RU2061964C1 - Optical device to determine fertile days - Google Patents

Abstract

FIELD: medical equipment. SUBSTANCE: invention can be used to examine transparent preparations. Optical device to determine fertile days has case, eye-piece, objective lens and slide. Objective lens is positioned between eye-piece and slide. Fixture to hold slide has window for its illumination. Window is located at distance not less than five diameters of window from slide. EFFECT: simplified design, improved efficiency of optical device. 2 dwg

Description

 The invention relates to medical equipment, namely for microscopic analysis of the crystal structure of a smear of saliva of women in domestic conditions, as the first link in the diagnosis of some disorders of the reproductive function of women.

 Although changes in the physical and chemical properties of saliva cannot be considered as a direct indicator of ovulation, but only as a test to judge the change in the degree of estrogenic saturation of a woman’s body during the minstrual cycle, it can be used to determine a dangerous and safe time for pregnancy.

 Currently, there is no device that, by its design, would be easy to use and a woman could constantly have it with her and use it in almost any environment.

 The purpose of the invention is to improve image quality in the study of transparent preparations in ambient light, simplifying the technological design or mass use.

 This goal is achieved in that the device for the study of transparent preparations consists of a tube with a lens and an eyepiece, devices for holding and lighting a glass slide. In this case, the device for holding and illuminating the slide is made in the form of a hollow opaque case with a slide for the slide and a diaphragm connected to the tube so that the diaphragm is located relative to the slide from the side opposite to the lens and is not removed from the slide less than five diameters of the aperture. The focusing device is either in the form of a movable, for example, a threaded connection of the tube / with the lens and eyepiece / with the body of the device for holding and illuminating a glass slide / option 1 / or in the form of a leash connected to the lens, movably mounted inside the tube, while the tube with a lens and an eyepiece and a device for holding and lighting a glass slide are made in the form of a single housing / option 2 /. To exclude the arbitrary movement of the slide and focusing disorders, a spring is mounted in the device for holding and lighting the slide, resting on the side ribs of the slide.

 The invention is illustrated by drawings.

 In FIG. 1 shows a variant of the device; FIG. 2 represents a variant of the device.

 The device made in 1 embodiment contains a diaphragm 1 and a spring 3 installed in the body 2 of the device for holding and lighting a slide 5, placed in the groove 4. The body of the device for holding and lighting a slide with a threaded connection is connected to the tube 7. From the side of the slide glass in the tube placed lens 6, and on the opposite side mounted eyepiece 8.

 The device, made in version 2, contains a common housing 2, in which a diaphragm 1 and a spring 3 are installed on one side to hold a glass slide 5, placed in the groove 4 and on the other side of the eyepiece 8. The lens 6 is movably mounted in the housing and equipped with a leash 7 .

 The device operates as follows: Light from a scattered source passing through the diaphragm 1 forms at a sufficiently large distance / of the order of 5 or more diameters of the diaphragm / beam of spatially coherent rays illuminating various elements of the saliva smear deposited on a glass slide 5. In this case, inhomogeneities in the smear saliva having different refractive indices pass rays of different intensities towards the lens 6, which provides a contrast image formed by the lens 6 in the background plane of the eyepiece 8 through which an enlarged image of a saliva smear is examined. Image focusing is carried out by increasing the distance between the lens and the glass slide. In the first embodiment, this is achieved by screwing / screwing / the body of the device for holding and lighting the glass 2 on the tube 7, and in the second embodiment, by moving the lead 7, which is rigidly connected with the lens 6, in the inclined slot of the body 2.

 Thus, the proposed device in its design and technical characteristics can provide high reliability testing / diagnostics /, simple and convenient to use and can be used in almost any environment.

 The device is small-sized and its use is not related to the effect on a woman’s body, and the crystallization phenomenon has been tested and is widely used in medical practice.

 Since the evaluation of research results using the proposed device does not require special medical training, it can be recommended to a wide range of women as a means of family planning, which is of particular importance in the face of a shortage of mechanical and medical contraceptives.

 Using the device in everyday life will help a woman monitor ovarian function, detect violations of this function, and seek medical help in a timely manner.

Claims (3)

 1. An optical device for determining fertility days, comprising a case, an eyepiece, a glass slide and a device for holding it, characterized in that the device further comprises a lens located between the eyepiece and a glass slide; a window for illuminating the glass slide is made in the device for holding a glass slide located on the optical axis of the device at a distance of at least 5 window diameters from the slide.  2. The device according to claim 1, characterized in that the lens is mounted to move along the optical axis.  3. The device according to claim 1, characterized in that the glass slide is removable, and the device for holding it is equipped with a spring holding the glass slide by the ribs.

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