Editorial Technical Reference

Interferometric Measurement Head

This page explains how Interferometric Measurement Head is classified within Computer, Electronic and Optical Product Manufacturing. Technical values and manufacturer relationships are research references; confirm the current specification and supplier evidence for each order.

Technical Definition & Core Assembly

A precision optical component that uses interferometry to measure lens centering and alignment in optical manufacturing systems.

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Product Specifications

Technical details and manufacturing context for Interferometric Measurement Head

Definition
The interferometric measurement head is a critical component of the Precision Optical Lens Centering Machine, responsible for non-contact measurement of lens centering errors, surface tilt, and optical axis alignment through laser interferometry principles. It provides micron-level accuracy for quality control in optical lens production. The head operates by splitting a coherent laser beam into reference and measurement paths; the measurement beam reflects off the lens surface and recombines with the reference beam, creating interference patterns that are analyzed to determine precise displacement, tilt, and centering parameters. This component is designed for integration into automated optical manufacturing systems, offering a measurement range of 0–10 mm for centering error, a resolution of 0.1 µm, and an overall accuracy of ±0.5 µm. Repeatability is ±0.2 µm, and the working distance ranges from 20 to 50 mm. The head uses a He-Ne laser with a wavelength of 632.8 nm and provides digital data output via USB 2.0. It requires a 24 V DC ±10% power supply and operates within a temperature range of 15–35 °C for specified accuracy, with storage from -10 to 50 °C and relative humidity of 20–80% non-condensing. The housing is rated IP54 per IEC 60529 for dust and splash protection. The head weighs 1.5 kg and is constructed from optical glass, stainless steel, and aluminum alloy. This directory entry provides reference specifications; actual values and standards must be verified with the legal manufacturer or supplier for the specific model and application.
Working Principle
The interferometric measurement head uses laser interferometry to measure lens centering and alignment. A coherent light beam from a He-Ne laser is split into a reference beam and a measurement beam. The measurement beam reflects off the lens surface under test and recombines with the reference beam. The resulting interference pattern is captured and analyzed to determine precise displacement, tilt, and centering parameters. This non-contact method provides micron-level accuracy without touching the lens surface.
Common Materials
Optical glass, Stainless steel, Aluminum alloy
Technical Parameters
ParameterTypical rangeNotes & selection driver
Measurement Range0–10 mmRange for centering error measurement
Resolution0.1 µmMinimum detectable displacement
Accuracy±0.5 µmOverall measurement uncertainty
Repeatability±0.2 µmStandard deviation of repeated measurements
Working Distance20–50 mmDistance from head to test surface
Laser Wavelength632.8 nmHe-Ne laser
Output InterfaceUSB 2.0Digital data output
Power Supply24 ±10% V DCExternal power adapter
Operating Temperature15–35 °CFor specified accuracy
Storage Temperature-10–50 °CNon-condensing
Relative Humidity20–80 %Non-condensing
Ingress ProtectionIP54Dust and splash proofIEC 60529
Weight1.5 kgHead only

Ranges are indicative industry figures for RFQ preparation, not a supplier commitment. Confirm every value and standard with the legal manufacturer before ordering.

Components / BOM
  • Laser Source
    Generates coherent light beam for interferometry
    Material: Semiconductor laser diode
  • Beam Splitter
    Divides laser beam into reference and measurement paths
    Material: Optical glass with dielectric coating
  • Reference Mirror Part
    Provides stable reference path for interferometric comparison
    Material: Fused silica with high-reflectivity coating
  • Detector Array
    Captures interference patterns for analysis
    Material: CCD/CMOS sensor

Industrial Ecosystem & Supply Chain Structure

Complementary Systems
Downstream Applications
Specialized Tooling

Application Fit & Sizing Matrix

Operational Limits
pressure: Atmospheric pressure only (non-pressurized environment)
other spec: Vibration tolerance: <0.5g RMS, Humidity: 30-70% non-condensing, Cleanroom class: ISO 5 or better recommended
temperature: 15°C to 30°C (operating), 10°C to 40°C (storage)
Media Compatibility
✓ Optical glass lenses ✓ Precision polymer optics ✓ Crystalline materials (e.g., silicon, germanium)
Unsuitable: Abrasive slurry environments or high particulate contamination
Sizing Data Required
  • Lens diameter range (mm)
  • Required measurement accuracy (microns)
  • Integration interface requirements (e.g., mounting, data output format)

Reliability & Engineering Risk Analysis

Failure Mode & Root Cause
Optical Component Contamination
Cause: Accumulation of dust, oil mist, or particulate matter on lenses or mirrors, degrading measurement accuracy due to light scattering or absorption.
Laser Diode Degradation
Cause: Thermal stress from prolonged operation or inadequate cooling, leading to wavelength drift, reduced output power, or complete failure.
Maintenance Indicators
  • Inconsistent or fluctuating measurement readings despite stable environmental conditions
  • Unusual audible hum or high-pitched noise from the cooling fan or internal components
Engineering Tips
  • Implement a regular cleaning schedule using approved optical-grade solvents and lint-free wipes in a controlled, clean environment to prevent contamination buildup.
  • Ensure proper thermal management by maintaining ambient temperature within specified limits and verifying cooling system functionality during preventive maintenance checks.

Indicative industry ranges for design and RFQ preparation. Confirm the exact figures and applicable standard with the manufacturer before specifying.

Compliance & Manufacturing Standards

Applicable Standards
ISO 14978:2018 (Geometrical product specifications - General concepts and requirements for GPS measuring equipment) ANSI/ASME B89.1.12 (Methods for Performance Evaluation of Coordinate Measuring Machines) DIN EN ISO 10360-2 (Geometrical product specifications - Acceptance and reverification tests for coordinate measuring machines)

Quoted from the published standard.

Manufacturing Precision
  • Flatness of reference surface: ≤0.1 μm over 100 mm
  • Repeatability of displacement measurement: ±0.01 μm
Quality Inspection
  • Laser interferometer calibration verification against NIST-traceable standards
  • Environmental stability testing (temperature, vibration, humidity)

Manufacturers of Interferometric Measurement Head

Manufacturer profiles associated with Interferometric Measurement Head.

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Frequently Asked Questions

What is the measurement range of the interferometric measurement head?

The measurement range for centering error is 0–10 mm, as listed in the directory. This is a reference range; the actual range for a specific model should be confirmed with the manufacturer.

What is the resolution and accuracy of the head?

The resolution is 0.1 µm, and the overall accuracy is ±0.5 µm. These values are reference specifications and must be verified for the specific model and application.

What are the environmental operating conditions?

For specified accuracy, the operating temperature is 15–35 °C. Storage temperature is -10 to 50 °C, and relative humidity is 20–80% non-condensing. The head is rated IP54 per IEC 60529.

How is the head connected to a system?

The head provides digital data output via USB 2.0 and requires a 24 V DC ±10% power supply. These interfaces are reference specifications; confirm compatibility with the manufacturer.

Data Basis

Editorial classification, named public sources where available, and source-reviewed manufacturer records.

Preliminary Technical Classification
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