Young's elastic modulus tester with optical lever without reflector

Abstract

The invention relates to a Young's elastic modulus tester with an optical lever without a reflector. A steel wire is fixed in a mode of the existing instrument structure, and a plane mirror is not needed. A telescope is arranged on a tripod, wherein a front foot of the tripod is arranged on the upper end face of a movable clamping head of the steel wire, and the other two rear feet are arranged in a small end face groove of a workbench with a groove of the Young's elastic modulus tester. The optical axis of the telescope is parallel to a vertical line of the connection line of the front foot and the two rear feet of the tripod. A scaleplate component is put on the right front of the optical axis of the telescope, and during debugging, the optical axis of the telescope is horizontally aligned to the middle of the scaleplate by eye measurement. The focal lengths of an eyepiece and an objective lens of the telescope are fine debugged so as to ensure that a scale image is clear. Then high and low positions are also debugged, and other operations are carried out as a routine method. Because the target of the scaleplate is large, and the optical axis of the telescope is directly aligned to the scaleplate, an operator is easy to align to the target and debug the focal length. Because the plane mirror is not used, the loss of breaking the plane mirror is radically avoided.

Description

[0001] Field [0002] The invention relates to a stretching optical lever Young's elastic modulus measuring device. Background technique [0003] Measuring Young's modulus of elasticity of steel wire by stretching method is a classic basic physics experiment set up by many colleges and universities. Because the expansion and contraction of the steel wire in the elastic range is very small, it is difficult to accurately measure it with general length measuring instruments or general methods, so it is difficult to accurately measure its Young's elastic modulus. Now the flat mirror light lever method is commonly used to amplify the steel wire. Minor amount of stretch. In the process of measuring Young’s elastic modulus of steel wire with the plane reflector light lever method, the imaging system of the plane reflector light lever must be adjusted to observe the change of the scale reading. The scale image in the quasi-plane mirror requires that the scale and the optical axis of...

AI Technical Summary

Problems solved by technology

[0004] In order to overcome the difficulty of measuring Young's elastic modulus caused by the difficulty in adjusting the imaging system of the optical lever of the plane mirror and the problem that the plane mirror is easy to break, the present invention designs a Young's modulus of elasticity measuring instrument without mirror optical lever, which can Aim directly at the scale with the telescope, and then adjust the focal length of the image

Because the scale target is large and very intuitive, it is easy for the tester to solve the problem of aligning the target and adjusting the focus

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