Spatial light modulator scanning system

• US 5,563,398 A
• Filed: 10/31/1991
• Issued: 10/08/1996
• Est. Priority Date: 10/31/1991
• Status: Expired due to Term

• Current Assignee: Texas Instruments, Inc.
• Original Assignee: Texas Instruments, Inc.
• Inventors: Sampsell, Jeffrey B.
• Primary Examiner(s): Nelms, David C.
• Assistant Examiner(s): PHAN, TRONG Q
• Application Number:
  US07/786,162
• Time in Patent Office: 1,804 Days
• Field of Search: 359/291, 359/294
• US Class Current: 235/454
• CPC Class Codes: G02B 26/10 Scanning systems
• CPC Class Codes: G06K 7/10594 Beam path
• CPC Class Codes: G06K 7/10702 Particularities of propagating elements, e.g. lenses, mirrors G06K7/10831 takes precedence

Abstract

A system for scanning objects is disclosed. The system consists of a light source, a spatial light modulator, and appropriate optics for directing the light from the source to the spatial light modulator and to the object to be scanned. Individual elements upon the modulator are activated to reflect those pixels'"'"' width of the light to the object. A detector is mounted such as to receive reflections from the object to be processed. The system can be hand-held, mounted into a counter, or used in other applications such as edge detector scanners.

Claims

1. A scanning system comprising:

a. a light source;

b. a spatial light modulator for directing light from said source to an object;

c. a detector for receiving reflections of said light from said object, and converting said reflections into data for use in a processor; and

d. optics for directing light from said source to said spatial light modulator and from said spatial light modulator to said object.

2. The system as claimed in claim 1 wherein said scanning system is hand-held.

3. The system as claimed in claim 1 wherein said scanning system scans from below said object.

4. The system as claimed in claim 1 wherein said spatial light modulator is a deformable mirror device.

5. A method for scanning an object comprising:

a. providing illumination from a light source;

b. passing said illumination to a spatial light modulator;

c. deflecting at least one element upon said spatial light modulator to reflect part of said illumination to an object;

d. impinging said illumination upon said object;

e. detecting reflections of said illumination from said object; and

f. converting said detected reflections into data for use in a processor.