KR101535658B1 - The light intensity measuring device having optical fiber - Google Patents

Abstract

A light intensity measuring device having optical fibers according to an embodiment of the present invention comprises: a plurality of sockets having protrusions formed on upper ends thereof to prevent light emitted from a plurality of light emitting elements from escaping to the outside; a plurality of first optical fibers to penetrate the sockets in a vertical direction and receive the light emitted from the light emitting elements; second optical fibers to receive the light received by the first optical fibers; a connection unit to connect the first optical fibers and the second optical fibers; a sensor unit to measure intensities of the light received through the second optical fibers; a control unit to control operation of the sensor unit; and a calculation unit to calculate an average of a plurality of intensities of the light measured in the light emitting elements after excluding the largest and the smallest intensity.

Description

TECHNICAL FIELD [0001] The present invention relates to a light intensity measuring device having an optical fiber,

BACKGROUND OF THE INVENTION 1. Field of the Invention [0002] The present invention relates to a light quantity measuring apparatus having an optical fiber, and more particularly, to a light quantity measuring apparatus capable of measuring a more accurate light quantity except a light quantity exceeding or less than a certain rate of an average light quantity.

Generally, a light emitting device is a light emitting diode (LED), and a light emitting device is a semiconductor device that emits light in response to an applied current. The LED is very small in size compared to a bulb, consumes less power, and has a long life span.

On the other hand, when a plurality of light emitting elements such as a light emitting panel or a keypad are used instead of the individual elements, the light amount of the light emitting elements measured due to the light amounts of adjacent light emitting elements is difficult to be accurately measured.

Also, if the plurality of light emitting devices are sequentially inspected one by one in order not to be influenced by the light quantity of the adjacent light emitting devices, there is a problem that the inspection takes a long time.

In order to solve the above problems, Korean Patent Registration No. 10-0768884 discloses a light emitting device inspection apparatus for a substrate, which comprises a main body having a sample mounting base on which a substrate is placed, a press provided on the main body, A sensor mounting base which is fastened to the press with a plate-shaped member having a closed end and is vertically conveyed by a press from above corresponding to the position of the sample mounting base, And a plurality of light receiving sensors for receiving the plurality of light receiving sensors.

However, the above-described conventional technique can close the space between the sample mounting base and the base with the sensor to block the ambient light. However, there is a problem that closely related light emitting devices affect the light quantity measured. However, there is a problem in that it is difficult to obtain an accurate light quantity of each of a plurality of light emitting devices.

In addition, since the light receiving sensor is fixed at a predetermined position without connecting parts, only the light emitting elements fixed at the same position should always be inspected. If the arrangement of the light emitting elements is changed, There is a problem in that a new sensing structure of the inspection apparatus must be newly manufactured.

Korean Patent Registration No. 10-0768884

An object of the present invention is to provide a light quantity measuring apparatus capable of measuring a more accurate light quantity by excluding a light quantity exceeding or less than a predetermined ratio of the average light quantity.

It is another object of the present invention to provide a light quantity measuring apparatus having an optical fiber for accurately measuring the light quantity of each of a plurality of light emitting devices.

It is another object of the present invention to provide a light quantity measuring apparatus having an optical fiber capable of flexibly changing the arrangement of sockets according to a plurality of light emitting devices arranged at various positions.

It is another object of the present invention to provide a light quantity measuring apparatus having an optical fiber capable of providing a light quantity measuring apparatus which is provided with a detachable connecting portion and adapted to various light emitting devices.

It is another object of the present invention to provide a light amount measuring apparatus including an optical fiber capable of accurately measuring the respective light amounts of a plurality of closely spaced light emitting devices.

According to an aspect of the present invention, there is provided an apparatus for measuring an amount of light having an optical fiber, the apparatus comprising: a plurality of sockets having protrusions at an upper end thereof and blocking light emitted from a plurality of light emitting devices, A plurality of first optical fibers passing through the socket in a vertical direction and receiving light emitted from the light emitting device; A second optical fiber receiving light received from the first optical fiber; A coupling part for coupling the first optical fiber and the second optical fiber; A sensor unit for measuring an amount of light received through the second optical fiber; A control unit for controlling the operation of the sensor unit; And an operation unit for calculating an average of a plurality of light amounts measured in the plurality of light emitting devices excluding a largest value and a small value.

Further, the calculating unit may determine that the light emitting device having a ratio exceeding or less than a predetermined ratio of the average light amount is defective.

Further, the socket further includes a lens fixture.

