Imaging reader and method with internal window reflections directed away from imager
First Claim
Patent Images
1. A reader for electro-optically reading a target, comprising:
- a) a housing having a window; and
b) a solid-state imager in the housing and including an array of image sensors for capturing target light through the window from the target over a field of view;
c) an illuminator in the housing for directing illumination light to and through the window to illuminate the target during reading, a portion of the illumination light incident on the window being reflected therefrom into the housing away from the window; and
d) the window being configured as a non-planar optical element for redirecting the reflected portion of the illumination light away from the imager to enhance reader performance.
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Accused Products
Abstract
A target is illuminated with illumination light for image capture by a solid-state imager of an imaging reader. Internal reflections of the illumination light at a window are minimized, if not eliminated, by configuring the window as a non-planar optical element operative for redirecting the internal reflections away from the imager to enhance reader performance.
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Citations
17 Claims
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1. A reader for electro-optically reading a target, comprising:
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a) a housing having a window; and
b) a solid-state imager in the housing and including an array of image sensors for capturing target light through the window from the target over a field of view;
c) an illuminator in the housing for directing illumination light to and through the window to illuminate the target during reading, a portion of the illumination light incident on the window being reflected therefrom into the housing away from the window; and
d) the window being configured as a non-planar optical element for redirecting the reflected portion of the illumination light away from the imager to enhance reader performance. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10)
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11. A method of electro-optically reading a target, comprising the steps of:
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a) mounting a window on a housing of an electro-optical reader;
b) capturing target light with an array of image sensors of a solid-state imager through the window from the target over a field of view;
c) illuminating the target during reading by directing illumination light to and through the window, a portion of the illumination light incident on the window being reflected therefrom into the housing away from the window; and
d) configuring the window as a non-planar optical element for redirecting the reflected portion of the illumination light away from the imager to enhance reader performance. - View Dependent Claims (12, 13, 14, 15, 16, 17)
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Specification