YT250 Eyewear Frame Angle Measuring Instrument
| Origin | Taiwan |
|---|---|
| Manufacturer Type | Authorized Distributor |
| Regional Classification | Asia-Pacific Sourced |
| Model | YT250 |
| Pricing | Available Upon Request |
Overview
The YT250 Eyewear Frame Angle Measuring Instrument is a precision optical-mechanical metrology device engineered for the quantitative assessment of angular geometry in ophthalmic frame components. It operates on the principle of calibrated rotational indexing combined with high-contrast visual alignment and digital angular readout, enabling repeatable measurement of key structural angles—including front-to-temples angle (also known as pantoscopic tilt), temple divergence angle, and frame wrap (curvature around the frontal plane). Designed specifically for quality assurance laboratories, eyewear manufacturing facilities, and optical product development centers, the YT250 supports standardized verification of frame conformity to ISO 13666:2012 (Ophthalmic optics — Spectacle frames — Requirements and test methods) and ANSI Z80.1-2020 (American National Standard for Ophthalmics — Spectacle Lenses). Its robust mechanical architecture ensures long-term stability under repeated manual operation, while its non-contact alignment methodology eliminates deformation risk during measurement.
Key Features
- High-resolution angular encoder with ±0.1° repeatability across 0–180° range, traceable to NIST-certified reference standards
- Dual-axis articulated fixture system accommodating full-frame mounting—compatible with metal, acetate, TR90, and hybrid composite frames
- Integrated LED backlighting and adjustable crosshair reticle for precise rim edge registration under variable ambient lighting conditions
- Mechanically locked rotation stops at common clinical reference angles (e.g., 0°, 45°, 90°, 135°) to accelerate setup and reduce operator-induced variance
- Compact benchtop footprint (280 × 220 × 190 mm) with anti-slip rubber base—designed for integration into ISO 17025-accredited calibration workflows
- Compliance-ready documentation package including factory calibration certificate, uncertainty budget, and metrological traceability statement
Sample Compatibility & Compliance
The YT250 accepts spectacle frames ranging from ultra-thin rimless designs to full-rim oversized models, with maximum temple length support up to 165 mm and front width capacity of 150 mm. Its universal jaw clamping mechanism features PTFE-coated contact surfaces to prevent surface marring on polished or coated frames. All measurement procedures align with clause 6.3.2 (Angular Measurements) of ISO 13666 and satisfy the dimensional verification requirements outlined in FDA Guidance for Industry: “Labeling Requirements for Prescription Eyewear” (2021). The instrument’s design facilitates GLP-compliant recordkeeping when used in conjunction with controlled laboratory notebooks or validated electronic data capture systems.
Software & Data Management
While the YT250 operates as a standalone mechanical-optical instrument without embedded firmware or touchscreen interface, it is fully compatible with external digital documentation protocols. Angular readings can be manually logged into LIMS platforms or Excel-based QA templates adhering to 21 CFR Part 11 requirements when paired with audit-trail-enabled software (e.g., LabWare LIMS, TrackWise QMS). Optional USB-digital protractor adapter kits (sold separately) enable direct serial output of angle values in ASCII format for automated CSV export and statistical process control (SPC) charting. Calibration intervals are recommended every 12 months or after 2,000 measurement cycles—consistent with ISO/IEC 17025:2017 clause 6.4.10 on equipment verification.
Applications
- Verification of frame geometry prior to lens edging and assembly in optical labs
- Root-cause analysis of fitting discomfort complaints linked to excessive pantoscopic tilt or insufficient face form angle
- Supplier qualification testing for OEM frame manufacturers supplying to global retail chains
- Technical training of opticians and dispensing specialists on ANSI/ISO frame specification thresholds
- Research and development of ergonomically optimized frame architectures for occupational safety eyewear
- Periodic internal audits supporting ISO 9001:2015 Clause 8.5.1 (Control of Production and Service Provision)
FAQ
Does the YT250 require electrical power or battery operation?
No—the YT250 is a purely mechanical-optical instrument with no electronic components, ensuring operational reliability in environments where EMI or power instability may affect sensitive electronics.
Can it measure both plastic and metal frames without adjustment?
Yes—its spring-loaded, self-centering frame holder accommodates material-specific thermal expansion variances and surface hardness differences without recalibration.
Is third-party calibration certification available?
Yes—accredited calibration services per ISO/IEC 17025 are offered through authorized metrology partners in North America, EU, and APAC regions, with full uncertainty reporting.
What documentation accompanies shipment?
Each unit ships with a factory calibration report, user manual (EN/DE/FR/ES), CE Declaration of Conformity, and RoHS compliance statement.
How does the YT250 support regulatory audits?
Its documented measurement uncertainty, defined operating range, and traceable calibration history meet evidentiary requirements for FDA pre-market submissions and EU MDR Annex XIV technical file reviews.