In addition, the socket may further include a lens coupling step for fitting a condenser lens at an inner lower end thereof.

The protrusion may include a plurality of screw holes for fixing the socket to a predetermined position.

Further, the projecting portion is characterized in that it has a shape having two sides parallel to the outer circumferential surface of the socket so as to be in close contact with another socket.

The connection unit may include a first connection unit to which the first optical fiber is coupled and a second connection unit to which the second optical fiber is coupled, and the first connection unit and the second connection unit may be removable.

As described above, according to the apparatus for measuring the amount of light having the optical fiber according to the present invention, it is possible to measure a more accurate average amount of light by excluding the amount of light exceeding or less than a predetermined ratio of the average amount of light.

In addition, according to the apparatus for measuring the amount of light having the optical fiber according to the present invention, the light quantity of each of the plurality of light emitting devices can be accurately measured.

In addition, according to the apparatus for measuring the quantity of light having the optical fiber according to the present invention, the arrangement of the sockets can be flexibly changed according to a plurality of light emitting devices arranged at various positions.

In addition, according to the apparatus for measuring the quantity of light having the optical fiber according to the present invention, it is possible to provide a detachable connection part, thereby providing a light quantity measuring device aligned with various types of light emitting devices.

In addition, according to the apparatus for measuring the amount of light having the optical fiber according to the present invention, it is possible to measure each light quantity of a plurality of closely spaced light emitting devices.

BRIEF DESCRIPTION OF THE DRAWINGS FIG. 1 is a schematic view showing a configuration of a light amount measuring apparatus having an optical fiber according to the present invention; FIG.
2 is a front view and a side view of a socket of a light amount measuring apparatus having an optical fiber according to the present invention.
3 is a perspective view and a top view of a socket of a light amount measuring apparatus having an optical fiber according to the present invention.
FIG. 4 is a schematic view showing a light amount measurement front end of a light amount measuring apparatus having an optical fiber according to the present invention. FIG.
FIG. 5 is a view schematically showing a fastening state of a connecting portion of a light amount measuring apparatus having an optical fiber according to the present invention. FIG.
FIG. 6 is a conceptual diagram showing a state in which light emitted from light emitting elements at different positions is condensed through a condensing lens in an apparatus for measuring light quantity with an optical fiber according to the present invention. FIG.

Specific features and advantages of the present invention will be described in detail below with reference to the accompanying drawings. The detailed description of the functions and configurations of the present invention will be omitted if it is determined that the gist of the present invention may be unnecessarily blurred.

BACKGROUND OF THE INVENTION 1. Field of the Invention [0002] The present invention relates to a light quantity measuring apparatus having an optical fiber, and more particularly, to a light quantity measuring apparatus having an optical fiber for fluidly measuring the light quantity of a plurality of light emitting devices having various arrangements.

Hereinafter, preferred embodiments of the present invention will be described in detail with reference to the accompanying drawings.

2 is a front view and a side view of a socket of a light quantity measuring apparatus having an optical fiber according to the present invention, and FIG. 3 is a cross- 4 is a schematic view showing a light amount measuring tip of a light amount measuring apparatus having an optical fiber according to the present invention, and FIG. 5 is a schematic view showing a light amount measuring tip of the light amount measuring apparatus according to the present invention. FIG. 6 is a schematic view illustrating a connection state of a connecting portion of a light amount measuring apparatus having an optical fiber according to the present invention. FIG. 6 is a cross-sectional view of a light amount measuring apparatus having an optical fiber according to the present invention, And the light is condensed through the condenser lens.

As shown in FIG. 1, a light amount measuring apparatus including an optical fiber according to the present invention includes a plurality of sockets 100 (not shown) having protrusions at an upper end thereof and intercepting light emitted from a plurality of light emitting devices 1, A plurality of first optical fibers 200 passing through the socket in a vertical direction and receiving light emitted from the light emitting device 1 and a second optical fiber 300 receiving light received from the first optical fiber 300 A sensor unit 500 for measuring the amount of light received through the second optical fiber; a control unit 600 for controlling the operation of the sensor unit; .

The socket 100 has a protrusion for fixing the position of the socket at the top, and the light emitting device 1 is located in the inner space to block light that can be introduced from the outside, and light emitted from the plurality of light emitting devices 1 A plurality of light emitting diodes (not shown) are provided to block the light from the first optical fiber to be described later so that light emitted from the light emitting device 1 can be received.

The detailed structure of the socket 100 will be described in more detail with reference to FIG.

