KR101249476B1 - Lens for ir-tv used for diagnosing plasma of kstar apparatus - Google Patents

Abstract

Disclosed is a relay lens module for an IR-TV used for plasma diagnosis of a KSTAR device. The relay lens module according to the embodiment of the present invention includes a housing in which one side is mounted to at least one or more ports provided in the KSTAR device and the other side is connected to an infrared camera, a telecentric aperture disposed on one side of the housing, and a housing. An input lens unit including first to third lenses that are sequentially arranged adjacent to the telecentric stop and forming an image corresponding to the inside of the KSTAR apparatus, and fourth to sixth which are sequentially arranged at a rear end of the input lens unit. A relay lens unit including a lens and primarily transferring an image formed by the input lens unit, and seventh to ninth lenses sequentially disposed at a rear end of the relay lens unit, and the image formed by the relay lens unit A planar mirror disposed at the rear end of the output lens unit and the output lens unit to transmit the difference, and reflecting an image formed by the output lens unit to be incident on the infrared camera. It includes.

Description

LENS FOR IR-TV USED FOR DIAGNOSING PLASMA OF KSTAR APPARATUS

Embodiments of the present invention relate to a relay lens module for an IR-TV used for plasma diagnosis of a KSTAR device.

When the material is heated to hundreds of millions of degrees, electrons are separated one by one from the molecular gas and separated into negatively charged electrons and positively charged ions. This state is called plasma. Taking into account that the plasma is composed of charged particles, it is a self-constrained nuclear fusion method applied to the tokamak by applying a strong magnetic field to force the charged particles to revolve around them, thus floating the plasma in the air and heating it.

Korean tokamak device is a KSTAR (KOREA SUPERCONDUCTING TOKAMAK ADVANCED RESEARCH) device. As with any Tokamak device, plasma diagnostics are important for KSTAR devices. There are various plasma diagnostic devices for this purpose, and one of them may be an infrared ray television (IR-TV).

IR-TV is a type of imaging device that monitors the temperature of the KSTAR device (for example, the temperature of a structure or a plasma contact wall of the KSTAR device). This IR-TV photographs the plasma formed inside the KSTAR apparatus using an infrared camera. However, because the temperature of the plasma itself is very high, it is difficult to insert, mount or access an infrared camera in a KSTAR device, which limits the angle of view of the infrared camera.

In addition, when the fusion reaction in a high magnetic field, such as the KSTAR device, the infrared camera should be installed away from the KSTAR device because it is affected by the magnetic particles and the neutral particles resulting from the fusion reaction.

Therefore, it is necessary to provide a separate configuration in the IR-TV for protecting the infrared camera and simultaneously increasing the angle of view and imaging the inside of the KSTAR device and transmitting it to the infrared camera.

The present invention is to solve the above-mentioned problems, an object of the present invention, can be mounted on the KSTAR device for plasma diagnosis to increase the angle of view, to form an image of the interior of the KSTAR device, and to transfer the image to the infrared camera It is to provide a relay lens module for.

In one embodiment, a relay lens module for an IR-TV used for plasma diagnosis of a KSTAR device includes a housing, one side of which is mounted to a port provided in the KSTAR device and the other side of which is connected to an infrared camera; A telecentric aperture disposed on one side of the lens, including a first to third lenses disposed in sequence adjacent to the telecentric aperture in the housing and forming an image corresponding to the inside of the KSTAR apparatus; A relay lens unit including an input lens unit, fourth to sixth lenses sequentially disposed at the rear end of the input lens unit, and sequentially transmitting the image formed by the input lens unit to the rear end of the relay lens unit; An output lens unit including seventh to ninth lenses and secondly transferring the formed image transmitted by the relay lens unit, and disposed at a rear end of the output lens unit; And a planar mirror which reflects the formed image transmitted by the output lens unit and enters the infrared camera.

According to one side, the first to ninth lens is a spherical lens made of calcium fluoride (CaF ₂ ), the lens thickness is 5mm ~ 30mm, the maximum diameter may be 100mm ~ 150mm.

According to one side, the relay lens module has a field of view of 58 ° or less, the total length may be 2.6m or more.

According to embodiments of the present invention, the relay lens module constituting the IR-TV may be mounted on the KSTAT device for plasma diagnosis to increase the angle of view, to form an image of the inside of the KSTAR device, and to form an image as an infrared camera. Transmission to facilitate imaging.

