KR20180132189A - A Optical Probe for Measuring a Emitting Property - Google Patents

Abstract

The present invention relates to an optical probe for measuring light emitting properties, and more particularly, to an optical probe for measuring light emitting properties, capable of measuring various light emitting properties of an LED element, a screen of an electronic device, or a similar light emitting element or device. The optical probe includes: a frame module (11) formed therein with a reception space; an object module (12) protruding in a cylinder shape from a front surface of the frame module (11); a first reflection module (15) for reflecting light incident from the object module (12) into the frame module (11) while partially allowing the light to be transmitted through a transmission hole (aperture); a second reflection module (16) for guiding the light reflected by the first reflection module (15) in a predetermined direction; a camera module (17) for detecting an image of the transmission hole from the light guided from the second reflection module (16); and a light detection guide (13) for guiding the light transmitted through the transmission hole (aperture).

Description

[0001] The present invention relates to an optical probe for measuring light emission characteristics,

The present invention relates to an optical probe for measurement of luminescence characteristics, and more particularly to an optical probe for measuring luminescence characteristics capable of measuring various luminescence characteristics of an LED element, a screen of an electronic device, a similar light emitting element or a light emitting device.

Various types of light emitting devices or light emitting display means for generating light are known in the art, such as, for example, LED devices, displays of portable electronic devices, TVs or screens of computers. Since the luminescent characteristics of such a device or display means are the main factors that determine the performance of the product, they need to be measured in advance.

Patent Publication No. 10-2008-0051599 discloses a liquid crystal panel optical system capable of precisely measuring the optical characteristics of a liquid crystal panel by precisely aligning the liquid crystal panel and the polarizing plate, A characteristic measuring apparatus is disclosed. In addition, Japanese Patent Application Laid-Open No. 10-2013-0004517 discloses a measuring optical system for measuring the luminance or chromaticity of a light source from light emitted from a light source such as a liquid crystal monitor or a lamp or for measuring a reflectance or chromaticity from light reflected by the object, Device.

The measuring optical apparatus disclosed in the prior art is structurally complicated, and as a result, the size of the entire apparatus becomes large, and the measurement process is complicated. This has the disadvantage that it is difficult to measure the optical characteristics of a display of, for example, a portable small electronic apparatus. In addition, it has a disadvantage that it is difficult to detect various optical characteristics simply. Therefore, it is necessary to develop a measurement optical device which is simple in measurement while being made compact and capable of analyzing various optical characteristics at the same time.

The present invention has been made to solve the problems of the prior art and has the following purpose.

Prior Art 1: Patent Publication No. 10-2008-0051599 (published by LG Display Co., Ltd., June 11, 2008) Optical characteristic measurement device of liquid crystal panel Prior Art 2: Patent Publication No. 10-2013-0004517 (Konica Minolta Optics, Inc., published Jan. 10, 2013) Optical system for measurement and colorimetric system and colorimetric system using the same

The present invention provides an optical probe for measurement of light emission characteristics, which has a small size and a simple measurement process, and at the same time enables various optical characteristics to be measured precisely.

According to a preferred embodiment of the present invention, an optical probe for measuring a light emission characteristic comprises: a frame module having a receiving space formed therein; An object module protruding in a cylinder shape from a front surface of the frame module; A one-reflection module for reflecting light incident from the object module into the interior of the frame module while allowing a part thereof to be transmitted through a transmission hole; A two-reflection module for guiding reflected light from the one reflection module in a predetermined direction; A camera module for detecting an image of the transmission hole from the light derived from the 2 reflection module; And a light detection guide for guiding the light transmitted through the transmission hole.

According to another preferred embodiment of the present invention, at least one lens is disposed inside the object module.

According to another preferred embodiment of the present invention, the one reflection module includes a planar interchangeable mirror surface arranged in an inclined form, and a transmission hole is formed at the center of the mirror surface.

According to another preferred embodiment of the present invention, a connection port formed in the frame module is further included.

The optical probe according to the present invention is advantageous in that it can be applied to various light emitting devices or light emitting means while being small in size and simple in measuring process. The optical probe according to the present invention enables measurement of light emission characteristics at various positions and enables analysis of various optical characteristics. For example, an optical probe according to the present invention allows measurement of luminance, radiance, chromaticity, or similar optical characteristics. In addition, the optical probe according to the present invention enables optical characteristics to be precisely measured at various distances and angles with respect to the light source.

1A and 1B show an embodiment of an optical probe for measurement of luminescence characteristics according to the present invention.
2 shows an embodiment of a camera module applied to an optical probe according to the present invention.

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS Hereinafter, the present invention will be described in detail with reference to the embodiments shown in the accompanying drawings, but the present invention is not limited thereto. In the following description, components having the same reference numerals in different drawings have similar functions, so that they will not be described repeatedly unless necessary for an understanding of the invention, and the known components will be briefly described or omitted. However, It should not be understood as being excluded from the embodiment of Fig.