The first optical fiber 200 passes through the socket in a vertical direction and collects light emitted from the light emitting device 1. [

The first optical fiber 200 includes one optical fiber per one socket and can transmit light of the light emitting device collected through each socket without loss.

The optical fiber is an optical fiber in which a high refractive index glass is used in the center portion and a low refractive index glass is used in the outer portion and the light passing through the glass in the center portion is totally reflected.

In addition, since the optical fiber has very little loss in the process of total reflection of light and is hardly influenced by the external environment, the amount of light emitted from the light emitting device can be accurately measured.

Also, since the material required for the process of fabricating the optical fiber is very cheap, the utilization rate is high.

The second optical fiber 300 can receive light received from the first optical fiber, and the first optical fiber and the second optical fiber can be coupled through the connection part 400.

The connecting portion 400 of the optical fiber measuring apparatus according to the present invention includes a first connecting portion 410 (see FIG. 5) to which the first optical fiber 200 is coupled, and a second connecting portion 420 (See FIG. 5, 420), and the first connection part 410 and the second connection part 420 may be removable.

The plurality of light emitting devices 1 may be variously used depending on the use purpose and the necessity. In order to measure the amount of divergent light of the first light emitting element group and the second light emitting element group in which a plurality of light emitting elements are located at different positions from a plurality of light emitting elements included in the first light emitting element group and the second light emitting element group The light amount measuring device must be readjusted to match the position of each light emitting element for each measurement.

However, if the socket 100, the first optical fiber 200, and the first connection portion (FIGS. 5 and 410) are formed in advance for each position of the plurality of light emitting elements of the first light emitting element group, The first optical fiber and the first connection unit may be connected to the second connection unit.

The other light emitting element group may also include a socket matching the position of each light emitting element, a first optical fiber and a first connector for transmitting the amount of light collected from each socket, and when measuring the light quantity of the light emitting element group, Conclude.

Accordingly, when measuring the light amount of the plurality of light emitting element groups, the first connecting portion and the second connecting portion, which are conventionally fastened to each other, are separated and the first connecting portion corresponding to the corresponding light emitting element group is fastened to the second connecting portion, A measurement can be made.

The sensor unit 500 measures the amount of light received through the second optical fiber 300 and includes one second optical fiber 300 per one light emitting device 1 so that a plurality of the sensor units 500 are included .

Since the sensor unit 500 measures the amount of light collected by the plurality of light emitting devices 1, the accurate light amount of each of the plurality of light emitting devices 1 can be reliably measured.

The control unit 600 may control the ON / OFF operation of the sensor unit 500 so that when the first connection unit 410 (see FIG. 5) and the second connection unit 420 (see FIG. 5) The operation of the sensor unit 500 can be stopped.

Also, the controller 600 may control the display unit included in the light amount measuring apparatus according to the present invention to display the current state of the light amount measuring apparatus, and may display the light amount measured by the sensor unit 500 as a numerical value or a graph , Tables, pictures, and the like.

Further, the apparatus for measuring the light amount with the optical fiber according to the present invention may further include an operation unit (see FIG. 5) 700 for calculating an average excluding a maximum value and a small value among a plurality of light amounts measured in the plurality of light emitting devices .

Further, the calculating unit (see FIG. 5, 700) of the light amount measuring apparatus having the optical fiber according to the present invention can judge that the light emitting element having a certain ratio of the average light amount, for example, exceeding 10% or less, is defective.

The amount of light emitted from the plurality of light emitting elements may generally be in accordance with the average light amount. In addition, since the light emitting device largely deviating from the average light amount has a high probability of failure, the light emitting device that emits the largest amount of light and the light emitting device that emits the smallest amount of light after calculating the average excluding the largest light amount and the smallest light amount It is possible to compare each light quantity of the entire luminous means with the calculated average operation.

For example, in a light emitting element group having light quantities of 20, 70, 80, 90, and 110, the total average is 74, but a light emitting element having a light quantity of 20 and 110 is highly likely to be defective. Therefore, the average light quantity 80 can be obtained by calculating the total average except for the light quantity 20, 110. As a result, the effective light amount range is changed from 74 ± 10% to 80 ± 10%, and the defective light emitting device can be more efficiently distinguished.

2, the socket 100 may have a protrusion 110 at its upper end, and a region including a light emitting device 1 represented by a round square in the drawing may be formed at the lower end of the socket 100 .

The protrusion 110 may be formed to fix the position of the socket 100 to the position of each light emitting element 1. [ The light emitting element 1 may be two-dimensionally arranged on the plate as shown in the lower left of FIG. The light emitting device 1 may be disposed at various positions as required.

