Optical transmission device

Details Optical transmission device Optical transmission device

2008-04-29

2008-04-29

Nguyen, Chanh D. (Department: 2629)

Optical communications

Optical communication over freee space

Transceivers

C398S201000, C359S259000

Reexamination Certificate

active

10808022

ABSTRACT:
An optical transmission device for providing stable communication with a partner device by reducing errors in optical axis misalignment. Such errors are caused by uneven distribution of the light intensity in a received light beam resulting from atmospheric microscopic fluctuations. A cross pattern filter having at least two cross patterns is used at a partner transmission device side with respect to an incident direction detecting means, and arranged so that a cross pattern generated on the position detecting photodetector by the cross pattern filter and parting lines for dividing a position detecting photodetector do not overlap with each other, but intersect with each other.

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