RU2458371C2 - Orthoscopic eyepiece with removable exit pupil - Google Patents

Abstract

FIELD: physics.

SUBSTANCE: first component contains two diverging lenses lying symmetrically about each other and the second component contains two converging lenses lying symmetrically about each other. The refracting surfaces of the lenses of each of the components are formed by moving the generatrix on a guide, which is in form of circular arcs or curves with varying radius of curvature.

EFFECT: reduced distortion and wide field of vision.

1 dwg

Description

The invention relates to optical instrumentation and can be used in optical systems of double symmetry.

Known orthoscopic eyepiece with a remote exit pupil (G02B 25/00 No. 442445 from 05/18/72.) Containing negative and positive components, consisting of lenses with spherical refractive surfaces.

The aim of the invention is to reduce distortion and increase the field of view of the eyepiece.

The goal is achieved in that in the eyepiece, the first component contains two negative lenses located symmetrically relative to each other, the second component contains two positive lenses located symmetrically relative to each other. The refractive surfaces of the lenses of each component are formed by moving the generatrix along the guide. Generators and guides are arcs of circles or curves with a variable radius of curvature.

Figure 1 shows the optical diagram of the eyepiece in two main sections.

The eyepiece consists of two components 1 and 2 of FIG. 1. Component 1 contains negative lenses 3 and 4 located symmetrically relative to each other. Component 2 contains positive lenses 5 and 6 located symmetrically relative to each other. The refractive surfaces of the lenses of each component are formed by moving the generatrix along the guide. Generators and guides are arcs of circles or curves with a variable radius of curvature.

In the embodiment, the generators and guides are arcs of circles.

An example would be an eyepiece.

Sec. 1 r ₁ = -25 r ₂ = -125 r ₃ = + 125 r ₄ = + 25 r ₅ = + 12 r ₆ = + 60 r ₇ = -60 r ₈ = -12 Sec. 2

d ₁ = 1, d ₂ = 3, d ₃ = 1, d ₄ = 25, d ₅ = 1.5, d ₆ = 1, d ₇ = 1.5 where r are the radii of the corresponding generators and guides;
d is the thickness of the lenses and the distance between the lenses.

The lenses of the first component are made of glass with a refractive index of n = 1.5163.

The lenses of the second component are made of glass with a refractive index of n = 1.806.

Focal length F ¹ = 5.2.

The focal segment S ¹ = 9.3.

The field of view in the meridional direction is 36 ° along the diagonal of 50 °.

The use of generators and guides in the eyepiece, which are curves with a variable radius of curvature, will improve the quality of the eyepiece.

Claims (1)

An orthoscopic eyepiece with a remote exit pupil containing negative and positive components, characterized in that the first component contains two negative lenses located symmetrically one relative to another, the second component contains two positive lenses located symmetrically one relative to another, refracting the lens surfaces of each components formed by moving the generatrix along the guide, which are arcs of circles or curves with a variable radius of curvature.