Motion Sensors - Optical

Part Number	Description / PDF	Quantity
USEQFSM1448100 KEMET	SENSOR MOTION PIR ANALOG DGTL	5
USEQMSM1220900 KEMET	MODULE W/ 0.90MM FILTER APERTURE	8
USEQMSEA220980 KEMET	SENSOR PIR 1.65MM FILTER SMD	49
USEQMSEA221680 KEMET	SENSOR W/ 1.65MM FILTER APERTURE	49
USEQFSEA22L180 KEMET	SENSOR PIR FLAME DIGITAL SMD	0
SS-430 KEMET	PYRO SENSOR MODULE 60DEG 2M DIST	37
USEQFCSA455100 KEMET	FLAME SENSOR, ANALOG TO-39, SING	50
USEQMSM1011600 KEMET	MODULE W/ 1.65MM FILTER APERTURE	9
USEQFCSA435100 KEMET	FLAME SENSOR, ANALOG TO-39, SING	17
SS-430L-N KEMET	PYRO SENSOR MODULE 37DEG(H) 28DE	130
PL-N823-01 KEMET	PYROELECTRIC SENSORS	1702
USEQFSM1464100 KEMET	SENSOR MOTION PIR ANALOG DGTL	3
USEQFCSA448100 KEMET	SENSOR PIR ANALOG T039 METAL CAN	10
USEQFSM150L100 KEMET	SENSOR MOTION PIR ANALOG DGTL	5
USEQFSEA464180 KEMET	SENSOR PIR FLAME DIGITAL SMD	22
USEQFSM122L100 KEMET	SENSOR MOTION PIR ANALOG DGTL	4
USEQMSM1221600 KEMET	MODULE W/ 1.65MM FILTER APERTURE	9
USEQFCSA500100 KEMET	FLAME SENSOR, ANALOG TO-39, SING	19
USEQMSEA011680 KEMET	SENSOR PIR 1.65MM FILTER SMD	50
SS-430L-BK KEMET	PYRO SENSOR MODULE 37DEG(H) 28DE	56

Motion Sensors - Optical

1. Overview

Optical motion sensors detect movement through changes in light patterns, utilizing principles of optics and photonics. These sensors convert mechanical motion into electronic signals by measuring variations in light intensity, wavelength, or time-of-flight. Their importance spans across consumer electronics, industrial automation, healthcare, and automotive sectors, enabling contactless detection with high precision and reliability.

2. Main Types and Functional Classification

Type	Functional Characteristics	Application Examples
Photoelectric Sensors	Use light beams and receivers to detect object presence/absence	Assembly line automation, security systems
Laser Doppler Velocimeters (LDV)	Measure velocity using Doppler frequency shifts	Fluid dynamics research, precision machining
CMOS Image Sensors	Capture 2D/3D motion data through pixel arrays	Smartphone cameras, AR/VR headsets
Optical Encoders	Convert mechanical motion to digital signals via coded disks	Robotics, CNC machines
Fiber Optic Sensors	Use light propagation changes in optical fibers	Aerospace structural monitoring, seismic detection

3. Structure and Components

Typical optical motion sensors consist of:

Light Source: LEDs, lasers, or VCSELs emitting specific wavelengths (650-950nm range)
Optical Elements: Lenses, diffraction gratings, or fiber guides for beam shaping
Detector Array: PIN photodiodes, avalanche photodiodes, or CMOS image sensors
Signal Processor: ASICs for time-of-flight calculations or pattern recognition
Interface Circuitry: Analog-to-digital converters and communication protocols (I2C, SPI)

4. Key Technical Specifications

Parameter	Description	Importance
Resolution	Minimum detectable displacement ( m to nm range)	Determines measurement precision
Response Time	Signal processing speed ( s to ms)	Critical for real-time applications
Wavelength Range	Operational spectrum (visible: 400-700nm, IR: 700-1600nm)	Affects material interaction and accuracy
Signal-to-Noise Ratio	Measurement stability (50-120dB typical)	Impacts reliability in dynamic environments
Field of View	Detection angle range (15 -180 )	Defines spatial coverage area

5. Application Fields

Major industries include:

Consumer Electronics: Smartphone gesture control, gaming consoles
Industrial Automation: Robotic arm positioning, conveyor belt monitoring
Healthcare: Motion analysis systems, prosthetic limb control
Automotive: ADAS collision avoidance, driver monitoring systems
Scientific Research: Particle tracking, vibration analysis

Typical devices: Optical mice use 2D CMOS sensors (20-50 ips tracking speed), LiDAR systems employ 905nm pulsed lasers for 3D mapping.

6. Leading Manufacturers and Products

Manufacturer	Product Series	Key Specifications
TI (Texas Instruments)	OPT3101	16-bit depth sensing, 100ksps sampling rate
STMicroelectronics	VL53L5CX	Multi-zone LiDAR, 60 FoV, 10m range
Keyence	LKG5000 Series	0.01 m resolution, 50kHz sampling
Omron	B5W-LB Series	Infrared proximity detection, 10ms response
ams AG	TMF8801	940nm proximity sensor, 5% distance accuracy

7. Selection Guidelines

Key considerations:

Detection Range vs. Resolution Trade-off
Environmental factors (ambient light, temperature)
Power consumption requirements (especially for IoT devices)
Optical crosstalk prevention in multi-sensor systems
Mounting constraints (through-hole vs. surface-mount packages)

For outdoor applications, select sensors with IR filtering and temperature compensation. In medical devices, prioritize biocompatible packaging and EMI resistance.

8. Industry Trends

Emerging developments include:

Miniaturization through MEMS integration (sub-1mm sensors)
AI-enhanced motion prediction algorithms
Multi-spectral sensing combining visible/NIR/SWIR ranges
Wireless sensor networks with embedded edge computing
Quantum dot-based single-photon avalanche diodes (SPADs)

Market growth driven by AR/VR demand (CAGR 18.7% 2023-2030) and industrial IoT adoption.