CN107870186A - A kind of optics module containing safety monitoring function - Google Patents
A kind of optics module containing safety monitoring function Download PDFInfo
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- CN107870186A CN107870186A CN201711368056.2A CN201711368056A CN107870186A CN 107870186 A CN107870186 A CN 107870186A CN 201711368056 A CN201711368056 A CN 201711368056A CN 107870186 A CN107870186 A CN 107870186A
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- conductive film
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
- G01N27/00—Investigating or analysing materials by the use of electric, electrochemical, or magnetic means
- G01N27/02—Investigating or analysing materials by the use of electric, electrochemical, or magnetic means by investigating impedance
- G01N27/04—Investigating or analysing materials by the use of electric, electrochemical, or magnetic means by investigating impedance by investigating resistance
- G01N27/041—Investigating or analysing materials by the use of electric, electrochemical, or magnetic means by investigating impedance by investigating resistance of a solid body
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01M—TESTING STATIC OR DYNAMIC BALANCE OF MACHINES OR STRUCTURES; TESTING OF STRUCTURES OR APPARATUS, NOT OTHERWISE PROVIDED FOR
- G01M11/00—Testing of optical apparatus; Testing structures by optical methods not otherwise provided for
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
- G01N27/00—Investigating or analysing materials by the use of electric, electrochemical, or magnetic means
- G01N27/02—Investigating or analysing materials by the use of electric, electrochemical, or magnetic means by investigating impedance
- G01N27/22—Investigating or analysing materials by the use of electric, electrochemical, or magnetic means by investigating impedance by investigating capacitance
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Abstract
The present invention provides a kind of optics module containing safety monitoring function, including：Optical element；Transparency carrier, transparent conductive film is attached with, the outside of the optical element is fixed on by support member, for protecting the optical element；Control circuit, electrically connected with the transparent conductive film, by monitoring the change of the transparent conductive film, assess the integrality of the transparency carrier, and then judge the integrality of optical element.The present invention sets transparency carrier in the outside of optical element, and in the surface attachment transparent conductive film of transparency carrier, by monitoring the change of transparent conductive film, indirect assessment, the integrality for judging transparency carrier in real time, and then judge the integrality of optical element, so as to play a part of safety monitoring.
Description
Technical field
The present invention relates to optics and opto-electronics, more particularly to a kind of optics module containing safety monitoring function.
Technical background
Include diversified optical element in the consumer devices such as camera, mobile phone, conventional includes：Refractive optics
Element, reflective optical devices, diffraction optical element, polarization optical element etc..Various optical elements generally require the ring in complexity
Border, at a temperature of work, therefore easily there is the phenomenon damaged；On the other hand, it is artificial to collide with, stagger along and accelerate optical element
An important factor for damage.And lack a kind of effective safety monitoring assembly in reality, so after optical element is damaged,
It can not in time find, and then cause the information gathering in later stage or data processing to produce larger deviation, more very trigger safety to ask
Topic.
For example for projecting the optical projection module of coding or structured bundle of light beams, the three-dimensional for being widely used in object is swept
Retouch, the three-dimensional reconstruction in space, the field such as man-machine interaction.By projecting the light beam of coding or structuring, target object is carried out empty
Between demarcate, gather the information gathering of module for later image and the three-dimensional reconstruction of processor provide preparation.Optical projection
Light source and diffraction optical element (DOE) are generally comprised in module, wherein, DOE is used for the light beam for receiving light source transmitting, and to divide
Beam, the mode of superposition generate patterned beam.Core components of the DOE as optical projection module, the quality of its performance is directly certainly
Determine the quality for the patterned beam that optical projection module is projected, or even have influence on the precision of later stage three-dimensional reconstruction.Damage
Optical element or DOE would generally be along with single beam of intensive light or Zero-order diffractive problem, if can not in time find, handle, pole
It is possible to induce laser safety problem.
The content of the invention
The present invention is in order to solve the safety problem that optical element and its module are likely to occur in use, there is provided a kind of
Optics module containing safety monitoring function.
Optics module provided by the invention containing safety monitoring function includes：Optical element；Transparency carrier, it is attached with transparent
Conductive film, the outside of the optical element is fixed on by support member, for protecting the optical element；Control circuit, with
The transparent conductive film electrical connection, by monitoring the change of the transparent conductive film, assesses the complete of the transparency carrier
Property, and then judge the integrality of optical element.
