The amount of sky that you can view through a telescope is called the real (true) field of view and is measured in degrees of arc (angular field).

通过望远镜你所能看到的天空的范围称作真实视场，以弧度值(角视场)来度量。

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Detection of the decoys in the field of view (FOV) of the imaging-infrared seeker (IIR) is important for IIR to track the true target aircraft.

在红外成像导引头视场中，及时检测出干扰弹是红外成像导引头实现抗干扰弹干扰的前提。

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Colors are very accurate, and focus remains true across the field of view.

FORBES: Zeiss: A Tool Bereft of Weakness