Содержание
- 2. Basic concept Moiré pattern is a pattern that occurs when two periodic grids are overlapped.
- 3. Review calculate the number of threads Checking our method for complex fabric dependences(period of the moiré
- 4. Experimental Set-up + accuracy Theory Model IYPT Basic concepts grid Applicability
- 5. Complex weave Two-dimensional structure Denim (jeans fabric) Fabric «Oxford» 5 Experimental Set-up + accuracy Theory Model
- 6. Quality explanation 6 Experimental Set-up + accuracy Theory Model IYPT Applicability
- 7. Geometric Moiré Experimental Set-up + accuracy Theory Model IYPT Applicability
- 8. Физическая модель
- 9. Special case 1 2 9 Experimental Set-up + accuracy Theory Model IYPT Applicability
- 10. Number of threads per 1 cm 1 сm 1 сm 10 Experimental Set-up + accuracy Theory
- 11. Fabric with less period Fabric with bigger period 11 Experimental Set-up + accuracy Theory Model IYPT
- 12. Experimental set-up overlay 0,5мм 0,2мм 0,1мм protractor rulers Screw with nut 12 Experimental Set-up + accuracy
- 13. The calculation of the period of moiré 13 Experimental Set-up + accuracy Theory Model IYPT Applicability
- 14. Direct measurement of the number of threads 14 Experimental Set-up + accuracy Theory Model IYPT Applicability
- 15. Error of set up 15 Experimental Set-up + accuracy Theory Model IYPT Applicability
- 16. Table values at 15 X,мм y,мм overlay, мм The period of moiré,мм Number of threads per
- 17. Dependence of the moiré pattern period on the rotation angle
- 18. Dependence of the moire period on the overlay Optimal is the overlay with a period close
- 19. Comparison between direct and undirect measurement 19 Experimental Set-up + accuracy Theory Model IYPT Applicability
- 20. Comparison between direct and indirect measurement coarse calico 1 coarse calico 2 chintz cambric Sateen denim
- 21. Applicability of designed overlay Intensity colour contrast distance 21 Experimental Set-up + accuracy Theory Model IYPT
- 22. Set up with improved resolution overlay Receive images laser 0,55м 800 kilo lux-sensor of (order of
- 23. Limitations of the visibility of a moiré pattern Angular resolution Critical angle
- 24. Applicability of designed overlay We don’t see the moiré pattern(the distance between our eyes or camera
- 25. Applicability of designed overlay 25 Experimental Set-up + accuracy Theory Model IYPT Applicability
- 26. The influence of the distance The angle, which our eyes(or camera) see the overlay at, decreases
- 27. The applicability of our method Value contrast C is the value that provide the transparent and
- 28. Dependence of the moire period on the thickness of the overlay`s line The thickness affects the
- 29. Novelty We know the period of the fabric and the moiré from the obtained equations. 29
- 30. Comparison for the thickness of the threads Thickness of the thread, mm Different fabrics
- 31. For different colours 30 Experimental Set-up + accuracy Theory Model IYPT Applicability
- 32. Conclusions Qualitative explanation of the appearance of the moiré pattern (geometry) Mathematical description based on geometrical
- 33. Thank you for your attention! Bibliography: A Moiré Pattern-Based Thread Counter (Gary Reich) Isaac Amidror_The_theory_of_the_moire_769_phenomen_Volume_I The
- 34. Experimental Setup Theory Model Optimization IYPT Transparent line Opaque line а b D а Limitations of
- 35. Experimental Setup Theory Model Optimization IYPT Дифракция рентгеновского излучения Now we are working with the value
- 36. Условия возникновения максимумов и минимумов Условия появления максимума: Условия появления минимума: d x/2 Разность хода: Experimental
- 37. Experimental Setup Theory Model Optimization IYPT Задаём обратную решётку Let's see how diffraction is described in
- 38. Слайд про точность,
- 39. Здесь надо рассказать про накладку и ткань, перескок с периода на период 45 градусов. Всегда две
- 40. Experimental Setup Theory Model Optimization IYPT Let's see how diffraction is described in the inverse lattice
- 41. Experimental Setup Theory Model Optimization IYPT Обратная решётка Let's see how diffraction is described in the
- 43. Experimental Setup Theory Model Optimization IYPT Зависимость от
- 44. Оксфорд и джинсовая ткань Experimental Setup Theory Model Optimization IYPT
- 45. Experimental Setup Theory Model Optimization IYPT Где физика, что по смещениям.
- 46. Experimental Setup Theory Model Optimization IYPT Let's see how diffraction is described in the inverse lattice
- 47. Experimental Setup Theory Model Optimization IYPT Производство счетчика Producing overlay thread counters Сделать счётчик с ограничением.
- 48. Experimental Setup Theory Model Optimization IYPT Что-то про маленький уголок
- 49. Experimental Setup Theory Model Optimization IYPT Moiré fringes can be thought of a beat phenomenon that
- 50. Experimental Setup Theory Model Optimization IYPT A quantitative measure of the distance D between successive light
- 51. Experimental Setup Theory Model Optimization IYPT угол
- 52. Conclusions IYPT максимум максимум минимум минимум минимум
- 53. Теперь. Будут спрашивать, что такое люкс. Люкс - это люмен на квадратный метр. Один люмен равен
- 54. Experimental Setup Theory Model Optimization IYPT Let’s model the situation. fabric is the two-dimensional grid with
- 55. Experimental Setup Theory Model Optimization IYPT Let’s model the situation. fabric is the two-dimensional grid with
- 56. Experimental Setup Theory Model Optimization IYPT Errors
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