Compared with prior art, beneficial effects of the present invention have：Transparency carrier is fixed on to the light extraction side of optical element,
And electrically connected in its surface attachment transparent conductive film, transparent conductive film with control circuit；By monitoring electrically conducting transparent in real time
The change of film, indirect assessment, the integrality for judging transparency carrier, and then judge the integrality of optical element, so as to play
The safety monitoring of effect.
Brief description of the drawings
Fig. 1 is a kind of structural representation of optical projection module according to embodiments of the present invention.
Fig. 2 a are a kind of method of controlling security flow charts according to embodiments of the present invention.
Fig. 2 b are another method of controlling security flow charts according to embodiments of the present invention.
Fig. 3 is a kind of distribution pattern of transparent conductive film according to embodiments of the present invention.
Fig. 4 is another distribution pattern of transparent conductive film according to embodiments of the present invention.
Fig. 5 is a kind of structural representation of optical projection module according to embodiments of the present invention.
Fig. 6 a are a kind of distribution modes of transparent conductive film 16e in Fig. 5.
Fig. 6 b are a kind of distribution modes of transparent conductive film 16d in Fig. 5.
Fig. 7 is a kind of structural representation of optical projection module according to embodiments of the present invention.
Fig. 8 is a kind of structural representation of lens combination according to embodiments of the present invention.
Fig. 9 is the structural representation of another lens combination according to embodiments of the present invention.
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 relevant with the present invention is only shown in accompanying drawing rather than according to reality
Component count, shape during implementation and size are drawn, it is actual when implementing shape, quantity and the ratio of each component can be one kind with
The change of meaning, and its assembly layout form may also be increasingly complex.
Fig. 1 is a kind of structural representation of optical projection module according to embodiments of the present invention.Optics in the embodiment
Project module, including base 10, light source 11, lens barrel 12, lens combination 13, DOE14, pad 121, transparency carrier 15, transparent lead
Conductive film 16 and control circuit 18.Light source 11 is arranged on base 10, launches light beam towards lens combination 13；Lens combination
13 beam modulations for launching light source 11 are collimated light beam, and directive DOE14；Collimated light beam is expanded, is superposed to pattern by DOE14
Change in light beam directive space.Further, transparency carrier 15 is arranged on DOE14 top, is supported by pad 121, be fixed；Thoroughly
Bright conductive film 16 is attached to the surface of transparency carrier 15, is electrically connected by plain conductor with control circuit 18；Control circuit 18
By contrast, analyze transparent conductive film 16 resistance variations or transparent conductive film between capacitance variation, assess, judge
The integrality of transparency carrier 15, and the integrality according to transparency carrier 15, control the working condition of optical projection module.
Base 10 provides a supporting role, and is generally used for installing light source 11 and carries lens barrel 12.In certain embodiments, bottom
Seat 10 is additionally operable to the radiating and/or power supply of light source 11.Base 10 can be by the ceramics with heat conduction and/or conducting function, gold
One or more in category, alloy, plastic or other material are made.Preferably, base 10 by heat conduction function ceramics and printed circuit
Plate (PCB) combines.
Light source 11 is bonded, is fixed on the side of base 10, for launching light beam.Light source 11 can be vertical cavity surface
The laser of transmitting or the edge-emitting laser on parallel resonance chamber surface, the light of infrared, ultraviolet equiwavelength can be launched
Beam.In certain embodiments, light source 11 can also be that service life is long, the slow infrared or ultraviolet LED light source of optical attenuation.This hair
In bright embodiment, light source 11 preferably comprises the two dimensional VCSEL chip of at least one VCSEL light source, and the chip can outwards be thrown
Ejected wave a length of 830nm or 940nm infrared beam, and can realize that at least two is different according to relevant control circuit
Luminance.VCSEL array chip can be that nude film can also be that nude film is gathered around by the chip after encapsulation, both differences
There are smaller volume and thickness, and encapsulating chip then has more preferable stability and more easily connects.
