CN109973858A - A kind of luminaire for underwater dark-field imaging - Google Patents
A kind of luminaire for underwater dark-field imaging Download PDFInfo
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- CN109973858A CN109973858A CN201711455647.3A CN201711455647A CN109973858A CN 109973858 A CN109973858 A CN 109973858A CN 201711455647 A CN201711455647 A CN 201711455647A CN 109973858 A CN109973858 A CN 109973858A
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- luminaire
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- 238000003384 imaging method Methods 0.000 title claims abstract description 90
- 238000005286 illumination Methods 0.000 claims abstract description 35
- 239000003086 colorant Substances 0.000 claims abstract description 5
- 230000003287 optical effect Effects 0.000 claims description 59
- 230000005540 biological transmission Effects 0.000 claims description 32
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- 230000005855 radiation Effects 0.000 claims description 4
- 238000005538 encapsulation Methods 0.000 claims description 3
- 238000012634 optical imaging Methods 0.000 claims description 3
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- 238000001514 detection method Methods 0.000 claims description 2
- 238000009738 saturating Methods 0.000 claims description 2
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- 108010034145 Helminth Proteins Proteins 0.000 description 4
- 241001025261 Neoraja caerulea Species 0.000 description 4
- 244000000013 helminth Species 0.000 description 4
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- 230000015572 biosynthetic process Effects 0.000 description 3
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- 238000012986 modification Methods 0.000 description 3
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- 239000013618 particulate matter Substances 0.000 description 3
- 230000002776 aggregation Effects 0.000 description 2
- 238000004220 aggregation Methods 0.000 description 2
- 230000030833 cell death Effects 0.000 description 2
- 230000008859 change Effects 0.000 description 2
- 238000005265 energy consumption Methods 0.000 description 2
- 230000003760 hair shine Effects 0.000 description 2
- 238000012625 in-situ measurement Methods 0.000 description 2
- 244000005706 microflora Species 0.000 description 2
- 239000000203 mixture Substances 0.000 description 2
- 230000029264 phototaxis Effects 0.000 description 2
- 230000002035 prolonged effect Effects 0.000 description 2
- 230000001172 regenerating effect Effects 0.000 description 2
- 230000001954 sterilising effect Effects 0.000 description 2
- 230000033228 biological regulation Effects 0.000 description 1
- 230000000747 cardiac effect Effects 0.000 description 1
- 239000003795 chemical substances by application Substances 0.000 description 1
- 238000005260 corrosion Methods 0.000 description 1
- 230000007797 corrosion Effects 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 239000005350 fused silica glass Substances 0.000 description 1
- 239000011521 glass Substances 0.000 description 1
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- A—HUMAN NECESSITIES
- A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
- A61L—METHODS OR APPARATUS FOR STERILISING MATERIALS OR OBJECTS IN GENERAL; DISINFECTION, STERILISATION OR DEODORISATION OF AIR; CHEMICAL ASPECTS OF BANDAGES, DRESSINGS, ABSORBENT PADS OR SURGICAL ARTICLES; MATERIALS FOR BANDAGES, DRESSINGS, ABSORBENT PADS OR SURGICAL ARTICLES
- A61L2/00—Methods or apparatus for disinfecting or sterilising materials or objects other than foodstuffs or contact lenses; Accessories therefor
- A61L2/02—Methods or apparatus for disinfecting or sterilising materials or objects other than foodstuffs or contact lenses; Accessories therefor using physical phenomena
- A61L2/08—Radiation
- A61L2/10—Ultraviolet radiation
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F21—LIGHTING
- F21S—NON-PORTABLE LIGHTING DEVICES; SYSTEMS THEREOF; VEHICLE LIGHTING DEVICES SPECIALLY ADAPTED FOR VEHICLE EXTERIORS
- F21S8/00—Lighting devices intended for fixed installation
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F21—LIGHTING
- F21V—FUNCTIONAL FEATURES OR DETAILS OF LIGHTING DEVICES OR SYSTEMS THEREOF; STRUCTURAL COMBINATIONS OF LIGHTING DEVICES WITH OTHER ARTICLES, NOT OTHERWISE PROVIDED FOR
- F21V19/00—Fastening of light sources or lamp holders
- F21V19/001—Fastening of light sources or lamp holders the light sources being semiconductors devices, e.g. LEDs
