CN107942612A - The optical projection apparatus and its method for packing of the film containing monitoring - Google Patents
The optical projection apparatus and its method for packing of the film containing monitoring Download PDFInfo
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- CN107942612A CN107942612A CN201711191626.5A CN201711191626A CN107942612A CN 107942612 A CN107942612 A CN 107942612A CN 201711191626 A CN201711191626 A CN 201711191626A CN 107942612 A CN107942612 A CN 107942612A
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- light source
- film
- monitoring
- substrate
- projection apparatus
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- 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
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- 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
- G03B21/2053—Intensity control of illuminating light
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- General Physics & Mathematics (AREA)
- Engineering & Computer Science (AREA)
- Multimedia (AREA)
- Signal Processing (AREA)
- Optics & Photonics (AREA)
- Length Measuring Devices By Optical Means (AREA)
Abstract
The present invention provides a kind of optical projection apparatus and its method for packing of the film containing monitoring, and device includes：Substrate, for fixed light source and carrying lens barrel；Wherein, the light source is used to launch light beam；Lens, on the lens barrel, for receiving and converging the light beam of the light source transmitting；Transparent substrate, on the lens barrel, diffraction pattern structure is contained in the transparent substrate side, for receiving the light beam after lens convergence and projecting patterned beam；Film is monitored, including the transparent conductive film being attached on the transparent substrate surface corresponding with surface where the diffraction pattern structure；Control circuit, is electrically connected with the monitoring film and the light source, and the luminance of the light source is controlled by measuring the integrality of the monitoring film.To prevent optical projection apparatus from triggering laser safety problem because of the aging, damage, deformation of transparent substrate or DOE.
Description
Technical field
The present invention relates to optics and opto-electronics, more particularly to a kind of optical projection apparatus of film containing monitoring and its
Method for packing.
Background technology
Optical projection apparatus is widely used in the fields such as the 3-D scanning of object, space three-dimensional reconstruction, human-computer interaction.Light
Projection arrangement is learned by projecting coding or the special light pattern such as structuring, can be to the spatial information of target object into rower
Note, preparation is provided for the information gathering and three-dimensional reconstruction of later image harvester.
Optical projection apparatus for projective structure light beam generally comprises light source, diffraction optical element (DOE).Wherein,
Diffraction optical element is used for the light beam for receiving light source transmitting, and the light beam that light source is launched is split, overlap processing, to obtain
It is evenly distributed and incoherent patterned beam.Diffraction optical element is the core optical element of optical projection apparatus, directly certainly
Determine the quality for the patterned beam that optical projection apparatus is projected, diffraction optical element performance is better, optical projection apparatus institute
The light pattern more uniform energy distribution of projection, resolution ratio is higher, and contrast is stronger, and irrelevance is better.
But in the prior art, with the increase of optical projection apparatus usage time, difference inevitably occurs in optical element
The aging of degree, deformation or damage phenomenon, especially diffraction optical element.Because diffraction optical element is sealed in laser projection
In device, in the case of poor heat radiation, diffraction optical element is very easy to the phenomenon for aging, deformation or damage occur.When
When aging, deformation or damage occurs in diffraction optical element, its diffracted beam ability can be decreased obviously, and cause light beam projection device
Different degrees of decline also occurs in the uniformity and contrast of the patterned beam projected, or even with serious zero level
Diffracted beam.So-called Zero-order diffractive light beam refers in the light beam of directive diffraction optical element that there is a part of light beam not to have
It is diffracted and continues across diffraction optical element and enter object space, i.e., is not diffracted optical element diffraction and is just directly entered
That a part of light beam of object space is Zero-order diffractive light beam.The energy of Zero-order diffractive light beam is often than high order diffraction beam energy
It is several orders of magnitude higher, deals with improperly, it is most likely that induces laser safety problem.
The content of the invention
The present invention is in order to solve the problems, such as that optical projection apparatus of the prior art easily induces laser safety, there is provided a kind of
The optical projection apparatus and its method for packing of the film containing monitoring.
