SU592343A3 - Method of manufacturing articles of beam-guiding lens type - Google Patents

Description

(54) METHOD OF MANUFACTURING PRODUCTS OF THE TYPE OF CORRECTIVE LENSES

The invention relates to the manufacture of products from polymeric materials such as corrective lenses, used and the manufacture of a screen for a tube of a color image.

A known method of manufacturing a corrective lens with a discontinuous glass surface 1. The disadvantage of the method lies in the complexity of the process of manufacturing a discontinuous lens surface.

Closest to the proposed method of manufacturing products such as corrective lenses by placing in the form of a transparent substrate and filling the space between the transparent substrate and the punch with a discontinuous forming surface, which has a contour opposite to that of an effective light refracting surface, liquid, capable of hardening polymer 2. The disadvantage of this The method is to reduce the bandwidth of the lenses in the ultraviolet region, or to solarize when exposed to ultraviolet rays in the region of 290-400 nm. Due to this perception or solarization, plastic lenses need to be replaced often.

The purpose of the invention is to increase the throughput of the product. The goal is achieved by those who use a non-salinating polymer as a liquid polymer.

the effect of ultraviolet radiation in the range from 290 to 400 nm. and the fact that in the space between the discontinuous forming surface of the punch and the transparent substrate

an opaque mask is inserted before filling this space with the liquid polymer in the places corresponding to the transitions of the discontinuous forming surface of the punch; an opaque mask is melted into a portion of the hardened n-meter or placed on a transparent substrate. moreover, the mask is applied on the substrate surface by a photographic method by coating the substrate surface with a photoresist, illuminating the photoresist coating with light, dropping through a lens having a discontinuous surface corresponding to the discontinuous forming surface of the punch, wiring the exposed photoresist coating to remove unexposed photoresistive coating from the surface of the boat. applying an opaque material to the coated and uncoated surfaces of the substrate and then removing the exposed areas of the photoresist and the light-impermeable material.

FIG. 1 shows a correction lens in section; in fig. 2 - correction lens, made with a discontinuous surface.

incision; in fig. 3 - lens assembled.

a cross section, the assembly including a lens shown in FIG. 2; un -. ... 6 - assembled lenses, cross-section, made by other variants of the proposed method.

FIG. Figure 1 shows a corrective lens made on a rigid transparent substrate 1, to which a thin transparent non-polarizable polymer layer 2 is attached. The surface of layer 2 on the opposite side of the substrate is the working surface of the lens. The contour of the surface is designed so as to ensure the correction of the light trajectory to different parts of the screen in order to prevent a discrepancy.

In a preferred variant of the method, the substrate 1 is made of 1/4 inch thick optical glass (approximately 6.4 mm), for example, VK7 glass manufactured by SCOTT GLASS, INC. The transparent substrate 1 can be any polymer that has the good transmission characteristics of ultraviolet rays, which oppose the solarization in the wavelength range of 290-400 nm, exhibiting low shrinkage properties.

The material satisfying the above criteria is a transparent silicone (silicone) resin. One type of such resin is manufactured by DOW-CORNING, INC., It is designated 63-489. A layer of silicone resin can be of any thickness, provided that it is sufficient to accommodate specially created unevenness of the working surface. It has been established that the thickness of YuOmilov (1 mil 2.54. Or 254X10-X102 2.54 mm) is sufficient for the lenses shown in FIG. 1. To manufacture the lens shown in FIG. 1, a method is preferred in which a glass substrate 1 is first applied with a primer coating, for example, manufactured by Dow Corning, called Silgard, then a liquid silicone resin, for example resin 63-489, and then biased with a curing agent, for example, supplied DOW-CORNING together with resin 63-489. The mixture obtained is poured into a mold between a punch having a contour of the working surface and a glass substrate. After hardening of the silicone resin, one side of it sticks to a primer-coated glass sublot, the other side has the shape of the desired working surface. Although in this case a primer is used to adhere the silicone resin reliably to the substrate, however, a reliable adhesion can be sufficient without the primer.

FIG. Figure 2 shows another corrective lens, also fabricated on a rigid transparent substrate 1 by applying a thin transparent layer 2 of polymer. The working surface 3 of this lens is divided into a number of sections 4, each of which separately performs optical correction for the corresponding part of the screen of the tube during the formation of the screen according to the known methods of photo printing.

The materials used in the construction .., PS, and their dimensions are the same as those described in FIG. 1. Made for the lens shown in FIG. 1, but the thickness of the polymer layer to create a ii lens with a discontinuous surface is 60–40 mils (about 1 mm), since surface fluctuations from the average level rarely exceed 10 mils (0.254 mm). The areas 5 of the transition surface are located between the areas 10 4 lenses. The light passing through the lens can be partially reflected and diffused. Therefore, it seems appropriate to hide the transitions 5.

FIG. 3, 4, 5 and 6 are lenses whose transitions 5 are masked in various ways.

In the assembly shown in FIG. 3, the lens is covered with a second rigid.1 transparent layer 6, provided with a pattern of opaque strips 7, which exactly correspond to the location of transitions on the working surface of the lens. The second layer (or substrate) 6 is separated from the working surface of the lens by an air gap a.

FIG. 4 shows a second lens assembly.

In this assembly, opaque material 8 is applied directly to the work surface.

lenses at transitions

surface.

FIG. 5 shows a third lens assembly, where the masking pattern is represented as a set of 3Q ki or a grid 9, interspersed into the polymer material.

In the lens assembly shown in FIG. 6, an opaque pattern 10 is applied directly to the substrate before applying a layer of polymer. It is preferable to use graphite as such opaque material 35 in the manufacture of lens units.