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F21—LIGHTING
- F21V—FUNCTIONAL FEATURES OR DETAILS OF LIGHTING DEVICES OR SYSTEMS THEREOF; STRUCTURAL COMBINATIONS OF LIGHTING DEVICES WITH OTHER ARTICLES, NOT OTHERWISE PROVIDED FOR
- F21V33/00—Structural combinations of lighting devices with other articles, not otherwise provided for
-
- G—PHYSICS
- G02—OPTICS
- G02B—OPTICAL ELEMENTS, SYSTEMS OR APPARATUS
- G02B21/00—Microscopes
- G02B21/06—Means for illuminating specimens
- G02B21/08—Condensers
- G02B21/10—Condensers affording dark-field illumination
-
- G—PHYSICS
- G02—OPTICS
- G02B—OPTICAL ELEMENTS, SYSTEMS OR APPARATUS
- G02B21/00—Microscopes
- G02B21/36—Microscopes arranged for photographic purposes or projection purposes or digital imaging or video purposes including associated control and data processing arrangements
- G02B21/361—Optical details, e.g. image relay to the camera or image sensor
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- H—ELECTRICITY
- H05—ELECTRIC TECHNIQUES NOT OTHERWISE PROVIDED FOR
- H05B—ELECTRIC HEATING; ELECTRIC LIGHT SOURCES NOT OTHERWISE PROVIDED FOR; CIRCUIT ARRANGEMENTS FOR ELECTRIC LIGHT SOURCES, IN GENERAL
- H05B45/00—Circuit arrangements for operating light-emitting diodes [LED]
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F21—LIGHTING
- F21Y—INDEXING SCHEME ASSOCIATED WITH SUBCLASSES F21K, F21L, F21S and F21V, RELATING TO THE FORM OR THE KIND OF THE LIGHT SOURCES OR OF THE COLOUR OF THE LIGHT EMITTED
- F21Y2113/00—Combination of light sources
- F21Y2113/10—Combination of light sources of different colours
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F21—LIGHTING
- F21Y—INDEXING SCHEME ASSOCIATED WITH SUBCLASSES F21K, F21L, F21S and F21V, RELATING TO THE FORM OR THE KIND OF THE LIGHT SOURCES OR OF THE COLOUR OF THE LIGHT EMITTED
- F21Y2115/00—Light-generating elements of semiconductor light sources
- F21Y2115/10—Light-emitting diodes [LED]
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- Physics & Mathematics (AREA)
- Engineering & Computer Science (AREA)
- General Engineering & Computer Science (AREA)
- Health & Medical Sciences (AREA)
- Analytical Chemistry (AREA)
- Chemical & Material Sciences (AREA)
- General Physics & Mathematics (AREA)
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- Animal Behavior & Ethology (AREA)
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Abstract
The present invention provides a kind of luminaire for underwater dark-field imaging, the luminaire is controlled by imaging system, the luminaire is located at the imaging region of the imaging system, and the luminaire includes the structural member being closed and the multiple lighting units being distributed on the structural member.The lighting unit can be made of central wavelength in one of red, green, blue three-color LED, any two or all three kinds, while include the ultraviolet leds of UVC wave band.The multiple lighting units for constituting luminaire must include the visible LED of three kinds of colors of red, green, blue；Wherein, ultraviolet leds and other lighting units form " plug hole formula " distribution.The direction of illumination of the light beam of the lighting unit perpendicular to the structural member central axis and towards the direction of the central axis.Provided by the present invention for the luminaire of underwater dark-field imaging, the accuracy of imaging results can be improved, while aquatic organism being delayed to adhere to.
Description
Technical field
The present invention relates to technical field of lighting fixtures, in particular to a kind of luminaire for underwater dark-field imaging.
Background technique
Underwater tiny organism and particulate matter are the important components in water environment.Study these tiny organisms and particulate matter
There are important scientific meaning and application value to subjects such as water environment science, microbiology, Marine Sciences, ecology.Under water
Dark field imaging technique is the important means for obtaining and studying underwater tiny organism and particulate matter information, and how to realize underwater dark field
The illumination of imaging is to obtain one of the key factor of the underwater micro- or microspur imaging of high quality.Due to underwater environment complexity, water
The effects of body itself is to the refraction of light, scattering, obtains high contrast, high-resolution color image to entire dark-ground illumination skill
Art proposes very high requirement.
