Mold number reader with field optics photodetector

Details Mold number reader with field optics photodetector Mold number reader with field optics photodetector

1987-12-10

1989-03-28

Nelms, David C.

Radiant energy

Photocells; circuits and apparatus

Optical or pre-photocell system

250556, 235464, G01N 904, G06K 710

Patent

active

048166685

ABSTRACT:
A mold number reader for detecting code marks at the heel of a transparent bottle or the like, such code marks desirable being in the form of dots or balls protruding from the bottle's heel. During rotation of the bottle, its heel portion is illuminated with a structured light source in the form of a narrow rectangle, which light is selectively reflected by code marks and collected by field-type optics. The use of a well defined light source of small area provides a high input signal level, while the field optics enjoys a high depth of field and hence decreased sensitivity to bottle placement during inspection. The light source may be a modulated laser diode and the signal processing electronics may include a demodulator to process the photodetector output signal. The use of heterodyned signal processing decreases the sensitivity to ambient light and other sources of noise in the output signal.

REFERENCES:
patent: 4175236 (1979-11-01), Juvinall
patent: 4201338 (1980-05-01), Keller
patent: 4230266 (1980-10-01), Juvinall
patent: 4713536 (1987-12-01), Williams et al.

Affiliated with

Also associated with

Rating

Mold number reader with field optics photodetector does not yet have a rating. At this time, there are no reviews or comments for this patent.

If you have personal experience with Mold number reader with field optics photodetector, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Mold number reader with field optics photodetector will most certainly appreciate the feedback.

Rate now

Comments { 0 }

Profile ID: LFUS-PAI-O-1661068