CN212623339U - Laser emitting device with adjustable laser line - Google Patents
Laser emitting device with adjustable laser line Download PDFInfo
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- CN212623339U CN212623339U CN202020919211.6U CN202020919211U CN212623339U CN 212623339 U CN212623339 U CN 212623339U CN 202020919211 U CN202020919211 U CN 202020919211U CN 212623339 U CN212623339 U CN 212623339U
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Abstract
The utility model discloses a laser ray adjustable laser emission device, include: the laser beam emitter, the deformable liquid lens, the cylindrical lens, the electric control variable-focus lens and the spectroscope are coaxial in the vertical direction, the image sensor and the spectroscope are coaxial in the horizontal direction, and the deformable liquid lens, the electric control variable-focus lens and the image sensor are all connected with the industrial personal computer through signal lines. The utility model discloses can regulate and control the width of laser line, light intensity, solve traditional three-dimensional laser scanning technique, along with the increase of scanning distance, the too big problem of laser line width has widened the range of application of three-dimensional laser scanning technique.
Description
Technical Field
The utility model relates to a laser scanning and adaptive optics field especially relate to a laser line adjustable laser emission device.
Background
The adaptive optics technology is used for compensating wave front distortion in the optical transmission process, and the core device of the adaptive optics technology is a deformable mirror which is used for generating a wave surface corresponding to the wave front distortion. In the adaptive optical system, a wavefront sensor is usually used for acquiring wavefront characteristics, and a control signal of a deformable mirror is calculated through a closed-loop control algorithm, so that real-time distortion compensation is realized.
Because the cost of the wavefront sensor is high, the image sensor can be used for replacing the wavefront sensor for certain specific application occasions, and iterative optimization calculation is carried out by taking image characteristics such as definition and the like as an objective function. In recent years, adaptive optical systems without wavefront sensors are widely applied to the field of biological microscopy and the like, and related algorithms have been developed and matured.
The three-dimensional laser scanning technology uses laser lines to scan the surface of an object, and a reconstruction algorithm is used to obtain a model of the surface of the object. In a common laser scanning technology, because the focusing position of a laser line is fixed, the laser line widths at different scanning distances are inconsistent, and particularly when the distance is long, the laser line width is too large, so that an algorithm is difficult to operate.
SUMMERY OF THE UTILITY MODEL
The embodiment of the utility model provides a laser beam adjustable laser emission device to solve the nonadjustable problem of current laser line width.
In order to achieve the above object, the embodiment of the present invention adopts the following technical solutions:
an embodiment of the utility model provides a laser beam adjustable laser emission device, include: the laser beam emitter, the deformable liquid lens, the cylindrical lens, the electric control variable-focus lens, the spectroscope, the image sensor and the industrial personal computer are coaxial in the vertical direction, the image sensor and the spectroscope are coaxial in the horizontal direction, and the deformable liquid lens, the electric control variable-focus lens and the image sensor are all connected with the industrial personal computer through signal lines.
Further, the laser beam emitter comprises a laser and a laser collimator, wherein laser emitted by the laser beam emitter is parallel light, and the diameter of the laser beam is smaller than the clear aperture of the deformable liquid lens.
Furthermore, the deformable liquid lens comprises two circular lenses and a plurality of actuators surrounding along the circumference of the circular lenses, and transparent mineral oil is filled between the two lenses.
Further, the actuator generates deformation by squeezing the two lenses, and changes the optical paths of the light beams passing through the deformable liquid lens at different positions in the direction perpendicular to the light beams, so that the wave front characteristics of the light beams are controlled.
Furthermore, the actuator is connected with the industrial personal computer through a driver, and the driver converts a control signal of the industrial personal computer into a voltage applied to the actuator.
Further, the cylindrical lens has a focal length F1For converting an incident laser beam of diameter D into an output laser line focused in the y-direction, extended in the x-direction and propagated in the z-direction, the maximum width w of said output laser linemaxCalculated by the following formula:
furthermore, the focal length of the electric control variable-focus lens is a variable F2The focal length F of the lens system is calculated by the following formula:
and d is the distance between the electrically-controlled variable-focus lens and the cylindrical lens, and when the surface of the target object is positioned at the imaging surface of the electrically-controlled variable-focus lens F, the width of the laser line is the minimum.
