half mirror

基本解释

The servant then took the inscribed half of the mirror back to Princess Lechang.
那个仆人把题了诗的铜镜带回来，交给了乐昌公主。
www.china.org.cn
The utility model relates to a photometric device, which comprises a cuboid half transparent and half reflecting mirror, a shading cylinder, a silicon photocell with a color filter and a viewfinder.
本实用新型涉及一种测光装置，包括立方形的半透半反镜、遮光筒、具有滤色片的硅光电池和取景器。
ip.com
In this paper, a half-silver mirror is used as the imaging component for combination of virtual and real images, and two methods to generate a real perceptual illusion are adopted.
本论文采用半银镜作为虚实像结合的成像元件，并用两种方法生成具有真实感知的虚像。

There were three other mirrors in the house: the mirror over the sink in the upstairs bathroom, the mirror over the sink in the downstairs half bath, and the small circular mirror with a wooden handle that hung on a hook beside the upstairs-bathroom window.
NEWYORKER: Miracle Polish
The peripheral utilizes three small drop down displays -- the rear is a full mirror with two half mirrors in front it, reflecting images from the phone display into what appears to be a three-dimension object -- and really, it a stunning little effect.
ENGADGET
Cool Earth's insight was that if you coat only one half of a balloon, leaving the other transparent, the inner surface of the coated half will act as a concave mirror.
ECONOMIST: Monitor