Image forming apparatus

Details Image forming apparatus Image forming apparatus

1979-02-05

1981-03-10

Willis, Davis L.

Radiant energy

Infrared-to-visible imaging

Including detector array

250334, H01J 3149

Patent

active

042556589

ABSTRACT:
The imager comprises an array 4 of detectors, and an array 6 of LEDs each detector being connected to a corresponding LED by a respective signal processing channel 5a. Common to all the channels is a ramp generator 12. Each channel has a comparator 9 which compares the ramp with the signal from its detector to produce a pulse width modulated signal for its LED. Thus the LED is always driven at the same point on its characteristic, variation of brightness being achieved by variation of pulse width. Use of a common ramp generator makes for simple change of ramp shape, temperature window, offset and .gamma. law by simply changing only the ramp generator.

REFERENCES:
patent: 3685048 (1972-08-01), Pincus
patent: 3742238 (1973-06-01), Hoffman
patent: 3786269 (1974-01-01), Cooper
patent: 3812357 (1974-05-01), Flogaus et al.
patent: 3949225 (1976-04-01), Aguilera
Higham et al, Thermal Imager Using Ceramic Pyroelectric Detectors, International Conference on Low Light and Thermal Imaging Systems, Institution of Electrical Engineers, London, Mar. 3-5, 1975, pp. 207-211.

Affiliated with

Also associated with

Rating

Image forming 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 Image forming apparatus, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Image forming apparatus will most certainly appreciate the feedback.

Rate now

Comments { 0 }

Profile ID: LFUS-PAI-O-1295917