ISO 15902:2019 pdf free

ISO 15902:2019 pdf free.Optics and photonics一Diffractive optics一Vocabulary
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.
diffractive optics technology that uses holograms as optical elements for transforming an incident wavefront into a specific wavefront or wavefronts 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
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)”.
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.
binary phase structure that has more than two phase levels in one period
Note 1 to entry: Multi-level phase structure includes binary phase structure in its definition, however, each term is sometimes used as a synonym of the other.
Note 2 to entry: See Note 1 to entry to 3.1.2.
surface relief diffractive optical element able to concentrate the diffracted optical radiation energy in a specified diffraction order or orders using a prismatic structure in one period
diffractive optical element containing parts that generate different orders of diffraction
Note 1 to entry: When parts form concentric zones, this structure is often referred to either as a harmonic Fresnel structure or a super zone structure.
periodic structure whose period is smaller than λ/n, where n is the refractive index of the structure
Note 1 to entry: Depending on the incident angle, a subwavelength structure may not generate any diffracted optical radiation except for zero-order optical radiation. In this case the element is not a diffractive optical element. It is sometimes referred to as zero-order grating, anti-reflection structured surface or SWS.ISO 15902 pdf free download.