CN111060461B - Light source control equipment and method based on temperature feedback - Google Patents
Light source control equipment and method based on temperature feedback Download PDFInfo
- Publication number
- CN111060461B CN111060461B CN201911418069.5A CN201911418069A CN111060461B CN 111060461 B CN111060461 B CN 111060461B CN 201911418069 A CN201911418069 A CN 201911418069A CN 111060461 B CN111060461 B CN 111060461B
- Authority
- CN
- China
- Prior art keywords
- light
- light source
- lens
- temperature
- light beam
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Active
Links
Images
Classifications
-
- G—PHYSICS
- G01—MEASURING; TESTING
- G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
- G01N21/00—Investigating or analysing materials by the use of optical means, i.e. using sub-millimetre waves, infrared, visible or ultraviolet light
- G01N21/17—Systems in which incident light is modified in accordance with the properties of the material investigated
- G01N21/25—Colour; Spectral properties, i.e. comparison of effect of material on the light at two or more different wavelengths or wavelength bands
- G01N21/255—Details, e.g. use of specially adapted sources, lighting or optical systems
-
- G—PHYSICS
- G01—MEASURING; TESTING
- G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
- G01N21/00—Investigating or analysing materials by the use of optical means, i.e. using sub-millimetre waves, infrared, visible or ultraviolet light
- G01N21/01—Arrangements or apparatus for facilitating the optical investigation
-
- G—PHYSICS
- G01—MEASURING; TESTING
- G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
- G01N21/00—Investigating or analysing materials by the use of optical means, i.e. using sub-millimetre waves, infrared, visible or ultraviolet light
- G01N21/01—Arrangements or apparatus for facilitating the optical investigation
- G01N2021/0106—General arrangement of respective parts
- G01N2021/0112—Apparatus in one mechanical, optical or electronic block
Abstract
The invention discloses a light source control device and method based on temperature feedback. The temperature feedback component is used for monitoring the temperature of the emission light source; the third lens is used for converting the light emitted by the point light source into parallel light; the fourth lens is used for transmitting the parallel light to the light splitting component; the light splitting component is used for splitting the parallel light into a first path of light beam and a second path of light beam, transmitting the first path of light beam to a target object, and reflecting the second path of light beam to the image receiving device; the second feedback controller is used for extracting characteristic data in the image, determining optical parameters of the second path of light beam based on the characteristic data, and adjusting the optical parameters of the first path of light beam transmitted to the target object based on the optical parameters of the second path of light beam. The invention can adjust the optical parameters of the light source irradiating the substance to be measured and also can give consideration to the heating problem of the emission light source.
Description
Technical Field
The invention relates to a spectrum analysis technology, in particular to a light source control device and a light source control method based on temperature feedback.
Background
When the spectral analysis is carried out on the substance to be detected by adopting the spectroscopic method, if the substance to be detected is irradiated by a light source with fixed light intensity, the emergent light penetrating through the substance to be detected is often weak or strong. If the emergent light is weak, the signal to noise ratio of the spectrum collected by the spectrometer is poor; if the emergent light is strong, the spectrometer collecting the emergent light can be saturated. Common devices for adjusting the intensity of the light source, such as a light attenuation device and an integrating sphere, can only weaken the light intensity of the emitting light source. There is no way to increase the light intensity unless the light source is replaced, however, replacing the light source greatly affects the measurement. Thus, scientists often increase the light intensity by various means, such as increasing the driving voltage or current of the emitting light source, which may cause the problem that the larger the light intensity is, the more the power consumption of the emitting light source is, and the more the heat generation is, so that the light intensity of the emitted light does not change with the threshold value set by us.
Therefore, it is necessary to find a technical solution that can adjust the optical parameters of the light source irradiating the substance to be measured and also can simultaneously address the problem of heat generation of the emitting light source.
Disclosure of Invention
The invention aims to overcome the defects in the prior art and provide a light source control device and a light source control method based on temperature feedback, which can adjust the optical parameters of a light source irradiating a substance to be detected and also can solve the problem of heat generation of an emission light source.
The technical scheme adopted by the invention is as follows: a light source control device based on temperature feedback comprises a temperature feedback assembly, a light source assembly, a shading cylinder, a third lens, a fourth lens, a light splitting assembly, an image receiving device, a second feedback controller and a light source driving assembly; wherein the content of the first and second substances,
the light source assembly is used for converting an emission light source into a point light source; the light source component is arranged in the shading cylinder;
the light source driving component is used for driving the emission light source to enable the emission light source to emit light;
the temperature feedback assembly is used for monitoring the temperature of the emission light source and avoiding the light intensity change of the emitted light caused by overhigh temperature of the emission light source;
the third lens is used for converting the light emitted by the point light source into parallel light;
the fourth lens is used for transmitting the parallel light obtained by the third lens to the light splitting component;
the light splitting component is used for splitting the parallel light passing through the fourth lens into a first path of light beam and a second path of light beam, transmitting the first path of light beam to a target object, and reflecting the second path of light beam to the image receiving device;
the image receiving device is used for collecting the second path of light beam to obtain an image;
the second feedback controller is used for extracting characteristic data in the image; determining the optical parameters of the second light beam based on the extracted characteristic data; and adjusting the optical parameters of the first path of light beam transmitted to the target object based on the optical parameters of the second path of light beam.
Further, the light source assembly comprises:
a first lens for converting light emitted from the emission light source into parallel light;
the second lens is used for converging the parallel light obtained by the first lens to obtain converged light; and the number of the first and second groups,
the diaphragm is used for enabling the converged light to form a point light source through a diaphragm aperture; wherein the content of the first and second substances,
the first lens, the second lens and the diaphragm are arranged in the shading cylinder.