Current dark-ground illumination equipment generallys use a kind of annular light cone dark-ground illumination, using the LED of circular distribution as
The direct projection direction of luminaire, LED is opposite with imaging lens imaging direction, and with camera lens optical axis at a special angle.Annular LED shines
The light that funerary objects issues converges within the scope of the Depth of field of imaging lens.The direct light of LED shines directly into target object, still
Not directly into camera lens.Camera lens is by collecting the scattering light imaging that direct light is formed on target object, to form dark field
Illumination.
However, the white light LEDs that current dark-ground illumination equipment uses be blue light by central wavelength near 450nm and by
The wide range yellow light combine that blue light activated fluorescent powder is sent out forms, and the sensitive chip of the camera of imaging system is to red, green, blue three
The response of a wave band is usually comparable, therefore camera image under White-light LED illumination can show a kind of blueing effect, this is tight
The color information of imageable target itself is changed again, so that the result of imaging is not accurate enough.
Summary of the invention
The present invention provides a kind of luminaire for underwater dark-field imaging, can be improved the accuracy of imaging results.
To achieve the above object, the application provides a kind of luminaire for underwater dark-field imaging, and the luminaire is controlled
In imaging system, the luminaire is located at the imaging region of the imaging system, the luminaire include the structural member of closure with
And multiple lighting units on the structural member are distributed in, multiple lighting units surround the circular axis of the structural member
In being angularly distributed, the luminaire includes the ultraviolet light of multiple visible LEDs and UVC wave band in different central wavelengths
LED, wherein the sense in the red-green-blue color sensitometric curve of the central wavelength of the multiple visible LED and the imaging system
Photopeak value corresponds；The direction of illumination of the light beam of the lighting unit perpendicular to the structural member central axis and towards described
The direction of central axis.
Further, the lighting unit can by central wavelength one of red, green, blue three-color LED, appoint
Two or all three kinds of anticipating are constituted, while including the ultraviolet leds of UVC wave band.The multiple lighting units for constituting luminaire are necessary
Visible LED including three kinds of colors of red, green, blue, the photosensitive peak value in the red-green-blue color sensitometric curve of the imaging system
Respectively correspond red spectral band, green light band and blue wave band, it is seen that the wave band and quantity of light LED is wanted by optical imaging system
Ask decision.
Further, the irradiation area of the ultraviolet leds is on the structural member between two adjacent lighting units,
The quantity of ultraviolet leds is required to determine by UV radiation dose.
Further, the ultraviolet leds and its irradiation area be there are following geometrical relationship,
Above-mentioned first formula indicates that the entire illuminated unit of luminaire is separated into n (n >=3) a region, each ultraviolet photograph
Relationship between area pellucida domain arc length and corresponding central angle；R is the radius of curvature of circumference where optical transmission window, and L is that illumination is single
The length of first optical transmission window, α are the corresponding central angles of half arc length；Second formula indicates that ultraviolet leds must cover entire photograph
The optical transmission window region of bright unit；θ is the transmitting half-angle of ultraviolet leds；D is distance of the ultraviolet leds to optical transmission window；Third
A formula, which indicates that optical transmission window is formed by, must be greater than imaging area around circle radius of curvature；H is imaging system detector water
Square to size, v is imaging system detector vertical direction size, and M is imaging system images camera lens enlargement ratio；4th public affairs
Formula refers to that triangle should meet sine.
Further, the ultraviolet leds issue light beam according to period specified time and specified duty ratio interval, described
The UVC wave band that wave band locating for ultraviolet leds is 250 nanometers -280 nanometers.
Further, the multiple visible LED is worked under pulse mode and is touched by the camera in the imaging system
Hair, wherein the pulse width time of the visible LED is shorter than the time for exposure of camera in the imaging system.
Further, the structural member is the circle of closure or the polygon of rule, between the multiple lighting unit etc.
It is distributed on the structural member every ground, the central axis of the structural member and the optical axis of the imaging system coincide.