Lens barrel 12 is pasted by epoxy glue, is fixed on the side of base 10, for isolating extraneous natural light and placement lens
The optical elements such as system 13, DOE14.Lens barrel 12 can be hollow square/rectangular parallelepiped structure or hollow circular cylinder
Or other suitable constructions, typically it is made by the one or more in the ceramics, plastics or alloy material of heat conduction.Specifically
Ground, lens barrel 12 can be integrally formed by Shooting Technique or stamping technique, can also split into several parts, discrete processing
Combination forming.For the ease of the thermal conductive ceramic lens barrel of the encapsulation of lens combination 13, preferably separate structure.It is understood that
When assembling lens barrel 12, the geometry site of light source 11 and lens combination 13 should be considered, so that light source 11 is located at lens
Near the equivalent focal length of system 13.
Lens combination 13 is embedded in inside lens barrel 12, and the contact surface between lens combination 13 and lens barrel 12 can pass through epoxy
Glue bond is fixed, and can also be bolted, for receiving and converging the light beam of the transmitting of light source 11, in one embodiment,
Outwards projection collimated light beam.The lens combination 13 can only include a piece of lens, can also include that multi-disc is identical and/or different songs
The lens of rate.The material of lens can be clear glass or resin or high molecular polymer.Preferably, lens system
System 13 includes the lens of two panels glass material.
DOE14 is process by transparency carrier, and the transparency carrier etches or is embossed with diffraction pattern, is bonded by epoxy glue
The top of lens barrel 12 is fixed on, for receiving, the light beam that beam splitting is emitted after the convergence of lens combination 13, and outwards projects energy point
The patterned beam that cloth is uniform, contrast is high.When light source 11 includes multiple sub-light sources, DOE14 is used to be arranged sub-light source
Pattern by mirror image be superimposed in a manner of outwards project patterned beam.For manufacturing DOE14 transparency carrier, its material can be with
It is glass or transparent plastic.In an embodiment of the present invention, the transparency carrier of the preferred glass materials of DOE14, which is used as, adds
Work raw material, surface etch or relief diffraction pattern in incident beam side.In some equivalent implementations, DOE14 includes
Two pieces or more than two pieces of glass or plastic, transparent substrate, incident and/or outgoing beam the surface of each piece of transparency carrier
Etch or be embossed with diffraction pattern.
Pad 121 is arranged on DOE14 top, is adhesively fixed by epoxy glue, for carrying transparency carrier 15 and dividing
Every transparency carrier 15, DOE14.Pad 121 can be hollow ring-type integrative-structure or block separate structure, typically
It is process by the one or more in the ceramics with heat conduction function, metal, alloy, plastic or other material.It is to be appreciated that
The pad 121 of separate structure, the consistent discrete pad fritter of at least two specifications should be included, so that transparency carrier 15 can
The steady top for being fixed on DOE14.For the ease of installing, the pad in the embodiment of the present invention, it is therefore preferable to which there is thermal conductivity
Integral ceramic gasket.In some equivalent embodiments, optical projection module can not also include pad 121.Specifically, can incite somebody to action
DOE14 inlays, is fixed on inside lens barrel, and using lens barrel design itself to support, fixed transparency carrier, with realize separate it is saturating
Bright substrate 15, DOE14 effect.
Transparency carrier 15 is arranged on the top of pad 121, is adhesively fixed by epoxy glue, for protecting DOE14 to avoid
DOE14 is directly exposed in air.Specifically, the surface of transparency carrier 15 includes beam incident surface, beam exit face, at some
In embodiment, in addition to it is arranged on one or more inclined end faces of the longitudinal terminal surface of transparency carrier 15.In some embodiments, thoroughly
DOE14 is sealed in lens barrel by bright substrate 15, pad 121, further to reduce the interference of extraneous steam, dust to DOE performances.
Can be clear glass, transparent plastic or other suitable materials for making the material of transparency carrier 15 similar to DOE14
Material.It is understood that because transparency carrier 15 is directly exposed in air, therefore it is required that the material for making transparency carrier 15
Matter must have stronger corrosion resistance, impact resistance, and will not cause actual shadow to the DOE14 patterned beams being emitted
Ring.It should be understood that transparency carrier described herein is actual it can be appreciated that the cover sheet that general module is included.