Further, the temperature feedback assembly includes:
a temperature sensor for detecting a temperature of the emission light source;
the radiator is used for radiating the emission light source; and the number of the first and second groups,
the first feedback controller is used for receiving a temperature signal of the temperature sensor, judging whether the temperature signal is consistent with a preset temperature or not, and transmitting an instruction to the radiator to control the radiator to work; and when the temperature is higher than the preset temperature, controlling the radiator to work until the temperature is reduced to the set threshold value.
Further, the diaphragm receives an aperture adjustment instruction, responds to the aperture adjustment instruction, adjusts the aperture of the diaphragm from a first aperture to a second aperture, and forms a point light source by the converged light through the second aperture.
Further, the optical parameters include: light intensity and/or light spot.
Further, the second feedback controller compares the optical parameter of the second path of light beam with a preset optical parameter to obtain a comparison result; and adjusting the optical parameter of the first path of light beam transmitted to the target object based on the comparison result.
Further, the second feedback controller compares the light intensity of the second path of light beam with a preset light intensity to obtain a comparison result: when the light intensity is smaller than the preset light intensity, controlling the driving voltage or the driving current of the emission light source to increase so that the light intensity is increased to the preset light intensity; and when the light intensity is greater than the preset light intensity, controlling the driving voltage or the driving current of the emission light source to be reduced so as to reduce the light intensity to the preset light intensity.
Further, the second feedback controller determines the light spot of the second light beam: when the light spot parameter value is larger than a preset light spot, controlling the fourth lens to move from the current position to a first position so as to shorten the distance between the fourth lens and the point light source and further reduce the light spot of the first path of light beam transmitted to the target object; and when the light spot parameter value is smaller than a preset light spot, controlling the fourth lens to move from the current position to a second position so as to increase the distance between the fourth lens and the point light source, so that the light spot of the first path of light beam transmitted to the target object is enlarged.
Further, the second feedback controller determines the light intensity of the second light beam: when the light intensity parameter value is larger than the preset light intensity, controlling the third lens to move from the current position to a third position so as to increase the distance between the third lens and the point light source and further reduce the light intensity of the first path of light beam transmitted to the target object; and when the light intensity parameter value is smaller than the preset light intensity, controlling the third lens to move from the current position to a fourth position so as to shorten the distance between the third lens and the point light source and increase the light intensity of the first path of light beam transmitted to the target object.
Further, the light source control apparatus further includes a lens shift assembly for moving the third lens and the fourth lens, including:
a motor;
a first clutch;
the third lens is installed on the first driving shaft, and when the movement of the third lens is determined to be controlled, the first clutch is driven by the motor to drive the first driving shaft to move, so that the movement of the third lens is controlled;
a second clutch; and the number of the first and second groups,
and when the fourth lens is determined to be controlled to move, the motor drives the second clutch to drive the second driving shaft to move, so that the fourth lens is controlled to move.
The other technical scheme adopted by the invention is as follows: a light source control method based on temperature feedback adopts the light source control equipment, and the light source control method comprises the following steps:
the temperature feedback component in the light source control equipment based on temperature feedback is used for monitoring the temperature of the emission light source, and the first feedback controller of the temperature feedback component is used for controlling the radiator to radiate the heat of the emission light source, so that the situation that the light intensity of the emitted light is changed due to the temperature rise caused by long-term work is avoided;
collecting a second path of light beam reflected by the light splitting component by using an image receiving device in the light source control equipment based on temperature feedback to obtain an image;
extracting the characteristics of the image by using a second feedback controller in the light source control equipment based on temperature feedback, and determining the optical parameters of a second path of light beam; comparing the preset light intensity with the light intensity of the second path of light beam, controlling a light source driving component to adjust the driving voltage or the driving current of the emission light source based on the comparison result, and adjusting the optical parameters of the first path of light beam transmitted to the target object; or, comparing the preset optical parameters with the optical parameters of the second path of light beam, controlling the lens displacement assembly to move the third lens and the fourth lens based on the comparison result, and adjusting the optical parameters of the first path of light beam transmitted to the target object.
The invention has the beneficial effects that: the invention provides a light source control device and method based on temperature feedback, which can adjust the optical parameters of a light source irradiating a substance to be measured and also can solve the problem of heating of an emission light source. The invention firstly solves the defect of the traditional light source control equipment that the light parameters irradiated on the target object can not be quantified in real time. The invention enables the light transmitted to the target object to be completely consistent with the optical parameters fed back to the processor through the light splitting component, collects optical signals through the CCD lens and extracts the characteristics of the optical signals, thereby being capable of quantifying the optical parameters and further adjusting the required emergent light in real time. Secondly, the invention can monitor the temperature of the light source in real time, and effectively avoids the influence caused by overlong time of the light source and temperature rise. Meanwhile, the invention not only considers the real-time adjustment of the light intensity, but also considers the real-time adjustment of the light spot, and also considers the uniformity of the light source, and the light spot of the light source is adjusted to obtain the information of the measured object on different spatial positions when some non-uniform objects are measured by adjusting the size of the light spot, thereby improving the precision of the subsequent spectrum processing.
