KR102082769B1 - Michelson interferometer having moveable reflective mirror - Google Patents

Abstract

The present invention discloses a Michelson interferometer having a mobile reflector fixing structure. The Michelson interferometer having a mobile reflector fixing structure according to an embodiment of the present invention is a Michelson interferometer including a mobile reflector assembly, a fixed reflector assembly, a beam splitting assembly, a lens assembly, the housing for fixing a plurality of optical components It includes, the housing is divided into two structures are coupled, the mobile reflector assembly is a structure fixed to one side of the two divided housing.

Description

MICHELSON INTERFEROMETER HAVING MOVEABLE REFLECTIVE MIRROR}

The present invention relates to a Michelson interferometer having a mobile reflector fixing structure, and more particularly, to a Michelson interferometer having a mobile reflector fixing structure of a structure for directly fixing a mobile reflector assembly to a housing.

InfraRed Spectrometers come in various forms, including filter, dispersive, and Fourier transform, depending on the structure of the device. Since the dispersion type and the filter type have a problem in that the light reaching the detector is weak, most commercially available infrared spectroscopy are Fourier transform infrared spectroscopy (FTIR).

The Michelson-type interferometer applied to the Fourier Transform InfraRed (FTIR) spectrometer has an incident light source divided by a light splitting assembly so that one side is incident to the fixed reflector and the other side is incident to the movable reflector. The interference occurs due to the relative path difference of the light, and the interference signal is obtained by measuring it with a detector.

These Michelson interferometers are very sensitive to the assembly and alignment of these optical components, because there are a number of optical components such as a light splitting assembly, a fixed reflector assembly, a mobile reflector assembly, a lens assembly, and also must be located at the correct point Device.

However, the housing structure used in the conventional Michelson interferometer is a monolithic structure in which a plurality of optical components such as the light splitting assembly, the fixed reflector assembly, the moving reflector assembly, the lens assembly, and the like are optical components constituting the Michelson interferometer. In addition to the need for a separate support, as well as many alignment elements to be considered in the optical alignment of the interferometer requires a lot of time and effort for assembly and alignment.

Particularly, in the case of the mobile reflector assembly, as shown in FIG. 1, the optical reflector is fixed to the housing of the Michelson interferometer through a separate support structure together with a drive unit for driving the mobile reflector assembly. Since this becomes disturbed, there is a problem that optical alignment becomes more difficult.

Korean Utility Model Application No. 20-0312921

One embodiment of the present invention to prevent the optical axis distortion due to external vibration and shock through the stable fixing structure of the mobile reflector assembly and the housing in order to overcome the problems of the prior art, to maintain the optical axis alignment of the mobile reflector to improve precision To provide a Michelson interferometer having a movable reflector fixing structure.

According to an aspect of the present invention, in the Michelson interferometer comprising a mobile reflector assembly, a fixed reflector assembly, a light splitting assembly, a lens assembly, comprising a housing for fixing a plurality of optical components, the housing is divided into two The mobile reflector assembly may be a structure fixed to one side of the housing divided into two.

The housing may include a first housing and a second housing that are divided diagonally in a hexahedral shape, and the first housing and the second housing may be coupled to each other in a diagonal direction.

The first housing has a first surface on which the fixed reflector assembly is mounted, a second surface formed to be perpendicular to the first surface, and an angle of 45 degrees with the second surface, and includes a light splitting assembly in which light is incident from the outside. It may include a first diagonal surface.

The first reflecting mirror assembly and the light splitting assembly may be coupled to the first housing.

The first housing may have a structure forming a right triangle shape with respect to a plane.

The second housing may include a third surface on which the mobile reflector assembly is mounted, a fourth surface formed to be perpendicular to the third surface, and a second diagonal surface corresponding to the first diagonal surface.

The second housing may have a structure in which three surfaces communicate with each other.

The second housing may have a structure that forms a right triangle shape with respect to a plane.

The mobile reflector assembly and the lens assembly may be coupled to the second housing.

The Michelson interferometer may further comprise a fixing ring for coupling the light splitting assembly to the first housing.

The fixing ring may be coupled to the light splitting assembly by using a fixing screw to the first housing.

The fixing ring may have a structure larger than the diameter of the outer peripheral portion of the light splitting assembly.

According to one embodiment of the present invention, the Michelson interferometer having a mobile reflector fixing structure, by applying a structure to directly fix the mobile reflector assembly to the housing, it is possible to stable linear drive of the mobile reflector assembly, the mobile reflector assembly and the housing Stable fixing structure of the can prevent the optical axis distortion due to external vibration and shock can provide an effect to improve the precision.

