SU1695185A1 - Optic system of shadow device for investigating inhomogeneities in transparent gaseous, liquid and solid media - Google Patents

Abstract

The invention relates to optical systems for shadow and interference devices for the study of inhomogeneities in transparent gaseous liquid and solid media. In order to obtain high image quality when using a wide-aperture-light source in lenses of a single-turn system containing a spherical and two-lens afocal compensator, the positive lens of the compensator is convex, the convexity is facing the spherical mirror. the ratio of the convex and concave radii of the positive lens (HWA / KVOGCH) is not more than 0.05. the ratio of the adjacent negative and positive radii of the radius (RC-VH w / Qf) is not more than 3.5, when the rear focal length of the lens is increased to the focal length (S p) is not more than 0.1, while relationship rendered subject to empirical law

Description

The invention relates to optical instrumentation, in particular to optical systems for shadow and interference devices designed to study inhomogeneities in transparent gaseous, liquid and solid media.

The purpose of the invention is to improve the accuracy of the study by providing high quality images of weak irregularities of the investigated transparent media with a wide light source by correcting spherical aberrations of the third and higher orders in the mirror lens lens and astigmatism.

The drawing shows the optical system of the interference-shadow device.

The system consists of an ml entrance slit 1, flat rotating mirrors 2, a mirror / multi-lens, including an afocal compensator 3 and a spherical mirror 4. of the second lens, including an afocal compensator 5 and a spherical mirror b, installed in the opposite direction to the first, and an opaque aperture 7. Investigated transparent medium is indicated by the position b.

The device works as follows

The beams of rays from the entrance slit 1 with an afocal compensator 3 and a spherical mirror 4 are collimated and directed to the transparent medium 8. The afocal compensator 5 and the spherical mirror 6 collect the collimated and scattered

cl

00

cl

from non-uniform beams of radiation from an unsold diaphragm 7 Optical Stcgevde -8 builds a single image of the input jaw 1 on the plane of the non-diaphragm 7 In the absence of neo-R of the R, food is received and an input slash1 | free from spherical aberr | tsi and coma of the third order and higher orders and ToerbCf-) search ig for the reason that it is possible. HJ f oo fLMo chip lenses org fGoaJri with blending of spherical energy and i, and at 0, we’ve seen that optical systems are tetrych1, as indicated by the Oceans, we’re calling each other / Oai, -ioe let Significants H-vbfc H iHT height of the entrance slit, solranrr at rovi high quality of the image, thus allowing the use of a light source with a bop / light body (wide light source), which will expand the possibilities of studying transparent media, for example, ( admission photographing fast processes etc.

When on; -and ai j in the opaque environment of nondiodeeness in the opacity of an opaque iasoragma, the homogeneity builds its .1ssb 1.heme of the entrance slit I, their displacement from the main image | roporf; ogz, ocho vepichine deviation of light; to it on i-single odonnost. Additional isbt bbie images of the entrance slit, oi (geo-aberration and astigyagia, not HER disturbance with the if i v r system is weak. However, the quality is depicted in a little more. Bg, ler high compared to HI. M

On the basis of this optical razraa & g: interference-gene-like PribiAI-463 IAB-466, IAB-468 and Potok.1. The focal distances of the objects are respectively 1840, 000, 4200 100С and 1000 mm with a relative distribution of 2 DLUs empirical proc., abstinency, special studies have been carried out on changing the csgwgt image of the optical system in .ciH Oi, the shape of the protective lens and the pie-eyegiere Choosing the ratios 1 - no vryamtov in which in each object about the concave of the spherical1 about the zerkop 4 and dzukhlinzovogo apokalnogo, oppressators in the field of aberrations) pei then the order is scribed stiggs: ime and beryoci Oyichi

variants - in varying degrees of correction of spherical aberration of higher orders. When correcting aberrations, the radii of curvature of the surfaces of the positive compensator lens and the adjacent concave surface of the negative lens are determined, and these ratios turned out to be essential for optimal correction. Moreover, at different ratios, the back focal length to the focal length of the objective S r / (radius ratio the changes in the S p / f ratio are also associated with a change in the ratio of the radii of curvature of the Nvip / Quo n empirical dependence. This is either 1840 mm objective lens, the back focal length of the lens is 167.5 mm, the ratio of the indicated values 1b 715/1840 0 1 The ratio Qyp / Expressed positive compensator lens is 121.34 / 5445 0.05. The radius of the negative compensator lens surface and the radius of the positive surface of the positive lens adjacent to it is 420 7 / 121.34 3.5.

For clarification, we present the real values of the radius ratios for the instruments IА6-463 and IAB - 466.

For an IAB-463 device, with the ratio of the back focal length of the mirror-lens object to its focal distance S F / f 167.81 / 1849 0, 1, the ratio of Yyvp / Yavognn 121,34 0,022 0,05,

Vvogn otr / Nvip 420.7 / 121 ,,. 5

For an IAB-466 device, the cost ratio is 81 / 997.724-0.14, the ratios of these radii are

Yavip / Rvogn 98 98/3071,, 032,

Reom otr / Rvyp 226,41 / 98, 304.

The change in the radius ratios with the change in the ratio S p / f equal to 0.049, has the values Rfp / Rvnurp / Rwfr 1.163 The changes in the ratios g; eougs in absolute value, the calculated changes about. noshen / si obey eg / worldly

0.049-20-О ОН0 1.163-0.081 0,

Fulfillment of the conditions specified in the invention guarantees obtaining the design of the wrapping system, which ensures the lowest possible abrasiveness.

Comparison of BOLNOGCH aberrations and primary color shows the advantage of the proposed optical system in comparison with izvozi.oG-. about counts that, ito

good image quality is obtained with wave aberrations at a point on the axis not exceeding 0.25.

Claims (1)

The invention is an optical system of a shadow instrument for studying inhomogeneities in transparent media, containing an entrance slit sequentially along the optical axis, two similar lenses mounted opposite to each other, and a diaphragm, each lens contains a spherical mirror and a two-lens afocal compensator,; including a double-bent negative and positive lenses made of a material with the same index of refraction, characterized in that, in order to improving the accuracy of studying weak inhomogeneities in transparent media with a wide-aperture radiation source; the compensator's positive lens is convex-concave, convex to a spherical mirror, the ratio of the back focal length of the objective to its focal length SV / f is not more than 0.1; the ratio of convex and concave radii Vvyp / Yavog positive lens. not more than 0.05, and the ratio of adjacent radii of negative and positive lenses Rvog.otr / Kvyp not more than 3.5, and the changes in these ratios are related by the following relationship: & .20d (ъщ Tkwogn ) - 0.2 (5 (RB ° ™ - ° TP). Kvip