of the lighting device of the strong light simulation light source of the present invention.
FIG. 2 is a front view of the highlight simulation light source lighting device of the present invention.
FIG. 3 is a flow chart of highlight database creation according to the present invention.
Detailed Description
In order to make the objects, contents and advantages of the present invention clearer, the following detailed description of the embodiments of the present invention will be made in conjunction with the accompanying drawings and examples.
Referring to fig. 1 and 2, the strong light simulation light source lighting device of the invention comprises a light source, a reflection optical system 2, a light source focusing assembly 3, a light source heat dissipation mechanism 4, a wind speed acquisition module 5, a xenon lamp main control system 6, a xenon lamp electronic ballast 7, a direct current stabilized power supply 8, a light source moving platform and a supporting mechanism 9.
The light source comprises a 5kW high-voltage short-arc xenon lamp and four 100W halogen tungsten lamps, and the requirements of different color temperatures on illumination are met through repeated debugging and matching. The xenon lamp is an Osron XBO5kW short-arc xenon lamp without a reflecting cover, has a color temperature of 6000K, has a continuous spectrum in a visible light waveband, has a light-emitting interval of 7.5mm, is arranged at the focus position of a parabolic reflector in the reflecting optical system 2 in a transverse mode, is an ideal point light source, and is used for simulating a strong light illumination environment. The halogen tungsten lamp adopts an Osram 64657 bulb, the color temperature is 3200K, the voltage is 24V, the power is 100W, and the halogen tungsten lamp is connected with the focus position of a corresponding ellipsoid reflecting mirror arranged in the reflecting optical system 2 through a lamp holder and used for simulating the conventional lighting environment.
The reflecting optical system 2 comprises a parabolic reflector and four ellipsoidal reflectors, wherein the four ellipsoidal reflectors are symmetrically arranged at the side end of a light outlet of the parabolic reflector in pairs. The parabolic reflector and the ellipsoidal reflector are made of nickel-based aluminized metal materials, the thermal expansion coefficients of the substrate and the reflecting film are consistent, and the film stripping probability caused by thermal expansion and cold contraction is reduced; the aperture of the parabolic reflector is 508mm, and a high-pressure short-arc xenon lamp is installed at the focus position in a transverse mode parallel to the light source moving platform; the aperture of the ellipsoidal reflector is 100mm, the first focus is used for installing a halogen tungsten lamp, and the second focus is superposed with the focus of the paraboloidal reflector, so that the light emission of the four-way halogen tungsten lamp and the light emission of the xenon lamp are superposed to generate parallel illumination with different color temperatures.
The light source focusing assembly 3 comprises a three-axis adjusting mechanism and a mechanical supporting structure, the mechanical supporting structure is arranged on the three-axis adjusting mechanism, a xenon lamp cathode is fixed on the mechanical supporting structure through a mechanical interface, and a xenon lamp cathode spot in the light source is coincided with a parabolic reflector focus in the reflecting optical system 2 by adjusting the three-axis adjusting mechanism.
When a 5kW xenon lamp in a light source normally works, the temperature in the glass shell is very high, forced air cooling needs to be applied to the outside for heat dissipation, the light source heat dissipation mechanism 4 is arranged on the rear side of the cathode of the xenon lamp in an air cooling mode, the heat dissipation air cooling is provided by a high-power centrifugal fan, the wind speed is more than 10m/s, and the heat dissipation mechanism is used for reducing the temperature of the xenon lamp and ensuring the stability of a lighting device.
Whether the wind speed generated by the fan is normal or not determines the safe operation of the whole device, and the wind speed acquisition module 5 is arranged at the position 5cm away from the front end of the light source heat dissipation mechanism 4 to acquire the wind speed in real time.