Drawings
FIG. 1 is a schematic diagram of a structure of a light source control device based on temperature feedback according to an embodiment of the present invention;
FIG. 2 is a diagram illustrating control of movement of a fourth lens according to an embodiment of the present invention;
FIG. 3 is a schematic diagram illustrating the control of the movement of a third lens according to an embodiment of the present invention;
FIG. 4a is a schematic diagram of a specific structure of a light source control device based on temperature feedback according to an embodiment of the present invention;
FIG. 4b is a schematic diagram of a light source module constructing a point light source of the light source control apparatus based on temperature feedback according to the embodiment of the present invention;
fig. 5 is a schematic flow chart illustrating an implementation of the light source control method according to the embodiment of the present invention.
The attached drawings are marked as follows: 11-temperature feedback assembly, 12-light source assembly, 13-shading cylinder, 14-third lens, 15-fourth lens, 16-light splitting assembly, 17-image receiving device, 18-lens displacement assembly, 19-second feedback controller, 20-light source driving assembly, 110-temperature sensor, 111-radiator, 112-first feedback controller, 120-first lens, 121-second lens, 122-diaphragm, 41-bromine tungsten lamp, 42-half mirror, 43-CCD lens, 44-lens, 45-PC, 460-motor, 461-first clutch, 462-first driving shaft, 463-second clutch, 464-second driving shaft.
Detailed Description
For further understanding of the contents, features and effects of the present invention, the following embodiments are described in detail with reference to the accompanying drawings:
FIG. 1 is a schematic diagram of a light source control device based on temperature feedback according to an embodiment of the present invention; as shown in fig. 1, includes:
the temperature feedback assembly 11, the light source assembly 12, the shading cylinder 13, the third lens 14, the fourth lens 15, the light splitting assembly 16, the image receiving device 17, the lens displacement assembly 18, the second feedback controller 19 and the light source driving assembly 20; the light source assembly 12 includes: a first lens 120, a second lens 121, and an aperture 122, wherein the first lens 120, the second lens 121, and the aperture 122 are disposed in the light shielding cylinder 13; the light source temperature feedback assembly 11 includes: a temperature sensor 110, a first feedback controller 112, a heat sink 111; wherein the content of the first and second substances,
the temperature feedback component 11 is used for monitoring the temperature of the emission light source and adjusting the temperature to avoid the influence of the temperature change of the emission light source on the light intensity of the emitted light;
the light source assembly 12 is used for converting an emission light source into a point light source;
the third lens 14 is used for converting the light emitted by the point light source into parallel light;
the fourth lens 15 is used for transmitting the parallel light to the light splitting component 16;
the light splitting component 16 is configured to split the parallel light into a first light beam and a second light beam, transmit the first light beam to a target object, and reflect the second light beam to the image receiving device 17;
the image receiving device 17 is configured to collect the second light beam to obtain an image;
the lens shift assembly 18 is configured to move the third lens 14 and the fourth lens 15.
The second feedback controller 19 is configured to extract feature data in the image; determining the optical parameters of the second light beam based on the extracted characteristic data; and adjusting the optical parameters of the first path of light beam transmitted to the target object based on the optical parameters of the second path of light beam.
The optical parameters include: light intensity and/or light spot.
The light source driving assembly 20 is configured to adjust a driving voltage or a driving current of the emission light source, and drive the emission light source to emit light.
Here, the emission light source may be a broad spectrum tungsten halogen lamp or a bromine tungsten lamp 41 or the like.
Here, the light-shielding cylinder 13 may be a black light-shielding cylinder 13.
Here, the target object may be any vessel or the like containing a complex solution.
In practical applications, in order to obtain a uniform light source, two lenses may be used to convert the light from the emission light source into parallel light, and the parallel light is converted into a point light source through the aperture 122. When the emitting light source is a broad spectrum tungsten halogen lamp, the stop 122 may also prevent imaging of the filament of the broad spectrum tungsten halogen lamp.
Based on this, in one embodiment,
the temperature sensor 110 is used for detecting the temperature of the emission light source;
the heat sink 111 is used for dissipating heat of the emission light source;
the first feedback controller 112 is configured to receive a temperature signal of the temperature sensor 110, determine whether the temperature signal is consistent with a preset temperature, and transmit an instruction to the heat sink 111 to control the operation of the heat sink; when the temperature is higher than the preset temperature, the radiator 111 is controlled to operate until the temperature is reduced to the set threshold value.
Based on this, in one embodiment,
the first lens 120 is used for converting the light emitted by the emission light source into parallel light;
the second lens 121 is configured to converge the parallel light to obtain converged light;
the diaphragm 122 is configured to form a point light source from the converged light through a diaphragm aperture.
In practical applications, the diaphragm 122 with adjustable diaphragm aperture can be used to convert the light of the emission light source into a point light source.
Based on this, in an embodiment, the diaphragm 122 is specifically configured to receive an aperture adjustment instruction; and responding to the aperture adjusting instruction, adjusting the aperture of the diaphragm from the first aperture to a second aperture, and forming a point light source by the converged light through the second aperture.
Here, the smaller the diaphragm aperture, the smaller the light intensity of the point light source formed.
In practical application, the optical parameters of the first path of light beam and the second path of light beam are the same, so that the optical parameters of the first path of light beam can be adjusted based on the second path of light beam.
Based on this, in an embodiment, the second feedback controller 19 is specifically configured to compare the optical parameter value of the second path of light beam with a preset optical parameter, so as to obtain a comparison result; and adjusting the optical parameter of the first path of light beam transmitted to the target object based on the comparison result.
In practical application, the second path of light beam can be used for extracting optical parameters therein and determining the light intensity and the light spot size of the second path of light beam; and adjusting the light intensity and the light spot size transmitted to the target object based on the light intensity and the light spot size of the second path of light beam.
