Standard No.:	GB/T 43590.102-2023
English Name:	Laser display devices—Part 1-2：Vocabulary and letter symbols
Chinese Name:	激光显示器件 第1-2部分：术语及文字符号
Chinese Classification:	L53    Semiconductor emitting device
Professional Classification:	GB    National Standard
Source Content Issued by:	SAMR; SAC
Issued on:	2023-12-28
Implemented on:	2024-4-1
Status:	valid
Target Language:	English
File Format:	PDF
Word Count:	7500 words
Translation Price(USD):	225.0
Delivery:	via email in 1~3 business day

Laser display devices - Part 1-2: Vocabulary and letter symbols 1 Scope This document gives the preferred terms, their definitions and symbols for laser display devices and relevant components This document is applicable to laser display devices that use lasers as light sources. 2 Normative references There are no normative references for this document. 3 Terms and definitions 3.1 Classification of terms Terms for laser display devices and relevant components are classified as follows: a) fundamental terms; b) terms related to speckle; c) terms related to display category; d) terms related to optical devices; e) terms related to light sources. 3.2 Fundamental terms 3.2.1 laser display device; LDD display device using a laser or lasers, based on stimulated emission 3.2.2 hybrid laser display device; hybrid LDD; h-LDD display device using both a laser or lasers and spontaneous emission-based light sources 3.3 Terms related to speckle 3.3.1 speckle irregularly aligned spatially-modulated image created by coherent or partially coherent lights as a result of interference on a sensor plane of the visual sensory system of the observer Note: For a human observer, the sensor plane of the visual sensory system is the retina of the eye. 3.3.2 monochromatic speckle speckle when the light source is monochromatic or quasi-monochromatic 3.3.3 colour speckle speckle when the light source is multi-coloured 3.3.4 speckle pattern illuminance distribution of speckle 3.3.5 speckle contrast ratio; speckle contrast; SCR Cs ratio of the illuminance standard deviation to the average of the speckle pattern in the measurement field Note: See Clause A.3 for further information. [SOURCE: J.W. GOODMAN, Speckle Phenomena in Optics: Theory and Applications (Roberts and Company Publishers, Colorado, 2006)] 3.3.6 signal to noise ratio < speckle-oriented noise> inverse of the speckle contrast ratio 3.3.7 objective speckle speckle observed by an optical sensory system without imaging optics Note: See Clause A.1 for further information. [SOURCE: M. KURASHIGE et al., The evaluation of speckle contrast with variable speckle generator, J. Soc. Info. Display 19/9, 631-638 (2011)] 3.3.8 subjective speckle speckle observed by a visual sensory system with imaging optics Note: See Clause A.2 for further information. [SOURCE: M. KURASHIGE et al., The evaluation of speckle contrast with variable speckle generator, J. Soc. Info. Display 19/9, 631-638 (2011)] 3.3.9 projected speckle subjective speckle arising from a projected interference pattern created by coherent or partially coherent light on a screen Note: See Clause A.2 for further information. [SOURCE: M. KURASHIGE et al., “Classification of subjective speckle for evaluation of laser display”, SID Symposium Digest 45, 419-422 (2014)] 3.3.10 screen speckle subjective speckle arising from the scattering or diffusion of coherent or partially coherent light on a screen Note: See A.2 for further information. [SOURCE: M. KURASHIGE et al., “Classification of subjective speckle for evaluation of laser display”, SID Symposium Digest 45, 419-422 (2014)] 3.3.11 speckle grain size spacing of interference fringes generated by coherent or partial coherent beams on a sensor plane of a visual sensory system 3.3.12 minimum objective speckle grain size Sobj minimum spacing of interference fringes which is determined by the interference of two coherent beams from the opposite edges of the illuminated area to the sensor plane Note: See Clause A.1 for further information. 3.3.13 minimum subjective speckle grain size Ssubj minimum spacing of interference fringes which is determined by the interference of two coherent beams from the opposite edges of the effective diameter of imaging optics to the sensor plane Note: See Clause A.2 for further information. 3.4 Terms related to display category 3.4.1 raster-scanned projection image projection (on a screen or a projection plane) by raster-scanning laser beams 3.4.2 full-frame projection image projection (on a screen or a projection plane) by a 2D spatial light modulator 3.4.3 line-scanned projection image projection (on a screen or a projection plane) by a combination of a 1 D spatial light modulator and a 1 D optical scanner 3.4.4 front projection image projection (on a screen or a projection plane) from the same side as the observer 3.4.5 rear projection image projection (on a screen or a projection plane) from the side opposite to that of the observer