Radiant energy – Photocells; circuits and apparatus – Photocell controls its own optical systems
Patent
1993-09-08
1995-03-07
Nelms, David C.
Radiant energy
Photocells; circuits and apparatus
Photocell controls its own optical systems
382 43, G01J 120
Patent
active
053960572
ABSTRACT:
A method of optimizing the optical focus of an electro-optical sensor in preparation for accurately measuring an optical parameter thereof of the type including, but not limited to, dynamic range, modulation transfer function, minimum resolvable temperature difference and field of view, includes changing a focus of the sensor on a target image viewed by the sensor while obtaining successive output images produced by the sensor, constructing respective image vectors from respective ones of the output images, for each one of the image vectors transforming the image vector by transform to produce a transformed image vector of elements whose values correspond to spatial frequency content computing a sum of squares of elements of the transformed image vector to produce a focus metric and identifying the focus of the recorded image corresponding to the greatest focus metric as being the optimum focus.
REFERENCES:
patent: 3981443 (1976-09-01), Lynch et al.
patent: 4242733 (1980-12-01), Deal
patent: 4242734 (1980-12-01), Deal
patent: 4261043 (1981-04-01), Robinson et al.
patent: 4306143 (1981-12-01), Utagawa et al.
patent: 4843413 (1989-06-01), Walther
patent: 4965443 (1990-10-01), Yamasaki et al.
patent: 5003165 (1991-03-01), Sarfati et al.
patent: 5073964 (1991-12-01), Resnikoff
patent: 5144122 (1992-09-01), Danley et al.
patent: 5295203 (1994-03-01), Krause et al.
Anderson Terry J.
Hoch Jr. Karl J.
Le Que T.
Nelms David C.
Northrop Grumman Corporation
LandOfFree
Method for optimum focusing of electro-optical sensors for testi does not yet have a rating. At this time, there are no reviews or comments for this patent.
If you have personal experience with Method for optimum focusing of electro-optical sensors for testi, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Method for optimum focusing of electro-optical sensors for testi will most certainly appreciate the feedback.
Profile ID: LFUS-PAI-O-1407723