Drift tracking in an electro-optic light modulator

Details Drift tracking in an electro-optic light modulator Drift tracking in an electro-optic light modulator

1990-12-24

1992-09-22

Nelms, David C.

Radiant energy

Photocells; circuits and apparatus

Photocell controls its own optical systems

250225, 359323, G01J 132

Patent

active

051499533

ABSTRACT:
Compensation for space charge build-up in an electro-optic modulator device is realized by recurrently recalibrating the device. During each recalibration interval, light transmitted through the device is intercepted and converted to an electric signal which is compared to a test signal of a magnitude corresponding to light of an intensity that would be transmitted through the device in the absence of space charge. The difference between the respective magnitudes of the test signal and the electric signal serves as a bias to supplement the normal modulating drive signal until the time of next recalibration. Recurrently, but at a rate lower than the recalibration rate, the device is short circuited, while flooded with light, to eliminate space charge build-up.

REFERENCES:
patent: 3609381 (1971-09-01), Hartfield
patent: 3780296 (1973-12-01), Waksberg et al.
patent: 4369457 (1983-01-01), Sprague
patent: 4631551 (1986-12-01), Vergona
patent: 4667256 (1987-05-01), Vergona

Affiliated with

Also associated with

Rating

Drift tracking in an electro-optic light modulator does not yet have a rating. At this time, there are no reviews or comments for this patent.

If you have personal experience with Drift tracking in an electro-optic light modulator, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Drift tracking in an electro-optic light modulator will most certainly appreciate the feedback.

Rate now

Comments { 0 }

Profile ID: LFUS-PAI-O-1070653