Motion Sensors - Optical

Part Number	Description / PDF	Quantity
LHI 968 Excelitas Technologies	PYRO DETECTOR DUAL INTRUSN ALRM	0
LHI 878/3902 Excelitas Technologies	SENSOR PYRO DETECTOR DUAL MOTION	8206
PYD 1098 Excelitas Technologies	SMART DIGIPYRO DUAL ELEMENT	36
PYD 1698 Excelitas Technologies	LOW POWER DIGIPYRO MOTION SENS	0
PYQ 1046 Excelitas Technologies	SMART DIGIPYRO QUAD PROGRAMMABLE	0
PYD 2792 Excelitas Technologies	MOTION SENSOR PIR LO PWR 6SMD	1555
PYD 1688 Excelitas Technologies	LOW POWER DIGIPYRO MOTION SENS	0
PYQ 1048 Excelitas Technologies	SMART DIGIPYRO QUAD ELEMENT	0
PYD 1096 Excelitas Technologies	SMART DIGIPYRO DUAL PROGRAMMABLE	297
PYD 1588 Excelitas Technologies	LOW POWER DIGIPYRO MOTION SENS	28108
PYD 1598 Excelitas Technologies	LOW POWER DIGIPYRO MOTION SENS	25735
PYQ 1548/7660 Excelitas Technologies	LOW POWER DIGIPYRO MOTION SENS	4593
PYD 1788 Excelitas Technologies	SMART DIGIPYRO DUAL MOTION	2348
PYQ 1548/7659 Excelitas Technologies	LOW POWER DIGIPYRO MOTION SENS	0
PYD1388 Excelitas Technologies	PYRO DETECTOR DUAL, MOTION SENS	869
LHI954 Excelitas Technologies	DUAL ELEMENT DETECT	0
PYD2592 Excelitas Technologies	SMD PYROELECTRIC DETECTOR (LOW P	495
PYQ1648-7052 Excelitas Technologies	DUAL ELEMENT DETECTOR	0
PYD 5790 Excelitas Technologies	SMD DIGIPYRO DUAL ELEMENT	0

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.