CN110389494A - The measuring method of laser aid and its laser projection pattern dimension - Google Patents
The measuring method of laser aid and its laser projection pattern dimension Download PDFInfo
- Publication number
- CN110389494A CN110389494A CN201910669725.2A CN201910669725A CN110389494A CN 110389494 A CN110389494 A CN 110389494A CN 201910669725 A CN201910669725 A CN 201910669725A CN 110389494 A CN110389494 A CN 110389494A
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- Prior art keywords
- laser
- distance
- mould group
- aid
- laser projection
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Classifications
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01S—RADIO DIRECTION-FINDING; RADIO NAVIGATION; DETERMINING DISTANCE OR VELOCITY BY USE OF RADIO WAVES; LOCATING OR PRESENCE-DETECTING BY USE OF THE REFLECTION OR RERADIATION OF RADIO WAVES; ANALOGOUS ARRANGEMENTS USING OTHER WAVES
- G01S17/00—Systems using the reflection or reradiation of electromagnetic waves other than radio waves, e.g. lidar systems
- G01S17/02—Systems using the reflection of electromagnetic waves other than radio waves
- G01S17/06—Systems determining position data of a target
- G01S17/08—Systems determining position data of a target for measuring distance only
-
- G—PHYSICS
- G03—PHOTOGRAPHY; CINEMATOGRAPHY; ANALOGOUS TECHNIQUES USING WAVES OTHER THAN OPTICAL WAVES; ELECTROGRAPHY; HOLOGRAPHY
- G03B—APPARATUS OR ARRANGEMENTS FOR TAKING PHOTOGRAPHS OR FOR PROJECTING OR VIEWING THEM; APPARATUS OR ARRANGEMENTS EMPLOYING ANALOGOUS TECHNIQUES USING WAVES OTHER THAN OPTICAL WAVES; ACCESSORIES THEREFOR
- G03B21/00—Projectors or projection-type viewers; Accessories therefor
- G03B21/14—Details
- G03B21/20—Lamp housings
- G03B21/2006—Lamp housings characterised by the light source
- G03B21/2033—LED or laser light sources
-
- G—PHYSICS
- G03—PHOTOGRAPHY; CINEMATOGRAPHY; ANALOGOUS TECHNIQUES USING WAVES OTHER THAN OPTICAL WAVES; ELECTROGRAPHY; HOLOGRAPHY
- G03B—APPARATUS OR ARRANGEMENTS FOR TAKING PHOTOGRAPHS OR FOR PROJECTING OR VIEWING THEM; APPARATUS OR ARRANGEMENTS EMPLOYING ANALOGOUS TECHNIQUES USING WAVES OTHER THAN OPTICAL WAVES; ACCESSORIES THEREFOR
- G03B21/00—Projectors or projection-type viewers; Accessories therefor
- G03B21/14—Details
- G03B21/20—Lamp housings
- G03B21/208—Homogenising, shaping of the illumination light
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- Physics & Mathematics (AREA)
- General Physics & Mathematics (AREA)
- Electromagnetism (AREA)
- Engineering & Computer Science (AREA)
- Optics & Photonics (AREA)
- Computer Networks & Wireless Communication (AREA)
- Radar, Positioning & Navigation (AREA)
- Remote Sensing (AREA)
- Length Measuring Devices By Optical Means (AREA)
Abstract
The invention discloses a kind of laser aid and its measuring method of laser projection pattern dimension, the laser projection mould group includes: protective shell, and the opening projected for laser is offered on the protective shell；Transmitter, the transmitter are set in the protective shell；Part is dissipated, the excitation loose mail is set between the transmitter and the opening；Image member, the image member are set between the diverging part and the opening；Wherein, the laser that the transmitter issues successively is projected through diverging part, image member and the opening.Technical solution of the present invention has the function of enriching the measuring method of the laser aid and its laser projection pattern dimension, and projected image is abundant and can calculate the advantages of obtaining the size of the pattern on perspective plane.
Description
Technical field
The present invention designs Color Laser Projection Technology field, is related specifically to a kind of laser aid and its laser projection pattern dimension
Measuring method.
Background technique
In the prior art, laser projection device can only be projected out single-point, single line image, and cannot be projected out more complicated
Pattern, for example, laser projection device in the prior art cannot be projected out annulus and pattern of the circle ring center with cross, and existing
There is the laser projection device in technology that cannot calculate the size of the pattern projected, causes laser projection device function more single
One.
