SU1566210A1 - Optical rule - Google Patents

Abstract

The invention relates to a measurement technique and, in particular, to devices for monitoring surface deviations from straightness. The purpose of the invention is to improve the accuracy and productivity of measurement due to the precise alignment of the optical axis of the afocal system with the direction of movement of the measuring carriage, as well as reducing the time to calibrate the ruler. In case 1 of the optical ruler, additional base surfaces are made. At the same time, the base surfaces and guides 7, 8 for moving the measuring carriage 4 are arranged in pairs symmetrically with respect to the optical axis O ₁ O _{2 of the} afocal autocollimation system, and the target mark and the microscope grid 14 have alignment marks. 2 Il.

Description

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The invention relates to a measurement technique, namely, devices for monitoring surface deviations from straightness,

The purpose of the invention is to improve the accuracy and productivity of measurement due to the precise alignment of the optical axis of the afocal system with the direction of movement of the measuring carriage, as well as reducing the time to calibrate the ruler.

FIG. 1 shows a schematic diagram of an optical ruler; fig 2 - cross section; ne A-A in fig 1,

The optical ruler contains body 1, a rfocals autocollimation system, made in the form of two 0 0 Al arranged along the optical axis, a grain surface. The error of the original straight optical ruler is defined as the half-difference of the deviations from the straightness in each measured

kalno-lens lenses 2 and 3, from 20 to the point at the two positions of the housing 1,

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a measuring carriage 4 with a sight mark 5 and a measuring microscope 6, which has the possibility of translational movement, thanks to the upper 7 and lower 8 guides fixed on the housing. The housing 1 with its base (main) support surfaces 9 is mounted on opbras 10 and 1 1, one of which is usually adjustable. Case 1 has additional support surfaces 12, Support surfaces 12 and 9, and guides 7 and 8 of case 1 are arranged in pairs symmetrically with respect to optical osp 0 0 of lenses 2 and 3. Such their arrangement allows installation of case 1 with lenses 2 and 3 in two positions that are rotated by 180 around the optical axis of lenses 2 and 3 of the AF-caly autocollimation system, and moving in these positions of the body 1 of the measuring carriage 4 strictly along the optical axis.

Adjustment is performed using d5 quote marks 13, applied on the grid of the sight mark 5, perpendicular to the measuring mark of mark 5.

According to the quotation marks 13, the grids 14 of the microscope track the position of the images of the marks 13 when the frame 4 is moved along the axis of the afocal system, and the guides 7 and 8 dp alternate the carriages 4 symmetrically to the axis.

The optical ruler works as follows.

A self-checking optical ruler eliminates the use of special expensive devices, such as a working standard in the form of a steadfast stone bridge placed in a theostatically controlled room. At the same time, there is no need to transport the device to the place of certification, the associated increase in the probability of misaligning devices, which saves money and time for calibrating the rulers.

Claims (1)

Invention Formula Optical ruler containing a housing in which support surfaces are made, an afocal autocollimation system installed in the housing and made in the form of two coaxially arranged mirror-lens lenses, a measuring carriage on which a sight mark and an eyepiece with a grid are installed, and guides for moving the carriage located on the housing, characterized in that, in order to increase the accuracy and productivity of the measurement, additional support surfaces are made in the CQ ruler body symmetrically to the bases th reference surfaces relative to the axis afocal system ,, guides for moving the carriage pairs are symmetric with respect to axis afocal system, and the sighting mark and ocular grid printed label. 55 62104 The optical ruler is self-verifying, i.e., it is possible to determine the error of the original straight line. For this design of the housing 1 it can be installed in two positions that differ in rotation by 180 ° relative to the axis of the afocal systems. In one case, housing 1 JQ rulers are mounted on supports 10 and 11 by supporting surfaces 9, and in the other by supporting surfaces 12, In both positions of housing 1, an optical linear ruler is measured at the same points with an optical ruler. surface. The error of the original straight optical ruler is defined as the half-difference of the deviations from the straightness in each measured A self-checking optical ruler makes it possible to exclude the use of special expensive devices, for example, a working standard in the form of a steadfast stone bridge housed in a teostatically-placed room. At the same time, there is no need to transport the device to the place of certification, the associated increase in the probability of misaligning devices, which saves money and time for calibrating the rulers. Invention Formula An optical ruler, comprising a housing in which support surfaces are made, an afocal autocollimation system installed in the housing and made in the form of two coaxially arranged mirror-lens lenses, a measuring carriage on which the target mark and an ocular with a grid are mounted, and guides for movement carriages located on the body, characterized in that, in order to increase the accuracy and performance of the measurement, additional support surfaces are made in the body of the ruler symmetrically The reference surfaces for moving the carriage are pairwise symmetrical with respect to the axis of the afocal system, and marks on the eye mark and the ocular grid are marked on the reference surfaces relative to the axis of the afocal system. th