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Ceramic optical element and its producing method

A technology of optical components and manufacturing methods, applied in the field of optical components, capable of solving problems such as detection

Inactive Publication Date: 2003-04-09
SUMITOMO ELECTRIC IND LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

Therefore, in the application of the sensor, when the ZnS sintered body is applied to the window or the lens, although the distance between the window or the lens and the sensor is long, it can shield visible light, but in the short distance, it will produce scattered light. Issues Detected as Noise

Method used

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  • Ceramic optical element and its producing method
  • Ceramic optical element and its producing method
  • Ceramic optical element and its producing method

Examples

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Effect test

no. 1 example

[0029] The ceramic material is prepared using a material composed of ZnS as the main component. A powder composed of ZnS with an average particle diameter of 1 μm and a purity of 99.99% or higher was prepared as a main component raw material. To this main component powder, various additive powders were added as described below, and the additives were mixed with the main component by the following mixing method. Prepare iron powder with an average particle size of 2 μm and a purity of 98.2% or more, cobalt powder with an average particle size of 1 μm and a purity of 99.9% or more, and Fe with an average particle size of 0.5 μm and a purity of 99.7% or more 3 o 4 powder as an additive. Mix and add 0.2wt% iron powder, 0.2wt% cobalt powder, 0.01wt% Fe to the aforementioned ZnS powder 3 o 4 Powder, mixed by dry ball mill for 20 hours.

[0030] Thereafter, the mixed powder is filled into a vibrating rubber mold, and the rubber mold is capped and vacuumed to seal it. Then put i...

no. 2 example

[0034] The same ZnS powder as in the first embodiment was prepared as a main component. Next, cobalt powder with an average particle size of 1 μm and a purity of 99.9% or more, iron powder with an average particle size of 2 μm and a purity of 98.2% or more, and carbon black with an average particle size of 0.01 μm and a purity of 99.8% or more were prepared as additives. 0.5wt% cobalt powder, 0.5wt% iron powder, and 0.001wt% carbon black were added to the aforementioned ZnS powder, and mixed by dry ball milling for 20 hours. Thereafter, the same molding, sintering, and mirror-finishing of the upper and lower surfaces were carried out as in the first embodiment, and finally a sintered body with a diameter of 55 mm and a thickness of 0.5 mm was obtained. The obtained sintered body was densified with a relative density of almost 100%.

[0035] The in-line light transmittance of the obtained sintered body sample was measured with a spectrophotometer and a laser in the same manner...

no. 3 example

[0037] The same ZnS powder as in the first embodiment was prepared as a main component. Next, prepare Fe with an average particle size of 0.5 μm and a purity of 99.7% or more 3 o 4 Powder, silver powder with an average particle size of 2μm and a purity of 99.9% or more is used as an additive. Add 0.05wt% Fe to the aforementioned ZnS powder 3 o 4 Powder, 0.05wt% silver powder, mixed by dry ball mill for 20 hours. Thereafter, the same molding, sintering, and mirror-finishing of the upper and lower surfaces were carried out as in the first embodiment, and finally a sintered body with a diameter of 55 mm and a thickness of 0.5 mm was obtained. The density of the obtained sintered body was 4.09, which was almost the same as the theoretical density, and it was confirmed that it was densely sintered. In the same manner as in the first embodiment, it is measured using a spectrophotometer and a laser. The result is as image 3 shown by the solid line. The solid line and ▲ indic...

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Abstract

In an optical element for infrared light, a material is sought that does not transmit visible light to near-infrared light that becomes noise as much as possible, and that maximizes the light transmittance of far-infrared light. If ZnS, ZnSe or Ge ceramics contain one or more additives that shield visible light to near-infrared light, an optical element material that shields part or all of visible light to near-infrared light and has good far-infrared light transmission can be obtained . Since this optical element material does not generate noise from visible light to near-infrared light, it is possible to provide materials that are most suitable for this purpose or application as optical elements such as window materials and lens materials used in high-performance infrared light utilization devices.

Description

technical field [0001] The present invention relates to an optical element permeable to far-infrared light, and in particular to an optical element for a far-infrared optical system element with optical shielding properties for light from visible light to near-infrared light, and the optical element The method of manufacturing the component. Background technique [0002] Utilizing the excellent performance of infrared light, we continue to develop new high-performance devices. As for practical applications utilizing its sensing function, for example, a surface thermometer that can be applied to the surface of an object for non-contact measurement, a resource exploration system that detects the distribution of resources on the earth from above, a device that detects objects in a dark field, As a sensor for human body detection, and use the sensor for human body detection security system and gas analysis equipment, etc. In addition, an infrared light image processing device ...

Claims

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Application Information

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IPC IPC(8): G02B1/00G02F1/03
Inventor 长谷川干人
Owner SUMITOMO ELECTRIC IND LTD
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