The laser device comprises a laser beam emitter, a deformable liquid lens, a cylindrical lens, an electric control variable-focus lens, a spectroscope, an image sensor and an industrial personal computer, and is characterized by further comprising a sealed cabin, wherein the laser beam emitter, the deformable liquid lens, the cylindrical lens, the electric control variable-focus lens, the spectroscope, the image sensor and the industrial personal computer are all arranged in the sealed cabin, an optical glass window and a watertight connector are arranged on the sealed cabin, laser passes through the optical glass window to be emitted, and power lines of the laser beam.
According to the technical scheme, the embodiment of the utility model provides a laser line adjustable laser emission device can be used for three-dimensional laser scanning field, solves the limited problem of scanning distance that arouses by the laser line is unadjustable, can adjust the width and the light intensity distribution of laser line in the use adaptively, widens three-dimensional laser technology's range of application. The embodiment of the utility model provides an in, deformable liquid lens are a wavefront compensation arrangement, can control the facula distribution of laser, and electronic zoom lens is through changing the focus of voltage control lens, and the focus position of laser line can be adjusted to cooperation cylindrical lens to change the width of laser line on the imaging surface. Meanwhile, the laser emitting device combines the adaptive optics technology, and also provides an application scheme of the three-dimensional laser scanning technology in special environments such as underwater, high temperature and the like.
Drawings
The accompanying drawings, which form a part of the specification, are included to provide a further understanding of the invention, and are incorporated in and constitute a part of this specification, illustrate embodiments of the invention and together with the description serve to explain the invention without unduly limiting the scope of the invention. In the drawings:
fig. 1 is a schematic structural diagram of a laser emitting device with adjustable laser lines according to an embodiment of the present invention;
in the figure, a laser beam emitter 1, a deformable liquid lens 2, a cylindrical lens 3, an electric zoom lens 4, a spectroscope 5, an optical glass window 6, an image sensor 7, an industrial personal computer 8, a sealed cabin 9, a watertight connector 10, a power line 11 and an object 12.
Detailed Description
It should be noted that the embodiments and features of the embodiments in the present application may be combined with each other without conflict. The present invention will be described in detail below with reference to the accompanying drawings in conjunction with embodiments.
It is noted that the terminology used herein is for the purpose of describing particular embodiments only and is not intended to be limiting of example embodiments according to the present application. As used herein, the singular forms "a", "an" and "the" are intended to include the plural forms as well, and it should be understood that when the terms "comprises" and/or "comprising" are used in this specification, they specify the presence of stated features, steps, operations, devices, components, and/or combinations thereof, unless the context clearly indicates otherwise.
It should be noted that the terms "first," "second," and the like in the description and claims of this application and in the drawings are used for distinguishing between similar elements and not necessarily for describing a particular sequential or chronological order. It is to be understood that the terms so used are interchangeable under appropriate circumstances such that the embodiments of the application described herein are, for example, capable of operation in sequences other than those illustrated or otherwise described herein. Furthermore, the terms "comprises," "comprising," and "having," and any variations thereof, are intended to cover a non-exclusive inclusion, such that a process, method, system, article, or apparatus that comprises a list of steps or elements is not necessarily limited to those steps or elements expressly listed, but may include other steps or elements not expressly listed or inherent to such process, method, article, or apparatus.
Spatially relative terms, such as "above … …," "above … …," "above … …," "above," and the like, may be used herein for ease of description to describe one device or feature's spatial relationship to another device or feature as illustrated in the figures. It will be understood that the spatially relative terms are intended to encompass different orientations of the device in use or operation in addition to the orientation depicted in the figures. For example, if a device in the figures is turned over, devices described as "above" or "on" other devices or configurations would then be oriented "below" or "under" the other devices or configurations. Thus, the exemplary term "above … …" can include both an orientation of "above … …" and "below … …". The device may be otherwise variously oriented (rotated 90 degrees or at other orientations) and the spatially relative descriptors used herein interpreted accordingly.
Exemplary embodiments according to the present application will now be described in more detail with reference to the accompanying drawings. These exemplary embodiments may, however, be embodied in many different forms and should not be construed as limited to only the embodiments set forth herein. It is to be understood that these embodiments are provided so that this disclosure will be thorough and complete, and will fully convey the concept of the exemplary embodiments to those skilled in the art, in the drawings, it is possible to enlarge the thicknesses of layers and regions for clarity, and the same devices are denoted by the same reference numerals, and thus the description thereof will be omitted.
