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South Pole infrared telescope sealing window capable of preventing and removing frost and manufacturing method thereof

An infrared telescope and Antarctic technology, applied in optics, instruments, optical components, etc., can solve the problems of serious absorption of infrared bands and inability to meet infrared astronomical observations, and achieve the effect of improving infrared transmittance

Inactive Publication Date: 2015-04-29
NANJING INST OF ASTRONOMICAL OPTICS & TECH NAT ASTRONOMICAL OBSE
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  • Application Information

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Problems solved by technology

[0004] Today's Antarctic astronomical telescopes use ITO film (indium tin oxide layer) to defrost the lens or seal the window. The ITO film has a relatively high transmittance in visible light, but its absorption in the infrared band is very serious. , unable to meet the needs of infrared astronomical observation

Method used

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  • South Pole infrared telescope sealing window capable of preventing and removing frost and manufacturing method thereof
  • South Pole infrared telescope sealing window capable of preventing and removing frost and manufacturing method thereof
  • South Pole infrared telescope sealing window capable of preventing and removing frost and manufacturing method thereof

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Embodiment 1

[0022] Embodiment 1, the anti-frost and defrosting Antarctic infrared telescope window sealing and preparation method thereof:

[0023] Step 1, refer to Figure 1: A layer of ITO conductive film 2 (planar conductive film, also known as isolated transparent conductive film) is plated on the surface of the entire (lens) sealing window 1, and the ITO film is plated by ion beam assisted deposition process, vacuum less than 8.0x10 -4 Pa, substrate temperature 250°C, oxygenation capacity 15sccm, ion source plate voltage 250V, ion beam current 150A / ㎝ 2 , the thickness of the ITO thin film is less than or equal to 30nm, at this time, the resistance of the conductive film will be greater than 140Ω, and the absorption in the infrared region is small.

[0024] In step 2, the workpiece is used for shielding, and a dielectric anti-reflection coating 3 (also called an infrared anti-reflection coating or an anti-reflection coating) is plated in the shape shown in FIG. 2 . The infrared anti-...

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Abstract

The invention discloses a South Pole infrared telescope sealing window capable of preventing and removing frost and a manufacturing method thereof. An optical medium film system is arranged on a substrate of sealing window glass; the optical medium film system contains a transparent conductive film layer; the South Pole infrared telescope sealing window is characterized in that the transparent conductive film layer is divided into two layers, namely a planar transparent conductive film and a linear transparent conductive film; an insulating dielectric antireflective film layer is arranged between the planar transparent conductive film and the linear transparent conductive film; two electrodes are arranged on the edge of the upper surface of the transparent conductive film layer; the linear transparent conductive film and the planar transparent conductive film are connected in parallel. The invention is applicable to sealing window defrosting of a sealing window-type South Pole infrared telescope; the problem that the conventional transparent conductive film cannot be applied to an infrared spectral zone is solved; the infrared transmittance of the sealing window is improved to a great extent.

Description

technical field [0001] The invention belongs to the field of optical thin films. It relates to a sealed window of an Antarctic infrared telescope capable of preventing and defrosting. The invention also relates to a preparation method for the sealing window of the Antarctic infrared telescope capable of preventing and defrosting. Background technique [0002] Antarctic astronomy is an important direction for the development of Chinese astronomy. Antarctic Ice Dome A is one of the best observatory sites in the world. The extremely cold environment of Ice Dome A is likely to cause frost on the internal structure of the astronomical telescope. In order to avoid frosting on the optical surface inside the astronomical telescope, small Antarctic telescopes mostly adopt a sealed window structure, and a visible light transparent conductive film is coated on the surface of the sealed window. [0003] Infrared astronomy is an important direction for the development of Antarctic astr...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G02B1/116G02B1/18H05B3/84
CPCG02B1/116H05B3/84
Inventor 田杰王晋峰李新南王烨儒
Owner NANJING INST OF ASTRONOMICAL OPTICS & TECH NAT ASTRONOMICAL OBSE
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