Focus module and components with actuator
First Claim
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1. A portable data collection device comprising:
- an illumination source for illuminating a target with a light source;
a focus module capturing light from the light source reflecting from the target, the focus module comprising,a boundary element;
a focus membrane; and
a focus fluid entrapped between said boundary element and said focus membrane;
a deforming element in communication with said focus module; and
a lens controller coupled to the deforming element,wherein the lens controller provides a control signal to the deforming element so as to vary a force applied by the deforming element to said focus membrane, wherein the deforming element comprises a ring shaped structure that supports a plurality of tabs that extend inward from the ring shaped structure, the plurality of tabs curling in the direction of the focus membrane to change a curvature of the focus membrane when the deforming element is activated.
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Abstract
A focus module containing a boundary element and a focus element. The focus element includes a fluid and a deformable membrane, with the fluid being entrapped between the boundary element and the deformable membrane. The focus module also includes a pressure element, which is capable of deforming the focus element by pressing on the deformable membrane in the direction of the boundary element.
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Citations
17 Claims
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1. A portable data collection device comprising:
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an illumination source for illuminating a target with a light source; a focus module capturing light from the light source reflecting from the target, the focus module comprising, a boundary element; a focus membrane; and a focus fluid entrapped between said boundary element and said focus membrane; a deforming element in communication with said focus module; and a lens controller coupled to the deforming element, wherein the lens controller provides a control signal to the deforming element so as to vary a force applied by the deforming element to said focus membrane, wherein the deforming element comprises a ring shaped structure that supports a plurality of tabs that extend inward from the ring shaped structure, the plurality of tabs curling in the direction of the focus membrane to change a curvature of the focus membrane when the deforming element is activated. - View Dependent Claims (2)
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3. A portable data collection device for imaging a target at an object distance from said device, the object distance comprising a first object distance and a second object distance that is different from the first object distance, said portable data collection device comprising:
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an illumination source for illuminating the target with a light source; a variable focus module capturing light from the light source reflecting from the target, the variable focus module comprising a boundary element and a focus membrane communicating with said boundary element in a manner forming a fluid chamber defining an optical axis, the fluid chamber having a focus fluid disposed therein; a deforming element in communication with said focus module, wherein the deforming element comprises a ring shaped structure that supports a plurality of tabs that extend inward from the ring shaped structure, the plurality of tabs curling in the direction of the focus membrane to change a curvature of the focus membrane when the deforming element is activated; and a lens controller coupled to the deforming element, the lens controller providing a control signal to said deforming element in a manner varying a force applied by said deforming element on said focus membrane in a direction parallel to the optical axis, the force adapting the focus membrane for the first object distance and the second object distance. - View Dependent Claims (4, 5, 6, 7, 8)
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9. A for imaging a target at an object distance, said reader comprising:
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an illumination assembly comprising a light source for illuminating the target with light; an imaging assembly responsive to the light reflected by the target from the light source; a variable focus module conveying the reflected light to the imaging assembly, the variable focus module comprising a focus element having an optical axis, and a deforming element communicating with the focus element, the deforming element comprising a ring shaped structure that supports a plurality of tabs that extend inward from the ring shaped structure, the plurality of tabs curling in the direction of the focus membrane to change a curvature of the focus membrane when the deforming element is activated; and a control element coupled to the variable focus module, the control element comprising a lens controller providing a control signal to said deforming element in a manner varying a force applied by said deforming element along the optical axis of the focus element in the direction of a boundary element, wherein the object distance comprises a first object distance and a second object distance that is at least about 20 cm from the first object distance, and the force adapts the focus module so as to accommodate the first object distance and the second object distance, and wherein said reader is adapted to be hand held. - View Dependent Claims (10, 11)
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12. An optical system for a data reader configured for decoding an encoded indicia on a target located an object distance from the data reader, the object distance comprising a first object distance and a second object distance that is different from the first object distance, said optical system comprising:
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an illumination assembly comprising a light source for illuminating a target with light; an imaging assembly responsive to the light reflected by the target from the light source; a liquid lens conveying the reflected light to the imaging assembly, the liquid lens comprising a boundary element and a deformable membrane communicating with said boundary element in a manner forming a fluid chamber having an optical axis, the fluid chamber having a focus fluid disposed therein; a deforming element adjacent the fluid chamber, wherein the deforming element comprises a ring shaped structure that supports a plurality of tabs that extend inward from the ring shaped structure, the plurality of tabs curling in the direction of the focus membrane to change a curvature of the focus membrane when the deforming element is activated; a control element coupled to the deforming element, the control element comprising a lens controller providing a control signal to the deforming element deforming the deforming element relative to the fluid chamber in a manner accommodating the first object distance and the second object distance, wherein the difference between the first object distance and the second object distance is at least about 20 cm. - View Dependent Claims (13, 14, 15, 16, 17)
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Specification