Summary of the invention
The main object of the present invention is the measuring method for proposing a kind of laser aid and its laser projection pattern dimension, it is intended to
Solve the problems, such as that laser projection device function is more single in the prior art.
To achieve the above object, a kind of laser aid proposed by the present invention, the laser aid include: shell, the shell
The first exit portal and the second exit portal are offered on body；Laser projection mould group, the laser projection mould group are set to the shell
Interior, the laser projection mould group includes transmitter, diverging part, image member, and the laser that issues of the transmitter successively pass through it is described
Part, image member, the first exit portal is dissipated to project；Laser ranging module, the laser ranging module be set in the shell and
The laser that the laser ranging module projects is projected from second exit portal；Circuit main board, the laser projection mould group and
The laser ranging module is electrically connected with the circuit main board.
Preferably, the diverging part is concavees lens.
Preferably, the image member includes transparent substrate and the block piece that is set in the transparent substrate, described
Mark off transmission region and occlusion area on bright substrate, the transmission region forms the figure to be projected, on the occlusion area
The block piece is set to block or absorb laser.
Preferably, the block piece is coated on the ink layer on the occlusion area.
Preferably, the transmission region includes: circle ring area, in the center of circle of the circle ring area and the transparent substrate
Heart position is overlapped；The center in cross region, the cross region is overlapped with the center of circle of the circle ring area.
Preferably, the laser aid further include: battery, the battery and the laser projection mould group, laser ranging mould
Group, circuit main board are electrically connected；Display, the display and the laser projection mould group, laser ranging module, circuit master
Plate, battery are electrically connected.
Preferably, the laser projection mould group is consistent with the laser emitting direction of laser ranging module.
In order to achieve the above objectives, the present invention also provides a kind of measuring methods of laser projection pattern dimension, are applied to as above
Described in any item laser aids are stated, the measuring method includes:
It obtains the laser aid that laser ranging module detects and arrives the distance between perspective plane；
The laser projection mould group is obtained according to the distance and preset magnification ratio function to project on perspective plane
Pattern size.
Preferably, the magnification ratio function is obtained by following steps:
It obtains multiple groups first distance and obtains the corresponding second distance of first distance with group, wherein the first distance
For the distance between described laser aid to the perspective plane, the second distance is to be projected in pattern to fix two o'clock and projecting
Distance on face；
The proportionate relationship of first distance and second distance according to multiple groups obtains the magnification ratio function.
Preferably, described that the laser projection mould group projection is obtained according to the distance and preset magnification ratio function
The step of size of pattern on to perspective plane includes:
Between the two o'clock on corresponding regular figure is obtained according to the distance and preset magnification ratio function
Three distances；
The area of the figure on perspective plane is obtained according to the third distance.
In technical solution of the present invention, by the laser projection mould group the interior setting laser, diverging part, at
As part, the laser, diverging part, image member are set in sequence in the exit direction for the laser that the laser issues, so that
First exit portal of the laser that the transmitter issues successively through diverging part, image member and the shell projects.Wherein, the hair
Loose mail is used for upper shape for being dissipated the narrow laser that laser issues and being transferred to the image member, the image member
At the area of the pattern in need projected away, the laser after diverging projects to form corresponding pattern from the area of the pattern.To
Increase the diversity of the image of the projection of the laser projection mould group；The measuring and calculating side of the laser projection pattern dimension of invention simultaneously
Method measures the distance between laser aid and perspective plane by the laser ranging module, and passes through the distance and preset survey
The size that function obtains the pattern of laser projection is calculated, the size includes length and area etc., to solve in the prior art
The problem of laser aid has a single function.
Detailed description of the invention
In order to more clearly explain the embodiment of the invention or the technical proposal in the existing technology, to embodiment or will show below
There is attached drawing needed in technical description to be briefly described, it should be apparent that, the accompanying drawings in the following description is only this
Some embodiments of invention for those of ordinary skill in the art without creative efforts, can be with
The structure shown according to these attached drawings obtains other attached drawings.
Fig. 1 is the structural schematic diagram of one embodiment of laser aid of the invention；
Fig. 2 is the structural schematic diagram of one embodiment of laser projection mould group of the invention；
Fig. 3 is the flow diagram of one embodiment of measuring method of laser projection pattern dimension of the invention；
Fig. 4 is the flow diagram that the present invention obtains magnification ratio function
Fig. 5 is the detailed process signal of mono- embodiment of measuring method step S20 of laser projection pattern dimension of the invention
Figure.
