Optical: systems and elements – Compound lens system – Telescope
Reexamination Certificate
1999-04-26
2001-03-20
Spyrou, Cassandra (Department: 2872)
Optical: systems and elements
Compound lens system
Telescope
C359S411000, C359S415000
Reexamination Certificate
active
06204966
ABSTRACT:
The invention relates to binocular telescopic magnifying spectacles with features recited in the preamble of claim
1
.
Such binocular telescopic magnifying spectacles or close-up spectacles are designed as visual aids for weak-sighted and as operational spectacles. To this end, they are adjusted by the user in accordance with a distance between the eyes. In case the telescopic magnifying spectacles need be used for different operational distances, the pupil distance even for the same user does not remain constant at the different operational distances. For an infinite distance, the visual axes of the eyes remain parallel, for a close-up region, they converge, whereby, on one hand, the angle of the visual axes changes, and, on the other hand, the pupil distance diminishes. Further, with convergence, the distance of the eye pupils from the apparatus (cornea vertex distance) changes.
In the known telescopic magnifying spectacles, the above-mentioned conditions are partially adjusted. In the binocular telescopic magnifying spectacles according to German Publication DE 40 04 248 A1, a correct axis setting is effected along an arc the center of which lies in the eye center, however no coupling of the axis setting with the distance setting takes place. This means that the user should set a correct axis setting for a predetermined distance or set a correct distance for a predetermined axis setting. Further, the axis setting of the right and left tubes should be done separately, which creates additional operational difficulties. In the known binocular telescopic magnifying spectacles according to Austrian publication AT 000 307 U1, the distance between the tube axes is adjusted with a servo motor to a correct parallax in accordance with the distance. However, this movement is rectilinear so that the apparatus pupils are spaced from the eye with an increasing convergence, whereby the observable visual field is essentially trimmed when the apparatus is supported by an end collar. In the known binocular telescopic magnifying spectacles according to 98 782 B, the axis setting takes place along a spatial curve which is defined by an outer link secured at one side. At the convergence, the apparatus horizon changes. Likewise, for retaining the cornea distance, the horizon should be retained.
For all of the above-described and known apparatuses, it is common that they cannot be used as binoculars, in which only the eye distance and the distance need be set, rather additional, time-consuming, complicated and excessive settings to be effected by a user are required.
An object of the invention is to eliminate these drawbacks and to simplify the setting of the binocular telescopic magnifying spectacles which, according to the invention, is achieved by features and measures which form the content and the subject matter of the characterized clause of claim
1
. The eye diameter in an adult amounts to about 24 mm. Because the pivot axes of both telescope optics are spaced from ocular exit pupils, with smaller eye diameters, lie the pivot axes, respectively, inside the eyes of a user. Thereby, by a change of the operational distance and thereby of the convergence angle, the setting with respect to a changing pupil distance is essentially retained. Advantageously, the pivot axes are spaced from the ocular exit pupils, respectively, by approximately a half of the eye diameter, i.e., they lie in the eye center or the rotational center of the eye of the user, whereby the setting with respect to the eye distance, with a change of the operational distance, is retained to a most possible degree. Preferred embodiments of the invention are recited in dependent claims.
The invention will now be explained in detail with reference to the drawings, without limiting the invention to the shown embodiments. It is shown in:
FIG. 1
a schematic view of telescopic magnifying spectacles;
FIG. 2
a perspective view of an embodiment of telescopic magnifying spectacles;
FIG. 3
a plan view of the telescopic magnifying spectacles after the removal of the housing;
FIG. 4
a front view;
FIG. 5
a bottom view;
FIG. 6
a structural component with a control crank;
FIG. 7
a perspective angular view of a holder for a telescope;
FIGS. 8-10
plan, evaluational and side views, respectively, of a U-shaped part;
FIG. 11
a plan view of an inner side of a housing portion;
FIG. 12
its elevational view;
FIG. 13
a further schematic view; and
FIG. 14
a cross-sectional view along line A—A in FIG.
13
.
REFERENCES:
patent: 1033965 (1912-07-01), Troppman
patent: 3029696 (1962-04-01), Schmidt
patent: 5572361 (1996-11-01), Kamiya et al.
patent: 5604631 (1997-02-01), Gelardi et al.
patent: 5966239 (1999-10-01), Shirayanagi et al.
patent: 4004248 (1990-08-01), None
patent: 9303663 (1993-06-01), None
patent: 9117465 (1991-11-01), None
patent: 9609566 (1996-03-01), None
Brown & Wood LLP
Robinson Mark A.
Spyrou Cassandra
LandOfFree
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