Two-dimensional part reader having a focussing guide
First Claim
1. A hand held optical reader comprising:
- a housing;
a lens assembly attached to said housing, said lens assembly having, an optical axis, and depth of field;
an imaging assembly mounted to said housing in image receiving relationship to said lens assembly;
a guide disposed on a front portion of said housing for establishing a distance between said lens assembly and an equipment target that is displaced a predetermined distance from a mark target, said guide having a proximal end adapted to be mounted on said housing, and a distal end adapted to contact the equipment target;
wherein the length of said guide is such that the positioning of said distal end on said equipment target assures that said mark target is within said depth of field of said lens assembly.
1 Assignment
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Accused Products
Abstract
An optical reader is suitable for reading 2-dimensional indicia. The optical reading device, that may include a bar code reader, comprises a guide whose length along the optical reader optical axis is such that when that guide contacts the part or equipment surrounding the indicia to be read, that indicia is within the optical reader depth of field. The reader comprises a housing having therein a source of illumination and optics for producing a diverging beam for illuminating indica. A spacing element transparent guide is removably attached to the housing, and does not block indicia. The line of contact of the guide with the data carrier is substantially fully visible to the operator, who can thus confirm that the guide is in proper operating position relative to the indica prior to initiating a reading operation. A reading operation can be initiated by pressing on the guide to actuate a switch, or on a manual trigger.
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Citations
24 Claims
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1. A hand held optical reader comprising:
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a housing; a lens assembly attached to said housing, said lens assembly having, an optical axis, and depth of field; an imaging assembly mounted to said housing in image receiving relationship to said lens assembly; a guide disposed on a front portion of said housing for establishing a distance between said lens assembly and an equipment target that is displaced a predetermined distance from a mark target, said guide having a proximal end adapted to be mounted on said housing, and a distal end adapted to contact the equipment target; wherein the length of said guide is such that the positioning of said distal end on said equipment target assures that said mark target is within said depth of field of said lens assembly. - View Dependent Claims (2, 3, 4, 5, 6, 7)
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8. A hand held optical reader comprising:
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a housing; a lens assembly attached to said housing, said lens assembly having optical axis, and a depth of field; a 2-dimensional (2D) image sensor mounted within said housing in image receiving relationship to said assembly; a guide disposed on a front portion of said housing for establishing a distance between said lens assembly and a 2-dimensional (2D) indicia positioned on a substrate, said guide having a proximal end adapted to be mounted on said housing, and a distal end adapted to contact said substrate; whereby the positioning of said distal end on said substrate assures that said indicia is within said depth of field of said lens assembly. - View Dependent Claims (9, 10, 11, 12, 13, 14, 15, 16)
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17. A hand held optical reader for reading a 2D indicia comprising:
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a housing; a lens assembly attached to said housing, said lens assembly having, an optical axis, and a depth of field; a matrix image sensor image sensor within said housing in image receiving relationship to said assembly; a guide disposed on a front portion of said housing for establishing a distance between said lens assembly and an equipment target that is displaced a predetermined distance from a mark target, said guide having a proximal end adapted to be mounted on said housing, a distal end adapted to contact with the equipment target, and a predetermined distance along the projection of the guide on the optical axis; whereby the positioning of said distal end on said equipment target assures that said mark target is within said depth of field of said lens assembly. - View Dependent Claims (18, 19, 20, 21, 22, 23, 24)
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Specification