KR101874388B1 - Apparatus for obtaining image of fluorescent substance - Google Patents

Apparatus for obtaining image of fluorescent substance Download PDF

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Publication number
KR101874388B1
KR101874388B1 KR1020170020115A KR20170020115A KR101874388B1 KR 101874388 B1 KR101874388 B1 KR 101874388B1 KR 1020170020115 A KR1020170020115 A KR 1020170020115A KR 20170020115 A KR20170020115 A KR 20170020115A KR 101874388 B1 KR101874388 B1 KR 101874388B1
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South Korea
Prior art keywords
light
phosphor
laser diode
camera
emitted
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KR1020170020115A
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Korean (ko)
Inventor
박태광
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주식회사 이오테크닉스
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Priority to KR1020170020115A priority Critical patent/KR101874388B1/en
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Publication of KR101874388B1 publication Critical patent/KR101874388B1/en

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    • G—PHYSICS
    • G02—OPTICS
    • G02B—OPTICAL ELEMENTS, SYSTEMS OR APPARATUS
    • G02B21/00—Microscopes
    • G02B21/06—Means for illuminating specimens
    • G02B21/08—Condensers
    • G02B21/082—Condensers for incident illumination only
    • 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
    • G—PHYSICS
    • G02—OPTICS
    • G02B—OPTICAL ELEMENTS, SYSTEMS OR APPARATUS
    • G02B27/00—Optical systems or apparatus not provided for by any of the groups G02B1/00 - G02B26/00, G02B30/00
    • G02B27/10—Beam splitting or combining systems
    • G02B27/14—Beam splitting or combining systems operating by reflection only
    • G02B27/141—Beam splitting or combining systems operating by reflection only using dichroic mirrors
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01S—DEVICES USING THE PROCESS OF LIGHT AMPLIFICATION BY STIMULATED EMISSION OF RADIATION [LASER] TO AMPLIFY OR GENERATE LIGHT; DEVICES USING STIMULATED EMISSION OF ELECTROMAGNETIC RADIATION IN WAVE RANGES OTHER THAN OPTICAL
    • H01S3/00—Lasers, i.e. devices using stimulated emission of electromagnetic radiation in the infrared, visible or ultraviolet wave range
    • H01S3/09—Processes or apparatus for excitation, e.g. pumping
    • H01S3/091—Processes or apparatus for excitation, e.g. pumping using optical pumping
    • H01S3/094—Processes or apparatus for excitation, e.g. pumping using optical pumping by coherent light
    • H01S3/0941—Processes or apparatus for excitation, e.g. pumping using optical pumping by coherent light of a laser diode

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  • Physics & Mathematics (AREA)
  • Optics & Photonics (AREA)
  • General Physics & Mathematics (AREA)
  • Engineering & Computer Science (AREA)
  • Chemical & Material Sciences (AREA)
  • Analytical Chemistry (AREA)
  • Electromagnetism (AREA)
  • Multimedia (AREA)
  • Plasma & Fusion (AREA)
  • Studio Devices (AREA)
  • Investigating, Analyzing Materials By Fluorescence Or Luminescence (AREA)
  • Microscoopes, Condenser (AREA)

Abstract

An apparatus for acquiring an image of a phosphor using a laser diode is disclosed. An apparatus for acquiring an image of a phosphor includes a laser diode that emits a first light that is an illumination light; An objective lens for irradiating the phosphor with the first light emitted from the laser diode; And a camera that receives the second light emitted from the phosphor by being excited by the first light to acquire an image of the phosphor.

Description

FIELD OF THE INVENTION [0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an image capturing apparatus for a phosphor, and more particularly, to an apparatus for capturing an image of a phosphor using a laser diode.

Generally, a transparent fluorescent substance and a conductive layer formed on the fluorescent substance are provided on a printed circuit board. When such a printed circuit board is to be processed by using a laser, a desired pattern of conductive pattern can be formed by irradiating the conductive layer with a laser beam. However, since the fluorescent material includes a transparent material in such a laser machining process, there is a concern that the laser beam may also process other material layers provided below the fluorescent material.

In order to solve such a problem, it is necessary to perform a machining operation by selectively irradiating a laser beam only on a conductive layer formed on a phosphor by acquiring an image of the phosphor using a vision apparatus. Conventionally, mercury lamps, halogen lamps, and the like have been used as vision light sources for obtaining images of such phosphors. However, since a mercury lamp or a halogen lamp has a short life span and may cause heat generation and emits light having a wide range of wavelengths, an excitation filter is used to use light of a desired wavelength .

