Multi-position trigger for control over aiming and symbol reading in a portable laser diode scanning head
First Claim
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1. An arrangement in a light-scanning system for reading indicia having parts of different light reflectivity, comprising:
- (a) a housing having an exit port;
(b) light source means in the housing for generating a light beam;
(c) actuatable control means in the housing for directing the light beam through the exit port to illuminate a first zone on the indicia in a first operational state, and for directing the same light beam to illuminate a second zone on the indicia in a second operational state; and
(d) actuator means for manually actuating the control means between said states, including a multi-position trigger manually displaceable from an off position to a first position corresponding to the first operational state, and being further manually displaceable from the first position to a second position corresponding to the second operational state.
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Abstract
A multi-position trigger switch on-board hand-held laser scanning heads controls aiming and reading of a symbol in separate operational states, all without using discrete aiming light subsystems. A head is aimable at the symbol during a first operational state wherein a static or dynamic aiming is illuminated on the symbol. During a second operational state, a dynamic reading zone extends across the symbol to read the same. The same laser beam is employed to illuminate both zones.
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Citations
17 Claims
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1. An arrangement in a light-scanning system for reading indicia having parts of different light reflectivity, comprising:
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(a) a housing having an exit port; (b) light source means in the housing for generating a light beam; (c) actuatable control means in the housing for directing the light beam through the exit port to illuminate a first zone on the indicia in a first operational state, and for directing the same light beam to illuminate a second zone on the indicia in a second operational state; and (d) actuator means for manually actuating the control means between said states, including a multi-position trigger manually displaceable from an off position to a first position corresponding to the first operational state, and being further manually displaceable from the first position to a second position corresponding to the second operational state. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 11)
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12. A system for reading bar code symbols or the like, comprising;
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scanning means for generating a laser beam directed toward a symbol to be read; control means including a multi-position trigger operatively connected to the scanning means and manually displaceable from an off position to a first selectable position for producing a first beam pattern that enables a user to manually aim and direct the beam to the symbol at a location desired by the user and being further manually displaceable from the first position to a second selectable position for producing a second beam pattern that entirely sweeps the symbol to be read; and detection means for receiving reflected light from the symbol to produce electrical signals corresponding to data represented by the symbol. - View Dependent Claims (13, 14)
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15. A method of reading bar code symbols or the like, comprising the steps of:
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directing a laser beam toward a symbol to be read; manually displacing a multi-position trigger from an off state to a first operational state in which a first beam pattern with said laser beam is produced to enable a user to manually aim and direct the beam to the symbol at a location desired by the user; manually displacing the trigger from the first operational state to a second operational state in which a second beam pattern that entirely sweeps the symbol is produced; and receiving reflected light from the symbol to produce electrical signals corresponding to data represented by the symbol. - View Dependent Claims (16, 17)
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Specification