SU1290229A1 - Magnifying glass - Google Patents

Abstract

The invention relates to optical instrument making and allows to simplify the design and increase the luminosity of the device. In the loupe, the ocular component is made with a negative optical power of two negative menisci 7 and 8.9 convex to each other, coma measurement and magnification of the device. In the collective component, negative lenses 3 and 5 are made concave-flat and glued with positive lenses 2 and 4. Prism 6 together with lenses 2-5 contribute to the development of luminosity by varying the magnitude of spherical aberration. The objective segment of the magnifying glass is 2.5-2.6 of its focal length, which provides free access to the object during operation. Svetosi.- la magnifying glass 1-2. I il., (L

Description

I

The invention relates to an optical instrument making, namely, a magnifying glass with an enlarged objective length.

The aim of the invention is to increase the luminosity and simplify the design.

The drawing shows an optical magnifying glass circuit.

The magnifying glass contains a convex lens I successively arranged along the beam, facing the object with a plane, two positive two-glued lenses composed of 2.3 and 4.5 lenses, respectively, with lenses 2 and 4 positive, and 3 and 5 negative, a prism 6 serving for fracture of the optical axis, oir is the persistent meniscus 7, facing by concavity to the object plane, and a two-glued negative meniscus composed of lenses with different optical signs 8 and 9

All circuit elements are closely interrelated.

However, it is possible to identify elements that are most actively affecting one or another aberra.shsho or system parameter. So S for example, element 4 and 5 dramatically change the astigmatic difference; 1,2,357 change the subject line 7,8,9 - coma, increase chromatism; 352,4,5,6 - contributes to the development of luminosity; vary the magnitude of spherical aberration.

The proposed loop has a luminosity of 1-2, the subject segment is composed by V.A. ekhnpov editor N.Gorvat Tekhreshch A.Kravchuk Corrector L.Obruchar

Order 7896/42 Circulation 544 Subscription

VNIIPI USSR State Committee

for inventions and discoveries 1 13035, Moscow, F - 35, Raushsk pub. ., d, 4/3

Production and printing company, Uzhgorod, st. Project, 4

 2.5 to 2.6 focal length.

The quality of the loop image is characterized by the following values calculated in the reverse direction of the rays: longitudinal spherical aberration for the main wavelength (line D) tie more than 0.1 mm chromaticism in the spectral range from line C to line F not more than 0.15 mm, relative distortion is 3%, astigmatism is less than 0.15 rm, magnification chromatism is 0.01 mm, and aberrations of narrow oblique beams do not exceed 0.03 mm.

Angle field of view of a magnifying glass 20.

Claims (1)

Invention Formula 0 five A magnifying glass containing a positive collective component, a prism and an eye component, the collective component containing a single lens and two two-fold positive lenses, each of which consists of a two-convex and negative lenses, 1 laser component contains two lenses, characterized in that enhancements of luminosity and simplified construction, atrial of each of the two-glued lenses are made concave-flat, the eye component is made with negative; optically optical force of two negative meniscus faces; s convexity to each other, the second of glued kotork of DVO and kovtukloy. .cooded lenses.