Radiant energy – Photocells; circuits and apparatus – Optical or pre-photocell system
Patent
1993-03-17
1994-06-28
Nelms, David C.
Radiant energy
Photocells; circuits and apparatus
Optical or pre-photocell system
25022724, G01N 2186
Patent
active
053249542
ABSTRACT:
Systems for adjusting and evaluating the positional relationship between a light-receiving element and an optical fiber optically coupled thereto. The light-receiving element comprising a lens and a light-receiving portion with an electrode surface is a back incidence type having the lens located on the side opposite to the electrode surface of the light-receiving portion. The adjusting system scans the optical fiber with respect to the light-receiving element in order to obtain the intensity distribution of reflected feedback light from the electrode surface in the fiber scanning direction. The system then finds a region where the measured intensity increases in the intensity distribution and obtains the positional relationship between optical fiber and light-receiving element based on that region. The relationship thus obtained provides the basis for allowing the system to displace at least one of the optical fiber and light-receiving element so as to attain a necessary positional relationship therebetween.
REFERENCES:
patent: 4664732 (1987-05-01), Campbell et al.
Fujitsu Limited
Nelms David C.
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