Further, the direction of illumination of the light beam of the lighting unit is additionally provided with the optics for the compression light beam angle of divergence
Element, so that the light beam of lighting unit transmitting forms stratiform lighting area after by the optical element；Wherein, institute
The imaging region that stratiform lighting area is in the imaging system is stated, and the thickness of layered lighting area is less than or equal to institute
State the depth of field of imaging lens in imaging system.
Further, the optical element can be cylindricality Fresnel Lenses, and laser beam compression can be realized by being also possible to other
The optical elements such as lens, reflector, prism.
Further, the luminaire further includes optical transmission window and package casing, outside the optical transmission window and the encapsulation
Shape of the shape of shell with the structural member is consistent；Wherein, the optical transmission window is in the inside of the structural member, institute
The outside that package casing is in the structural member is stated, is tightly connected between the optical transmission window and the package casing, with package
Lighting unit on the structural member and the structural member.
Therefore luminaire provided by the present application, multiple lighting units can be distributed on the structural member of closure, these
Lighting unit can cover the visible LED of different central wavelengths.The sense of the central wavelength and imaging system of these visible LEDs
Photosensitive peak value in light curve corresponds, and in this way when imaging system is imaged, can balance the color of each central wavelength
Color effect so that imaging results can more be truly reflected imageable target, and then improves the precision of imaging results.This
Outside, luminaire provided by the present application, can also include ultraviolet leds in lighting unit, and ultraviolet leds can irradiate luminaire
Region on structural member in addition to lighting apparatus, so as to inhibit various bacteriums, virus, helminth, algae biomembrane shape
At.In addition, the optical element for the compression light beam angle of divergence is additionally provided on the direction of illumination of lighting apparatus, to will shine
The light beam that bright unit issues is limited in the Depth of field of imaging system, to prevent the stray light dark field effect outside the depth of field.
Other features and advantages of the present invention will be illustrated in the following description, also, partly becomes from specification
It obtains it is clear that understand through the implementation of the invention.The objectives and other advantages of the invention can be by written explanation
Specifically noted structure is achieved and obtained in book, claims and attached drawing.
Below by drawings and examples, technical scheme of the present invention will be described in further detail.
Detailed description of the invention
Attached drawing is used to provide further understanding of the present invention, and constitutes part of specification, with reality of the invention
It applies example to be used to explain the present invention together, not be construed as limiting the invention.In the accompanying drawings:
Fig. 1 is the front view of underwater dark-field imaging luminaire；
Fig. 2 is underwater dark-field imaging schematic diagram of optical system；
Fig. 3 is the lighting unit of red, green, blue visible LED and ultraviolet leds composition；
Fig. 4 is the irradiation area schematic diagram of ultraviolet light in lighting unit；
Fig. 5 is column type Fresnel Lenses one-dimensional focusing schematic diagram；
Fig. 6 is geometrical relationship figure existing for ultraviolet light launch angle and other structures parameter.
1 is lighting unit in figure, and 2 be optical element, and 3 be optical transmission window, and 4 be package casing, and 5 be imaging system, and 6 be to shine
Funerary objects, 7 be red-light LED, and 8 be green light LED, and 9 be blue-ray LED, and 10 be ultraviolet leds, and 11 be structural member.
Specific embodiment
Hereinafter, preferred embodiments of the present invention will be described with reference to the accompanying drawings, it should be understood that preferred reality described herein
Apply example only for the purpose of illustrating and explaining the present invention and is not intended to limit the present invention.
Please refer to Fig. 1 and Fig. 2, the application provides a kind of luminaire 6 for underwater dark-field imaging, the luminaire 6 by
It controls in imaging system 5, the luminaire 6 is located at the imaging region of the imaging system 5 in the present embodiment, the illumination
Device 6 includes the structural member 11 being closed and the multiple lighting units 1 being distributed on the structural member 11.Multiple illumination lists
Member is in angularly to be distributed around the circular axis of the structural member.It include the cardiac wave in difference in the multiple lighting unit 1
Long multiple visible LEDs, wherein in the sensitometric curve of the central wavelength of the multiple visible LED and the imaging system 5
Photosensitive peak value correspond.The direction of illumination of the light beam of the lighting unit 1 perpendicular to the structural member 11 central axis and
Towards the direction of the central axis.