The embodiments will be further described with reference to the accompanying drawings for the realization, the function and the advantages of the object of the present invention.
Specific embodiment
Following will be combined with the drawings in the embodiments of the present invention, and technical solution in the embodiment of the present invention carries out clear, complete
Site preparation description, it is clear that described embodiment is only a part of the embodiments of the present invention, instead of all the embodiments.Base
Embodiment in the present invention, it is obtained by those of ordinary skill in the art without making creative efforts it is all its
His embodiment, shall fall within the protection scope of the present invention.
It is to be appreciated that the directional instruction (such as up, down, left, right, before and after ...) of institute is only used in the embodiment of the present invention
In explaining in relative positional relationship, the motion conditions etc. under a certain particular pose (as shown in the picture) between each component, if should
When particular pose changes, then directionality instruction also correspondingly changes correspondingly.
In addition, the description for being related to " first ", " second " etc. in the present invention is used for description purposes only, and should not be understood as referring to
Show or imply its relative importance or implicitly indicates the quantity of indicated technical characteristic." first ", " are defined as a result,
Two " feature can explicitly or implicitly include at least one of the features.In addition, the technical solution between each embodiment can
It to be combined with each other, but must be based on can be realized by those of ordinary skill in the art, when the combination of technical solution occurs
Conflicting or cannot achieve when, will be understood that the combination of this technical solution is not present, also not the present invention claims protection model
Within enclosing.
Also referring to Fig. 1-2, a kind of laser aid 200 proposed by the present invention, the laser aid 200 further include:
Shell 201 offers the first exit portal 202 and the second exit portal 203 on the shell 201；
Laser projection mould group 100, the laser projection mould group 100 are set in the shell 201, the laser projection mould
Group 100 includes transmitter 103, diverging part 104, image member 105, and the laser that the transmitter 103 issues is successively through the hair
Loose mail 104, image member 105, the first exit portal 202 project；
Laser ranging module 204, the laser ranging module 204 is set in the shell 201 and the laser ranging
The laser that mould group 204 projects is projected from second exit portal 203；
Circuit main board 205, the laser projection mould group 100 and the laser ranging module 204 with the circuit master
Plate 205 is electrically connected, and the circuit main board 205 controls the laser projection mode and laser ranging mode of the laser aid 200
It is turned on or off, wherein the laser aid 200 can be turned on or off laser projection mode and laser ranging mould simultaneously
Formula or the laser aid 200 can only open one of mode in laser projection mode and laser ranging mode.
Specifically, referring to Fig. 2, the laser projection mould group 100 further includes protective shell 101, on the protective shell 101 also
Opening 102 is offered, first exit portal 202 is correspondingly arranged with the opening 102 so that the laser projection mould group 100 is penetrated
Laser out is projected from first exit portal 202.
In the present embodiment, by the way that the transmitter 103, diverging part 104, image member are arranged in the protective shell 101
105, while the opening 102 is opened up on the protective shell 101, the laser, diverging part 104, image member 105 and institute
It states opening 102 to be set in sequence in the exit direction for the laser that the laser issues, so that the sending of the transmitter 103 swashs
Light is successively projected through diverging part 104, image member 105, the opening 102 and first exit portal 202.Wherein, the diverging
Part 104 is for being dissipated the narrow laser that laser issues and being transferred to the image member 105, the image member 105
The area of the pattern in need being projected out is formed for upper, the laser after diverging projects to form corresponding figure from the area of the pattern
Case solves laser projection in the prior art to increase the diversity of the image of the projection of the laser projection mould group 100
The problem of mould group 100 has a single function.
In the present embodiment, the laser aid 200 is in addition to including above-mentioned for projecting the laser of various required patterns
Projective module group 100 further includes the laser ranging module for measuring the distance between the laser aid 200 and perspective plane D
204, specifically, the laser projection mould group 100 is consistent with the laser emitting direction of laser ranging module 204.Wherein, the electricity
Road mainboard 205 controls the laser projection mode of the laser aid 200 and laser ranging mode is turned on or off, to make
Various images can not only be projected by obtaining the laser aid 200, can also calculate the distance between laser aid 200 and perspective plane
The size of D and the image of projection further enrich the function of the laser aid 200.Specifically how to calculate the figure of projection
The size of picture will be described in detail in the measuring method of following laser projection pattern dimension.
