Patent ID: 8629980
Filing Date: 2014-01-14
Classification: G01J,G01N,G02B

Abstract:
1. An optical microscope comprising: a first light source configured to irradiate a sample with a first train of optical pulses having a first optical frequency; a second light source configured to irradiate the sample with a second train of optical pulses having a second optical frequency, which is temporally synchronized with the first train of optical pulses; a light receiving element configured to convert light scattered from the sample into an electrical signal, the light scattered from the sample being caused by the first and second light sources irradiating the sample with the first and second trains of optical pulses; and a lock-in amplifier configured to synchronously demodulate the electrical signal of the light receiving element using a first repetition frequency of the first train of optical pulses as lock-in frequency, wherein the first repetition frequency of the first train of optical pulses is an integral sub-multiple of a second repetition frequency of the second train of optical pulses.