In addition, the infrared lens module is installed away from the KSTAR apparatus by the relay lens module to protect the infrared camera from the neutral particles generated as a result of the magnetic field and the fusion reaction in the KSTAR apparatus.

1 is a diagram illustrating an arrangement structure of an IR-TV including a relay lens module according to an exemplary embodiment of the present invention.
FIG. 2 is a diagram illustrating a specific configuration of the relay lens module illustrated in FIG. 1.
3 is a picture taken of the actual IR-TV according to an embodiment of the present invention.

Hereinafter, embodiments of the present invention will be described in detail with reference to the accompanying drawings. In the following description of the present invention, detailed description of known functions and configurations incorporated herein will be omitted when it may make the subject matter of the present invention rather unclear. Also, terminologies used herein are terms used to properly represent preferred embodiments of the present invention, which may vary depending on the user, intent of the operator, or custom in the field to which the present invention belongs. Therefore, the definitions of these terms should be based on the contents throughout this specification. Like reference symbols in the drawings denote like elements.

1 is a diagram illustrating an arrangement structure of an IR-TV including a relay lens module according to an exemplary embodiment of the present invention. Referring to FIG. 1, the KSTAR (KOREA SUPERCONDUCTING TOKAMAK ADVANCED RESEARCH) device 10, which is a Korean-type tokamak device, constrains plasma using a magnetic field. However, even with the use of a magnetic field, the plasma tries to remain unstable. Therefore, the plasma must be continuously observed and maintained in a stable state. To this end, it is important to arrange or install various plasma diagnosis apparatuses in the KSTAR apparatus 10 to diagnose plasma.

There are a variety of plasma diagnostic devices, one of which may be an Infrared Rays Television (IR-TV) 100 as shown in FIG. The IR-TV 100 is a kind of image diagnosis apparatus for monitoring the temperature of the KSTAR apparatus 10.

When imaging the plasma formed in the KSTAR apparatus 10, since the temperature of the plasma itself is very high, it is difficult to insert, mount, or insert the infrared camera 120 for imaging in the KSTAR apparatus 10. For this reason, the angle of view of the infrared camera is limited.

In addition, when the fusion reaction in a high magnetic field, such as the KSTAR device 10, the infrared camera should be spaced apart from the KSTAR device 10 because the infrared camera is affected by the neutral particles resulting from the magnetic field and the fusion reaction.

Accordingly, in the present invention, as shown in FIG. 1, the IR-TV 100 relays the relay lens module to form an image of the inside of the KSTAR device 10 in addition to the infrared camera 120 and to transfer the image to the infrared camera 120. 110. In this case, the infrared camera 120 may be spaced apart from the KSTAR apparatus 10 by the relay lens module 110.

Meanwhile, the relay lens module 110 is disposed in a cassette 11 installed in at least one or more ports (eg, D-ports) among a plurality of ports provided in the KSTAR apparatus 10 to access the KSTAR apparatus 10. can do.

The relay lens module 110 has a total length of 2.6 mm or more, and functions to connect the KSTAR device 10 and the infrared camera 120. In detail, the relay lens module 110 forms an image corresponding to the inside of the KSTAR apparatus 10 and transmits the image to the infrared camera 120. A detailed configuration of the relay lens module 110 will be described with reference to FIG. 2.

FIG. 2 is a diagram illustrating a specific configuration of the relay lens module illustrated in FIG. 1. Referring to FIG. 2, the relay lens module 110 is a periscope device, which includes a housing 111, a telecentric aperture 111a, an input lens unit A, and a relay lens unit B. , The output lens portion C and the plane mirror 111k.

The housing 111 is a case for protecting other components constituting the relay lens module 110. One side of the housing 111 is mounted to a port provided in the KSTAR apparatus 10, and the other side thereof is connected to the infrared camera 120. In particular, the other side of the housing 111 may have a structure that is easy to attach and detach from the infrared camera 120. For example, the other side of the housing 111 may include an opening corresponding to the size of a lens unit (not shown) of the infrared camera 120, and may have a structure in which the lens unit of the infrared camera 120 is fitted and attached thereto. have.

The telecentric stop 111a is disposed at one side of the housing 111. The telecentric stop 111a maintains the size of the object (inside the KSTAR apparatus 10) regardless of the distance and forms an image.

The input lens unit A, the relay lens unit B, and the output lens unit C are disposed in the housing 111 to form an image corresponding to the inside of the KSTAR apparatus 10, and transmit the formed image.