To solve the above-mentioned problems, the technical solution adopted by the present invention is as described below：
A kind of optical projection apparatus of the film containing monitoring, including substrate, for fixed light source and carrying lens barrel；Wherein,
The light source is used to launch light beam；Lens, on the lens barrel, for receiving and converging the light beam of the light source transmitting；
Transparent substrate, on the lens barrel, diffraction pattern structure is contained in the transparent substrate side, for receiving through the lens
Light beam after convergence simultaneously projects patterned beam；Film is monitored, including is attached to and surface where the diffraction pattern structure
Transparent conductive film on the corresponding transparent substrate surface；Control circuit, with the monitoring film and light source electricity
Connection, the luminance of the light source is controlled by measuring the integrality of the monitoring film.The transparent substrate further includes
Transparent conductive film is attached with least one inclined plane or notch, the inclined plane or notch surface；Further include：Electrode or weldering
Disk, the electrode or pad are installed on the inclined plane or notch, for connecting the transparent conductive film and the control electricity
Road；It is described to control the luminance of the light source to refer to by measuring the integrality of the monitoring film：The control electricity
Low current, and the change in resistance of monitoring circuit are injected in road by continuous or compartment of terrain to the transparent conductive film, to sentence indirectly
Break the transparent substrate integrality and the light source is made relevant control operation；It is described by measuring the monitoring film
Integrality controls the luminance of the light source to refer to：The control circuit and the transparent conductive film, the light source
The single circuit formed, when the transparent conductive film integrality is destroyed, circuit is interrupted, and light source will close automatically
Close.
The present invention also provides a kind of optical projection apparatus of the film containing monitoring, the outside of the lens barrel and/or inner side are set
There is conductive metal layer；Tin ball or solder joint are provided between the lens barrel and the transparent substrate, for connecting the electrically conducting transparent
Film and the conductive metal layer；And/or tin ball or solder joint are provided between the lens barrel and the substrate, it is described for connecting
Conductive metal layer and the substrate；It is described monitoring film integrality include the transparent conductive film, the conductive metal layer,
The integrality of the substrate and the integrality connected between each other；It is described to be controlled by measuring the integrality of the monitoring film
The luminance for making the light source refers to：The control circuit is injected by continuous or compartment of terrain to the transparent conductive film
Low current, and the change in resistance of monitoring circuit, to judge the integrality of the transparent substrate indirectly and make phase to the light source
Close control operation.
The present invention also provides a kind of method for packing of the optical projection apparatus of the film containing monitoring, include the following steps：There is provided
Substrate；Light source is provided, the light source is installed in substrate, for launching light beam；Lens barrel is provided, the lens barrel is installed on the base
On bottom；Lens are provided, on the lens barrel, for receiving and converging the light beam of the light source transmitting；Transparent substrate is provided,
On the lens barrel, diffraction pattern structure is contained in the transparent substrate side, for receiving after lens convergence
Light beam and projective patterns light beam；Monitoring film is provided, including provides and is attached to and surface pair where the diffraction pattern structure
The transparent conductive film on the transparent substrate surface answered；Control circuit is provided, with the transparent conductive film and described
Light source is electrically connected, and the luminance of the light source is controlled by measuring the integrality of the monitoring film.
Beneficial effects of the present invention are：A kind of optical projection apparatus of the film containing monitoring is provided, in transparent substrate emergent light
The surface attachment layer of brittle transparent conductive film of beam side, transparent conductive film are connect by electrode/pad or tin ball/solder joint
Draw plain conductor or conductive metal layer, and together accessed with light source in control circuit.Control circuit notes transparent conductive film
Enter low current, and the change in resistance in monitoring circuit, to judge the integrality of transparent substrate or DOE indirectly.For transparent substrate
Or the integrity condition of DOE, control circuit is by the luminance of relevant control operation change light source, to prevent optical projection from filling
Put and trigger laser safety problem because of the aging, damage, deformation of transparent substrate or DOE.
Brief description of the drawings
Fig. 1 is a kind of structure diagram of the optical projection apparatus of film containing monitoring of the embodiment of the present invention.
Fig. 2 is the structure diagram of the diffraction optical element of the embodiment of the present invention.
Fig. 3 is the structure diagram of the optical projection apparatus of another film containing monitoring of the embodiment of the present invention.
