叙述一种用于测试大口径、长焦距光学系统杂光系数、渐晕系数、像面照度均匀性等光学参数的检测方法。
A method is introduced for testing stray light coefficient, vignetting coefficient and image surface uniformity optical system with large aperture and long focal length.
在照度相同、光质不同的条件下，比较各种光质对缕丝花试管苗生长发育的影响。
Under light of different quality with a similar irradiance, test tube seedlings of Gypsophila elegans were compared.
光度计是专门用于测量发射，反射或透射光的光通量，亮度，照度或发光强度等。
Photometers are specifically designed to measure emitted, reflected or transmitted light in photometric terms of luminous flux, luminance, illuminance or luminous intensity.
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