The xenon lamp main control system 6 is respectively connected with the wind speed acquisition module 5 and the xenon lamp electronic ballast 7, the xenon lamp electronic ballast 7 is connected with the xenon lamp, the xenon lamp main control system 6 judges whether the current wind speed can meet the normal heat dissipation requirement or not by reading the wind speed acquired by the wind speed acquisition module 5, and under the condition of judging that the current wind speed is abnormal, the xenon lamp main control system gives an alarm in time and controls the xenon lamp electronic ballast 7 to automatically close the xenon lamp in the light source. For example: when the wind speed is lower than 10m/s, the heat dissipation capacity cannot meet the requirement, and the xenon lamp main control system forcibly turns off the power supply of the xenon lamp and gives an alarm.
The xenon lamp electronic ballast 7 consists of a xenon lamp power supply and a high-voltage trigger; the xenon lamp power supply adopts a low-voltage high-current working mode, has an automatic current stabilizing function and adjustable current, and has the current stability superior to +/-0.05 percent; the high-voltage trigger generates a high voltage of 30-65 kV when the xenon lamp light source is started and applies the high voltage to two ends of the xenon lamp tube, so that xenon in the xenon lamp tube breaks down and conducts electricity.
Light source moving platform and supporting mechanism 9 are used for installing above-mentioned each subassembly, adopt high accuracy initiative vibration isolation optical platform, and the mesa adopts honeycomb three-layer sandwich structure, according to 25mm pitch-row equipartition M6 screw hole, easy to assemble light source subassembly, mesa size: 1.2 m.times.0.6 m; the support adopts the integral fixed support, and the support takes the truckle, makes things convenient for whole lighting device to remove.
The DC stabilized power supply 8 is connected with four halogen tungsten lamps in the light source to provide DC output of 30V and 20A at most for the halogen tungsten lamps.
The reflection optical system 2, the light source focusing assembly 3, the light source heat dissipation mechanism 4, the wind speed acquisition module 5, the xenon lamp main control system 6 and the direct current stabilized power supply 8 are all arranged on the table top of the light source moving platform and the supporting mechanism 9.
When the strong light simulation light source lighting device works, the light source heat dissipation mechanism 4, the wind speed acquisition module 5, the xenon lamp main control system 6, the xenon lamp electronic ballast 7 and the direct current stabilized power supply 8 are sequentially turned on, the output of the xenon lamp electronic ballast 7 is adjusted, the xenon lamp in the light source is slowly ignited, the three-axis adjusting mechanism in the light source focusing assembly 3 is adjusted to enable the cathode spot of the xenon lamp in the light source to coincide with the focus of the parabolic reflector in the reflection optical system 2, and parallel illumination is output. The environment illumination with different color temperatures and different illumination intensities is obtained by adjusting the output power of the xenon lamp electronic ballast 7 and the direct current stabilized voltage power supply 8.
In a darkroom environment, a spectral radiometer and a standard illuminometer are arranged in an effective illumination area of the high-light simulation light illuminating device, wherein the spectral radiometer is used for measuring the color temperature of the illuminating device, and the standard illuminometer is used for measuring the illuminance.
As shown in fig. 3, the spectral radiometer and the standard illuminometer are powered on and preheated, the output current and voltage initial values of the xenon lamp electronic ballast and the dc regulated power supply are controlled, the color temperature value of the strong light simulation light source lighting device is 2856k, the illuminance value is 100lx, and the output current and voltage values of the xenon lamp electronic ballast and the dc regulated power supply at this time are recorded. The power supply currents of the halogen lamp and the xenon lamp are repeatedly adjusted, so that the high-light simulated light illuminating device simultaneously meets the requirements of color temperature and ambient illuminance under different combinations, and the illumination range is set to be 102lx～105lx and a color temperature range of 2856k to 6500k, recording output current and voltage values of the xenon lamp electronic ballast 7 and the direct current stabilized voltage power supply 8 under different combinations, and establishing a strong light database.
