# US 5,710,425 A · Dual resolution scanner with light source and pivoting mirror in lid

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- Number: US 5,710,425 A
- Document ID: US5710425A
- Status: Granted
- Kind: A
- Application number: 08/551,220
- Filed: 1995-10-31
- Granted: 1998-01-20
- Earliest claimed: 1995-10-31
- Assignees: Hewlett-Packard Company
- Inventors: Charles H. McConica; Donald James Stavely; Daniel Maack Bloom
- Web page: https://patentgrep.com/patent/US5710425A

## CPC

- H04N 1/0408: {Different densities of dots per unit length}
- H04N 1/0402: {Scanning different formats; Scanning with different densities of dots per unit length, e.g. different numbers of dots per inch (dpi); Conversion of scanning standards (H04N1/00283 takes precedence; picture signal circuits for modification of image resolution H04N1/3935, H04N1/40068)}
- H04N 1/0423: {Switching between or selecting from a plurality of optical paths}
- H04N 1/0455: {using a single set of scanning elements, e.g. the whole of and a part of an array respectively for different formats}
- H04N 1/10: using flat picture-bearing surfaces {(H04N1/113, H04N1/195 take precedence)}
- H04N 1/193: using electrically scanned linear arrays {, e.g. linear CCD arrays}
- H04N 2201/0077: Types of the still picture apparatus
- H04N 2201/0406: Scanning slides
- H04N 2201/0418: capable of scanning transmissive and reflective originals at a single scanning station
- H04N: PICTORIAL COMMUNICATION, e.g. TELEVISION

## Abstract

An apparatus providing the capability to scan media at different resolutions is presented. The apparatus comprises an image area which is disposed between scanner lid and a scanner base, the lid is pivotally attached to the base to provide easy access to the image area. A light source resides within the scanner lid. Two separate light paths are provided, the first fight path is reflected off opaque targets, through the lid before entering the base and onto an array of photosensitive devices. The second light path is passed through transparent media, into the base and onto the array. First and second focusing lenses are provided, each for a light path. The focusing lenses provide two separate magnifications which yield two separate resolutions.

## Claims

### Claim 1

A document scanner comprising:
a scanner base;
a scanner lid attached to the scanner base;
an image area disposed between the scanner base and the scanner lid;
first and second light paths, the first light path reflects off the image area, the second light path passes through the image area;
a pivoting mirror located in the scanner lid, the pivoting mirror pivots between at least two positions, the second light path reflects off of the pivoting mirror through the image area;
first and second focusing lenses, the first focusing lens is located in the first light path, the second focusing lens is located in the second light path;
a photodetector array, the array residing within the scanner base, the array generates an electrical signal from the first and second light paths; and
a controller for controlling a light source, the controller residing within the scanner base and being electrically connected to the photodetector array and the light source, the light source generates the first and second light paths.

### Claim 2 (depends on 1)

The document scanner of claim 1, wherein the control means comprises:
a microcontroller electrically connected to a microprocessor;
a digital-to-analog converter connected to the microcontroller; and
a lamp driver, connected to the controller and the digital-to-analog converter, for providing a desired intensity to the fight source, the light source generating an actual intensity.

### Claim 3 (depends on 2)

The document scanner of claim 2, wherein the controller further comprises a comparator, connected to the digital-to-analog converter and the microcontroller, for comparing the desired fight intensity and the actual light intensity.

### Claim 4

A document scanner for scanning media at different resolutions, the scanner comprising:
a scanner base;
a scanner lid attached to the scanner base;
an image area disposed between the scanner base and the scanner lid;
a light source residing within the scanner lid;
a pivoting mirror located within the scanner lid, the pivoting mirror pivots between two positions, the fight source generating first and second light paths, the first fight path generated by reflecting off the image area, the second light path generated by reflecting off the pivoting mirror and through the image area; and
first and second focusing lenses located within the scanner base, the first focusing lens having a first magnification, the second focusing lens providing a second magnification, the first focusing lens located within the first light path, the second focusing lens located within the second light path.

### Claim 5 (depends on 4)

The document scanner of claim 4, further comprising a media-type selector for selecting a media type to be placed in the image area.

### Claim 6 (depends on 5)

The document scanner of claim 5, wherein the media-type selector can select between a print photograph, a 35 mm. slide and a 35 mm negative strip.

### Claim 7 (depends on 6)

The document scanner of claim 6, wherein the first light path illuminates the print photograph.

### Claim 8 (depends on 7)

The document scanner of claim 7, wherein the second light path illuminates the 35 mm slide and 35 mm negative strip.

### Claim 9 (depends on 8)

The document scanner of claim 8, further comprising an obstructor, the obstructor has first and second blocking panels, the second panel obstructs the second light path when media-type selector selects the print photograph, the first panel obstructs the first light path when the media-type selector selects either the 35 mm slide or the 35 mm negative strip.

### Claim 10

A scanner comprising:
a scanner base;
a scanner lid attached to the scanner base;
an image area disposed between the scanner base and the scanner lid;
a light source located within the scanner lid, the light generates first and second light paths, the first light path reflects off the image area, the second light path passes through the image area; and
a pivoting mirror located in the scanner lid, the pivoting mirror pivots between at least two positions, the second light path reflects off of the pivoting mirror through the image area.

### Claim 11 (depends on 10)

The scanner of claim 10 further comprising:
first and second focusing lenses, the first focusing lens is located in the first light path, the second focusing lens is located in the second light path;
a photodetector array, the array residing within the scanner base, the array generates an electrical signal from the first and second light paths; and
a controller for controlling the light source, the controller residing within the scanner base and being electrically connected to the photodetector array and the light source.