Referring to Fig. 3, in one embodiment, the multiple visible LED may include red-light LED (R) 7, green light
LED (G) 8 and blue-ray LED (B) 9.In practical application scene, lighting unit can be by central wavelength in three color of red, green, blue
One of LED, any two or all three kinds constitute, while including the ultraviolet leds of UVC wave band.Constitute the more of luminaire
A lighting unit must include the visible LED of three kinds of colors of red, green, blue.Specifically, the lighting unit can be feux rouges
LED, green light LED, a certain visible LED in blue-ray LED are also possible to red-light LED, green light LED, certain in blue-ray LED
Two kinds of LED or three kinds of LED combinations, form all lighting units of luminaire, must include the visible of three kinds of colors of red, green, blue
Optical band.Correspondingly, the photosensitive peak value in the sensitometric curve of the imaging system can respectively correspond red spectral band, green light band
And blue wave band.In this way, photosensitive system is when being imaged, can by the LED of current control difference central wavelength, thus
Each color is balanced, so that imaging effect is truer.
It in the present embodiment, can also include ultraviolet leds (U) 10 in the lighting unit.The ultraviolet leds can
For inhibiting the formation of various bacteriums, virus, helminth, algae biomembrane on the structural member.Specifically, the ultraviolet light
Wave band locating for LED can be UVC (UltraViolet C, short wave ultraviolet C) wave band.The wavelength of UVC wave band ultraviolet light is
250nm~280nm, the ultraviolet light of the wavelength can destroy the molecular structure of DNA or RNA in microflora organisms cell, cause to give birth to
Long property cell death and regenerative cell are dead, achieve the effect that sterilizing, therefore can inhibit various bacteriums, virus, parasitism
The formation of worm, algae biomembrane.
In the present embodiment, it is seen that light LED can work in the pulsing mode, touch by the camera in imaging system
It issues permit bright, the pulse width time of pulse is shorter than the time for exposure of camera.According to the image that camera acquires, adjusted by adjusting electric current
The luminous intensity of visible LED is saved, to change the colour temperature and intensity of illumination, improves image image quality.Certainly, it is actually answering
Used time, the visible LED can also be with continuous illuminations, and only compared to continuous illumination, on the one hand pulse mode can be reduced
On the other hand light source energy consumption can lead to the meaning that in situ measurement is lost due to aggregation because of phototaxis to avoid aquatic organism.
In addition, in the present embodiment, prolonged ultraviolet light can cause the accelerated ageing of device, therefore should be avoided
The devices such as ultraviolet leds direct irradiation visible LED.Fig. 4 and Fig. 6 are please referred to, what the ultraviolet leds of single UVC wave band issued
The light emitting angle of ultraviolet light can be slightly less than the angle of the composition between two neighboring lighting unit, in this way, ultraviolet leds issue
Light can just be irradiated on the structural member between two neighboring lighting unit, without being irradiated to lighting unit, thus
A kind of " plug hole " formula ultraviolet light layout is formed, the accelerated ageing of photoelectric device is avoided.
In conjunction with Fig. 6, specifically, the ultraviolet leds and its irradiation area there are following geometrical relationship,
Above-mentioned first formula indicates that the entire illuminated unit of luminaire is separated into n (n >=3) a region, each ultraviolet photograph
Relationship between area pellucida domain arc length and corresponding central angle；R is the radius of curvature of circumference where optical transmission window, and L is that illumination is single
The length of first optical transmission window, i.e. BC in Fig. 6, α is the ∠ FOE in the i.e. Fig. 6 of the corresponding central angle of half arc length；Second formula table
Show that ultraviolet leds must cover the optical transmission window region of entire lighting unit；θ is in i.e. Fig. 6 of transmitting half-angle of ultraviolet leds
∠GAC；D is ultraviolet leds to the AG in distance i.e. Fig. 6 of optical transmission window；Third formula indicates that optical transmission window is formed by
It must be greater than imaging area around circle radius of curvature；H is imaging system detector horizontal direction size, and v is imaging system detection
Device vertical direction size, M are imaging system images camera lens enlargement ratios；4th formula refers to that triangle AOG should meet sine
Theorem.Such as when the divergence half-angle of ultraviolet leds is 22.82 °, optical transmission window length is 10mm, ultraviolet leds and optical transmission window
Distance be 11.57mm, the radius of curvature where optical transmission window around circle is 40mm, meets above-mentioned " plug hole " design just.
