Support(Optical Sensor) | Seiko NPC Corporation

Application

Biological signal analysis by optical sensor

Amount of hemoglobin according to the heartbeat could be measured by using the nature that hemoglobin would selectively absorb green colored light.
Medical equipment to visualize the arteries and the veins and healthcare application.

Application example :
Image diagnostic equipment, Pulse oximeter, Thermometer(Contactless), Blood sugar meter etc.

chart — ※ Since hemoglobin will absorb green colored light,
so amount of light which enters to the sensor will be less when a lots of hemoglobin will exist.

Capture the image by linear image sensor

There will be the flexibility that scanning width of the image could be expanded by connecting multiple linear image sensors in parallel.
Application including image recognition function such as Business card scanner and Facsimile etc.

Spectrometer based on optical sensor

Spectrometer consists of linear image sensor, lens, mirror and grating etc.
Application including optical analysis or optical measurement functions.

Incident light will become parallel rays through correlation mirror.
This parallel rays will enter to the reflective type grating and will be spectrally dispersed by wavelengths.
Spectral light will be converged by focus mirror and will enter to the Linear image sensor.
According to the input light to the linear image sensor, specific output will be observed corresponding to the wavelength of the rays.

Spectrometer consists of linear image sensor, lens, mirror and grating etc.

Wavelength of light — Original light is dispersed by wavelength

Offer the Optical sensor solution

Seiko NPC has developed the CMOS optical sensor IC which consists of photo diode and amplifier circuit. We will be able to develop custom IC products based on above technologies and experiences.

We have the variety of optical sensor technology responding to various applications.

We also had variety of experiences to develop and to produce optical sensor products used for financial terminals and industrial equipment including image recognition technology.

Following are the available technologies and IPs,

・Analog output
・Digital output
・Analog serial output
・Parallel output
・A to D Converter
・Global shutter
・Saturation detection
・More function
・More performance
・Parallel operation of multiple ICs

Development Example

Spot Sensor：Specifications

ICs integrating photo diode and light detection circuit.

Stable output is possible within the operation temperature range with integrated dark current correlation circuit.

Parallel operation of multiple ICs is possible. It can be used as pseudo linear image sensor.

Application example :
Inspection equipment(Non destructive), Measurement equipment(Distance, Shape and Color etc), Medical equipment.

Example of Product

Operation temperature	-20℃～70℃	It may be possible to expand the temperature like -40℃ or 85℃.
Operation voltage	３～５.5V	Based on customer requests.
Power consumption	1.5ｍA
Output	Analog
REF voltage	0.1VDD
Dark output	REF reference
Random noise（σ）	1ｍVrms～7mVrms
Interface	4wire serial interface Gain settings Output control
Transimpedance ※	500kΩ～240MΩ （Controlled by 8bit）
Number of pixels	Single pixel	Multiple ISs are placed in parallel and used as linear image sensor.
Photo Diode size	1㎟	Size and shape can be customized.

Operation temperature

-20℃～70℃

It may be possible to expand the temperature like -40℃ or 85℃.

Operation voltage

３～５.5V

Based on customer requests.

Power consumption

1.5ｍA

Output

Analog

REF voltage

0.1VDD

Dark output

REF reference

Random noise（σ）

1ｍVrms～7mVrms

Interface

4wire serial interface
Gain settings
Output control

Transimpedance ※

500kΩ～240MΩ
（Controlled by 8bit）

Number of pixels

Single pixel

Multiple ISs are placed in parallel and used as linear image sensor.

Photo Diode size

1㎟

Size and shape can be customized.

※

Transimpedance：Equivalent resistance value in current voltage conversion circuit.

Linear Image Sensor：Specifications

High speed clock drive, High signal to noise ratio, High resolution analog signal output.

High speed 512 pixels of analog data transfer up to 13us.

Variety of applications such as Image data scan and distance measurement etc.

Application example :
Business card scanner, Facsimile, Copy machine, MFP, Financial terminal,
Barcode reader, Sorting machine, Displacement meter etc.

Example of Product

Operation temperature	-20℃～70℃	It may be possible to expand the temperature like -40℃ or 85℃.
Operation voltage	５V	It may be possible to expand the operation voltage like 3.3V
Power consumption	50ｍA	Based on customer requests.
Operation frequency	50MHz
Output	Analog
REF voltage	0.2VDD
Dark output	REF reference
Sensitivity	1V ※
Random noise（σ）	6ｍVrms
Line	76.9ｋ
Scanning width（ｍｍ）	6.3ｍｍ
Number of pixels	512 pixels
Photo Diode size	12.5um pitch	Other size like 12.5μm 、64μm 、127µm are available.

Operation temperature

-20℃～70℃

It may be possible to expand the temperature like -40℃ or 85℃.

Operation voltage

５V

It may be possible to expand the operation voltage like 3.3V

Power consumption

50ｍA

Based on customer requests.

Operation frequency

50MHz

Output

Analog

REF voltage

0.2VDD

Dark output

REF reference

Sensitivity

1V ※

Random noise（σ）

6ｍVrms

Line

76.9ｋ

Scanning width（ｍｍ）

6.3ｍｍ

Number of pixels

512 pixels

Photo Diode size

12.5um pitch

Other size like 12.5μm 、64μm 、127µm are available.

※

This is the example of specification with Photo Diode size（12.5um pitch, Height 1000um）
Condition of irradiation light（Wavelength:650nm, 19pW, Exposure time:1ms）

Characteristics・Product Shape

Optical Sensor：Example of characteristics

Light receiving sensitivity characteristic of photo diode：Example

Functions will be able to be customized based on requirement.(Possible to be optimized by cost and characteristic etc.)
Color filter function is available if necessary.