Radiant energy – Infrared-to-visible imaging – Including detector array
Patent
1993-09-10
1995-04-04
Hannaher, Constantine
Radiant energy
Infrared-to-visible imaging
Including detector array
2502012, 2502014, 250334, 250347, 354404, G03B 300
Patent
active
054040132
ABSTRACT:
An infrared imaging system comprises an optical system for forming an image of a target on an infrared detection array and an automatic focusing mechanism, wherein an output image signal of the infrared detection array is processed in a filter to extract high frequency components therefrom, The automatic focusing mechanism controls the optical system such that the high frequency components in the image signal is enhanced, In order to detect the maximum enhancement of the high frequency components, the high frequency components for the present moment and those for a past moment are compared while driving the automatic focusing mechanism, Further, the infrared imaging system is equipped with a predictive focusing control system that detects a moving speed of the target and activates the automatic focusing mechanism in advance when the moving speed of the target is fast.
REFERENCES:
patent: 4672439 (1987-06-01), Florence et al.
patent: 4696558 (1987-09-01), Karasaki et al.
patent: 4835561 (1989-05-01), Matsui
patent: 5140416 (1992-08-01), Tinkler
patent: 5264930 (1993-11-01), Florence et al.
Fujitsu Limited
Hannaher Constantine
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