An embodiment of the present invention provides an apparatus for acquiring images of phosphors using laser diodes.

In one aspect of the present invention,

A laser diode for emitting a first light as illumination light;

An objective lens for irradiating the phosphor with the first light emitted from the laser diode; And

And a camera that receives the second light emitted from the phosphor by being excited by the first light to acquire an image of the phosphor.

The first light may include a single wavelength of light shorter than the wavelength of the second light.

The objective lens may defocus the first light emitted from the laser diode on the phosphor and irradiate the light to a larger area than a field of view (FOV) of the camera.

And the second light excited by the first light and emitted from the phosphor may be received by the camera through the objective lens.

The apparatus for acquiring an image of a phosphor includes a beam splitter for emitting the first light emitted from the laser diode to the objective lens and for emitting the second light emitted from the phosphor to the camera, ).

The beam splitter includes a dichroic mirror for reflecting the first light emitted from the laser diode toward the objective lens and transmitting the second light emitted from the phosphor to the camera through the objective lens, . ≪ / RTI >

The beam splitter may include a dichroic mirror that transmits the first light emitted from the laser diode toward the objective lens and reflects the second light emitted from the phosphor and emitted from the objective lens toward the camera You may.

A convergent lens may be provided between the laser diode and the beam splitter to converge the first light emitted from the laser diode and to enter the beam splitter.

A filter for transmitting only the second light may be provided between the beam splitter and the camera. An imaging lens may be provided between the filter and the camera to image an image of the phosphor on the camera using the second light transmitted through the filter.

The phosphor may include a Photo Imageable Dielectric (PID).

According to the embodiment of the present invention, a laser diode which emits light of a single wavelength is used as an illumination light source for exciting the phosphor. As a result, a high output laser beam can be used as the illumination light, thereby increasing the brightness of the illumination. In addition, the lifetime of the illumination light source can be greatly increased. Specifically, since the lifetime of a mercury lamp or a halogen lamp is about 1,000 to 5,000 hours, the lifetime of the laser diode is 20,000 hours. Therefore, if a laser diode is used as an illumination light source, the lifetime of the illumination light source can be greatly increased. In the present invention, since the laser diode emits light of a single wavelength, it is not necessary to use an excitation filter for obtaining only light of a specific wavelength.

1 schematically shows an apparatus for capturing an image of a phosphor according to an exemplary embodiment of the present invention.
FIG. 2 illustrates a state where the first light emitted from the laser diode is irradiated to the phosphor in the image capturing device of the phosphor shown in FIG. 1.
3 schematically shows an apparatus for capturing an image of a phosphor according to another exemplary embodiment of the present invention.
4A is a photograph of a phosphor having a Cu pattern formed thereon using a general camera.
FIG. 4B is a photograph of the phosphor having the Cu pattern shown in FIG. 4A using the image capturing device of the phosphor according to the present invention.

Hereinafter, embodiments of the present invention will be described in detail with reference to the accompanying drawings. The embodiments illustrated below are not intended to limit the scope of the invention, but rather are provided to illustrate the invention to those skilled in the art. In the drawings, like reference numerals refer to like elements, and the size and thickness of each element may be exaggerated for clarity of explanation. Further, when it is described that a certain material layer is present on a substrate or another layer, the material layer may be present directly on the substrate or another layer, and there may be another third layer in between. In addition, the materials constituting each layer in the following embodiments are illustrative, and other materials may be used.

1 schematically shows an apparatus 100 for capturing an image of a phosphor according to an exemplary embodiment of the present invention.

1, an apparatus 100 for capturing an image of a phosphor emits illumination light to a phosphor W and acquires an image of the phosphor W using light emitted by excitation of the phosphor W by the illumination light . Here, the phosphor W is provided on, for example, a printed circuit board. A conductive pattern layer (not shown) made of a conductive material such as Cu or the like may be formed on the phosphor W. For example, the phosphor W may comprise a photoimageable dielectric (PID) that is a photosensitive epoxy printed on a substrate metal layer. However, the present invention is not limited thereto.

The image capturing apparatus 100 for a phosphor includes a laser diode 110 for emitting a first light L1, an objective lens 140 for irradiating the first light L1 to the phosphor W, And a camera 170 for acquiring the image of the phosphor W by receiving the second light L2 emitted from the first light L2. The image capturing apparatus 100 for a phosphor emits the first light L1 emitted from the laser diode 110 to the objective lens 140 and is emitted from the phosphor W and emitted through the objective lens 140 And a beam splitter 130 that allows the second light L2 to be incident on the camera 170.