Transparent conductive film 16 is attached to transparency carrier 15 by the related feasible technique such as be deposited, be vapor-deposited or attach
Surface, there is good electric conductivity and/or resistive properties.It is to be appreciated that transparent conductive film 16 is to infrared beam, purple
Outer or other specific bands light beams have higher transmissivity.In an embodiment of the present invention, it is preferable that electrically conducting transparent is thin
Film 16 be preferably brittle transparent conductive film, and the transparent conductive film to infrared beam have be not less than 85% transmissivity,
Such as：ITO (tin indium oxide) or CTO (Cd2SnO4Cadmium stannate film) or CIO (CdIn2O4Metaindic acid cadmium film) film etc..Enter
One step, the transparent conductive film 16 on the surface of transparency carrier 15 is attached to, its distribution form can be distributed with random pattern, than
Such as, the distribution of grizzly bar shape, serpentine shape are distributed or are uniformly distributed, and do not limit specifically.
Control circuit 18 is electrically connected by plain conductor with transparent conductive film 16, light source 11, for measuring electrically conducting transparent
The integrality of film 16, and the working condition of control light source 11 or optical projection module.The control circuit 18, includes CPU/
Single-chip microcomputer, register or other feasible logical operation devices, can carry out interrelated logic judgement, the storage of data and control
Operation, referring specifically to Fig. 2.In a kind of implementation, as shown in Figure 2 a, the measurement of control circuit interval (for example surveyed every 1s
Amount is once) resistance value or capacitance of transparent conductive film, and by the resistance value measured or capacitance and default safety threshold
Value section is compared, and judges whether its value exceedes secure threshold section, is such as exceeded secure threshold section, is then judged the transparency carrier
Integrality is damaged, and then controls the working condition of optical projection module, i.e., makes relevant control to the luminance of light source, such as：
Close light source or reduce the luminous power of light source.In some equivalence enforcement methods, as shown in Figure 2 b, control circuit continuously measures
The resistance value or capacitance of transparent conductive film, by contrasting the resistance value or capacitance at current time and previous moment, judge
The integrality of transparent conductive film.Specifically, it is assumed that the resistance value that previous moment measures is R0Or capacitance is C0, when current
The resistance value that quarter measures is R or capacitance is C, then works as R-R0Or C-C0Value exceed default secure threshold or find R or
When significantly saltus step occurs suddenly in C, assert that the transparency carrier has damaged, and then control the working condition of optical projection module,
Close light source or reduce the luminous power of light source.The benefit so set is that control circuit can in real time, quickly judge transparent
The integrality of substrate, with exclude it is in running order in, there is situation about damaging suddenly in transparency carrier.Control circuit 18 can be sentenced
Simple decision logic circuit or integrated circuit in the rigid circuit board of disconnected logic circuit insertion base 10, with independence
Module be arranged at the medial/lateral of lens barrel 12.In a kind of embodiment, control circuit is by continuous or compartment of terrain to described transparent
Conductive film injects low current, and the change in resistance of monitoring circuit, to judge the integrality of transparent conductive film, so as to infer
State the integrality of transparency carrier.In some other embodiments, control circuit continues to inject to the transparent conductive film
Constant or alternation electric current, and voltage/capacitance variations of the transparent conductive film are detected, to judge the complete of transparent conductive film
Whole property, so as to infer the integrality of the transparency carrier.Because transparency carrier 15 carries protection DOE effect, when the ring in the external world
Border, temperature change, or the artificial damage colliding with, stagger along, being likely to result in transparency carrier 15；Once transparency carrier 15
It is damaged, then can not recurs to protection DOE effect, while DOE is there is also impaired possibility, and then cause light source transmitting
Light beam cause potential safety hazard.By judging whether transparency carrier 15 is complete, and then judge whether DOE is in by complete preservation
State or judge the integrality of whole optical projection module.
In a kind of structural representation of optical projection module 100 shown in Fig. 1, transparent conductive film 16 is evenly affixed to
The upper surface (it should be understood that upper surface here refers to the beam exit face of transparency carrier) of transparency carrier 15 is with tilting
End face or breach 151, and pad/electrode 17 is set at inclined plane or breach 151.Transparent conductive film 16 passes through electrode 17
In the plain conductor Access Control circuit 18 for locating extraction.
In a kind of embodiment, control circuit 18 can be understood as to the monitoring process of the integrality of transparency carrier 15：When saturating
When bright substrate 15 remains intact, the transparent conductive film 16 of transparency carrier upper surface is attached to, its resistive properties can be recognized
Surely it is invariable or is fluctuated in a rational resistance section, i.e., control circuit 18 monitors the resistance stabilization in loop
In rational safe Resistance section.Now, control circuit 18 keeps the normal luminous state of light source 11, and continues to monitor loop
In resistance variations.When transparency carrier 15 occurs rupturing or damaged, the electrically conducting transparent for being attached to the upper surface of transparency carrier 15 is thin
The meeting of film 16 appearance simultaneously is different degrees of to come off, is cracked, obvious so as to cause the resistive properties of transparent conductive film 16 to occur
Change, i.e., control circuit 18 monitors that the resistance in loop crosses rational safe Resistance section.Now, the basis of control circuit 18
The resistance value monitored deviates the degree in safe Resistance section, and selection reduces the luminous power of light source 11 or closes light source 11.
