双眼的透镜能够各自调节清晰度。
Lenses for each that can be individually adjusted for sharpness.
讨论了由单一二次反射镜和放在其后的两透镜无光焦度校正板组成的光学系统的像差特性。
The aberration characteristics of the optical system of a single conic reflector and a two-lens null corrector are discussed.
重点讨论了眼镜片(透镜)中心透射比标准测量装置测量不确定度的来源，详细分析各不确定度分量的评定。
We discuss the sources of the measurement uncertainties of standard equipment for spectacle lens (lens) center transmittance and analyze each components of uncertainty.
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