白光 LED 的光學模擬 2011/3/4 於清華大學工科館 NE69 林世穆光學博士 台北科技大學光電系 1
Basic Radiometric parameters Radiant Power 輻射通量 (Flux) The total power emitted by the source. Watts Radiant Intensity 輻射強度 Irradiance 輻射照度 The flux per unit solid angle. The flux per unit area incident upon a surface. Watts /sr Watts /m 2 Radiance 輻射亮度 (Brightness) the flux per solid angle per unit area. Watts /m 2 -sr 2
Luminous Flux (ΦV) The time rate of the flow of radiant energy, evaluated in terms of standardized human visual response (V λ): Where ΦV is in lumens, Φ is in watts per nm (nanometer), λ is in nanometers, V λ is the photopic response function, and K is the maximum spectral luminous efficiency in lumens per watt. K has a value 683 and is derived from the SI definition of luminous intensity. 3
Illuminance (EV) The aerial density of the luminous flux incident at a point on a surface: EV = d Φ/ da If there are 100 lumens incident on a surface (uniformly) of 1 m 2, then the illuminance is 100 Lux. 4
Luminous Intensity (IV) The luminous flux per unit solid angle in a given direction (of a point source): IV = d Φ /d ω 5
Luminance (LV) Luminous flux emitted from an area (da), into a direction θ, within a solid angle dω 6
Luminance vs. Brightness In practice, luminance is often misunderstood as brightness; however, it is important to understand that luminance is an objective measure, whereas brightness is subjective and depends on the subject and the environment. 7
Luminance (LV) The intensity (I) is the product of the luminance (LV) and projected area of the source (da cosθ). Introducing optics cannot increase the luminance of a given system. If there is no light loss is known as luminance conservation. 8
Basic Photometric parameters Flux (luminous power) 光通量 (Luminous) Intensity 發光強度 Illuminance 光照度 Brightness 亮度 (luminance) The total power emitted by the source. The flux per unit solid angle. The flux per unit area incident upon a surface. the flux per solid angle per unit area. Lumen (lm) 流明 =Watts Candela (cd) 燭光 =lumen/steradian Lux 勒 =lumen/m 2 Nit 尼特 = W/m 2 -sr =candela/m 2 9
LED 的基本參數 總光通量 光形 ( 角分布曲線 ) 光譜 ( 發光波長之權重 ) 色溫 演色性 10
Profile Setting Step1: 由規格書中取得光強分布曲線 Step2: 在極座標上定義三個參考點 11
Profile Setting Step3: 依序點出光強曲線位置 12
Spectrum Setting Step4: 由規格書中取得光譜分布曲線 Step5: 在光譜圖上定義兩個參考點 13
Spectrum Setting Step6: 依序點出光譜曲線之位置 14
Spectrum Setting Step7: 設定預取樣之點數 Step8: 開始進行取樣動作 15
Export to TracePro Step7: 建立種類與檔案名稱 Step8: 設定欲取樣之點數 Step9: 設定光源之光通量或輻照度 16
Surface Source in TracePro 17
Surface Source in TracePro 18
Surface Source Setting 19
Everlight Shuen Series LED 20
Product Specification 21
Everlight 億光之白光 LED 炫系列 Shuen [Xuan] is the English translation for the Chinese word meaning Bright and Shiny. Both words are relevant descriptions of this Everlight LED series. The modern, adaptive Chinese definition of the word represents that which is New, Extravagant, and Highly Sought After. 22
白光 LED 炫系列之 Binning 23
Spectrum of Cool-White LED 24
Spectrum of Neutral-White LED 25
Spectrum of Cool-White LED 26
Everlight Shuen Series LED 27
True Color and Spectrum of Cool- White LED under TracePro 28
CIE-xy and CCT of Cool-White LED under TracePro 29
CIE-uv and CCT of Cool-White LED under TracePro 30
