Patent · US Active

Optically based planar scanner

US8354640B2 · kind B2 · utility

88Cited by

0References

35Claims

0Family size

Assignee

Identix Incorporated · US

Inventors

John David Hamre · Plymouth, US
Daniel Frederick Maase · Plymouth, US

Key dates

Filing date	Sep 9, 2010
Grant date	Jan 15, 2013
Priority date	—
Expiry date	Jul 20, 2031

Classification

Technology area (CPC G)Physics
CPC primaryG02F2203/62
WIPO fieldOptics
WIPO sectorInstruments

Abstract

Apparatus and methods for providing an optically based planar scanner for generating an image are provided. In one embodiment, the apparatus includes a switchable Bragg grating. An area of the switchable Bragg grating is configured to be activated to direct light to a platen. The platen is configured to reflect the light to a waveguide or to refract the light. The light reflected to the waveguide is guided to a light detector. By activating a number of the areas of the switchable Bragg grating and measuring the intensity of the light with a light detector, an image of an object contacting the platen may be formed.

Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.