IEC 62595-2-5:2021 specifies the measurement methods for measuring the optical characteristics of convex and concave cylindrical light sources. These non-planar light sources (NPLSs) can have either a continuous, distinct, segmented or block-wised light radiating surface, for example OLED panels, integrated LEDs, integrated mini-LEDs, micro-LEDs, laser diodes, each being either monochromatic or polychromatic.<\/p>\n
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| 2<\/td>\n | undefined <\/td>\n<\/tr>\n | ||||||
| 4<\/td>\n | CONTENTS <\/td>\n<\/tr>\n | ||||||
| 7<\/td>\n | FOREWORD <\/td>\n<\/tr>\n | ||||||
| 9<\/td>\n | INTRODUCTION <\/td>\n<\/tr>\n | ||||||
| 10<\/td>\n | 1 Scope 2 Normative references <\/td>\n<\/tr>\n | ||||||
| 11<\/td>\n | 3 Terms, definitions, abbreviated terms and letter symbols 3.1 Terms and definitions 3.2 Abbreviated terms <\/td>\n<\/tr>\n | ||||||
| 12<\/td>\n | 3.3 Letter symbols (quantity symbols\/unit symbols) Tables Table 1 \u2013 Letter symbols (quantity symbols\/unit symbols) <\/td>\n<\/tr>\n | ||||||
| 13<\/td>\n | 4 Measurement devices 4.1 General 4.2 Spot-type light measuring device Figures Figure 1 \u2013 Cartesian and spherical coordinate systems for NPLS measurement <\/td>\n<\/tr>\n | ||||||
| 14<\/td>\n | 4.3 Spectroradiometer (spectral radiance-meter) 4.4 Electrical measurement devices 4.4.1 Current meter Figure 2 \u2013 Example of LMD with the viewing area surrounding the measurement field <\/td>\n<\/tr>\n | ||||||
| 15<\/td>\n | 4.4.2 Voltage meter 4.5 Luminous flux measurement devices 4.5.1 General 4.5.2 Luminous flux Figure 3 \u2013 Current and voltage measurements using an ammeter between points C and D and a voltage meter between points A and B <\/td>\n<\/tr>\n | ||||||
| 16<\/td>\n | Figure 4 \u2013 Geometry of 4\u03c0-sphere measurement <\/td>\n<\/tr>\n | ||||||
| 17<\/td>\n | 4.5.3 Sample stage 5 General measuring conditions 5.1 Standard conditions Figure 5 \u2013 Measuring points on convex and concave DUTs based on the setups of Figure 4 Figure 6 \u2013 Example of a mirror type goniometric system <\/td>\n<\/tr>\n | ||||||
| 18<\/td>\n | 5.2 Darkroom conditions 5.3 Measurement setup 5.4 Setting the electrical characteristics of measurement devices 5.4.1 Conditions 5.4.2 Current 5.4.3 Voltage 5.4.4 Power <\/td>\n<\/tr>\n | ||||||
| 19<\/td>\n | 5.4.5 Warm-up time 6 Optical measurement methods 6.1 General 6.2 Conditions 6.3 Perceptual visual quality 6.3.1 General 6.3.2 Procedures <\/td>\n<\/tr>\n | ||||||
| 20<\/td>\n | 6.4 Lateral and directional scanning configuration 6.4.1 General 6.4.2 Lateral scanning configuration <\/td>\n<\/tr>\n | ||||||
| 21<\/td>\n | Figure 7 \u2013 Planar LS and cylindrical LS (NPLS) in lateral scanning measurement arrangements <\/td>\n<\/tr>\n | ||||||
| 22<\/td>\n | 6.4.3 Directional scanning configuration <\/td>\n<\/tr>\n | ||||||
| 23<\/td>\n | Figure 8 \u2013 Planar LS and cylindrical LS (NPLS) in a directional scanning arrangement <\/td>\n<\/tr>\n | ||||||
| 24<\/td>\n | 6.5 Depth-of-field and depth-of-focus in measurement 6.5.1 General 6.5.2 Front and rear depth-of-field (DoF) Figure 9 \u2013 Pictorial illustration of depth-of-field, depth-of-focus and circle of confusion for an LMD <\/td>\n<\/tr>\n | ||||||
| 25<\/td>\n | 6.5.3 Front and rear depth-of-focus (dof) 6.6 Measurement procedures 6.6.1 General 6.6.2 Cylindrical LS mounting for lateral measurements Figure 10 \u2013 Rear depth-of-field in the measurement setup of a cylindrical light source <\/td>\n<\/tr>\n | ||||||
| 26<\/td>\n | 6.6.3 Lateral luminance 6.6.4 Lateral luminance uniformity <\/td>\n<\/tr>\n | ||||||
| 27<\/td>\n | 6.6.5 Lateral chromaticity and chromaticity variation 6.6.6 Directional luminance <\/td>\n<\/tr>\n | ||||||