The laser diode 110 emits the first light L1 as the illumination light for exciting the phosphor W. Here, the first light L1 emitted from the laser diode 110 may have a single wavelength. The first light L1 emitted from the laser diode 110 may have a shorter wavelength than the second light L2 emitted from the phosphor W as described later. For example, the first light L1 may be blue light or ultraviolet light, but is not limited thereto.

In the present embodiment, the beam splitter 130 reflects the first light L1 emitted from the laser diode 100 and transmits the second light L2 emitted from the phosphor W. The dichroic mirror 130 reflects the first light L1 emitted from the laser diode 100, dichroic mirror). Therefore, the first light L1 emitted from the laser diode 110 can be reflected by the beam splitter 130 and incident on the objective lens 140. [

A convergent lens 120 may be further provided on the optical path between the laser diode 110 and the beam splitter 130 and the first light emitted from the laser diode 110 by the converging lens 120 (L1) may converge and be incident on the beam splitter 130 side.

The first light L 1 reflected by the beam splitter 130 and incident on the objective lens 140 can be irradiated to a desired region of the phosphor W by the objective lens 140. Here, the objective lens 140 irradiates the fluorescent material W with the first light L1 emitted from the laser diode 110 in a defocused state, so that the first light L1 passes through the field of view (FOV) of the camera 170 Of View).

Fig. 2 shows a state in which the first light L1 emitted from the laser diode 110 is irradiated to the phosphor W in the image capturing apparatus 100 of the phosphor shown in Fig.

Referring to FIG. 2, the first light L1 emitted from the laser diode 110 is converged by the converging lens 120 to the beam splitter 130, and the beam splitter 130 splits the first light L1 L1 to the objective lens 140 side. The objective lens 140 converges the incident first light L1 and irradiates the predetermined area of the phosphor W. [ The objective lens 140 irradiates the first light L1 at a position farther than the focal distance so that the first light L1 is irradiated onto a large area of the phosphor W by defocusing . The area irradiated with the first light L1 by the objective lens 140 onto the phosphor W may be larger than the field of view of the camera 170. [

As described above, when the first light L1 of a single wavelength emitted from the laser diode 110 is irradiated to a predetermined region of the phosphor W, the phosphor W is excited by the first light L1, (L2). The second light L2 emitted from the phosphor W may have a longer wavelength than the first light L1 emitted from the laser diode 110. [ For example, when the first light L1 is blue light or ultraviolet light, the second light L2 may be green light. However, it is not limited thereto. The first and second lights L1 and L2 may be light of various wavelengths.

Referring to FIG. 1 again, the second light L2, which is excited by the first light L1 and excited by the phosphor W, is incident on the objective lens 140, And proceeds to the beam splitter 130 through the lens 140. The beam splitter 130 reflects the first light L1 emitted from the laser diode 110 and transmits the second light L2 emitted from the phosphor W as described above . Therefore, the second light L2 emitted through the objective lens 140 can be received by the camera 170 while transmitting through the beam splitter 130.

A filter 150 may be further provided on the light path between the beam splitter 130 and the camera 170 to selectively transmit only light having a predetermined wavelength. Here, the filter 150 may transmit only the second light L2 emitted from the phosphor W selectively. An imaging lens 160 may be provided between the filter 150 and the camera 170. The imaging lens 160 may function to image the image of the phosphor W to the camera 170 using the second light L2 that has passed through the filter 150. [

The first light L1 of a single wavelength emitted from the laser diode 110 is converged through the converging lens 120 and is incident on the beam splitter 130 in the image acquisition apparatus 100 of the phosphor as described above, The splitter 130 reflects the first light L1 toward the objective lens 140 side. Then, the objective lens 140 defocuss the incident first light L1 to a position farther than the focal distance, and irradiates the fluorescent light W. When the first light L1 is irradiated to the phosphor W, the phosphor W emits the second light L2 having a shorter wavelength than the first light L1 by excitation.

The second light L2 emitted from the phosphor W is incident on the beam splitter 130 through the objective lens 140. The beam splitter 130 transmits the second light L2 to the filter 150 to the imaging lens 160 side. The image of the phosphor W is imaged on the camera 170 by using the second light L2 incident on the imaging lens 160 so that the camera 170 can obtain the image of the phosphor W. [

As described above, according to the embodiment of the present invention, a laser diode 110 which emits light of a single wavelength is used as an illumination light source for exciting the phosphor W. Conventionally, a mercury lamp or a halogen lamp is used as an illumination light source. However, since a mercury lamp or a halogen lamp has a short life span and may cause heat generation and emits light having a wide range of wavelengths, an excitation filter should be used to use light of a desired wavelength .

