Motion Sensors - Optical

Part Number	Description / PDF	Quantity
USEQFSM122L100 KEMET	SENSOR MOTION PIR ANALOG DGTL	4
EKMB1293112 Panasonic	SENSOR MOTION PIR STD BLK LENS S	0
EKMC1609111 Panasonic	SENSOR PIR 170UA DIGITAL WHITE	39
EKMC4603112K Panasonic	SENSOR MOTION PIR LONG DIST BLK	1263
AMN43121 Panasonic	SENSOR MOTION SPOTDETECT DIG BLK	1154
EKMC7604113K Panasonic	SENSOR MOTION PIR WALL MNT	50
555-28027 Parallax, Inc.	SENSOR MOTION PASSIVE INFRARED	2236
USEQMSM1221600 KEMET	MODULE W/ 1.65MM FILTER APERTURE	9
EKMC4691111K Panasonic	SENSOR MOTION PIR SLIGHT MOTION	43
EKMB1308112K Panasonic	SENSOR PIR 6UA DIGITAL BLACK	0
EKMC4606113K Panasonic	SENSOR MOTION PIR LONG DIST PL W	172
USEQFCSA500100 KEMET	FLAME SENSOR, ANALOG TO-39, SING	19
USEQMSEA011680 KEMET	SENSOR PIR 1.65MM FILTER SMD	50
EKMC4609112K Panasonic	SENSOR PIR 170UA DIGITAL BLACK	0
EKMB1203112 Panasonic	SENSOR MOTION PIR 12M RANGE BLK	45
EKMC2601113K Panasonic	SENSOR MOTION PIR STD 170UA PL W	160
EKMB1300100K Panasonic	SENSOR PIR W/O LENS 6UA	2
AMN31112 Panasonic	SENSOR MOTION STD DETECT WHT LEN	0
EKMB4309112K Panasonic	SENSOR PIR 6UA DIGITAL BLACK	0
EKMB1301113K Panasonic	SENSOR PIR STD TYPE 6UA	763

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.