JPS645128U - - Google Patents

Info

Publication number

JPS645128U

JPS645128U JP9659787U JP9659787U JPS645128U JP S645128 U JPS645128 U JP S645128U JP 9659787 U JP9659787 U JP 9659787U JP 9659787 U JP9659787 U JP 9659787U JP S645128 U JPS645128 U JP S645128U

Authority

JP

Japan

Prior art keywords

pair

pyroelectric infrared

detecting elements

infrared detecting

fresnel lens

Prior art date

1987-06-25

Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)

Pending

Links

• Espacenet
• Global Dossier
• Discuss

• 238000010586 diagram Methods 0.000 description 3
• 238000001514 detection method Methods 0.000 description 1
• 230000003287 optical effect Effects 0.000 description 1

Cited By (3)