Title:
【考案の名称】焦電型赤外線センサ
Document Type and Number:
Japanese Patent JPH0631387
Kind Code:
Y2
Abstract:
A pyroelectric infrared sensor includes a package (1) having a light-receiving window (26) and at least two dual pyroelectric elements (24,25) arranged in the package, each of the dual pyroelectric elements (24,25) having first and second unit pyroelectric elements (20a,20b;21a,21b), the first and second unit pyroelectric elements being connected in series or parallel with each other so as to have opposite polarities. The first and second light-receiving electrodes (14a,14b;15a,15b) and the first and second back electrodes (16a,16b;17a,17b) are formed such that an effective light-receiving electrode area of the first unit pyroelectric element (20b;21a) opposing a central portion of the light-receiving window (26) is smaller than an effective light-receiving electrode area of the second unit pyroelectric element (20a;21b) opposing a peripheral portion of the light-receiving window (26). A difference between secondary infrared rays incident on the first and second unit pyroelectric elements which is caused by a difference between angles of visibility of these elements with respect to the light-receiving window can be compensated. This invention also relates to a method of manufacturing the dual pyroelectric element.
Inventors:
Nagai Aisaku
Nei Tetsuaki
Nei Tetsuaki
Application Number:
JP4968088U
Publication Date:
August 22, 1994
Filing Date:
April 13, 1988
Export Citation:
Assignee:
Kureha Chemical Industry Co., Ltd.
International Classes:
G01V8/20; G01J1/02; G01J5/02; G01J5/34; H01L37/02; (IPC1-7): G01J1/02; G01J5/02
Domestic Patent References:
| JP6188114A |
Attorney, Agent or Firm:
Tsuchiya Masaru
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