BS IEC 62906-5-4:2018
$198.66
Laser display devices – Optical measuring methods of colour speckle
| Published By | Publication Date | Number of Pages |
| BSI | 2018 | 54 |
PDF Catalog
| PDF Pages | PDF Title |
|---|---|
| 2 | undefined |
| 4 | CONTENTS |
| 7 | FOREWORD |
| 9 | 1 Scope 2 Normative references 3 Terms, definitions, letter symbols and abbreviated terms 3.1 Fundamental terms 3.2 Terms related to colour speckle distribution |
| 10 | 3.3 Terms related to spatial variation 3.4 Letter symbols |
| 11 | 3.5 Abbreviated terms 4 Theory of colour speckle 4.1 General 4.2 Mechanism for generating colour speckle |
| 13 | 5 Calculation methods of colour speckle 5.1 General |
| 14 | 5.2 Measuring method of spectral behaviour of BGR light sources 5.3 Target chromaticity Figures Figure 1 – Two speckle measuring methods and their flow charts |
| 15 | Figure 2 – Target chromaticity and colour gamut Figure 3 – SB,G,R(λ) with an FWHM of 2 nm |
| 16 | 5.4 Adjustment of BGR power ratio |
| 17 | 5.5 Calculation method (a) using BGR speckle contrast Cs-B, Cs-G, Cs-R 5.5.1 General Figure 4 – Adjustment method of BGR power ratio |
| 18 | 5.5.2 Examples of measured distributions Figure 5 – Colour speckle distribution for CsB = 100 %, CsG = 100 %, CsR = 100 % |
| 19 | Figure 6 – Photometric speckle distribution for CsB = 100 %, CsG = 100 %, CsR = 100 % |
| 20 | Figure 7 – Colour speckle distribution for CsB = 50 %, CsG = 50 %, CsR = 50 % Figure 8 – Photometric speckle distribution for CsB = 50 %, CsG = 50 %, CsR = 50 % |
| 21 | Figure 9 – Colour speckle distribution for CsB = 10 %, CsG = 10 %, CsR = 10 % |
| 22 | 5.6 Evaluation metrics Figure 10 – Photometric speckle distribution for CsB = 10 %, CsG = 10 %, CsR = 10 % |
| 23 | 5.7 Calculation method (b) using the measured spatial distribution of BGR monochromatic speckles 5.7.1 General 5.7.2 Examples of measured distributions Tables Table 1 – Values of measurement metrics for the calculated examples |
| 24 | Figure 11 – Colour speckle distribution for CsB = 9,2 %, CsG = 9,7 %,CsR = 9,2 % obtained by method (b) |
| 25 | 5.7.3 Comparison between methods (a) and (b) Figure 12 – Colour speckle distribution for CsB = 9,2 %, CsG = 19,2 %,CsR = 23,2 % obtained by method (b) |
| 26 | Figure 13 – Colour speckle distribution for CsB = 9,2 %, CsG = 9,7 %,CsR = 9,2 % obtained by method (a) Figure 14 – Colour speckle distribution for CsB = 9,2 %, CsG = 19,2 %,CsR = 23,2 % obtained by method (a) |
| 27 | 5.7.4 Elimination of the background effects Table 2 – Values of measurement metrics for the examples in Figure 11 to Figure 14 |
| 28 | Figure 15 – Raw data of BGR speckle distributions (upper row) and post-processed data (lower row) for BGR monochromatic speckles (left: B, centre: G, right: R) Figure 16 – Colour speckle distribution directly using the raw data in Figure 15 |
| 29 | Figure 17 – Colour speckle distribution for CsB = 16,2 %, CsG = 17,4 %, CsR = 17,3 % obtained by indirect measuring method (a) Table 3 – Values of measurement indices for the examples in Figure 16 and Figure 17 |
| 30 | 5.8 Error analysis based on data size Figure 18 – Calculated average chromaticity values of the colour speckle distribution with respect to data size for CsB = CsG = CsR = 80 % |
| 31 | Figure 19 – Calculated average values of the normalized speckle illuminance speckle distribution and the normalized monochromatic speckle intensity distribution with respect to data size for CsB = CsG = CsR = 80 % Figure 20 – Calculated average chromaticity values of the colour speckle distribution with respect to data size for CsB = CsG = CsR = 60 % |
