Optical assembly for barcode scanner
First Claim
1. A method for constructing an optical assembly for use in an optical reader having a receive optical axis, comprising the steps of:
- providing a support frame having a rear housing containing a solid state imager;
disposing a first light unit and a second light unit on the support frame on either side of the receive optical axis;
providing a first field stop optically forward of the first light unit and a second field stop optically forward of the second light unit; and
, providing a single piece optical element having a center aperture centered on the receive optical axis of the optical reader on said support frame so that the single piece optical element is disposed optically forward of the first field stop and the second field stop.
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Abstract
The invention is optical assembly for use in a barcode reader that includes a frame having a rear housing and a pair of arms outwardly extended from the housing. An optical card containing an imaging lens is slidably received in a rear guideway situated between the arms. An aperture card is slidably received in a front guideway situated between the arms in front of the lens. Lamp support brackets are also mounted to either side of the arms. Each bracket contains a pair of LEDs that are aligned in coplanar relation with the imaging lens. A cylindrical lens is mounted in front of the lamp support brackets within the arms of the frame to magnify and focus the illumination from the LED upon a target in barcode space. A horizontally extended field stop aperture is positioned in front of each LED.
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Citations
20 Claims
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1. A method for constructing an optical assembly for use in an optical reader having a receive optical axis, comprising the steps of:
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providing a support frame having a rear housing containing a solid state imager;
disposing a first light unit and a second light unit on the support frame on either side of the receive optical axis;
providing a first field stop optically forward of the first light unit and a second field stop optically forward of the second light unit; and
,providing a single piece optical element having a center aperture centered on the receive optical axis of the optical reader on said support frame so that the single piece optical element is disposed optically forward of the first field stop and the second field stop. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12)
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13. A method of constructing an optical assembly for use in an optical reader comprising the steps of:
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providing a frame;
disposing a plurality of clips on said frame;
inserting a plurality of lamps into said plurality of clips;
disposing a field stop optically forward of each lamp; and
disposing a single piece optical element having a center aperture centered on a receive optical axis of the optical reader on said support frame so that the single piece optical element is disposed optically forward of the first field stop and the second field stop. - View Dependent Claims (14, 15, 16, 17, 18)
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19. A method of constructing an optical assembly for use in an optical reader for reading a target, comprising the steps of:
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providing an imager assembly including an imager;
disposing the imager assembly on a frame;
disposing at least one optical element having an aperture optically forward of said imager assembly, so that light passes optically undisturbed from the target to the imager assembly. - View Dependent Claims (20)
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Specification