在光存儲,恆定線速度(CLV)是用於光盤驅動器的額定轉速限定符,並且還可以應用到可刻錄光盤的寫入速度。CLV意味着角速度(即RPM)在操作過程中發生變化,與CAV模式對比。恆定線速度的概念被留聲機先驅奇切斯特貝爾和查爾斯泰恩特於1886年申請了專利。

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