By the input lens unit A, the image input through the aperture is converted into an inverted phase and transferred to the relay lens unit B in parallel. The input lens unit is configured to transmit light of an input image in parallel with a longitudinal direction of the housing.

The input lens unit A includes first to third lenses 111b, 111c, and 111d. The input lens unit A is disposed adjacent to the telecentric stop 111a, and the first lens 111b, the second lens 111c, and the third lens 111d are sequentially disposed. The first to third lenses 111b, 111c, and 111d receive light formed by the telecentric stop 111a and form an image.

The relay lens unit B changes the image coming out through the input lens unit into reversed phase and transfers the image to the output lens unit C in parallel.

The relay lens part B includes the fourth to sixth lenses 111e, 111f, and 111g. The relay lens portion B is disposed at the rear end of the input lens portion A, and the fourth lens 111e, the fifth lens 111f, and the sixth lens 111g are sequentially disposed. The fourth to sixth lenses 111e, 111f, and 111g primarily transmit an image formed by the input lens unit A. FIG. That is, the relay lens unit B may be configured to primarily transmit an image formed to the infrared camera 120.

The output lens unit collects the image coming through the relay lens unit and transfers the image to the plane mirror.

The output lens unit C includes seventh to ninth lenses 111g, 111i, and 111j. The output lens portion C is disposed at the rear end of the relay lens portion B, and the seventh lens 111g, the eighth lens 111i, and the ninth lens 111j are disposed in this order. The seventh through ninth lenses 111g, 111i, and 111j secondly transfer an image transmitted by the relay lens unit B. FIG. That is, the output lens unit C may be configured to secondarily transfer an image formed to the infrared camera 120.

The planar mirror 111k is disposed at the rear end of the output lens unit C in the housing 111, and reflects an image transmitted by the output lens unit C to be connected to the other side of the housing 111. Incident).

The relay lens module 110 including the housing 111 may have a total length of 2.6 m or more and may have a field of view of 58 ° or less.

The first to ninth lenses 111b to 111j included in each of the input lens unit A, the relay lens unit B, and the output lens unit C may be spherical lenses made of calcium fluoride (CaF ₂ ). have. In addition, these lens thickness is 5mm ~ 30mm, the maximum diameter can be 100mm ~ 150mm. In addition, since the first to ninth lenses 111b to 111j have a small input pupil size, influences from heat and neutrons may be reduced.

Specific detailed specifications related to the relay lens module 110 are shown in Table 1.

Surface type
(surface type) Radius of curvature
(radius) Lens thickness
(thickness) material
(material) caliber
(aperture) object - ∞ ∞ - - Telecentric aperture - ∞ 5 - 2.5 First lens Sphere -22.36 25 CaF ₂ 15 Sphere -24.7 103 20 Second lens Sphere -709 25 CaF ₂ 60 Sphere -114 73.5 65 Third lens Sphere 442.94 25 CaF ₂ 75 Sphere -275.1 0 75 Gap (front) Sphere ∞ 267 Fourth lens Sphere 271.8 25 CaF ₂ 75 Sphere -566 309 75 Fifth lens Sphere 113.2 10 CaF ₂ 45 Sphere 296 334 45 Sixth lens Sphere 663.8 25 CaF ₂ 70 Sphere -254.7 183 70 Seventh lens Sphere 243 25 CaF ₂ 75 Sphere ∞ 0 75 Gap (back) Sphere ∞ 754 Eighth lens Sphere 116.2 17.5 CaF ₂ 50 Sphere 490 12 45 Ninth lens Sphere -178.8 25 CaF ₂ 45 Sphere -456 157 50 Plane mirror Sphere ∞ -300 45

Details of the relay lens module 110 as shown in Table 1 are just one embodiment. In particular, values for the radius of curvature, lens thickness, material, and aperture of the first to ninth lenses 111b to 111j may vary. 3 is a picture taken of the actual IR-TV according to an embodiment of the present invention. Referring to FIG. 3, the IR-TV includes a relay lens module 210 and an infrared camera 220.

The relay lens module 210 may have the same configuration as the relay lens module 210 shown in FIG. 2. The relay lens module 210 is mounted in a port provided in the KSTAR device to form an image corresponding to the inside of KSTAR, and transmit the formed image to the infrared camera 220.

Such a relay lens module 210 is compatible with the infrared camera 220 connected to the rear end, the effective focal length of about 19.0741, the back focal length of about 100.3376, of about 5mm It has an entrance pupil diameter, a length of 2.7m and an aperture value F # of 3.81.

