RU2804311C1 - Liquid optical medium with special dispersion course - Google Patents

Abstract

FIELD: chemistry.

SUBSTANCE: liquid optical medium (LOM) with a special course of dispersion based on meta-bis (phenoxyphenoxy) benzene additionally contains para-xylene in the following ratio of components: meta-bis (phenoxyphenoxy) benzene 80 parts by weight, para-xylene 20 parts by weight.

EFFECT: minimization of chromatic aberrations and provision of a refractive index of more than 1.515 with the possibility of use at low temperatures.

1 cl

Description

Region and level

The invention relates to optics, in particular to liquid optical media (LOM).

Various liquid optical media and methods for their preparation are known.

For example, there is a known method for producing liquid optical surfaces [RU 2115144, C1, G02B 1/06, 07/10/1998], in which immiscible or partially miscible liquids are poured into a cuvette, wetting the walls of the cuvette, and one of the liquids used is a fluorocarbon liquid with the general formula C _n F _m , and after pouring, the initial mechanical action on these liquids pushes the layers of the upper liquids apart to the C _n F _m layer until reproducible optical surfaces are formed at the interfaces of liquids and liquids and gases.

The disadvantage of this method is its relatively narrow scope of application.

Liquid media are also known, made, in particular, in the form of microlenses [US 6936196, B2, B29D 11/00; G02B 3/14, 12/11/2003], which include a drop of liquid, the position and/or curvature of the surface of which can be changed (adjusted), for example, by selective displacement of one or more electrodes configured for the specified drop, while the drop contains an optically curable a liquid adhesive that polymerizes when exposed to UV radiation, allowing the desired configuration, such as the focal length of a microlens, to be fixed.

The disadvantage of such an environment is the relatively narrow scope of application.

The closest in technical essence to the proposed one is a liquid optical medium used to create a varifocal liquid lens [RU 2652522, C1, G02B 3/14, 05/16/2017], which is a drop of liquid that absorbs radiation in the volume of the drop and sits on a solid transparent substrate , moreover, the restructuring of the focal length of the drop is caused by a change in the curvature of its free surface due to the thermal effect of the laser beam on the drop, while the liquid is non-volatile and in the absence of laser radiation the drop of liquid is a collecting lens (objective), the curvature of the surface of the drop changes under the influence thermocapillary forces excited by the thermal effect of the laser beam on the drop, and the magnitude and sign of the curvature and focal length are determined by the power of the laser beam.

In this case, the liquid lens contains two components - water and 1-bromododecane, and the presence of water in the liquid does not allow obtaining a liquid medium with a refractive index greater than 1.515, provided that it is used at low temperatures.

In addition, in optical instrumentation, when creating wide-spectrum television and photographic cameras using silicon television matrices, it is usually required to provide high-quality images in a spectral range with a width of more than 300 nm.

To provide the aberration chromatic correction required for these purposes, at least two optical materials with different dispersion paths are needed, and at least one of them must have a special dispersion path, like expensive OK4 (special crown) and OF6 (special flint) glasses. The known liquid medium has a normal (not special) dispersion course and is not suitable for correcting chromatic position aberration in a wide spectral range in combination with glasses with a normal dispersion course.

This narrows the scope of application of the known liquid optical medium.

For the first time, the idea of creating liquid optical media with a special dispersion course was proposed by M.V. Agrinsky. in 1986. Unlike glasses with a special dispersion course, these systems are technologically and economically more feasible, since they do not require, as for glasses of the OK and OF groups, the use of high temperatures during long-term glass melting. Liquid optical media with a special dispersion pattern are formed due to hydrogen and covalent bonds.

Information on the creation of liquid optical media (LOM) with a special dispersion course was published in Reports of the USSR Academy of Sciences: DAN USSR 1988, volume 302 No. 1, pp. 95-98. Petrovsky G.T., Tokarev A.A., Volynkin V.M., Agrinsky M.V. “Creation and application of liquid optical media with a special dispersion course.”

The influence of hydrogen bonds on the specific course of ZhOS dispersion is considered in the Journal of Physical Chemistry (ZhFKh 1990, volume 64 No. 6 pp. 1560-1568. Volynkin V.M., Petrova M.V., Petrovsky G.T., Tolstoy M.N. “The influence of hydrogen bonding in solutions of strong acids on their dispersive optical properties”).

The LOS created at that time with a special course of dispersion based on aqueous solutions have a low refractive index in the region of 1.3-1.4 (Author’s certificate No. 283230 “Liquid optical medium.” Authors: Agrinsky M.V., Volynkin V.M. , Petrovsky G.T., Tokarev A.A.). When developing lenses, a large number of glasses with a high refractive index are used. Therefore, Fresnel reflection from lens surfaces leads to a decrease in the light transmission of the lens.

The essence of the invention

The problem that is solved in the invention is aimed at creating a liquid medium with a special dispersion course to minimize chromatic aberrations and with a refractive index of more than 1.515 with the possibility of use at low temperatures.

The stated problem is solved, and the required technical result is achieved by the fact that the ZhOS contains meta-bis (phenoxyphenoxy) benzene additionally contains para-xylene in the following ratio of components: meta-bis (phenoxyphenoxy) benzene - 80 parts by weight, para-xylene - 20 parts by weight parts.

Refractive indices at 20°C: n _g 1.64467, n _f 1.63106, n _e 1.61773, n _c 1.60604.

Thus, the proposed composition of the LOS allows us to solve the technical problem - the creation of a liquid optical medium with a special dispersion course and ensure the creation of a liquid medium with a refractive index of more than 1.515 with the possibility of use at low temperatures.

Implementation of the invention.

At the enterprise where the R&D was carried out, liquid optical media were manufactured in accordance with the invention.

A few words about the result of testing the claimed invention.

The experimentally created liquid optical medium contains components and their percentages in such a composition and quantity that it allows us to solve the tasks:

1. Creation of a liquid medium with a special dispersion course to minimize chromatic aberrations;

2. Increase in refractive index more than 1.515;

3. Possibility of using liquid optical media at low temperatures.

Thus, the result must correspond to the goal of eliminating the shortcomings of the prototype, because The claimed invention had expanded functionality.

Claims (1)

A liquid optical medium (LOM) with a special dispersion based on meta-bis (phenoxyphenoxy) benzene additionally contains para-xylene in the following ratio of components: meta-bis (phenoxyphenoxy) benzene 80 parts by weight, para-xylene 20 parts by weight, which makes it possible to obtain refractive index more than 1.515 and use ZOS even at low temperatures.