US1347044A - Adjustment of uniocular telemeters - Google Patents

Description

A. KUNIG. ADJUSTMENT 0F UNIOCULAR TELEMETERS.

APPLICATION FILED APR. 8 I915- RENEWED DEC. 29. 1919.

1,347,044. Patented Jul 20, 1920.

UNITED STATES PATENT OFFICE.

ALBERT KGNIG, OF JENA, GERMANY, ASSIGNOR T0 FIRIVI 0F CARL ZEISS, 0F JENA, GERMANY.

ADJUSTMENT 0F UNIOCULAR TELEMETERS.

Specifidation of Letters Patent.

Patented July 20, 1920.

Application filed April 8, 1915, Serial No. 20.063. Renewed December 29. 1919, Serial No. 348.20%.

To all whom it may concern:

Be it known that I, ALBERT Konie, a citizen of the German Empire, residing at Jena, (.termany, have invented a new and useful Adjustment of U niocular Tclemeters, of which the following is a specification.

The present invention relates to improvements in the adjustment of a uniocular telemeter having the base-line within itself by employing a second telemeter used in the reversed path of the rays with a base-line of emergence being turned toward the entrance openings of the telemeter to be adjusted and its objectives offering images of an object of adjustment to the objectives of the first instrument. In a well known adjustment of this kind a stroke mark is used as an object of adjustment the mark being placed in the focal plane of the objectives of the telemeter placed in front. The two part pencil systems, in which a ray pencil system entering through the ocular of the telemeter placed in front is dispersed through the separating prism of this telemeter, create two ima es of the mark, each of which is conveyed to one of the two objective systems of the instrument to be adjusted.

According to the present invention such a stroke mark in the field of View is dispensed with in such a way that through the ocular of the second telemeter any object is imaged in the focal plane of the objectives of the latter and is offered through these objectives to the telemeter to be adjusted. The accuracy of the adjustment is the greater, the less the mutual position of the base-lines 01" the instruments deviates from that in which they are exactly parallel to each other. In order to facilitate such a disposition of the instruments to each other each may be fitted with a level. The accuracy of adjustment is further increased by choosing as object of adjustment a stroke mark placed in such a position as regards the base-line that it stands vertical on the latter. Such a disposition can be taken with advantage in such a way that the telemeters are set up each with horizontal basis and that a vertical hanging thread serves as object of adjustment.

Figure 1 of the annexed drawlng shows a side view and Fig. 2 a top view of a device for using the invention.

A telemeter b is so placed opposite the about equal length, its openings of telemeter a to be adjusted, that its openings of emergence of light b and b are turned toward the entrance openings of light a and a of the telemeter a. A transparent plate 0 is placed in front of the ocular I) of the second telemeter Z), having a stroke mark 0 serving as object of adjustment. If the ocular b of the telemeter Z) is focused accordingly, an image of the mark 0 in the focal plane of the objectives of the telemeter b is created, and each of the objectives of this telemeter offers to one of the objectives of the telemeter a a part image of the mark 0, which can then be observed through the ocular a of the telemeter a.

I claim:

1. Method of adjusting a telemeter comprising an ocular, two objective reflecting systems the distance apart of which systems forms the base-line of the telemeter, two objective lenses each placed behind one'of the said objective reflecting systems and a separating prism system adapted to transmit the two ray-pencil-systems entering the said objective reflecting systems to the said ocular, which method consists in imaging in the focal plane of a similar second telemeter having a base-line of about equal length any object by means of the ocular of the said second telemeter, placing the telemeter to be adjusted opposite the second telemeter in such a manner, that the rays emerging from the second telemeter enter the objective refleeting systems of the telemeter to be adjusted, and observing by means of the ocular of the telemeter to be adjusted the two images, each of which is formed by one of the objective lenses of the telemeter to be adjusted from the rays passing through this objective lens.

2. Method of adjusting a telemeter comprising an ocular, two objective reflecting systems the distance apart of which systems forms the base-line of the telemeter, two objective lenses each placed behind one of the said objective reflecting systems and a separating prism system adapted to transmit the two ray-pencil-systems entering the said objective reflecting systems to the said ocular, which method consists in fitting on a similar second telemeter having a base-line of about equal length before its ocular relatively close to this second telemeter by means of a support a mark, imaging this mark in the focal plane of the said second telemeter by means of the ocular of the second telemeter, placing the telemeter to be adjusted opposite the second telemeter in such a manner, that the rays emerging from the second telemeter enter the objective reflecting systems of the telemeter to be adjusted, and observing by means of the ocular of the telemeter to be adjusted the two images,

each of which is formed by one of the ob-' jective lenses of the telemeter to be ad- 10 'justedfrom the rays passing through this objective lens.

ALBERT KONIG.

Witnesses:

FRANZ RIEDINGER, RICHARD HAHN.

Images