The strong light database is established by adopting a spectral radiometer and a standard illuminometer to accurately test the illuminance, the color temperature and the like of the designed and developed light source lighting device, and the current and the voltage of a power supply system are repeatedly debugged, so that a strong light source formed by combining a halogen lamp and a xenon lamp meets the color temperature requirement of a standard illuminator specified by CIE.
The color temperature test method of the lighting device with the strong light simulation light source comprises the steps of measuring relative spectral distribution phi (lambda) by using a spectral radiometer, calculating tristimulus values of a target simulator according to a 1931CIE xy chromaticity system, calculating color coordinates (x and y) of the lighting device with the strong light simulation light source according to the tristimulus values, and calculating the color temperature value according to a photometry empirical formula (1) shown in a photometry textbook.
T＝669A4-779A3+3660A2-7047A+5652 (1)
In the formula:
finally, the standard illuminometer directly tests the illuminance of the light source to obtain the output illumination and color temperature values of the high-light simulation light source lighting device under different output currents of the xenon lamp power supply and different output currents of the halogen lamp direct current stabilized power supply, and the illumination range is set to be 102lx～105lx and a strong light environment database with the color temperature range of 2856k to 6500 k.
The above description is only a preferred embodiment of the present invention, and it should be noted that, for those skilled in the art, several modifications and variations can be made without departing from the technical principle of the present invention, and these modifications and variations should also be regarded as the protection scope of the present invention.
Claims (10)
1. An apparatus for simulating the illumination of a light source with high intensity, comprising: the device comprises a light source, a reflection optical system (2), a light source focusing assembly (3), a xenon lamp electronic ballast (7) and a direct current stabilized power supply (8); the reflecting optical system (2) comprises a parabolic reflector and four ellipsoidal reflectors, wherein the four ellipsoidal reflectors are symmetrically arranged at the side end of a light outlet of the parabolic reflector in pairs; the light source comprises a high-voltage short-arc xenon lamp and four halogen tungsten lamps, the xenon lamp is transversely arranged at the focus position of the parabolic reflector in the reflection optical system (2), and the halogen tungsten lamps are connected with the focus position of the corresponding elliptic reflector in the reflection optical system (2) through lamp holders; the light source focusing assembly (3) is connected with a xenon lamp cathode, and the focus of a parabolic reflector in the reflection optical system (2) is coincided with the xenon lamp cathode spot in the light source; the xenon lamp electronic ballast (7) is connected with the xenon lamp and is used for starting the xenon lamp and automatically stabilizing the current; the direct current stabilized voltage supply (8) is connected with the four halogen tungsten lamps and provides direct current output for the halogen tungsten lamps; when the lighting device works, the output of the xenon lamp electronic ballast (7) is adjusted, a xenon lamp in the light source is ignited, the light source focusing assembly (3) is adjusted to enable a xenon lamp cathode spot in the light source to coincide with the focus of the parabolic reflector in the reflection optical system (2), parallel illumination is output, and ambient illumination with different color temperatures and different illumination intensities is obtained by adjusting the output power of the xenon lamp electronic ballast (7) and the direct current stabilized power supply (8).
2. The strong light simulation light source lighting device according to claim 1, wherein a 5kW short arc no-reflector xenon lamp is selected as the xenon lamp, the color temperature is 6000K, the continuous spectrum is provided in a visible light band, the light emitting interval is 7.5mm, and the strong light simulation light source lighting device is used for simulating a strong light illumination environment; the halogen tungsten lamp has the color temperature of 3200K, the voltage of 24V and the power of 100W and is used for simulating the conventional lighting environment.
3. The strong light simulation light source lighting device according to claim 2, wherein the parabolic reflector and the ellipsoidal reflector are made of nickel-based aluminized metal material, and the thermal expansion coefficients of the substrate and the reflective film are consistent; the first focus position of the ellipsoid reflector is used for installing a halogen tungsten lamp, the second focus is superposed with the focus of the paraboloid reflector, and the four paths of light emission of the halogen tungsten lamp and the light emission of the xenon lamp are superposed to generate parallel illumination with different color temperatures.