All variants of the lens manufacturing method discussed above include a rigid substrate and a polymer layer, in their manufacture relatively inexpensive materials (spatially stable, meeting optical requirements), such as glass, can be used to support thin layers of a relatively expensive non-polarizing polymer. Therefore, the total cost of a lens so constructed 45 can be significantly lower compared to the cost of a lens made entirely of a non-salt material.

The term "lens" has long been used in television technology to manufacture screens for 50 designating refractive devices that change or correct the trajectory of light rays, but do not provide focusing. It should also be noted that for various reasons, well-known to specialists in this field of technology, the correction of the trajectory of the light beam cannot be performed so that it exactly matches the trajectory of the electron beam falling on the screen. A corrective lens can correct the trajectory of the light beam in parts of the screen, allowing it to be mainly consistent.

light rays to those trajectories m, which will be electron beams.

The lenses shown in FIG. 4, 5 and b, it is possible to manufacture using methods similar to those discussed above in the manufacture of lenses shown in FIG. 1 and 2. The lens shown in FIG. 4, can be made by applying a mask directly to the forming surface of the punch. This surface of the punch usually has transitions or sharp drops in the shape of the surface that correspond exactly to transitions 5 in layer 2 of the finished lens. A mask pattern can be formed on these transitions of the forming surface of the punch by applying paint to the transitions of the surface of the punch, which is a mixture of carbon or graphite with selective adhesive, such as a primer material, described above for silicone resin. Such a mask can be obtained on the surface of the punch by photographic methods, using material that is photoresistance, and a mixture of carbon coating.

According to this method, when removing the punch, the opaque material 8 is glued to the surface of the polymer layer, as shown in FIG. four.

When manufacturing the lens shown in FIG. 5, the lattice 9 is placed in the space between the support surface of the substrate 1 and the forming surface of the punch, which is in close proximity to the substrate. The lattice is placed in strict accordance with the transition. My intermittent forming surface of the punch. When the material is filled with a liquid polymer material, the lattice is firmly interspersed in the polymer layer.

When manufacturing the lens shown in FIG. 6, an opaque pattern or mask is made on the support surface of the substrate before the liquid polymer is injected (injected) into the mold. A pattern can be created by blending, surface printing or photographic printing using carbon blends with liquid carriers. For this purpose, paints, inks or materials sensitive to light can be consumed. The created pattern, as before, is exposed in strict accordance with the transitions of the surface of the punch, so that in the finished lens the mask pattern is obtained spatially exactly at the transitions 5 of the layer 2 of the lens made of polymer. Pattern 10 (i.e., a shading mask pattern) can also be made from wire or other opaque screen that is attached to the surface of the substrate.

When creating the shadow mask pattern shown in FIG. 6, by the method of photographic printing, the supporting surface of the glass substrate is coated with a photoresistance material and exposed to light passing through the unshaded lens. At the points of transition of the surface of this unmasked lens, a pattern is obtained in the areas covered by materials that are photoresistance. Unexposed parts

the photodetector is washed away by the development, as a result, open areas of the substrate appear. Next, a coal layer is applied to the coated surface of the substrate. Thereafter, the exposed portion of the photocover 5 is removed along with the carbon layer, and the pattern of the carbon layer remains on the open areas of the substrate. A method of this type is described in more detail in US patent No. 3558310.

The transitions on the surface of the lens correspond exactly to the transitions on the forming surface of the punch, and the pattern or pattern 10 of the carbon layer corresponds to the transitions of the forming surface of the punch when making the lens shown in FIG. 6. The lens that is used for printing the pattern 10 must be 15 pre-made on a press with the same punch to form the pattern 10, in size and line layout exactly matching and absolutely corresponding to the transitions of the forming surface of the punch. Q Although the lenses shown in FIG. 1-6, is made of a polymer adhered to the supporting glass substrate 1, however, the lenses that refract light are made entirely of polymeric material. Other suitable materials can also be used as a substrate, for example glass or metal. The polymer layer of the lens can be separated from the substrate and used as a self-supporting structure, or it can be fixed on some suitable basis for work.

Claims (5)

Invention Formula 0 A method of manufacturing products such as corrective lenses by placing in the form of a transparent substrate and filling the space between the transparent substrate and the punch with a discontinuous forming surface, which has a contour opposite to the contour of an effective light refracting surface, liquid, capable of hardening with polymer, characterized in that the capacity of the product, as a liquid polymer, is used a polymer that is non-solarizable under the action of ultraviolet radiation in the range from 290 to 400 nm. 2. A method according to claim 1, characterized in that an opaque mask is inserted in the space between the discontinuous forming surface of the punch and the transparent substrate prior to filling this space with liquid polymer in the places corresponding to the transitions of the discontinuous forming surface of the punch. 3. The method according to claim 1, characterized in that the opaque mask is fused into a portion of the hardened polymer. 4. A method according to claim 1, characterized in that the opaque mask is placed on a transparent substrate. 5. The method according to claim 4, characterized in that the opaque mask is applied to the surface Photographic substrates by coating the substrate surface with a photoresist, illuminating the photoresist coating with light that has passed through the lens, having a discontinuous surface corresponding to the discontinuous forming surface of the punch, displaying the exposed photoresist coating, coating the coated and negating surface of the substrate with opaque impermeable light by subsequent removal exposed areas of photoresist and opaque material. Sources of information taken into consideration during the examination: 1. US patent L 3628850, cl. 350-175. 1971. 2. German patent Le 1529861, cl. 39 a 1/10 ,. ,,, jf -., -. ,,. J five ,     / .. .-; -:. ////// l Phi2. JE , // ////, /, / -. .