Referring to Fig. 2, preferably, the diverging part 104 is concavees lens.
In the present embodiment, the diverging part 104 is concavees lens, for sending out the narrow laser that laser issues
It dissipates and is transferred to the image member 105, in other embodiments, the diverging part 104 can also be other elements, need to only guarantee pair
The narrow laser is dissipated.
Preferably, the image member 105 includes: transparent substrate (not shown), marks off transparent area in the transparent substrate
Domain and occlusion area 1052, wherein the transmission region forms the figure to be projected；Block piece 106, the block piece 106 are arranged
In the occlusion area 1052 to block or absorb laser.
In the present embodiment, the block piece 106 is set on the occlusion area 1052, so that the block piece 106
Laser is blocked or absorbs, the laser for being sent to the occlusion area 1052 can not project；And what the transmission region was formed is to need
Region corresponding to the image to be projected, for example, the transmission region is rectangular area when the region to be projected is rectangle,
It is appreciated that region corresponding to long arbitrary image can be set in the transmission region.
Preferably, the block piece 106 is the ink layer coated on the occlusion area 1052.
In the present embodiment, the block piece 106 is the ink layer coated on the occlusion area 1052, by described
Ink layer absorbs the laser for being sent to the occlusion area 1052, meanwhile, allow transmission region described in laser light on perspective plane
Projection pattern needed for upper formation.
In one embodiment, the transmission region includes: circle ring area 1053, the center of circle of the circle ring area 1053
It is overlapped with the center of the transparent substrate；Cross region 1054, the center and the annular regions in the cross region 1054
The center of circle in domain 1053 is overlapped.
In the present embodiment, by the way that transmission region is arranged to a circle ring area 1053 and is located at the circle ring area
The cross region 1054 of 1053 center location, so that the image projected is an annulus and the round position positioned at annulus
Cross, which can be used for position correction.
Preferably, the transparent substrate is glass and/or acrylic board.
In the present embodiment, the transparent substrate is glass and/or acrylic board, to guarantee that it is described that laser can penetrate
The transparent region of bright substrate forms required projection pattern, it will be understood that the transparent substrate can also be transparent for other and be had
The material of certain rigidity.
Referring to Fig. 1, preferably, the laser aid 200 further includes battery 206, the battery 206 is thrown with the laser
Shadow mould group 100, laser ranging module 204, circuit main board 205 are electrically connected.
In the present embodiment, the battery 206 and the laser projection mould group 100, laser ranging module 204, circuit master
Plate 205 is electrically connected, needed for providing to the laser projection mould group 100, laser ranging module 204, circuit main board 205
Electric energy.
Preferably, the laser aid 200 further includes display 207, the display 207 and the laser projection mould group
100, laser ranging module 204, circuit main board 205 are electrically connected.
In the present embodiment, the display 207 and the laser projection mould group 100, laser ranging module 204, circuit
Mainboard 205 is electrically connected, for showing the figure of the laser projection mould group 100 or 204 Current projection of laser ranging module
Picture may be simultaneously used for the area for the projection pattern that display measures.
Referring to Fig. 3, the present invention also provides a kind of measuring and calculating sides of laser projection pattern dimension based on above-mentioned laser aid
Method is applied to laser aid as described above, the 1st embodiment of the measuring method the following steps are included:
Step S10 obtains the laser aid that laser ranging module detects and arrives the distance between perspective plane；
In the present embodiment, the laser ranging mode of the laser ranging module can be opened by the circuit main board,
The laser aid is measured to the distance on perspective plane by the laser ranging module, the perspective plane can be the surface of wall,
It can also be the surface of projection screen, to reach more accurate measurement effect, the distance definition is that the laser ranging module arrives
The distance between described perspective plane.
Step S20 obtains the laser projection mould group according to the distance and preset magnification ratio function and projects to
The size of pattern on perspective plane.
In the present embodiment, according to defaulting in after measuring the laser aid to the distance between perspective plane
Magnification ratio function in circuit main board calculates the size for projecting to the pattern on perspective plane, and the size can be on perspective plane
The distance between pattern any two points be also possible to the area of the regular pattern on perspective plane, such as the pattern on perspective plane is
When round, it can calculate to obtain circular radius and circular area, it, can be with when the pattern on perspective plane is square for another example
Measuring and calculating obtains side length, catercorner length and the area of square etc. of square, it will be understood that the pattern on the perspective plane
The measuring method that can be arbitrary graphic pattern namely laser projection pattern dimension of the invention can be calculated to obtain the upper of arbitrary graphic pattern
The area of the distance between any two points and arbitrary graphic pattern, specifically how to obtain it is described state magnification ratio function and how
Calculate size content as described below.