4. The glare simulation light source lighting device according to claim 3, wherein the light source focusing assembly (3) comprises a three-axis adjusting mechanism and a mechanical support structure, the mechanical support structure is arranged on the three-axis adjusting mechanism, the xenon lamp cathode is fixed on the mechanical support structure through a mechanical interface, and the three-axis adjusting mechanism is adjusted to enable the xenon lamp cathode spot in the light source to coincide with the focus of the parabolic reflector in the reflection optical system 2.
5. The glare analog light source illumination device of claim 4, further comprising: and the light source heat dissipation mechanism (4) is arranged at the rear side of the cathode of the xenon lamp and adopts an air cooling mode to reduce the temperature of the xenon lamp.
6. The glare analog light source illumination device of claim 5, further comprising: and the wind speed acquisition module (5) is arranged at the front end of the light source heat dissipation mechanism (4) and is used for acquiring wind speed in real time.
7. The glare analog light source illumination device of claim 6, further comprising: the xenon lamp main control system (6) is respectively connected with the wind speed acquisition module (5) and the xenon lamp electronic ballast (7), the xenon lamp electronic ballast (7) is connected with the xenon lamp, the xenon lamp main control system (6) judges whether the current wind speed can meet the normal heat dissipation requirement or not by reading the wind speed acquired by the wind speed acquisition module (5), and under the condition of judging that the abnormality exists, the xenon lamp electronic ballast (7) is alarmed and controlled to automatically close the xenon lamp in the light source.
8. The glare analog light source illumination device of claim 7, further comprising: light source moving platform and supporting mechanism (9), reflection optical system (2), light source focusing subassembly (3), light source heat dissipation mechanism (4), wind speed acquisition module (5), xenon lamp major control system (6) and direct current constant voltage power supply (8) are all installed on the mesa of light source moving platform and supporting mechanism (9), light source moving platform and supporting mechanism (9) adopt initiative vibration isolation optical platform, the mesa adopts honeycomb three-layer sandwich structure, the support adopts the monolithic stationary support, the support takes the truckle, make things convenient for whole lighting device to remove.
9. A strong light database establishment method for a strong light simulation light source illumination device according to claim 8, characterized by comprising the following processes:
in a darkroom environment, a spectral radiometer and a standard illuminometer are arranged in an effective illumination area of the high-light simulation illumination device, wherein the spectral radiometer is used for measuring the color temperature of the illumination device, and the standard illuminometer is used for measuring the illuminance;
electrifying and preheating the spectrum radiometer and the standard illuminometer, controlling the output current voltage initial values of the xenon lamp electronic ballast and the direct current stabilized power supply, enabling the color temperature value of the strong light simulation light source lighting device to be 2856k and the illuminance value to be 100lx, and recording the output current voltage values of the xenon lamp electronic ballast and the direct current stabilized power supply at the moment;
the power supply current of the halogen lamp and the xenon lamp is adjusted, so that the high-light simulated light illuminating device simultaneously meets the requirements of color temperature and ambient light illumination under different combinations, and the illumination range is set to be 102lx～105lx and a color temperature range of 2856k to 6500k, recording output current and voltage values of the xenon lamp electronic ballast 7 and the direct current stabilized voltage power supply 8 under different combinations, and establishing a strong light database.
10. The highlight database creation method according to claim 9, wherein when the spectral radiometer is used for color temperature measurement of the lighting device, the spectral radiometer is used to measure the relative spectral distribution Φ (λ), the tristimulus values of the target simulator are calculated according to the 1931CIE xy chromaticity system, thereby calculating the color coordinates (x, y) of the lighting device with the highlight simulation light source, and the color temperature value is calculated by the photometric empirical formula (1):
T＝669A4-779A3+3660A2-7047A+5652 (1)
in the formula:
Priority Applications (1)
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| CN111828878B (en) | 2022-04-05 |
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