VISUALISER OF DENSITY IRREGULARITIES OF MEDIUM Russian patent published in 2009 - IPC G01N21/45 

FIELD: physics; optics.

SUBSTANCE: present invention pertains to optical instrument making, and specifically to optoelectronic devices, based on Foucault-Schlieren method and used for analysing the refractive index gradient of optically transparent media (liquids, gases). The visualiser contains radiation system 1, consisting of a semiconductor laser and a capacitor, autocollimator, comprising diaphragm 2, front objective 3 and reflector 4, protective illuminators 5 and 6, two beam splitter prisms 7 and 8, photodetector 9, transmission telecamera 10, information processing unit 11 and device 12 for recording images. Reflector 4 is in form of a rectangular (or square) matrix, consisting of a tipple-prism with size comparable to or less than the value of geometric resolution of the visualiser. Between the protective illuminators there is view room 13. Between the beam splitter prisms in the focal plane of head objective 3, there is shadow blade 14. Behind diaphragm 2 in the focal plane of front objective 3 there is mirror 15. Between the first beam splitter prism 7 and photodetector 9 and the first beam splitter prism 7 and transmission telecamera 10, there are projection lenses 16 and 17. The output of photodetector 9 is connected to the input of the information processing unit 11, and the output of the transmission telecamera 10, in form of a CCD matrix is connected to the input of the device for recording images 12.

EFFECT: increased accuracy of measuring the gradient of optical irregularities of a medium due to reduction of vibration errors of measurement.

3 cl, 2 dwg