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The future of medical technology: optical sensors

Update: 2019-10-17 16:27 Source: LUFTMY Reading: ↻ News

What is an optical sensor?

Optical sensors are devices used to safely measure biological, chemical and physiological parameters of the human body.These sensors provide quantitative, qualitative and reliable results. They are life-saving devices that can simply capture and process physiological information.Biomedical sensors are favored because of their small size, intelligence, reliability, strong selectivity, high sensitivity, good biocompatibility, high speed, easy to mass production and remote control.They have the unique ability to select a parameter without interfering with other parameters.Types of biomedical sensors include direct/indirect, contact/remote, invasive/non-invasive, real-time/static and sensory/driven.Each biomedical sensor consists of a sensing element and a physical sensor that converts measurements into an output signal.

Application of optical sensors

Optical sensors are used in health monitors, brain function monitors and wearable devices.A glucometer is an embedded optical sensor that measures blood sugar levels using a camera-like device.The widely acclaimed device can measure blood sugar levels without the need for a tingling finger.

Optical Sensors in Symmetry’s Line Up

Silicon lab's Si1120 is a highly sensitive active infrared proximity and ambient light sensor integrated circuit that achieves innovative non-contact human-computer interface applications with ultra-low power consumption.The device consists of an infrared LED driver, an infrared photodiode, an ambient light sensor, and control logic encapsulated in a 3mm x 3mm clear DFN.The high sensitivity of infrared near range measurements provides customers with an opportunity to achieve proximity and ambient light sensors with very low power levels.


Pulse width modulation output

Ambient light sensor

Seven precision optical measurement modes

3 proximity ranges

3 DC ambient light sensing ranges

1 calibration mode

The low noise environment cancellation circuit allows the highest sensitivity with 8-12 bit resolution

Working under direct sunlight (100 Klux)

Minimum reflex sensitivity < 1 W /cm2

No shielding package, strong anti - electromagnetic interference

Power supply: 2.2 to 3.7 V

Operating temperature range -40 to +85 c

Typical 10 microamperes current consumption

Programmable 400/50 ma LED constant current driver output

Allows independent LED power voltage3 proximity ranges1 calibration mode


These low-cost, high-precision optical displacement sensors are designed to detect the displacement of an object. Original optical design technology and circuit, mechanical technology, to provide high precision, large range.


High accuracy => measurement accuracy +/ -0.1

Long-term = > detection range :1000 m

Compact size => 20x20x10mm

LD09 laser PM2.5 dust sensor
LD09 laser PM2.5 dust sensor

Guangzhou LUFTMY LD09 laser PM2.5 sensor adopts Mie spherical particle scattering principle.That is, the laser sensor USES the laser to illuminate the suspended particles in the air to generate light scattering. The photodetector collects the scattered light intensity within a certain Angle range, converts the obtained scattered light intensity into a voltage linearly, and then sends it into the da0ta processing system.The data processing system processed the data according to the program prepared in advance and Mie scattering theory, and obtained the equivalent particle size of the particles and the number of particles with different particle sizes in the unit volume.The sensor is suitable for detector, wearables, air purifier, fresh air system, etc.

Online application

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