Combine figure 1 to show, according to the utility model discloses an embodiment, to in the laser scanning field, the application field that laser line width degree is unadjustable to cause is limited, provides a laser emission device of laser line adjustable, utilizes self-adaptation optical system, reaches the purpose that remains outgoing laser line thinnest throughout to the range of application of three-dimensional laser scanning technique has been widened. The device includes: the device comprises a laser beam emitter 1, a deformable liquid lens 2, a cylindrical lens 3, an electric zoom lens 4, a spectroscope 5, an image sensor 7 and an industrial personal computer 8. The laser beam emitter, the deformable liquid lens, the cylindrical lens, the electric control variable-focus lens and the spectroscope are coaxial in the vertical direction, the image sensor and the spectroscope are coaxial in the horizontal direction, and the deformable liquid lens, the electric control variable-focus lens and the image sensor are all connected with the industrial personal computer through signal lines.
When the laser imaging device is used, the laser beam emitter 1 generates laser, the laser sequentially passes through the deformable liquid lens 2, the cylindrical lens 3 and the electric control variable-focus lens 4 and then reaches the spectroscope 5, after the laser is split by the spectroscope 5, one laser beam passes through optical glass to be imaged on the surface of a target object 12, the other laser beam reaches the image sensor 7, reflected light of the spectroscope 5 enters the image sensor 7, transmitted light of the spectroscope 5 irradiates the target object, the image sensor 7 is used for shooting the imaging condition of a laser line on the surface of the target object and sending image data to the industrial personal computer 8, and the industrial personal computer 8 outputs control signals for controlling the deformable liquid lens and the electric variable-focus lens.
In this embodiment, the laser beam emitter 1 is used for generating a parallel laser beam, and generally includes a laser for generating laser light and a laser collimator for improving laser quality and generating a parallel laser beam. The diameter of the laser beam is slightly larger than the clear aperture of the deformable liquid lens so as to filter the part with poor quality of the laser beam edge.
In this embodiment, the deformable liquid lens 2 is connected to an industrial personal computer 8, is controlled by the industrial personal computer 8, and is used for generating a wavefront compensation amount specified by the industrial personal computer, and the element is generally used for adjusting the light intensity distribution of a laser line. For special environments such as underwater, high temperature and the like, wavefront distortion generated by environmental influence in the laser beam propagation process can be corrected by the deformable liquid lens 2. The deformable liquid lens 2 comprises two circular lenses and a plurality of actuators surrounding the circumferences of the circular lenses, and after voltage is applied to the actuators, the actuators deform to extrude the circular lenses to deform. Transparent mineral oil is filled between the two round lenses. The actuator generates deformation by extruding the two lenses, and changes the optical paths of the light beams passing through the deformable liquid lens at different positions in the direction vertical to the light beams, so that the wave front characteristics of the light beams are controlled. The actuator is connected with the industrial personal computer through a driver, and the driver converts a control signal of the industrial personal computer into a voltage applied to the actuator. The present embodiment is intended to employ, but not limited to, AOL1810 model deformable liquid lens products from Dynamic Optics, italy.
In the present embodiment, the cylindrical lens 3 is used to convert the laser beam into a line laser. The electric zoom lens 4 is matched with the cylindrical lens 3 and used for adjusting the width of the laser line. The electric zoom lens 4 is also controlled by the industrial personal computer 8, the industrial personal computer 8 applies specified voltage to control the electric zoom lens to generate corresponding focal length, thereby controlling laserThe width of the line varies. The focal length range of the combined lens formed by the motorized zoom lens 4 and the cylindrical lens 3 determines the working distance of the laser. The cylindrical lens 3 has a focal length F1For converting an incident laser beam of diameter D into an output laser line focused in the y-direction, extended in the x-direction and propagated in the z-direction, the maximum width w of said output laser linemaxCalculated by the following formula:
the focal length of the electric control variable focus lens is a variable F2The focal length F of the lens system is calculated by the following formula:
and d is the distance between the electrically-controlled variable-focus lens and the cylindrical lens, and when the surface of the target object is positioned at the imaging surface of the electrically-controlled variable-focus lens F, the width of the laser line is the minimum.
The present embodiment is intended to employ, but not limited to, a plano-convex cylindrical lens product of model LJ1942L2 of Thorlabs corporation, usa and an electric zoom lens product of model EL-10-30-TC of Optotune corporation, switzerland.