Wherein, 10- substrates, 11- light sources, 12- lens barrels, 13- lens, 131- lens, 14- transparent substrates, the transparent bases of 14a-
Plate, 14b- transparent substrates, 141a- inclined planes, 142a- inclined planes, 141b- inclined planes, 142b- inclined planes, 143a- beam exits
Face, 144a- beam incident surfaces, 143b- beam exit faces, 144b- beam incident surfaces, 145a- longitudinal terminal surfaces, 146a- longitudinal ends
Face, 15- transparent conductive films, 151- electrodes or pad, 152- electrodes or pad, 161- plain conductors, 162- plain conductors,
171- tin ball either solder joint, 172- balls or solder joint, 173- tin ball or solder joint, 174- tin ball or solder joint, 181- metal layers,
182- metal layers.
Embodiment
The present invention is described in detail by specific embodiment below in conjunction with the accompanying drawings, for a better understanding of this hair
It is bright, but following embodiments are not intended to limit the scope of the invention.In addition, it is necessary to illustrate, the diagram provided in following embodiments
Only illustrate the basic conception of the present invention in a schematic way, the component related with the present invention is only shown in attached drawing rather than according to reality
Component count, shape during implementation and size are drawn, during its actual implementation shape, quantity and the ratio of each component can be it is a kind of with
The change of meaning, and its assembly layout form may also be increasingly complex.It is to be appreciated that term " on ", " under ", "front", "rear",
The orientation or position relationship of the instruction such as " interior ", " outer ", "left", "right" are based on orientation shown in the drawings or position relationship, are only
For the ease of the description embodiment of the present invention and simplified description, rather than indicate or imply that signified device or element must be with special
Fixed orientation, with specific azimuth configuration and operation, therefore be not considered as limiting the invention.
Fig. 1 is a kind of structure diagram of the optical projection apparatus of film containing monitoring according to embodiments of the present invention.This reality
Apply in example, which includes substrate 10, light source 11, lens barrel 12, lens 13, lens 131, transparent substrate 14, transparent
Conductive film 15 and control circuit (not shown).
Wherein, substrate 10 is used for fixed light source 11 and support lens barrel 12.Substrate 10 can be with heat conduction and/or conduction
One or more in the ceramics of function, metal, alloy, plastic or other material are made.Preferably, substrate 10 is to have the function of heat conduction
Ceramics and printed circuit board (PCB circuit board) be composed.
Wherein, light source 11 is fixed on the side of substrate 10 by modes such as bondings, outwards launches light beam.Light source 11 can be
The laser of vertical cavity surface transmitting or the edge-emitting laser on parallel resonance chamber surface, for outwards launching
The light beam of the suitable wavelength such as infrared, ultraviolet.Preferably, light source 11 is the two-dimentional VCSEL cores for including at least one VCSEL light source
Piece, which can outwards project wavelength and be the infrared beam of 850nm or 940nm, and can be realized according to control circuit
At least two different luminances.VCSEL array chip can be that nude film can also be by the chip after encapsulation, both areas
It is not, nude film possesses the volume and thickness of smaller, and encapsulating chip then has more preferable stability and more easily connect.
Wherein, lens barrel 12 by it is gluing, the mode such as inlay and fix on the substrate 10, for isolating extraneous natural light and peace
Put other optical elements such as lens.The material of lens barrel 12 can be the good ceramics or plastics of heat conductivility.For the ease of saturating
The installation of mirror and other optical elements, in the present embodiment, lens barrel 12 can split into some, the contact between each component
Face can pass through thermosetting glue bond.
Wherein, lens 13, lens 131 are fixed on inside lens barrel 12 by embedded, gluing mode, for receiving and converging
The light beam and outside projecting beam that light source 11 is launched, outwards project collimated light beam in one embodiment.Lens 13 and lens 131
Material can be transparent glass or resin or high molecular polymer.In the present embodiment, lens 13 and lens 131
Collectively form the colimated light system of optical projection apparatus in the embodiment.In some equivalent embodiments, colimated light system can be wrapped only
A piece of lens are included, the lens of multi-disc different attribute can also be included.
Wherein, the surface etch of 14 incident beam side of transparent substrate or diffraction pattern structure is embossed with to form diffraction light
Element (DOE) is learned, transparent substrate 14 can be process by transparent glass or transparent plastic, pass through gluing or other feasible sides
Formula is fixed on lens barrel 12, for receiving, beam splitting light beam for being emitted after lens 13, lens 131 converge, projects Energy distribution
Uniformly, the high patterned beam of contrast.When light source 11 includes multiple sub-light sources, diffraction optical element is used for sub-light source institute
The pattern of arrangement outwards projects patterned beam in a manner of mirror image is superimposed.It is understood that refer in the present embodiment
Transparent substrate 14, beam exit face 143 can project all either most patterned beam i.e. inclined planes or notches
Substantial effect will not be caused to the patterned beam of outgoing.Unlike the optical projection apparatus of the prior art, diffraction pattern
Have transparent conductive film 15, monitoring described herein on the surface of the corresponding transparent substrate 14 in surface where case structure
Film includes transparent conductive film 15；Control circuit is electrically connected with transparent conductive film 15 and light source 11, is monitored by measuring
The integrality of film controls the luminance of the light source.
