Stabilized fluorescent lamp for a document scanning system

Details Stabilized fluorescent lamp for a document scanning system Stabilized fluorescent lamp for a document scanning system

1990-09-28

1991-07-02

Hix, L. T.

Photocopying

Projection printing and copying cameras

With temperature or foreign particle control

355 69, G03B 2752, G03B 2772

Patent

active

050293117

ABSTRACT:
A fluorescent lamp utilized in a document scanning system is environmentally and thermally stabilized by means of a bifurcated heater control assembly. A heater blanket is wrapped around the entire surface of the lamp including the end areas surrounding the filaments but exclusive of the aperture through which light is emitted. The size and temperature of the lamp cold spot are selected emperically to maximize output power and minimize illumination transients during power on. The heater jacket has thermostat control set points, which, in both the lamp standby and energized states, maintain the blanket and lamp assembly at a constant elevated temperature which is above that achieved by lamp heat alone. Since the temperature distribution is always determined by the blanket and never by the lamp, changes in temperature or temperature distribution (and hence illumination distribution) as the lamp transitions from standby to full on are minimized.

REFERENCES:
patent: 4751551 (1988-06-01), Beiter et al.
patent: 4827313 (1989-05-01), Corona

Affiliated with

Also associated with

Rating

Stabilized fluorescent lamp for a document scanning 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 Stabilized fluorescent lamp for a document scanning system, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Stabilized fluorescent lamp for a document scanning system will most certainly appreciate the feedback.

Rate now

Comments { 0 }

Profile ID: LFUS-PAI-O-1254476