Exposure controlled imaging system

Details Exposure controlled imaging system Exposure controlled imaging system

1989-02-07

1990-10-09

Reinhart, Mark J.

Recorders

Performance of multiple functions of steam and gas engines

Pressure responsive element

346108, 358296, G01D 900, G01D 1514, H04N 121

Patent

active

049623850

ABSTRACT:
A digital data imaging system in which the duration of each exposure pulse of a laser beam is directly locked to the speed of movement of the film. Thus the area of the film exposed during each pixel is independent of the speed of rotation of the drum. If the drum speed decreases, the exposure time is automatically increased. The rotating drum is provided with a conventional rotary encoder that produces a fixed number of signal pulses per revolution. These primary pulses are multiplied by conventional phase-locked loop technology to produce a large number of clock pulses. The duration of each clock pulse represents a fixed increment of movement of the surface of the drum that is independent of the rotational speed of the drum. These clock pulses control the timing and on-off ratio of the laser exposure pulses. By locking the timing of the laser beam exposures (equivalent to the shutter speeds in a camera) to the rotary encoder, even slight variations in the drum speed, whether caused by system factors or operator induced, appropriately change the pixel timing.

REFERENCES:
patent: 4561016 (1985-12-01), Jung et al.

Affiliated with

Also associated with

Rating

Exposure controlled imaging system does not yet have a rating. At this time, there are no reviews or comments for this patent.

If you have personal experience with Exposure controlled imaging system, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Exposure controlled imaging system will most certainly appreciate the feedback.

Rate now

Comments { 0 }

Profile ID: LFUS-PAI-O-975969