CRYSTAL OPTICAL SYSTEM PROVIDED TRAINING INTERFERENCE DEVICE Russian patent published in 2005 - IPC

FIELD: optical systems.

SUBSTANCE: training interference device provided with crystal optical system has clarifier, crystal-optic bema-splitting system and observation screen. Beam-splitting system has two Iceland spar crystals. Main cross-section planes of the crystals coincide to meet the condition that spatial shift of non-ordinary e-beam in the first crystal is compensated by opposite shift of e-beam in the second crystal. The result of such a coincidence is the light-gathering fringe pattern in form of set of prolonged and bright ellipse-shaped interference bands elongated along line of section of observation screen by main cross-sectional plane of crystals. Path of bands illustrates the basic dependence of Iceland spar crystal refractivity on direction of propagation of e-beam inside crystal. Crystal system is put into motion being lateral to light beam is performed by acting on adjusting screw of the device and changes in deformation of fringe pattern can be revealed. Device allows observing and juxtaposing results of overlapping of two light beams in the same field of view which beams change strongly for mutual coherence degree.

EFFECT: simplified production process; simplified adjustment procedure.

6 dwg