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US 6,149,061 AGranted
Optoelectronic device for multidirectional capture of images of plane objects, in particular bar codes
AssigneeIntermec IP Corp.
InventorsJean-Louis Massieu, Serge Thuries
Life of this patent
Estimating the term…
Abstract
An optoelectronic device for multidirectional capture of images, comprising a retro-collector, two independent deflectors and retro-collection means (11), whose deflection means comprise two extending along orthogonal axes and respective deflector drivers coupled to oscillate the deflectors at a specific amplitude between two positions about their axis. The optoelectronic device also includes a controller that controls the drivers so as to oscillate the deflectors at a relatively low frequency between two positions in a first mode, or at a relatively high frequency capable of stabilizing the deflectors between the two positions in a second mode.
Claims13
An optoelectronic device for multidirectional capture of images of plane objects, in particular bar codes, of the type comprising:
- a light source capable of delivering an incident light beam,
- means for deflecting the incident light beam capable of causing said beam to scan the plane objects according to predetermined scanning modes,
- an electronic sensor for image capture,
- and retro-collection means capable of allowing images to be formed on the sensor, wherein said optoelectronic device has
- deflection means comprising:
- a first mirror extending longitudinally along a first axis, positioned so as to intercept the incident beam delivered by the light source, and mounted on driving means capable of making it oscillate at a specific amplitude between two positions about the first axis,
- a second mirror extending longitudinally along second axis orthogonally to the first axis, positioned so as to intercept the beam deflected by the first mirror and to reflect it towards the plane objects, said second mirror being mounted on driving means capable of making it oscillate at a specific amplitude between two positions about the second axis,
- means for controlling the driving means capable of allowing the frequency of oscillation of said driving means to be modified, and designed to enable them to be supplied:
- either with a frequency intended to cause an oscillation of the associated mirror between its two positions, so as to obtain an oscillatory mode,
- or with a high frequency capable of substantially stabilizing the associated mirror between its two positions, by controlling, a continuous variation in the mark-space ratio of the supply, so as to obtain a position mode, wherein
- the retro-collection means are independent from the first and second mirrors.
8 more elements
An optoelectronic device for the multidirectional capturing of images of plane objects, comprising:
- a light source;
- a first light deflector extending longitudinally along a first axis and positioned to intercept an incident beam from the light source the first light deflector pivotally mounted for oscillating movement about the first axis;
- a second light deflector extending longitudinally along a second axis, differing from the first axis, and positioned to intercept the incident beam reflected from the first light deflector, the second light deflector pivotally mounted for oscillating movement about the second axis;
- a first driver coupled to the first light deflector to drive the first light deflector;
- a second driver coupled to the second light deflector to drive the second light deflector;
- a driver controller controllingly coupled to the first driver and the second driver, wherein the driver controller is configured to operate in a first mode to oscillate the first light deflector at a first frequency and a corresponding first angular displacement, and a second mode to oscillate the first light deflector at a second frequency, greater than the first frequency, and a corresponding second angular displacement substantially equal to zero;
- and
- a light collector positionable to collect light reflected by the plane objects.
5 more elements
An optoelectronic device for the multidirectional capturing of images of plane objects, comprising:
- a light source;
- a first light deflector extending longitudinally along a first axis and positioned to intercept an incident beam from the light source, the first light deflector pivotally mounted for oscillating movement about the first axis;
- a second light deflector extending longitudinally along a second axis, differing from the first axis, and positioned to intercept the incident beam reflected from the first light deflector, the second light deflector pivotally mounted for oscillating movement about the second axis;
- a first driver coupled to the first light deflector to drive the first light deflector;
- a second driver coupled to the second light deflector to drive the second light deflector;
- a driver controller controllingly coupled to the first driver and the second driver, wherein
- in a first mode, the driver controller provides a first control signal to the first driver to oscillate the first light deflector at a first non-resonance frequency to achieve a selected first angular displacement;
- and
- in a second mode, the driver controller provides a second control signal to the first driver to oscillate the first light deflector at a second frequency sufficiently greater than the first frequency to achieve a selected second angular displacement less than the first angular displacement;
- and
- a light collector positionable to collect light reflected by the plane objects.
8 more elements
An optoelectronic device for the multidirectional capturing of images of plane objects comprising:
- a light source;
- a first light deflector extending longitudinally along a first axis and positioned to intercept an incident beam from the light source, the first light deflector pivotally mounted for oscillating movement about the first axis;
- a second light deflector extending longitudinally along a second axis, differing from the first axis, and positioned to intercept the incident beam reflected from the first light deflector, the second light deflector pivotally mounted for oscillating movement about the second axis;
- a first driver coupled to the first light deflector to drive the first light deflector;
- a second driver coupled to the second light deflector to drive the second light deflector;
- a driver controller controllingly coupled to the first driver and the second driver, wherein
- in a first mode, the driver controller controls the first driver to oscillate the first light deflector at a first non-resonance frequency between a first position and a second position substantially spaced from the first position;
- and
- in a second mode, the driver controller controls the first driver to oscillate the first light deflector at a second frequency, the second frequency sufficiently high to limit the travel of the first light deflector with respect to the first mode;
- and
- a light collector positionable to collect light reflected by the plane objects.
8 more elements
A method of operating an optoelectronic device for the multidirectional capturing of images of plane objects, comprising:
- producing an incident light beam;
- pivotally oscillating a first deflector about a longitudinal axis thereof to intercept the incident light beam;
- pivotally oscillating a second deflector about a longitudinal axis thereof to intercept the incident beam deflected by the first deflector, the longitudinal axis of the second deflector being different from the longitudinal axis of the first deflector;
- and
- collecting light reflected by the plane objects with a light collector, wherein pivotally oscillating a first deflector comprises:
- in a first mode, oscillating the first deflector at a first non-resonance frequency to achieve a first angular displacement thereof between two positions;
- and
- in a second mode, oscillating the first deflector at a second frequency, the second frequency sufficiently high to limit the angular displacement of the first deflector with respect to the angular displacement of the first deflector in the first mode.
5 more elements
A method of operating an optoelectronic device for the multidirectional capturing of images of plane objects, comprising:
- producing an incident light beam;
- pivotally oscillating a first deflector about a longitudinal axis thereof to intercept the incident light beam;
- pivotally oscillating a second deflector about a longitudinal axis thereof to intercept the incident beam deflected by the first deflector, the longitudinal axis of the second deflector being different from the longitudinal axis of the first deflector;
- and
- collecting light reflected by the plane objects with a light collector, wherein pivotally oscillating a first deflector comprises:
- in a first mode, oscillating the first deflector at a first non-resonance frequency and a first angular displacement;
- and
- in a second mode, oscillating the first deflector at a second frequency, the second frequency greater than the first non-resonance frequency and the angular displacement less than the angular displacement of the first deflector in the first mode.
5 more elements
A method of operating an optoelectronic device for the multidirectional capturing of images of plane objects, comprising:
- producing an incident light beam;
- pivotally oscillating a first deflector about a longitudinal axis thereof to intercept the incident light beam;
- pivotally oscillating a second deflector about a longitudinal axis thereof to intercept the incident beam deflected by the first deflector, the longitudinal axis of the second deflector being different from the longitudinal axis of the first deflector;
- and
- collecting light reflected by the plane objects with a light collector, wherein pivotally oscillating a first deflector comprises:
- in a first mode, oscillating the first deflector at a first non-resonance frequency between two positions;
- in a second mode, oscillating the first deflector at a second frequency, the second frequency sufficiently high to limit the travel of the first deflector with respect to the two positions.
4 more elements
Dependencies are inferred from the claim text.