Infrared detective element
First Claim
1. An infrared detective element for detecting a dose of infrared rays by a change in electrical resistance of monofilaments composed mainly of silicon carbide upon infrared radiation thereto,the monofilaments having a resistivity of 1.0×
- 105 to 1.0×
103 Ω
.cm at room temperature and a diameter of 3 to 200 μ
m, the monofilaments being arranged between electrodes without bringing them into contact with each other.
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Accused Products
Abstract
An infrared detective element for detecting a dose of infrared rays by a change in electrical resistance of monofilaments composed mainly of silicon carbide upon infrared radiation thereto,
either the monofilaments having a resistivity of 1.0×105 to 1.0×103 Ω.cm at room temperature and a diameter of 3 to 200 μm,
or the monofilaments having a composition:
Si: 50 to 70 wt %
C: 28 to 40 wt %
O: 0 to 10 wt %
the balance (H and/or Ti or Zr): 0 to 10 wt %, and having a resistivity of 1.0×105 to 1.0×10-1 Ω.cm at room temperature and a diameter of 3 to 200 μm,
in either case, the monofilaments being arranged between electrodes without bringing them into contact with each other. The infrared detective elements of the present invention are excellent in properties, especially short response times.
12 Citations
2 Claims
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1. An infrared detective element for detecting a dose of infrared rays by a change in electrical resistance of monofilaments composed mainly of silicon carbide upon infrared radiation thereto,
the monofilaments having a resistivity of 1.0× - 105 to 1.0×
103 Ω
.cm at room temperature and a diameter of 3 to 200 μ
m, the monofilaments being arranged between electrodes without bringing them into contact with each other.
- 105 to 1.0×
-
2. An infrared detective element for detecting a dose of infrared rays by a change in electrical resistance of monofilaments composed mainly of silicon carbide upon infrared radiation thereto,
the monofilaments having a composition: -
Si 50 to 70 wt% C 28 to 40 wt% O;
0 to 10 wt%the balance (H and/or Ti or Zr);
0 to 10 wt%, and having a resistivity of 1.0×
105 to 1.0×
10-1 Ω
.cm at room temperature and a diameter of 3 to 200 μ
m, the monofilaments being arranged between electrodes without bringing them into contact with each other.
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Specification
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- Resources
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Current AssigneeHiroaki Yanagida, Nippon Carbon Co. Ltd., Sogo Security Services Co., Ltd.
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Original AssigneeHiroaki Yanagida, Nippon Carbon Co. Ltd., Sogo Security Services Co., Ltd.
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InventorsIchikawa, Hiroshi
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Primary Examiner(s)Lateef, Marvin M.
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Application NumberUS07/417,477Time in Patent Office621 DaysField of Search250/338.4, 250/370.01, 250/338.1, 357/30 K, 357/30 Q, 338/18, 338/22 R, 338/15, 338/25US Class Current338/18CPC Class CodesG01J 5/20 using resistors, thermistor...