1 is a schematic diagram showing a conventional mobile reflector assembly driving unit.
2 is a schematic diagram of a Michelson interferometer having a mobile reflector fixing structure according to an embodiment of the present invention.
3 is a schematic diagram of a first housing of a Michelson interferometer having a mobile reflector fixing structure according to an embodiment of the present invention.
4 is a schematic diagram of a second housing of a Michelson interferometer having a mobile reflector fixing structure according to an embodiment of the present invention.

The embodiments described below are provided to enable those skilled in the art to easily understand the technical spirit of the present invention, and the present invention is not limited thereto. In addition, matters represented in the accompanying drawings may be different from those actually implemented in the schematic drawings in order to easily explain the embodiments of the present invention.

When a component is referred to as being connected or connected to another component, it is to be understood that although the component may be directly connected or connected to the other component, there may be other components in between.

In addition, the term "connection" herein includes direct connection and indirect connection between one member and another member, and may mean all physical connections such as adhesion, attachment, fastening, bonding, and coupling.

Also, an expression such as 'first' and 'second' is used only for distinguishing a plurality of configurations, and does not limit the order or other features between the configurations.

Singular expressions include plural expressions unless the context clearly indicates otherwise. The terms "comprises" or "having" are intended to mean that there is a feature, number, step, operation, component, part, or combination thereof described on the specification, and one or more other features or numbers, It can be interpreted that steps, actions, components, parts or combinations thereof may be added.

2 is a schematic diagram of a Michelson interferometer having a mobile reflector fixing structure according to an embodiment of the present invention, Figure 3 is a Michelson interferometer having a mobile reflector fixing structure according to an embodiment of the present invention of FIG. 4 is a schematic diagram of a first housing, and FIG. 4 is a schematic diagram of a second housing of a Michelson interferometer having a mobile reflector fixing structure according to one embodiment of the present invention.

2 to 4, a mobile reflector assembly 200, a fixed reflector assembly 300, a light splitting assembly 400, a lens assembly 500, and a housing 100 for fixing the plurality of optical components are described. It includes, the housing 100 is a structure divided into two are coupled, the mobile reflector assembly 200 is a structure fixed to one side of the two-divided housing 100.

In one specific example, the housing 100 includes a first housing 110 and a second housing 120 divided diagonally in a hexahedral shape, and the first housing 110 and the second housing 120. ) Are diagonal to each other and joined together.

The first housing 110 may include a first surface 111 on which the fixed reflector assembly 300 is mounted, a second surface 112 and a second surface formed to be perpendicular to the first surface 111. The first diagonal surface 113 is formed at an angle of 45 degrees with the light splitting assembly 400 to which light is incident from the outside, and the first housing 110 is based on a plane. It has a right triangle shape. That is, the fixed reflector assembly 300 and the light splitting assembly 400 are coupled to the first housing 110.

In addition, the second housing 120 has a third surface 121 on which the mobile reflector assembly 200 is mounted, a fourth surface 122 formed to be perpendicular to the third surface 121, and the first diagonal surface. A second diagonal surface 123 corresponding to 113 is included, and the second housing 120 has a right triangle shape with respect to a plane. That is, the mobile reflector assembly 200 and the lens assembly 500 are coupled to the second housing 120.

That is, through the separation and coupling structure of the first housing 110 and the second housing 120, which are divided and coupled through the diagonal surfaces 113 and 123, the fixed reflector among the optical components is mounted on the first housing 110. When the assembly 300 and the light splitting assembly 400 are combined, and the mobile reflector assembly 200 and the lens assembly 500 are coupled to the second housing 120, the first housing 110 and the second housing are combined. Only by coupling 120 can facilitate alignment of a number of optical components applied to the Michelson interferometer. In addition, since the optical components are fixedly coupled to the first housing 110 and the second housing 120 separated from each other, a plurality of optical components may also be easily coupled.

The Michelson interferometer having a mobile reflector fixing structure according to the present invention further includes a fixing ring 600 coupling the light splitting assembly 400 to the first housing 110.

The first diagonal surface 113 of the first housing 110 is drilled with a hole to which the light splitting assembly 400 is coupled, and when the light splitting assembly 400 is inserted into the coupling hole, the fixing ring 600 and Screw to the first housing 110 using a screw.

The fixing ring 600 is coupled to the light splitting assembly 400 to the first housing 110 by using a fixing screw, wherein the fixing ring 600 is larger than the diameter of the outer peripheral portion of the light splitting assembly 400. Do.

Referring to FIG. 2 to FIG. 4 together, the operation relationship according to an exemplary embodiment of the present invention is described. The housing 100 of the Michelson interferometer having the mobile reflector fixing structure has a first surface (1) of the first housing 110. The fixed reflector assembly 300 is coupled to the 111, and the light splitting assembly 400 is coupled to the first diagonal surface 113. In addition, the mobile reflector assembly 200 is coupled to the third surface 121 of the second housing 120, and the lens assembly 500 is coupled to the fourth surface 122.