Based on this, in an embodiment, the second feedback controller 19 is specifically configured to determine a light spot parameter of the second light beam based on a light parameter of image extraction; when the light spot parameter value is larger than a preset light spot, the fourth lens 15 is controlled to move from the current position to the first position, so that the distance between the fourth lens 15 and the point light source is shortened, and the light spot of the first light beam transmitted to the target object is reduced.
For example, fig. 2 is a schematic diagram of controlling the fourth lens 15 to move, and when the value of the spot parameter is larger than a preset spot, the fourth lens 15 is controlled to move from a current position, such as position 2, to position 1, so as to shorten the distance between the fourth lens 15 and the point light source, i.e., the stop 122, and thus the spot of the first light beam transmitted to the target object becomes smaller.
In an embodiment, the second feedback controller 19 is specifically configured to determine a light spot parameter of the second light beam based on an optical parameter of image extraction; and when the light spot parameter value is smaller than a preset light spot, controlling the fourth lens 15 to move from the current position to a second position so as to increase the distance between the fourth lens 15 and the point light source, so that the light spot of the first light beam transmitted to the target object is enlarged.
For example, as shown in fig. 2, when the spot parameter value is smaller than a preset spot, the fourth lens 15 is controlled to move from a current position, such as position 2, to position 3, so as to increase the distance between the fourth lens 15 and the point light source, i.e. the stop 122, so as to enlarge the spot of the first light beam transmitted to the target object.
It should be noted that, here, the size of the light spot transmitted to the target object is adjusted according to the size of the light spot of the second light beam, and if a substance with uneven absorption exists in the target object, the uniformity of the emergent light can be improved, thereby improving the precision of the spectral analysis. In addition, the size of the light spot transmitted to the target object is adjusted, so that the information content in the hyperspectral of the target object can be increased, and the precision of spectral analysis is improved. To the target object that absorption coefficient is very big, and can not adopt the strong light to shine, can will see through the facula grow of the emergent light of target object improves the light intensity of emergent light to avoid local light intensity too strong to lead to the emergence of the problem that interior composition among the target object received the harm.
In practical application, the image formed by the second path of light beam can be used for extracting the brightness characteristic data in the image, and the light intensity of the second path of light beam is determined based on the extracted brightness characteristic data; thereby adjusting the intensity of the light transmitted to the target object.
Based on this, in an embodiment, the second feedback controller 19 is specifically configured to determine the light intensity parameter of the second light beam based on the light parameter extracted from the image; when the light intensity parameter value is larger than the preset light intensity, the third lens 14 is controlled to move from the current position to the third position, so that the distance between the third lens 14 and the point light source is increased, and the light intensity of the first path of light beam transmitted to the target object is reduced.
For example, fig. 3 is a schematic diagram of controlling the third lens 14 to move, and when the light intensity parameter value is greater than the preset light intensity, the third lens 14 is controlled to move from the current position, such as position 2, to position 3, so as to increase the distance between the third lens 14 and the point light source, i.e., the diaphragm 122, and thus the light intensity of the first light beam transmitted to the target object becomes smaller.
In an embodiment, the second feedback controller 19 is specifically configured to determine a light intensity parameter of the second light beam based on a light parameter of the image extraction; when the light intensity parameter value is smaller than the preset light intensity, the third lens 14 is controlled to move from the current position to the fourth position, so that the distance between the third lens 14 and the point light source is shortened, and the light intensity of the first path of light beam transmitted to the target object is increased.
For example, as shown in fig. 3, when the value of the light intensity parameter is smaller than the preset light intensity, the third lens 14 is controlled to move from the current position, such as position 2, to position 1, so as to shorten the distance between the third lens 14 and the point light source, i.e., the diaphragm 122, and thus increase the light intensity of the first light beam transmitted to the target object.
It should be noted that, here, the light intensity transmitted to the target object is adjusted according to the light intensity of the second path of light beam, so that the emergent light penetrating through the substance to be detected is not weak or strong, and further the problem that the spectrometer cannot collect the emergent light or the spectrometer collecting the emergent light reaches saturation can be avoided.
In practical application, the electromagnetic clutch and the stepping motor can be used to control the first driving shaft 462 as the lead screw to which the third lens 14 is fixed and the second driving shaft 464 as the lead screw to which the fourth lens 15 is fixed, so as to adjust the light intensity and the light spot of the light irradiated on the target object.
Based on this, in an embodiment, the light source control apparatus based on temperature feedback further includes: the lens displacement assembly 18 is used for driving the first clutch 461 through the motor 460 to drive the first driving shaft 462 provided with the third lens 14 to move so as to control the third lens 14 to move when the third lens 14 is determined to be controlled to move; when the fourth lens 15 is determined to be controlled to move, the motor 460 drives the second clutch 463 to drive the second driving shaft 464 mounted with the fourth lens 15 to move, and the fourth lens 15 is controlled to move.
In addition, in an embodiment, the second feedback controller 19 is specifically configured to compare the light intensity of the second path of light beam with a preset light intensity, so as to obtain a comparison result; and when the light intensity is smaller than the preset light intensity, controlling the current/voltage drive of the emission light source to increase so that the light intensity is increased to the preset light intensity.
For example, as shown in fig. 4a, when the light intensity is less than the predetermined light intensity, the light source driving assembly 20 is controlled to increase the current/voltage of the emitting light source, so that the light intensity is increased to the predetermined light intensity.
In an embodiment, the second feedback controller 19 is specifically configured to compare the light intensity of the second path of light beam with a preset light intensity to obtain a comparison result; and when the light intensity is greater than the preset light intensity, controlling the current/voltage drive of the emission light source to be reduced so as to reduce the light intensity to the preset light intensity.