When the laser diode 110 is used as an illumination light source as in the present invention, high output laser light can be used as illumination light, thereby increasing brightness of illumination. In addition, the lifetime of the illumination light source can be greatly increased. In particular, since the lifetime of the mercury lamp or the halogen lamp is about 1,000 to 5,000 hours, the lifetime of the laser diode is 20,000 hours. Therefore, if the laser diode 110 is used as the illumination light source, the lifetime of the illumination light source can be greatly increased . In the present invention, since the laser diode 110 emits light of a single wavelength, it is not necessary to use an excitation filter for obtaining only light of a specific wavelength.

3 schematically shows an apparatus 200 for capturing an image of a phosphor according to another exemplary embodiment of the present invention.

3, the apparatus 200 for capturing an image of a phosphor includes a laser diode 210 for emitting a first light L1, an objective lens 240 for irradiating the first light L1 onto the phosphor W, And a camera 270 that receives the second light L2 emitted from the phosphor W and acquires an image of the phosphor W. The image capturing apparatus 200 for a phosphor emits the first light L1 emitted from the laser diode 210 to the objective lens 240 and transmits the first light L1 emitted from the phosphor W and emitted through the objective lens 240 And a beam splitter 230 for causing the second light L2 to enter the camera.

The laser diode 210 emits a first light L1 having a single wavelength that excites the phosphor W. The first light L1 emitted from the laser diode 210 may have a shorter wavelength than the second light L2 emitted from the phosphor W. [

The beam splitter 230 may be a dichroic mirror that transmits the first light L1 emitted from the laser diode 210 and reflects the second light L2 emitted from the phosphor W The first light L1 emitted from the laser diode 210 can be incident on the objective lens 240 through the beam splitter 230. [

A converging lens 220 for converging the first light L1 emitted from the laser diode 210 may be further provided on the optical path between the laser diode 210 and the beam splitter 230. [ The first light L1 transmitted through the beam splitter 230 and incident on the objective lens 240 can be irradiated to a desired region of the phosphor W by the objective lens 240. [ The objective lens 240 defocuses the first light L1 emitted from the laser diode 210 onto the fluorescent material W to deflect the first light L1 toward an area larger than the FOV of the camera 270 As shown in FIG.

As described above, when the first light L1 of a single wavelength emitted from the laser diode 210 is irradiated to a predetermined region of the phosphor W, the phosphor W is excited by the first light L1, (L2). Here, the second light L2 emitted from the phosphor W may have a longer wavelength than the first light L1 emitted from the laser diode 210.

The second light L2 emitted from the phosphor W is incident on the objective lens 240 and the second light L2 travels toward the beam splitter 230 through the objective lens. The beam splitter 230 transmits the first light L1 emitted from the laser diode 210 and transmits the second light L2 emitted from the phosphor W as a dichroic It can be a mirror. Accordingly, the second light L2 emitted through the objective lens 240 can be reflected by the beam splitter 230 and can be received by the camera 270.

A filter 250 may be further provided on the optical path between the beam splitter 230 and the camera 270 to selectively transmit only the second light L2. An imaging lens 260 for forming an image of the phosphor W on the camera 270 using the second light L2 passing through the filter 250 is provided between the filter 250 and the camera 270 .

The first light L1 of a single wavelength emitted from the laser diode 210 is converged through the converging lens 220 and is incident on the beam splitter 230 in the image acquisition apparatus 200 of the phosphor as described above, The splitter 230 transmits the first light L1 and enters the objective lens 240 side. The objective lens 240 defocuses incident first light L1 at a position farther than the focal distance and irradiates the phosphor W. The phosphor W is excited by the first light L1, And emits the second light L2 having a shorter wavelength than the first light L1. The second light L2 emitted from the phosphor W is incident on the beam splitter 230 via the objective lens 240. The beam splitter 230 reflects the second light L2 to form a filter 250 to the imaging lens 260. The image of the phosphor W is imaged on the camera 270 by using the second light L2 incident on the imaging lens 260 so that the camera 270 can obtain the image of the phosphor.

Also in this embodiment, as in the embodiment described above, a laser diode 210 that emits light of a single wavelength is used as an illumination light source for exciting the phosphor W. Accordingly, since a high-power laser beam can be used as the illumination light, the brightness of the illumination is increased and the lifetime of the illumination light source can be greatly increased. Since the laser diode 210 emits light of a single wavelength, it is not necessary to use an excitation filter for obtaining light of a specific wavelength.