In a kind of structure diagram of the optical projection apparatus of film containing monitoring shown in Fig. 1, transparent substrate 14 is emitted
The surface of light beam side includes smooth beam exit face 143 and two inclined planes or notch.
In the alternative embodiments of the present invention, the quantity of transparent substrate top incline or notch is at least one, same
It can be all inclined plane on transparent substrate, be all notch, inclined plane or notch can also be set at the same time.
In order to make it easy to understand, transparent substrate 14 is described further with Fig. 2 embodiments, it should be appreciated that Fig. 2 is shown
Structure be only used for illustrating, it is impossible to be interpreted as limitation of the present invention, in some equivalent embodiments, the structure of transparent substrate 14
It can be cut and added by laser cutting or other appropriate process by square, cuboid, cylinder or other suitable polyhedrons
Work forms.It is octahedra for " pincushion " refering to Fig. 2 (a), transparent substrate 14a in a kind of embodiment.Wherein, it is incident as light beam
Face " under " surface 144a etchings or it is embossed with diffraction pattern structure；" upper surface " 143a is smooth flat, is transparent substrate 14a
Beam exit face.In addition, between left and right longitudinal terminal surface 145a, 146a and beam exit face 143a of transparent substrate 14a also
It is to be provided with inclined plane 141a, inclined plane 142a.Inclined plane 141a, inclined plane 142a size can be according to actual conditions
Change, do not do specific limitation specifically, but it should be ensured that inclined plane 141a, inclined plane 142a will not light leak will not be to outgoing
Patterned beam impacts.
In another alternative embodiment, transparent substrate 14b is trapezoidal hexahedron, refering to Fig. 2 (b).The embodiment party
In case, including as beam incident surface " under " surface 144b etchings or be embossed with diffraction pattern structure；" upper surface " 143b is
Smooth flat, is the beam exit face of transparent substrate 14b.Inclined plane 141b, the 142b upper and lower surface of a connections at an angle,
To form a trapezoid body.Similarly, inclined plane 141a, inclined plane 142b should will not light leak will not be to the light beam of outgoing
Impact.The pincushion or trapezoidal polyhedron referred in Fig. 2 embodiments, which may be considered, indulges traditional cuboid or square
Carry out cutting acquisition to end face.In some equivalent embodiments, transparent substrate 14 can only include an inclined plane, can also
Including two or more inclined planes, for example it can be respectively cut in four apex angles of cuboid and produce four inclined planes.
Alternatively, inclined plane can also use " notch " to replace.In some alternate embodiments, transparent substrate 14 is included at least
One inclined plane and/or notch.
Back to Fig. 1, transparent conductive film 15 by be deposited, be vapor-deposited or attach etc. related feasible technique uniformly,
It is closely attached to the surface of 14 outgoing beam side of transparent substrate, including smooth flat part and/or inclined plane or notch
Part, there is good electric conductivity and/or resistive properties.It should be understood that transparent conductive film 15 is to infrared beam, purple
Outer or other specific bands light beams have higher transmissivity, and transparent conductive film 15 is to 14 diffraction light of transparent substrate
The ability of beam will not cause materially affect.Preferably, transparent conductive film 15 can be brittle transparent conductive film, and should
Transparent conductive film, which has infrared beam, is not less than 85% transmissivity, such as：ITO (tin indium oxide) or CTO (Cd2SnO4Stannic acid
Cadmium film) or CIO (CdIn2O4Metaindic acid cadmium film) film etc..