In similar to the optical projection module 100 shown in Fig. 1, transparent conductive film 16 can divide in another way
Cloth, referring particularly to Fig. 3.In a kind of embodiment, the form that transparent conductive film 16a can be distributed by grizzly bar shape is attached to
The upper surface of bright substrate 15.Wherein, transparent conductive film 16a includes at least two grizzly bars 161, and one end of each grizzly bar 161 is mutual
Conducting.It is understood that the grizzly bar quantity that transparent conductive film 16a is included is more, its resistance value is bigger.It is alternative at some
Embodiment in, transparent conductive film can also increase its resistance value by serpentine shape distribution.The benefit so set is,
On the one hand injection circuit value of the control circuit 18 to transparent conductive film 16a can further be reduced；In another aspect loop more
Big monitoring resistor value is advantageous to improve sensitivity of the control circuit 18 to transparent conductive film 16a Integrity Verifications.Specifically,
Control circuit 18 by temperature sensor (thermal resistance), can measure the transparent conductive film 16a of grizzly bar shape distribution change, with
Judge the integrality of transparency carrier 15 and control the luminance of light source 11.
Similarly, in the optical projection module 100 shown in Fig. 1, transparent conductive film can also be with interspersed grizzly bar shape
Mode is distributed, referring particularly to Fig. 4.In a kind of embodiment, the transparent conductive film 16b bags of the upper surface of transparency carrier 15 are attached to
Include the transparent conductive film 16b and 16c of two relatively independent grizzly bar shape distributions.Wherein, transparent conductive film 16b (or 16c)
Including at least two grizzly bars 162 (or 163), and one end between each grizzly bar has identical electrode.It is different from Fig. 3 implementations
Mode, in the embodiment, the grizzly bar 162 and grizzly bar 163 between transparent conductive film 16b and transparent conductive film 16c are mutual
Interspersed distribution, so that transparent conductive film 16c and 16b forms interdigital capacitor.Specifically, transparent conductive film 16b passes through metal
In wire Access Control circuit, driving electrodes are formed；And transparent conductive film 16c is hanging or grounding, induction electrode is formed.
Further, monitoring of the control circuit 18 to the integrality of transparency carrier 15, can be by measuring driving electrodes (grizzly bar) 162 and sense
The capacitance variations between the capacitance variations between electrode (grizzly bar) 163 or other grizzly bars are answered to assess, judge lens substrate 15
Integrality.
The benefit so set is, on the one hand, transparent need to only be led in the surface attachment of outgoing/incident beam of transparency carrier
Conductive film；On the other hand, the measurement of the capacitance variations of single capacitance electrode arrangement has higher sensitivity, that is, contributes to be lifted
Sensitivity of the transparent conductive film to transparency carrier Integrity Verification.
In some alternate embodiments, the lower surface that transparent conductive film can also be attached to transparency carrier is (transparent
The plane of incidence of the light beam of substrate 15), its form being distributed can be uniformly distributed or with random pattern, distribution of shapes.
In some other alternate embodiments, the whole surface that transparent conductive film can also be attached to transparency carrier is (including upper and lower
Surface).The capacitance variations that control circuit can be formed according to the resistance variations or transparent conductive film of transparent conductive film, are weighed
The integrality of transparency carrier is judged, to realize the control of light source luminescent state.
Fig. 5 is a kind of structural representation of optical projection module according to embodiments of the present invention.In the embodiment, optics is thrown
The structure of shadow module 200 is substantially similar with Fig. 1 embodiments, and difference is, it is thin that optical projection module 200 includes electrically conducting transparent
Film 16d, 16e.Wherein, transparent conductive film 16d is attached to DOE14 upper surface (it should be understood that surface above here
Refer to DOE14 beam exit face), transparent conductive film 16e be attached to transparency carrier 15 lower surface (transparency carrier 15
Beam incident surface), respectively by plain conductor Access Control circuit 18a.