True Color and Spectrum of Neutral- White LED under TracePro 31
CIE-xy and CCT of Neutral-White LED under TracePro 32
CIE-uv and CCT of Neutral-White LED under TracePro 33
True Color and Spectrum of Warm- White LED under TracePro 34
CIE-xy and CCT of Warm-White LED under TracePro 35
CIE-uv and CCT of Warm-White LED under TracePro 36
冷白中白暖白 37
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calculating Color-Rendering Indices Flow chart for calculating Color-Rendering Indices Test Method Corrected Results Daylight Series Calculator 39
Flow chart for calculating color-rendering indices Test Light source CCT Ref. Light source Chromatic Adaptation Test samples Ti, t U*V*W* Ti, r U*V*W* Delta Ei Ri Ra 40
CRI Calculation Method 1. 計算待測光源頻譜的色座標 CIE 1931 xy 41
CRI Calculation Method 1. 計算待測光源頻譜的色座標 CIE 1931 xy X Y Z k 106.19100.00134.90 17.89 x y 0.31 0.29 42
CRI Calculation Method 2. 計算 CIE 1960 uv u v 0.2112 0.2984 3. Chromatic adaptation c d 201134 2.6981 2.0135 清華大學能源與環境研究中心 43
CRI Calculation Method 4. 求出待測光源之 CCT, 尋找合適的標準光源 5. 利用 1~4 點, 可以求出標準光源與待測光源之 u,v,c,d, 分別定義在下方 標準光源 : 201134 待測光源 : 清華大學能源與環境研究中心 44
6. 標準光源與待測光源之 u,v,c,d u r v r c r d r 7000K 0.1955 0.3087 2.3228 2.0789 u t v t c t d t Sbm6 0.2112 0.2984 2.6978 2.0137 7. 標準色樣板 No.1~8 45
Test Method 8. 以待測光源照射色樣板 No.1~8 之結果 46
9. 計算 No.1~8 反射光譜之 u i, v i, c i, d i Test Samples X ti Y ti Z ti k u ti v ri c ti d ti 59.1403 No.1 116.8115 100 101.7712 0.2431 0.3122 2.0354 1.8489 No.2 118.6478 100 57.94715 0.2648 0.3347 1.1589 1.7435 60.07 55.7502 No.3 81.32637 100 33.25819 0.1935 0.3569 0.6652 2.0370 61.5449 No.4 77.99719 100 73.93315 0.1733 0.3334 1.4787 2.1498 59.7800 No.5 96.2954 100 159.1183 0.1858 0.2893 3.1824 2.1535 64.0521 No.6 118.6498 100 261.2962 0.1975 0.2497 5.2259 2.1542 62.9431 No.7 133.2471 100 249.6496 0.2237 0.2519 4.9930 1.9964 58.9715 No.8 133.6298 100 199.1283 0.2396 0.2689 3.9826 1.8908 47
10. 計算 No.1~8 反射光譜 之 u i, v i Test Samples u i ' v i ' No.1 0.2293 0.3208 No.2 0.2077 0.3448 No.3 0.1763 0.3617 No.4 0.1550 0.3411 u r v r c r d r 7000K 0.1955 0.3087 2.3228 2.0789 No.5 0.1681 0.3008 No.6 0.1810 0.2634 u t v t c t d t No.7 0.2096 0.2651 Sbm6 0.2112 0.2984 2.6978 2.0137 No.8 0.2265 0.2810 48
Test Method 11. 計算 No.1~8 反射光譜之 1964 U*V*W* 座標系 標準光源 Ti, r: 待測光源 Ti, t: 49
Sbm6 D7000 Test Samples U t,i * V t,i * W t,i * U r,i * V r,i * W r,i * No.1 26.75213 9.614529 60.9023 31.31 8.83 60.37 No.2 9.5568 28.4128 60.4983 14.87 24.99 59.61 No.3-15.5518 42.9907 62.4504-8.10 38.14 61.01 No.4-31.5125 25.2000 59.8742-32.94 19.67 60.32 No.5-21.5556-6.2470 60.6235-26.17-6.68 61.52 No.6-11.0795-34.6710 58.8578-18.09-29.72 60.63 No.7 10.8638-33.6245 59.3008 9.78-27.60 60.15 No.8 201134 24.5559-21.9586 清華大學能源與環境研究中心 60.9766 27.98-16.92 5061.73
Test Method 12. 計算 Euclidean distance E i 13. 計算 special color-rendering index 14. 計算 general color-rendering index 51
Test Samples E i R i R a No.1 4.64574 78.6296 70.4067 No.2 6.35446 70.7695 No.3 8.97307 58.7239 No.4 5.69141 73.8195 No.5 4.71074 78.3306 No.6 8.75616 59.7216 No.7 6.18562 71.5462 No.8 6.14935 71.713 52
Daylight Series Calculator 53
Daylight Series Calculator 54
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