In this embodiment, the laser beam passes through the spectroscope 5, one beam of the laser beam passes through the optical glass window to form an image on the surface of the target object 12, the other beam of the laser beam reaches the image sensor 7, and the sensor sends the image to the industrial personal computer 8. The industrial personal computer 8 operates a control algorithm by taking image data as input, and calculates to obtain control signals of the deformable liquid lens 2 and the electric zoom lens 4, so that closed-loop control is formed, and regulation and control of a laser line are realized. The actually adopted control algorithm can be a classical wavefront-free self-adaptive iterative algorithm such as a random parallel gradient descent (SPGD) algorithm, a genetic algorithm and the like. The control algorithm of the present embodiment is intended to adopt a random parallel gradient descent (SPGD) algorithm.
In this embodiment, all the above devices are installed in a sealed cabin 9, and the sealed cabin 9 is provided with an optical glass window 6 and a watertight connector 10, and the watertight connector 10 and the optical glass window 6 are matched, so as to meet the application requirements of the laser emitting device in special environments.
The foregoing is merely a preferred embodiment of the present invention, and those skilled in the art will appreciate that the basic concepts of the present invention may be implemented in a number of different ways with the advancement of technology, and thus, the present invention and its embodiments are not limited to the examples described above. Any changes or substitutions which can be easily conceived by a person skilled in the art within the technical scope of the present invention are covered by the protection scope of the present invention, which is defined by the claims.
Claims (9)
1. A laser emitting device with adjustable laser lines is characterized by comprising: the laser beam emitter, the deformable liquid lens, the cylindrical lens, the electric control variable-focus lens, the spectroscope, the image sensor and the industrial personal computer are coaxial in the vertical direction, the image sensor and the spectroscope are coaxial in the horizontal direction, and the deformable liquid lens, the electric control variable-focus lens and the image sensor are all connected with the industrial personal computer through signal lines.
2. The laser emitting device with the adjustable laser line as claimed in claim 1, wherein the laser beam emitter comprises a laser and a laser collimator, the laser emitted by the laser beam emitter is parallel light, and the diameter of the laser beam is smaller than the clear aperture of the deformable liquid lens.
3. The laser emitting device with the adjustable laser line as claimed in claim 1, wherein: the deformable liquid lens comprises two circular lenses and a plurality of actuators surrounding the circumferences of the circular lenses, and transparent mineral oil is filled between the two lenses.
4. The laser emitting device with the adjustable laser line as claimed in claim 3, wherein: the actuator generates deformation by extruding the two lenses, and changes the optical paths of the light beams passing through the deformable liquid lens at different positions in the direction vertical to the light beams.
5. The laser emitting device with the adjustable laser line as claimed in claim 3, wherein: the actuator is connected with the industrial personal computer through a driver, and the driver converts a control signal of the industrial personal computer into a voltage applied to the actuator.
6. The laser emitting device with the adjustable laser line as claimed in claim 1, wherein: the focal length of the cylindrical lens is F1For converting an incident laser beam of diameter D into an output laser line focused in the y-direction, extended in the x-direction and propagated in the z-direction, the output laser line having a maximum widthw max Calculated by the following formula:
7. the laser emitting device with the adjustable laser line as claimed in claim 6, wherein: the focal length of the electric control variable focus lens is a variable F2The focal length F of the lens system is calculated by the following formula:
and d is the distance between the electrically controlled variable focus lens and the cylindrical lens, and when the surface of the target object is positioned at the imaging surface of the electrically controlled variable focus lens F, the width of the laser line is the minimum.
8. The laser emitting device with the adjustable laser line as claimed in claim 1, wherein: the laser beam emitter, the deformable liquid lens, the cylindrical lens, the electric control variable focus lens, the spectroscope, the image sensor and the industrial personal computer are all arranged in the sealed cabin, an optical glass window is arranged on the sealed cabin, and laser passes through the optical glass window to be emitted.
9. The laser emitting device with the adjustable laser line as claimed in claim 8, wherein: the sealed cabin is provided with a watertight connector, and the laser beam emitter and the power line of the industrial personal computer are connected with the outside through the watertight connector.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202020919211.6U CN212623339U (en) | 2020-05-27 | 2020-05-27 | Laser emitting device with adjustable laser line |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202020919211.6U CN212623339U (en) | 2020-05-27 | 2020-05-27 | Laser emitting device with adjustable laser line |
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| Publication Number | Publication Date |
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| CN212623339U true CN212623339U (en) | 2021-02-26 |
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| CN202020919211.6U Expired - Fee Related CN212623339U (en) | 2020-05-27 | 2020-05-27 | Laser emitting device with adjustable laser line |
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| CN (1) | CN212623339U (en) |
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- 2020-05-27 CN CN202020919211.6U patent/CN212623339U/en not_active Expired - Fee Related
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