In addition, the protrusion 110 of the light amount measuring apparatus having the optical fiber according to the present invention may include a plurality of screw coupling holes 111 for fixing the socket 100 to a predetermined position.

The protrusion 110 of the apparatus for measuring the quantity of light of the optical fiber according to the present invention may be in the form of having two parallel sides (refer to FIG. 3) contacting the outer circumferential surface of the socket so as to be in close contact with another socket 100 have.

Since the plurality of sockets 100 are arranged according to the respective positions of the plurality of light emitting devices 1, if the light emitting devices 1 are positioned closely to each other, the sockets 100 must be closely located. At this time, if the protrusion 110 occupies a large area, the socket 100 can not be positioned close to each other.

Therefore, at least two sides of the protrusion 110 may be formed close to the outer circumferential surface of the socket.

2, the protruding portion 110 is formed to be wider than the outer circumferential surface of the socket, and a screw coupling hole 111 is formed. 2 is a side view in which the protrusion 110 is formed closely to the outer circumferential surface of the socket, and the protrusion 110 is similar to the width of the socket and can be positioned closely to another socket 100.

The shape of the protrusion 110 may be variously formed as needed, such as a rectangle, a round square, a parallelogram, an ellipse, or the like.

Also, the protrusion 110 may be formed with an optical fiber coupler 140 through which the first optical fiber passes.

The first optical fiber passes through the optical fiber coupler 140 to a region including the light emitting device 1 under the socket 100.

In addition, the socket 100 of the light quantity measuring apparatus having the optical fiber according to the present invention may further include a lens fixture 120. The lens fixture 120 may be formed to fix the condenser lens 150 that corrects the position error of the light emitting device and transmits the divergent light to the first optical fiber.

Or the condenser lens 150 may be fixed to the bottom of the socket 100 so that the lens may be fitted into the concave or convex shape or the stepped portion.

Or a screw groove is formed on the outer peripheral surface of the condenser lens 150 and a screw groove is formed in the lower end of the socket 100 so that the condenser lens 150 can be screwed into the socket 100. [

Or a coupling body in which a screw groove is formed on an outer circumferential surface to surround the condenser lens 150, and the coupling body may be screwed to a socket 100 having a screw groove formed therein.

Among the kinds of the light emitting element 1, light emitted from the LED (light emitting diode) has a strong directivity. Therefore, even if the position of the LED is slightly deviated from the position of the end portion of the first optical fiber, the light amount of the LED may not be measured properly.

2, the condenser lens 150 may be fixed to the upper end of the light emitting device 1 by a lens fixing device 160 and may correct the position error of the light emitting device 1, To the first optical fiber.

The details of the light amount measurement error correction according to the position of the LED among the light emitting elements will be described in more detail with reference to FIG.

The light emitted from the light emitting element 1 can not escape to the outside due to the socket 100 and external light does not affect the light amount of the light emitting element 1.

Further, the socket 100 of the light quantity measuring apparatus having a light receiving socket capable of changing positions according to the present invention is characterized in that a condenser lens is fitted in the lower end of the socket 100, and light emitted from the light emitting element 1 is condensed at the end of the first optical fiber And a lens coupling step 130 for forming a space to be formed by the lens coupling step.

Also, the condenser lens 150 should be positioned so as not to be excessively close to the end portion of the first optical fiber by the lens coupling step 130. When the first optical fiber and the condenser lens 150 are in close contact with each other, the light emitted from the light emitting device 1 may not be condensed at the end portion of the first optical fiber, so that the condenser lens 150 and the distal end of the first optical fiber It should be positioned so as to be spaced by a predetermined distance.

3, the protrusions 110 may be in the form of two parallel sides 112 that abut the outer circumferential surface of the socket so as to be in close contact with another socket 100. [

Also, the protrusion 110 may form an optical fiber coupler 140 for penetrating the first optical fiber to a portion where the lens coupling step 130 is formed. In order to fix the socket 100 to a predetermined position One or more screw engagement holes 111 may be formed.

3 is a top plan view of the socket 100, and the protrusion 110 has two parallel sides 112 that abut the outer surface of the socket.

Therefore, as shown in the bottom right of FIG. 3, the socket 100 can be positioned closely to each other.

4, the socket 100 is positioned in correspondence with the position of the light emitting device 1, and the first optical fiber 200 penetrates the socket 100 to receive light emitted from the light emitting device 1, ≪ / RTI > The first optical fiber is fastened to the connection part 400.