| 32 | Figure 21 – Calculated average values of the normalized speckle illuminance speckle distribution and the normalized monochromatic speckle intensity distribution with respect to data size for CsB = CsG = CsR = 60 % Figure 22 – Calculated average chromaticity values of the colour speckle distribution with respect to data size for CsB = CsG = CsR = 40 % |
| 33 | Figure 23 – Calculated average values of the normalized speckle illuminance speckle distribution and the normalized monochromatic speckle intensity distribution with respect to data size for CsB = CsG = CsR = 40 % Figure 24 – Calculated average chromaticity values of the colour speckle distribution with respect to data size for CsB = CsG = CsR = 20 % |
| 34 | 6 Direct measuring methods of colour speckle 6.1 General Figure 25 – Calculated average values of the normalized speckle illuminance speckle distribution and the normalized monochromatic speckle intensity distribution with respect to data size for CsB = CsG = CsR = 20 % |
| 35 | 6.2 Fundamental design of LMD for colour speckle measurement Figure 26 – Example of LMDs using XYZ filters for colour speckle measurement |
| 36 | 6.3 Colour speckle measuring method using LMD with XYZ filters Figure 27 – Example of LMDs using BGR filters for colour speckle measurement |
| 37 | 6.4 Colour speckle measuring method using LMD with BGR filters Figure 28 – Example of measurement geometriesfor colour speckle using an LMD with XYZ filters |
| 38 | 7 Measuring methods related to spatial variation 7.1 General 7.2 Angular colour speckle variation Figure 29 – Example of measurement geometriesfor colour speckle using an LMD with BGR filters |
| 39 | 7.3 Photometric speckle contrast uniformity/non-uniformity Figure 30 – Representation of the viewing direction, or direction of measurement, defined by the angle of inclination θ, and the angle of rotation (azimuth angle ( )in a polar coordinate system |
| 40 | 7.4 Colour speckle variance/covariance non-uniformity |
| 41 | Annex A (informative) Complementary explanation of colour speckle Figure A.1 – Photograph of colour speckle |
| 42 | Annex B (informative) Examples of colour speckle distributions B.1 Colour speckle distributions (one of the BGR: 90 %, the others: 1 %) Figure B.1 – Colour speckle distribution for CsB = 90 %, CsG = 1 %, CsR = 1 % |
| 43 | Figure B.2 – Photometric speckle distribution for CsB = 90 %, CsG = 1 %, CsR = 1 % |
| 44 | Figure B.3 – Colour speckle distribution for CsB = 1 %, CsG = 90 %, CsR = 1 % Figure B.4 – Photometric speckle distribution for CsB = 1 %, CsG = 90 %, CsR = 1 % |
| 45 | B.2 Colour speckle distributions (two of the BGR: 90 %, the other: 1 %) Figure B.5 – Colour speckle distribution for CsB = 1 %, CsG = 1 %, CsR = 90 % Figure B.6 – Photometric speckle distribution for CsB = 1 %, CsG = 1 %, CsR = 90 % |
| 46 | Figure B.7 – Colour speckle distribution for CsB = 90 %, CsG = 1 %, CsR = 90 % |
| 47 | Figure B.8 – Photometric speckle distribution for CsB = 90 %, CsG = 1 %, CsR = 90 % Figure B.9 – Colour speckle distribution for CsB = 1 %, CsG = 90 %, CsR = 90 % |
| 48 | Figure B.10 – Photometric speckle distribution for CsB = 1 %, CsG = 90 %, CsR = 90 % Figure B.11 – Colour speckle distribution for CsB = 90 %, CsG = 90 %, CsR = 1 % |
| 49 | Figure B.12 – Photometric speckle distribution for CsB = 90 %, CsG = 90 %, CsR = 1 % |
| 50 | Annex C (informative) Calibration of XYZ errors C.1 General C.2 Formulation of XYZ mismatches |
| 51 | Figure C.1 – Deviated values (marker points) and ideal colour matching functions Figure C.2 – Correct plot by spectral measurements and plot with XYZ errors Table C.1 – Mismatch coefficients |
| 52 | C.3 Calibration of the mismatched XYZ errors using the true BGR chromaticity values |
| 53 | Bibliography |
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