SU22955A1 - Instrument for epidemiological and microprojection - Google Patents

Description

The proposed device for epi-dia and micro-design is intended to enable, with a relatively weak light source (even with a kerosene lamp), to obtain bright images of opaque pictures, transparencies and microscopic preparations on the screen. At the same time, to obtain a microprojection, neither a condenser nor a special illuminator is required. In addition, without the use of a cooling bath, the preparation, the slide and the opaque picture are not subjected to harmful heating, inherent in all existing systems of epidiascopes.

The above features in the proposed device are achieved by the fact that the convergent beam of light used to illuminate an object is obtained from a beam of parallel rays, whereby most of the rays undergo two and threefold reflection. Such a path of the rays ensures the greatest loss of heat by them while maintaining a sufficient illumination brightness.

In FIG. 1 depicts a setup for the projection of opaque paintings; FIG. 2 is the same for the projection of transparencies; FIG. 3 - the same for microprojection.

The device (Fig. 1) consists of two parabolic mirrors 1 and 2 arranged one against the other, with axes constituting an acute angle in the horizontal plane, the magnitude of which depends on the size of the device. Mirror 1 has a smaller focal length than mirror 2, and a light source is placed at its focus. The top of the mirror 2 is located on the axis of the mirror 1. Both mirrors are cut in two mutually perpendicular planes to be placed in a box, in one wall of which there is a lens 5 for epioscopic projection. A window 4 is made in the opposite wall of the box to place an opaque object or transparency 6 and then lens 7 for the diascopic design (Fig. 2). In the same window, at the apex of the convergent beam, the microscopic preparation 8 can be placed, followed by the objective 9 from the microscope for microprojection (Fig. 3).

For a more complete utilization of the light source, a spherical mirror 3 is placed at the wall with a window 4 and centered in mirrors 1. The rays coming from the light source located at the F focus 1 of the light source fall on the surface of this mirror, are reflected from it and go to the mirror 2 as beam of parallel rays. Here, they are reflected a second time and collected at the fi focus (Fig. 1).

If in the path of these rays in the window 4

put an opaque pattern, and positioning the lens 5 against it - the image of the picture will be displayed on the screen (Fig. 1). If in the window 4 you place an opaque object or a slide 6 (Fig. 2), and in front of it is a lens 7, then the projection of the slide is displayed on the screen. If a microscopic preparation 8 is placed at the apex of a conical beam of rays that emerges from window 4, and in front of it is a lens from a microscope 9 with a slight increase (up to 30 times), then, as directed by the inventor, a clear projection of the preparation with an increase of up to 500 (Fig. 3).

The subject matter of the invention.

1. A device for epi-dia and micro-design, characterized by the use of two parabolic mirrors 1 and 2 arranged opposite each other with axes constituting in the horizontal plane an acute angle, of which mirror 1 has a smaller principal focal length and in its focus is placed a light source, which mirrors cp3aHifi in two mutually perpendicular planes for placing — their box, in one wall of which the lens 5 is placed for episcopic projection, and in the opposite wall there is a window 4 for placing opaque about An object (Fig. 1) or a slide 6 and behind it an objective 7 for a diascopic design (Fig. 2), or a microscopic preparation 8 at the apex of a converging beam of light and behind it an objective 9 from a microscope for microprojection (Fig. 3).

2. In the device described in p. 1, use a spherical mirror 3 at the wall with window 4 with the focus at the focus of the mirror 1 for more dense utilization of the light emitted by the source (Fig. 1).