Structured Manufacturing Data (2026)

Position-Sensitive Detector

Based on aggregated insights from structured factory profiles within the CNFX directory, the standard Position-Sensitive Detector used in the Computer, Electronic and Optical Product Manufacturing sector typically supports operational capacities ranging from standard industrial configurations to heavy-duty production requirements.

Technical Definition & Core Assembly

A canonical Position-Sensitive Detector is characterized by the integration of Photodiode Array and Resistive Layer. In industrial production environments, manufacturers listed on CNFX commonly emphasize Silicon photodiode construction to support stable, high-cycle operation across diverse manufacturing scenarios.

An optoelectronic device that detects the position of a light spot on its active surface and outputs corresponding electrical signals.

Product Specifications

Technical details and manufacturing context for Position-Sensitive Detector

Definition
A critical component within Laser Alignment Modules that precisely measures the displacement or position of a laser beam by converting the position of incident light into electrical signals, enabling real-time monitoring and adjustment of alignment in industrial systems.
Working Principle
Utilizes a photodiode array or continuous resistive layer to detect the centroid position of incident light. When a laser beam strikes the active area, photocurrents are generated at different positions. The ratio of these currents determines the exact beam position, which is then converted to voltage or digital signals for position measurement.
Common Materials
Silicon photodiode, Resistive layer, Protective window
Technical Parameters
  • Active area dimensions (e.g., 10×10 mm) (mm) Customizable
Components / BOM
  • Photodiode Array
    Converts incident light into electrical current at specific positions
    Material: Silicon
  • Resistive Layer Part
    Distributes photocurrent to determine centroid position of light spot
    Material: Doped semiconductor
  • Output Electrodes Part
    Collects position-dependent currents for signal processing
    Material: Metal (typically aluminum or gold)
  • Protective Window Part
    Shields sensitive components from environmental contaminants
    Material: Optical glass or quartz

Industry Taxonomies & Aliases

Commonly used trade names and technical identifiers for Position-Sensitive Detector.

Applied To / Applications

This component is essential for the following industrial systems and equipment:

Industrial Ecosystem & Supply Chain Structure

Complementary Systems
Downstream Applications
Specialized Tooling

Application Fit & Sizing Matrix

Operational Limits
pressure: Atmospheric (non-pressurized)
other spec: Wavelength range: 400-1100 nm, Active area: 1-100 mm² typical
temperature: -40°C to +85°C
Media Compatibility
✓ Clean air environments ✓ Optical bench setups ✓ Vacuum chambers
Unsuitable: High particulate/dust environments
Sizing Data Required
  • Active area dimensions required
  • Spatial resolution needed
  • Light spot intensity range

Reliability & Engineering Risk Analysis

Failure Mode & Root Cause
Optical surface contamination
Cause: Accumulation of dust, oil, or debris on the detector's sensing surface, often due to inadequate sealing or environmental exposure, leading to signal degradation or complete failure.
Electronic drift or instability
Cause: Thermal stress, aging of components (e.g., photodiodes, amplifiers), or power supply fluctuations, resulting in inaccurate position readings or loss of calibration.
Maintenance Indicators
  • Inconsistent or erratic position readings during operation, indicating potential signal interference or component failure.
  • Visible contamination, discoloration, or physical damage on the detector's optical window or housing, suggesting environmental ingress or impact.
Engineering Tips
  • Implement regular cleaning protocols using approved, non-abrasive methods and ensure proper environmental sealing to prevent contamination and moisture ingress.
  • Maintain stable operating conditions, including controlled temperature and clean power supply, and perform periodic calibration checks to detect and correct drift early.

Compliance & Manufacturing Standards

Reference Standards
ISO 9001:2015 (Quality Management Systems) IEC 61010-1:2010 (Safety Requirements for Electrical Equipment) CE Marking (EU Conformity for Electrical Equipment)
Manufacturing Precision
  • Positional Accuracy: +/-0.001mm
  • Linearity Error: <0.1% of full scale
Quality Inspection
  • Optical Calibration Test (using laser interferometer)
  • Environmental Stress Screening (temperature, humidity, vibration)

Factories Producing Position-Sensitive Detector

Manufacturer profiles with relevant production capability in China

Manufacturer listings support early research and capability understanding. They are not certification, ranking, or transaction guarantees.

Technical documentation
4/5
Manufacturing capability
4/5
Inspection readiness
5/5
Supplier transparency
3/5

These scores are example evaluation dimensions, not real customer ratings, country-specific buyer feedback, or live inquiry activity.

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Frequently Asked Questions

What is the working principle of a position-sensitive detector?

A position-sensitive detector works by using a silicon photodiode with a resistive layer. When a light spot hits the active surface, it generates photocurrents that flow through the resistive layer to output electrodes. The position is determined by comparing the current ratios from different electrodes.

What are the main applications of position-sensitive detectors in electronics manufacturing?

Position-sensitive detectors are used in optical alignment systems, laser beam positioning, displacement measurement, vibration analysis, and automated optical inspection equipment in electronics and optical product manufacturing.

How does the protective window affect detector performance?

The protective window shields the photodiode array from environmental contaminants while maintaining optical clarity. It's designed to minimize light scattering and reflection to ensure accurate position detection without compromising sensitivity or response time.

Can I contact factories directly on CNFX?

CNFX is an open directory, not a transaction platform. Each factory profile provides direct contact information and production details to help you initiate direct inquiries with Chinese suppliers.

Data Basis

CNFX manufacturer profiles, technical classification, publicly available product information, and ongoing plausibility checks.

Preliminary Technical Classification
This page supports structured research, RFQ preparation, and supplier evaluation. It does not replace buyer-led supplier qualification, standards review, or technical approval.

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