For example, as shown in fig. 4a, when the light intensity is greater than the predetermined light intensity, the light source driving component 20 is controlled to reduce the current/voltage of the emitting light source, so that the light intensity is reduced to the predetermined light intensity.
By adopting the technical scheme of the embodiment of the invention, the light intensity and/or the light spot size transmitted to the target object can be automatically adjusted according to the optical parameters of the second path of light beam.
The following is a schematic diagram of the structure of the light source control device based on temperature feedback, which is described in detail with reference to specific embodiments.
Fig. 4a is a schematic diagram of a specific structure of a light source control device based on temperature feedback, as shown in fig. 4a, including: a bromine tungsten lamp 41 (i.e., a light emitting source), a temperature feedback assembly 11 (including a temperature sensor 110, a heat sink 111, and a first feedback controller 112), a first lens 120, a second lens 121, a diaphragm 122, a light shielding cylinder 13, a third lens 14, a fourth lens 15, a half mirror 42 (i.e., a light splitting assembly 16), a CCD lens 43 (i.e., an image receiving device 17), a lens 44, a lens displacement assembly 18 (including a motor 460, a first clutch 461, a first driving shaft 462, a second clutch 463, and a second driving shaft 464), a second feedback controller 19, a light source driving assembly 20; the first lens 120, the second lens 121 and the diaphragm 122 are arranged in the light shielding cylinder 13; the third lens 14 is mounted on the first drive shaft 462, and the fourth lens 15 is mounted on the second drive shaft 464; the motor 460 is connected with the second feedback controller 19, and the second feedback controller 19 is connected with the PC 45; wherein the content of the first and second substances,
the temperature feedback component 11 is used for monitoring the temperature of the emitting light source, and the first feedback controller 112 is used for controlling the heat sink 111 to dissipate heat of the emitting light source, so as to avoid the situation that the temperature rises due to long-term operation, thereby causing the light intensity of the emitted light to change.
The first lens 120 is used for converting the light emitted by the bromine tungsten lamp 41 into parallel light;
the second lens 121 is configured to converge the parallel light to obtain converged light;
the diaphragm 122 is configured to form a point light source from the converged light through a diaphragm aperture.
The third lens 14 is used for converting the light emitted by the point light source into parallel light;
the fourth lens 15 is used for transmitting the parallel light to the half mirror 42;
the half-transmitting and half-reflecting mirror 42 is configured to divide the parallel light into a first path of light beam and a second path of light beam, transmit the first path of light beam to a target object, and reflect the second path of light beam to the CCD lens 43;
the CCD lens 43 is configured to collect the second path of light beam to obtain an image;
the second feedback controller 19 is configured to extract an optical parameter of the image, and determine an optical parameter of the second light beam; adjusting the optical parameters of the first path of light beam transmitted to the target object based on the optical parameters of the second path of light beam; the optical parameters include: light spot and/or intensity;
the lens 44 is configured to adjust the light of the first light beam irradiated onto the target object into different forms of light, such as gaussian light, cone light, and the like.
Based on the light source control device based on temperature feedback provided by the embodiment of the present invention, the embodiment of the present invention further provides a light source control method based on temperature feedback, fig. 5 is a schematic view of an implementation flow of the light source control method according to the embodiment of the present invention, and as shown in fig. 5, the method includes:
step 501: monitoring the temperature of the emission light source by using a temperature feedback component 11 in the light source control equipment based on temperature feedback to prevent the light intensity of the emitted light from changing due to heating; acquiring a second path of light beam reflected by the light splitting component 16 in the light source control equipment based on temperature feedback by using an image receiving device 17 in the light source control equipment based on temperature feedback to obtain an image;
step 502: extracting optical parameters in the image by using a second feedback controller 19 in the light source control equipment based on temperature feedback, and determining the optical parameters of the second path of light beam; adjusting the optical parameters of the first path of light beam transmitted to the target object based on the optical parameters of the second path of light beam; the optical parameters include: spot and/or intensity.
Here, the light source control apparatus based on temperature feedback includes: the temperature feedback assembly 11, the light source assembly 12, the shading cylinder 13, the third lens 14, the fourth lens 15, the light splitting assembly 16, the image receiving device 17, the lens displacement assembly 18, the second feedback controller 19 and the light source driving assembly 20; the light source assembly 12 includes: a first lens 120, a second lens 121, and an aperture 122, wherein the first lens 120, the second lens 121, and the aperture 122 are disposed in the light shielding cylinder 13; wherein the content of the first and second substances,
the temperature feedback component 11 is used for monitoring the temperature of the light source and avoiding the change of the light intensity of the emitted light caused by the temperature change;
the light source assembly 12 is used for converting an emission light source into a point light source;
the third lens 14 is used for converting the light emitted by the point light source into parallel light;
the fourth lens 15 is used for transmitting the parallel light to the light splitting component 16;
the light splitting component 16 is configured to split the parallel light into a first light beam and a second light beam, transmit the first light beam to a target object, and reflect the second light beam to the image receiving device 17.
In an embodiment, the adjusting, based on the optical parameter of the second light beam, the optical parameter of the first light beam transmitted to the target object includes: comparing the optical parameter value of the second path of light beam with a preset optical parameter to obtain a comparison result; and adjusting the optical parameter of the first path of light beam transmitted to the target object based on the comparison result.
