ISO 9767-1990 PDF

Full title and description

Photography — Overhead projectors — Methods for measuring and reporting performance characteristics. This International Standard defines test methods and a reporting format for key performance characteristics of overhead (opaque/transparent) projectors used for lecture and presentation purposes.

Abstract

Specifies methods of measurement for light output (luminous flux and screen illuminance), uniformity of screen illumination, picture‑outline distortion, maximum available projection elevation and temperature rise on the projection stage of overhead projectors, and includes a recommended form for reporting the results. Intended to provide consistent, reproducible test procedures and a standardized presentation of results.

General information

• Status: Withdrawn (withdrawal stage recorded by ISO).
• Publication date: December 1990 (Edition 1, 1990‑12).
• Publisher: International Organization for Standardization (ISO).
• ICS / categories: 37.040.10 — Photographic equipment; projectors.
• Edition / version: 1 (1990).
• Number of pages: 6.

Scope

This standard applies to overhead projectors and specifies the measurement methods and reporting format for performance characteristics that affect image quality and safe operation in instructional and presentation environments. Measured characteristics include luminous output and distribution on a viewing screen, geometric distortion of the projected image, maximum elevation of projection, and the temperature rise on projection stages. It is intended for laboratory and factory testing to allow comparison between models and to verify conformity with purchaser or regulatory requirements.

Key topics and requirements

• Measurement of total light output and screen illuminance under defined operating conditions.
• Assessment of uniformity of illumination across a specified screen area.
• Determination of picture‑outline distortion and its permissible limits for specified projection geometries.
• Measurement of maximum available projection elevation (tilt/angle) and related optical performance.
• Measurement of temperature rise on projection stages and surfaces under specified operating times.
• Specification of test conditions, instruments, and calibration references to ensure repeatability.
• Provision of a standard reporting form to present measured results consistently.

Typical use and users

Used by manufacturers of overhead and presentation projectors, test laboratories, procurement teams specifying equipment for educational or corporate facilities, and standards bodies developing related test protocols. Typical activities include type testing during product development, quality control checks in production, comparative performance evaluations, and verification for procurement acceptance.

Related standards

Standards and documents in the same technical area include other ISO/TC 42 publications on photographic and projection equipment and national adoptions (for example, national standards bodies’ versions that referenced ISO 9767). Because ISO 9767:1990 has been withdrawn, users should consult current ISO/TC 42 work items and more recent projector or audiovisual equipment standards for up‑to‑date test methods.

Keywords

Overhead projector; projector performance; luminous flux; illuminance uniformity; image distortion; projection elevation; temperature rise; test methods; reporting form; ISO 9767:1990.

FAQ

Q: What is this standard?

A: ISO 9767:1990 is an International Standard titled "Photography — Overhead projectors — Methods for measuring and reporting performance characteristics" that defines test methods and a reporting format for overhead projector performance.

Q: What does it cover?

A: It covers measurement procedures for light output and screen illuminance, uniformity of illumination, picture‑outline distortion, maximum projection elevation and temperature rise on projection stages, plus a recommended reporting form for presenting results.

Q: Who typically uses it?

A: Manufacturers, test laboratories, procurement/specification engineers for educational and corporate AV equipment, and standards or conformity assessment organizations use it for product testing, comparison and acceptance.

Q: Is it current or superseded?

A: ISO 9767:1990 has been withdrawn according to the ISO catalogue. The ISO record does not list a direct replacement; users should consult current ISO/TC 42 outputs or national standards for any updated test methods.

Q: Is it part of a series?

A: It falls under ISO/TC 42's scope for photographic equipment and projectors (ICS 37.040.10). It is a standalone test method for overhead projectors rather than a numbered multi‑part series, though related projector and photographic standards exist within the same committee.

Q: What are the key keywords?

A: Overhead projector, projection performance, illuminance, luminous flux, uniformity, distortion, projection elevation, temperature rise, test method, reporting.