Subsequently, the diagonal faces of the first housing 110 and the second housing 120 are coupled to face each other. When the diagonal faces of the first housing 110 and the second housing 120 face each other, the overall appearance is preferably a hexahedral shape. In the case of the housing 100 having such a hexahedral shape, the mobile reflector assembly 200, the fixed reflector assembly 300, the light splitting assembly 500, and the lens assembly are disposed on the side surfaces of the housing 100. It is preferable that the light splitting assembly 400 is located.

Among these, when the light splitting assembly 400 is coupled to the first housing 110, the light splitting assembly 400 is coupled using the fixing ring 600, and the fixing ring 600 partially covers the outer circumference of the light splitting assembly 400. While being coupled to the first housing 110 using a fixing screw.

Michelson interferometer having a mobile reflector fixing structure according to an embodiment of the present invention is applied to the structure of fixing the mobile reflector assembly directly to the housing to enable a stable linear drive of the mobile reflector assembly, the stable of the mobile reflector assembly and the housing The fixing structure can provide the effect of improving the precision by preventing optical axis distortion caused by external vibration and shock.

Those skilled in the art will appreciate that the present invention can be implemented in other specific forms without changing the technical spirit or essential features. Therefore, the exemplary embodiments described above are only selected and presented as the most preferred embodiments to help those skilled in the art from among various possible examples, and the technical spirit of the present invention is not limited or limited only by the presently disclosed embodiments. Rather, various changes, additions, and changes are possible within the scope without departing from the spirit of the present invention, as well as other equivalent embodiments. The scope of the present invention is indicated by the scope of the following claims rather than the detailed description, and all changes or modifications derived from the meaning and scope of the claims and the equivalent concept are included in the scope of the present invention. Should be interpreted. In addition, the inventors have defined the terms or words used in the present specification and claims based on the principle that the concept of terms can be properly defined in order to explain their invention in the best way. It should not be construed as limited to meaning. In addition, the order of the components described in the above-described process is not necessarily performed in a time-series order, and even if the order of execution of each component and step is changed, the process may fall within the scope of the present invention if the subject matter of the present invention is met. Of course.

100: housing 110: first housing
111: first side 112: second side
113: first diagonal surface 120: second housing
121: third side 122: fourth side
123: second diagonal 200: mobile reflector assembly
300: fixed reflector assembly 400: light splitting assembly
500: lens assembly 600: fixing ring

Claims (11)

In the Michelson interferometer comprising a mobile reflector assembly 200, a fixed reflector assembly 300, a light splitting assembly 400, a lens assembly 500,
It includes a housing 100 for fixing a plurality of optical parts,
The housing 100 is a structure that is divided into two divided, the mobile reflector assembly is a structure fixed to one side of the housing divided into two,
The housing 100 includes a first housing 110 and a second housing 120 divided diagonally in a hexahedral shape, and the first housing and the second housing are coupled to each other in a diagonal direction.
The first housing 110 has a first surface 111 on which the fixed reflector assembly 300 is mounted, a second surface 112 and a second surface 112 formed to be perpendicular to the first surface 111. At a 45 degree angle, and includes a first diagonal surface 113 on which a light splitting assembly 400 into which light is incident from the outside is mounted.
The second housing 120 has a third surface 121 on which the moving reflector assembly 200 is mounted, a fourth surface 122 formed to be perpendicular to the third surface 121, and the first diagonal surface 113. Includes a second diagonal surface 123 corresponding to
In order to enable linear driving of the movable reflector assembly 200 and to prevent optical axis distortion due to external vibration and shock, the movable reflector assembly 200 is directly fixed to one side of the housing 100. Michelson interferometer. delete delete The method of claim 1,
The Michelson interferometer, characterized in that the fixed reflector assembly 300 and the light splitting assembly 400 is coupled to the first housing (110). The method of claim 1,
The first housing 110 is a Michelson interferometer, characterized in that forming a right triangle with respect to the plane. delete The method of claim 1,
Michelson interferometer, characterized in that the second housing 120 is coupled to the mobile reflector assembly 200 and the lens assembly (500). The method of claim 1,
The Michelson interferometer is characterized in that the second housing 120 has a right triangle shape with respect to the plane. The method of claim 1,
The Michelson interferometer further comprises a fixing ring (600) for coupling the light splitting assembly (400) to the first housing (110). The method of claim 9,
The fixed ring 600 is a Michelson interferometer, characterized in that coupled to the light splitting assembly 400 to the first housing 110 using a fixing screw. The method of claim 10,
The fixed ring 600 is Michelson interferometer, characterized in that larger than the diameter of the outer peripheral portion of the light splitting assembly (400).

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