Specifically, the light spot parameter of the second light beam is determined based on the extracted light spot parameter; when the light spot parameter value is larger than a preset light spot, the fourth lens 15 is controlled to move from the current position to the first position, so that the distance between the fourth lens 15 and the point light source is shortened, and the light spot of the first light beam transmitted to the target object is reduced. Determining the light spot parameters of the second path of light beam based on the extracted light spot parameters; and when the light spot parameter value is smaller than a preset light spot, controlling the fourth lens 15 to move from the current position to a second position so as to increase the distance between the fourth lens 15 and the point light source, so that the light spot of the first light beam transmitted to the target object is enlarged.
It should be noted that, here, the size of the light spot transmitted to the target object is adjusted according to the size of the light spot of the second light beam, and if a substance with uneven absorption exists in the target object, the uniformity of the emergent light can be improved, thereby improving the precision of the spectral analysis. In addition, the size of the light spot transmitted to the target object is adjusted according to the size of the light spot of the second path of light beam, so that the information content in the hyperspectral of the target object can be increased, and the precision of spectral analysis is improved. To the target object that absorption coefficient is very big, and can not adopt the strong light to shine, can will see through the facula grow of the emergent light of target object improves the light intensity of emergent light to avoid local light intensity too strong to lead to the emergence of the problem that interior composition among the target object received the harm.
In practical application, the image formed by the second path of light beam can be used for extracting brightness characteristic data in the image and determining the light intensity of the second path of light beam; and adjusting the light intensity transmitted to the target object based on the light intensity of the second path of light beam.
Specifically, based on the extracted characteristic data, determining a light intensity parameter of the second path of light beam; when the light intensity parameter value is larger than the preset light intensity, the third lens 14 is controlled to move from the current position to the third position, so that the distance between the third lens 14 and the point light source is increased, and the light intensity of the first path of light beam transmitted to the target object is reduced. Determining the light intensity parameter of the second path of light beam based on the extracted light intensity parameter; when the light intensity parameter value is smaller than the preset light intensity, the third lens 14 is controlled to move from the current position to the fourth position, so that the distance between the third lens 14 and the point light source is shortened, and the light intensity of the first path of light beam transmitted to the target object is increased.
It should be noted that, here, the light intensity transmitted to the target object is adjusted according to the light intensity of the second path of light beam, so that the emergent light penetrating through the substance to be detected is not weak or strong, and further the problem that the spectrometer cannot collect the emergent light or the spectrometer collecting the emergent light reaches saturation can be avoided.
In practical application, the electromagnetic clutch and the stepping motor can be used to control the lead screw, i.e. the first driving shaft 462 fixed with the third lens 14 and the lead screw, i.e. the second driving shaft 464 fixed with the fourth lens 15, so as to adjust the light intensity and the light intensity of the light irradiated on the target object;
specifically, when it is determined that the third lens 14 is controlled to move, the motor 460 drives the first clutch 461 to drive the first driving shaft 462 mounted with the third lens 14 to move, so as to control the third lens 14 to move; when the fourth lens 15 is determined to be controlled to move, the motor 460 drives the second clutch 463 to drive the second driving shaft 464 mounted with the fourth lens 15 to move, and the fourth lens 15 is controlled to move.
In addition, in an embodiment, the second feedback controller 19 is specifically configured to compare the light intensity of the second path of light beam with a preset light intensity, so as to obtain a comparison result; and when the light intensity is smaller than the preset light intensity, controlling the current/voltage drive of the emission light source to increase so that the light intensity is increased to the preset light intensity.
For example, as shown in fig. 4a, when the light intensity is less than the predetermined light intensity, the light source driving assembly 20 is controlled to increase the current/voltage of the emitting light source, so that the light intensity is increased to the predetermined light intensity.
In an embodiment, the second feedback controller 19 is specifically configured to compare the light intensity of the second path of light beam with a preset light intensity to obtain a comparison result; and when the light intensity is greater than the preset light intensity, controlling the current/voltage drive of the emission light source to be reduced so as to reduce the light intensity to the preset light intensity.
For example, as shown in fig. 4a, when the light intensity is greater than the predetermined light intensity, the light source driving component 20 is controlled to reduce the current/voltage of the emitting light source, so that the light intensity is reduced to the predetermined light intensity.
It should be noted that: "first," "second," and the like are used for distinguishing between similar elements and not necessarily for describing a particular sequential or chronological order.
The methods disclosed in the several method embodiments provided in the present application may be combined arbitrarily without conflict to obtain new method embodiments.
Features disclosed in several of the product embodiments provided in the present application may be combined in any combination to yield new product embodiments without conflict.
The features disclosed in the several method or apparatus embodiments provided in the present application may be combined arbitrarily, without conflict, to arrive at new method embodiments or apparatus embodiments.
The above description is only for the specific embodiments of the present invention, but the scope of the present invention is not limited thereto, and any person skilled in the art can easily conceive of the changes or substitutions within the technical scope of the present invention, and all the changes or substitutions should be covered within the scope of the present invention. Therefore, the protection scope of the present invention shall be subject to the protection scope of the appended claims.
The above description is only a preferred embodiment of the present invention, and is not intended to limit the scope of the present invention.
