SU693112A1 - Method of centring lenses being glued - Google Patents

Description

I

The invention relates to an instrumentation technique and can be used, in particular, when centering the glued lenses, as well as when assembling and adjusting optical-mechanical devices.

The closest to the technical essence of the invention is the method of centering the glued lenses, which consists in focusing the autocollimation mark on the centers of curvature of the lens surfaces and combining the autocollimation images of these centers of curvature with mark 1).

The known method does not have high enough-precision centering due to the inability to verify the quality of the bonding of lenses.

To increase the accuracy of centering, the autocollimation label is focused on the centers of curvature of the glued surfaces of the lenses and after combining the autocollimation images of the centers of curvature of these surfaces with the label by mutual displacement and tilting of the lenses, the center of the interference rings formed during reflection from the external surfaces of the lenses is aligned with the label.

The drawing is a schematic diagram of the proposed device.

The device contains successively located laser 1, lens 2, optic element 3 with a label 4 in the form of an aperture, micro-lens 5, an annular frame 6 and an observation system 7..

The method is carried out as follows.

The bonding lenses 8 and 9 (negative 8 and positive 9) with an adhesive layer 10 applied between them are mounted on an annular frame 6, which is aligned centered about the optical axis O-O of the device. Mark 4 in the form of a hole has a value that roughly corresponds to the size of the diffraction point. This point by micro-lens 5 is depicted in the plane of the centers of curvature of the glued surfaces of lenses 8 and 9. Micro-lens 5 has a working distance that allows the label to be focused into the cavity of the centers of curvature of the glued surfaces, perpendicular to the optical axis O-O. System 7 serves to observe the autocollimation glare by projecting. The microscope lens 5 is in the luster of the optical element 3 and the mark 4. The observing system 7 is focused on the mark. The light monochromatic coherent beam from laser 1 by lens 2 is focused on the mark 4 of the optical element 3, the Multi-lens 5 depicts this mark in the plane of the centers of curvature of the glued surfaces of the lenses 8 n 9. The rays reflected from the glued surfaces,

With the help of the micro-lens 5, the autocollimating labels from the ckneHBaeMbtx surfaces are projected onto the surfaces of the optical element 3. The interference colades are also designed by micro-object 5 into the plane of the optical element 3.:

The operator, using the observational system 7 focused on the mark 4, simultaneously sees the mark 4, the images of AWBc labels from the glued surfaces of lenses 8 and 9 and the image of interference rings of equal inclination from the outer surfaces of lenses 8 and 9. The displacement of the lens relative to each other aligns the image of the auto-collimation marks from the glued surfaces of the Lens 8 and 9 and the center of the system of interference rings with the mark 4. In this case, all four centers of curvature are shown on one straight line wm. :; -,,, when monitoring the already glued lens optics, measuring the distance between the center of the interference rings and the tags combined with the label with autocolyma marks allows determining the decentration of the glued lens, and measuring the distance between the autocollimation j / - o; ::::; :. :: - ..; - ::

Marked by glued surfaces, it is possible to evaluate the wedge-shaped layer of glue.

By using this method, it is possible to control the uniformity .;

gluing the layer between the lenses, controlling and ensuring the coincidence of all the centers of curvature. A great advantage is the possibility of centering and controlling the centering of the lens without rotation. The described method will allow

improve accuracy and increase producer-. labor in operations related to the centering of the lenses, as well as to simplify the design of test equipment.

FORUMUA AND 3 ABOUT AND

A method for centering glued lenses, in which the autocollimation label is focused on the centers of curvature of the lens surfaces and combines the autocollimation images of these centers of curvature with the label, characterized in that, in order to improve the accuracy of the centering, the autocollimation label is focused on the centers of curvature of the adhesive surfaces of the lenses and after combining the autocollimation images of the centers of curvature of these surfaces with the label by mutual displacement and tilting the lenses combine with the label the center of the interference x rings formed by reflection from the lens surface.

Sources of information taken into account in the examination 1. GU kyle M. Ya. Autocollimation, M., Mashchgiz, 1963, p. 80-82 (prototype).