Optical reader comprising multiple color illumination
DCFirst Claim
1. An optical reader imaging module comprising:
- a first circuit board carrying a two dimensional image sensor;
a second circuit board spaced forwardly of said first circuit board;
a support assembly at least partially interposed between said firs circuit board and said second circuit board;
an aiming system for projecting an aiming line comprising aiming LEDs, said aiming LEDs being mounted on said first circuit board;
an illumination system for projecting a substantially uniform illumination pattern on a target area, said is illumination system comprising illumination LEDs mounted on said second circuit board;
wherein said aiming LEDs are selected to emit light in a different visible color relative to a visible color emitted by said illumination LEDs so that said aiming pattern is in color contrast relative to said illumination pattern.
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Abstract
An imaging module in one embodiment includes at least one multiple color emitting light source comprising a plurality of different colored LED dies each independently driveable so that the overall color emitted by the light source can be controlled and varied. The multiple color emitting light source can be controlled so that the color emitted by the light source is optimized for imaging or reading in a present application environment of the module. Further, the module can be configured so that control of the multiple color emitting light source automatically varies depending on a sensed condition, such a color present in a field of view of the module, the distance of the module to a target, and/or a predetermined criteria being met so that feedback is provided to a user. The module in a further aspect can include illumination light sources and aiming light sources which project light in different wavelength emission bands.
894 Citations
6 Claims
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1. An optical reader imaging module comprising:
- a first circuit board carrying a two dimensional image sensor;
a second circuit board spaced forwardly of said first circuit board;
a support assembly at least partially interposed between said firs circuit board and said second circuit board;
an aiming system for projecting an aiming line comprising aiming LEDs, said aiming LEDs being mounted on said first circuit board;
an illumination system for projecting a substantially uniform illumination pattern on a target area, said is illumination system comprising illumination LEDs mounted on said second circuit board;
wherein said aiming LEDs are selected to emit light in a different visible color relative to a visible color emitted by said illumination LEDs so that said aiming pattern is in color contrast relative to said illumination pattern. - View Dependent Claims (2, 3, 4, 5, 6)
- a first circuit board carrying a two dimensional image sensor;
Specification