Figs. 1A and 1B show an embodiment of an optical probe for measurement of luminescence characteristics according to the present invention.

1A and 1B, an optical probe for measurement of luminescence characteristics comprises a frame module 11 having a receiving space formed therein; An object module 12 protruding in a cylinder shape from a front surface of the frame module 11; A one-reflection module (15) for reflecting light incident from the object module (12) into the interior of the frame module (11) while partially transmitting the light through a transmission hole; A two-reflection module (16) for guiding the light reflected by the one reflection module (15) in a predetermined direction; A camera module (17) for detecting an image of a measurement object including a transmission hole from the light derived from the 2 reflection module (16); And a light detection guide 13 for guiding light transmitted through the transmission hole.

The frame module 11 may be formed in a closed structure in which a receiving space is formed, and may be in a box shape of a closed structure to prevent light from being leaked to the outside. A light emitting device to be measured or a light emitting screen such as a smart phone may be positioned in front of the front cover 111 of the frame module 11. [ For example, a light source having a diameter of 0.1 to 20 mm positioned at a distance of 100 to 200 mm can be measured, and the light source can be a part of a light emitting device or a touch screen of a portable electronic device. Light emitted from a measurement object that is a light source may be incident on the object module 12. [

The object module 12 can be made into a cylinder structure in which light can be straightened while being entirely cylindrical. The object module 12 may be formed in a shape protruding from a front cover 111 of a rectangular substrate shape, and at least one lens may be disposed therein. The light incident on the object module 12 may be reflected by the one reflection module 15 and may enter the camera module 17 and some may pass through the transmission hole formed in the one reflection module 15, Can be introduced into the detection guide 13.

The one reflection module 15 disposed inside the frame module 11 may have a reflective mirror surface and the reflective mirror surface may be arranged in the direction of the light detection guide 13 in the range of from 1 to 20 degrees, As shown in FIG. The light incident into the object module 12 can be reflected by the mirror surface of the one reflection module 15 and a part of the light incident on the mirror surface flows into the transmission hole formed on the mirror surface, . For example, when the circular light source is located 50 to 200 mm, preferably 100 to 180 mm from the front side of the object module 12, the diameter of the light source to be measured is 0.1 to 20.0 mm, The through hole may have a circular or elliptical shape and may have a diameter of 0.1 탆 to 4.0 탆. The light introduced into the transmission hole may be detected by the light detection guide 13 through an inductive means such as an optical fiber and transmitted to a measuring instrument such as a spectroscope via a transmission cable unit 14 composed of an optical fiber. And the light incident on the mirror surface of the 1-reflection module 15 may be guided to the 2-reflection module 16. The transmission cable unit 14 may be detachably coupled to the light detection guide 13, and a plurality of optical fibers may be disposed therein. And a plurality of optical fibers can be protected by a spiral protective coating. A different light detection guide 13 or transmission cable unit 14 may be coupled to the one reflection module 15 depending on the light source or the object to be measured and the light detection guide 13 may have a linear, Can be made in various structures.

The mirror surface of the one reflection module 15 is shaped to be inclined, for example, by 5 to 45 degrees, whereby the reflected light is directed downward toward the front cover 111. And the 2-reflection module 16 may be positioned on the inner side of the front cover 11 and below the object module 12. 2 reflection module 16 may have a function of guiding the reflected light of the one reflection module 15 to the camera module 17. [ 2 reflection module 16 may have an angle-adjustable mirror-guiding surface, and the light reflected and guided from the mirror-guiding surface may enter the camera module 17.

The camera module 17 may be, for example, a view finder camera or a CMOS camera, and an image of the measurement unit including the transmission hole may be obtained by the camera module 17. [ Visible characteristic of the light source is detected based on the image obtained by the camera module 17, and the direction or distance of the light source can be appropriately adjusted.

The light introduced into the transmission hole can be guided to the light detection guide 13 via the induction module 18 and the light detection guide 13 can be coupled to the frame module 11 by the engagement bracket. The light detection guide 13 may be formed of an optical fiber cable and may have a function of guiding the light introduced into the guide module 18 to the light detection guide 13. [ The light detection guide 13 may include at least one strand of optical fiber and may detect and transmit light guided by the inductive module 18. The light detected in the light detection guide 13 may be directed through a transmission unit such as an optical fiber disposed in the transmission cable unit 14 to a meter, for example a spectrometer. And the spectroscopic characteristics of the light source generated in the measurement object can be analyzed in the instrument.