Claims (7)
1. The light source control equipment based on temperature feedback is characterized by comprising a temperature feedback assembly (11), a light source assembly (12), a shading cylinder (13), a third lens (14), a fourth lens (15), a light splitting assembly (16), an image receiving device (17), a second feedback controller (19) and a light source driving assembly (20); wherein the content of the first and second substances,
the light source assembly (12) for converting an emission light source into a point light source; the light source component (12) is arranged in the shading cylinder (13);
the light source driving component (20) is used for driving the emission light source to enable the emission light source to emit light spectrum;
the temperature feedback assembly (11) is used for monitoring the temperature of the emission light source and avoiding the light intensity change of the emitted light caused by overhigh temperature of the emission light source;
the third lens (14) is used for converting the light emitted by the point light source into parallel light;
the fourth lens (15) is used for transmitting the parallel light obtained by the third lens (14) to the light splitting component (16);
the light splitting component (16) is used for splitting the parallel light passing through the fourth lens (15) into a first light beam and a second light beam, transmitting the first light beam to a target object, and reflecting the second light beam to the image receiving device (17);
the image receiving device (17) is used for collecting the second path of light beam to obtain an image;
the second feedback controller (19) is used for extracting characteristic data in the image; determining optical parameters of the second light beam based on the extracted characteristic data, wherein the optical parameters comprise: light intensity and/or light spot; the second feedback controller (19) compares the optical parameter of the second path of light beam with a preset optical parameter to obtain a comparison result, and adjusts the optical parameter of the first path of light beam transmitted to the target object based on the comparison result;
wherein the content of the first and second substances,
the second feedback controller (19) determines the light spot of the second light beam: when the light spot parameter value is larger than a preset light spot, controlling the fourth lens (15) to move from the current position to the first position so as to shorten the distance between the fourth lens (15) and the point light source and further reduce the light spot of the first light beam transmitted to the target object; when the light spot parameter value is smaller than a preset light spot, controlling the fourth lens (15) to move from the current position to a second position so as to increase the distance between the fourth lens (15) and the point light source and further enlarge the light spot of the first light beam transmitted to the target object;
the second feedback controller (19) determines the light intensity of the second light beam: when the light intensity parameter value is larger than the preset light intensity, controlling the third lens (14) to move from the current position to a third position so as to increase the distance between the third lens (14) and the point light source and reduce the light intensity of the first path of light beam transmitted to the target object; and when the light intensity parameter value is smaller than the preset light intensity, controlling the third lens (14) to move from the current position to a fourth position so as to shorten the distance between the third lens (14) and the point light source and increase the light intensity of the first path of light beam transmitted to the target object.
2. A light source control apparatus based on temperature feedback according to claim 1, characterized in that the light source assembly (12) comprises:
a first lens (120) for converting light emitted from the emission light source into parallel light;
the second lens (121) is used for converging the parallel light obtained by the first lens (120) to obtain converged light; and the number of the first and second groups,
the diaphragm (122) is used for enabling the converged light to form a point light source through a diaphragm aperture; wherein the content of the first and second substances,
the first lens (120), the second lens (121), and the diaphragm (122) are disposed within the light-shielding cylinder (13).
3. A light source control device based on temperature feedback according to claim 1, characterized in that the temperature feedback assembly (11) comprises:
a temperature sensor (110) for detecting a temperature of the emission light source;
a heat sink (111) for dissipating heat from the emission light source; and the number of the first and second groups,
the first feedback controller (112) is used for receiving a temperature signal of the temperature sensor (110), judging whether the temperature is consistent with a preset temperature or not, and transmitting an instruction to the radiator (111) to control the radiator (111) to work; when the temperature is higher than the preset temperature, the radiator (111) is controlled to work until the temperature is reduced to the set threshold value.
4. The light source control device based on temperature feedback according to claim 2, wherein the diaphragm (122) receives an aperture adjustment command, adjusts the diaphragm aperture from a first aperture to a second aperture in response to the aperture adjustment command, and forms the converged light into a point light source through the second aperture.
5. The light source control device based on temperature feedback as claimed in claim 1, wherein the second feedback controller (19) compares the light intensity of the second light beam with a preset light intensity to obtain a comparison result: when the light intensity is smaller than the preset light intensity, controlling the driving voltage or the driving current of the emission light source to increase so that the light intensity is increased to the preset light intensity; and when the light intensity is greater than the preset light intensity, controlling the driving voltage or the driving current of the emission light source to be reduced so as to reduce the light intensity to the preset light intensity.
6. A light source control device based on temperature feedback according to any of claims 1 to 5, characterized in that the light source control device further comprises a lens displacement assembly (18), said lens displacement assembly (18) being adapted to move said third lens (14) and said fourth lens (15), comprising:
a motor (460);
a first clutch (461);
a first driving shaft (462), wherein the third lens (14) is mounted on the first driving shaft (462), and when the third lens (14) is determined to be controlled to move, the first clutch (461) is driven by the motor (460) to drive the first driving shaft (462) to move, so that the third lens (14) is controlled to move;
a second clutch (463); and the number of the first and second groups,
and the fourth lens (15) is installed on the second driving shaft (464), and when the fourth lens (15) is determined to be controlled to move, the motor (460) drives the second clutch (463) to drive the second driving shaft (464) to move, so that the fourth lens (15) is controlled to move.
