| 简介 |
Proposed technical solution (invention) relates to optical devices or contrivances with the use of movable optical elements for controlling intensity, color, phase, polarization or direction of light, in particular to scanning systems and may be used in optical coherence tomography for scanning measuring volume of by depth. Aimed utility model is to diffusion lu spatial resolution scanning depth, due to organization of more effective focusing of radiation in point optical fiber, leading to improves restoration of collimated radiation and, respectively, reducing loss of useful signal. Or solve this task, that in the device the scanning reference arms optical coherent tomograph, so same, as and device, which is the nearest analog, there are single-mode light guide, being single input and output for radiation, optically coupled to it lens-collimator, diffraction grating with an adjustable inclination, scanning mirror with an adjustable inclination mirror and double passage. New designed device scanning reference arms optical coherent tomograph is, lens-collimator rigidly joined with mirror double passage, so that keeping its mutual square with end optically connected with the lens-collimator of single-mode light guide, at used focusing dichroic lens, the scanning mirror is placed on the focal distance from it. So, use of focusing dichroic lens, in combination with rigid connection of the lens-collimator and mirror double passage, and also special relative arrangement of focusing dichroic lens and scanning mirror allows effectively focus and to return widely strip radiation along the same optical track, over which it initially came. In specific realization error not exceed 1 micron. Because single-mode light guide rare-earth -980 a-fc -1 has core diameter -5.8 micron, error of not more than 1 micron is acceptable and allows to make the effective focusing end face of optical fiber (and further recovery of collimated radiation), and consequently reduce the losses of useful signal and thereby improve spatial permission scanning depth. |
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