JPH01180687U - - Google Patents

Info

Publication number

JPH01180687U

JPH01180687U JP7190688U JP7190688U JPH01180687U JP H01180687 U JPH01180687 U JP H01180687U JP 7190688 U JP7190688 U JP 7190688U JP 7190688 U JP7190688 U JP 7190688U JP H01180687 U JPH01180687 U JP H01180687U

Authority

JP

Japan

Prior art keywords

light

electrical signal

light emitting

lens

light receiving

Prior art date

1988-05-30

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

• 238000001514 detection method Methods 0.000 claims description 2
• 238000012544 monitoring process Methods 0.000 claims description 2
• 230000006866 deterioration Effects 0.000 claims 1
• 230000003287 optical effect Effects 0.000 claims 1
• 238000004092 self-diagnosis Methods 0.000 claims 1
• 238000010586 diagram Methods 0.000 description 1