The formulae given the corresponding permitted image distance can be calculated.

利用所给公式算出了相应的允许象距。

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Object - image distance formula of single spherical surface is derived through Times Compensation.

用时间补偿法推导了单一球面的物像距公式。

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Measuring the focal lengths of thin lens by means of object distance and image distance is a commonly utilized method in geometric optics.

利用物距、像距法测量薄透镜的焦度是几何光学中最常用的方法。

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The brain gets disoriented trying to reconcile the difference between the distance to the image and the foreshortened viewing angle.

FORBES: Adventures in the Third Dimension

Spectators at that opening ceremony held up a colored piece of plastic under their noses to create an image that, from a distance, looked like a map of the world.

WSJ: Social Media

For those looking to capture a beautiful and sharp image up close or at a distance, the new COOLPIX P520 boasts a 42x optical zoom-NIKKOR glass lens with an impressive zoom range from a wide 24mm to a whopping 1000mm (35mm equivalent), for users that require the very best in performance and versatility.

ENGADGET: Nikon updates Coolpix compact lineup with S9500, sub-$200 S5200 and L28