| 28<\/td>\n | 6.6.7 Directional luminance variations 6.6.8 Directional chromaticity and chromaticity variation <\/td>\n<\/tr>\n | ||||||
| 29<\/td>\n | 6.6.9 Luminous flux <\/td>\n<\/tr>\n | ||||||
| 32<\/td>\n | 7 Precautions 7.1 Remarks <\/td>\n<\/tr>\n | ||||||
| 33<\/td>\n | 7.2 Further remarks 7.2.1 General 7.2.2 Report <\/td>\n<\/tr>\n | ||||||
| 34<\/td>\n | Annexes Annex A (informative) Measurement field on the curved light source A.1 General A.2 NPLS curvature and measurement field Figure A.1 \u2013 Schematic diagram of the optical characteristics measurement of planar, convex and concave cylindrical light source <\/td>\n<\/tr>\n | ||||||
| 35<\/td>\n | A.3 MFs on planar, convex and concave cylindrical LSs <\/td>\n<\/tr>\n | ||||||
| 37<\/td>\n | Annex B (informative) Planar light source measurement B.1 General B.2 Luminance meter and measurement field Table B.1 \u2013 Example of a measurement result <\/td>\n<\/tr>\n | ||||||
| 38<\/td>\n | Annex C (informative) Contours of light measurement fields on planar, cylindrical convex, and concave light sources C.1 General C.2 MF contour on a non-tilt and tilt planar DUT Figure C.1 \u2013 Geometry of intersections of a cone anda plane in non-tilt and tilt conditions <\/td>\n<\/tr>\n | ||||||
| 39<\/td>\n | C.3 Projection of an MF contour on the outer surface of a cylindrical DUT Figure C.2 \u2013 Expanded plane of a cone and intersection lines with tilt and non-tilt planes (see Figure C.1) Figure C.3 \u2013 Simulated intersections of three planar light sources with a cone (measurement field angle, i.e., a solid angle) <\/td>\n<\/tr>\n | ||||||
| 40<\/td>\n | Figure C.4 \u2013 Geometry for calculating the intersection of a cone (measurement field angle; solid angle) and a cylinder (light source) Figure C.5 \u2013 Intersection of a cone and a cylindrical DUT <\/td>\n<\/tr>\n | ||||||
| 42<\/td>\n | Figure C.6 \u2013 Measurement of a convex cylindrical LS and the possible cases, and illustration of the effect of the measurement field angle cone and the angleof inclination of the measurement direction <\/td>\n<\/tr>\n | ||||||
| 43<\/td>\n | Annex D (informative) LMD aperture and inclination angle on a cylindrical light source D.1 General D.2 Inclination angle Figure D.1 \u2013 Measurement of a cylindrical light source fora non-zero aperture LMD and fixed measurement field (b) <\/td>\n<\/tr>\n | ||||||
| 44<\/td>\n | D.3 Inclination angle variation Figure D.2 \u2013 Variation of inclination angle, (D, with DLMD for each cylindrical LS of radius R <\/td>\n<\/tr>\n | ||||||
| 45<\/td>\n | D.4 Depth-of-field Figure D.3 \u2013 Variation of rear DoF with DLMD (for measurement field angles of 2\u00b0, 1\u00b0, 0,2\u00b0, 0,1\u00b0) for zero aperture LMD Table D.1 \u2013 Variation of inclination angles with half of the MF size; b\/2 <\/td>\n<\/tr>\n | ||||||
| 47<\/td>\n | D.5 Measurement field size on the cylindrical light source Figure D.4 \u2013 Rear DoF variations with measurement distance DLMD, for light source of R2 (R = 20 mm, 35 mm, 50 mm) in Annex A <\/td>\n<\/tr>\n | ||||||
| 49<\/td>\n | Figure D.5 \u2013 Variation of measurement field with DLMD for cylindrical light sources of radii (=R2) R = 20 mm, 35 mm, 50 mm, and measurement field angles of \u03b2 = 2\u00b0, 1\u00b0, 0,2\u00b0, 0,1\u00b0 <\/td>\n<\/tr>\n | ||||||
| 51<\/td>\n | Figure D.6 \u2013 Difference in variation of MF with DLMD for radii (=R2) R = 20 mm, 35 mm, 50 mm <\/td>\n<\/tr>\n | ||||||
| 52<\/td>\n | Bibliography <\/td>\n<\/tr>\n<\/table>\n","protected":false},"excerpt":{"rendered":" Display lighting unit – Measurement method for optical quantities of non-planar light sources<\/b><\/p>\n |