Control circuit is electrically connected with light source 11 and transparent conductive film 15, for measuring the complete of transparent conductive film 15
Property.In one embodiment, control circuit for logic circuit and is embedded into the substrate 10 or other are as independent
The complicated circuit of module.When transparent substrate 14 or DOE are remained intact, transparent conductive film 15 keeps good electric conductivity
And/or resistive properties, control circuit monitor that the resistance value in circuit tends towards stability or the ripple in a rational section substantially
Dynamic, control circuit persistently keeps the luminance of light source 11 at this time.When aging, deformation or breakage occur in transparent substrate 14 or DOE
When, transparent conductive film 15, can be different degrees of with the aging of transparent substrate 14 or DOE, deformation or damaged appearance because of its brittleness
Cracking or come off, so as to cause the conductive capability of transparent conductive film 15 or resistive properties to change, control electricity at this time
The change in resistance situation that road is monitored according to circuit, relevant control operation is made to light source 11.In some embodiments, control
The relevant control operation that circuit is implemented includes, and stops the work of optical projection apparatus, closes light source, reduces light source luminescent power
And/or send safety alarm etc..Therefore, in one embodiment, control circuit can be by continuous or compartment of terrain to described
Bright conductive film 15 injects low current, and monitors its change in resistance to judge the integrality of transparent conductive film 15, works as integrality
During destruction, light source will be reduced or switched off and endangered to avoid laser safety.In another embodiment, control circuit by light source 11 with
Transparent conductive film 15 is connected in the same circuit, and when transparent conductive film 15 is broken, circuit disconnects, and light source will close automatically
Close.
Refering to Fig. 1 embodiments, present invention also offers a kind of method for packing of the optical projection apparatus of the film containing monitoring：Light
Source 11 is bonded, is fixed on the side of substrate 10, and is accessed by plain conductor in the rigid printed circuit boards of substrate 10, rigid electric
Road plate is connected to (not shown) in control circuit by FPC.In some interchangeable method for packing, control circuit is letter
Single logic circuit, is embedded in rigid circuit board.Lens barrel 12 is gluing, is fixed on the same side that substrate 10 is provided with light source 11,
Three parts can be split as according to the setting order of lens 13, lens 131, each section uses thermosetting after lens are disposed
Glue bond, fixation.Then the transparent substrate 14 for being attached with transparent conductive film 15 is arranged on the top of lens barrel 12, and passes through thermosetting
Glue bond, fixation.Then, the inclined plane 141 in transparent substrate 14, set respectively at inclined plane 142 electrode or pad 151,
Electrode or pad 152.Finally, electrode either drawn respectively at pad 151, electrode or pad 152 plain conductor 161,
Plain conductor 162 or other feasible transmission lines, transparent conductive film 15 is electrically connected with integrity.Can at some
In the method for packing of replacement, the inclined plane of transparent substrate 14 can be substituted by notch, then electrode or pad are arranged on indentation, there.
Fig. 3 is the structure diagram of another optical projection apparatus according to embodiments of the present invention.With embodiment illustrated in fig. 1
Difference lies in, in the present embodiment, in order to be measured to the integrality of optical projection apparatus entirety, the outside of lens barrel and/
Or inner side also is provided with conductive metal layer, control circuit by the modes such as solder joint and transparent conductive film 15, conductive metal layer 181,
182nd, light source 11 connects.At this time monitor film integrality include transparent conductive film, conductive metal layer, substrate integrality with
And the integrality connected between each other；The integrality of measurement monitoring film controls the luminance of the light source to refer to：Control
Circuit processed injects low current by continuous or compartment of terrain to the transparent conductive film, and the change in resistance of monitoring circuit, with
Connect the integrality for judging the transparent substrate 14 and relevant control operation is made to light source；Can also by control circuit with it is transparent
The single circuit that conductive film 15 is formed with light source 11, when 15 integrality of transparent conductive film is destroyed, during circuit occurs
Disconnected, light source 11 will turn off.
In a kind of alternative embodiments of the present invention, when also being provided with conductive metal layer in the outside of lens barrel and/or inner side, thoroughly
Bright substrate 14 can set inclined plane or notch as shown in fig. 1, can not also set inclined plane and notch.When setting inclined plane
Or when notch, plain conductor 161, plain conductor 162 shown in Fig. 1 can be set at the same time, two kinds of detection modes are same
When be arranged in an optical projection apparatus.
As shown in figure 3, the overall dimensions of transparent substrate 14 are between the inner ring size and outer ring size of lens barrel 12.One
In a little equivalent implementations, the size of 12 outer ring of lens barrel is not less than the size of transparent substrate 14.The purpose so set is a side
Face, what transparent substrate 14 can be stablized is arranged on the top of lens barrel 12, will not be loosened or is absorbed in lens barrel with ensuring；The opposing party
Face, leaves certain gap between transparent substrate 14 and lens barrel 12, for setting tin ball or solder joint 171,172,173,174.