In the present embodiment, ultraviolet leds can also by the way of being spaced work, according to period specified time and
Specified duty ratio interval issues light beam.For example, the optical power of the ultraviolet leds is 1mW, the duty ratio to emit beam is
50%, cycle period is 10 minutes.
In the present embodiment, the structural member 11 can be the polygon of the circle or rule that are closed, the multiple
Lighting unit 1 can be then equally spaced on the structural member, the central axis of the structural member and the imaging system
Optical axis coincides, to improve the uniformity and illumination intensity of illumination.
In the present embodiment, it is seen that the wave band and quantity of light LED can determine by the requirement of imaging system, ultraviolet light
The quantity of LED then can be required to determine by UV radiation dose.
Referring to Fig. 1, the direction of illumination of the light beam of the lighting unit 1 is also provided with for the compression light beam angle of divergence
Optical element 2 so that the light beam that the lighting unit 1 emits is by forming stratiform illumination after the optical element 2
Area.In the present embodiment, the optical element may include cylindricality Fresnel Lenses, lens, reflector, in prism at least
It is a kind of.Referring to Fig. 5, by taking Fresnel Lenses as an example, Fresnel Lenses is a kind of common optical element in illumination applications.Often
The Fresnel Lenses seen uses a series of locked grooves, casts on a plastic substrate.Each locked groove is equivalent to one solely
Vertical plane of refraction.This lens are very thin, therefore light loss caused by being absorbed as material is few.Column type Fresnel Lenses be it is a kind of only
For focusing the optical element of single dimension.The rectangular column type Fresnel that a 10mm × 10mm is had before each lighting unit is saturating
Mirror, lighting unit are placed on the focal plane of Fresnel Lenses.The either visible LED or ultraviolet leds of red, green, blue
The light beam of sending is all bound in Depth of field, to form stratiform lighting area.The layer formed by column type Fresnel Lenses
Optical axis of the shape lighting area perpendicular to imaging system.In the present embodiment, layered lighting area is in the imaging system
Imaging region, and the thickness of layered lighting area is less than or equal to the depth of field of imaging lens in the imaging system, with
Prevent the stray light dark field effect outside the depth of field.
Referring to Fig. 1, in the present embodiment, the luminaire further includes optical transmission window 3 and package casing 4, described
Shape of the shape of light window 3 and the package casing 4 with the structural member 11 is consistent.Wherein, the optical transmission window 3
Inside in the structural member 11, the package casing 4 are in the outside of the structural member 11, the optical transmission window 3 and institute
It states and is tightly connected between package casing 4, to wrap up the lighting unit 1 on the structural member 11 and the structural member 11.Specifically
Ground, the material of optical transmission window is utilized in visible light wave range and ultraviolet band has high transmittance and high-intensitive vitreous silica glass
Glass.Tightly encapsulation prevents leak between optical transmission window and package casing.Package casing uses high thermal conductivity, resistant material.Certainly,
In practical applications, optical transmission window can also select other materials according to the actual situation, the application comparison and without limitation.
In a practical application scene, luminaire provided by the present application, including red, green, blue three kinds of visible LEDs, UVC
Ultraviolet leds, optical element, optical transmission window and the package casing of wave band.Luminaire is in a kind of annular or polygonal shape.It is more
A lighting unit is in being angularly distributed on luminaire, to improve the uniformity and illumination intensity of illumination.The illumination list
Member can be to be composed of three kinds of visible LEDs of red, green, blue and ultraviolet leds, the direction of multiple lighting unit light beam irradiations
It is inside perpendicular to the axis of ring lighting；It is also possible to single visible LED and ultraviolet leds is composed, it is multiple and different
The direction of the lighting unit light beam irradiation of wave band is inside perpendicular to the axis of ring lighting.The wave band and quantity of visible LED
It is determined by the requirement of optical imaging system, the quantity of ultraviolet leds is required to determine by UV radiation dose.Before each lighting unit
Optical element can be added to compress LED in the angle of divergence of optical axis direction and form it into stratiform lighting area, position is located at imaging lens
The imaging area of head.The depth of field size that illuminating layer thickness is less than or equal to imaging lens mentions to reduce the stray light outside imaging region
The contrast of high darkfield image.Three kinds of red, green, blue of the emission center wavelength of three kinds of LED of red, green, blue and camera sensitive chip
The induction wavelength peak of color matches, and by the luminous intensity of current regulation LED, adjusts the strong light of different visible light LED
It spends to change the colour temperature and light intensity of dark-ground illumination.Visible LED all works in the pulsing mode and triggers by camera, it is seen that light
The pulsewidth of LED is shorter than the camera exposure time.Compared to continuous illumination, on the one hand pulse mode can reduce light source energy consumption, another
Aspect can lead to the meaning that in situ measurement is lost due to aggregation because of phototaxis to avoid aquatic organism.
