Image acquisition and in-situ projection optical device

Abstract

The invention discloses an image acquisition and in-situ projection optical device which comprises a wavelength division multiplexing module, an optical fiber collimator, a focusing lens, an MEMS (micro-electro-mechanical system) scanning mirror, a photoelectric detection module and an imaging and projection control module. The wavelength division multiplexing module is used for multiplexing two light beams with different wavelengths into an optical fiber; the optical fiber collimator is used for collimating light beams outputted from the optical fiber; the focusing lens is used for focusing the collimated light beams; the MEMS scanning mirror is used for reflecting the focused light beams to the surface of an imaging object; the photoelectric detection module is used for receiving near-infrared light reflected by the surface of the imaging object and converting the near-infrared light into electric signals; the wavelength division multiplexing module outputs the two light beams with the different wavelengths under the control of the imaging and projection control module according to the electric signals, and the imaging and projection control module is further used controlling the deflection speed of the MEMS scanning mirror. The image acquisition and in-situ projection optical device has the advantages that light outputted by an imaging light source and light outputted by a projection light source are coupled into the same optical fiber, then are collimated and are outputted, so that light paths of the light outputted by the imaging light source and the light outputted by the projection light source can be assuredly coincided with each other, and drift-free projection images can be acquired from the surface of the object; the image acquisition and in-situ projection optical device is stable in performance, small in size and low in cost.

Description

technical field [0001] The invention belongs to the technical field of image detection, and more particularly relates to an optical device for image acquisition and in-situ projection. Background technique [0002] The visible light band is 390-780nm. When each part of the surface of an object can form a differentiated reflectance for this band of light, it can produce color or grayscale and form an image visible to the human eye. However, there are also many objects whose reflectivity to visible light is not significantly different from each part of the surface, so under the irradiation of visible light, the surface image visible to the human eye cannot be presented. If it is irradiated with light other than the visible light band, differential reflectivity may be produced. However, the presented image cannot be directly observed by the human eye, and can only be detected by various photodetectors. [0003] For example, some people with darker skin color or thicker fat lay...

AI Technical Summary

Problems solved by technology

[0007] Aiming at the above defects or improvement needs of the prior art, the present invention provides an optical device for image acquisition and in-situ projection. The technical problem of complex optical path structure and large error in the prior art

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