In conclusion the measuring method of laser projection pattern dimension of the invention, by obtaining laser ranging module detection
The obtained laser aid arrives the distance between perspective plane, and is obtained according to the distance and preset magnification ratio function
The laser projection mould group projects to the size of the pattern on perspective plane, and the size can be the pattern on perspective plane any two
The distance between point, is also possible to the area of the pattern on perspective plane, and the pattern on the perspective plane can be regular pattern,
The measuring method that can be arbitrary graphic pattern namely laser projection pattern dimension of the invention can be calculated to obtain the upper of arbitrary graphic pattern
The distance between any two points, and the area of at least regular pattern, to increase the function of the projection arrangement and in work
Application scenarios in industry and entertainment industry.
Specifically, the applicating example in actual industrial is as follows, when to hang a ring clock on wall, by described
Laser aid projects an annulus and cross pattern above-mentioned, with the hanging position for positioning the ring clock, and passes through
The laser aid measures the laser aid to the distance of wall, and the circle on Current projection to wall is measured based on the distance
Area in ring, with judge to annulus area whether with ring clock area (this is known) unanimously, when there is inconsistency, suitably
The distance that laser aid arrives wall is adjusted, so that the area of annulus and ring clock area, and ring clock is accurately placed at the circle
In ring, the accurate suspension to ring clock is realized.Above is the simple example to the application scenarios of the laser aid, the present invention
It is not limited thereto, the laser aid can also be used in other scenes, when such as holing, for determining the tunnel for needing to dig
Area etc..
Please refer to Fig. 4 and following table, it is preferable that on the basis of above-mentioned embodiment shown in Fig. 3, the magnification ratio function is logical
Following steps are crossed to obtain:
Step S30 obtains multiple groups first distance and obtains the corresponding second distance of first distance with group, wherein is described
First distance is the distance between described laser aid to the perspective plane, and the second distance is to be projected in pattern to fix two
The distance of point on the projection surface；
The proportionate relationship of step S40, first distance and second distance according to multiple groups obtain the magnification ratio function.
| First distance D | Second distance R |
| D1 | R1 |
| D2 | R2 |
| D3 | R3 |
| …… | …… |
| Dn | Rn |
In the present embodiment, it by constantly adjusting the first distance between the laser aid and the perspective plane, measures
Multiple first distance D1, D2, D3 ... Dn, and at first distance D1, D2, D3 ... Dn, it measures to be projected in pattern and fix
Distance R1, R2, R3 ... Rn between two o'clock on the projection surface, for example, when the pattern of projection is round, can define this second away from
It is that circular radius measures the corresponding multiple second distances of multiple first distance D1, D2, D3 ... Dn in this way from R1
(namely circular radius) R1, R2, R3 ... Rn, the proportionate relationship of first distance D and second distance R according to multiple groups obtain
The magnification ratio function R=f (D)) marked in cartesian coordinate system, first distance D as abscissa, second away from
From R as ordinate, then the magnification ratio function R=f (D) may be the straight line of a band slope, it is also possible to one
Not at the curve (related with the projection performance of the laser projection device itself) of fixed magnification ratio.
Referring to Fig. 5, preferably, it is preferable that on the basis of the embodiment shown in above-mentioned Fig. 3-4, the step S20 packet
It includes:
Step S21 obtains the two o'clock on corresponding regular figure according to the distance and preset magnification ratio function
Between third distance；
Step S22 obtains the area of the figure on perspective plane according to the third distance.In the present embodiment, it is obtaining
After to the projection arrangement that the preset magnification ratio function and currently measuring obtains to the distance between perspective plane, it can obtain
It takes according to the third distance such as circle between the two o'clock on the regular figure of the distance and the preset magnification ratio function
The radius of shape, perhaps circular distance is being calculated by circular radius or according to square in square side length etc.
Side length the area etc. of square is calculated.
