Zaidi Q, Pokorny J
Appl Opt. 1988 Mar 15;27(6):1064-8. doi: 10.1364/AO.27.001064.
In certain conditions, when tho human eye is irradiated by pulsed IR laser light, the observer sees the light as yellow or green. This could be due to second harmonic generation by the cornea, the lens, the retina, or two-photon absorption by the photopigments. It is shown that the most likely cause of this phenomenon is second harmonic generation at the cornea.
在某些情况下，当人眼受到脉冲红外激光照射时，观察者会将该光视为黄色或绿色。这可能是由于角膜、晶状体、视网膜产生二次谐波，或者是光色素的双光子吸收所致。研究表明，这种现象最可能的原因是角膜处产生二次谐波。
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