Optical radiation is just visible light energy spreading out.

光辐射就只是扩散的可见光能量。

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Letters and other characters on the screen are formed out of ink that has a high optical contrast with the background, making them easy to read.

在屏幕上的字体由墨水形成，与背景形成很高的光学对比度，使之便于阅读。

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Perkin-Elmer It turned out that Perkin-Elmer, which was probably the best optical manufacturer in America at that time, had built the primary mirror for this telescope.

结果事实是，当时美国最优秀的,光学部件制造商，为这个望远镜制造主镜。

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In terms of rear-facing ports, the new, even slimmer model is identical to the Slim, offering Ethernet, HDMI, Optical out, RCA and a spot for the AC adapter.

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At first I hooked up the cable box to the new TV via component video cables and the new DVD player via HDMI (with optical out to the sound system).

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Detailed in a message sent to testers this evening, there's also an update rolling out in the next 24 hours that upgrades video output to 1080p and exposes settings for the Echo like optical audio out, bitstreaming over HDMI or optical and diagnostics.

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