Bioptic barcode reader
An example bioptic barcode reader includes an imaging assembly, first illumination assembly, and second illumination assembly. No more than 10% of a light source of the second illumination assembly is visible within a boundary of a first imaging FOV of the imaging assembly. No more than 10% of a first mirror is visible within a boundary of a second imaging FOV of the imaging assembly. An upper edge of an aperture in an upper housing portion is outside a boundary of a first illumination FOV of the first illumination assembly. All or substantially all light rays from the second illumination assembly that pass through a horizontal window in a lower housing portion form respective angles relative to horizontal that are equal to or less than a second angle formed between a normal line of the first mirror and horizontal.
1. A bioptic barcode reader, comprising:
a housing having a lower housing portion with an upper surface facing a product scanning region and an upper housing portion extending above the lower housing portion;
a generally horizontal window positioned at the upper surface of the lower housing portion;
a generally upright window positioned in an aperture in the upper housing portion;
an imaging assembly positioned within the housing, the imaging assembly having a first imaging field-of-view (FOV) that is directed toward the horizontal widow and a second imaging FOV that is directed towards the upright window;
a first mirror positioned within the housing and configured to reflect the first imaging FOV towards the horizontal window;
a first illumination assembly having a first illumination FOV that is directed towards the horizontal window; and
a second illumination assembly having a second illumination FOV that is directed towards the upright window; wherein
no more than 10 percent of a light source of the second illumination assembly is visible within a boundary of the first imaging FOV;
no more than 10 percent of the first mirror is visible within a boundary of the second imaging FOV;
an upper edge of the aperture in the upper housing portion is outside a boundary of the first illumination FOV; and
all or substantially all light rays from the second illumination assembly that pass through the horizontal window, and are not reflected within the horizontal window or off of an object, form respective angles relative to horizontal that are equal to or less than a second angle formed between a normal line of the first mirror and horizontal.
2. The bioptic barcode reader of claim 1 , wherein the light source of the second illumination assembly is outside the boundary of the first imaging FOV.
3. The bioptic barcode reader of claim 1 , wherein the first mirror is outside the boundary of the second imaging FOV.
4. The bioptic barcode reader of claim 1 , wherein a first central axis of the first imaging FOV that is directed towards the horizontal window is tilted toward the upper housing portion at a first angle from vertical that is greater than zero.
5. The bioptic barcode reader of claim 4 , wherein: an outer edge of the first imaging FOV that is directed towards the horizontal window forms a second angle from vertical that is greater than or equal to zero degrees and less than or equal to 10 degrees towards the upper housing portion; and an inner edge of the first imaging FOV that is directed towards the horizontal window forms a third angle from vertical that is greater than or equal to 20 degrees and less than or equal to 25 degrees towards the upper housing portion.
6. The bioptic barcode reader of claim 1 , wherein the first illumination FOV that is directed towards the horizontal window overlaps with the first imaging FOV that is directed towards the horizontal window by at least 80% between the horizontal window and a top of the upper housing portion.
7. The bioptic barcode reader of claim 1 , wherein a bottom edge of the second imaging FOV directed towards the upright window forms a fourth angle below horizontal that is greater than or equal to zero degrees and less than or equal to 25 degrees.
8. The bioptic barcode reader of claim 1 , wherein a width of the horizontal window is greater than a length of the horizontal window.
9. The bioptic barcode reader of claim 1 , wherein an inner edge of the horizontal window is horizontally spaced from a front edge of the upper housing portion by a distance that is greater than or equal to 2 inches and less than or equal to 3 inches.
10. The bioptic barcode reader of claim 1 , wherein the imaging assembly includes an image sensor having a sensor FOV and the bioptic barcode reader comprises:
a second mirror positioned within the housing and configured to redirect the second imaging FOV towards the upright window; and
a splitter mirror positioned within the housing and configured to split the sensor FOV into the first imaging FOV and the second imaging FOV and redirect the second imaging FOV towards the second mirror.
11. The bioptic barcode reader of claim 10 , wherein:
the splitter mirror is configured to split the second imaging FOV into a third imaging FOV and a fourth imaging FOV;
the second mirror is configured to redirect the third imaging FOV towards the upright window;
the bioptic barcode reader includes a third mirror positioned within the housing and configured to reflect the fourth imaging FOV towards the upright window; and
no more than 10 percent of the first mirror is visible within a boundary of the third imaging FOV directed towards the upright window and within a boundary of the fourth imaging FOV directed towards the upright window.
12. The bioptic barcode reader of claim 11 , wherein the first mirror is not visible within the boundary of the third imaging FOV directed towards the upright window or within the boundary of the fourth imaging FOV directed towards the upright window.
13. The bioptic barcode reader of claim 11 , wherein a bottom edge of the third imaging FOV directed towards the upright window forms a fifth angle below horizontal that is greater than or equal to zero degrees and less than or equal to 25 degrees.
14. The bioptic barcode reader of claim 13 , wherein a bottom edge of the fourth imaging FOV directed towards the upright window forms a sixth angle below horizontal that is greater than or equal to zero degrees and less than or equal to 25 degrees.
15. The bioptic barcode reader of claim 1 , wherein:
the imaging assembly comprises a first image sensor including the first imaging FOV and a second image sensor including the second imaging FOV;
the first mirror is configured to redirect the first imaging FOV towards the horizontal window; and
the bioptic barcode reader comprises a second mirror positioned within the housing and configured to redirect the second imaging FOV towards the upright window.
16. The bioptic barcode reader of claim 15 , wherein the first image sensor and the second image sensor are both mounted on a common printed circuit board.
17. The bioptic barcode reader of claim 15 , wherein:
the bioptic barcode reader comprises a splitter mirror that is configured to split the second imaging FOV into a third imaging FOV and a fourth imaging FOV, reflect the third imaging FOV towards the second mirror, and reflect the fourth imaging FOV towards a third mirror that is positioned within the housing and configured to reflect the fourth imaging FOV towards the upright window; and
no more than 10 percent of the first mirror is visible within a boundary of the third imaging FOV directed towards the upright window and within a boundary of the fourth imaging FOV directed towards the upright window.
18. The bioptic barcode reader of claim 17 , wherein the first mirror is not visible within the boundary of the third imaging FOV directed towards the upright window or within the boundary of the fourth imaging FOV directed towards the upright window.
19. The bioptic barcode reader of claim 17 , wherein a bottom edge of the third imaging FOV directed towards the upright window forms a fifth angle below horizontal that is greater than or equal to zero degrees and less than or equal to 25 degrees.
20. The bioptic barcode reader of claim 19 , wherein a bottom edge of the fourth imaging FOV directed towards the upright window forms a sixth angle below horizontal that is greater than or equal to zero degrees and less than or equal to 25 degrees.