The size of your light source, relative to your subject, affects the overall look of the picture.
光源与被摄体的相对大小，决定了照片的整体效果。
The effects of shape, size and orientation of polarized light source on light transmission ratio of an air-spaced analyzer are studied.
探讨了单色线偏振光源的形状、尺寸和取向对检偏棱镜光强透射比的影响。
Therefore, a suitable size of extended light source can be chosen, considering the requirement of SNR in the optical design.
因此， 需要在设计中结合系统信噪比的要求， 选取合适尺寸的扩展光源。
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