In a kind of embodiment, control circuit 18a injects low current to transparent conductive film 16d, 16e respectively, to obtain
Transparent conductive film 16d, 16e resistance value, and transparent conductive film 16d resistance R0 is arranged to canonical reference resistance.Control
Circuit 18a processed is weighed, assessed by analyzing the change of transparent conductive film 16e resistance and reference resistance R0 ratio in real time
The integrality of transparency carrier 15 and the luminance for controlling light source.The benefit so set is, on the one hand, due to electrically conducting transparent
Film 16e is attached respectively to different optical element surfaces, therefore the optics member accompanying by the two from transparent conductive film 16d
The integrality of part will not cause to interfere；On the other hand, by monitoring both transparent conductive film 16d, 16e resistance ratio
Value, influence of the external environment (such as change of temperature) to monitoring result can be reduced (because the two residing environment mechanism is
It is the same, by numeric ratio compared with method can directly offset the changes of outside environmental elements), so as to improve control circuit 18a
To the monitoring accuracy of the integrality of transparency carrier 15.
In another embodiment, transparent conductive film is evenly affixed to the whole upper surfaces of DOE14, and transparent conductive film is then
The whole lower surface of transparency carrier 15 is evenly affixed to, so that two discrete transparent conductive film planes form capacity plate antenna,
And by plain conductor Access Control circuit.Control circuit judges transparency carrier indirectly by monitoring the change of capacity plate antenna
Integrality.
In another interchangeable embodiment, refering to Fig. 6 a and Fig. 6 b, transparent conductive film 16e1It is thin with electrically conducting transparent
Film 16d1Respectively with intert grizzly bar shape distribution form be attached to the lower surface of transparency carrier 15, DOE upper surface, with form
Two mutually corresponding discrete interdigital capacitors.Specifically, discrete interdigital capacitor can be divided into two parts of upper and lower alignment；Wherein, under
Part is the first interdigital capacitor, and top is divided into the second interdigital capacitor.First (the second) interdigital capacitor includes driving electrodes 164
(166) and induction electrode 165 (167), driving electrodes 164 are corresponding with induction electrode 167, driving electrodes 166 and induced electricity
Pole 165 is corresponding.Monitorings of the control circuit 18a to discrete interdigital capacitor can specifically pass through：1st, driving electrodes 164 and sense are measured
The capacitance variations between electrode 167 are answered to realize；2nd, the capacitance variations measured between driving electrodes 166 and induction electrode 165 are real
It is existing；3rd, the electric capacity measured between top or the driving electrodes 164 (166) and induction electrode 165 (167) of bottom interdigital capacitor becomes
Change and realize.
The benefit so set is that the change of discrete interdigital capacitor can be monitored by different measurement schemes with time-sharing multiplex
Change, further to lift sensitivity and flexibility ratio of the control circuit to transparency carrier Integrity Verification.
Fig. 7 is a kind of structural representation of optical projection module according to embodiments of the present invention.Optics in the embodiment
The structure of projection module 300 is substantially similar with Fig. 3 embodiments, and difference is, the optical projection module 300 includes transparent lead
Conductive film 16g, 16f and transparent conductive film 16i, 16h.Wherein, transparent conductive film 16g and transparent conductive film 16f divides
It is not attached to DOE14 upper surface and the lower surface of transparency carrier 15, and by financial wire Access Control circuit, to form
The monitoring electric capacity of one integrality of monitoring transparency carrier 15 is (it is to be appreciated that transparent conductive film 16g, 16f are equivalent to monitoring
Two electrodes of electric capacity)；Wherein, transparent conductive film 16i and transparent conductive film 16h adheres to the upper and lower table of pad 121 respectively
Face, and by plain conductor Access Control circuit, to form a stable reference capacitance (it is to be appreciated that transparent lead
The electrode of conductive film 16i, 16h equivalent to reference capacitance).Because pad 121 is for transparency carrier 15 and DOE14, it is
One discrete independent component, therefore the reference capacitance that transparent conductive film 16i, 16h are formed, its integrality/stability will not
Integrality/stability influence of electric capacity is monitored by transparent conductive film 16f, 16g composition.In a kind of embodiment, control
Circuit 18b judges the integrality of transparency carrier 15 by the ratio of contrastive detection electric capacity and reference capacitance, and according to transparent
The complete luminance for sexually revising light source 11 of substrate 15.
