Radiant energy – Photocells; circuits and apparatus – Photocell controls its own optical systems
Patent
1985-07-10
1987-06-09
Nelms, David C.
Radiant energy
Photocells; circuits and apparatus
Photocell controls its own optical systems
372 29, 372 31, G01J 132, H01S 313
Patent
active
046721924
ABSTRACT:
Laser beam noise reducing apparatus includes an acoustooptic cell which receives a noisy input laser light beam and produces an undiffracted or zero-order light beam and a diffracted beam in response to an RF signal at a predetermined frequency. The zero-order beam is applied to a utilization device which produces an information modulated output beam at an image zone. The zero-order beam at the output of the acoustooptic cell is sampled and AC and DC component signals are produced which are functions of fast and slow time varying changes, respectively, in the intensity of the zero-order beam. The output beam from the utilization device is sampled when it is unmodulated and a DC reference signal which represents the intensity of the DC component at the image zone is produced. The AC and DC component signals and the reference signal are combined and used to control the amplitude of the RF signal to reduce noise in the beam at the image zone.
REFERENCES:
patent: 4071751 (1978-01-01), Waksberg
patent: 4114180 (1978-09-01), Kayanuma
patent: 4123780 (1978-10-01), Honjo
patent: 4162398 (1979-07-01), Kayanuma
patent: 4221960 (1980-09-01), Maeda et al.
patent: 4433235 (1984-02-01), Akiyama et al.
patent: 4535431 (1985-08-01), Bricot et al.
patent: 4547664 (1985-10-01), Vogt et al.
Alentsev et al, "Acoustooptic Power Stabilizer for a Continuous Laser Beam", 2353 Measurement Techniques, vol. 24, No. 8, Aug. 1981, pp. 649-650.
Muka Edward
Woo Nea Yea
Eastman Kodak Company
Nelms David C.
Schaper Donald D.
Wieland Charles
LandOfFree
Laser light beam noise reducing apparatus does not yet have a rating. At this time, there are no reviews or comments for this patent.
If you have personal experience with Laser light beam noise reducing apparatus, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Laser light beam noise reducing apparatus will most certainly appreciate the feedback.
Profile ID: LFUS-PAI-O-1830292