It is relative insensitivity to other than red and infrared lights.

它对红光，红外线的光以外的其它光相对来说是不敏感的。

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On each side of the screen is a small camera surrounded by tiny infrared lights.

萤幕两侧各有一台小型摄影机，摄影机旁边则围绕著小小的红外线灯。

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Now planned for commercial use, the eye tracker works by shining two invisible infrared lights at the user.

现在想想这个技术用于商业用途，基本原理是用两束不可见的红外光来照射用户。

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The hardware contains six infrared lights, designed to bounce invisible rays straight into your eyes.

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Hackers eventually got in on the game, using mail-order infrared transmitters to switch red lights to green.

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The image was discovered by the Wide-Field Infared Survey Explorer (WISE), which scans the night sky for lights in the infrared range to discover more about different aspects of astronomical objects.

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