SIST EN 2155-7:2001

Aerospace series - Test methods for transparent materials for aircraft glazing - Part 7: Determination of optical deviation

This standard specifies the method used for the determination of optical deviation caused to beam of light passing through a transparent element materialperpendicular to the optical axis of the system.

Luft- und Raumfahrt - Prüfverfahren für transparente Werkstoffe zur Verglasung von Luftfahrzeugen - Teil 7: Bestimmung der optischen Ablenkung

Diese Norm legt das Verfahren zur Bestimmung der optischen Ablenkung fest, die an einem Lichtstrahl auftritt, der durch ein Formteil aus transparentem Werkstoff fällt, das senkrecht zur optischen Achse des Systems steht.

Série aérospatiale - Méthodes d'essais pour matériaux transparents pour vitrages aéronautiques - Partie 7: Détermination de la déviation optique

La présente norme spécifie la méthode de détermination de la déviation optique d'un rayon lumineux passant à travers un élément de matériau transparent placé perpendiculairement à l'axe optique du système.

Aerospace series - Test methods for transparent materials for aircraft glazing - Part 7: Determination of optical deviation

General Information

• Status: Published
• Publication Date: 31-May-2001
• ICS: 49.045 - Structure and structure elements
• Technical Committee: SS SPL - Technical Board for the general field
• Current Stage: 6060 - National Implementation/Publication (Adopted Project)
• Start Date: 01-Jun-2001
• Due Date: 01-Jun-2001
• Completion Date: 01-Jun-2001
• Ref Project: EN 2155-7:1997 - Aerospace series - Test methods for transparent materials for aircraft glazing - Part 7: Determination of optical deviation

Overview

SIST EN 2155-7:2001 is a key European standard developed by CEN that defines the test method for determining optical deviation in transparent materials used for aircraft glazing. This standard belongs to the aerospace series and specifically addresses how to measure the deviation caused to a beam of light when passing through transparent elements – such as windows and cockpit canopies – perpendicularly to the optical axis.

The accurate assessment of optical deviation is critical to ensure the safety, visibility quality, and performance of aircraft glazing materials. SIST EN 2155-7:2001 provides a reproducible and standardized procedure to quantify this optical property, supporting manufacturers and aviation authorities in quality control and certification processes.

Key Topics

• Scope of Measurement
  Focuses on the determination of optical deviation caused by transparent materials when light passes perpendicularly through the glazing element.

• Test Methodology
  Details the procedures and equipment setup to measure the angular deviation of a light beam, ensuring standardized conditions for reliable results.

• Material Application
  Applies specifically to transparent aerospace glazing materials-including laminated glass and advanced polymers used in aircraft windows and viewing ports.

• Accuracy and Repeatability
  Emphasizes precise measurements to detect small deviations affecting pilot visibility and optical clarity, which are critical in flight operations.

• Compliance and Standardization
  Aligns with the broader aerospace series of standards for transparent materials, serving as a reference for designers, testers, and certification bodies.

Applications

• Aircraft Window Manufacturing
  Ensures glazing materials meet strict optical clarity requirements, minimizing distortions that can impact pilot vision and passenger experience.

• Quality Control Testing
  Enables aerospace manufacturers and suppliers to validate optical performance during production and before installation.

• Maintenance and Inspection
  Supports routine checks on aircraft glazing to detect degradation or damage affecting optical properties over time.

• Product Development
  Assists in the research and development of new transparent materials or coatings with improved optical characteristics.

• Regulatory Certification
  Provides data essential for aviation regulatory compliance confirming materials meet optical standards for safety and functionality.

Related Standards

• EN 2155 Series
  SIST EN 2155-7:2001 is part of a comprehensive collection of test methods covering various properties of transparent materials used in aerospace glazing, offering a holistic framework for material assessment.

• Aerospace Material Standards (CEN)
  Complements standards on mechanical strength, thermal resistance, and environmental durability of aircraft glazing materials.

• ICAO and EASA Guidelines
  Supports compliance with international civil aviation organization guidelines requiring verified optical performance of cockpit and cabin windows.

• ISO Optical Testing Standards
  Aligns with general ISO testing protocols for optical properties to maintain global consistency in measurement techniques.

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By adhering to SIST EN 2155-7:2001, aerospace manufacturers and regulatory agencies ensure aircraft glazing materials deliver optimal optical precision, enhancing safety, reliability, and pilot situational awareness throughout flight operations.

Standards Content (Sample)

2003-01.Slovenski inštitut za standardizacijo. Razmnoževanje celote ali delov tega standarda ni dovoljeno.Aerospace series - Test methods for transparent materials for aircraft glazing - Part 7: Determination of optical deviationLuft- und Raumfahrt - Prüfverfahren für transparente Werkstoffe zur Verglasung von Luftfahrzeugen - Teil 7: Bestimmung der optischen AblenkungSérie aérospatiale - Méthodes d'essais pour matériaux transparents pour vitrages aéronautiques - Partie 7:
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