Professional and high-precision optical inspection equipment is the core guarantee for verifying the quality and performance of optical lenses, covering the testing of optical parameters, surface quality, dimensional accuracy, and environmental reliability. The key equipment and their application scenarios are as follows:

1. Optical Performance Testing Equipment

• Laser Interferometer: A core device for testing the form accuracy of optical surfaces (especially aspherical and freeform surfaces). It uses laser interference principles to measure surface deviation (peak-to-valley PV value, root-mean-square RMS value), ensuring compliance with ISO 10110 requirements. Suitable for high-precision lenses such as HUD combiners, AR/VR lenses, and camera aspherical lenses, with measurement accuracy up to nanometer level.
• Optical Profilometer: Used to test surface roughness (Ra, Rq) and micro-topography of optical lenses. It can accurately detect micro-defects such as scratches and digs on the lens surface, matching the surface quality requirements specified in ISO 10110-3. Common types include white light interferometric profilers and stylus profilers, with Ra measurement range up to 0.001 μm.
• Transmittance/Haze Tester: Measures the light transmittance (total transmittance, parallel transmittance) and haze of optical lenses. Critical for lenses requiring high light transmission, such as automotive headlight lenses, HUD combiners, and medical endoscope lenses. It ensures transmittance ≥ 90% (or higher) for most optical lenses and haze ≤ 1% to avoid affecting light propagation quality.
• Birefringence Meter/Polarimeter: Tests stress birefringence in optical lenses, which is essential for lenses used in polarizing systems or high-precision imaging (e.g., COP HUD combiners, medical diagnostic lenses). It complies with ISO 10110-7 requirements, measuring the birefringence value (nm/cm) to avoid light distortion caused by residual stress.
• Spectrophotometer: Analyzes the spectral characteristics of optical lenses, including spectral transmittance, reflectance, and color temperature. Suitable for testing coated lenses (e.g., AR anti-reflective coating, UV-resistant coating) to verify coating performance (e.g., AR coating reflectance < 1%) and color consistency of automotive lighting lenses.

2. Dimensional Accuracy Testing Equipment

• Coordinate Measuring Machine (CMM): Tests the geometric dimensions and tolerances of optical lenses, such as diameter, center thickness, edge thickness, parallelism, and perpendicularity. It adopts high-precision probes (contact or non-contact) to ensure compliance with ISO 10110-4 dimensional tolerance requirements (e.g., IT4-IT6 grade for high-precision lenses). Suitable for batch inspection of various optical lenses.
• Optical Comparator/Profile Projector: Uses optical projection principles to magnify and display the contour of optical lenses, facilitating quick inspection of edge shape, chamfer size, and surface defects. It is widely used for preliminary inspection of small-batch lenses and rapid judgment of unqualified products.

3. Environmental Reliability Testing Equipment

• High/Low Temperature Test Chamber & Thermal Shock Chamber: Tests the temperature resistance and thermal stability of optical lenses. Simulates harsh environments such as high temperature (85°C), low temperature (-40°C), and rapid temperature changes to verify that lens dimensions and optical performance remain stable (complying with ECE R112 automotive standards). Suitable for automotive, industrial, and outdoor optical lenses.
• Humidity Test Chamber: Conducts high-temperature and high-humidity aging tests (e.g., 85°C, 85% RH) to check the moisture resistance of optical lenses and coatings. Prevents coating peeling, lens deformation, or transmittance reduction caused by humidity, ensuring long-term reliability in humid environments.
• Vibration Test Bench: Tests the vibration resistance of optical lenses, simulating road vibration for automotive lenses or transportation vibration. Ensures that lens assembly structure and optical performance are not damaged under vibration, complying with automotive and industrial reliability requirements.

4. Special Inspection Equipment for Industry-Specific Lenses

• Automotive Lighting Test Bench: Specialized for testing automotive optical lenses (headlights, taillights), verifying light distribution, luminous intensity, and color temperature. Complies with ECE R112 and FMVSS 108 standards, ensuring that the light beam meets driving safety requirements (e.g., low-beam cutoff line, high-beam long-range illumination).
• Medical Endoscope Optical Tester: Tests the imaging quality of medical endoscope lenses, including resolution, field of view, and distortion. Ensures clear imaging for clinical diagnosis, complying with ISO 13485 and medical device safety standards.
• AR/VR Lens FOV Tester: Measures the field of view (FOV) and eye box of AR/VR headset lenses, verifying the visual experience and image clarity at different viewing angles. Ensures that the lens meets the immersive visual requirements of AR/VR products.