ISO 15902:2019 pdf download – Optics and photonics – Diffractive optics – Vocabulary
1 Scope
This document defines the basic terms for diffractive optical elements for free space propagation. The purpose of this document is to provide an agreed-upon common terminology that reduces ambiguity and misunderstanding and thereby aid in the development of the field of diffractive optics.
2 Normative references
There are no normative references in this document.
3 Terms and definitions
For the purposes of this document, the following terms and definitions apply.
ISO and IEC maintain terminological databases for use in standardization at the following addresses:
— ISO Online browsing platform: available at http:// www .iso .org/ obp
— IEC Electropedia: available at http:// www .electropedia .org/
3.1 Diffractive optics technologies
3.1.1 diffractive optics
optical technology based on the phenomenon of the diffraction of optical radiation
3.1.2 binary optics
diffractive optics technology whose optical components have a quantized surface structure in height
Note 1 to entry: The word binary originally means a two-step structure in cross section, however, a staircase structure in cross section is usually referred to as binary as well, regardless of the number of the steps. This incorrect wording originates from the fact that these structures are fabricated using a mask lithography technique.
Note 2 to entry: See 3.3.2.8 and 3.3.2.9.
3.1.3 holographic optics
diffractive optics technology that uses holograms as optical elements for transforming an incident wavefront into a specific wavefront or wavefronts
3.2 Diffractive optical elements and their types
3.2.1 diffractive optical element
DOE
optical element for which the phenomenon of the diffraction of optical radiation is the operating principle, usually characterized in terms of its periodic spatial structure
3.2.2 amplitude diffractive optical element
optical element which utilizes the diffraction created by its periodic spatial amplitude modulation
3.2.3 phase diffractive optical element
optical element which utilizes the diffraction created by its periodic spatial phase modulation
3.2.4 transmission diffractive optical element
diffractive optical element that operates with transmitted optical radiation
3.2.5 reflection diffractive optical element
diffractive optical element that operates with reflected optical radiation
3.2.6 active diffractive optical element
diffractive optical element whose diffraction characteristics can be dynamically changed
3.2.7 holographic optical element
HOE
diffractive optical element fabricated with an interferometric method
3.2.8 computer-generated diffractive optical element
computer-generated hologram (CGH)
diffractive optical element which is computer-designed and fabricated under computer control
Note 1 to entry: A computer-generated diffractive optical element is generally fabricated using a mechanical method or by lithography, using optical radiation waves (including laser beams), electron beams or ion beams, and is often referred to as a “computer-generated hologram (CGH)”.
3.2.9 binary optical element
BOE
phase-diffractive optical element having a binary-level or quantized multi-level surface-relief structure
Note 1 to entry: See Note 1 to entry in 3.1.2.
3.3 Structure of diffractive optical elements
3.3.1 General structure
3.3.1.1 substrate for diffractive optical elements
basic body of the diffractive optical element
Note 1 to entry: It may support the element’s periodic structure on its surface, or it may contain that periodic structure within itself.