Retroreflective scan module for electro-optical readers
First Claim
Patent Images
1. A wireless communications module, comprising:
- a) a support having a base lying in a first plane;
b) a data acquisition system including a light source on the base for directing a light beam at an indicium for reflection therefrom, and a light detector on the support for detecting light reflected from the indicium and for generating an electrical signal corresponding to the indicium;
c) a first printed circuit board on the support and lying in a second plane generally orthogonal to the first plane;
d) drive circuitry on the first printed circuit board for driving the light source;
e) a second printed circuit board on the support and lying in a third plane generally orthogonal to the second plane and generally parallel to the first plane;
f) signal processing circuitry on the second printed circuit board for processing the electrical signal to obtain a processed signal; and
g) transmitter circuitry on the second printed circuit board for transmitting the processed signal at radio frequency away from the support.
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Abstract
An electro-optical, retroreflective scanning module has a base, a first circuit board, and a second circuit board mounted orthogonal to the first circuit board. The base supports a light emitter for producing a scanning beam. The beam reflects off a generally planar scan mirror affixed to a stationary concave collection mirror, to a reflector mounted on a drive for oscillation. A detector included in the module senses light reflected from an indicia scanned by the beam. The reflected light is reflected off the reflector and directed to the collection mirror before reaching the detector. The beam and the field of view of the detector are simultaneously scanned.
47 Citations
16 Claims
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1. A wireless communications module, comprising:
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a) a support having a base lying in a first plane;
b) a data acquisition system including a light source on the base for directing a light beam at an indicium for reflection therefrom, and a light detector on the support for detecting light reflected from the indicium and for generating an electrical signal corresponding to the indicium;
c) a first printed circuit board on the support and lying in a second plane generally orthogonal to the first plane;
d) drive circuitry on the first printed circuit board for driving the light source;
e) a second printed circuit board on the support and lying in a third plane generally orthogonal to the second plane and generally parallel to the first plane;
f) signal processing circuitry on the second printed circuit board for processing the electrical signal to obtain a processed signal; and
g) transmitter circuitry on the second printed circuit board for transmitting the processed signal at radio frequency away from the support. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8)
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9. A mobile data collection terminal, comprising:
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A) a housing supported by a user; and
B) a wireless communications module in the housing, including a) a support having a base lying in a first plane;
b) a data acquisition system including a light source on the base for directing a light beam at an indicium for reflection therefrom, and a light detector on the support for detecting light reflected from the indicium and for generating an electrical signal corresponding to the indicium;
c) a first printed circuit board on the support and lying in a second plane generally orthogonal to the first plane;
d) drive circuitry on the first printed circuit board for driving the light source;
e) a second printed circuit board on the support and lying in a third plane generally orthogonal to the second plane and generally parallel to the first plane;
f) signal processing circuitry on the second printed circuit board for processing the electrical signal to obtain a processed signal; and
g) transmitter circuitry on the second printed circuit board for transmitting the processed signal at radio frequency away from the support. - View Dependent Claims (10, 11, 12, 13, 14, 15, 16)
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Specification