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Optical Systems

Ultra-compact-scanning-system-for-a-wide-range-of-speeds-angles-and-field-depth

Method for determining rheumatoid factors and agents for carrying out the method

The invention claimed is: 1. A process for preparing a diagnostic reagent for Rheumatoid Factor ...

Reverse light blocking hologram for a center high mounted stoplight

OF THE DISCLOSURE In the following detailed description and in the several figures of the drawing, ...

Production of holograms

We claim: 1. A method of preparing a hologram which is of the silver halide in gelatin binder type ...

Silver halide photographic material

OF THE INVENTION In the present invention, elution of an antifoggant from a silver halide emulsion ...

Methods and apparatus for making holograms

OF PREFERRED EXEMPLARY EMBODIMENTS In the context of the present invention, a volumetric data set ...

Wide image scanner

Accordingly, it is an object of the present invention to provide a wide image scanner which can ...

Holographic optical element for optical disk pickup head

OF THE PREFERRED EMBODIMENTS FIG. 1 illustrates a pickup head 20, showing selected components by ...

Scanning of images

It is therefore an object of the present invention to be able to scan all records simultaneously to ...

Fax machine with retractable drawer

The invention may comprise a modular fax machine having a document feeder and a control panel ...

Transmissive holographic optical element on aberrating substrate

What is claimed is: 1. A method for using a transmissive holographic optical element comprising the ...

Ultra compact scanning system for a wide range of speeds, angles and field depth

Details

Inventors: Plesko, George A.;
Assignee: Geo Labs, Inc. (Media, PA)
Primary Examiner: Phan; James
Assistant Examiner:
Attorney, Agent or Firm: Reed, Smith, Shaw & McClay

A non-contact light beam scan system small enough to fit into a hand holdable wand, pen or calculator size terminal incorporates a novel scan element which can scan at rates of ten to hundreds of scans per second in one or two dimensions. The device is immune to low frequency vibrations and can scan large angles of 60 degrees or more. Automatic trigger circuitry enables it to be used equally well in hand held or fixed mount applications. The depth of operating range is extended with a novel focal system which is integrated with the light source. The entire scanning system for generating a beam, focusing the beam electronically, scanning the beam, collecting light from a target and converting it into electrical signals, and automatically generating a trigger signal can work with industry standard low or high speed bar code decoders.

DETAILED DESCRIPTION It is an object of the present invention to provide an extremely compact non-contact scanning system with high immunity to external vibration, suitable for incorporation into wand or pen size information readout devices as well as pocket calculator size terminals having a keyboard and display which can operate at low scan rates on the order of 40 scans per second.
It is another object of the present invention to provide a scan component for scanning a beam below a resonant frequency at a more constant speed than typical resonant scanners have over a range of scan speeds and scan angles.
It is yet another object of the present invention to provide a miniature scan device which will start quickly and stabilize to a specific scan angle with low settling time.
It is still another object of the present invention to provide a self adjusting focus means with the light source and the scan component to form an integrated modular scan system.
It is yet another object of the present invention to provide a miniature scan system which can be adapted for use in a non-contact pen or wand shaped bar code scanner which is compatible with decode equipment operating in the low speed range on the order of 40 scans per second although it may scan significantly faster than 40 scans per second.
It is a further object of the present invention to provide low power, low voltage drive circuitry for the scan system of the present invention which is adapted for portable battery operated equipment.
Still another object of the present invention is to provide visual positioning and range aids to a user.
Yet another object of the invention is to provide a scan system with automatic triggering, particularly which is equally suited for fixed mount or hand held use.
It is yet another object of the present invention to provide a compact scan system which can provide two dimensional scan patterns such as omnidirectional and raster patterns.
These and other objects of the invention will become apparent as the various preferred embodiments are described below

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