The ultraviolet light of wavelength 250nm~280nm of UVC wave band ultraviolet light, the wavelength can destroy in microflora organisms cell
DNA or RNA molecular structure, cause growth cell death and regenerative cell dead, achieve the effect that sterilizing, because
This can inhibit the formation of various bacteriums, virus, helminth, algae biomembrane.But prolonged ultraviolet light can cause device
The accelerated ageing of part, therefore the devices such as ultraviolet leds direct irradiation visible LED should be avoided.Ultraviolet leds issue light with
Other lighting units form the space layout of a kind of " plug hole formula ", and the direction of illumination of ultraviolet leds is perpendicular in optical axis direction.It is ultraviolet
The quantity of light LED can require to determine according to ultraviolet radioactive.Ultraviolet leds emit half-angle according to the spatial distribution of visible LED
Form and determine.In order to energy saving, ultraviolet leds are not always on mode, a kind of timing of constant duration when working
Light illumination mode.In addition, the encapsulating structure material of dark ground illuminator is with the requirements such as high thermal conductivity, corrosion-resistant selection.
Therefore luminaire provided by the present application, multiple lighting units can be distributed on the structural member of closure, these
Lighting unit can cover the visible LED of different central wavelengths.The sense of the central wavelength and imaging system of these visible LEDs
Photosensitive peak value in light curve corresponds, and in this way when imaging system is imaged, can balance the color of each central wavelength
Color effect so that imaging results can more be truly reflected imageable target, and then improves the precision of imaging results.This
Outside, luminaire provided by the present application, can also include ultraviolet leds in lighting unit, and ultraviolet leds can irradiate luminaire
Region on structural member in addition to lighting apparatus, so as to inhibit various bacteriums, virus, helminth, algae biomembrane shape
At.In addition, the optical element for the compression light beam angle of divergence is additionally provided on the direction of illumination of lighting apparatus, to will shine
The light beam that bright unit issues is limited in the Depth of field of imaging system, to prevent the stray light dark field effect outside the depth of field.
Obviously, various changes and modifications can be made to the invention without departing from essence of the invention by those skilled in the art
Mind and range.In this way, if these modifications and changes of the present invention belongs to the range of the claims in the present invention and its equivalent technologies
Within, then the present invention is also intended to include these modifications and variations.
Claims (10)
1. a kind of luminaire for underwater dark-field imaging, the luminaire are controlled by imaging system, which is characterized in that the photograph
Funerary objects is located at the imaging region of the imaging system, and the luminaire includes the structural member of closure and is distributed in the structural member
On multiple lighting units, multiple lighting units around the structural member circular axis be in angularly be distributed, it is described
Luminaire include in different central wavelengths multiple visible LEDs and UVC wave band ultraviolet leds, wherein it is the multiple
Photosensitive peak value in the red-green-blue color sensitometric curve of the central wavelength of visible LED and the imaging system corresponds；Institute
The direction of illumination of the light beam of lighting unit is stated perpendicular to the central axis of the structural member and towards the direction of the central axis.
2. luminaire according to claim 1, which is characterized in that the lighting unit can by central wavelength it is red,
One of green, blue three-color LED, any two or all three kinds constitute, while including the ultraviolet leds of UVC wave band, constitute and shine
Multiple lighting units of funerary objects must include the visible LED of three kinds of colors of red, green, blue；Correspondingly, the imaging system is red
Photosensitive peak value in turquoise color sensitive curve respectively corresponds red spectral band, green light band and blue wave band, it is seen that light LED's
Wave band and quantity are determined by the requirement of optical imaging system.