4A is a photograph of a phosphor having a Cu pattern formed thereon using a general camera. FIG. 4B is a photograph of the phosphor having the Cu pattern shown in FIG. 4A taken by using the image capturing device of the phosphor according to the present invention.

Referring to FIG. 4A, it can be seen that it is difficult to clearly distinguish the phosphor from the Cu pattern if a general camera is used because the phosphor is transparent. However, as shown in FIG. 4B, when a white part is used as a phosphor and a black part is used as a Cu pattern, an image of a phosphor can be obtained by using the apparatus for capturing a phosphor according to the present invention . Therefore, by using the image capturing device for a phosphor according to the present invention, it is possible to clearly distinguish the phosphor from the Cu pattern. Accordingly, only the Cu pattern is irradiated with laser to perform a processing operation, and the material under the phosphor is processed Can be prevented.

While the invention has been shown and described with reference to certain preferred embodiments thereof, it will be understood by those skilled in the art that various changes and modifications may be made without departing from the scope of the invention as defined by the appended claims.

100, 200 .. Image acquisition device of phosphor
110, 210. Laser diode
120, 200 .. converging lens
130, 230 .. beam splitter
140, 240. The objective lens
150, 250 .. filter
160, 260 .. Imaging Lens
170, 270 .. camera
L1 .. First light
L2 .. Second light
W .. Phosphor

Claims (11)

A laser diode for emitting a first light as illumination light;
An objective lens for irradiating the phosphor with the first light emitted from the laser diode; And
And a camera for receiving the second light emitted from the phosphor excited by the first light to acquire an image of the phosphor,
Wherein the objective lens defocuses the first light emitted from the laser diode on the phosphor and irradiates the light to a larger area than a field of view of the camera. The method according to claim 1,
Wherein the first light comprises a single wavelength of light shorter than the wavelength of the second light. delete The method according to claim 1,
And the second light excited by the first light and emitted from the phosphor is received by the camera through the objective lens. 5. The method of claim 4,
Further comprising a beam splitter for causing the first light emitted from the laser diode to enter the objective lens and causing the second light emitted from the objective lens to enter the camera, Image acquisition device. 6. The method of claim 5,
The beam splitter includes a dichroic mirror for reflecting the first light emitted from the laser diode toward the objective lens and transmitting the second light emitted from the phosphor to the camera, And an image acquiring device for acquiring the image of the phosphor. 6. The method of claim 5,
The beam splitter includes a dichroic mirror that transmits the first light emitted from the laser diode toward the objective lens and reflects the second light emitted from the objective lens to the camera, . 6. The method of claim 5,
And a convergent lens is provided between the laser diode and the beam splitter to converge the first light emitted from the laser diode and to enter the beam splitter. 6. The method of claim 5,
And a filter for transmitting only the second light is provided between the beam splitter and the camera. 10. The method of claim 9,
And an imaging lens is provided between the filter and the camera to image an image of the phosphor on the camera using the second light transmitted through the filter. The method according to claim 1,
Wherein the phosphor comprises a Photo Imageable Dielectric (PID).
KR1020170020115A 2017-02-14 2017-02-14 Apparatus for obtaining image of fluorescent substance KR101874388B1 (en)

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Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP2005331887A (en) 2004-05-21 2005-12-02 Keyence Corp Fluorescence microscope, display method using fluorescence microscope, fluorescence microscopic image display program, and computer readable recording medium and storage equipment
KR100737170B1 (en) * 2006-01-20 2007-07-10 경북대학교 산학협력단 Portable quantum dot flurescent detector
JP4987737B2 (en) * 2005-03-03 2012-07-25 サントル、ナショナール、ド、ラ、ルシェルシュ、シアンティフィク、（セーエヌエルエス） Fluorescence detection device

Patent Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP2005331887A (en) 2004-05-21 2005-12-02 Keyence Corp Fluorescence microscope, display method using fluorescence microscope, fluorescence microscopic image display program, and computer readable recording medium and storage equipment
JP4987737B2 (en) * 2005-03-03 2012-07-25 サントル、ナショナール、ド、ラ、ルシェルシュ、シアンティフィク、（セーエヌエルエス） Fluorescence detection device
KR100737170B1 (en) * 2006-01-20 2007-07-10 경북대학교 산학협력단 Portable quantum dot flurescent detector

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