SU753798A1 - Method of making optical rod-like elements - Google Patents

Description

(54) METHOD OF MANUFACTURING OPTICAL STEMNAMS

one

The invention relates to the field of instrumentation, namely, to methods for manufacturing optical rod-like elements. The method will be used in the medical industry in the manufacture of optical rod-like elements for endoscopic devices.

The known method consists in pulling blanks of rod-like elements from molten glass, cutting blanks, grinding their cylindrical surface, grinding and polishing the ends 1.

The disadvantages of this method are: the limited application of the method, which is due to the fact that due to the high temperature differences in the process of drawing and annealing glass, not all brands of optical glass are t; low quality due to deviations from flatness along the edge.

The closest technical solution is a method of making otic stem-like elements, including drilling cores from glass blanks, deciphering and polishing their cylindrical surfaces and ends 2).

ELEMENTS

The disadvantages of this method are the complexity of the method, which arises due to the assembly of the fovash1 operations, which are extruded into the frame, and the polishing of the ends and disassembly of the package, as well as the low quality due to deviations from the flatness.

The purpose of the invention is ooBbiujeHHe quality.

The goal is achieved by the fact that in the method of manufacturing optical rod-shaped

10 elements, including drilling core glass rods, grinding and polishing their cylindrical surfaces and ends, grinding and polishing the top to bottom rods before drilling the core rods.

Claims (2)

15 planes of glass preform to a thickness equal to the length of the element to be made, and glue these planes with protective kKa, which are removed after grinding and polishing the cylindrical surfaces of the rod. In addition, the bottom plane of the glass preform is glued over with a protective substrate consisting of two layers, the outer layer being removed after drilling the cores. 375 The essence of the sentence is illustrated in FIG. 1 2, where in FIG. 1 is a diagram of drilling out a rod-like element, and FIG. 2 rod-like element after drilling out of egotoka, plastered with substrates. The glass blank 1 along planes 2 and 3 is glued over with protective substrates 4, 5, b. The solidification is carried out using an annular diamond drill 7. The product obtained after drilling is a rod-like element gg 8 with the remaining parts 9, 10, 11 of the substrate 4, 5 and 6. The method and preparation of optical rod-like elements is carried out as follows. First, an optical glass preform 1 is processed, i.e., its upper and lower planes 2 and 3 are polished and polished, which can be parallel with each other depending on the requirements. The blank 1 is polished until its thickness 1a becomes equal to the predetermined length of the rod-like element being manufactured. Then, it is coated with substrates 4, 5, 6 of appropriate sizes, made of polished sheet glass or photogallery, arranged as follows: one substrate 4 is applied to the top 1 flush surface 2 of the workpiece 1 P1i1; 1 and two are on the juicy plane 3. 5 and 6. Substrates 4 and 5 protect the polished 2n 3 planes of the workpiece 1 from mechanical damage (splittings) during drilling. Substrate 6 is necessary to eliminate the tide remaining at the end of the rod-like element after leveling. The preform 1, substrates 4, 5, b, produces a drill-out of a column including a rod-like element 8 with the remaining parts 9, 10, 11 of the substrates 4, 5, 6. Substrate 9, representing the tide with the tide, is removed after you drilling, since the tide does not allow for the following operation — grinding the tsishndric surface of the rod-like element. Substrates 10 and 11 remain on the rod-shaped element B to protect its polished ends from mechanical damage (chips, scratches) when grinding the cylindrical surface. In order to remove the substrate 9 and leave the substrates 10 and 11, the glue connecting the substrates 9 and 10 between them is chosen less refractory than the glue connecting the substrates 10 and 11 to the ster) 1 s-shaped element 8. The drilling of the rod-like elements is performed on BbicoKOTOfflOM drilling machine with coolant lubricant (Sozh). Sozh is fed into the internal cavity of the instrument under a pressure of 2-5 atm. The tool for drilling core-shaped elements is a diamond hollow drill bit 7. After drilling, the core-shaped element is polished to the required diameter and class of surface roughness on a centerless grinding machine. The protective substrates 10 and 11 are then removed. The invention is illustrated by a specific example of the coexistence of the method of manufacturing rod-like elements for medical eido-scopes of diameters 1.6; 2.0, 2.3, 3.0 mm long:,. 20 - 40 mm of optical glass (grade K8, STKZ, TF5). The ends of them are processed with an accuracy of 5, D N 0.05 of the interference ring with a roughness - class 14 (GOST 2789-73), surface finish - class 4 (GOST 11141-65) and roughness of the Sch1lindrical surface - class 7 (GOST 2789-73 ). The production time of one rod-like element is 3-5 minutes, depending on its dimensions and processing modes. These samples are made as follows. First, the opposite planes of glass blanks with a diameter of 85 mm and thicknesses of 25 and 45 mm are polished and polished to thicknesses of 20 and 40 mm with an accuracy of D, 5, the interferential ring with a roughness of class 14 (GOST 2789-73) and purity of class 4 (GOST 11141- 65). Then, on the one hand, the protective substrate is glued to the polished surfaces of the workpiece with shellac glue, the softening temperature of which is 80-90 ° C, on the other - two substrates, the first substrate being glued to the workpiece with shellac, the second to the first substrate with adhesive adhesive CH 2 or CH 6, the temperature of softening of which is 70-75 ° C. All three substrates are made of photoglass 85 mm, thickness 2.mm. After pasting the workpiece, bar-shaped columns are drilled with an allowance of 0.050, 35 mm diameter for centerless grinding of the cylindrical surface. Claims 1. A method of manufacturing optical rod-like elements, including drilling cores from glass blanks, grinding and polishing their cylindrical surfaces and ends, characterized in that, in order to improve quality, grinding and polishing is carried out before the cores are drilled. These are the upper and lower planes of the glass preform to a thickness equal to the length of the element to be made, and glue these planes with protective substrates, which are removed after splicing, polishing and polishing of the shsinder surfaces of the rods. 2. A method according to claim 1, characterized in that the lower plane of the glass preform is glued over with a protective substrate consisting of two layers, the outer joint being removed after drilling the rods. Sources of information taken into account 1ph expertise 1.Knutov, S.V., et al. On the techiologist of the manufacture of rod-shaped elements of oggtik szdoskog. Medicine News, 1976, vol. 2, s. 83 2. Semibratov M.N. Technology for processing optical parts, M., Mashinostroenie, 1975, p. 191. d