# US 8,464,952 B2 · Optical reader having improved back-illuminated image sensor

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- Number: US 8,464,952 B2
- Document ID: US8464952B2
- Status: Granted
- Kind: B2
- Application number: 12/621,088
- Filed: 2009-11-18
- Published: 2011-05-19
- Granted: 2013-06-18
- Earliest claimed: 2009-11-18
- Assignees: Hand Held Products, Inc.
- Applicants: Alexey Chernyakov; Daniel Van Volkinburg; Brian Jovanovski
- Inventors: Alexey Chernyakov; Daniel Van Volkinburg; Brian Jovanovski
- Web page: https://patentgrep.com/patent/US8464952B2

## CPC

- G06K 7/10732: {Light sources}
- G06K 7/10564: {Light sources}
- G06K 7/10831: {Arrangement of optical elements, e.g. lenses, mirrors, prisms (optical elements per se G02B)}
- G06K: GRAPHICAL DATA READING (image or video recognition or understanding G06V); PRESENTATION OF DATA; RECORD CARRIERS; HANDLING RECORD CARRIERS

## Abstract

An optical reading device for collecting and processing symbology data comprising: a back-illuminated image sensor for converting light reflected from an information bearing indicia (IBI) into output signals representative thereof; receive optics for directing light from the target to the back-illuminated image sensor; a processor for decoding the output signals; an illumination source for generating illumination light illuminating the target and illumination optics for directing the illumination light onto the target and a housing encompassing the back-illuminated image sensor, receive optics and illumination source adapted for hand held operation.

## Claims

### Claim 1

An optical reading device for collecting and processing symbology data comprising:
a back-illuminated image sensor for converting light reflected from an information bearing indicia (IBI) into output signals representative thereof;
receive optics for directing light from a target to the back-illuminated image sensor; a processor for decoding the output signals;
an illumination source for generating illumination light illuminating the target and illumination optics for directing the illumination light onto the target;
a housing encompassing the back-illuminated image sensor, receive optics and illumination source adapted for hand held operation
wherein an incident light beam is irradiated to a back face of a chip opposite to another face or surface of the chip on which electrodes are disposed and the back-illuminated image sensor comprises a light converting portion for each pixel on the back face side of the chip, and is provided with portions for processing signal charges.

### Claim 2 (depends on 1)

An optical reading device in accordance with claim 1, wherein the back-illuminated image sensor is at least one of the following: color; monochrome; monocolor; 2D; CCD; CMOS; NMOS; PMOS; CID and CMD.

### Claim 3 (depends on 1)

An optical reading device in accordance with claim 1, wherein a focal point of the receive optics is at infinity.

### Claim 4 (depends on 1)

An optical reading device in accordance with claim 1, wherein the IBI is a printed or displayed symbology.

### Claim 5 (depends on 1)

An optical reading device in accordance with claim 1, wherein the back-illuminated image sensor is operated in the at least one of the following modes:
rolling shutter; global shutter and full frame operating mode.

### Claim 6 (depends on 1)

An optical reading device in accordance with claim 1, further comprising an aiming generator light source for creating an aiming light pattern on the IBI.

### Claim 7 (depends on 1)

An optical reading device in accordance with claim 1, wherein the back-illuminated image sensor has a first circuit layer or tier of a silicon or compound semiconductor device and a second and subsequent tiers having silicon-on-insulator (SOI) based electronics, wherein the back-illuminated image sensor is adapted to be operated with light directly incident on a photo detector without obscuration from pixel circuitry, and wherein a lens is adapted to be associated with each light converting portion to facilitate light being directed appropriately through the light converting portion.

### Claim 8 (depends on 1)

An optical reading device in accordance with claim 1, wherein the back-illuminated image sensor comprises a single-wafer-based fabricated in silicon-on-insulator wafers by locating photosensitive elements in a handle wafer.