BS IEC 62906-5-6:2020
$142.49
Laser displays – Measuring methods for optical performance of projection screens
| Published By | Publication Date | Number of Pages |
| BSI | 2020 | 26 |
IEC 62906-5-6:2020 (E) specifies the standard measurement conditions and measuring methods for determining the optical performance of a projection screen in terms of its photometric characteristics, including screen gain and speckle contrast, from different viewing directions. These methods are only applied for the case in which the projection screen and a laser projector are integrated and used with a fixed configuration as a set to create a real image. Both front and rear projection screens, with a flat surface, are included. This document excludes projection screens which are classified as optically see-through screens, including head-up displays.
PDF Catalog
| PDF Pages | PDF Title |
|---|---|
| 2 | undefined |
| 4 | CONTENTS |
| 6 | FOREWORD |
| 8 | 1 Scope 2 Normative references 3 Terms, definitions, and abbreviated terms 3.1 Terms and definitions |
| 9 | 3.2 Abbreviated terms 4 Standard measuring conditions 4.1 General 4.2 Environmental conditions 4.3 Power supply 4.4 Warm-up time |
| 10 | 4.5 Measurement coordinate system 4.6 Darkroom conditions 4.7 Measuring facilities Figures Figure 1 – Coordinate system for projection direction and viewing direction |
| 11 | 5 Installation and adjustment of the DUT 5.1 Placement of the projector and the screen 5.2 Focusing of the projector |
| 12 | 5.3 Standard projector setup conditions 5.4 Standard image measurement locations Figure 2 – Example of image pattern with horizontal size H and vertical size V used for alignment |
| 13 | 6 Signal patterns Figure 3 – Standard measurement locations on the screen (nine measurement points) Figure 4 – Example of DUT setup Figure 5 – Full screen patterns |
| 14 | 7 Measuring methods 7.1 Screen gain 7.1.1 Purpose 7.1.2 Measuring equipment and conditions |
| 15 | 7.1.3 Measuring methods 7.2 Screen gain directivity and half-gain angle 7.2.1 Purpose Figure 6 – Measuring geometry of screen gain |
| 16 | 7.2.2 Measuring conditions 7.2.3 Measuring methods 7.3 Screen gain uniformity 7.3.1 Purpose Figure 7 – Viewing direction measurement in both horizontal and vertical directions |
| 17 | 7.3.2 Measuring conditions 7.3.3 Measuring methods 7.4 Angular characteristics of speckle contrast 7.4.1 Purpose 7.4.2 Measuring conditions |
| 18 | 7.4.3 Measuring methods Figure 8 – Measuring geometry of speckle contrast with changing viewing direction |
| 19 | Annex A (informative)Screen colour shift A.1 Purpose A.2 Measuring conditions A.3 Measuring methods |
| 20 | Annex B (informative)Screen directivity using a Fresnel lens Figure B.1 – Directivity of the screen under different setups |
| 22 | Annex C (informative)Angular characteristics of speckle contrast with different screens Figure C.1 – Optical configuration for speckle contrast measurementwith different viewing directions Figure C.2 – Angular characteristics of speckle contrast obtainedfrom different screen and different de-speckle conditions |
| 24 | Bibliography |