The benefit so set is：By analyzing the change of ratio of the reference capacitance with monitoring electric capacity, can effectively drop
Low extraneous factor (especially temperature) is improved assessment of the control circuit to transparency carrier integrality, sentenced to monitoring the influence of electric capacity
Disconnected accuracy rate.
Similarly, in some equivalent embodiments, the transparent conductive film 16g for being attached to the lower surface of transparency carrier 15 can be with
The upper surface of transparency carrier 15 is arranged on, being similarly attached to the transparent conductive film 16f of DOE14 upper surface can also adhere to
In DOE14 diffraction pattern face.
Traditional technological means, optical projection module provided by the invention are different from, its advantage is：Offer is attached with
The transparency carrier of transparent conductive film, transparency carrier are fixed on the DOE light extractions side of optical projection module by pad.There is provided
Control circuit, electrically connected by plain conductor with the transparent conductive film, to monitor the change of the resistance of transparent conductive film in real time
The capacitance variations that change or transparent conductive film are formed, indirect assessment, the integrality for judging transparency carrier.In addition, also set up reference
Resistance or reference capacitance, further lift accuracy rate, sensitivity that control circuit is judged transparency carrier integrality.Further
Ground, control circuit can carry out relevant control according to the integrality of transparency carrier to the luminance of optical projection module.
It should be understood that the above-mentioned embodiment referred to, the Integrity Verification of other optical elements can also be extended to, than
Such as：Applied to refraction optical element, reflective optical devices, diffraction optical element, polarization optical element, phase-shifted optical element it is complete
Whole property monitoring, the Integrity Verification of its a variety of optical element combination module can also be applied to.Its mode of texturing, do not do and have herein
Body limits, because being obvious for a person skilled in the art.
As shown in figure 8, it is a kind of structural representation of lens combination.Lens combination, especially image capture module
Imaging lens system, its integrality can directly influence imaging sensor (CCD or CMOS) acquired image quality.Damage or
The lens combination of deformation, different degrees of aberration, distortion are necessarily introduced, so as to cause the image quality of lens combination to decline.Should
Lens combination includes：Lens 19, transparency carrier 15 are arranged on the top of lens 19, are supported and fixed by pad 121, electrically conducting transparent
Film 16 is attached to the lower surface of transparency carrier 15, and is electrically connected by plain conductor with control circuit 18.It is understood that
Its transparent conductive film can also equally be distributed in the lower surface of lens combination.
Similarly, transparent conductive film is also attached to the surface of lens combination, or the surface of lens combination and pad
The surface of piece is all attached with transparent conductive film.The structural representation of another lens combination as shown in Figure 9, it is with Fig. 8's
Difference is, includes transparent conductive film 16j and 16k, passes through plain conductor Access Control circuit 18 respectively.
Similarly, transparent conductive film can be attached to the lens element of lens combination uniformly or with certain distribution pattern
Surface.Control circuit obtains loop resistance or capacitance by injecting low current to transparent conductive film, and by the resistance of acquisition
Or capacitance is compared with default threshold interval, it can be determined that whether transparent conductive film stands intact.Work as transparent conductive film
When damaging, it can be understood as different degrees of displacement or damage or deformation occurs in the lens element in lens combination.Enter
One step, when the optical element monitored is specifically integrated in functional module or active device, control circuit can also and work(
Can module or active device electrical connection.Control circuit completes optical element indirectly by judging the integrality of transparent conductive film
The monitoring of integrality, and associated safety operation is made to functional module or active device.Here associated safety operation, can be with
Work including stopping functional module or active device；Reduce functional module or the power output of active device etc..
It may be noted that according to the needs of implementation, each step/part described in this application can be split as more multistep
Suddenly/part, the part operation of two or more step/parts or step/part can be also combined into new step/part,
To realize the purpose of the present invention.
Above content is to combine specific preferred embodiment further description made for the present invention, 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. optics module containing safety monitoring function, it is characterised in that including：Optical element；Transparency carrier, transparent conductive film is attached with, the outside of the optical element is fixed on by support member, for protecting State optical element；Control circuit, electrically connected with the transparent conductive film, by monitoring the change of the transparent conductive film, described in assessment The integrality of transparency carrier, and then judge the integrality of optical element.