A control module 19 may be disposed inside the frame module 11 and a connection port for data communication with the control module 19 may be formed in the frame module 11. [ The connection port may be, for example, a USB port, and a control device, such as a computer, may be connected to the control module 19 by a connection port. For example, the image data obtained from the camera module 17 may be transmitted to the control device via the connection port to be displayed. Then, the transmitted image data is analyzed to adjust the direction, distance, or position of the light source. In addition, a PCB module that processes detected data from a light sensor installed in the camera module can be transferred to a computer through a connection port such as a USB port. And can be graphically processed in the computer and displayed on the display unit. For example, an image of the measurement object and the transmission hole obtained by the camera module 17 can be displayed and analyzed on the display unit.

Various connection ports may be formed for data communication between the control module 19 disposed inside the frame module 11 and the control device disposed externally, and the present invention is not limited to the illustrated embodiment.

The optical probe according to the present invention can be connected to various types of spectroscopes or similar optical analyzers when made compact. For example, the frame module 11 may have a box shape of 50 to 80 x 55 to 70 x 15 to 40 mm or 65 x 63 x 30 mm, and the object module 12 may have a diameter of 15 to 30 mm The length may be 18 to 25 mm, but is not limited thereto. The first and second reflection modules 15 and 16, the camera module 17, and the guide module 18 can be accommodated in the frame module 11. In addition, a photodetecting guide 13 of a different standard can be coupled to the frame module 11, for example, a linear or bent light detection guide 13 can be coupled to the frame module 11. [ The light detection guide 13 may be coupled to the frame module 11 with a light detection guide 13 having, for example, 106.2 x 63 x 54 mm, 106.2 x 74.5 x 30 mm, or the like. The camera module 17 may be a f12 and a 1/4 inch COMS camera, or a viewfinder camera with an FOV of 15 to 20 mm and 12 to 15 mm, respectively. As the optical probe is made small in size, the handling is simple and the connection and separation with various electronic devices or spectroscopic devices are made simple. At the same time, the module for measurement is made precise so that the measurement accuracy is enhanced.

2 shows an embodiment of a camera module applied to an optical probe according to the present invention.

Referring to FIG. 2, the camera module 17 includes a lens holder 172 having a fixed structure with at least one lens disposed therein, and having a length adjustable therein; And a camera bracket 171 to which the camera is fixed. The lens holder 172 may have a multistage structure, but may have various shapes without being limited thereto. The image of the measurement object including the transmission hole can be acquired by the camera module 17 and the acquired image can be processed in the control module and transmitted to the outside through the connection port and displayed. The camera fixed to the camera bracket 171 may be, for example, a camera of a distance meter interlock system, but not limited thereto, and may be, for example, a CMOS camera. The present invention is not limited thereto, and can be various cameras capable of acquiring images of gap gaps.

The image of the transmission hole according to the distance, the direction or the light amount of the light source is obtained by the camera module 17, whereby the visual characteristics of the light source can be analyzed, and the lens unit of the object module . The camera module 17 can be made into various structures capable of acquiring images of the transmission holes having various specifications and is not limited to the illustrated embodiment.

The optical probe according to the present invention can be miniaturized and can be easily applied to various light emitting devices or light emitting devices. The optical probe according to the present invention enables measurement of light emission characteristics at various positions and enables analysis of various optical characteristics. For example, an optical probe according to the present invention allows measurement of luminance, radiance, chromaticity, or similar optical characteristics. In addition, the optical probe according to the present invention enables optical characteristics to be precisely measured at various distances and angles with respect to the light source.

While the present invention has been particularly shown and described with reference to exemplary embodiments thereof, it will be understood by those of ordinary skill in the art that various changes in form and details may be made therein without departing from the spirit and scope of the invention . The invention is not limited by these variations and modifications, but is limited only by the claims appended hereto.

11: frame module 12: object module
13: Light detection guide 14: Transmission cable unit
15: 1 reflection module 16: 2 reflection module
17: camera module 18: induction module
19: Control module 111: Front cover
171: camera bracket 172: lens holder

Claims (4)

A frame module 11 having a receiving space therein;
An object module 12 protruding in a cylinder shape from a front surface of the frame module 11;
A one-reflection module (15) for reflecting light incident from the object module (12) into the interior of the frame module (11) while partially transmitting the light through a transmission hole;
A two-reflection module (16) for guiding the light reflected by the one reflection module (15) in a predetermined direction;
A camera module (17) for detecting an image of a transmission hole from light derived from a reflection module (16); And
And a light detection guide (13) for guiding light transmitted through the transmission hole (13). The optical probe according to claim 1, comprising at least one lens disposed within the object module (12). The optical probe for measurement of luminescence characteristics according to claim 1, wherein the one reflection module (15) comprises a planar interchangeable mirror surface arranged in an inclined shape, and a transmission hole is formed at the center of the mirror surface. The optical probe for measurement of luminescence characteristics according to claim 1, further comprising a connection port formed in the frame module (11).

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