In one embodiment, the preset magnification ratio function can be multiple, for example, one of magnification ratio
Function is used to calculate the size of the long side of rectangle, and another magnification ratio function is used to calculate the size of the broadside of rectangle, thus root
The projected area of rectangle is calculated according to long side and broadside, other regular figures or irregular figure similarly, are not being gone to live in the household of one's in-laws on getting married herein
It states.
Specifically, which may be displayed on the display, and the display can be also used for showing
Calculate the size of the pattern on obtained perspective plane.
The above description is only a preferred embodiment of the present invention, is not intended to limit the scope of the invention, all at this
Under the inventive concept of invention, using equivalent structure transformation made by description of the invention and accompanying drawing content, or directly/use indirectly
It is included in other related technical areas in scope of patent protection of the invention.
Claims (10)
1. a kind of laser aid, which is characterized in that the laser aid includes:
Shell offers the first exit portal and the second exit portal on the shell；
Laser projection mould group, the laser projection mould group are set in the shell, the laser projection mould group include transmitter,
Part, image member are dissipated, and the laser that the transmitter issues successively is projected through the diverging part, image member, the first exit portal；
Laser ranging module, the laser ranging module are set to the laser that in the shell and the laser ranging module projects
It is projected from second exit portal；
Circuit main board, the laser projection mould group and the laser ranging module are electrically connected with the circuit main board.
2. laser aid as described in claim 1, which is characterized in that the diverging part is concavees lens.
3. laser aid as described in claim 1, which is characterized in that the image member includes transparent substrate and is set to institute
The block piece in transparent substrate is stated, transmission region and occlusion area are marked off in the transparent substrate, the transmission region is formed
The block piece is arranged to block or absorb laser on the occlusion area in the figure to be projected.
4. laser aid as claimed in claim 3, which is characterized in that the block piece is coated on the occlusion area
Ink layer.
5. laser aid as claimed in claim 3, which is characterized in that the transmission region includes:
Circle ring area, the center of circle of the circle ring area are overlapped with the center of the transparent substrate；
The center in cross region, the cross region is overlapped with the center of circle of the circle ring area.
6. laser aid as described in claim 1, which is characterized in that the laser aid further include:
Battery, the battery are electrically connected with the laser projection mould group, laser ranging module, circuit main board；
Display, the display are electrically connected with the laser projection mould group, laser ranging module, circuit main board, battery.
7. laser aid as claimed in any one of claims 1 to 6, which is characterized in that the laser projection mould group and laser ranging
The laser emitting direction of mould group is consistent.
8. a kind of measuring method of laser projection pattern dimension, which is characterized in that it is described in any item to be applied to claim 1-7
Laser aid, the measuring method include:
It obtains the laser aid that laser ranging module detects and arrives the distance between perspective plane；
The figure that the laser projection mould group projects on perspective plane is obtained according to the distance and preset magnification ratio function
The size of case.
9. the measuring method of laser projection pattern dimension as claimed in claim 8, which is characterized in that the magnification ratio function
It is obtained by following steps:
It obtains multiple groups first distance and obtains the corresponding second distance of first distance with group, wherein the first distance is institute
Laser aid is stated the distance between to the perspective plane, the second distance is to be projected in pattern to fix two o'clock on the projection surface
Distance；
The proportionate relationship of first distance and second distance according to multiple groups obtains the magnification ratio function.
10. the measuring method of laser projection pattern dimension as claimed in claim 9, which is characterized in that it is described according to away from
From and preset magnification ratio function obtain the size for the pattern that the laser projection mould group projects on perspective plane the step of
Include:
According to the distance and preset magnification ratio function obtain the third between the two o'clock on corresponding regular figure away from
From；
The area of the figure on perspective plane is obtained according to the third distance.
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| CN201910669725.2A CN110389494A (en) | 2019-07-23 | 2019-07-23 | The measuring method of laser aid and its laser projection pattern dimension |
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Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110764341A (en) * | 2019-10-30 | 2020-02-07 | 明基智能科技（上海）有限公司 | Projector with a light source |
| CN110864677A (en) * | 2019-12-03 | 2020-03-06 | 中国矿业大学(北京) | Square profile laser marking method and device based on optical reflection and refraction |
| CN114531767A (en) * | 2022-04-20 | 2022-05-24 | 深圳市宝润科技有限公司 | Visual X-ray positioning method and system for handheld X-ray machine |
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| CN110864677A (en) * | 2019-12-03 | 2020-03-06 | 中国矿业大学(北京) | Square profile laser marking method and device based on optical reflection and refraction |
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