Binary alignment corrector

Details Binary alignment corrector Binary alignment corrector

1990-12-24

1991-11-19

Sikes, William L.

Optical: systems and elements

Diffraction

From grating

372 97, 359566, G02B 518

Patent

active

050661000

ABSTRACT:
There is provided by this invention a binary alignment corrector for correcting the directional errors caused by non-linear placement or "bowing" of diodes within laser arrays. The binary alignment corrector is an array of diffraction gratings with each diffraction grating corresponding to an individual diode of the laser array. Based on the amount of angular misalignment for a particular laser diode, the grating period of its corresponding diffraction grating is calculated. The binary alignment corrector is then fabricated by very large scale integration techniques such that each individual diffraction grating of the binary alignment corrector has a grating period sufficient to properly align its corresponding laser diode. Furthermore, a bias angle may be introduced in the alignment of each laser diode so that laser diodes which are only slightly misaligned may also be corrected.

REFERENCES:
patent: 3980389 (1976-09-01), Huignard et al.
patent: 4649351 (1987-03-01), Veldkamp et al.
patent: 4862467 (1989-08-01), Carter et al.
patent: 4933649 (1990-06-01), Swanson et al.
patent: 4971415 (1990-11-01), Hara et al.

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