Optics and photonics. Quality evaluation of optical systems. Determination of distortion1 Scope This International Standard specifies methods of determining distortion in optical systems for the purposes of quality evaluation. It applies to optical imaging systems in the optical spectral range from 100 nm to 15 000 nm which, by their design, aim at a rotationally symmetric image geometry. It is applicable to electro optical imaging systems provided that adequate rotational symmetry of the image is guaranteed. It does not, therefore,

Safety requirements check is necessary for delivering a better quality product

NOTE 2 The relationship between an equipment category (hereafter referred to as category) and the corresponding zone (area classification) is shown in informative Annex B

BS EN 61069-5:2016 replaces IEC 61069-5:1994

— with mechanical or magnetic bearings

Alkyl amidopropyl betaine is an amphoteric surfactant and the most common representative of the betaine type surfactants

This European standard assists its users to identify suitable timber structures for their construction projects

LPG equipment suppliers

2   This guide establishes the minimum training standard for an endorsed Basic Rope Rescuer as related to general

Data broadcasting team

The messages it specifies support the communication of partial

design principles

Note: Permissible values for deflection are not given