Infrared camera 220 is FLIR SC6000HS model, resolution of 640 × 512 (pixels), full frame rate of 1Hz ~ 125Hz, spectral range of 3 ~ 5㎛, temperature resolution below 25mK (NETD, Noise Equivanlent Temperature Difference), detector type consisting of indium antimony (InSb), physical size of 206 × 143 × 159 (length × width × height), measuring range from 0 ℃ to 1500 ℃, and 14 bit Has a data resolution of (Data Resolution).

The temperature of the plasma formed inside the KSTAR apparatus is monitored using the IR-TV shown in FIG. 3. In addition, the IR-TV may be mounted in a plurality of ports provided in the KSTAR device to monitor the temperature of the plasma in each port area. Therefore, it is possible to protect the safety of the KSTAR device from high temperature through image diagnosis using IR-TV.

The relay lens module 210 and the infrared camera 220 described with reference to FIG. 3 are merely examples, and their characteristics may also be changed instead of fixed.

As described above, although the present invention has been described with reference to the limited embodiments and the drawings, the present invention is not limited to the above embodiments, and those skilled in the art to which the present invention pertains various modifications and variations from such descriptions. This is possible. Therefore, the scope of the present invention should not be limited to the described embodiments, but should be determined not only by the claims below but also by the equivalents of the claims.

10: KSTAR device
100: IR-TV
110, 210: relay lens module
111: Housing
111a: telecentric aperture
111b to 111j: first to ninth lenses
111k: telecentric aperture
120, 220: infrared camera

Claims (3)

In the relay lens module for IR-TV used for plasma diagnosis of the KSTAR device,
A housing having one side mounted to a port provided in the KSTAR apparatus and the other side connected to an infrared camera;
A telecentric aperture disposed on one side of the housing;
An input lens unit including first to third lenses sequentially disposed adjacent to the telecentric stop within the housing and forming an image corresponding to the inside of the KSTAR device;
A relay lens unit including fourth to sixth lenses sequentially disposed at a rear end of the input lens unit, and primarily transferring an image formed by the input lens unit;
An output lens unit including seventh to ninth lenses sequentially arranged at a rear end of the relay lens unit, and secondly transferring the formed image transferred by the relay lens unit; And
A planar mirror disposed at a rear end of the output lens unit and reflecting the formed image transmitted by the output lens unit to enter the infrared camera,
The first to ninth lenses are spherical lenses made of calcium fluoride (CaF ₂ ),
The first lens has a radius of curvature of the side where light is incident is -22.36 mm, a radius of curvature of the side where light exits is -24.7 mm, a lens thickness of 25 mm, and an aperture of 15 mm.
The second lens has a radius of curvature of the light incident surface of -709mm, a radius of curvature of the surface from which light exits -114mm, a lens thickness of 25mm, a diameter of 60mm,
The third lens has a radius of curvature of the plane where light is incident is 442.94 mm, a radius of curvature of the plane where light exits is -275.1 mm, a lens thickness of 25 mm, and an aperture of 75 mm.
The fourth lens has a curvature radius of 271.8 mm at the side where light is incident, a radius of curvature at the side at which light exits -566 mm, a lens thickness of 25 mm, and a diameter of 75 mm.
The fifth lens has a radius of curvature of 113.2mm at the side where light enters, a radius of curvature of the side at which light exits at 296mm, a thickness of 10mm, a diameter of 45mm,
The sixth lens has a radius of curvature of 663.8 mm at the side where light is incident, a radius of curvature at the side at which light exits -254.7 mm, a lens thickness of 25 mm, and a diameter of 70 mm.
The seventh lens has a radius of curvature of 243 mm at the side where light is incident on, a radius of curvature of the side at which light exits, ∞, a thickness of 25 mm, and a diameter of 75 mm.
The eighth lens has a radius of curvature of 116.2 mm at the side where light enters, a radius of curvature of the face at which light exits at 490 mm, a thickness of 17.5 mm, and a diameter of 50 mm.
The ninth lens has a radius of curvature of the light incident surface of -178.8 mm, a radius of curvature of the light exiting surface of -456 mm, a lens thickness of 25 mm, and an aperture of 45 mm,
Relay lens module.
delete The method of claim 1,
The relay lens module,
Repeating lens module, characterized in that the field of view is less than 58 °, the total length is more than 2.6m.

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