- 2. optics module as claimed in claim 1, it is characterised in that the transparent conductive film has resistance characteristic or composition Capacitance characteristic, the control circuit monitor that the resistance of the transparent conductive film or electric capacity exceed the threshold range of setting, then Make the prompting of optical component damage or control the working condition of optical element.
- 3. optics module as claimed in claim 2, it is characterised in that the optical element includes：Refraction optical element, reflection One or more in optical element, diffraction optical element, polarization optical element.
- 4. optics module as claimed in claim 1, it is characterised in that also include：Light source, for launching light beam；Lens combination, for receiving and converging the light beam of the light source transmitting；The optical element includes diffraction optical element, for receiving light beam and projective patterns after lens combination convergence Change light beam；The transparency carrier is arranged at the light extraction side of the optical element；The control circuit electrically connects with the light source, transparent conductive film.
- 5. optics module as claimed in claim 4, it is characterised in that the control circuit monitors the transparent conductive film Resistance or electric capacity exceed setting threshold range, then close light source or reduce light source luminous power.
- 6. optics module as claimed in claim 1, it is characterised in that the transparent conductive film is attached to the transparency carrier Light beam incident end face and/or beam exit end face, the distribution pattern of the transparent conductive film include uniform plane distribution map One or more combinations in sample, grizzly bar shape distribution pattern, serpentine shape distribution pattern, interspersed grizzly bar shape distribution pattern.
- 7. optics module as claimed in claim 6, it is characterised in that the control circuit passes through continuously or discontinuously to described flat Face is uniformly distributed pattern or the transparent conductive film of grizzly bar shape distribution pattern or serpentine shape distribution pattern injection low current, and monitors Resistance variations in loop, infer the integrality of the transparency carrier；OrThe control circuit is injected permanent by the transparent conductive film to the interspersed grizzly bar shape distribution pattern continuously or discontinuously Determine electric current or alternating current, and monitor the capacitance variations of the transparent conductive film, infer the integrality of the transparency carrier.
- 8. optics module as claimed in claim 1, it is characterised in that the light beam incident end face or light beam of the optical element go out Penetrate end face and be attached with the first transparent conductive film；The light beam incident end face of the transparency carrier or beam exit end face are attached with Two transparent conductive films；First transparent conductive film is accessed in the control circuit with second transparent conductive film.
- 9. optics module as claimed in claim 8, it is characterised in that the control circuit transparent is led by monitoring described second The change of conductive film and the resistance ratio of first transparent conductive film, assess the integrality of the transparency carrier；OrFirst transparent conductive film forms the monitoring electric capacity of the transparency carrier with second transparent conductive film；It is described Control circuit assesses the integrality of the transparency carrier by monitoring the capacitance variation of the electric capacity.
- 10. optics module as claimed in claim 8, it is characterised in that the transparency carrier is fixed on institute by pad support State above optical element, the pad upper surface is attached with the 3rd transparent conductive film with lower surface and the 4th electrically conducting transparent is thin Film；3rd transparent conductive film is accessed in the control circuit with the 4th transparent conductive film, forms reference capacitance； First transparent conductive film forms the monitoring electric capacity of the transparency carrier with second transparent conductive film；The control Circuit assesses the integrality of the transparency carrier by monitoring the change for monitoring electric capacity and the ratio of the reference capacitance.
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| CN201711368056.2A CN107870186A (en) | 2017-12-18 | 2017-12-18 | A kind of optics module containing safety monitoring function |
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| Application Number | Priority Date | Filing Date | Title |
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| CN201711368056.2A CN107870186A (en) | 2017-12-18 | 2017-12-18 | A kind of optics module containing safety monitoring function |
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| CN201711368056.2A Pending CN107870186A (en) | 2017-12-18 | 2017-12-18 | A kind of optics module containing safety monitoring function |
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| CN108553109A (en) * | 2018-05-31 | 2018-09-21 | 业成科技（成都）有限公司 | Optics module and its test method and dot matrix projector |
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| RU2788435C2 (en) * | 2018-10-15 | 2023-01-19 | Хуавей Текнолоджиз Ко., Лтд. | Optical element, system and method for monitoring of optical element, active light-emitting module and terminal device |
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| WO2021196017A1 (en) * | 2020-03-31 | 2021-10-07 | 华为技术有限公司 | Apparatus for detecting shift of diffusion film, and head-up display |
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Application publication date: 20180403 |