5, the connection unit 400 includes a first connection unit 410 to which the first optical fiber 200 is coupled and a second connection unit 420 to which the second optical fiber 300 is coupled And the first connection part 410 and the second connection part 420 may be detachable.

5, the light amount measuring tip A includes three sockets 100, and the light quantity measuring tip A in the lower portion of FIG. 5 includes two sockets 100. In FIG.

The light amount measuring apparatus according to the present invention includes only a single light amount measuring end portion B including a plurality of second optical fibers 300 and a plurality of light amount measuring end portions A aligned with the light emitting elements arranged in various ways It can be used in place of the light amount measurement tip portion A having the socket 100 at a required position.

The light amount measuring apparatus according to the present invention will generally measure the amount of light of an LED (light emitting diode) among light emitting devices. The light emitted from LEDs has a stronger directivity than a tendency to spread in all directions.

As shown in the upper part of FIG. 6, even if the position of the LED slightly deviates from the position where the end portion of the first optical fiber 200 indicated by the dotted line faces a straight line, the light amount of the LED may not be measured properly.

As shown in the lower part of FIG. 6, the light emitted from the light emitting device 1 at different positions can be condensed at a point A through the condenser lens 150. Since the light emitted from the LEDs of the light emitting devices is strong in straightness, the light emitted from the light emitting device 1 at different positions is vertically incident on the condensing lens 150 and refracted to be condensed at one point A.

If the end portion of the first optical fiber 200 is fixed to the point A described above, even if the light emitting element 1 deviates from a position where the distal end portion of the first optical fiber 200 is in a straight line, 1 can be condensed at the distal end portion of the first optical fiber 200. FIG.

Accordingly, it is possible to provide a light quantity measuring device having a high reliability of light quantity measurement by collecting the light quantity by correcting the position of the light emitting device 1.

As described above, according to the apparatus for measuring the amount of light having the optical fiber according to the present invention, it is possible to accurately measure the light quantity of each of the plurality of light emitting devices and to change the arrangement of the sockets in accordance with a plurality of light emitting devices arranged at various positions It is possible to provide a light quantity measuring device that is suitable for various types of light emitting devices and can provide an effect of measuring the light quantity of a plurality of closely spaced light emitting devices.

While the present invention has been particularly shown and described with reference to exemplary embodiments thereof, it is clearly understood that the same is by way of illustration and example only and is not to be taken as a limitation of the scope of the present invention. Or modify it. The scope of the invention should, therefore, be construed in light of the claims set forth to cover many of such variations.

1: light emitting device 100: socket
110: protrusion 111:
112: parallel two sides 120: lens fastener
130: lens coupling step 140: optical fiber coupling port
150: condenser lens 160: lens retainer
200: first optical fiber 300: second optical fiber
400: connection part 410: first optical fiber
420: second optical fiber 500: sensor part
600: control unit 700:

Claims (7)

A plurality of sockets having protrusions at the top and blocking light emitted from the plurality of light emitting devices from escaping to the outside;
A plurality of first optical fibers each passing through the plurality of sockets and receiving light emitted from each of the plurality of light emitting devices, respectively;
A plurality of second optical fibers each receiving light received from the first optical fiber;
A coupling part for coupling the first optical fiber and the second optical fiber;
A sensor unit for measuring an amount of light received through the second optical fiber;
A control unit for controlling the operation of the sensor unit; And
And an arithmetic unit operable to calculate an average of a plurality of light quantities measured by the plurality of light emitting devices excluding a largest value and a small value,
In each of the plurality of sockets, only one light emitting element is included in each socket
The operation unit determines that the light emitting element that is in excess of or below a certain ratio of the average light amount is defective
The connection unit may include a first connection unit to which the first optical fiber is coupled and a second connection unit to which the second optical fiber is coupled, and the first connection unit and the second connection unit may be removable
Wherein the plurality of first optical fibers penetrate the plurality of sockets in a vertical direction.
delete The method according to claim 1,
Wherein the socket further comprises a lens fixture. ≪ RTI ID = 0.0 > 11. < / RTI >
The method of claim 3,
Wherein the socket further comprises a lens coupling step for fitting a condenser lens at an inner lower end thereof.
The method according to claim 1,
Wherein the projecting portion includes a plurality of threaded portions for fixing the socket to a predetermined position.
The method according to claim 1,
Wherein the projecting portion has a shape having two sides parallel to the outer circumferential surface of the socket so as to be in close contact with another socket.
delete

Images