Conductive metal layer 181,182 is connected with transparent conductive film 15 by tin ball or solder joint.
Further, in the present embodiment, tin ball or solder joint 171,173 are separately positioned on outside transparent substrate 14 and lens barrel 12
Enclose remaining gap.The benefit so set is, on the one hand, may insure transparent conductive film 15 can reasonably with metal
Layer 181,182, which is realized, to be electrically connected；On the other hand, tin ball or solder joint 171,173 are not susceptible to ectocine and come off.It is similar
Ground, the size of substrate 10 should also be not less than the outer ring size of lens barrel 12 in setting, conductive metal layer 181,182 it is another
End, then be electrically connected by tin ball or solder joint 172,174 with substrate 10 respectively.
Function performed by control circuit except comprising with addition to the function of control circuit in the embodiment shown in Fig. 1, this reality
Apply in example, control circuit can also be realized to transparent conductive film 15, conductive metal layer 181, conductive metal layer 182, substrate 10
Integrality and the integrality that connects between each other measure.The obvious beneficial effect of the embodiment is to work as electrically conducting transparent
When the integrality of film 15 is destroyed, control circuit can realize the control to light source, for example reduce power or closing；Together
When, when DOE falling when being subjected to displacement due to optical projection apparatus, or when lens barrel 12 is subjected to displacement relative to substrate, thoroughly
Tin ball or solder joint connection 172 between bright conductive film 15, conductive metal layer 181, conductive metal layer 182 and substrate 10
And/or 174 can also fail, control circuit can be measured as the integrity violations caused by these Joint failures at this time, so as to control
Light source luminescent state processed.
The present invention also provides a kind of method for packing of optical projection apparatus, include the following steps：
1. provide substrate；
2. providing light source, the light source is installed in substrate, for launching light beam；
3. providing lens barrel, the lens barrel installation is on the substrate；
4. lens are provided, on the lens barrel, for receiving and converging the light beam of the light source transmitting；
5. providing transparent substrate, on the lens barrel, diffraction pattern structure is contained in the transparent substrate side, is used for
Receive light beam and projective patterns light beam after lens convergence；
6. provide monitoring film, including provide be attached to the diffraction pattern structure where surface it is corresponding described transparent
Transparent conductive film on substrate surface；
7. providing control circuit, it is electrically connected with the transparent conductive film and the light source, by measuring the monitoring
The integrality of film controls the luminance of the light source.
It is understood that the above method is only to prepare the preparation method for realizing the basic structure of the present invention, the present invention
Protection domain equally include the method for preparing the structure that any type in above-described embodiment can realize the present invention, and with it is existing
There is the technology in technology to be combined to the further improved method of optical projection apparatus provided by the invention.
Traditional technology is different from, the present invention refers to the optical projection apparatus containing monitoring film, and its advantage is：
The surface attachment layer of brittle transparent conductive film of transparent substrate outgoing beam side, transparent conductive film pass through electrode/pad
Either tin ball/solder joint, which connects, draws plain conductor or conductive metal layer, and is together accessed with light source in control circuit.Control circuit pair
Transparent conductive film injects low current, and the change in resistance in monitoring circuit, to judge that transparent substrate or DOE's is complete indirectly
Property.For transparent substrate or the integrity condition of DOE, control circuit by the luminance of relevant control operation change light source,
To prevent optical projection apparatus from triggering laser safety problem because of the aging, damage, deformation of transparent substrate or DOE.
It may be noted that according to the needs of implementation, each step/component described in this application can be split as more multistep
The part operation of two or more step/components or step/component, can be also combined into new step/component by suddenly/component,
To achieve the object of the present invention.
Above content is that a further detailed description of the present invention in conjunction with specific preferred embodiments, it is impossible to is assert
The specific implementation of the present invention is confined to these explanations.For those skilled in the art, do not taking off
On the premise of from present inventive concept, some equivalent substitutes or obvious modification can also be made, and performance or purposes are identical, all should
When being considered as belonging to protection scope of the present invention.
