ISO 14880-4:2024 PDF

Optics and photonics — Microlens arrays — Part 4: Test methods for geometrical properties

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Title (English):

ISO 14880-4:2024

Optics and photonics — Microlens arrays — Part 4: Test methods for geometrical properties

Document status:: Active
Format:: Electronic (PDF)
Number of pages:: 20
Publication date:: November 13, 2024
Edition:: ISO IS 14880 edition 2 version 1
ICS:: 31.260

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Description (English):

This document specifies methods for testing geometrical properties of microlenses in microlens arrays. It is applicable to microlens arrays with very small lenses formed on one or more surfaces of a common substrate and to graded-index microlenses.

Technical details

Technical committee: ISO/TC 172/SC 9 - Laser and electro-optical systems
SKU: ISO 14880-4:2024

Abstract

Overview

ISO 14880-4:2024 - "Optics and photonics - Microlens arrays - Part 4: Test methods for geometrical properties" specifies standardized methods for measuring the geometric characteristics of microlenses in microlens arrays. It applies to arrays of very small lenses formed on one or more surfaces of a common substrate and to graded‑index microlenses. The standard is part of the ISO 14880 series and focuses on metrology methods to ensure compatibility, interchangeability and reliable specification of microlens array components.

Key topics and requirements

Measured parameters: pitch (Px, Py), surface modulation depth (h, also referred to as lens sag), physical thickness (Tc), and radius of curvature (Rc).
Coordinate system: right‑handed Cartesian system with X and Y in the substrate plane and Z outward from the material.
Primary test methods:
- Stylus profilometer: profile acquisition through lens centers; guidance on stylus tip geometry, contact force, environmental control, calibration and avoiding surface damage. Typical tip shapes suggested are conical with spherical tips (cone angles ~60° or 90°, tip radii 1 µm, 2 µm, 5 µm or 10 µm).
- Confocal microscopy: non‑contact surface topography by focus scanning and intensity detection for depth discrimination.
Supporting methods / annexes:
- Annex A: measurement using a Fizeau interferometer system (informative).
- Annex B: analysis of array spacing uniformity (informative).
Measurement conditions and preparation: environmental recommendations (approx. 20 °C ± 5 °C, humidity

Related standards

Mentioned in the description and other ISO standards

Overview

Key topics and requirements

Measured parameters: pitch (Px, Py), surface modulation depth (h, also referred to as lens sag), physical thickness (Tc), and radius of curvature (Rc).
Coordinate system: right‑handed Cartesian system with X and Y in the substrate plane and Z outward from the material.
Primary test methods:
- Stylus profilometer: profile acquisition through lens centers; guidance on stylus tip geometry, contact force, environmental control, calibration and avoiding surface damage. Typical tip shapes suggested are conical with spherical tips (cone angles ~60° or 90°, tip radii 1 µm, 2 µm, 5 µm or 10 µm).
- Confocal microscopy: non‑contact surface topography by focus scanning and intensity detection for depth discrimination.
Supporting methods / annexes:
- Annex A: measurement using a Fizeau interferometer system (informative).
- Annex B: analysis of array spacing uniformity (informative).
Measurement conditions and preparation: environmental recommendations (approx. 20 °C ± 5 °C, humidity

ISO 14880-4:2024 PDF

Technical details

Abstract

Overview

Key topics and requirements

Related standards

Abstract

Overview

Key topics and requirements

Related standards

Optics and photonics - Microlens arrays - Part 2: Test methods for wavefront aberrations (ISO 14880-2:2024)

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