Newton ring interference fringe counting device and counting method
A technology of interference fringes and counting devices, which is applied in the field of physical optics, can solve problems such as inconvenience, experiment inconvenience, and random numbers, and achieve the effects of avoiding inconvenience, facilitating processing and recording, and improving efficiency
Active Publication Date: 2015-06-10
DATONG POWER SUPPLY BRANCH SHANXI ELECTRIC POWERCO +1
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Problems solved by technology
In the experiment, using a reading microscope to observe the interference fringes requires recording dozens of fringe distances, which is very inconvenient to count, and it is prone to counting mistakes and random numbers, which brings inconvenience to the experiment.
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[0011] In the figure, bracket 1, sodium light lamp 2, Newton ring instrument 3, semi-reflective half lens 4, opening and closing window 5, transmission drum 6, main display 7, transmission rod 8, chassis 9, fixed grid 10, moving grid 11, Photoelectric sensor 12, power supply 13, LCD screen control circuit 14, photoelectric adjustment circuit 15, capacitive sensor integrated circuit 16, CPU control circuit 17, reset count button 18, reset distance button 19, switch button 20, display screen 21 , power socket 22, power indicator light 23, inner wall 28, interface 30, cable 31, wire 32.
[0012] For university physics experiments using Newton rings to measure the curvature radius of plano-convex lenses, the experiment requires human eyes to observe dozens of orders of light and dark fringes, and use a reading microscope to read the distance between the required order fringes and the center of Newton rings. The experimental process is complicated. It is prone to counting mistakes ...
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The invention relates to a Newton ring interference fringe counting device and a counting method of the Newton ring interference fringe counting device. The Newton ring interference fringe counting device and the counting method of the Newton ring interference fringe counting device are characterized in that a photoelectric sensor is aligned to an opening and closing window, collects bright interference fringe information and dark interference fringe information, detects the intensity variation of light received by the photoelectric sensor, converts the light intensity variation into electric signals and inputs the electric signals to a photoelectric adjusting circuit for data processing; a capacitive grating sensor converts a mechanical displacement value into phase variation of an electrical signal and then sends the phase variation to a capacitance grid sensing adjusting circuit for data processing, a central processing unit (CPU) controls the operation of an internal register and a video memory of a liquid crystal display screen, fringe distance information is enabled to be transmitted to a capacitance grid sensing integrated circuit through an interface and an electric cable, and the number of fringes and the distance information are displayed through a display screen so that the number of the fringes and distances are displayed on the liquid crystal display screen.
Description
technical field [0001] The invention relates to a Newton ring interference fringe counting device and a counting method, belonging to the field of physical optics. Background technique [0002] Newton's rings are an interference pattern of light, consisting of concentric rings of light and dark. In a university physics experiment, a convex lens with a large radius of curvature is used to contact flat glass. When illuminated under parallel monochromatic light, a microscope can be seen with the contact point as the center of the circle, surrounded by some light and dark concentric rings. [0003] The circles in Newton's rings are at unequal distances, tapering off with distance from the center point. In the experiment, using a reading microscope to observe the interference fringes requires recording dozens of fringe distances, which is very inconvenient to count, and it is prone to counting errors and random numbers, which brings inconvenience to the experiment. Contents of...
Claims
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IPC IPC(8): G09B23/22G01B11/02
Inventor 李伟高明张培武王启银李广
Owner DATONG POWER SUPPLY BRANCH SHANXI ELECTRIC POWERCO