3. luminaire according to claim 1 or 2, which is characterized in that the irradiation area of the ultraviolet leds is in adjacent
Two lighting units between structural member on, the quantity of ultraviolet leds is required to determine by UV radiation dose.
4. luminaire according to claim 3, which is characterized in that the ultraviolet leds and its irradiation area exist with
Lower geometrical relationship,
Wherein, first formula indicates that the entire illuminated unit of luminaire is separated into n (n >=3) a region, each ultra violet illumination area
Relationship between domain arc length and corresponding central angle；R is the radius of curvature of circumference where optical transmission window, and L is that lighting unit is saturating
The length of light window, α are the corresponding central angles of half arc length；2 second formula of formula indicate that ultraviolet leds must cover entire photograph
The optical transmission window region of bright unit；θ is the transmitting half-angle of ultraviolet leds；D is distance of the ultraviolet leds to optical transmission window；Formula
3 third formula, which indicate that optical transmission window is formed by, must be greater than imaging area around circle radius of curvature；H is imaging system detection
Device horizontal direction size, v are imaging system detector vertical direction sizes, and M is imaging system images camera lens enlargement ratio；4th
A formula refers to that triangle should meet sine.
5. luminaire according to claim 3, which is characterized in that the ultraviolet leds according to period specified time and
Specified duty ratio interval issues light beam, the UVC wave band that wave band locating for the ultraviolet leds is 250 nanometers -280 nanometers.
6. luminaire according to claim 1, which is characterized in that the multiple visible LED works under pulse mode
And triggered by the camera in the imaging system, wherein the pulse width time of the visible LED is shorter than phase in the imaging system
The time for exposure of machine.
7. luminaire according to claim 1, which is characterized in that the structural member be closure circle or rule it is more
Side shape, the multiple lighting unit are equally spaced on the structural member, the central axis of the structural member and the imaging
The optical axis of system coincides.
8. luminaire according to claim 1, which is characterized in that the direction of illumination of the light beam of the lighting unit is also set up
There is the optical element for the compression light beam angle of divergence, so that the light beam of lighting unit transmitting is passing through the optical element
Stratiform lighting area is formed later；Wherein, layered lighting area is in the imaging region of the imaging system, and layered
The thickness of lighting area is less than or equal to the depth of field of imaging lens in the imaging system.
9. luminaire according to claim 8, which is characterized in that the optical element can be cylindricality Fresnel Lenses,
The optical elements such as the lens, reflector, prism of laser beam compression can be realized by being also possible to other.
10. luminaire according to claim 8 or claim 9, which is characterized in that the luminaire further includes optical transmission window and encapsulation
Shape of the shape of shell, the optical transmission window and the package casing with the structural member is consistent；Wherein, described
Light window is in the inside of the structural member, and the package casing is in the outside of the structural member, the optical transmission window and institute
It states and is tightly connected between package casing, to wrap up the lighting unit on the structural member and the structural member.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201711455647.3A CN109973858B (en) | 2017-12-28 | 2017-12-28 | Illuminator for underwater dark field imaging |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201711455647.3A CN109973858B (en) | 2017-12-28 | 2017-12-28 | Illuminator for underwater dark field imaging |
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| CN109973858A true CN109973858A (en) | 2019-07-05 |
| CN109973858B CN109973858B (en) | 2022-03-08 |
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| Application Number | Title | Priority Date | Filing Date |
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| CN201711455647.3A Active CN109973858B (en) | 2017-12-28 | 2017-12-28 | Illuminator for underwater dark field imaging |
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| CN112858106A (en) * | 2021-02-08 | 2021-05-28 | 山东师范大学 | System and method for measuring liquid drop contact angle |
| CN113494690A (en) * | 2020-04-02 | 2021-10-12 | 中国科学院深圳先进技术研究院 | Illuminator, imaging system and imaging system control method |
| CN117214054A (en) * | 2023-11-09 | 2023-12-12 | 中国人民解放军国防科技大学 | Novel video sonde |
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| Publication number | Publication date |
|---|---|
| CN109973858B (en) | 2022-03-08 |
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