| 1 | His figure looks very funny in the concave mirror. | |
| 2 | Collectively, the faces of all the tiny airborne ice crystals act as a giant concave mirror. | |
| 3 | The convex lens and planoconcave mirror thermal lens compensation methods are proposed and applied to a high power pumped Tm:YAP laser. | |
| 4 | Observation eyepiece consists of concave mirror and a separate gate is formed, in the eyepiece can be seen at the same time the two semicircle color, its left for the sample color. | |
| 5 | First, the team placed two concave mirrors 1 micrometre apart, and filled the lens-shaped cavity between them with a red liquid dye. |
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