Claims (10)
- A kind of 1. optical projection apparatus of the film containing monitoring, it is characterised in that including：Substrate, for fixed light source and carrying lens barrel；Wherein, the light source is used to launch light beam；Lens, on the lens barrel, for receiving and converging the light beam of the light source transmitting；Transparent substrate, on the lens barrel, diffraction pattern structure is contained in the transparent substrate side, for receiving described in warp Lens convergence after light beam and project patterned beam；Film is monitored, including is attached to saturating on the transparent substrate surface corresponding with surface where the diffraction pattern structure Bright conductive film；Control circuit, with it is described monitoring film and the light source is electrically connected, by measure it is described monitor film integrality come Control the luminance of the light source.
- 2. the optical projection apparatus of the film containing monitoring as claimed in claim 1, it is characterised in that the transparent substrate further includes Transparent conductive film is attached with least one inclined plane or notch, the inclined plane or notch surface.
- 3. the optical projection apparatus of the film containing monitoring as claimed in claim 2, it is characterised in that further include：Electrode or pad, The electrode or pad are installed on the inclined plane or notch, for connecting the transparent conductive film and the control circuit.
- 4. the optical projection apparatus of the film containing monitoring as claimed in claim 3, it is characterised in that described by measuring the prison The integrality for surveying film controls the luminance of the light source to refer to：The control circuit injects low current, and the resistance value of monitoring circuit by continuous or compartment of terrain to the transparent conductive film Change, to judge the integrality of the transparent substrate indirectly and relevant control operation is made to the light source.
- 5. as claimed in claim 1 containing monitoring film optical projection apparatus, it is characterised in that the outside of the lens barrel and/ Or inner side is provided with conductive metal layer.
- 6. as claimed in claim 5 containing monitoring film optical projection apparatus, it is characterised in that the lens barrel with it is described transparent Tin ball or solder joint are provided between substrate, for connecting the transparent conductive film and the conductive metal layer；And/or the mirror Tin ball or solder joint are provided between cylinder and the substrate, for connecting the conductive metal layer and the substrate.
- 7. the optical projection apparatus of the film containing monitoring as described in claim 6 is any, it is characterised in that the monitoring film Integrality include the transparent conductive film, the conductive metal layer, the substrate integrality and connect between each other Integrality.
- 8. the optical projection apparatus of the film containing monitoring as claimed in claim 7, it is characterised in that described by measuring the prison The integrality for surveying film controls the luminance of the light source to refer to：The control circuit injects low current, and the resistance value of monitoring circuit by continuous or compartment of terrain to the transparent conductive film Change, to judge the integrality of the transparent substrate indirectly and relevant control operation is made to the light source.
- 9. the optical projection apparatus of the film containing monitoring as claimed in claim 1, it is characterised in that described by measuring the prison The integrality for surveying film controls the luminance of the light source to refer to：The single circuit that the control circuit is formed with the transparent conductive film, the light source, when the transparent conductive film When integrality is destroyed, circuit is interrupted, and light source will turn off.
- 10. a kind of method for packing of the optical projection apparatus of the film containing monitoring, it is characterised in that include the following steps：Substrate is provided；Light source is provided, the light source is installed in substrate, for launching light beam；Lens barrel is provided, the lens barrel installation is on the substrate；Lens are provided, on the lens barrel, for receiving and converging the light beam of the light source transmitting；Transparent substrate is provided, on the lens barrel, diffraction pattern structure is contained in the transparent substrate side, is passed through for receiving Light beam and projective patterns light beam after the lens convergence；Monitoring film is provided, including provides and is attached to the transparent substrate table corresponding with surface where the diffraction pattern structure Transparent conductive film on face；Control circuit is provided, is electrically connected with the transparent conductive film and the light source, by measuring the monitoring film Integrality controls the luminance of the light source.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
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| CN108879296A (en) * | 2018-06-26 | 2018-11-23 | 维沃移动通信有限公司 | A kind of electronic equipment and laser infrared emitter |
| CN108919511A (en) * | 2018-07-25 | 2018-11-30 | 北京小米移动软件有限公司 | Optical devices and equipment |
| CN109211135A (en) * | 2018-07-30 | 2019-01-15 | 深圳阜时科技有限公司 | A kind of sensing device, method for sensing and equipment |
| CN109638634A (en) * | 2018-12-14 | 2019-04-16 | 上海灿瑞科技股份有限公司 | A kind of radium-shine light emitting devices |
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