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Beam collimation method and displacement method of measuring the lens focal length or point source of using it with Marti pull beam shearing interference
Beam collimation method and displacement method of measuring the lens focal length or point source of using it with Marti pull beam shearing interference
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机译:束准直法和位移法测量具有Marti拉力束剪切干涉的透镜焦距或使用它的点源
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摘要
PROBLEM TO BE SOLVED: To improve the accuracy of measurement by disposing a sheet of plate glass whose one end is of a wedge shape and the other a parallel form behind a collimeter lens, and moving for adjustment the lens so that an interference stripe on a screen is turned in a lateral direction. ;SOLUTION: An optical system is composed of a laser beam source 1, microscope objective lens 2, collimeter lens 3, plate glass 4 whose one end is in a wedge form and the other in a parallel form, focusing lens 5, and screen 6. The plate glass 4 is coated with a metal reflection film on each of the opposed sides of the plate glass 4. The plate glass 4 is disposed behind the collimeter lens 3, and light made parallel is made incident to the glass plate 4. When the glass plate 4 is set slantly slightly to give a shear, a sharp interference stripe is focused on the screen 6 by a multiple beam, and when the beam is mad parallel completely the interference stripe generates laterally. Accordingly, through the adjustment of moving the lens 3 along an optical axis to turn the interference stripe in the lateral direction, the collimation of beam can be carried out.;COPYRIGHT: (C)1999,JPO
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