本研究應用管胞效應與自行架設之光學模組，開發一套光學非接觸式木材纖維量測系統，此系統藉由光學掃描方法掃描試片弦切面與徑切面以預測木材彈性模數(Modulus of Elasticity, MOE)，本研究同時探討試片橫切面晚材率對於預測木材MOE之影響。
本研究以木材纖維量測系統預測柳杉無節材與含節點試片之MOE，並以抗彎實驗量測試片之實驗MOE，由此驗證木材纖維量測系統預測MOE之正確性，結果顯示木材纖維量測系統預測MOE與抗彎實驗MOE有相同之趨勢，得以驗證本系統之正確性，突破以往使用接觸式方法量測木材MOE之限制，達到非接觸式方法預測木材MOE之目標。

In this thesis, an optical system was developed based on the tracheid effect and the self-constructed optical setup to measure the fiber orientation of timber. By using the developed optical system to scan both tangential and radial surfaces, both local and global modulus of elasticity (MOE) of timber can be predicted. Moreover, the measurement of proportion of latewood of the cross-section was used to investigate its effect of predicting MOE.
In this thesis, the specimens adopted were the clear wood and the wood with knot of Cryptomeria japonica to predict the MOE by the optical system. To verify the predicted MOE result, a bending test was also conducted to measure the MOE of specimens. The results show that local MOE profiles along longitudinal direction obtained from optical scanner and bending test have the same tread. In the past, almost all MOEs were determined by the contact method. By using the non-contact method of the optical system, the MOEs can be predicted successfully.

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