7. A light source control method based on temperature feedback, wherein the light source control apparatus of any one of the above claims 1 to 6 is adopted, and the light source control method comprises the following steps:
the temperature of the emission light source is monitored by using a temperature feedback component (11) in the light source control equipment based on temperature feedback, and a first feedback controller (112) of the temperature feedback component (11) is used for controlling a radiator (111) to radiate the emission light source, so that the situation that the temperature rises due to long-term work, and the light intensity of the emitted light is changed is avoided;
collecting a second path of light beam reflected by the light splitting component (16) by using an image receiving device (17) in the light source control equipment based on temperature feedback to obtain an image;
extracting the characteristics of the image by using a second feedback controller (19) in the light source control equipment based on the temperature feedback, and determining the optical parameters of a second light beam; comparing the preset light intensity with the light intensity of the second path of light beam, controlling a light source driving component (20) to adjust the driving voltage or the driving current of the emission light source based on the comparison result, and adjusting the optical parameters of the first path of light beam transmitted to the target object; or comparing preset optical parameters with optical parameters of the second path of light beam, controlling a lens displacement component (18) to move the third lens (14) and the fourth lens (15) based on the comparison result, and adjusting the optical parameters of the first path of light beam transmitted to the target object.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201911418069.5A CN111060461B (en) | 2019-12-31 | 2019-12-31 | Light source control equipment and method based on temperature feedback |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201911418069.5A CN111060461B (en) | 2019-12-31 | 2019-12-31 | Light source control equipment and method based on temperature feedback |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN111060461A CN111060461A (en) | 2020-04-24 |
| CN111060461B true CN111060461B (en) | 2021-10-01 |
Family
ID=70305903
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201911418069.5A Active CN111060461B (en) | 2019-12-31 | 2019-12-31 | Light source control equipment and method based on temperature feedback |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN111060461B (en) |
Families Citing this family (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN114299826B (en) * | 2022-01-19 | 2023-12-26 | 深圳市奥视微科技有限公司 | Display module, display equipment and optical path adjusting method of display module |
Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN205593649U (en) * | 2016-04-15 | 2016-09-21 | 辽宁省交通高等专科学校 | A collimated light source for high -accuracy machine vision measurement system |
| CN105988269A (en) * | 2015-02-06 | 2016-10-05 | 深圳市绎立锐光科技开发有限公司 | Projection system, light source system, and light source control device and control method |
| CN107823802A (en) * | 2017-11-08 | 2018-03-23 | 中国科学院苏州生物医学工程技术研究所 | The multi-functional photon treatment system of complex light and its control method |
| CN108957929A (en) * | 2018-08-15 | 2018-12-07 | 青岛海信激光显示股份有限公司 | A kind of laser light source and laser-projector |
| US10228324B2 (en) * | 2016-07-25 | 2019-03-12 | Mks Instruments, Inc. | Gas measurement system |
-
2019
- 2019-12-31 CN CN201911418069.5A patent/CN111060461B/en active Active
Patent Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105988269A (en) * | 2015-02-06 | 2016-10-05 | 深圳市绎立锐光科技开发有限公司 | Projection system, light source system, and light source control device and control method |
| CN205593649U (en) * | 2016-04-15 | 2016-09-21 | 辽宁省交通高等专科学校 | A collimated light source for high -accuracy machine vision measurement system |
| US10228324B2 (en) * | 2016-07-25 | 2019-03-12 | Mks Instruments, Inc. | Gas measurement system |
| CN107823802A (en) * | 2017-11-08 | 2018-03-23 | 中国科学院苏州生物医学工程技术研究所 | The multi-functional photon treatment system of complex light and its control method |
| CN108957929A (en) * | 2018-08-15 | 2018-12-07 | 青岛海信激光显示股份有限公司 | A kind of laser light source and laser-projector |
Also Published As
| Publication number | Publication date |
|---|---|
| CN111060461A (en) | 2020-04-24 |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| EP3516415A1 (en) | Adaptive transmission power control for a lidar | |
| US20070081233A1 (en) | Scanning laser microscope apparatus and light-amount detection unit | |
| CN108204979B (en) | Method and device for calibrating light source in test paper detection equipment | |
| EP3530179A1 (en) | Obtaining images for use in determining one or more properties of skin of a subject | |
| CA2598730A1 (en) | Optimizing maldi mass spectrometer operation by sample plate image analysis | |
| CN111060461B (en) | Light source control equipment and method based on temperature feedback | |
| TWI695164B (en) | Broadband wafer defect detection system and broadband wafer defect detection method | |
| WO2011147385A2 (en) | Method and device for continuous detection of the thickness and/or homogeneity of linear objects, particularly textile fibres, and their application | |
| CN107345908B (en) | Scattering system for acquiring multi-surface diffuse reflection information of fruits | |
| EP2803983A1 (en) | Infrared non-destructive inspection method and apparatus | |
| US20150268180A1 (en) | X-ray analyzer | |
| KR20160075374A (en) | Method and device for local stabilization of a radiation spot on a remote target object | |
| EP3722780B1 (en) | Particle size measuring apparatus and measuring method | |
| CN111024242A (en) | Thermal infrared imager and continuous automatic focusing method thereof | |
| CN201622061U (en) | System for measuring surface size of product | |
| CN104111330A (en) | Up-conversion luminescence immunochromatography analyzer and detection method thereof | |
| US11782161B2 (en) | ToF module and object recognition device using ToF module | |
| CN111060462B (en) | Light source control equipment and method | |
| CN114207420A (en) | Device for controlling the quality of an operation in an industrial production line, corresponding method and computer program product | |
| CN106353282B (en) | Micro-area reflectivity test system and test method thereof | |
| KR102428402B1 (en) | Inspecting system for micro led | |
| KR101517554B1 (en) | Control method for color lighting of vision system by conjugate gradient algorithm | |
| JP2006259326A (en) | Infrared microscope | |
| KR101497920B1 (en) | Control method for color lighting of vision system by steepest descent algorithm | |
| CN105424649B (en) | A kind of air chamber structure, gas detection case and gas detecting system |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| PB01 | Publication | ||
| PB01 | Publication | ||
| SE01 | Entry into force of request for substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| GR01 | Patent grant | ||
| GR01 | Patent grant |