DE8814084U1 - Telescopic lens - Google Patents

Description

Note Prof.Dr.med.Hermann Geriet 44 Munster DE Note No. 1318667

Telescopic lens

In my own utility model applications, namely G 88 04 514.5 (filing date 6.4.1988) and G 88 07 504.4 (filing date 9.6.1988) I have described a telescope lens of various designs which, compared to my own earlier telescope glasses (G 81 21 262.3, filing date 20.7.1981), allows for magnifications that are several times higher and - due to the practical lack of hatches or apertures - at the same time a large field of view, vision and observation. "feic" for comfortable and easy-to-wear telescope glasses.

'Thereafter, the telescopic spectacle lens allows various designs of the above-mentioned utility model applications (G 38 C" 514.5

s and G 88 07 504.4) together with normal or ametropia

Eyes of telescope glasses users in suitable eye position

f an optimal field of vision and observation.

&ngr; The subject matter of the application from G 88 04 514.5 and G 88 07 504.4

has so many optical advantages for the user _that it seems conceivable that another side might try

'■ It could be possible to circumvent the above-mentioned subject matter of the application by creating hatches or apertures again, as compared to G 88 04 514.5 and G 88 07 504.4, by reducing the inner radius of the telescopic lens accordingly and thereby accepting considerably smaller fields of vision and observation as compared to G 88 04 514.5 and G 88 07 504.4.

In order to counteract this from the outset, the aim is

of this utility model application, while retaining all the provisions of the introduction, the description, the claims and the drawings of G 88 04 514.5 and G 88 07 504.4
to extend the protection claim to a smaller inner radius (and thus also outer radius) of the telescopic spectacle lens.

In the following, another telescopic lens is described and its shape is shown using a drawing. In this drawing, the inner radius is drawn by hand because it can no longer be produced with a conventional compass. In addition, another telescopic lens with a very small spherical inner surface curvature (0.1 mm) is described.

Description

The illustration shows a telescopic lens made of high-refractive glass (e.g. La SF 35) with a refractive index η = 2.020 in side view.

The spherical front surface curvature is 0.00429 m (4.29 mm = +237.92 Dptr), the spherical back surface curvature is 0.0005 m (0.5 mm = -2040.OODptr). The lens diameter is 0.0042 m (4.2 mm), the axial lens thickness is 0.0075 m (7.5 mm).

This telescopic lens, which is located in front of both eyes of the user, has a refractive power of 0 Dptr, i.e. ss is afocal, and a magnification of 8.5726 for a normal-sighted eye with the dimensions of the normal eye (Gernet).

If you want to use the telescope lens in the image described here to compensate for spherical refractive errors of a user's eye (for example +2.75 Dptr for a normal eye with insufficient refractive power of its human eye lens) or spherical refractive errors of the dome section from P 35 90 114.4-51 (Figure 2, V = 1.38) mentioned in G 88 04 514.5 and G 88 07 504.4, the spherical front surface curvature does not need to be additionally adjusted due to the unusual shape of this telescope lens, but rather all parameters of the described telescope lens can be retained. For the above-mentioned ametropia user's eye (+2.75 Dptr), the magnification is 8.921.

When the eyes of the above-mentioned normal-sighted user are brought as close as possible to the inner wall of the dome, the combination of dome section (V = 1.38) - telescope glasses (V = 8.5726) for the distance of 1.38 . 8.5726 results in a magnification of V = 11.8302, i.e. around 11.83.

It is possible that future significantly refined centring methods and possibilities of a telescopic spectacle lens of different designs to the visual line of the eyes of users will also ^make it possible to use a telescopic spectacle lens
iiiit rfSSsntlich smaller spherical zünenfIäciienk*rün>in.un2
makes sense. Of course, with such a telescopic lens, the two centers of the spherical outer and inner surface curvatures must lie exactly on the center axis of the telescopic lens, as is the case for every telescopic lens by definition.

In the following, such a telescopic lens is described. A clear drawing of this telescopic lens
is no longer possible due to the tiny spherical inner surface curvature, but the following information describes the telescope lens precisely. v;

non-hereditary front surface curvature amounts to 0.00389 m 1

I (3.83 mm = +262.40 Dptr), the spherical back surface curvature sj 0.0001 m (0.1 mm = -10200.00 Dptr). The lens diameter is ■ at the boundary to the spherical front surface curvature
0.0036 m (3.6 mm), the axial glass thickness is 0.0075 m
(7.5 mm) and the refractive index of the high index glass is 2.020. I

This telescope lens, which is located in front of both eyes of the user in a pair of telescope glasses, has the refractive power
0 Dptr, ie it is afocal, it has the magnification 38.8638
(38.9 times) for a normal-sighted user eye with the dimension of the normal eye (Gernet). :

- 5 - &udigr;

Claims (2)

Protection claims (including G 88 04 514.5 and G 88 07 514.4) 1) Telescopic spectacle lenses of various designs for telescopic spectacles for users with normal vision, made from optical material such as glass, plastic, which can be worn in standard spectacle frames characterized by lens diameters from 0.0036 m (3.6 mm) to 0.028 m (28 mm) refractive indices from 1.349 to 2.150 axial lens thicknesses from 0.0075 m (7.5 mm) to 0.012 m (12 mm) spherical front surface curvatures from 0.00389 m (3.89 mm) to 0.0174186 m (17.4186 mm) Spherical back surface curvatures from 0.0001 m (0.1 mm) to 0.011 m (11 mm) 2)
^ Telescopic spectacle lenses of various designs according to protection ■v claim 1) with additional dioptric effect of the glass front elements to compensate for spherical refractive errors of the user's eyes with poor vision for distance and/or near vision and to compensate for refractive errors of telescope-like optical elements with spherical-concentric boundary surfaces, which have the following shape and data: refractive index from 1.70 to 1.93
Thickness from 0.09 m to 0.32 m Outer radius rl of the spherical curvature from 0.15 m to 0.54 m Inner radius r2 of the spherical curvature from 0.09 m to 0.22 m and identical center of curvature of outer and inner curvature see exercise Protection claims (continued) Telescopic spectacle lenses of various designs according to protection d<Tsurface to compensate for astigmatic refractive errors of the ametropia of users