Classifying – separating – and assorting solids – Sorting special items – and certain methods and apparatus for... – Condition responsive means controls separating means
Patent
1995-05-15
1997-04-08
Bollinger, David H.
Classifying, separating, and assorting solids
Sorting special items, and certain methods and apparatus for...
Condition responsive means controls separating means
209573, B07C 5344
Patent
active
056179570
ABSTRACT:
It is an object to provide a method of sorting semiconductor lasers, capable of appropriately removing semiconductor lasers which can cause a so-called sudden death in use. After a first current within a range of 50 to 150% the maximum rated current is supplied to the semiconductor lasers for a predetermined period of time, a second current is supplied within a range of 120 to 250% the maximum rated current for a short period of time. Semiconductor lasers which are destroyed or degraded in output characteristics are removed as defective devices.
REFERENCES:
patent: 5116767 (1992-05-01), Dechiaro et al.
patent: 5446537 (1995-08-01), Yoshida et al.
Hashimoto Jun-Ichi
Katsuyama Tsukuru
Yoshida Ichiro
Bollinger David H.
Sumitomo Electric Industries Ltd.
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